Merge tag 'pm+acpi-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:
"We have a few new features this time, including a new SFI-based
cpufreq driver, a new devfreq driver for Tegra Activity Monitor, a new
devfreq class for providing its governors with raw utilization data
and a new ACPI driver for AMD SoCs.

Still, the majority of changes here are reworks of existing code to
make it more straightforward or to prepare it for implementing new
features on top of it. The primary example is the rework of ACPI
resources handling from Jiang Liu, Thomas Gleixner and Lv Zheng with
support for IOAPIC hotplug implemented on top of it, but there is
quite a number of changes of this kind in the cpufreq core, ACPICA,
ACPI EC driver, ACPI processor driver and the generic power domains
core code too.

The most active developer is Viresh Kumar with his cpufreq changes.

Specifics:

- Rework of the core ACPI resources parsing code to fix issues in it
and make using resource offsets more convenient and consolidation
of some resource-handing code in a couple of places that have grown
analagous data structures and code to cover the the same gap in the
core (Jiang Liu, Thomas Gleixner, Lv Zheng).

- ACPI-based IOAPIC hotplug support on top of the resources handling
rework (Jiang Liu, Yinghai Lu).

- ACPICA update to upstream release 20150204 including an interrupt
handling rework that allows drivers to install raw handlers for
ACPI GPEs which then become entirely responsible for the given GPE
and the ACPICA core code won't touch it (Lv Zheng, David E Box,
Octavian Purdila).

- ACPI EC driver rework to fix several concurrency issues and other
problems related to events handling on top of the ACPICA's new
support for raw GPE handlers (Lv Zheng).

- New ACPI driver for AMD SoCs analogous to the LPSS (Low-Power
Subsystem) driver for Intel chips (Ken Xue).

- Two minor fixes of the ACPI LPSS driver (Heikki Krogerus, Jarkko
Nikula).

- Two new blacklist entries for machines (Samsung 730U3E/740U3E and
510R) where the native backlight interface doesn't work correctly
while the ACPI one does (Hans de Goede).

- Rework of the ACPI processor driver's handling of idle states to
make the code more straightforward and less bloated overall (Rafael
J Wysocki).

- Assorted minor fixes related to ACPI and SFI (Andreas Ruprecht,
Andy Shevchenko, Hanjun Guo, Jan Beulich, Rafael J Wysocki, Yaowei
Bai).

- PCI core power management modification to avoid resuming (some)
runtime-suspended devices during system suspend if they are in the
right states already (Rafael J Wysocki).

- New SFI-based cpufreq driver for Intel platforms using SFI
(Srinidhi Kasagar).

- cpufreq core fixes, cleanups and simplifications (Viresh Kumar,
Doug Anderson, Wolfram Sang).

- SkyLake CPU support and other updates for the intel_pstate driver
(Kristen Carlson Accardi, Srinivas Pandruvada).

- cpufreq-dt driver cleanup (Markus Elfring).

- Init fix for the ARM big.LITTLE cpuidle driver (Sudeep Holla).

- Generic power domains core code fixes and cleanups (Ulf Hansson).

- Operating Performance Points (OPP) core code cleanups and kernel
documentation update (Nishanth Menon).

- New dabugfs interface to make the list of PM QoS constraints
available to user space (Nishanth Menon).

- New devfreq driver for Tegra Activity Monitor (Tomeu Vizoso).

- New devfreq class (devfreq_event) to provide raw utilization data
to devfreq governors (Chanwoo Choi).

- Assorted minor fixes and cleanups related to power management
(Andreas Ruprecht, Krzysztof Kozlowski, Rickard Strandqvist, Pavel
Machek, Todd E Brandt, Wonhong Kwon).

- turbostat updates (Len Brown) and cpupower Makefile improvement
(Sriram Raghunathan)"

* tag 'pm+acpi-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (151 commits)
tools/power turbostat: relax dependency on APERF_MSR
tools/power turbostat: relax dependency on invariant TSC
Merge branch 'pci/host-generic' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci into acpi-resources
tools/power turbostat: decode MSR_*_PERF_LIMIT_REASONS
tools/power turbostat: relax dependency on root permission
ACPI / video: Add disable_native_backlight quirk for Samsung 510R
ACPI / PM: Remove unneeded nested #ifdef
USB / PM: Remove unneeded #ifdef and associated dead code
intel_pstate: provide option to only use intel_pstate with HWP
ACPI / EC: Add GPE reference counting debugging messages
ACPI / EC: Add query flushing support
ACPI / EC: Refine command storm prevention support
ACPI / EC: Add command flushing support.
ACPI / EC: Introduce STARTED/STOPPED flags to replace BLOCKED flag
ACPI: add AMD ACPI2Platform device support for x86 system
ACPI / table: remove duplicate NULL check for the handler of acpi_table_parse()
ACPI / EC: Update revision due to raw handler mode.
ACPI / EC: Reduce ec_poll() by referencing the last register access timestamp.
ACPI / EC: Fix several GPE handling issues by deploying ACPI_GPE_DISPATCH_RAW_HANDLER mode.
ACPICA: Events: Enable APIs to allow interrupt/polling adaptive request based GPE handling model
...

Documentation/acpi/enumeration.txt

···
 			.owner	= THIS_MODULE,
 			.pm	= &mpu3050_pm,
 			.of_match_table = mpu3050_of_match,
-			.acpi_match_table  ACPI_PTR(mpu3050_acpi_match),
+			.acpi_match_table = ACPI_PTR(mpu3050_acpi_match),
 		},
 		.probe		= mpu3050_probe,
 		.remove		= mpu3050_remove,

Documentation/cpu-freq/intel-pstate.txt

···
       no_turbo: limits the driver to selecting P states below the turbo
       frequency range.
 
+      turbo_pct: displays the percentage of the total performance that
+      is supported by hardware that is in the turbo range.  This number
+      is independent of whether turbo has been disabled or not.
+
+      num_pstates: displays the number of pstates that are supported
+      by hardware.  This number is independent of whether turbo has
+      been disabled or not.
+
 For contemporary Intel processors, the frequency is controlled by the
 processor itself and the P-states exposed to software are related to
 performance levels.  The idea that frequency can be set to a single

Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt

···
+
+* Samsung Exynos PPMU (Platform Performance Monitoring Unit) device
+
+The Samsung Exynos SoC has PPMU (Platform Performance Monitoring Unit) for
+each IP. PPMU provides the primitive values to get performance data. These
+PPMU events provide information of the SoC's behaviors so that you may
+use to analyze system performance, to make behaviors visible and to count
+usages of each IP (DMC, CPU, RIGHTBUS, LEFTBUS, CAM interface, LCD, G3D, MFC).
+The Exynos PPMU driver uses the devfreq-event class to provide event data
+to various devfreq devices. The devfreq devices would use the event data when
+derterming the current state of each IP.
+
+Required properties:
+- compatible: Should be "samsung,exynos-ppmu".
+- reg: physical base address of each PPMU and length of memory mapped region.
+
+Optional properties:
+- clock-names : the name of clock used by the PPMU, "ppmu"
+- clocks : phandles for clock specified in "clock-names" property
+- #clock-cells: should be 1.
+
+Example1 : PPMU nodes in exynos3250.dtsi are listed below.
+
+		ppmu_dmc0: ppmu_dmc0@106a0000 {
+			compatible = "samsung,exynos-ppmu";
+			reg = <0x106a0000 0x2000>;
+			status = "disabled";
+		};
+
+		ppmu_dmc1: ppmu_dmc1@106b0000 {
+			compatible = "samsung,exynos-ppmu";
+			reg = <0x106b0000 0x2000>;
+			status = "disabled";
+		};
+
+		ppmu_cpu: ppmu_cpu@106c0000 {
+			compatible = "samsung,exynos-ppmu";
+			reg = <0x106c0000 0x2000>;
+			status = "disabled";
+		};
+
+		ppmu_rightbus: ppmu_rightbus@112a0000 {
+			compatible = "samsung,exynos-ppmu";
+			reg = <0x112a0000 0x2000>;
+			clocks = <&cmu CLK_PPMURIGHT>;
+			clock-names = "ppmu";
+			status = "disabled";
+		};
+
+		ppmu_leftbus: ppmu_leftbus0@116a0000 {
+			compatible = "samsung,exynos-ppmu";
+			reg = <0x116a0000 0x2000>;
+			clocks = <&cmu CLK_PPMULEFT>;
+			clock-names = "ppmu";
+			status = "disabled";
+		};
+
+Example2 : Events of each PPMU node in exynos3250-rinato.dts are listed below.
+
+	&ppmu_dmc0 {
+		status = "okay";
+
+		events {
+			ppmu_dmc0_3: ppmu-event3-dmc0 {
+				event-name = "ppmu-event3-dmc0";
+			};
+
+			ppmu_dmc0_2: ppmu-event2-dmc0 {
+				event-name = "ppmu-event2-dmc0";
+			};
+
+			ppmu_dmc0_1: ppmu-event1-dmc0 {
+				event-name = "ppmu-event1-dmc0";
+			};
+
+			ppmu_dmc0_0: ppmu-event0-dmc0 {
+				event-name = "ppmu-event0-dmc0";
+			};
+		};
+	};
+
+	&ppmu_dmc1 {
+		status = "okay";
+
+		events {
+			ppmu_dmc1_3: ppmu-event3-dmc1 {
+				event-name = "ppmu-event3-dmc1";
+			};
+		};
+	};
+
+	&ppmu_leftbus {
+		status = "okay";
+
+		events {
+			ppmu_leftbus_3: ppmu-event3-leftbus {
+				event-name = "ppmu-event3-leftbus";
+			};
+		};
+	};
+
+	&ppmu_rightbus {
+		status = "okay";
+
+		events {
+			ppmu_rightbus_3: ppmu-event3-rightbus {
+				event-name = "ppmu-event3-rightbus";
+			};
+		};
+	};

Documentation/kernel-parameters.txt

···
 		       no_hwp
 		         Do not enable hardware P state control (HWP)
 			 if available.
+		hwp_only
+			Only load intel_pstate on systems which support
+			hardware P state control (HWP) if available.
 
 	intremap=	[X86-64, Intel-IOMMU]
 			on	enable Interrupt Remapping (default)

Documentation/power/s2ram.txt

···
 hardware during resume operations where a value can be set that will
 survive a reboot.
 
+pm_trace is not compatible with asynchronous suspend, so it turns
+asynchronous suspend off (which may work around timing or
+ordering-sensitive bugs).
+
 Consequence is that after a resume (even if it is successful) your system
 clock will have a value corresponding to the magic number instead of the
 correct date/time! It is therefore advisable to use a program like ntp-date

MAINTAINERS

···
 F:	drivers/pnp/pnpacpi/
 F:	include/linux/acpi.h
 F:	include/acpi/
-F:	Documentation/acpi
+F:	Documentation/acpi/
 F:	Documentation/ABI/testing/sysfs-bus-acpi
 F:	drivers/pci/*acpi*
 F:	drivers/pci/*/*acpi*
 F:	drivers/pci/*/*/*acpi*
-F:	tools/power/acpi
+F:	tools/power/acpi/
 
 ACPI COMPONENT ARCHITECTURE (ACPICA)
 M:	Robert Moore <[e-mail]>

arch/arm/kernel/bios32.c

···
 static int pcibios_init_resources(int busnr, struct pci_sys_data *sys)
 {
 	int ret;
-	struct pci_host_bridge_window *window;
+	struct resource_entry *window;
 
 	if (list_empty(&sys->resources)) {
 		pci_add_resource_offset(&sys->resources,
 			 &iomem_resource, sys->mem_offset);
 	}
 
-	list_for_each_entry(window, &sys->resources, list) {
+	resource_list_for_each_entry(window, &sys->resources)
 		if (resource_type(window->res) == IORESOURCE_IO)
 			return 0;
-	}
 
 	sys->io_res.start = (busnr * SZ_64K) ?  : pcibios_min_io;
 	sys->io_res.end = (busnr + 1) * SZ_64K - 1;

arch/ia64/kernel/acpi-ext.c

···
 	status = acpi_resource_to_address64(resource, &addr);
 	if (ACPI_SUCCESS(status) &&
 	    addr.resource_type == ACPI_MEMORY_RANGE &&
-	    addr.address_length &&
+	    addr.address.address_length &&
 	    addr.producer_consumer == ACPI_CONSUMER) {
-		space->base = addr.minimum;
-		space->length = addr.address_length;
+		space->base = addr.address.minimum;
+		space->length = addr.address.address_length;
 		return AE_CTRL_TERMINATE;
 	}
 	return AE_OK;		/* keep looking */

arch/ia64/kernel/acpi.c

···
 
 static int __init acpi_parse_madt(struct acpi_table_header *table)
 {
-	if (!table)
-		return -EINVAL;
-
 	acpi_madt = (struct acpi_table_madt *)table;
 
 	acpi_madt_rev = acpi_madt->header.revision;
···
 {
 	struct acpi_table_header *fadt_header;
 	struct acpi_table_fadt *fadt;
-
-	if (!table)
-		return -EINVAL;
 
 	fadt_header = (struct acpi_table_header *)table;
 	if (fadt_header->revision != 3)

arch/ia64/pci/pci.c

···
 
 	name = (char *)(iospace + 1);
 
-	min = addr->minimum;
-	max = min + addr->address_length - 1;
+	min = addr->address.minimum;
+	max = min + addr->address.address_length - 1;
 	if (addr->info.io.translation_type == ACPI_SPARSE_TRANSLATION)
 		sparse = 1;
 
-	space_nr = new_space(addr->translation_offset, sparse);
+	space_nr = new_space(addr->address.translation_offset, sparse);
 	if (space_nr == ~0)
 		goto free_resource;
 
···
 	if (ACPI_SUCCESS(status) &&
 	    (addr->resource_type == ACPI_MEMORY_RANGE ||
 	     addr->resource_type == ACPI_IO_RANGE) &&
-	    addr->address_length &&
+	    addr->address.address_length &&
 	    addr->producer_consumer == ACPI_PRODUCER)
 		return AE_OK;
 
···
 	if (addr.resource_type == ACPI_MEMORY_RANGE) {
 		flags = IORESOURCE_MEM;
 		root = &iomem_resource;
-		offset = addr.translation_offset;
+		offset = addr.address.translation_offset;
 	} else if (addr.resource_type == ACPI_IO_RANGE) {
 		flags = IORESOURCE_IO;
 		root = &ioport_resource;
···
 	resource = &info->res[info->res_num];
 	resource->name = info->name;
 	resource->flags = flags;
-	resource->start = addr.minimum + offset;
-	resource->end = resource->start + addr.address_length - 1;
+	resource->start = addr.address.minimum + offset;
+	resource->end = resource->start + addr.address.address_length - 1;
 	info->res_offset[info->res_num] = offset;
 
 	if (insert_resource(root, resource)) {

arch/x86/Kconfig

···
 	  things like clock tree (common clock framework) and pincontrol
 	  which are needed by the LPSS peripheral drivers.
 
+config X86_AMD_PLATFORM_DEVICE
+	bool "AMD ACPI2Platform devices support"
+	depends on ACPI
+	select COMMON_CLK
+	select PINCTRL
+	---help---
+	  Select to interpret AMD specific ACPI device to platform device
+	  such as I2C, UART, GPIO found on AMD Carrizo and later chipsets.
+	  I2C and UART depend on COMMON_CLK to set clock. GPIO driver is
+	  implemented under PINCTRL subsystem.
+
 config IOSF_MBI
 	tristate "Intel SoC IOSF Sideband support for SoC platforms"
 	depends on PCI

arch/x86/include/asm/pci_x86.h

···
 extern int (*pcibios_enable_irq)(struct pci_dev *dev);
 extern void (*pcibios_disable_irq)(struct pci_dev *dev);
 
-extern bool mp_should_keep_irq(struct device *dev);
-
 struct pci_raw_ops {
 	int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
 						int reg, int len, u32 *val);

arch/x86/include/uapi/asm/msr-index.h

···
 #define MSR_CC6_DEMOTION_POLICY_CONFIG	0x00000668
 #define MSR_MC6_DEMOTION_POLICY_CONFIG	0x00000669
 
+#define MSR_CORE_PERF_LIMIT_REASONS	0x00000690
+#define MSR_GFX_PERF_LIMIT_REASONS	0x000006B0
+#define MSR_RING_PERF_LIMIT_REASONS	0x000006B1
+
 /* Hardware P state interface */
 #define MSR_PPERF			0x0000064e
 #define MSR_PERF_LIMIT_REASONS		0x0000064f
···
 
 #define MSR_IA32_PERF_STATUS		0x00000198
 #define MSR_IA32_PERF_CTL		0x00000199
+#define INTEL_PERF_CTL_MASK		0xffff
 #define MSR_AMD_PSTATE_DEF_BASE		0xc0010064
 #define MSR_AMD_PERF_STATUS		0xc0010063
 #define MSR_AMD_PERF_CTL		0xc0010062

arch/x86/kernel/acpi/boot.c

···
 
 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 {
-	struct acpi_table_boot *sb;
-
-	sb = (struct acpi_table_boot *)table;
-	if (!sb) {
-		printk(KERN_WARNING PREFIX "Unable to map SBF\n");
-		return -ENODEV;
-	}
+	struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 
 	sbf_port = sb->cmos_index;	/* Save CMOS port */
 
···
 
 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 {
-	struct acpi_table_hpet *hpet_tbl;
-
-	hpet_tbl = (struct acpi_table_hpet *)table;
-	if (!hpet_tbl) {
-		printk(KERN_WARNING PREFIX "Unable to map HPET\n");
-		return -ENODEV;
-	}
+	struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 
 	if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 		printk(KERN_WARNING PREFIX "HPET timers must be located in "

arch/x86/pci/acpi.c

···
 struct pci_root_info {
 	struct acpi_device *bridge;
 	char name[16];
-	unsigned int res_num;
-	struct resource *res;
-	resource_size_t *res_offset;
 	struct pci_sysdata sd;
 #ifdef	CONFIG_PCI_MMCONFIG
 	bool mcfg_added;
···
 }
 #endif
 
-static acpi_status resource_to_addr(struct acpi_resource *resource,
-				    struct acpi_resource_address64 *addr)
+static void validate_resources(struct device *dev, struct list_head *crs_res,
+			       unsigned long type)
 {
-	acpi_status status;
-	struct acpi_resource_memory24 *memory24;
-	struct acpi_resource_memory32 *memory32;
-	struct acpi_resource_fixed_memory32 *fixed_memory32;
+	LIST_HEAD(list);
+	struct resource *res1, *res2, *root = NULL;
+	struct resource_entry *tmp, *entry, *entry2;
 
-	memset(addr, 0, sizeof(*addr));
-	switch (resource->type) {
-	case ACPI_RESOURCE_TYPE_MEMORY24:
-		memory24 = &resource->data.memory24;
-		addr->resource_type = ACPI_MEMORY_RANGE;
-		addr->minimum = memory24->minimum;
-		addr->address_length = memory24->address_length;
-		addr->maximum = addr->minimum + addr->address_length - 1;
-		return AE_OK;
-	case ACPI_RESOURCE_TYPE_MEMORY32:
-		memory32 = &resource->data.memory32;
-		addr->resource_type = ACPI_MEMORY_RANGE;
-		addr->minimum = memory32->minimum;
-		addr->address_length = memory32->address_length;
-		addr->maximum = addr->minimum + addr->address_length - 1;
-		return AE_OK;
-	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
-		fixed_memory32 = &resource->data.fixed_memory32;
-		addr->resource_type = ACPI_MEMORY_RANGE;
-		addr->minimum = fixed_memory32->address;
-		addr->address_length = fixed_memory32->address_length;
-		addr->maximum = addr->minimum + addr->address_length - 1;
-		return AE_OK;
-	case ACPI_RESOURCE_TYPE_ADDRESS16:
-	case ACPI_RESOURCE_TYPE_ADDRESS32:
-	case ACPI_RESOURCE_TYPE_ADDRESS64:
-		status = acpi_resource_to_address64(resource, addr);
-		if (ACPI_SUCCESS(status) &&
-		    (addr->resource_type == ACPI_MEMORY_RANGE ||
-		    addr->resource_type == ACPI_IO_RANGE) &&
-		    addr->address_length > 0) {
-			return AE_OK;
-		}
-		break;
-	}
-	return AE_ERROR;
-}
+	BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
+	root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
 
-static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
-{
-	struct pci_root_info *info = data;
-	struct acpi_resource_address64 addr;
-	acpi_status status;
+	list_splice_init(crs_res, &list);
+	resource_list_for_each_entry_safe(entry, tmp, &list) {
+		bool free = false;
+		resource_size_t end;
 
-	status = resource_to_addr(acpi_res, &addr);
-	if (ACPI_SUCCESS(status))
-		info->res_num++;
-	return AE_OK;
-}
-
-static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data)
-{
-	struct pci_root_info *info = data;
-	struct resource *res;
-	struct acpi_resource_address64 addr;
-	acpi_status status;
-	unsigned long flags;
-	u64 start, orig_end, end;
-
-	status = resource_to_addr(acpi_res, &addr);
-	if (!ACPI_SUCCESS(status))
-		return AE_OK;
-
-	if (addr.resource_type == ACPI_MEMORY_RANGE) {
-		flags = IORESOURCE_MEM;
-		if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
-			flags |= IORESOURCE_PREFETCH;
-	} else if (addr.resource_type == ACPI_IO_RANGE) {
-		flags = IORESOURCE_IO;
-	} else
-		return AE_OK;
-
-	start = addr.minimum + addr.translation_offset;
-	orig_end = end = addr.maximum + addr.translation_offset;
-
-	/* Exclude non-addressable range or non-addressable portion of range */
-	end = min(end, (u64)iomem_resource.end);
-	if (end <= start) {
-		dev_info(&info->bridge->dev,
-			"host bridge window [%#llx-%#llx] "
-			"(ignored, not CPU addressable)\n", start, orig_end);
-		return AE_OK;
-	} else if (orig_end != end) {
-		dev_info(&info->bridge->dev,
-			"host bridge window [%#llx-%#llx] "
-			"([%#llx-%#llx] ignored, not CPU addressable)\n", 
-			start, orig_end, end + 1, orig_end);
-	}
-
-	res = &info->res[info->res_num];
-	res->name = info->name;
-	res->flags = flags;
-	res->start = start;
-	res->end = end;
-	info->res_offset[info->res_num] = addr.translation_offset;
-	info->res_num++;
-
-	if (!pci_use_crs)
-		dev_printk(KERN_DEBUG, &info->bridge->dev,
-			   "host bridge window %pR (ignored)\n", res);
-
-	return AE_OK;
-}
-
-static void coalesce_windows(struct pci_root_info *info, unsigned long type)
-{
-	int i, j;
-	struct resource *res1, *res2;
-
-	for (i = 0; i < info->res_num; i++) {
-		res1 = &info->res[i];
+		res1 = entry->res;
 		if (!(res1->flags & type))
-			continue;
+			goto next;
 
-		for (j = i + 1; j < info->res_num; j++) {
-			res2 = &info->res[j];
+		/* Exclude non-addressable range or non-addressable portion */
+		end = min(res1->end, root->end);
+		if (end <= res1->start) {
+			dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
+				 res1);
+			free = true;
+			goto next;
+		} else if (res1->end != end) {
+			dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
+				 res1, (unsigned long long)end + 1,
+				 (unsigned long long)res1->end);
+			res1->end = end;
+		}
+
+		resource_list_for_each_entry(entry2, crs_res) {
+			res2 = entry2->res;
 			if (!(res2->flags & type))
 				continue;
 
···
 			if (resource_overlaps(res1, res2)) {
 				res2->start = min(res1->start, res2->start);
 				res2->end = max(res1->end, res2->end);
-				dev_info(&info->bridge->dev,
-					 "host bridge window expanded to %pR; %pR ignored\n",
+				dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
 					 res2, res1);
-				res1->flags = 0;
+				free = true;
+				goto next;
 			}
 		}
+
+next:
+		resource_list_del(entry);
+		if (free)
+			resource_list_free_entry(entry);
+		else
+			resource_list_add_tail(entry, crs_res);
 	}
 }
 
 static void add_resources(struct pci_root_info *info,
-			  struct list_head *resources)
+			  struct list_head *resources,
+			  struct list_head *crs_res)
 {
-	int i;
-	struct resource *res, *root, *conflict;
+	struct resource_entry *entry, *tmp;
+	struct resource *res, *conflict, *root = NULL;
 
-	coalesce_windows(info, IORESOURCE_MEM);
-	coalesce_windows(info, IORESOURCE_IO);
+	validate_resources(&info->bridge->dev, crs_res, IORESOURCE_MEM);
+	validate_resources(&info->bridge->dev, crs_res, IORESOURCE_IO);
 
-	for (i = 0; i < info->res_num; i++) {
-		res = &info->res[i];
-
+	resource_list_for_each_entry_safe(entry, tmp, crs_res) {
+		res = entry->res;
 		if (res->flags & IORESOURCE_MEM)
 			root = &iomem_resource;
 		else if (res->flags & IORESOURCE_IO)
 			root = &ioport_resource;
 		else
-			continue;
+			BUG_ON(res);
 
 		conflict = insert_resource_conflict(root, res);
-		if (conflict)
+		if (conflict) {
 			dev_info(&info->bridge->dev,
 				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
 				 res, conflict->name, conflict);
-		else
-			pci_add_resource_offset(resources, res,
-					info->res_offset[i]);
-	}
-}
-
-static void free_pci_root_info_res(struct pci_root_info *info)
-{
-	kfree(info->res);
-	info->res = NULL;
-	kfree(info->res_offset);
-	info->res_offset = NULL;
-	info->res_num = 0;
-}
-
-static void __release_pci_root_info(struct pci_root_info *info)
-{
-	int i;
-	struct resource *res;
-
-	for (i = 0; i < info->res_num; i++) {
-		res = &info->res[i];
-
-		if (!res->parent)
-			continue;
-
-		if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
-			continue;
-
-		release_resource(res);
+			resource_list_destroy_entry(entry);
+		}
 	}
 
-	free_pci_root_info_res(info);
-
-	teardown_mcfg_map(info);
-
-	kfree(info);
+	list_splice_tail(crs_res, resources);
 }
 
 static void release_pci_root_info(struct pci_host_bridge *bridge)
 {
+	struct resource *res;
+	struct resource_entry *entry;
 	struct pci_root_info *info = bridge->release_data;
 
-	__release_pci_root_info(info);
+	resource_list_for_each_entry(entry, &bridge->windows) {
+		res = entry->res;
+		if (res->parent &&
+		    (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+			release_resource(res);
+	}
+
+	teardown_mcfg_map(info);
+	kfree(info);
 }
 
 static void probe_pci_root_info(struct pci_root_info *info,
 				struct acpi_device *device,
-				int busnum, int domain)
+				int busnum, int domain,
+				struct list_head *list)
 {
-	size_t size;
+	int ret;
+	struct resource_entry *entry;
 
 	sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
 	info->bridge = device;
-
-	info->res_num = 0;
-	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
-				info);
-	if (!info->res_num)
-		return;
-
-	size = sizeof(*info->res) * info->res_num;
-	info->res = kzalloc_node(size, GFP_KERNEL, info->sd.node);
-	if (!info->res) {
-		info->res_num = 0;
-		return;
-	}
-
-	size = sizeof(*info->res_offset) * info->res_num;
-	info->res_num = 0;
-	info->res_offset = kzalloc_node(size, GFP_KERNEL, info->sd.node);
-	if (!info->res_offset) {
-		kfree(info->res);
-		info->res = NULL;
-		return;
-	}
-
-	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
-				info);
+	ret = acpi_dev_get_resources(device, list,
+				     acpi_dev_filter_resource_type_cb,
+				     (void *)(IORESOURCE_IO | IORESOURCE_MEM));
+	if (ret < 0)
+		dev_warn(&device->dev,
+			 "failed to parse _CRS method, error code %d\n", ret);
+	else if (ret == 0)
+		dev_dbg(&device->dev,
+			"no IO and memory resources present in _CRS\n");
+	else
+		resource_list_for_each_entry(entry, list)
+			entry->res->name = info->name;
 }
 
 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
···
 	struct pci_root_info *info;
 	int domain = root->segment;
 	int busnum = root->secondary.start;
+	struct resource_entry *res_entry;
+	LIST_HEAD(crs_res);
 	LIST_HEAD(resources);
 	struct pci_bus *bus;
 	struct pci_sysdata *sd;
···
 		memcpy(bus->sysdata, sd, sizeof(*sd));
 		kfree(info);
 	} else {
-		probe_pci_root_info(info, device, busnum, domain);
-
 		/* insert busn res at first */
 		pci_add_resource(&resources,  &root->secondary);
+
 		/*
 		 * _CRS with no apertures is normal, so only fall back to
 		 * defaults or native bridge info if we're ignoring _CRS.
 		 */
-		if (pci_use_crs)
-			add_resources(info, &resources);
-		else {
-			free_pci_root_info_res(info);
+		probe_pci_root_info(info, device, busnum, domain, &crs_res);
+		if (pci_use_crs) {
+			add_resources(info, &resources, &crs_res);
+		} else {
+			resource_list_for_each_entry(res_entry, &crs_res)
+				dev_printk(KERN_DEBUG, &device->dev,
+					   "host bridge window %pR (ignored)\n",
+					   res_entry->res);
+			resource_list_free(&crs_res);
 			x86_pci_root_bus_resources(busnum, &resources);
 		}
 
···
 				to_pci_host_bridge(bus->bridge),
 				release_pci_root_info, info);
 		} else {
-			pci_free_resource_list(&resources);
-			__release_pci_root_info(info);
+			resource_list_free(&resources);
+			teardown_mcfg_map(info);
+			kfree(info);
 		}
 	}
 

arch/x86/pci/bus_numa.c

···
 {
 	struct pci_root_info *info = x86_find_pci_root_info(bus);
 	struct pci_root_res *root_res;
-	struct pci_host_bridge_window *window;
+	struct resource_entry *window;
 	bool found = false;
 
 	if (!info)
···
 	       bus);
 
 	/* already added by acpi ? */
-	list_for_each_entry(window, resources, list)
+	resource_list_for_each_entry(window, resources)
 		if (window->res->flags & IORESOURCE_BUS) {
 			found = true;
 			break;

arch/x86/pci/common.c

···
 	}
 }
 
+/*
+ * Some device drivers assume dev->irq won't change after calling
+ * pci_disable_device(). So delay releasing of IRQ resource to driver
+ * unbinding time. Otherwise it will break PM subsystem and drivers
+ * like xen-pciback etc.
+ */
+static int pci_irq_notifier(struct notifier_block *nb, unsigned long action,
+			    void *data)
+{
+	struct pci_dev *dev = to_pci_dev(data);
+
+	if (action != BUS_NOTIFY_UNBOUND_DRIVER)
+		return NOTIFY_DONE;
+
+	if (pcibios_disable_irq)
+		pcibios_disable_irq(dev);
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block pci_irq_nb = {
+	.notifier_call = pci_irq_notifier,
+	.priority = INT_MIN,
+};
+
 int __init pcibios_init(void)
 {
 	if (!raw_pci_ops) {
···
 
 	if (pci_bf_sort >= pci_force_bf)
 		pci_sort_breadthfirst();
+
+	bus_register_notifier(&pci_bus_type, &pci_irq_nb);
+
 	return 0;
 }
 
···
 	if (!pci_dev_msi_enabled(dev))
 		return pcibios_enable_irq(dev);
 	return 0;
-}
-
-void pcibios_disable_device (struct pci_dev *dev)
-{
-	if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq)
-		pcibios_disable_irq(dev);
 }
 
 int pci_ext_cfg_avail(void)

arch/x86/pci/intel_mid_pci.c

···
 
 static void intel_mid_pci_irq_disable(struct pci_dev *dev)
 {
-	if (!mp_should_keep_irq(&dev->dev) && dev->irq_managed &&
-	    dev->irq > 0) {
+	if (dev->irq_managed && dev->irq > 0) {
 		mp_unmap_irq(dev->irq);
 		dev->irq_managed = 0;
+		dev->irq = 0;
 	}
 }
 

arch/x86/pci/irq.c

···
 	return 0;
 }
 
-bool mp_should_keep_irq(struct device *dev)
-{
-	if (dev->power.is_prepared)
-		return true;
-#ifdef CONFIG_PM
-	if (dev->power.runtime_status == RPM_SUSPENDING)
-		return true;
-#endif
-
-	return false;
-}
-
 static void pirq_disable_irq(struct pci_dev *dev)
 {
-	if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
-	    dev->irq_managed && dev->irq) {
+	if (io_apic_assign_pci_irqs && dev->irq_managed && dev->irq) {
 		mp_unmap_irq(dev->irq);
 		dev->irq = 0;
 		dev->irq_managed = 0;

arch/x86/pci/mmconfig-shared.c

···
 
 	status = acpi_resource_to_address64(res, &address);
 	if (ACPI_FAILURE(status) ||
-	   (address.address_length <= 0) ||
+	   (address.address.address_length <= 0) ||
 	   (address.resource_type != ACPI_MEMORY_RANGE))
 		return AE_OK;
 
-	if ((mcfg_res->start >= address.minimum) &&
-	    (mcfg_res->end < (address.minimum + address.address_length))) {
+	if ((mcfg_res->start >= address.address.minimum) &&
+	    (mcfg_res->end < (address.address.minimum + address.address.address_length))) {
 		mcfg_res->flags = 1;
 		return AE_CTRL_TERMINATE;
 	}

drivers/acpi/Kconfig

···
 	  To compile this driver as a module, choose M here:
 	  the module will be called acpi_memhotplug.
 
+config ACPI_HOTPLUG_IOAPIC
+	bool
+	depends on PCI
+	depends on X86_IO_APIC
+	default y
+
 config ACPI_SBS
 	tristate "Smart Battery System"
 	depends on X86

drivers/acpi/Makefile

···
 acpi-y				+= ec.o
 acpi-$(CONFIG_ACPI_DOCK)	+= dock.o
 acpi-y				+= pci_root.o pci_link.o pci_irq.o
-acpi-y				+= acpi_lpss.o
+acpi-y				+= acpi_lpss.o acpi_apd.o
 acpi-y				+= acpi_platform.o
 acpi-y				+= acpi_pnp.o
 acpi-y				+= int340x_thermal.o
···
 obj-y				+= container.o
 obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
 obj-y				+= acpi_memhotplug.o
+obj-$(CONFIG_ACPI_HOTPLUG_IOAPIC) += ioapic.o
 obj-$(CONFIG_ACPI_BATTERY)	+= battery.o
 obj-$(CONFIG_ACPI_SBS)		+= sbshc.o
 obj-$(CONFIG_ACPI_SBS)		+= sbs.o

drivers/acpi/acpi_apd.c

···
+/*
+ * AMD ACPI support for ACPI2platform device.
+ *
+ * Copyright (c) 2014,2015 AMD Corporation.
+ * Authors: Ken Xue <[e-mail]>
+ *	Wu, Jeff <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/clkdev.h>
+#include <linux/acpi.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/pm.h>
+
+#include "internal.h"
+
+ACPI_MODULE_NAME("acpi_apd");
+struct apd_private_data;
+
+/**
+ * ACPI_APD_SYSFS : add device attributes in sysfs
+ * ACPI_APD_PM : attach power domain to device
+ */
+#define ACPI_APD_SYSFS	BIT(0)
+#define ACPI_APD_PM	BIT(1)
+
+/**
+ * struct apd_device_desc - a descriptor for apd device
+ * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
+ * @fixed_clk_rate: fixed rate input clock source for acpi device;
+ *			0 means no fixed rate input clock source
+ * @setup: a hook routine to set device resource during create platform device
+ *
+ * Device description defined as acpi_device_id.driver_data
+ */
+struct apd_device_desc {
+	unsigned int flags;
+	unsigned int fixed_clk_rate;
+	int (*setup)(struct apd_private_data *pdata);
+};
+
+struct apd_private_data {
+	struct clk *clk;
+	struct acpi_device *adev;
+	const struct apd_device_desc *dev_desc;
+};
+
+#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
+#define APD_ADDR(desc)	((unsigned long)&desc)
+
+static int acpi_apd_setup(struct apd_private_data *pdata)
+{
+	const struct apd_device_desc *dev_desc = pdata->dev_desc;
+	struct clk *clk = ERR_PTR(-ENODEV);
+
+	if (dev_desc->fixed_clk_rate) {
+		clk = clk_register_fixed_rate(&pdata->adev->dev,
+					dev_name(&pdata->adev->dev),
+					NULL, CLK_IS_ROOT,
+					dev_desc->fixed_clk_rate);
+		clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
+		pdata->clk = clk;
+	}
+
+	return 0;
+}
+
+static struct apd_device_desc cz_i2c_desc = {
+	.setup = acpi_apd_setup,
+	.fixed_clk_rate = 133000000,
+};
+
+static struct apd_device_desc cz_uart_desc = {
+	.setup = acpi_apd_setup,
+	.fixed_clk_rate = 48000000,
+};
+
+#else
+
+#define APD_ADDR(desc) (0UL)
+
+#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
+
+/**
+* Create platform device during acpi scan attach handle.
+* Return value > 0 on success of creating device.
+*/
+static int acpi_apd_create_device(struct acpi_device *adev,
+				   const struct acpi_device_id *id)
+{
+	const struct apd_device_desc *dev_desc = (void *)id->driver_data;
+	struct apd_private_data *pdata;
+	struct platform_device *pdev;
+	int ret;
+
+	if (!dev_desc) {
+		pdev = acpi_create_platform_device(adev);
+		return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
+	}
+
+	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	pdata->adev = adev;
+	pdata->dev_desc = dev_desc;
+
+	if (dev_desc->setup) {
+		ret = dev_desc->setup(pdata);
+		if (ret)
+			goto err_out;
+	}
+
+	adev->driver_data = pdata;
+	pdev = acpi_create_platform_device(adev);
+	if (!IS_ERR_OR_NULL(pdev))
+		return 1;
+
+	ret = PTR_ERR(pdev);
+	adev->driver_data = NULL;
+
+ err_out:
+	kfree(pdata);
+	return ret;
+}
+
+static const struct acpi_device_id acpi_apd_device_ids[] = {
+	/* Generic apd devices */
+	{ "AMD0010", APD_ADDR(cz_i2c_desc) },
+	{ "AMD0020", APD_ADDR(cz_uart_desc) },
+	{ "AMD0030", },
+	{ }
+};
+
+static struct acpi_scan_handler apd_handler = {
+	.ids = acpi_apd_device_ids,
+	.attach = acpi_apd_create_device,
+};
+
+void __init acpi_apd_init(void)
+{
+	acpi_scan_add_handler(&apd_handler);
+}

drivers/acpi/acpi_lpss.c

···
 };
 
 static struct lpss_device_desc lpt_i2c_dev_desc = {
-	.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_LTR,
+	.flags = LPSS_CLK | LPSS_LTR,
 	.prv_offset = 0x800,
 };
 
···
 {
 	struct lpss_device_desc *dev_desc;
 	struct lpss_private_data *pdata;
-	struct resource_list_entry *rentry;
+	struct resource_entry *rentry;
 	struct list_head resource_list;
 	struct platform_device *pdev;
 	int ret;
···
 		goto err_out;
 
 	list_for_each_entry(rentry, &resource_list, node)
-		if (resource_type(&rentry->res) == IORESOURCE_MEM) {
+		if (resource_type(rentry->res) == IORESOURCE_MEM) {
 			if (dev_desc->prv_size_override)
 				pdata->mmio_size = dev_desc->prv_size_override;
 			else
-				pdata->mmio_size = resource_size(&rentry->res);
-			pdata->mmio_base = ioremap(rentry->res.start,
+				pdata->mmio_size = resource_size(rentry->res);
+			pdata->mmio_base = ioremap(rentry->res->start,
 						   pdata->mmio_size);
+			if (!pdata->mmio_base)
+				goto err_out;
 			break;
 		}
 

drivers/acpi/acpi_memhotplug.c

···
 		/* Can we combine the resource range information? */
 		if ((info->caching == address64.info.mem.caching) &&
 		    (info->write_protect == address64.info.mem.write_protect) &&
-		    (info->start_addr + info->length == address64.minimum)) {
-			info->length += address64.address_length;
+		    (info->start_addr + info->length == address64.address.minimum)) {
+			info->length += address64.address.address_length;
 			return AE_OK;
 		}
 	}
···
 	INIT_LIST_HEAD(&new->list);
 	new->caching = address64.info.mem.caching;
 	new->write_protect = address64.info.mem.write_protect;
-	new->start_addr = address64.minimum;
-	new->length = address64.address_length;
+	new->start_addr = address64.address.minimum;
+	new->length = address64.address.address_length;
 	list_add_tail(&new->list, &mem_device->res_list);
 
 	return AE_OK;

drivers/acpi/acpi_platform.c

···
 	struct platform_device *pdev = NULL;
 	struct acpi_device *acpi_parent;
 	struct platform_device_info pdevinfo;
-	struct resource_list_entry *rentry;
+	struct resource_entry *rentry;
 	struct list_head resource_list;
 	struct resource *resources = NULL;
 	int count;
···
 		}
 		count = 0;
 		list_for_each_entry(rentry, &resource_list, node)
-			resources[count++] = rentry->res;
+			resources[count++] = *rentry->res;
 
 		acpi_dev_free_resource_list(&resource_list);
 	}

drivers/acpi/acpica/acapps.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 /* Common info for tool signons */
 
 #define ACPICA_NAME                 "Intel ACPI Component Architecture"
-#define ACPICA_COPYRIGHT            "Copyright (c) 2000 - 2014 Intel Corporation"
+#define ACPICA_COPYRIGHT            "Copyright (c) 2000 - 2015 Intel Corporation"
 
 #if ACPI_MACHINE_WIDTH == 64
 #define ACPI_WIDTH          "-64"

drivers/acpi/acpica/accommon.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acdebug.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acdispat.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acevents.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
  */
 acpi_status
 acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
-
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
 
 acpi_status
 acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,

drivers/acpi/acpica/acglobal.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/achware.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acinterp.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/aclocal.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acmacros.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acnamesp.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acobject.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acopcode.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acparser.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acpredef.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acresrc.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acstruct.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/actables.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/acutils.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/amlcode.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/amlresrc.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsargs.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dscontrol.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsfield.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsinit.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsmethod.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsmthdat.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsobject.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsopcode.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dsutils.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dswexec.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dswload.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dswload2.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dswscope.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/dswstate.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evevent.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evglock.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evgpe.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 	acpi_status status;
 
 	ACPI_FUNCTION_TRACE(ev_enable_gpe);
-
-	/*
-	 * We will only allow a GPE to be enabled if it has either an associated
-	 * method (_Lxx/_Exx) or a handler, or is using the implicit notify
-	 * feature. Otherwise, the GPE will be immediately disabled by
-	 * acpi_ev_gpe_dispatch the first time it fires.
-	 */
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-	    ACPI_GPE_DISPATCH_NONE) {
-		return_ACPI_STATUS(AE_NO_HANDLER);
-	}
 
 	/* Clear the GPE (of stale events) */
 
···
 {
 	acpi_status status;
 	struct acpi_gpe_block_info *gpe_block;
+	struct acpi_namespace_node *gpe_device;
 	struct acpi_gpe_register_info *gpe_register_info;
+	struct acpi_gpe_event_info *gpe_event_info;
+	u32 gpe_number;
+	struct acpi_gpe_handler_info *gpe_handler_info;
 	u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
 	u8 enabled_status_byte;
 	u32 status_reg;
···
 
 	gpe_block = gpe_xrupt_list->gpe_block_list_head;
 	while (gpe_block) {
+		gpe_device = gpe_block->node;
+
 		/*
 		 * Read all of the 8-bit GPE status and enable registers in this GPE
 		 * block, saving all of them. Find all currently active GP events.
···
 
 				/* Examine one GPE bit */
 
+				gpe_event_info =
+				    &gpe_block->
+				    event_info[((acpi_size) i *
+						ACPI_GPE_REGISTER_WIDTH) + j];
+				gpe_number =
+				    j + gpe_register_info->base_gpe_number;
+
 				if (enabled_status_byte & (1 << j)) {
-					/*
-					 * Found an active GPE. Dispatch the event to a handler
-					 * or method.
-					 */
-					int_status |=
-					    acpi_ev_gpe_dispatch(gpe_block->
-								 node,
-								 &gpe_block->
-								 event_info[((acpi_size) i * ACPI_GPE_REGISTER_WIDTH) + j], j + gpe_register_info->base_gpe_number);
+
+					/* Invoke global event handler if present */
+
+					acpi_gpe_count++;
+					if (acpi_gbl_global_event_handler) {
+						acpi_gbl_global_event_handler
+						    (ACPI_EVENT_TYPE_GPE,
+						     gpe_device, gpe_number,
+						     acpi_gbl_global_event_handler_context);
+					}
+
+					/* Found an active GPE */
+
+					if (ACPI_GPE_DISPATCH_TYPE
+					    (gpe_event_info->flags) ==
+					    ACPI_GPE_DISPATCH_RAW_HANDLER) {
+
+						/* Dispatch the event to a raw handler */
+
+						gpe_handler_info =
+						    gpe_event_info->dispatch.
+						    handler;
+
+						/*
+						 * There is no protection around the namespace node
+						 * and the GPE handler to ensure a safe destruction
+						 * because:
+						 * 1. The namespace node is expected to always
+						 *    exist after loading a table.
+						 * 2. The GPE handler is expected to be flushed by
+						 *    acpi_os_wait_events_complete() before the
+						 *    destruction.
+						 */
+						acpi_os_release_lock
+						    (acpi_gbl_gpe_lock, flags);
+						int_status |=
+						    gpe_handler_info->
+						    address(gpe_device,
+							    gpe_number,
+							    gpe_handler_info->
+							    context);
+						flags =
+						    acpi_os_acquire_lock
+						    (acpi_gbl_gpe_lock);
+					} else {
+						/*
+						 * Dispatch the event to a standard handler or
+						 * method.
+						 */
+						int_status |=
+						    acpi_ev_gpe_dispatch
+						    (gpe_device, gpe_event_info,
+						     gpe_number);
+					}
 				}
 			}
 		}
···
 static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
 {
 	struct acpi_gpe_event_info *gpe_event_info = context;
-	acpi_status status;
-	struct acpi_gpe_event_info *local_gpe_event_info;
+	acpi_status status = AE_OK;
 	struct acpi_evaluate_info *info;
 	struct acpi_gpe_notify_info *notify;
 
 	ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
 
-	/* Allocate a local GPE block */
-
-	local_gpe_event_info =
-	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_event_info));
-	if (!local_gpe_event_info) {
-		ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "while handling a GPE"));
-		return_VOID;
-	}
-
-	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-	if (ACPI_FAILURE(status)) {
-		ACPI_FREE(local_gpe_event_info);
-		return_VOID;
-	}
-
-	/* Must revalidate the gpe_number/gpe_block */
-
-	if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
-		status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-		ACPI_FREE(local_gpe_event_info);
-		return_VOID;
-	}
-
-	/*
-	 * Take a snapshot of the GPE info for this level - we copy the info to
-	 * prevent a race condition with remove_handler/remove_block.
-	 */
-	ACPI_MEMCPY(local_gpe_event_info, gpe_event_info,
-		    sizeof(struct acpi_gpe_event_info));
-
-	status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-	if (ACPI_FAILURE(status)) {
-		ACPI_FREE(local_gpe_event_info);
-		return_VOID;
-	}
-
 	/* Do the correct dispatch - normal method or implicit notify */
 
-	switch (local_gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
+	switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) {
 	case ACPI_GPE_DISPATCH_NOTIFY:
 		/*
 		 * Implicit notify.
···
 		 * June 2012: Expand implicit notify mechanism to support
 		 * notifies on multiple device objects.
 		 */
-		notify = local_gpe_event_info->dispatch.notify_list;
+		notify = gpe_event_info->dispatch.notify_list;
 		while (ACPI_SUCCESS(status) && notify) {
 			status =
 			    acpi_ev_queue_notify_request(notify->device_node,
···
 			 * _Lxx/_Exx control method that corresponds to this GPE
 			 */
 			info->prefix_node =
-			    local_gpe_event_info->dispatch.method_node;
+			    gpe_event_info->dispatch.method_node;
 			info->flags = ACPI_IGNORE_RETURN_VALUE;
 
 			status = acpi_ns_evaluate(info);
···
 		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, status,
 					"while evaluating GPE method [%4.4s]",
-					acpi_ut_get_node_name
-					(local_gpe_event_info->dispatch.
-					 method_node)));
+					acpi_ut_get_node_name(gpe_event_info->
+							      dispatch.
+							      method_node)));
 		}
 		break;
 
 	default:
 
-		return_VOID;	/* Should never happen */
+		goto error_exit;	/* Should never happen */
 	}
 
 	/* Defer enabling of GPE until all notify handlers are done */
 
 	status = acpi_os_execute(OSL_NOTIFY_HANDLER,
-				 acpi_ev_asynch_enable_gpe,
-				 local_gpe_event_info);
-	if (ACPI_FAILURE(status)) {
-		ACPI_FREE(local_gpe_event_info);
+				 acpi_ev_asynch_enable_gpe, gpe_event_info);
+	if (ACPI_SUCCESS(status)) {
+		return_VOID;
 	}
+
+error_exit:
+	acpi_ev_asynch_enable_gpe(gpe_event_info);
 	return_VOID;
 }
 
···
 	(void)acpi_ev_finish_gpe(gpe_event_info);
 	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 
-	ACPI_FREE(gpe_event_info);
 	return;
 }
 
···
 
 	ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
 
-	/* Invoke global event handler if present */
-
-	acpi_gpe_count++;
-	if (acpi_gbl_global_event_handler) {
-		acpi_gbl_global_event_handler(ACPI_EVENT_TYPE_GPE, gpe_device,
-					      gpe_number,
-					      acpi_gbl_global_event_handler_context);
-	}
-
 	/*
 	 * Always disable the GPE so that it does not keep firing before
 	 * any asynchronous activity completes (either from the execution
···
 	 * If there is neither a handler nor a method, leave the GPE
 	 * disabled.
 	 */
-	switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
+	switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) {
 	case ACPI_GPE_DISPATCH_HANDLER:
 
 		/* Invoke the installed handler (at interrupt level) */

drivers/acpi/acpica/evgpeblk.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 			 * Ignore GPEs that have no corresponding _Lxx/_Exx method
 			 * and GPEs that are used to wake the system
 			 */
-			if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+			if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
 			     ACPI_GPE_DISPATCH_NONE)
-			    || ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
-				== ACPI_GPE_DISPATCH_HANDLER)
+			    || (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+				ACPI_GPE_DISPATCH_HANDLER)
+			    || (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+				ACPI_GPE_DISPATCH_RAW_HANDLER)
 			    || (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
 				continue;
 			}

drivers/acpi/acpica/evgpeinit.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 		return_ACPI_STATUS(AE_OK);
 	}
 
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-	    ACPI_GPE_DISPATCH_HANDLER) {
+	if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+	     ACPI_GPE_DISPATCH_HANDLER) ||
+	    (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+	     ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 
 		/* If there is already a handler, ignore this GPE method */
 
 		return_ACPI_STATUS(AE_OK);
 	}
 
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
 	    ACPI_GPE_DISPATCH_METHOD) {
 		/*
 		 * If there is already a method, ignore this method. But check

drivers/acpi/acpica/evgpeutil.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 unlock_and_exit:
 	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 	return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_valid_gpe_event
- *
- * PARAMETERS:  gpe_event_info              - Info for this GPE
- *
- * RETURN:      TRUE if the gpe_event is valid
- *
- * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
- *              Should be called only when the GPE lists are semaphore locked
- *              and not subject to change.
- *
- ******************************************************************************/
-
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
-{
-	struct acpi_gpe_xrupt_info *gpe_xrupt_block;
-	struct acpi_gpe_block_info *gpe_block;
-
-	ACPI_FUNCTION_ENTRY();
-
-	/* No need for spin lock since we are not changing any list elements */
-
-	/* Walk the GPE interrupt levels */
-
-	gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
-	while (gpe_xrupt_block) {
-		gpe_block = gpe_xrupt_block->gpe_block_list_head;
-
-		/* Walk the GPE blocks on this interrupt level */
-
-		while (gpe_block) {
-			if ((&gpe_block->event_info[0] <= gpe_event_info) &&
-			    (&gpe_block->event_info[gpe_block->gpe_count] >
-			     gpe_event_info)) {
-				return (TRUE);
-			}
-
-			gpe_block = gpe_block->next;
-		}
-
-		gpe_xrupt_block = gpe_xrupt_block->next;
-	}
-
-	return (FALSE);
 }
 
 /*******************************************************************************
···
 								 ACPI_GPE_REGISTER_WIDTH)
 								+ j];
 
-			if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-			    ACPI_GPE_DISPATCH_HANDLER) {
+			if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+			     ACPI_GPE_DISPATCH_HANDLER) ||
+			    (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+			     ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 
 				/* Delete an installed handler block */
 
···
 				gpe_event_info->dispatch.handler = NULL;
 				gpe_event_info->flags &=
 				    ~ACPI_GPE_DISPATCH_MASK;
-			} else
-			    if ((gpe_event_info->
-				 flags & ACPI_GPE_DISPATCH_MASK) ==
-				ACPI_GPE_DISPATCH_NOTIFY) {
+			} else if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)
+				   == ACPI_GPE_DISPATCH_NOTIFY) {
 
 				/* Delete the implicit notification device list */
 

drivers/acpi/acpica/evhandler.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evmisc.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evregion.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evrgnini.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evsci.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evxface.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evxface")
+#if (!ACPI_REDUCED_HARDWARE)
+/* Local prototypes */
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+			    u32 gpe_number,
+			    u32 type,
+			    u8 is_raw_handler,
+			    acpi_gpe_handler address, void *context);
+
+#endif
 
 
 /*******************************************************************************
···
  *              handlers.
  *
  ******************************************************************************/
+
 acpi_status
 acpi_install_notify_handler(acpi_handle device,
 			    u32 handler_type,
···
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_install_gpe_handler
+ * FUNCTION:    acpi_ev_install_gpe_handler
  *
  * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
  *                                defined GPEs)
  *              gpe_number      - The GPE number within the GPE block
  *              type            - Whether this GPE should be treated as an
  *                                edge- or level-triggered interrupt.
+ *              is_raw_handler  - Whether this GPE should be handled using
+ *                                the special GPE handler mode.
  *              address         - Address of the handler
  *              context         - Value passed to the handler on each GPE
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Install a handler for a General Purpose Event.
+ * DESCRIPTION: Internal function to install a handler for a General Purpose
+ *              Event.
  *
  ******************************************************************************/
-acpi_status
-acpi_install_gpe_handler(acpi_handle gpe_device,
-			 u32 gpe_number,
-			 u32 type, acpi_gpe_handler address, void *context)
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+			    u32 gpe_number,
+			    u32 type,
+			    u8 is_raw_handler,
+			    acpi_gpe_handler address, void *context)
 {
 	struct acpi_gpe_event_info *gpe_event_info;
 	struct acpi_gpe_handler_info *handler;
 	acpi_status status;
 	acpi_cpu_flags flags;
 
-	ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+	ACPI_FUNCTION_TRACE(ev_install_gpe_handler);
 
 	/* Parameter validation */
 
···
 
 	/* Make sure that there isn't a handler there already */
 
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-	    ACPI_GPE_DISPATCH_HANDLER) {
+	if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+	     ACPI_GPE_DISPATCH_HANDLER) ||
+	    (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+	     ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 		status = AE_ALREADY_EXISTS;
 		goto free_and_exit;
 	}
···
 	 * automatically during initialization, in which case it has to be
 	 * disabled now to avoid spurious execution of the handler.
 	 */
-	if (((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) ||
-	     (handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) &&
-	    gpe_event_info->runtime_count) {
+	if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_METHOD) ||
+	     (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) {
 		handler->originally_enabled = TRUE;
 		(void)acpi_ev_remove_gpe_reference(gpe_event_info);
 
···
 
 	gpe_event_info->flags &=
 	    ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
-	gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_HANDLER);
+	gpe_event_info->flags |=
+	    (u8)(type |
+		 (is_raw_handler ? ACPI_GPE_DISPATCH_RAW_HANDLER :
+		  ACPI_GPE_DISPATCH_HANDLER));
 
 	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 
···
 	goto unlock_and_exit;
 }
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_handler(acpi_handle gpe_device,
+			 u32 gpe_number,
+			 u32 type, acpi_gpe_handler address, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+
+	status =
+	    acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, FALSE,
+					address, context);
+
+	return_ACPI_STATUS(status);
+}
+
 ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_raw_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_gpe_raw_handler(acpi_handle gpe_device,
+			     u32 gpe_number,
+			     u32 type, acpi_gpe_handler address, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_gpe_raw_handler);
+
+	status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, TRUE,
+					     address, context);
+
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_gpe_raw_handler)
 
 /*******************************************************************************
  *
···
 
 	/* Make sure that a handler is indeed installed */
 
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) !=
-	    ACPI_GPE_DISPATCH_HANDLER) {
+	if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+	     ACPI_GPE_DISPATCH_HANDLER) &&
+	    (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+	     ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 		status = AE_NOT_EXIST;
 		goto unlock_and_exit;
 	}
···
 	/* Remove the handler */
 
 	handler = gpe_event_info->dispatch.handler;
+	gpe_event_info->dispatch.handler = NULL;
 
 	/* Restore Method node (if any), set dispatch flags */
 
···
 	 * enabled, it should be enabled at this point to restore the
 	 * post-initialization configuration.
 	 */
-	if (((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) ||
-	     (handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) &&
-	    handler->originally_enabled) {
+	if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_METHOD) ||
+	     (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+	      ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) {
 		(void)acpi_ev_add_gpe_reference(gpe_event_info);
 	}
 

drivers/acpi/acpica/evxfevnt.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/evxfgpe.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 	 */
 	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
 	if (gpe_event_info) {
-		if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) !=
+		if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
 		    ACPI_GPE_DISPATCH_NONE) {
 			status = acpi_ev_add_gpe_reference(gpe_event_info);
 		} else {
···
 
 ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_set_gpe
+ *
+ * PARAMETERS:  gpe_device          - Parent GPE Device. NULL for GPE0/GPE1
+ *              gpe_number          - GPE level within the GPE block
+ *              action              - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
+ *              the reference count mechanism used in the acpi_enable_gpe(),
+ *              acpi_disable_gpe() interfaces.
+ *              This API is typically used by the GPE raw handler mode driver
+ *              to switch between the polling mode and the interrupt mode after
+ *              the driver has enabled the GPE.
+ *              The APIs should be invoked in this order:
+ *               acpi_enable_gpe()            <- Ensure the reference count > 0
+ *               acpi_set_gpe(ACPI_GPE_DISABLE) <- Enter polling mode
+ *               acpi_set_gpe(ACPI_GPE_ENABLE) <- Leave polling mode
+ *               acpi_disable_gpe()           <- Decrease the reference count
+ *
+ * Note: If a GPE is shared by 2 silicon components, then both the drivers
+ *       should support GPE polling mode or disabling the GPE for long period
+ *       for one driver may break the other. So use it with care since all
+ *       firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode.
+ *
+ ******************************************************************************/
+acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
+{
+	struct acpi_gpe_event_info *gpe_event_info;
+	acpi_status status;
+	acpi_cpu_flags flags;
+
+	ACPI_FUNCTION_TRACE(acpi_set_gpe);
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Perform the action */
+
+	switch (action) {
+	case ACPI_GPE_ENABLE:
+
+		status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
+		break;
+
+	case ACPI_GPE_DISABLE:
+
+		status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
+		break;
+
+	default:
+
+		status = AE_BAD_PARAMETER;
+		break;
+	}
+
+unlock_and_exit:
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_set_gpe)
 
 /*******************************************************************************
  *
···
 	 * known as an "implicit notify". Note: The GPE is assumed to be
 	 * level-triggered (for windows compatibility).
 	 */
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
 	    ACPI_GPE_DISPATCH_NONE) {
 		/*
 		 * This is the first device for implicit notify on this GPE.
···
 	 * If we already have an implicit notify on this GPE, add
 	 * this device to the notify list.
 	 */
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
 	    ACPI_GPE_DISPATCH_NOTIFY) {
 
 		/* Ensure that the device is not already in the list */
···
 
 ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_finish_gpe
+ *
+ * PARAMETERS:  gpe_device          - Namespace node for the GPE Block
+ *                                    (NULL for FADT defined GPEs)
+ *              gpe_number          - GPE level within the GPE block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
+ *              processing. Intended for use by asynchronous host-installed
+ *              GPE handlers. The GPE is only reenabled if the enable_for_run bit
+ *              is set in the GPE info.
+ *
+ ******************************************************************************/
+acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number)
+{
+	struct acpi_gpe_event_info *gpe_event_info;
+	acpi_status status;
+	acpi_cpu_flags flags;
+
+	ACPI_FUNCTION_TRACE(acpi_finish_gpe);
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	status = acpi_ev_finish_gpe(gpe_event_info);
+
+unlock_and_exit:
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_finish_gpe)
+
 /******************************************************************************
  *
  * FUNCTION:    acpi_disable_all_gpes
···
  *              all GPE blocks.
  *
  ******************************************************************************/
-
 acpi_status acpi_enable_all_wakeup_gpes(void)
 {
 	acpi_status status;

drivers/acpi/acpica/evxfregn.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exconfig.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exconvrt.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/excreate.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exdebug.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exdump.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exfield.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exfldio.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exmisc.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exmutex.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exnames.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exoparg1.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exoparg2.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exoparg3.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exoparg6.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exprep.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exregion.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exresnte.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exresolv.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exresop.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exstore.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exstoren.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exstorob.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exsystem.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/exutils.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwacpi.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwesleep.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwgpe.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
 				struct acpi_gpe_block_info *gpe_block,
 				void *context);
+
+static acpi_status
+acpi_hw_gpe_enable_write(u8 enable_mask,
+			 struct acpi_gpe_register_info *gpe_register_info);
 
 /******************************************************************************
  *
···
 
 	status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
 	if (ACPI_SUCCESS(status) && (action & ACPI_GPE_SAVE_MASK)) {
-		gpe_register_info->enable_mask = enable_mask;
+		gpe_register_info->enable_mask = (u8)enable_mask;
 	}
 	return (status);
 }
···
 
 	/* GPE currently handled? */
 
-	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) !=
+	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
 	    ACPI_GPE_DISPATCH_NONE) {
 		local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
 	}

drivers/acpi/acpica/hwpci.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwregs.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwsleep.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwtimer.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwvalid.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwxface.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/hwxfsleep.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsaccess.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsalloc.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsarguments.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsconvert.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsdump.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsdumpdv.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nseval.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsinit.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsload.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsnames.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsobject.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsparse.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nspredef.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsprepkg.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsrepair.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsrepair2.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nssearch.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsutils.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nswalk.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsxfeval.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsxfname.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/nsxfobj.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nsxfobj")
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_get_id
- *
- * PARAMETERS:  Handle          - Handle of object whose id is desired
- *              ret_id          - Where the id will be placed
- *
- * RETURN:      Status
- *
- * DESCRIPTION: This routine returns the owner id associated with a handle
- *
- ******************************************************************************/
-acpi_status acpi_get_id(acpi_handle handle, acpi_owner_id * ret_id)
-{
-	struct acpi_namespace_node *node;
-	acpi_status status;
-
-	/* Parameter Validation */
-
-	if (!ret_id) {
-		return (AE_BAD_PARAMETER);
-	}
-
-	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-	if (ACPI_FAILURE(status)) {
-		return (status);
-	}
-
-	/* Convert and validate the handle */
-
-	node = acpi_ns_validate_handle(handle);
-	if (!node) {
-		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-		return (AE_BAD_PARAMETER);
-	}
-
-	*ret_id = node->owner_id;
-
-	status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-	return (status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_get_id)
 
 /*******************************************************************************
  *

drivers/acpi/acpica/psargs.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psloop.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psobject.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psopcode.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psopinfo.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psparse.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psscope.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/pstree.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psutils.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/pswalk.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/psxface.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsaddr.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 	 * Address Translation Offset
 	 * Address Length
 	 */
-	{ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.address16.granularity),
+	{ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.address16.address.granularity),
 	 AML_OFFSET(address16.granularity),
 	 5},
 
···
 	 * Address Translation Offset
 	 * Address Length
 	 */
-	{ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.address32.granularity),
+	{ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.address32.address.granularity),
 	 AML_OFFSET(address32.granularity),
 	 5},
 
···
 	 * Address Translation Offset
 	 * Address Length
 	 */
-	{ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.address64.granularity),
+	{ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.address64.address.granularity),
 	 AML_OFFSET(address64.granularity),
 	 5},
 
···
 	 * Address Length
 	 * Type-Specific Attribute
 	 */
-	{ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.ext_address64.granularity),
+	{ACPI_RSC_MOVE64,
+	 ACPI_RS_OFFSET(data.ext_address64.address.granularity),
 	 AML_OFFSET(ext_address64.granularity),
 	 6}
 };

drivers/acpi/acpica/rscalc.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rscreate.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsdump.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsdumpinfo.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 	{ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_address16),
 	 "16-Bit WORD Address Space", NULL},
 	{ACPI_RSD_ADDRESS, 0, NULL, NULL},
-	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.granularity), "Granularity",
-	 NULL},
-	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.minimum), "Address Minimum",
-	 NULL},
-	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.maximum), "Address Maximum",
-	 NULL},
-	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.translation_offset),
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.granularity),
+	 "Granularity", NULL},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.minimum),
+	 "Address Minimum", NULL},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.maximum),
+	 "Address Maximum", NULL},
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.translation_offset),
 	 "Translation Offset", NULL},
-	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address_length),
+	{ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.address_length),
 	 "Address Length", NULL},
 	{ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(address16.resource_source), NULL, NULL}
 };
···
 	{ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_address32),
 	 "32-Bit DWORD Address Space", NULL},
 	{ACPI_RSD_ADDRESS, 0, NULL, NULL},
-	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.granularity), "Granularity",
-	 NULL},
-	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.minimum), "Address Minimum",
-	 NULL},
-	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.maximum), "Address Maximum",
-	 NULL},
-	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.translation_offset),
+	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.granularity),
+	 "Granularity", NULL},
+	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.minimum),
+	 "Address Minimum", NULL},
+	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.maximum),
+	 "Address Maximum", NULL},
+	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.translation_offset),
 	 "Translation Offset", NULL},
-	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address_length),
+	{ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.address_length),
 	 "Address Length", NULL},
 	{ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(address32.resource_source), NULL, NULL}
 };
···
 	{ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_address64),
 	 "64-Bit QWORD Address Space", NULL},
 	{ACPI_RSD_ADDRESS, 0, NULL, NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.granularity), "Granularity",
-	 NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.minimum), "Address Minimum",
-	 NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.maximum), "Address Maximum",
-	 NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.translation_offset),
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.granularity),
+	 "Granularity", NULL},
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.minimum),
+	 "Address Minimum", NULL},
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.maximum),
+	 "Address Maximum", NULL},
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.translation_offset),
 	 "Translation Offset", NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address_length),
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.address_length),
 	 "Address Length", NULL},
 	{ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(address64.resource_source), NULL, NULL}
 };
···
 	{ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_ext_address64),
 	 "64-Bit Extended Address Space", NULL},
 	{ACPI_RSD_ADDRESS, 0, NULL, NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.granularity),
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.granularity),
 	 "Granularity", NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.minimum),
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.minimum),
 	 "Address Minimum", NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.maximum),
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.maximum),
 	 "Address Maximum", NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.translation_offset),
+	{ACPI_RSD_UINT64,
+	 ACPI_RSD_OFFSET(ext_address64.address.translation_offset),
 	 "Translation Offset", NULL},
-	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address_length),
+	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.address_length),
 	 "Address Length", NULL},
 	{ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.type_specific),
 	 "Type-Specific Attribute", NULL}

drivers/acpi/acpica/rsinfo.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsio.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsirq.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rslist.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsmemory.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsmisc.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsserial.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsutils.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/rsxface.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 	ACPI_COPY_FIELD(out, in, min_address_fixed);         \
 	ACPI_COPY_FIELD(out, in, max_address_fixed);         \
 	ACPI_COPY_FIELD(out, in, info);                      \
-	ACPI_COPY_FIELD(out, in, granularity);               \
-	ACPI_COPY_FIELD(out, in, minimum);                   \
-	ACPI_COPY_FIELD(out, in, maximum);                   \
-	ACPI_COPY_FIELD(out, in, translation_offset);        \
-	ACPI_COPY_FIELD(out, in, address_length);            \
+	ACPI_COPY_FIELD(out, in, address.granularity);       \
+	ACPI_COPY_FIELD(out, in, address.minimum);           \
+	ACPI_COPY_FIELD(out, in, address.maximum);           \
+	ACPI_COPY_FIELD(out, in, address.translation_offset); \
+	ACPI_COPY_FIELD(out, in, address.address_length);    \
 	ACPI_COPY_FIELD(out, in, resource_source);
 /* Local prototypes */
 static acpi_status

drivers/acpi/acpica/tbdata.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/tbfadt.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/tbfind.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/tbinstal.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/tbprint.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/tbutils.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/tbxface.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 }
 
 ACPI_EXPORT_SYMBOL(acpi_get_table_header)
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_unload_table_id
- *
- * PARAMETERS:  id            - Owner ID of the table to be removed.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: This routine is used to force the unload of a table (by id)
- *
- ******************************************************************************/
-acpi_status acpi_unload_table_id(acpi_owner_id id)
-{
-	int i;
-	acpi_status status = AE_NOT_EXIST;
-
-	ACPI_FUNCTION_TRACE(acpi_unload_table_id);
-
-	/* Find table in the global table list */
-	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
-		if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
-			continue;
-		}
-		/*
-		 * Delete all namespace objects owned by this table. Note that these
-		 * objects can appear anywhere in the namespace by virtue of the AML
-		 * "Scope" operator. Thus, we need to track ownership by an ID, not
-		 * simply a position within the hierarchy
-		 */
-		acpi_tb_delete_namespace_by_owner(i);
-		status = acpi_tb_release_owner_id(i);
-		acpi_tb_set_table_loaded_flag(i, FALSE);
-		break;
-	}
-	return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_unload_table_id)
 
 /*******************************************************************************
  *

drivers/acpi/acpica/tbxfload.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/tbxfroot.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utaddress.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utalloc.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utbuffer.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utcache.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utcopy.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utdebug.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utdecode.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utdelete.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/uterror.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/uteval.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utexcep.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utfileio.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utglobal.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/uthex.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utids.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utinit.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utlock.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utmath.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utmisc.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utmutex.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utobject.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utosi.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utownerid.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utpredef.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utprint.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utresrc.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utstate.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utstring.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/uttrack.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utuuid.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utxface.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utxferror.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utxfinit.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/acpica/utxfmutex.c

···
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

drivers/acpi/device_pm.c

···
 
 static struct dev_pm_domain acpi_general_pm_domain = {
 	.ops = {
-#ifdef CONFIG_PM
 		.runtime_suspend = acpi_subsys_runtime_suspend,
 		.runtime_resume = acpi_subsys_runtime_resume,
 #ifdef CONFIG_PM_SLEEP
···
 		.poweroff = acpi_subsys_suspend,
 		.poweroff_late = acpi_subsys_suspend_late,
 		.restore_early = acpi_subsys_resume_early,
-#endif
 #endif
 	},
 };

drivers/acpi/ec.c

···
 /*
- *  ec.c - ACPI Embedded Controller Driver (v2.2)
+ *  ec.c - ACPI Embedded Controller Driver (v3)
  *
- *  Copyright (C) 2001-2014 Intel Corporation
- *    Author: 2014       Lv Zheng <[e-mail]>
+ *  Copyright (C) 2001-2015 Intel Corporation
+ *    Author: 2014, 2015 Lv Zheng <[e-mail]>
  *            2006, 2007 Alexey Starikovskiy <[e-mail]>
  *            2006       Denis Sadykov <[e-mail]>
  *            2004       Luming Yu <[e-mail]>
···
 
 /* Uncomment next line to get verbose printout */
 /* #define DEBUG */
+#define DEBUG_REF 0
 #define pr_fmt(fmt) "ACPI : EC: " fmt
 
 #include <linux/kernel.h>
···
 #define ACPI_EC_DELAY		500	/* Wait 500ms max. during EC ops */
 #define ACPI_EC_UDELAY_GLK	1000	/* Wait 1ms max. to get global lock */
 #define ACPI_EC_MSI_UDELAY	550	/* Wait 550us for MSI EC */
+#define ACPI_EC_UDELAY_POLL	1000	/* Wait 1ms for EC transaction polling */
 #define ACPI_EC_CLEAR_MAX	100	/* Maximum number of events to query
 					 * when trying to clear the EC */
 
 enum {
-	EC_FLAGS_QUERY_PENDING,		/* Query is pending */
-	EC_FLAGS_GPE_STORM,		/* GPE storm detected */
+	EC_FLAGS_EVENT_ENABLED,		/* Event is enabled */
+	EC_FLAGS_EVENT_PENDING,		/* Event is pending */
+	EC_FLAGS_EVENT_DETECTED,	/* Event is detected */
 	EC_FLAGS_HANDLERS_INSTALLED,	/* Handlers for GPE and
 					 * OpReg are installed */
-	EC_FLAGS_BLOCKED,		/* Transactions are blocked */
+	EC_FLAGS_STARTED,		/* Driver is started */
+	EC_FLAGS_STOPPED,		/* Driver is stopped */
+	EC_FLAGS_COMMAND_STORM,		/* GPE storms occurred to the
+					 * current command processing */
 };
 
 #define ACPI_EC_COMMAND_POLL		0x01 /* Available for command byte */
 #define ACPI_EC_COMMAND_COMPLETE	0x02 /* Completed last byte */
+
+#define ec_debug_ref(ec, fmt, ...)					\
+	do {								\
+		if (DEBUG_REF)						\
+			pr_debug("%lu: " fmt, ec->reference_count,	\
+				 ## __VA_ARGS__);			\
+	} while (0)
 
 /* ec.c is compiled in acpi namespace so this shows up as acpi.ec_delay param */
 static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY;
···
 	acpi_handle handle;
 	void *data;
 	u8 query_bit;
+	struct kref kref;
 };
 
 struct transaction {
···
 	u8 wlen;
 	u8 rlen;
 	u8 flags;
+	unsigned long timestamp;
 };
+
+static int acpi_ec_query(struct acpi_ec *ec, u8 *data);
+static void advance_transaction(struct acpi_ec *ec);
 
 struct acpi_ec *boot_ec, *first_ec;
 EXPORT_SYMBOL(first_ec);
···
 static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */
 
 /* --------------------------------------------------------------------------
- *                           Transaction Management
+ *                           Device Flags
+ * -------------------------------------------------------------------------- */
+
+static bool acpi_ec_started(struct acpi_ec *ec)
+{
+	return test_bit(EC_FLAGS_STARTED, &ec->flags) &&
+	       !test_bit(EC_FLAGS_STOPPED, &ec->flags);
+}
+
+static bool acpi_ec_flushed(struct acpi_ec *ec)
+{
+	return ec->reference_count == 1;
+}
+
+static bool acpi_ec_has_pending_event(struct acpi_ec *ec)
+{
+	return test_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags) ||
+	       test_bit(EC_FLAGS_EVENT_PENDING, &ec->flags);
+}
+
+/* --------------------------------------------------------------------------
+ *                           EC Registers
  * -------------------------------------------------------------------------- */
 
 static inline u8 acpi_ec_read_status(struct acpi_ec *ec)
···
 {
 	u8 x = inb(ec->data_addr);
 
+	ec->curr->timestamp = jiffies;
 	pr_debug("EC_DATA(R) = 0x%2.2x\n", x);
 	return x;
 }
···
 {
 	pr_debug("EC_SC(W) = 0x%2.2x\n", command);
 	outb(command, ec->command_addr);
+	ec->curr->timestamp = jiffies;
 }
 
 static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
 {
 	pr_debug("EC_DATA(W) = 0x%2.2x\n", data);
 	outb(data, ec->data_addr);
+	ec->curr->timestamp = jiffies;
 }
 
 #ifdef DEBUG
···
 #define acpi_ec_cmd_string(cmd)		"UNDEF"
 #endif
 
+/* --------------------------------------------------------------------------
+ *                           GPE Registers
+ * -------------------------------------------------------------------------- */
+
+static inline bool acpi_ec_is_gpe_raised(struct acpi_ec *ec)
+{
+	acpi_event_status gpe_status = 0;
+
+	(void)acpi_get_gpe_status(NULL, ec->gpe, &gpe_status);
+	return (gpe_status & ACPI_EVENT_FLAG_SET) ? true : false;
+}
+
+static inline void acpi_ec_enable_gpe(struct acpi_ec *ec, bool open)
+{
+	if (open)
+		acpi_enable_gpe(NULL, ec->gpe);
+	else {
+		BUG_ON(ec->reference_count < 1);
+		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
+	}
+	if (acpi_ec_is_gpe_raised(ec)) {
+		/*
+		 * On some platforms, EN=1 writes cannot trigger GPE. So
+		 * software need to manually trigger a pseudo GPE event on
+		 * EN=1 writes.
+		 */
+		pr_debug("***** Polling quirk *****\n");
+		advance_transaction(ec);
+	}
+}
+
+static inline void acpi_ec_disable_gpe(struct acpi_ec *ec, bool close)
+{
+	if (close)
+		acpi_disable_gpe(NULL, ec->gpe);
+	else {
+		BUG_ON(ec->reference_count < 1);
+		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
+	}
+}
+
+static inline void acpi_ec_clear_gpe(struct acpi_ec *ec)
+{
+	/*
+	 * GPE STS is a W1C register, which means:
+	 * 1. Software can clear it without worrying about clearing other
+	 *    GPEs' STS bits when the hardware sets them in parallel.
+	 * 2. As long as software can ensure only clearing it when it is
+	 *    set, hardware won't set it in parallel.
+	 * So software can clear GPE in any contexts.
+	 * Warning: do not move the check into advance_transaction() as the
+	 * EC commands will be sent without GPE raised.
+	 */
+	if (!acpi_ec_is_gpe_raised(ec))
+		return;
+	acpi_clear_gpe(NULL, ec->gpe);
+}
+
+/* --------------------------------------------------------------------------
+ *                           Transaction Management
+ * -------------------------------------------------------------------------- */
+
+static void acpi_ec_submit_request(struct acpi_ec *ec)
+{
+	ec->reference_count++;
+	if (ec->reference_count == 1)
+		acpi_ec_enable_gpe(ec, true);
+}
+
+static void acpi_ec_complete_request(struct acpi_ec *ec)
+{
+	bool flushed = false;
+
+	ec->reference_count--;
+	if (ec->reference_count == 0)
+		acpi_ec_disable_gpe(ec, true);
+	flushed = acpi_ec_flushed(ec);
+	if (flushed)
+		wake_up(&ec->wait);
+}
+
+static void acpi_ec_set_storm(struct acpi_ec *ec, u8 flag)
+{
+	if (!test_bit(flag, &ec->flags)) {
+		acpi_ec_disable_gpe(ec, false);
+		pr_debug("+++++ Polling enabled +++++\n");
+		set_bit(flag, &ec->flags);
+	}
+}
+
+static void acpi_ec_clear_storm(struct acpi_ec *ec, u8 flag)
+{
+	if (test_bit(flag, &ec->flags)) {
+		clear_bit(flag, &ec->flags);
+		acpi_ec_enable_gpe(ec, false);
+		pr_debug("+++++ Polling disabled +++++\n");
+	}
+}
+
+/*
+ * acpi_ec_submit_flushable_request() - Increase the reference count unless
+ *                                      the flush operation is not in
+ *                                      progress
+ * @ec: the EC device
+ * @allow_event: whether event should be handled
+ *
+ * This function must be used before taking a new action that should hold
+ * the reference count.  If this function returns false, then the action
+ * must be discarded or it will prevent the flush operation from being
+ * completed.
+ *
+ * During flushing, QR_EC command need to pass this check when there is a
+ * pending event, so that the reference count held for the pending event
+ * can be decreased by the completion of the QR_EC command.
+ */
+static bool acpi_ec_submit_flushable_request(struct acpi_ec *ec,
+					     bool allow_event)
+{
+	if (!acpi_ec_started(ec)) {
+		if (!allow_event || !acpi_ec_has_pending_event(ec))
+			return false;
+	}
+	acpi_ec_submit_request(ec);
+	return true;
+}
+
+static void acpi_ec_submit_event(struct acpi_ec *ec)
+{
+	if (!test_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags) ||
+	    !test_bit(EC_FLAGS_EVENT_ENABLED, &ec->flags))
+		return;
+	/* Hold reference for pending event */
+	if (!acpi_ec_submit_flushable_request(ec, true))
+		return;
+	ec_debug_ref(ec, "Increase event\n");
+	if (!test_and_set_bit(EC_FLAGS_EVENT_PENDING, &ec->flags)) {
+		pr_debug("***** Event query started *****\n");
+		schedule_work(&ec->work);
+		return;
+	}
+	acpi_ec_complete_request(ec);
+	ec_debug_ref(ec, "Decrease event\n");
+}
+
+static void acpi_ec_complete_event(struct acpi_ec *ec)
+{
+	if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {
+		clear_bit(EC_FLAGS_EVENT_PENDING, &ec->flags);
+		pr_debug("***** Event query stopped *****\n");
+		/* Unhold reference for pending event */
+		acpi_ec_complete_request(ec);
+		ec_debug_ref(ec, "Decrease event\n");
+		/* Check if there is another SCI_EVT detected */
+		acpi_ec_submit_event(ec);
+	}
+}
+
+static void acpi_ec_submit_detection(struct acpi_ec *ec)
+{
+	/* Hold reference for query submission */
+	if (!acpi_ec_submit_flushable_request(ec, false))
+		return;
+	ec_debug_ref(ec, "Increase query\n");
+	if (!test_and_set_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags)) {
+		pr_debug("***** Event detection blocked *****\n");
+		acpi_ec_submit_event(ec);
+		return;
+	}
+	acpi_ec_complete_request(ec);
+	ec_debug_ref(ec, "Decrease query\n");
+}
+
+static void acpi_ec_complete_detection(struct acpi_ec *ec)
+{
+	if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {
+		clear_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags);
+		pr_debug("***** Event detetion unblocked *****\n");
+		/* Unhold reference for query submission */
+		acpi_ec_complete_request(ec);
+		ec_debug_ref(ec, "Decrease query\n");
+	}
+}
+
+static void acpi_ec_enable_event(struct acpi_ec *ec)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ec->lock, flags);
+	set_bit(EC_FLAGS_EVENT_ENABLED, &ec->flags);
+	/*
+	 * An event may be pending even with SCI_EVT=0, so QR_EC should
+	 * always be issued right after started.
+	 */
+	acpi_ec_submit_detection(ec);
+	spin_unlock_irqrestore(&ec->lock, flags);
+}
+
 static int ec_transaction_completed(struct acpi_ec *ec)
 {
 	unsigned long flags;
···
 	return ret;
 }
 
-static bool advance_transaction(struct acpi_ec *ec)
+static void advance_transaction(struct acpi_ec *ec)
 {
 	struct transaction *t;
 	u8 status;
···
 
 	pr_debug("===== %s (%d) =====\n",
 		 in_interrupt() ? "IRQ" : "TASK", smp_processor_id());
+	/*
+	 * By always clearing STS before handling all indications, we can
+	 * ensure a hardware STS 0->1 change after this clearing can always
+	 * trigger a GPE interrupt.
+	 */
+	acpi_ec_clear_gpe(ec);
 	status = acpi_ec_read_status(ec);
 	t = ec->curr;
 	if (!t)
···
 				t->rdata[t->ri++] = acpi_ec_read_data(ec);
 				if (t->rlen == t->ri) {
 					t->flags |= ACPI_EC_COMMAND_COMPLETE;
+					acpi_ec_complete_event(ec);
 					if (t->command == ACPI_EC_COMMAND_QUERY)
 						pr_debug("***** Command(%s) hardware completion *****\n",
 							 acpi_ec_cmd_string(t->command));
···
 		} else if (t->wlen == t->wi &&
 			   (status & ACPI_EC_FLAG_IBF) == 0) {
 			t->flags |= ACPI_EC_COMMAND_COMPLETE;
+			acpi_ec_complete_event(ec);
 			wakeup = true;
 		}
-		return wakeup;
+		goto out;
 	} else {
 		if (EC_FLAGS_QUERY_HANDSHAKE &&
 		    !(status & ACPI_EC_FLAG_SCI) &&
 		    (t->command == ACPI_EC_COMMAND_QUERY)) {
 			t->flags |= ACPI_EC_COMMAND_POLL;
+			acpi_ec_complete_detection(ec);
 			t->rdata[t->ri++] = 0x00;
 			t->flags |= ACPI_EC_COMMAND_COMPLETE;
+			acpi_ec_complete_event(ec);
 			pr_debug("***** Command(%s) software completion *****\n",
 				 acpi_ec_cmd_string(t->command));
 			wakeup = true;
 		} else if ((status & ACPI_EC_FLAG_IBF) == 0) {
 			acpi_ec_write_cmd(ec, t->command);
 			t->flags |= ACPI_EC_COMMAND_POLL;
+			acpi_ec_complete_detection(ec);
 		} else
 			goto err;
-		return wakeup;
+		goto out;
 	}
 err:
 	/*
···
 	 * otherwise will take a not handled IRQ as a false one.
 	 */
 	if (!(status & ACPI_EC_FLAG_SCI)) {
-		if (in_interrupt() && t)
-			++t->irq_count;
+		if (in_interrupt() && t) {
+			if (t->irq_count < ec_storm_threshold)
+				++t->irq_count;
+			/* Allow triggering on 0 threshold */
+			if (t->irq_count == ec_storm_threshold)
+				acpi_ec_set_storm(ec, EC_FLAGS_COMMAND_STORM);
+		}
 	}
-	return wakeup;
+out:
+	if (status & ACPI_EC_FLAG_SCI)
+		acpi_ec_submit_detection(ec);
+	if (wakeup && in_interrupt())
+		wake_up(&ec->wait);
 }
 
 static void start_transaction(struct acpi_ec *ec)
 {
 	ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;
 	ec->curr->flags = 0;
-	(void)advance_transaction(ec);
-}
-
-static int acpi_ec_sync_query(struct acpi_ec *ec, u8 *data);
-
-static int ec_check_sci_sync(struct acpi_ec *ec, u8 state)
-{
-	if (state & ACPI_EC_FLAG_SCI) {
-		if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))
-			return acpi_ec_sync_query(ec, NULL);
-	}
-	return 0;
+	ec->curr->timestamp = jiffies;
+	advance_transaction(ec);
 }
 
 static int ec_poll(struct acpi_ec *ec)
···
 	while (repeat--) {
 		unsigned long delay = jiffies +
 			msecs_to_jiffies(ec_delay);
+		unsigned long usecs = ACPI_EC_UDELAY_POLL;
 		do {
 			/* don't sleep with disabled interrupts */
 			if (EC_FLAGS_MSI || irqs_disabled()) {
-				udelay(ACPI_EC_MSI_UDELAY);
+				usecs = ACPI_EC_MSI_UDELAY;
+				udelay(usecs);
 				if (ec_transaction_completed(ec))
 					return 0;
 			} else {
 				if (wait_event_timeout(ec->wait,
 						ec_transaction_completed(ec),
-						msecs_to_jiffies(1)))
+						usecs_to_jiffies(usecs)))
 					return 0;
 			}
 			spin_lock_irqsave(&ec->lock, flags);
-			(void)advance_transaction(ec);
+			if (time_after(jiffies,
+					ec->curr->timestamp +
+					usecs_to_jiffies(usecs)))
+				advance_transaction(ec);
 			spin_unlock_irqrestore(&ec->lock, flags);
 		} while (time_before(jiffies, delay));
 		pr_debug("controller reset, restart transaction\n");
···
 		udelay(ACPI_EC_MSI_UDELAY);
 	/* start transaction */
 	spin_lock_irqsave(&ec->lock, tmp);
+	/* Enable GPE for command processing (IBF=0/OBF=1) */
+	if (!acpi_ec_submit_flushable_request(ec, true)) {
+		ret = -EINVAL;
+		goto unlock;
+	}
+	ec_debug_ref(ec, "Increase command\n");
 	/* following two actions should be kept atomic */
 	ec->curr = t;
 	pr_debug("***** Command(%s) started *****\n",
 		 acpi_ec_cmd_string(t->command));
 	start_transaction(ec);
-	if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {
-		clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
-		pr_debug("***** Event stopped *****\n");
-	}
 	spin_unlock_irqrestore(&ec->lock, tmp);
 	ret = ec_poll(ec);
 	spin_lock_irqsave(&ec->lock, tmp);
+	if (t->irq_count == ec_storm_threshold)
+		acpi_ec_clear_storm(ec, EC_FLAGS_COMMAND_STORM);
 	pr_debug("***** Command(%s) stopped *****\n",
 		 acpi_ec_cmd_string(t->command));
 	ec->curr = NULL;
+	/* Disable GPE for command processing (IBF=0/OBF=1) */
+	acpi_ec_complete_request(ec);
+	ec_debug_ref(ec, "Decrease command\n");
+unlock:
 	spin_unlock_irqrestore(&ec->lock, tmp);
 	return ret;
 }
···
 	if (t->rdata)
 		memset(t->rdata, 0, t->rlen);
 	mutex_lock(&ec->mutex);
-	if (test_bit(EC_FLAGS_BLOCKED, &ec->flags)) {
-		status = -EINVAL;
-		goto unlock;
-	}
 	if (ec->global_lock) {
 		status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
 		if (ACPI_FAILURE(status)) {
···
 			goto unlock;
 		}
 	}
-	/* disable GPE during transaction if storm is detected */
-	if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
-		/* It has to be disabled, so that it doesn't trigger. */
-		acpi_disable_gpe(NULL, ec->gpe);
-	}
 
 	status = acpi_ec_transaction_unlocked(ec, t);
 
-	/* check if we received SCI during transaction */
-	ec_check_sci_sync(ec, acpi_ec_read_status(ec));
-	if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
+	if (test_bit(EC_FLAGS_COMMAND_STORM, &ec->flags))
 		msleep(1);
-		/* It is safe to enable the GPE outside of the transaction. */
-		acpi_enable_gpe(NULL, ec->gpe);
-	} else if (t->irq_count > ec_storm_threshold) {
-		pr_info("GPE storm detected(%d GPEs), "
-			"transactions will use polling mode\n",
-			t->irq_count);
-		set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
-	}
 	if (ec->global_lock)
 		acpi_release_global_lock(glk);
 unlock:
···
 	u8 value = 0;
 
 	for (i = 0; i < ACPI_EC_CLEAR_MAX; i++) {
-		status = acpi_ec_sync_query(ec, &value);
+		status = acpi_ec_query(ec, &value);
 		if (status || !value)
 			break;
 	}
···
 		pr_warn("Warning: Maximum of %d stale EC events cleared\n", i);
 	else
 		pr_info("%d stale EC events cleared\n", i);
+}
+
+static void acpi_ec_start(struct acpi_ec *ec, bool resuming)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ec->lock, flags);
+	if (!test_and_set_bit(EC_FLAGS_STARTED, &ec->flags)) {
+		pr_debug("+++++ Starting EC +++++\n");
+		/* Enable GPE for event processing (SCI_EVT=1) */
+		if (!resuming) {
+			acpi_ec_submit_request(ec);
+			ec_debug_ref(ec, "Increase driver\n");
+		}
+		pr_info("+++++ EC started +++++\n");
+	}
+	spin_unlock_irqrestore(&ec->lock, flags);
+}
+
+static bool acpi_ec_stopped(struct acpi_ec *ec)
+{
+	unsigned long flags;
+	bool flushed;
+
+	spin_lock_irqsave(&ec->lock, flags);
+	flushed = acpi_ec_flushed(ec);
+	spin_unlock_irqrestore(&ec->lock, flags);
+	return flushed;
+}
+
+static void acpi_ec_stop(struct acpi_ec *ec, bool suspending)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ec->lock, flags);
+	if (acpi_ec_started(ec)) {
+		pr_debug("+++++ Stopping EC +++++\n");
+		set_bit(EC_FLAGS_STOPPED, &ec->flags);
+		spin_unlock_irqrestore(&ec->lock, flags);
+		wait_event(ec->wait, acpi_ec_stopped(ec));
+		spin_lock_irqsave(&ec->lock, flags);
+		/* Disable GPE for event processing (SCI_EVT=1) */
+		if (!suspending) {
+			acpi_ec_complete_request(ec);
+			ec_debug_ref(ec, "Decrease driver\n");
+		}
+		clear_bit(EC_FLAGS_STARTED, &ec->flags);
+		clear_bit(EC_FLAGS_STOPPED, &ec->flags);
+		pr_info("+++++ EC stopped +++++\n");
+	}
+	spin_unlock_irqrestore(&ec->lock, flags);
 }
 
 void acpi_ec_block_transactions(void)
···
 
 	mutex_lock(&ec->mutex);
 	/* Prevent transactions from being carried out */
-	set_bit(EC_FLAGS_BLOCKED, &ec->flags);
+	acpi_ec_stop(ec, true);
 	mutex_unlock(&ec->mutex);
 }
 
···
 	if (!ec)
 		return;
 
-	mutex_lock(&ec->mutex);
 	/* Allow transactions to be carried out again */
-	clear_bit(EC_FLAGS_BLOCKED, &ec->flags);
+	acpi_ec_start(ec, true);
 
 	if (EC_FLAGS_CLEAR_ON_RESUME)
 		acpi_ec_clear(ec);
-
-	mutex_unlock(&ec->mutex);
 }
 
 void acpi_ec_unblock_transactions_early(void)
···
 	 * atomic context during wakeup, so we don't need to acquire the mutex).
 	 */
 	if (first_ec)
-		clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags);
-}
-
-static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 *data)
-{
-	int result;
-	u8 d;
-	struct transaction t = {.command = ACPI_EC_COMMAND_QUERY,
-				.wdata = NULL, .rdata = &d,
-				.wlen = 0, .rlen = 1};
-
-	if (!ec || !data)
-		return -EINVAL;
-	/*
-	 * Query the EC to find out which _Qxx method we need to evaluate.
-	 * Note that successful completion of the query causes the ACPI_EC_SCI
-	 * bit to be cleared (and thus clearing the interrupt source).
-	 */
-	result = acpi_ec_transaction_unlocked(ec, &t);
-	if (result)
-		return result;
-	if (!d)
-		return -ENODATA;
-	*data = d;
-	return 0;
+		acpi_ec_start(first_ec, true);
 }
 
 /* --------------------------------------------------------------------------
                                 Event Management
    -------------------------------------------------------------------------- */
+static struct acpi_ec_query_handler *
+acpi_ec_get_query_handler(struct acpi_ec_query_handler *handler)
+{
+	if (handler)
+		kref_get(&handler->kref);
+	return handler;
+}
+
+static void acpi_ec_query_handler_release(struct kref *kref)
+{
+	struct acpi_ec_query_handler *handler =
+		container_of(kref, struct acpi_ec_query_handler, kref);
+
+	kfree(handler);
+}
+
+static void acpi_ec_put_query_handler(struct acpi_ec_query_handler *handler)
+{
+	kref_put(&handler->kref, acpi_ec_query_handler_release);
+}
+
 int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
 			      acpi_handle handle, acpi_ec_query_func func,
 			      void *data)
···
 	handler->func = func;
 	handler->data = data;
 	mutex_lock(&ec->mutex);
+	kref_init(&handler->kref);
 	list_add(&handler->node, &ec->list);
 	mutex_unlock(&ec->mutex);
 	return 0;
···
 void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
 {
 	struct acpi_ec_query_handler *handler, *tmp;
+	LIST_HEAD(free_list);
 
 	mutex_lock(&ec->mutex);
 	list_for_each_entry_safe(handler, tmp, &ec->list, node) {
 		if (query_bit == handler->query_bit) {
-			list_del(&handler->node);
-			kfree(handler);
+			list_del_init(&handler->node);
+			list_add(&handler->node, &free_list);
 		}
 	}
 	mutex_unlock(&ec->mutex);
+	list_for_each_entry(handler, &free_list, node)
+		acpi_ec_put_query_handler(handler);
 }
 EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
 
···
 	else if (handler->handle)
 		acpi_evaluate_object(handler->handle, NULL, NULL, NULL);
 	pr_debug("##### Query(0x%02x) stopped #####\n", handler->query_bit);
-	kfree(handler);
+	acpi_ec_put_query_handler(handler);
 }
 
-static int acpi_ec_sync_query(struct acpi_ec *ec, u8 *data)
+static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
 {
 	u8 value = 0;
-	int status;
-	struct acpi_ec_query_handler *handler, *copy;
+	int result;
+	acpi_status status;
+	struct acpi_ec_query_handler *handler;
+	struct transaction t = {.command = ACPI_EC_COMMAND_QUERY,
+				.wdata = NULL, .rdata = &value,
+				.wlen = 0, .rlen = 1};
 
-	status = acpi_ec_query_unlocked(ec, &value);
+	/*
+	 * Query the EC to find out which _Qxx method we need to evaluate.
+	 * Note that successful completion of the query causes the ACPI_EC_SCI
+	 * bit to be cleared (and thus clearing the interrupt source).
+	 */
+	result = acpi_ec_transaction(ec, &t);
+	if (result)
+		return result;
 	if (data)
 		*data = value;
-	if (status)
-		return status;
+	if (!value)
+		return -ENODATA;
 
+	mutex_lock(&ec->mutex);
 	list_for_each_entry(handler, &ec->list, node) {
 		if (value == handler->query_bit) {
 			/* have custom handler for this bit */
-			copy = kmalloc(sizeof(*handler), GFP_KERNEL);
-			if (!copy)
-				return -ENOMEM;
-			memcpy(copy, handler, sizeof(*copy));
+			handler = acpi_ec_get_query_handler(handler);
 			pr_debug("##### Query(0x%02x) scheduled #####\n",
 				 handler->query_bit);
-			return acpi_os_execute((copy->func) ?
+			status = acpi_os_execute((handler->func) ?
 				OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER,
-				acpi_ec_run, copy);
+				acpi_ec_run, handler);
+			if (ACPI_FAILURE(status))
+				result = -EBUSY;
+			break;
 		}
 	}
-	return 0;
-}
-
-static void acpi_ec_gpe_query(void *ec_cxt)
-{
-	struct acpi_ec *ec = ec_cxt;
-
-	if (!ec)
-		return;
-	mutex_lock(&ec->mutex);
-	acpi_ec_sync_query(ec, NULL);
 	mutex_unlock(&ec->mutex);
+	return result;
 }
 
-static int ec_check_sci(struct acpi_ec *ec, u8 state)
+static void acpi_ec_gpe_poller(struct work_struct *work)
 {
-	if (state & ACPI_EC_FLAG_SCI) {
-		if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) {
-			pr_debug("***** Event started *****\n");
-			return acpi_os_execute(OSL_NOTIFY_HANDLER,
-				acpi_ec_gpe_query, ec);
-		}
-	}
-	return 0;
+	struct acpi_ec *ec = container_of(work, struct acpi_ec, work);
+
+	pr_debug("***** Event poller started *****\n");
+	acpi_ec_query(ec, NULL);
+	pr_debug("***** Event poller stopped *****\n");
 }
 
 static u32 acpi_ec_gpe_handler(acpi_handle gpe_device,
···
 	struct acpi_ec *ec = data;
 
 	spin_lock_irqsave(&ec->lock, flags);
-	if (advance_transaction(ec))
-		wake_up(&ec->wait);
+	advance_transaction(ec);
 	spin_unlock_irqrestore(&ec->lock, flags);
-	ec_check_sci(ec, acpi_ec_read_status(ec));
-	return ACPI_INTERRUPT_HANDLED | ACPI_REENABLE_GPE;
+	return ACPI_INTERRUPT_HANDLED;
 }
 
 /* --------------------------------------------------------------------------
···
 
 	if (!ec)
 		return NULL;
-	ec->flags = 1 << EC_FLAGS_QUERY_PENDING;
 	mutex_init(&ec->mutex);
 	init_waitqueue_head(&ec->wait);
 	INIT_LIST_HEAD(&ec->list);
 	spin_lock_init(&ec->lock);
+	INIT_WORK(&ec->work, acpi_ec_gpe_poller);
 	return ec;
 }
 
···
 
 	if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags))
 		return 0;
-	status = acpi_install_gpe_handler(NULL, ec->gpe,
+	status = acpi_install_gpe_raw_handler(NULL, ec->gpe,
 				  ACPI_GPE_EDGE_TRIGGERED,
 				  &acpi_ec_gpe_handler, ec);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
-	acpi_enable_gpe(NULL, ec->gpe);
+	acpi_ec_start(ec, false);
 	status = acpi_install_address_space_handler(ec->handle,
 						    ACPI_ADR_SPACE_EC,
 						    &acpi_ec_space_handler,
···
 			pr_err("Fail in evaluating the _REG object"
 				" of EC device. Broken bios is suspected.\n");
 		} else {
-			acpi_disable_gpe(NULL, ec->gpe);
+			acpi_ec_stop(ec, false);
 			acpi_remove_gpe_handler(NULL, ec->gpe,
 				&acpi_ec_gpe_handler);
 			return -ENODEV;
···
 {
 	if (!test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags))
 		return;
-	acpi_disable_gpe(NULL, ec->gpe);
+	acpi_ec_stop(ec, false);
 	if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
 				ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
 		pr_err("failed to remove space handler\n");
···
 	ret = ec_install_handlers(ec);
 
 	/* EC is fully operational, allow queries */
-	clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
+	acpi_ec_enable_event(ec);
 
 	/* Clear stale _Q events if hardware might require that */
-	if (EC_FLAGS_CLEAR_ON_RESUME) {
-		mutex_lock(&ec->mutex);
+	if (EC_FLAGS_CLEAR_ON_RESUME)
 		acpi_ec_clear(ec);
-		mutex_unlock(&ec->mutex);
-	}
 	return ret;
 }
 

drivers/acpi/internal.h

···
 int acpi_sysfs_init(void);
 void acpi_container_init(void);
 void acpi_memory_hotplug_init(void);
+#ifdef	CONFIG_ACPI_HOTPLUG_IOAPIC
+int acpi_ioapic_add(struct acpi_pci_root *root);
+int acpi_ioapic_remove(struct acpi_pci_root *root);
+#else
+static inline int acpi_ioapic_add(struct acpi_pci_root *root) { return 0; }
+static inline int acpi_ioapic_remove(struct acpi_pci_root *root) { return 0; }
+#endif
 #ifdef CONFIG_ACPI_DOCK
 void register_dock_dependent_device(struct acpi_device *adev,
 				    acpi_handle dshandle);
···
 static inline void acpi_debugfs_init(void) { return; }
 #endif
 void acpi_lpss_init(void);
+
+void acpi_apd_init(void);
 
 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src);
 bool acpi_queue_hotplug_work(struct work_struct *work);
···
 	unsigned long data_addr;
 	unsigned long global_lock;
 	unsigned long flags;
+	unsigned long reference_count;
 	struct mutex mutex;
 	wait_queue_head_t wait;
 	struct list_head list;
 	struct transaction *curr;
 	spinlock_t lock;
+	struct work_struct work;
 };
 
 extern struct acpi_ec *first_ec;

drivers/acpi/ioapic.c

···
+/*
+ * IOAPIC/IOxAPIC/IOSAPIC driver
+ *
+ * Copyright (C) 2009 Fujitsu Limited.
+ * (c) Copyright 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on original drivers/pci/ioapic.c
+ *	Yinghai Lu <[e-mail]>
+ *	Jiang Liu <[e-mail]>
+ */
+
+/*
+ * This driver manages I/O APICs added by hotplug after boot.
+ * We try to claim all I/O APIC devices, but those present at boot were
+ * registered when we parsed the ACPI MADT.
+ */
+
+#define pr_fmt(fmt) "ACPI : IOAPIC: " fmt
+
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <acpi/acpi.h>
+
+struct acpi_pci_ioapic {
+	acpi_handle	root_handle;
+	acpi_handle	handle;
+	u32		gsi_base;
+	struct resource	res;
+	struct pci_dev	*pdev;
+	struct list_head list;
+};
+
+static LIST_HEAD(ioapic_list);
+static DEFINE_MUTEX(ioapic_list_lock);
+
+static acpi_status setup_res(struct acpi_resource *acpi_res, void *data)
+{
+	struct resource *res = data;
+	struct resource_win win;
+
+	res->flags = 0;
+	if (acpi_dev_filter_resource_type(acpi_res, IORESOURCE_MEM) == 0)
+		return AE_OK;
+
+	if (!acpi_dev_resource_memory(acpi_res, res)) {
+		if (acpi_dev_resource_address_space(acpi_res, &win) ||
+		    acpi_dev_resource_ext_address_space(acpi_res, &win))
+			*res = win.res;
+	}
+	if ((res->flags & IORESOURCE_PREFETCH) ||
+	    (res->flags & IORESOURCE_DISABLED))
+		res->flags = 0;
+
+	return AE_CTRL_TERMINATE;
+}
+
+static bool acpi_is_ioapic(acpi_handle handle, char **type)
+{
+	acpi_status status;
+	struct acpi_device_info *info;
+	char *hid = NULL;
+	bool match = false;
+
+	if (!acpi_has_method(handle, "_GSB"))
+		return false;
+
+	status = acpi_get_object_info(handle, &info);
+	if (ACPI_SUCCESS(status)) {
+		if (info->valid & ACPI_VALID_HID)
+			hid = info->hardware_id.string;
+		if (hid) {
+			if (strcmp(hid, "ACPI0009") == 0) {
+				*type = "IOxAPIC";
+				match = true;
+			} else if (strcmp(hid, "ACPI000A") == 0) {
+				*type = "IOAPIC";
+				match = true;
+			}
+		}
+		kfree(info);
+	}
+
+	return match;
+}
+
+static acpi_status handle_ioapic_add(acpi_handle handle, u32 lvl,
+				     void *context, void **rv)
+{
+	acpi_status status;
+	unsigned long long gsi_base;
+	struct acpi_pci_ioapic *ioapic;
+	struct pci_dev *dev = NULL;
+	struct resource *res = NULL;
+	char *type = NULL;
+
+	if (!acpi_is_ioapic(handle, &type))
+		return AE_OK;
+
+	mutex_lock(&ioapic_list_lock);
+	list_for_each_entry(ioapic, &ioapic_list, list)
+		if (ioapic->handle == handle) {
+			mutex_unlock(&ioapic_list_lock);
+			return AE_OK;
+		}
+
+	status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsi_base);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_warn(handle, "failed to evaluate _GSB method\n");
+		goto exit;
+	}
+
+	ioapic = kzalloc(sizeof(*ioapic), GFP_KERNEL);
+	if (!ioapic) {
+		pr_err("cannot allocate memory for new IOAPIC\n");
+		goto exit;
+	} else {
+		ioapic->root_handle = (acpi_handle)context;
+		ioapic->handle = handle;
+		ioapic->gsi_base = (u32)gsi_base;
+		INIT_LIST_HEAD(&ioapic->list);
+	}
+
+	if (acpi_ioapic_registered(handle, (u32)gsi_base))
+		goto done;
+
+	dev = acpi_get_pci_dev(handle);
+	if (dev && pci_resource_len(dev, 0)) {
+		if (pci_enable_device(dev) < 0)
+			goto exit_put;
+		pci_set_master(dev);
+		if (pci_request_region(dev, 0, type))
+			goto exit_disable;
+		res = &dev->resource[0];
+		ioapic->pdev = dev;
+	} else {
+		pci_dev_put(dev);
+		dev = NULL;
+
+		res = &ioapic->res;
+		acpi_walk_resources(handle, METHOD_NAME__CRS, setup_res, res);
+		if (res->flags == 0) {
+			acpi_handle_warn(handle, "failed to get resource\n");
+			goto exit_free;
+		} else if (request_resource(&iomem_resource, res)) {
+			acpi_handle_warn(handle, "failed to insert resource\n");
+			goto exit_free;
+		}
+	}
+
+	if (acpi_register_ioapic(handle, res->start, (u32)gsi_base)) {
+		acpi_handle_warn(handle, "failed to register IOAPIC\n");
+		goto exit_release;
+	}
+done:
+	list_add(&ioapic->list, &ioapic_list);
+	mutex_unlock(&ioapic_list_lock);
+
+	if (dev)
+		dev_info(&dev->dev, "%s at %pR, GSI %u\n",
+			 type, res, (u32)gsi_base);
+	else
+		acpi_handle_info(handle, "%s at %pR, GSI %u\n",
+				 type, res, (u32)gsi_base);
+
+	return AE_OK;
+
+exit_release:
+	if (dev)
+		pci_release_region(dev, 0);
+	else
+		release_resource(res);
+exit_disable:
+	if (dev)
+		pci_disable_device(dev);
+exit_put:
+	pci_dev_put(dev);
+exit_free:
+	kfree(ioapic);
+exit:
+	mutex_unlock(&ioapic_list_lock);
+	*(acpi_status *)rv = AE_ERROR;
+	return AE_OK;
+}
+
+int acpi_ioapic_add(struct acpi_pci_root *root)
+{
+	acpi_status status, retval = AE_OK;
+
+	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, root->device->handle,
+				     UINT_MAX, handle_ioapic_add, NULL,
+				     root->device->handle, (void **)&retval);
+
+	return ACPI_SUCCESS(status) && ACPI_SUCCESS(retval) ? 0 : -ENODEV;
+}
+
+int acpi_ioapic_remove(struct acpi_pci_root *root)
+{
+	int retval = 0;
+	struct acpi_pci_ioapic *ioapic, *tmp;
+
+	mutex_lock(&ioapic_list_lock);
+	list_for_each_entry_safe(ioapic, tmp, &ioapic_list, list) {
+		if (root->device->handle != ioapic->root_handle)
+			continue;
+
+		if (acpi_unregister_ioapic(ioapic->handle, ioapic->gsi_base))
+			retval = -EBUSY;
+
+		if (ioapic->pdev) {
+			pci_release_region(ioapic->pdev, 0);
+			pci_disable_device(ioapic->pdev);
+			pci_dev_put(ioapic->pdev);
+		} else if (ioapic->res.flags && ioapic->res.parent) {
+			release_resource(&ioapic->res);
+		}
+		list_del(&ioapic->list);
+		kfree(ioapic);
+	}
+	mutex_unlock(&ioapic_list_lock);
+
+	return retval;
+}

drivers/acpi/numa.c

···
 
 static int __init acpi_parse_slit(struct acpi_table_header *table)
 {
-	struct acpi_table_slit *slit;
-
-	if (!table)
-		return -EINVAL;
-
-	slit = (struct acpi_table_slit *)table;
+	struct acpi_table_slit *slit = (struct acpi_table_slit *)table;
 
 	if (!slit_valid(slit)) {
 		printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
···
 
 static int __init acpi_parse_srat(struct acpi_table_header *table)
 {
-	struct acpi_table_srat *srat;
-	if (!table)
-		return -EINVAL;
+	struct acpi_table_srat *srat = (struct acpi_table_srat *)table;
 
-	srat = (struct acpi_table_srat *)table;
 	acpi_srat_revision = srat->header.revision;
 
 	/* Real work done in acpi_table_parse_srat below. */

drivers/acpi/pci_irq.c

···
 	if (!pin || !dev->irq_managed || dev->irq <= 0)
 		return;
 
-	/* Keep IOAPIC pin configuration when suspending */
-	if (dev->dev.power.is_prepared)
-		return;
-#ifdef	CONFIG_PM
-	if (dev->dev.power.runtime_status == RPM_SUSPENDING)
-		return;
-#endif
-
 	entry = acpi_pci_irq_lookup(dev, pin);
 	if (!entry)
 		return;
···
 	if (gsi >= 0) {
 		acpi_unregister_gsi(gsi);
 		dev->irq_managed = 0;
+		dev->irq = 0;
 	}
 }

drivers/acpi/pci_root.c

···
 	if (ACPI_FAILURE(status))
 		return AE_OK;
 
-	if ((address.address_length > 0) &&
+	if ((address.address.address_length > 0) &&
 	    (address.resource_type == ACPI_BUS_NUMBER_RANGE)) {
-		res->start = address.minimum;
-		res->end = address.minimum + address.address_length - 1;
+		res->start = address.address.minimum;
+		res->end = address.address.minimum + address.address.address_length - 1;
 	}
 
 	return AE_OK;
···
 	if (hotadd) {
 		pcibios_resource_survey_bus(root->bus);
 		pci_assign_unassigned_root_bus_resources(root->bus);
+		acpi_ioapic_add(root);
 	}
 
 	pci_lock_rescan_remove();
···
 	pci_lock_rescan_remove();
 
 	pci_stop_root_bus(root->bus);
+
+	WARN_ON(acpi_ioapic_remove(root));
 
 	device_set_run_wake(root->bus->bridge, false);
 	pci_acpi_remove_bus_pm_notifier(device);

drivers/acpi/processor_core.c

···
  *
  *	Alex Chiang <[e-mail]>
  *	- Unified x86/ia64 implementations
+ *
+ * I/O APIC hotplug support
+ *	Yinghai Lu <[e-mail]>
+ *	Jiang Liu <[e-mail]>
  */
 #include <linux/export.h>
 #include <linux/acpi.h>
···
 
 #define _COMPONENT		ACPI_PROCESSOR_COMPONENT
 ACPI_MODULE_NAME("processor_core");
+
+static struct acpi_table_madt *get_madt_table(void)
+{
+	static struct acpi_table_madt *madt;
+	static int read_madt;
+
+	if (!read_madt) {
+		if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
+					(struct acpi_table_header **)&madt)))
+			madt = NULL;
+		read_madt++;
+	}
+
+	return madt;
+}
 
 static int map_lapic_id(struct acpi_subtable_header *entry,
 		 u32 acpi_id, int *apic_id)
···
 static int map_madt_entry(int type, u32 acpi_id)
 {
 	unsigned long madt_end, entry;
-	static struct acpi_table_madt *madt;
-	static int read_madt;
 	int phys_id = -1;	/* CPU hardware ID */
+	struct acpi_table_madt *madt;
 
-	if (!read_madt) {
-		if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
-					(struct acpi_table_header **)&madt)))
-			madt = NULL;
-		read_madt++;
-	}
-
+	madt = get_madt_table();
 	if (!madt)
 		return phys_id;
 
···
 	return acpi_map_cpuid(phys_id, acpi_id);
 }
 EXPORT_SYMBOL_GPL(acpi_get_cpuid);
+
+#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
+static int get_ioapic_id(struct acpi_subtable_header *entry, u32 gsi_base,
+			 u64 *phys_addr, int *ioapic_id)
+{
+	struct acpi_madt_io_apic *ioapic = (struct acpi_madt_io_apic *)entry;
+
+	if (ioapic->global_irq_base != gsi_base)
+		return 0;
+
+	*phys_addr = ioapic->address;
+	*ioapic_id = ioapic->id;
+	return 1;
+}
+
+static int parse_madt_ioapic_entry(u32 gsi_base, u64 *phys_addr)
+{
+	struct acpi_subtable_header *hdr;
+	unsigned long madt_end, entry;
+	struct acpi_table_madt *madt;
+	int apic_id = -1;
+
+	madt = get_madt_table();
+	if (!madt)
+		return apic_id;
+
+	entry = (unsigned long)madt;
+	madt_end = entry + madt->header.length;
+
+	/* Parse all entries looking for a match. */
+	entry += sizeof(struct acpi_table_madt);
+	while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
+		hdr = (struct acpi_subtable_header *)entry;
+		if (hdr->type == ACPI_MADT_TYPE_IO_APIC &&
+		    get_ioapic_id(hdr, gsi_base, phys_addr, &apic_id))
+			break;
+		else
+			entry += hdr->length;
+	}
+
+	return apic_id;
+}
+
+static int parse_mat_ioapic_entry(acpi_handle handle, u32 gsi_base,
+				  u64 *phys_addr)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_subtable_header *header;
+	union acpi_object *obj;
+	int apic_id = -1;
+
+	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
+		goto exit;
+
+	if (!buffer.length || !buffer.pointer)
+		goto exit;
+
+	obj = buffer.pointer;
+	if (obj->type != ACPI_TYPE_BUFFER ||
+	    obj->buffer.length < sizeof(struct acpi_subtable_header))
+		goto exit;
+
+	header = (struct acpi_subtable_header *)obj->buffer.pointer;
+	if (header->type == ACPI_MADT_TYPE_IO_APIC)
+		get_ioapic_id(header, gsi_base, phys_addr, &apic_id);
+
+exit:
+	kfree(buffer.pointer);
+	return apic_id;
+}
+
+/**
+ * acpi_get_ioapic_id - Get IOAPIC ID and physical address matching @gsi_base
+ * @handle:	ACPI object for IOAPIC device
+ * @gsi_base:	GSI base to match with
+ * @phys_addr:	Pointer to store physical address of matching IOAPIC record
+ *
+ * Walk resources returned by ACPI_MAT method, then ACPI MADT table, to search
+ * for an ACPI IOAPIC record matching @gsi_base.
+ * Return IOAPIC id and store physical address in @phys_addr if found a match,
+ * otherwise return <0.
+ */
+int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr)
+{
+	int apic_id;
+
+	apic_id = parse_mat_ioapic_entry(handle, gsi_base, phys_addr);
+	if (apic_id == -1)
+		apic_id = parse_madt_ioapic_entry(gsi_base, phys_addr);
+
+	return apic_id;
+}
+#endif /* CONFIG_ACPI_HOTPLUG_IOAPIC */

drivers/acpi/processor_idle.c

···
 }
 
 /**
- * acpi_idle_do_entry - a helper function that does C2 and C3 type entry
+ * acpi_idle_do_entry - enter idle state using the appropriate method
  * @cx: cstate data
  *
  * Caller disables interrupt before call and enables interrupt after return.
  */
-static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
+static void acpi_idle_do_entry(struct acpi_processor_cx *cx)
 {
-	/* Don't trace irqs off for idle */
-	stop_critical_timings();
 	if (cx->entry_method == ACPI_CSTATE_FFH) {
 		/* Call into architectural FFH based C-state */
 		acpi_processor_ffh_cstate_enter(cx);
···
 		   gets asserted in time to freeze execution properly. */
 		inl(acpi_gbl_FADT.xpm_timer_block.address);
 	}
-	start_critical_timings();
 }
-
-/**
- * acpi_idle_enter_c1 - enters an ACPI C1 state-type
- * @dev: the target CPU
- * @drv: cpuidle driver containing cpuidle state info
- * @index: index of target state
- *
- * This is equivalent to the HALT instruction.
- */
-static int acpi_idle_enter_c1(struct cpuidle_device *dev,
-		struct cpuidle_driver *drv, int index)
-{
-	struct acpi_processor *pr;
-	struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
-
-	pr = __this_cpu_read(processors);
-
-	if (unlikely(!pr))
-		return -EINVAL;
-
-	lapic_timer_state_broadcast(pr, cx, 1);
-	acpi_idle_do_entry(cx);
-
-	lapic_timer_state_broadcast(pr, cx, 0);
-
-	return index;
-}
-
 
 /**
  * acpi_idle_play_dead - enters an ACPI state for long-term idle (i.e. off-lining)
···
 	return 0;
 }
 
-/**
- * acpi_idle_enter_simple - enters an ACPI state without BM handling
- * @dev: the target CPU
- * @drv: cpuidle driver with cpuidle state information
- * @index: the index of suggested state
- */
-static int acpi_idle_enter_simple(struct cpuidle_device *dev,
-		struct cpuidle_driver *drv, int index)
+static bool acpi_idle_fallback_to_c1(struct acpi_processor *pr)
 {
-	struct acpi_processor *pr;
-	struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
-
-	pr = __this_cpu_read(processors);
-
-	if (unlikely(!pr))
-		return -EINVAL;
-
-#ifdef CONFIG_HOTPLUG_CPU
-	if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
-	    !pr->flags.has_cst &&
-	    !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
-		return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START);
-#endif
-
-	/*
-	 * Must be done before busmaster disable as we might need to
-	 * access HPET !
-	 */
-	lapic_timer_state_broadcast(pr, cx, 1);
-
-	if (cx->type == ACPI_STATE_C3)
-		ACPI_FLUSH_CPU_CACHE();
-
-	/* Tell the scheduler that we are going deep-idle: */
-	sched_clock_idle_sleep_event();
-	acpi_idle_do_entry(cx);
-
-	sched_clock_idle_wakeup_event(0);
-
-	lapic_timer_state_broadcast(pr, cx, 0);
-	return index;
+	return IS_ENABLED(CONFIG_HOTPLUG_CPU) && num_online_cpus() > 1 &&
+		!(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED) &&
+		!pr->flags.has_cst;
 }
 
 static int c3_cpu_count;
···
 
 /**
  * acpi_idle_enter_bm - enters C3 with proper BM handling
- * @dev: the target CPU
- * @drv: cpuidle driver containing state data
- * @index: the index of suggested state
- *
- * If BM is detected, the deepest non-C3 idle state is entered instead.
+ * @pr: Target processor
+ * @cx: Target state context
  */
-static int acpi_idle_enter_bm(struct cpuidle_device *dev,
-		struct cpuidle_driver *drv, int index)
+static void acpi_idle_enter_bm(struct acpi_processor *pr,
+			       struct acpi_processor_cx *cx)
 {
-	struct acpi_processor *pr;
-	struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
-
-	pr = __this_cpu_read(processors);
-
-	if (unlikely(!pr))
-		return -EINVAL;
-
-#ifdef CONFIG_HOTPLUG_CPU
-	if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
-	    !pr->flags.has_cst &&
-	    !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
-		return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START);
-#endif
-
-	if (!cx->bm_sts_skip && acpi_idle_bm_check()) {
-		if (drv->safe_state_index >= 0) {
-			return drv->states[drv->safe_state_index].enter(dev,
-						drv, drv->safe_state_index);
-		} else {
-			acpi_safe_halt();
-			return -EBUSY;
-		}
-	}
-
 	acpi_unlazy_tlb(smp_processor_id());
 
-	/* Tell the scheduler that we are going deep-idle: */
-	sched_clock_idle_sleep_event();
 	/*
 	 * Must be done before busmaster disable as we might need to
 	 * access HPET !
···
 	/*
 	 * disable bus master
 	 * bm_check implies we need ARB_DIS
-	 * !bm_check implies we need cache flush
 	 * bm_control implies whether we can do ARB_DIS
 	 *
 	 * That leaves a case where bm_check is set and bm_control is
 	 * not set. In that case we cannot do much, we enter C3
 	 * without doing anything.
 	 */
-	if (pr->flags.bm_check && pr->flags.bm_control) {
+	if (pr->flags.bm_control) {
 		raw_spin_lock(&c3_lock);
 		c3_cpu_count++;
 		/* Disable bus master arbitration when all CPUs are in C3 */
 		if (c3_cpu_count == num_online_cpus())
 			acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
 		raw_spin_unlock(&c3_lock);
-	} else if (!pr->flags.bm_check) {
-		ACPI_FLUSH_CPU_CACHE();
 	}
 
 	acpi_idle_do_entry(cx);
 
 	/* Re-enable bus master arbitration */
-	if (pr->flags.bm_check && pr->flags.bm_control) {
+	if (pr->flags.bm_control) {
 		raw_spin_lock(&c3_lock);
 		acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
 		c3_cpu_count--;
 		raw_spin_unlock(&c3_lock);
 	}
 
-	sched_clock_idle_wakeup_event(0);
+	lapic_timer_state_broadcast(pr, cx, 0);
+}
+
+static int acpi_idle_enter(struct cpuidle_device *dev,
+			   struct cpuidle_driver *drv, int index)
+{
+	struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
+	struct acpi_processor *pr;
+
+	pr = __this_cpu_read(processors);
+	if (unlikely(!pr))
+		return -EINVAL;
+
+	if (cx->type != ACPI_STATE_C1) {
+		if (acpi_idle_fallback_to_c1(pr)) {
+			index = CPUIDLE_DRIVER_STATE_START;
+			cx = per_cpu(acpi_cstate[index], dev->cpu);
+		} else if (cx->type == ACPI_STATE_C3 && pr->flags.bm_check) {
+			if (cx->bm_sts_skip || !acpi_idle_bm_check()) {
+				acpi_idle_enter_bm(pr, cx);
+				return index;
+			} else if (drv->safe_state_index >= 0) {
+				index = drv->safe_state_index;
+				cx = per_cpu(acpi_cstate[index], dev->cpu);
+			} else {
+				acpi_safe_halt();
+				return -EBUSY;
+			}
+		}
+	}
+
+	lapic_timer_state_broadcast(pr, cx, 1);
+
+	if (cx->type == ACPI_STATE_C3)
+		ACPI_FLUSH_CPU_CACHE();
+
+	acpi_idle_do_entry(cx);
 
 	lapic_timer_state_broadcast(pr, cx, 0);
+
 	return index;
 }
 
···
 		strncpy(state->desc, cx->desc, CPUIDLE_DESC_LEN);
 		state->exit_latency = cx->latency;
 		state->target_residency = cx->latency * latency_factor;
+		state->enter = acpi_idle_enter;
 
 		state->flags = 0;
-		switch (cx->type) {
-			case ACPI_STATE_C1:
-
-			state->enter = acpi_idle_enter_c1;
+		if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2) {
 			state->enter_dead = acpi_idle_play_dead;
 			drv->safe_state_index = count;
-			break;
-
-			case ACPI_STATE_C2:
-			state->enter = acpi_idle_enter_simple;
-			state->enter_dead = acpi_idle_play_dead;
-			drv->safe_state_index = count;
-			break;
-
-			case ACPI_STATE_C3:
-			state->enter = pr->flags.bm_check ?
-					acpi_idle_enter_bm :
-					acpi_idle_enter_simple;
-			break;
 		}
 
 		count++;

drivers/acpi/resource.c

···
 #define valid_IRQ(i) (true)
 #endif
 
-static unsigned long acpi_dev_memresource_flags(u64 len, u8 write_protect,
-						bool window)
+static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
 {
-	unsigned long flags = IORESOURCE_MEM;
+	u64 reslen = end - start + 1;
 
-	if (len == 0)
-		flags |= IORESOURCE_DISABLED;
+	/*
+	 * CHECKME: len might be required to check versus a minimum
+	 * length as well. 1 for io is fine, but for memory it does
+	 * not make any sense at all.
+	 */
+	if (len && reslen && reslen == len && start <= end)
+		return true;
+
+	pr_info("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
+		io ? "io" : "mem", start, end, len);
+
+	return false;
+}
+
+static void acpi_dev_memresource_flags(struct resource *res, u64 len,
+				       u8 write_protect)
+{
+	res->flags = IORESOURCE_MEM;
+
+	if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
+		res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 
 	if (write_protect == ACPI_READ_WRITE_MEMORY)
-		flags |= IORESOURCE_MEM_WRITEABLE;
-
-	if (window)
-		flags |= IORESOURCE_WINDOW;
-
-	return flags;
+		res->flags |= IORESOURCE_MEM_WRITEABLE;
 }
 
 static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
···
 {
 	res->start = start;
 	res->end = start + len - 1;
-	res->flags = acpi_dev_memresource_flags(len, write_protect, false);
+	acpi_dev_memresource_flags(res, len, write_protect);
 }
 
 /**
···
  * Check if the given ACPI resource object represents a memory resource and
  * if that's the case, use the information in it to populate the generic
  * resource object pointed to by @res.
+ *
+ * Return:
+ * 1) false with res->flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
 {
···
 	switch (ares->type) {
 	case ACPI_RESOURCE_TYPE_MEMORY24:
 		memory24 = &ares->data.memory24;
-		if (!memory24->minimum && !memory24->address_length)
-			return false;
-		acpi_dev_get_memresource(res, memory24->minimum,
-					 memory24->address_length,
+		acpi_dev_get_memresource(res, memory24->minimum << 8,
+					 memory24->address_length << 8,
 					 memory24->write_protect);
 		break;
 	case ACPI_RESOURCE_TYPE_MEMORY32:
 		memory32 = &ares->data.memory32;
-		if (!memory32->minimum && !memory32->address_length)
-			return false;
 		acpi_dev_get_memresource(res, memory32->minimum,
 					 memory32->address_length,
 					 memory32->write_protect);
 		break;
 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 		fixed_memory32 = &ares->data.fixed_memory32;
-		if (!fixed_memory32->address && !fixed_memory32->address_length)
-			return false;
 		acpi_dev_get_memresource(res, fixed_memory32->address,
 					 fixed_memory32->address_length,
 					 fixed_memory32->write_protect);
 		break;
 	default:
+		res->flags = 0;
 		return false;
 	}
-	return true;
+
+	return !(res->flags & IORESOURCE_DISABLED);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
 
-static unsigned int acpi_dev_ioresource_flags(u64 start, u64 end, u8 io_decode,
-					      bool window)
+static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
+				      u8 io_decode)
 {
-	int flags = IORESOURCE_IO;
+	res->flags = IORESOURCE_IO;
+
+	if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
+		res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
+
+	if (res->end >= 0x10003)
+		res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 
 	if (io_decode == ACPI_DECODE_16)
-		flags |= IORESOURCE_IO_16BIT_ADDR;
-
-	if (start > end || end >= 0x10003)
-		flags |= IORESOURCE_DISABLED;
-
-	if (window)
-		flags |= IORESOURCE_WINDOW;
-
-	return flags;
+		res->flags |= IORESOURCE_IO_16BIT_ADDR;
 }
 
 static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
 				    u8 io_decode)
 {
-	u64 end = start + len - 1;
-
 	res->start = start;
-	res->end = end;
-	res->flags = acpi_dev_ioresource_flags(start, end, io_decode, false);
+	res->end = start + len - 1;
+	acpi_dev_ioresource_flags(res, len, io_decode);
 }
 
 /**
···
  * Check if the given ACPI resource object represents an I/O resource and
  * if that's the case, use the information in it to populate the generic
  * resource object pointed to by @res.
+ *
+ * Return:
+ * 1) false with res->flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
 {
···
 	switch (ares->type) {
 	case ACPI_RESOURCE_TYPE_IO:
 		io = &ares->data.io;
-		if (!io->minimum && !io->address_length)
-			return false;
 		acpi_dev_get_ioresource(res, io->minimum,
 					io->address_length,
 					io->io_decode);
 		break;
 	case ACPI_RESOURCE_TYPE_FIXED_IO:
 		fixed_io = &ares->data.fixed_io;
-		if (!fixed_io->address && !fixed_io->address_length)
-			return false;
 		acpi_dev_get_ioresource(res, fixed_io->address,
 					fixed_io->address_length,
 					ACPI_DECODE_10);
 		break;
 	default:
+		res->flags = 0;
 		return false;
 	}
-	return true;
+
+	return !(res->flags & IORESOURCE_DISABLED);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
 
-/**
- * acpi_dev_resource_address_space - Extract ACPI address space information.
- * @ares: Input ACPI resource object.
- * @res: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an address space resource
- * and if that's the case, use the information in it to populate the generic
- * resource object pointed to by @res.
- */
-bool acpi_dev_resource_address_space(struct acpi_resource *ares,
-				     struct resource *res)
+static bool acpi_decode_space(struct resource_win *win,
+			      struct acpi_resource_address *addr,
+			      struct acpi_address64_attribute *attr)
 {
-	acpi_status status;
-	struct acpi_resource_address64 addr;
-	bool window;
-	u64 len;
-	u8 io_decode;
+	u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
+	bool wp = addr->info.mem.write_protect;
+	u64 len = attr->address_length;
+	struct resource *res = &win->res;
 
-	switch (ares->type) {
-	case ACPI_RESOURCE_TYPE_ADDRESS16:
-	case ACPI_RESOURCE_TYPE_ADDRESS32:
-	case ACPI_RESOURCE_TYPE_ADDRESS64:
-		break;
-	default:
-		return false;
+	/*
+	 * Filter out invalid descriptor according to ACPI Spec 5.0, section
+	 * 6.4.3.5 Address Space Resource Descriptors.
+	 */
+	if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
+	    (addr->min_address_fixed && addr->max_address_fixed && !len))
+		pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
+			 addr->min_address_fixed, addr->max_address_fixed, len);
+
+	res->start = attr->minimum;
+	res->end = attr->maximum;
+
+	/*
+	 * For bridges that translate addresses across the bridge,
+	 * translation_offset is the offset that must be added to the
+	 * address on the secondary side to obtain the address on the
+	 * primary side. Non-bridge devices must list 0 for all Address
+	 * Translation offset bits.
+	 */
+	if (addr->producer_consumer == ACPI_PRODUCER) {
+		res->start += attr->translation_offset;
+		res->end += attr->translation_offset;
+	} else if (attr->translation_offset) {
+		pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
+			 attr->translation_offset);
 	}
 
-	status = acpi_resource_to_address64(ares, &addr);
-	if (ACPI_FAILURE(status))
-		return false;
-
-	res->start = addr.minimum;
-	res->end = addr.maximum;
-	window = addr.producer_consumer == ACPI_PRODUCER;
-
-	switch(addr.resource_type) {
+	switch (addr->resource_type) {
 	case ACPI_MEMORY_RANGE:
-		len = addr.maximum - addr.minimum + 1;
-		res->flags = acpi_dev_memresource_flags(len,
-						addr.info.mem.write_protect,
-						window);
+		acpi_dev_memresource_flags(res, len, wp);
 		break;
 	case ACPI_IO_RANGE:
-		io_decode = addr.granularity == 0xfff ?
-				ACPI_DECODE_10 : ACPI_DECODE_16;
-		res->flags = acpi_dev_ioresource_flags(addr.minimum,
-						       addr.maximum,
-						       io_decode, window);
+		acpi_dev_ioresource_flags(res, len, iodec);
 		break;
 	case ACPI_BUS_NUMBER_RANGE:
 		res->flags = IORESOURCE_BUS;
 		break;
 	default:
-		res->flags = 0;
+		return false;
 	}
 
-	return true;
+	win->offset = attr->translation_offset;
+
+	if (addr->producer_consumer == ACPI_PRODUCER)
+		res->flags |= IORESOURCE_WINDOW;
+
+	if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
+		res->flags |= IORESOURCE_PREFETCH;
+
+	return !(res->flags & IORESOURCE_DISABLED);
+}
+
+/**
+ * acpi_dev_resource_address_space - Extract ACPI address space information.
+ * @ares: Input ACPI resource object.
+ * @win: Output generic resource object.
+ *
+ * Check if the given ACPI resource object represents an address space resource
+ * and if that's the case, use the information in it to populate the generic
+ * resource object pointed to by @win.
+ *
+ * Return:
+ * 1) false with win->res.flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
+ *    resource
+ * 3) true: valid assigned resource
+ */
+bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+				     struct resource_win *win)
+{
+	struct acpi_resource_address64 addr;
+
+	win->res.flags = 0;
+	if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
+		return false;
+
+	return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
+				 &addr.address);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
 
 /**
  * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
  * @ares: Input ACPI resource object.
- * @res: Output generic resource object.
+ * @win: Output generic resource object.
  *
  * Check if the given ACPI resource object represents an extended address space
  * resource and if that's the case, use the information in it to populate the
- * generic resource object pointed to by @res.
+ * generic resource object pointed to by @win.
+ *
+ * Return:
+ * 1) false with win->res.flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
+ *    resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
-					 struct resource *res)
+					 struct resource_win *win)
 {
 	struct acpi_resource_extended_address64 *ext_addr;
-	bool window;
-	u64 len;
-	u8 io_decode;
 
+	win->res.flags = 0;
 	if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
 		return false;
 
 	ext_addr = &ares->data.ext_address64;
 
-	res->start = ext_addr->minimum;
-	res->end = ext_addr->maximum;
-	window = ext_addr->producer_consumer == ACPI_PRODUCER;
-
-	switch(ext_addr->resource_type) {
-	case ACPI_MEMORY_RANGE:
-		len = ext_addr->maximum - ext_addr->minimum + 1;
-		res->flags = acpi_dev_memresource_flags(len,
-					ext_addr->info.mem.write_protect,
-					window);
-		break;
-	case ACPI_IO_RANGE:
-		io_decode = ext_addr->granularity == 0xfff ?
-				ACPI_DECODE_10 : ACPI_DECODE_16;
-		res->flags = acpi_dev_ioresource_flags(ext_addr->minimum,
-						       ext_addr->maximum,
-						       io_decode, window);
-		break;
-	case ACPI_BUS_NUMBER_RANGE:
-		res->flags = IORESOURCE_BUS;
-		break;
-	default:
-		res->flags = 0;
-	}
-
-	return true;
+	return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
+				 &ext_addr->address);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
 
···
 {
 	res->start = gsi;
 	res->end = gsi;
-	res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED;
+	res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
 }
 
 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
···
  * represented by the resource and populate the generic resource object pointed
  * to by @res accordingly.  If the registration of the GSI is not successful,
  * IORESOURCE_DISABLED will be set it that object's flags.
+ *
+ * Return:
+ * 1) false with res->flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 				 struct resource *res)
···
 					 ext_irq->sharable, false);
 		break;
 	default:
+		res->flags = 0;
 		return false;
 	}
 
···
  */
 void acpi_dev_free_resource_list(struct list_head *list)
 {
-	struct resource_list_entry *rentry, *re;
-
-	list_for_each_entry_safe(rentry, re, list, node) {
-		list_del(&rentry->node);
-		kfree(rentry);
-	}
+	resource_list_free(list);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
 
···
 	int error;
 };
 
-static acpi_status acpi_dev_new_resource_entry(struct resource *r,
+static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
 					       struct res_proc_context *c)
 {
-	struct resource_list_entry *rentry;
+	struct resource_entry *rentry;
 
-	rentry = kmalloc(sizeof(*rentry), GFP_KERNEL);
+	rentry = resource_list_create_entry(NULL, 0);
 	if (!rentry) {
 		c->error = -ENOMEM;
 		return AE_NO_MEMORY;
 	}
-	rentry->res = *r;
-	list_add_tail(&rentry->node, c->list);
+	*rentry->res = win->res;
+	rentry->offset = win->offset;
+	resource_list_add_tail(rentry, c->list);
 	c->count++;
 	return AE_OK;
 }
···
 					     void *context)
 {
 	struct res_proc_context *c = context;
-	struct resource r;
+	struct resource_win win;
+	struct resource *res = &win.res;
 	int i;
 
 	if (c->preproc) {
···
 		}
 	}
 
-	memset(&r, 0, sizeof(r));
+	memset(&win, 0, sizeof(win));
 
-	if (acpi_dev_resource_memory(ares, &r)
-	    || acpi_dev_resource_io(ares, &r)
-	    || acpi_dev_resource_address_space(ares, &r)
-	    || acpi_dev_resource_ext_address_space(ares, &r))
-		return acpi_dev_new_resource_entry(&r, c);
+	if (acpi_dev_resource_memory(ares, res)
+	    || acpi_dev_resource_io(ares, res)
+	    || acpi_dev_resource_address_space(ares, &win)
+	    || acpi_dev_resource_ext_address_space(ares, &win))
+		return acpi_dev_new_resource_entry(&win, c);
 
-	for (i = 0; acpi_dev_resource_interrupt(ares, i, &r); i++) {
+	for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
 		acpi_status status;
 
-		status = acpi_dev_new_resource_entry(&r, c);
+		status = acpi_dev_new_resource_entry(&win, c);
 		if (ACPI_FAILURE(status))
 			return status;
 	}
···
  * returned as the final error code.
  *
  * The resultant struct resource objects are put on the list pointed to by
- * @list, that must be empty initially, as members of struct resource_list_entry
+ * @list, that must be empty initially, as members of struct resource_entry
  * objects.  Callers of this routine should use %acpi_dev_free_resource_list() to
  * free that list.
  *
···
 	return c.count;
 }
 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
+
+/**
+ * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
+ *				   types
+ * @ares: Input ACPI resource object.
+ * @types: Valid resource types of IORESOURCE_XXX
+ *
+ * This is a hepler function to support acpi_dev_get_resources(), which filters
+ * ACPI resource objects according to resource types.
+ */
+int acpi_dev_filter_resource_type(struct acpi_resource *ares,
+				  unsigned long types)
+{
+	unsigned long type = 0;
+
+	switch (ares->type) {
+	case ACPI_RESOURCE_TYPE_MEMORY24:
+	case ACPI_RESOURCE_TYPE_MEMORY32:
+	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+		type = IORESOURCE_MEM;
+		break;
+	case ACPI_RESOURCE_TYPE_IO:
+	case ACPI_RESOURCE_TYPE_FIXED_IO:
+		type = IORESOURCE_IO;
+		break;
+	case ACPI_RESOURCE_TYPE_IRQ:
+	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+		type = IORESOURCE_IRQ;
+		break;
+	case ACPI_RESOURCE_TYPE_DMA:
+	case ACPI_RESOURCE_TYPE_FIXED_DMA:
+		type = IORESOURCE_DMA;
+		break;
+	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+		type = IORESOURCE_REG;
+		break;
+	case ACPI_RESOURCE_TYPE_ADDRESS16:
+	case ACPI_RESOURCE_TYPE_ADDRESS32:
+	case ACPI_RESOURCE_TYPE_ADDRESS64:
+	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+		if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
+			type = IORESOURCE_MEM;
+		else if (ares->data.address.resource_type == ACPI_IO_RANGE)
+			type = IORESOURCE_IO;
+		else if (ares->data.address.resource_type ==
+			 ACPI_BUS_NUMBER_RANGE)
+			type = IORESOURCE_BUS;
+		break;
+	default:
+		break;
+	}
+
+	return (type & types) ? 0 : 1;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);

drivers/acpi/scan.c

···
 	acpi_pci_link_init();
 	acpi_processor_init();
 	acpi_lpss_init();
+	acpi_apd_init();
 	acpi_cmos_rtc_init();
 	acpi_container_init();
 	acpi_memory_hotplug_init();

drivers/acpi/sleep.c

···
 	{},
 };
 
-static void acpi_sleep_dmi_check(void)
+static void __init acpi_sleep_dmi_check(void)
 {
 	int year;
 

drivers/acpi/video.c

···
 		DMI_MATCH(DMI_PRODUCT_NAME, "370R4E/370R4V/370R5E/3570RE/370R5V"),
 		},
 	},
+	{
+	 /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
+	 .callback = video_disable_native_backlight,
+	 .ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "3570R/370R/470R/450R/510R/4450RV"),
+		},
+	},
+	{
+	 /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
+	 .callback = video_disable_native_backlight,
+	 .ident = "SAMSUNG 730U3E/740U3E",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
+		},
+	},
 
 	{
 	 /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */

drivers/base/power/common.c

···
  * @dev: Device to handle.
  *
  * If power.subsys_data is NULL, point it to a new object, otherwise increment
- * its reference counter.  Return 1 if a new object has been created, otherwise
- * return 0 or error code.
+ * its reference counter.  Return 0 if new object has been created or refcount
+ * increased, otherwise negative error code.
  */
 int dev_pm_get_subsys_data(struct device *dev)
 {
···
  * @dev: Device to handle.
  *
  * If the reference counter of power.subsys_data is zero after dropping the
- * reference, power.subsys_data is removed.  Return 1 if that happens or 0
- * otherwise.
+ * reference, power.subsys_data is removed.
  */
-int dev_pm_put_subsys_data(struct device *dev)
+void dev_pm_put_subsys_data(struct device *dev)
 {
 	struct pm_subsys_data *psd;
-	int ret = 1;
 
 	spin_lock_irq(&dev->power.lock);
 
···
 	if (!psd)
 		goto out;
 
-	if (--psd->refcount == 0) {
+	if (--psd->refcount == 0)
 		dev->power.subsys_data = NULL;
-	} else {
+	else
 		psd = NULL;
-		ret = 0;
-	}
 
  out:
 	spin_unlock_irq(&dev->power.lock);
 	kfree(psd);
-
-	return ret;
 }
 EXPORT_SYMBOL_GPL(dev_pm_put_subsys_data);
 

drivers/base/power/domain.c

···
 	struct device *dev;
 
 	gpd_data = container_of(nb, struct generic_pm_domain_data, nb);
-
-	mutex_lock(&gpd_data->lock);
 	dev = gpd_data->base.dev;
-	if (!dev) {
-		mutex_unlock(&gpd_data->lock);
-		return NOTIFY_DONE;
-	}
-	mutex_unlock(&gpd_data->lock);
 
 	for (;;) {
 		struct generic_pm_domain *genpd;
···
 
 #endif /* CONFIG_PM_SLEEP */
 
-static struct generic_pm_domain_data *__pm_genpd_alloc_dev_data(struct device *dev)
+static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
+					struct generic_pm_domain *genpd,
+					struct gpd_timing_data *td)
 {
 	struct generic_pm_domain_data *gpd_data;
+	int ret;
+
+	ret = dev_pm_get_subsys_data(dev);
+	if (ret)
+		return ERR_PTR(ret);
 
 	gpd_data = kzalloc(sizeof(*gpd_data), GFP_KERNEL);
-	if (!gpd_data)
-		return NULL;
+	if (!gpd_data) {
+		ret = -ENOMEM;
+		goto err_put;
+	}
 
-	mutex_init(&gpd_data->lock);
+	if (td)
+		gpd_data->td = *td;
+
+	gpd_data->base.dev = dev;
+	gpd_data->need_restore = -1;
+	gpd_data->td.constraint_changed = true;
+	gpd_data->td.effective_constraint_ns = -1;
 	gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
-	dev_pm_qos_add_notifier(dev, &gpd_data->nb);
+
+	spin_lock_irq(&dev->power.lock);
+
+	if (dev->power.subsys_data->domain_data) {
+		ret = -EINVAL;
+		goto err_free;
+	}
+
+	dev->power.subsys_data->domain_data = &gpd_data->base;
+	dev->pm_domain = &genpd->domain;
+
+	spin_unlock_irq(&dev->power.lock);
+
 	return gpd_data;
+
+ err_free:
+	spin_unlock_irq(&dev->power.lock);
+	kfree(gpd_data);
+ err_put:
+	dev_pm_put_subsys_data(dev);
+	return ERR_PTR(ret);
 }
 
-static void __pm_genpd_free_dev_data(struct device *dev,
-				     struct generic_pm_domain_data *gpd_data)
+static void genpd_free_dev_data(struct device *dev,
+				struct generic_pm_domain_data *gpd_data)
 {
-	dev_pm_qos_remove_notifier(dev, &gpd_data->nb);
+	spin_lock_irq(&dev->power.lock);
+
+	dev->pm_domain = NULL;
+	dev->power.subsys_data->domain_data = NULL;
+
+	spin_unlock_irq(&dev->power.lock);
+
 	kfree(gpd_data);
+	dev_pm_put_subsys_data(dev);
 }
 
 /**
···
 int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
 			  struct gpd_timing_data *td)
 {
-	struct generic_pm_domain_data *gpd_data_new, *gpd_data = NULL;
-	struct pm_domain_data *pdd;
+	struct generic_pm_domain_data *gpd_data;
 	int ret = 0;
 
 	dev_dbg(dev, "%s()\n", __func__);
···
 	if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev))
 		return -EINVAL;
 
-	gpd_data_new = __pm_genpd_alloc_dev_data(dev);
-	if (!gpd_data_new)
-		return -ENOMEM;
+	gpd_data = genpd_alloc_dev_data(dev, genpd, td);
+	if (IS_ERR(gpd_data))
+		return PTR_ERR(gpd_data);
 
 	genpd_acquire_lock(genpd);
 
···
 		goto out;
 	}
 
-	list_for_each_entry(pdd, &genpd->dev_list, list_node)
-		if (pdd->dev == dev) {
-			ret = -EINVAL;
-			goto out;
-		}
-
-	ret = dev_pm_get_subsys_data(dev);
+	ret = genpd->attach_dev ? genpd->attach_dev(genpd, dev) : 0;
 	if (ret)
 		goto out;
 
 	genpd->device_count++;
 	genpd->max_off_time_changed = true;
 
-	spin_lock_irq(&dev->power.lock);
-
-	dev->pm_domain = &genpd->domain;
-	if (dev->power.subsys_data->domain_data) {
-		gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
-	} else {
-		gpd_data = gpd_data_new;
-		dev->power.subsys_data->domain_data = &gpd_data->base;
-	}
-	gpd_data->refcount++;
-	if (td)
-		gpd_data->td = *td;
-
-	spin_unlock_irq(&dev->power.lock);
-
-	if (genpd->attach_dev)
-		genpd->attach_dev(genpd, dev);
-
-	mutex_lock(&gpd_data->lock);
-	gpd_data->base.dev = dev;
 	list_add_tail(&gpd_data->base.list_node, &genpd->dev_list);
-	gpd_data->need_restore = -1;
-	gpd_data->td.constraint_changed = true;
-	gpd_data->td.effective_constraint_ns = -1;
-	mutex_unlock(&gpd_data->lock);
 
  out:
 	genpd_release_lock(genpd);
 
-	if (gpd_data != gpd_data_new)
-		__pm_genpd_free_dev_data(dev, gpd_data_new);
+	if (ret)
+		genpd_free_dev_data(dev, gpd_data);
+	else
+		dev_pm_qos_add_notifier(dev, &gpd_data->nb);
 
 	return ret;
 }
···
 {
 	struct generic_pm_domain_data *gpd_data;
 	struct pm_domain_data *pdd;
-	bool remove = false;
 	int ret = 0;
 
 	dev_dbg(dev, "%s()\n", __func__);
···
 	    ||  IS_ERR_OR_NULL(dev->pm_domain)
 	    ||  pd_to_genpd(dev->pm_domain) != genpd)
 		return -EINVAL;
+
+	/* The above validation also means we have existing domain_data. */
+	pdd = dev->power.subsys_data->domain_data;
+	gpd_data = to_gpd_data(pdd);
+	dev_pm_qos_remove_notifier(dev, &gpd_data->nb);
 
 	genpd_acquire_lock(genpd);
 
···
 	if (genpd->detach_dev)
 		genpd->detach_dev(genpd, dev);
 
-	spin_lock_irq(&dev->power.lock);
-
-	dev->pm_domain = NULL;
-	pdd = dev->power.subsys_data->domain_data;
 	list_del_init(&pdd->list_node);
-	gpd_data = to_gpd_data(pdd);
-	if (--gpd_data->refcount == 0) {
-		dev->power.subsys_data->domain_data = NULL;
-		remove = true;
-	}
-
-	spin_unlock_irq(&dev->power.lock);
-
-	mutex_lock(&gpd_data->lock);
-	pdd->dev = NULL;
-	mutex_unlock(&gpd_data->lock);
 
 	genpd_release_lock(genpd);
 
-	dev_pm_put_subsys_data(dev);
-	if (remove)
-		__pm_genpd_free_dev_data(dev, gpd_data);
+	genpd_free_dev_data(dev, gpd_data);
 
 	return 0;
 
  out:
 	genpd_release_lock(genpd);
+	dev_pm_qos_add_notifier(dev, &gpd_data->nb);
 
 	return ret;
 }
-
-/**
- * pm_genpd_dev_need_restore - Set/unset the device's "need restore" flag.
- * @dev: Device to set/unset the flag for.
- * @val: The new value of the device's "need restore" flag.
- */
-void pm_genpd_dev_need_restore(struct device *dev, bool val)
-{
-	struct pm_subsys_data *psd;
-	unsigned long flags;
-
-	spin_lock_irqsave(&dev->power.lock, flags);
-
-	psd = dev_to_psd(dev);
-	if (psd && psd->domain_data)
-		to_gpd_data(psd->domain_data)->need_restore = val ? 1 : 0;
-
-	spin_unlock_irqrestore(&dev->power.lock, flags);
-}
-EXPORT_SYMBOL_GPL(pm_genpd_dev_need_restore);
 
 /**
  * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain.

drivers/base/power/opp.c

···
 } while (0)
 
 /**
- * find_device_opp() - find device_opp struct using device pointer
+ * _find_device_opp() - find device_opp struct using device pointer
  * @dev:	device pointer used to lookup device OPPs
  *
  * Search list of device OPPs for one containing matching device. Does a RCU
  * reader operation to grab the pointer needed.
  *
- * Returns pointer to 'struct device_opp' if found, otherwise -ENODEV or
+ * Return: pointer to 'struct device_opp' if found, otherwise -ENODEV or
  * -EINVAL based on type of error.
  *
  * Locking: This function must be called under rcu_read_lock(). device_opp
  * is a RCU protected pointer. This means that device_opp is valid as long
  * as we are under RCU lock.
  */
-static struct device_opp *find_device_opp(struct device *dev)
+static struct device_opp *_find_device_opp(struct device *dev)
 {
 	struct device_opp *tmp_dev_opp, *dev_opp = ERR_PTR(-ENODEV);
 
···
  * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an available opp
  * @opp:	opp for which voltage has to be returned for
  *
- * Return voltage in micro volt corresponding to the opp, else
+ * Return: voltage in micro volt corresponding to the opp, else
  * return 0
  *
  * Locking: This function must be called under rcu_read_lock(). opp is a rcu
···
 	struct dev_pm_opp *tmp_opp;
 	unsigned long v = 0;
 
+	opp_rcu_lockdep_assert();
+
 	tmp_opp = rcu_dereference(opp);
 	if (unlikely(IS_ERR_OR_NULL(tmp_opp)) || !tmp_opp->available)
 		pr_err("%s: Invalid parameters\n", __func__);
···
  * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp
  * @opp:	opp for which frequency has to be returned for
  *
- * Return frequency in hertz corresponding to the opp, else
+ * Return: frequency in hertz corresponding to the opp, else
  * return 0
  *
  * Locking: This function must be called under rcu_read_lock(). opp is a rcu
···
 	struct dev_pm_opp *tmp_opp;
 	unsigned long f = 0;
 
+	opp_rcu_lockdep_assert();
+
 	tmp_opp = rcu_dereference(opp);
 	if (unlikely(IS_ERR_OR_NULL(tmp_opp)) || !tmp_opp->available)
 		pr_err("%s: Invalid parameters\n", __func__);
···
  * dev_pm_opp_get_opp_count() - Get number of opps available in the opp list
  * @dev:	device for which we do this operation
  *
- * This function returns the number of available opps if there are any,
+ * Return: This function returns the number of available opps if there are any,
  * else returns 0 if none or the corresponding error value.
  *
  * Locking: This function takes rcu_read_lock().
···
 
 	rcu_read_lock();
 
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp)) {
 		count = PTR_ERR(dev_opp);
 		dev_err(dev, "%s: device OPP not found (%d)\n",
···
  * @freq:		frequency to search for
  * @available:		true/false - match for available opp
  *
- * Searches for exact match in the opp list and returns pointer to the matching
- * opp if found, else returns ERR_PTR in case of error and should be handled
- * using IS_ERR. Error return values can be:
+ * Return: Searches for exact match in the opp list and returns pointer to the
+ * matching opp if found, else returns ERR_PTR in case of error and should
+ * be handled using IS_ERR. Error return values can be:
  * EINVAL:	for bad pointer
  * ERANGE:	no match found for search
  * ENODEV:	if device not found in list of registered devices
···
 
 	opp_rcu_lockdep_assert();
 
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp)) {
 		int r = PTR_ERR(dev_opp);
 		dev_err(dev, "%s: device OPP not found (%d)\n", __func__, r);
···
  * Search for the matching ceil *available* OPP from a starting freq
  * for a device.
  *
- * Returns matching *opp and refreshes *freq accordingly, else returns
+ * Return: matching *opp and refreshes *freq accordingly, else returns
  * ERR_PTR in case of error and should be handled using IS_ERR. Error return
  * values can be:
  * EINVAL:	for bad pointer
···
 		return ERR_PTR(-EINVAL);
 	}
 
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp))
 		return ERR_CAST(dev_opp);
 
···
  * Search for the matching floor *available* OPP from a starting freq
  * for a device.
  *
- * Returns matching *opp and refreshes *freq accordingly, else returns
+ * Return: matching *opp and refreshes *freq accordingly, else returns
  * ERR_PTR in case of error and should be handled using IS_ERR. Error return
  * values can be:
  * EINVAL:	for bad pointer
···
 		return ERR_PTR(-EINVAL);
 	}
 
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp))
 		return ERR_CAST(dev_opp);
 
···
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
 
-static struct device_opp *add_device_opp(struct device *dev)
+/**
+ * _add_device_opp() - Allocate a new device OPP table
+ * @dev:	device for which we do this operation
+ *
+ * New device node which uses OPPs - used when multiple devices with OPP tables
+ * are maintained.
+ *
+ * Return: valid device_opp pointer if success, else NULL.
+ */
+static struct device_opp *_add_device_opp(struct device *dev)
 {
 	struct device_opp *dev_opp;
 
···
 	return dev_opp;
 }
 
-static int dev_pm_opp_add_dynamic(struct device *dev, unsigned long freq,
-				  unsigned long u_volt, bool dynamic)
+/**
+ * _opp_add_dynamic() - Allocate a dynamic OPP.
+ * @dev:	device for which we do this operation
+ * @freq:	Frequency in Hz for this OPP
+ * @u_volt:	Voltage in uVolts for this OPP
+ * @dynamic:	Dynamically added OPPs.
+ *
+ * This function adds an opp definition to the opp list and returns status.
+ * The opp is made available by default and it can be controlled using
+ * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove.
+ *
+ * NOTE: "dynamic" parameter impacts OPPs added by the of_init_opp_table and
+ * freed by of_free_opp_table.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ *
+ * Return:
+ * 0		On success OR
+ *		Duplicate OPPs (both freq and volt are same) and opp->available
+ * -EEXIST	Freq are same and volt are different OR
+ *		Duplicate OPPs (both freq and volt are same) and !opp->available
+ * -ENOMEM	Memory allocation failure
+ */
+static int _opp_add_dynamic(struct device *dev, unsigned long freq,
+			    long u_volt, bool dynamic)
 {
 	struct device_opp *dev_opp = NULL;
 	struct dev_pm_opp *opp, *new_opp;
···
 	new_opp->dynamic = dynamic;
 
 	/* Check for existing list for 'dev' */
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp)) {
-		dev_opp = add_device_opp(dev);
+		dev_opp = _add_device_opp(dev);
 		if (!dev_opp) {
 			ret = -ENOMEM;
 			goto free_opp;
···
  * mutex cannot be locked.
  *
  * Return:
- * 0:		On success OR
+ * 0		On success OR
  *		Duplicate OPPs (both freq and volt are same) and opp->available
- * -EEXIST:	Freq are same and volt are different OR
+ * -EEXIST	Freq are same and volt are different OR
  *		Duplicate OPPs (both freq and volt are same) and !opp->available
- * -ENOMEM:	Memory allocation failure
+ * -ENOMEM	Memory allocation failure
  */
 int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
 {
-	return dev_pm_opp_add_dynamic(dev, freq, u_volt, true);
+	return _opp_add_dynamic(dev, freq, u_volt, true);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_add);
 
-static void kfree_opp_rcu(struct rcu_head *head)
+/**
+ * _kfree_opp_rcu() - Free OPP RCU handler
+ * @head:	RCU head
+ */
+static void _kfree_opp_rcu(struct rcu_head *head)
 {
 	struct dev_pm_opp *opp = container_of(head, struct dev_pm_opp, rcu_head);
 
 	kfree_rcu(opp, rcu_head);
 }
 
-static void kfree_device_rcu(struct rcu_head *head)
+/**
+ * _kfree_device_rcu() - Free device_opp RCU handler
+ * @head:	RCU head
+ */
+static void _kfree_device_rcu(struct rcu_head *head)
 {
 	struct device_opp *device_opp = container_of(head, struct device_opp, rcu_head);
 
 	kfree_rcu(device_opp, rcu_head);
 }
 
-static void __dev_pm_opp_remove(struct device_opp *dev_opp,
-				struct dev_pm_opp *opp)
+/**
+ * _opp_remove()  - Remove an OPP from a table definition
+ * @dev_opp:	points back to the device_opp struct this opp belongs to
+ * @opp:	pointer to the OPP to remove
+ *
+ * This function removes an opp definition from the opp list.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * It is assumed that the caller holds required mutex for an RCU updater
+ * strategy.
+ */
+static void _opp_remove(struct device_opp *dev_opp,
+			struct dev_pm_opp *opp)
 {
 	/*
 	 * Notify the changes in the availability of the operable
···
 	 */
 	srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_REMOVE, opp);
 	list_del_rcu(&opp->node);
-	call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, kfree_opp_rcu);
+	call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
 
 	if (list_empty(&dev_opp->opp_list)) {
 		list_del_rcu(&dev_opp->node);
 		call_srcu(&dev_opp->srcu_head.srcu, &dev_opp->rcu_head,
-			  kfree_device_rcu);
+			  _kfree_device_rcu);
 	}
 }
 
···
  * @freq:	OPP to remove with matching 'freq'
  *
  * This function removes an opp from the opp list.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
  */
 void dev_pm_opp_remove(struct device *dev, unsigned long freq)
 {
···
 	/* Hold our list modification lock here */
 	mutex_lock(&dev_opp_list_lock);
 
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp))
 		goto unlock;
 
···
 		goto unlock;
 	}
 
-	__dev_pm_opp_remove(dev_opp, opp);
+	_opp_remove(dev_opp, opp);
 unlock:
 	mutex_unlock(&dev_opp_list_lock);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
 
 /**
- * opp_set_availability() - helper to set the availability of an opp
+ * _opp_set_availability() - helper to set the availability of an opp
  * @dev:		device for which we do this operation
  * @freq:		OPP frequency to modify availability
  * @availability_req:	availability status requested for this opp
···
  * Set the availability of an OPP with an RCU operation, opp_{enable,disable}
  * share a common logic which is isolated here.
  *
- * Returns -EINVAL for bad pointers, -ENOMEM if no memory available for the
+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
  * copy operation, returns 0 if no modifcation was done OR modification was
  * successful.
  *
···
  * that this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
  */
-static int opp_set_availability(struct device *dev, unsigned long freq,
-		bool availability_req)
+static int _opp_set_availability(struct device *dev, unsigned long freq,
+				 bool availability_req)
 {
 	struct device_opp *dev_opp;
 	struct dev_pm_opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
···
 	mutex_lock(&dev_opp_list_lock);
 
 	/* Find the device_opp */
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp)) {
 		r = PTR_ERR(dev_opp);
 		dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
···
 
 	list_replace_rcu(&opp->node, &new_opp->node);
 	mutex_unlock(&dev_opp_list_lock);
-	call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, kfree_opp_rcu);
+	call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
 
 	/* Notify the change of the OPP availability */
 	if (availability_req)
···
  * integrity of the internal data structures. Callers should ensure that
  * this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
+ *
+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
+ * copy operation, returns 0 if no modifcation was done OR modification was
+ * successful.
  */
 int dev_pm_opp_enable(struct device *dev, unsigned long freq)
 {
-	return opp_set_availability(dev, freq, true);
+	return _opp_set_availability(dev, freq, true);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
 
···
  * integrity of the internal data structures. Callers should ensure that
  * this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
+ *
+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
+ * copy operation, returns 0 if no modifcation was done OR modification was
+ * successful.
  */
 int dev_pm_opp_disable(struct device *dev, unsigned long freq)
 {
-	return opp_set_availability(dev, freq, false);
+	return _opp_set_availability(dev, freq, false);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
 
 /**
  * dev_pm_opp_get_notifier() - find notifier_head of the device with opp
  * @dev:	device pointer used to lookup device OPPs.
+ *
+ * Return: pointer to  notifier head if found, otherwise -ENODEV or
+ * -EINVAL based on type of error casted as pointer. value must be checked
+ *  with IS_ERR to determine valid pointer or error result.
+ *
+ * Locking: This function must be called under rcu_read_lock(). dev_opp is a RCU
+ * protected pointer. The reason for the same is that the opp pointer which is
+ * returned will remain valid for use with opp_get_{voltage, freq} only while
+ * under the locked area. The pointer returned must be used prior to unlocking
+ * with rcu_read_unlock() to maintain the integrity of the pointer.
  */
 struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
 {
-	struct device_opp *dev_opp = find_device_opp(dev);
+	struct device_opp *dev_opp = _find_device_opp(dev);
 
 	if (IS_ERR(dev_opp))
 		return ERR_CAST(dev_opp); /* matching type */
 
 	return &dev_opp->srcu_head;
 }
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
 
 #ifdef CONFIG_OF
 /**
···
  * @dev:	device pointer used to lookup device OPPs.
  *
  * Register the initial OPP table with the OPP library for given device.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function indirectly uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ *
+ * Return:
+ * 0		On success OR
+ *		Duplicate OPPs (both freq and volt are same) and opp->available
+ * -EEXIST	Freq are same and volt are different OR
+ *		Duplicate OPPs (both freq and volt are same) and !opp->available
+ * -ENOMEM	Memory allocation failure
+ * -ENODEV	when 'operating-points' property is not found or is invalid data
+ *		in device node.
+ * -ENODATA	when empty 'operating-points' property is found
  */
 int of_init_opp_table(struct device *dev)
 {
···
 		unsigned long freq = be32_to_cpup(val++) * 1000;
 		unsigned long volt = be32_to_cpup(val++);
 
-		if (dev_pm_opp_add_dynamic(dev, freq, volt, false))
+		if (_opp_add_dynamic(dev, freq, volt, false))
 			dev_warn(dev, "%s: Failed to add OPP %ld\n",
 				 __func__, freq);
 		nr -= 2;
···
  * @dev:	device pointer used to lookup device OPPs.
  *
  * Free OPPs created using static entries present in DT.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function indirectly uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
  */
 void of_free_opp_table(struct device *dev)
 {
···
 	struct dev_pm_opp *opp, *tmp;
 
 	/* Check for existing list for 'dev' */
-	dev_opp = find_device_opp(dev);
+	dev_opp = _find_device_opp(dev);
 	if (IS_ERR(dev_opp)) {
 		int error = PTR_ERR(dev_opp);
 		if (error != -ENODEV)
···
 	/* Free static OPPs */
 	list_for_each_entry_safe(opp, tmp, &dev_opp->opp_list, node) {
 		if (!opp->dynamic)
-			__dev_pm_opp_remove(dev_opp, opp);
+			_opp_remove(dev_opp, opp);
 	}
 
 	mutex_unlock(&dev_opp_list_lock);

drivers/base/power/qos.c

···
 	struct pm_qos_flags *pqf;
 	s32 val;
 
+	lockdep_assert_held(&dev->power.lock);
+
 	if (IS_ERR_OR_NULL(qos))
 		return PM_QOS_FLAGS_UNDEFINED;
 
···
  */
 s32 __dev_pm_qos_read_value(struct device *dev)
 {
+	lockdep_assert_held(&dev->power.lock);
+
 	return IS_ERR_OR_NULL(dev->power.qos) ?
 		0 : pm_qos_read_value(&dev->power.qos->resume_latency);
 }

drivers/char/hpet.c

···
 	status = acpi_resource_to_address64(res, &addr);
 
 	if (ACPI_SUCCESS(status)) {
-		hdp->hd_phys_address = addr.minimum;
-		hdp->hd_address = ioremap(addr.minimum, addr.address_length);
+		hdp->hd_phys_address = addr.address.minimum;
+		hdp->hd_address = ioremap(addr.address.minimum, addr.address.address_length);
 
 		if (hpet_is_known(hdp)) {
 			iounmap(hdp->hd_address);

drivers/cpufreq/Kconfig.x86

···
 	  By enabling this option the acpi_cpufreq driver provides the old
 	  entry in addition to the new boost ones, for compatibility reasons.
 
+config X86_SFI_CPUFREQ
+	tristate "SFI Performance-States driver"
+	depends on X86_INTEL_MID && SFI
+	help
+	  This adds a CPUFreq driver for some Silvermont based Intel Atom
+	  architectures like Z34xx and Z35xx which enumerate processor
+	  performance states through SFI.
+
+	  If in doubt, say N.
+
 config ELAN_CPUFREQ
 	tristate "AMD Elan SC400 and SC410"
 	depends on MELAN

drivers/cpufreq/Makefile

···
 obj-$(CONFIG_X86_CPUFREQ_NFORCE2)	+= cpufreq-nforce2.o
 obj-$(CONFIG_X86_INTEL_PSTATE)		+= intel_pstate.o
 obj-$(CONFIG_X86_AMD_FREQ_SENSITIVITY)	+= amd_freq_sensitivity.o
+obj-$(CONFIG_X86_SFI_CPUFREQ)		+= sfi-cpufreq.o
 
 ##################################################################################
 # ARM SoC drivers

drivers/cpufreq/cpufreq-dt.c

···
 {
 	struct private_data *priv = policy->driver_data;
 
-	if (priv->cdev)
-		cpufreq_cooling_unregister(priv->cdev);
+	cpufreq_cooling_unregister(priv->cdev);
 	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
 	of_free_opp_table(priv->cpu_dev);
 	clk_put(policy->clk);

drivers/cpufreq/cpufreq.c

···
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/suspend.h>
+#include <linux/syscore_ops.h>
 #include <linux/tick.h>
 #include <trace/events/power.h>
+
+/* Macros to iterate over lists */
+/* Iterate over online CPUs policies */
+static LIST_HEAD(cpufreq_policy_list);
+#define for_each_policy(__policy)				\
+	list_for_each_entry(__policy, &cpufreq_policy_list, policy_list)
+
+/* Iterate over governors */
+static LIST_HEAD(cpufreq_governor_list);
+#define for_each_governor(__governor)				\
+	list_for_each_entry(__governor, &cpufreq_governor_list, governor_list)
 
 /**
  * The "cpufreq driver" - the arch- or hardware-dependent low
···
 static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data_fallback);
 static DEFINE_RWLOCK(cpufreq_driver_lock);
 DEFINE_MUTEX(cpufreq_governor_lock);
-static LIST_HEAD(cpufreq_policy_list);
 
 /* This one keeps track of the previously set governor of a removed CPU */
 static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
···
 /* internal prototypes */
 static int __cpufreq_governor(struct cpufreq_policy *policy,
 		unsigned int event);
-static unsigned int __cpufreq_get(unsigned int cpu);
+static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
 static void handle_update(struct work_struct *work);
 
 /**
···
 {
 	off = 1;
 }
-static LIST_HEAD(cpufreq_governor_list);
 static DEFINE_MUTEX(cpufreq_governor_mutex);
 
 bool have_governor_per_policy(void)
···
 	struct cpufreq_policy *policy = NULL;
 	unsigned long flags;
 
-	if (cpufreq_disabled() || (cpu >= nr_cpu_ids))
+	if (cpu >= nr_cpu_ids)
 		return NULL;
 
 	if (!down_read_trylock(&cpufreq_rwsem))
···
 
 void cpufreq_cpu_put(struct cpufreq_policy *policy)
 {
-	if (cpufreq_disabled())
-		return;
-
 	kobject_put(&policy->kobj);
 	up_read(&cpufreq_rwsem);
 }
···
  * systems as each CPU might be scaled differently. So, use the arch
  * per-CPU loops_per_jiffy value wherever possible.
  */
-#ifndef CONFIG_SMP
-static unsigned long l_p_j_ref;
-static unsigned int l_p_j_ref_freq;
-
 static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
 {
+#ifndef CONFIG_SMP
+	static unsigned long l_p_j_ref;
+	static unsigned int l_p_j_ref_freq;
+
 	if (ci->flags & CPUFREQ_CONST_LOOPS)
 		return;
 
···
 		pr_debug("scaling loops_per_jiffy to %lu for frequency %u kHz\n",
 			 loops_per_jiffy, ci->new);
 	}
-}
-#else
-static inline void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
-{
-	return;
-}
 #endif
+}
 
 static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
 		struct cpufreq_freqs *freqs, unsigned int state)
···
 }
 define_one_global_rw(boost);
 
-static struct cpufreq_governor *__find_governor(const char *str_governor)
+static struct cpufreq_governor *find_governor(const char *str_governor)
 {
 	struct cpufreq_governor *t;
 
-	list_for_each_entry(t, &cpufreq_governor_list, governor_list)
+	for_each_governor(t)
 		if (!strncasecmp(str_governor, t->name, CPUFREQ_NAME_LEN))
 			return t;
 
···
 			*policy = CPUFREQ_POLICY_POWERSAVE;
 			err = 0;
 		}
-	} else if (has_target()) {
+	} else {
 		struct cpufreq_governor *t;
 
 		mutex_lock(&cpufreq_governor_mutex);
 
-		t = __find_governor(str_governor);
+		t = find_governor(str_governor);
 
 		if (t == NULL) {
 			int ret;
···
 			mutex_lock(&cpufreq_governor_mutex);
 
 			if (ret == 0)
-				t = __find_governor(str_governor);
+				t = find_governor(str_governor);
 		}
 
 		if (t != NULL) {
···
 show_one(scaling_min_freq, min);
 show_one(scaling_max_freq, max);
 
-static ssize_t show_scaling_cur_freq(
-	struct cpufreq_policy *policy, char *buf)
+static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf)
 {
 	ssize_t ret;
 
···
 static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy,
 					char *buf)
 {
-	unsigned int cur_freq = __cpufreq_get(policy->cpu);
+	unsigned int cur_freq = __cpufreq_get(policy);
 	if (!cur_freq)
 		return sprintf(buf, "<unknown>");
 	return sprintf(buf, "%u\n", cur_freq);
···
 		goto out;
 	}
 
-	list_for_each_entry(t, &cpufreq_governor_list, governor_list) {
+	for_each_governor(t) {
 		if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char))
 		    - (CPUFREQ_NAME_LEN + 2)))
 			goto out;
···
 
 	/* set up files for this cpu device */
 	drv_attr = cpufreq_driver->attr;
-	while ((drv_attr) && (*drv_attr)) {
+	while (drv_attr && *drv_attr) {
 		ret = sysfs_create_file(&policy->kobj, &((*drv_attr)->attr));
 		if (ret)
 			return ret;
···
 	memcpy(&new_policy, policy, sizeof(*policy));
 
 	/* Update governor of new_policy to the governor used before hotplug */
-	gov = __find_governor(per_cpu(cpufreq_cpu_governor, policy->cpu));
+	gov = find_governor(per_cpu(cpufreq_cpu_governor, policy->cpu));
 	if (gov)
 		pr_debug("Restoring governor %s for cpu %d\n",
 				policy->governor->name, policy->cpu);
···
 	}
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
 static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy,
 				  unsigned int cpu, struct device *dev)
 {
···
 
 	return sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq");
 }
-#endif
 
 static struct cpufreq_policy *cpufreq_policy_restore(unsigned int cpu)
 {
···
 	init_rwsem(&policy->rwsem);
 	spin_lock_init(&policy->transition_lock);
 	init_waitqueue_head(&policy->transition_wait);
+	init_completion(&policy->kobj_unregister);
+	INIT_WORK(&policy->update, handle_update);
 
 	return policy;
 
···
 	}
 
 	down_write(&policy->rwsem);
-
-	policy->last_cpu = policy->cpu;
 	policy->cpu = cpu;
-
 	up_write(&policy->rwsem);
-
-	blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
-			CPUFREQ_UPDATE_POLICY_CPU, policy);
 
 	return 0;
 }
···
 	struct cpufreq_policy *policy;
 	unsigned long flags;
 	bool recover_policy = cpufreq_suspended;
-#ifdef CONFIG_HOTPLUG_CPU
-	struct cpufreq_policy *tpolicy;
-#endif
 
 	if (cpu_is_offline(cpu))
 		return 0;
 
 	pr_debug("adding CPU %u\n", cpu);
 
-#ifdef CONFIG_SMP
 	/* check whether a different CPU already registered this
 	 * CPU because it is in the same boat. */
-	policy = cpufreq_cpu_get(cpu);
-	if (unlikely(policy)) {
-		cpufreq_cpu_put(policy);
+	policy = cpufreq_cpu_get_raw(cpu);
+	if (unlikely(policy))
 		return 0;
-	}
-#endif
 
 	if (!down_read_trylock(&cpufreq_rwsem))
 		return 0;
 
-#ifdef CONFIG_HOTPLUG_CPU
 	/* Check if this cpu was hot-unplugged earlier and has siblings */
 	read_lock_irqsave(&cpufreq_driver_lock, flags);
-	list_for_each_entry(tpolicy, &cpufreq_policy_list, policy_list) {
-		if (cpumask_test_cpu(cpu, tpolicy->related_cpus)) {
+	for_each_policy(policy) {
+		if (cpumask_test_cpu(cpu, policy->related_cpus)) {
 			read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-			ret = cpufreq_add_policy_cpu(tpolicy, cpu, dev);
+			ret = cpufreq_add_policy_cpu(policy, cpu, dev);
 			up_read(&cpufreq_rwsem);
 			return ret;
 		}
 	}
 	read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-#endif
 
 	/*
 	 * Restore the saved policy when doing light-weight init and fall back
···
 		policy->cpu = cpu;
 
 	cpumask_copy(policy->cpus, cpumask_of(cpu));
-
-	init_completion(&policy->kobj_unregister);
-	INIT_WORK(&policy->update, handle_update);
 
 	/* call driver. From then on the cpufreq must be able
 	 * to accept all calls to ->verify and ->setpolicy for this CPU
···
 			pr_err("%s: Failed to stop governor\n", __func__);
 			return ret;
 		}
-	}
 
-	if (!cpufreq_driver->setpolicy)
 		strncpy(per_cpu(cpufreq_cpu_governor, cpu),
 			policy->governor->name, CPUFREQ_NAME_LEN);
+	}
 
 	down_read(&policy->rwsem);
 	cpus = cpumask_weight(policy->cpus);
···
 	unsigned long flags;
 	struct cpufreq_policy *policy;
 
-	read_lock_irqsave(&cpufreq_driver_lock, flags);
+	write_lock_irqsave(&cpufreq_driver_lock, flags);
 	policy = per_cpu(cpufreq_cpu_data, cpu);
-	read_unlock_irqrestore(&cpufreq_driver_lock, flags);
+	per_cpu(cpufreq_cpu_data, cpu) = NULL;
+	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
 	if (!policy) {
 		pr_debug("%s: No cpu_data found\n", __func__);
···
 		}
 	}
 
-	per_cpu(cpufreq_cpu_data, cpu) = NULL;
 	return 0;
 }
 
···
 /**
  *	cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're
  *	in deep trouble.
- *	@cpu: cpu number
- *	@old_freq: CPU frequency the kernel thinks the CPU runs at
+ *	@policy: policy managing CPUs
  *	@new_freq: CPU frequency the CPU actually runs at
  *
  *	We adjust to current frequency first, and need to clean up later.
  *	So either call to cpufreq_update_policy() or schedule handle_update()).
  */
-static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq,
+static void cpufreq_out_of_sync(struct cpufreq_policy *policy,
 				unsigned int new_freq)
 {
-	struct cpufreq_policy *policy;
 	struct cpufreq_freqs freqs;
-	unsigned long flags;
 
 	pr_debug("Warning: CPU frequency out of sync: cpufreq and timing core thinks of %u, is %u kHz\n",
-		 old_freq, new_freq);
+		 policy->cur, new_freq);
 
-	freqs.old = old_freq;
+	freqs.old = policy->cur;
 	freqs.new = new_freq;
-
-	read_lock_irqsave(&cpufreq_driver_lock, flags);
-	policy = per_cpu(cpufreq_cpu_data, cpu);
-	read_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
 	cpufreq_freq_transition_begin(policy, &freqs);
 	cpufreq_freq_transition_end(policy, &freqs, 0);
···
 }
 EXPORT_SYMBOL(cpufreq_quick_get_max);
 
-static unsigned int __cpufreq_get(unsigned int cpu)
+static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
 {
-	struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
 	unsigned int ret_freq = 0;
 
 	if (!cpufreq_driver->get)
 		return ret_freq;
 
-	ret_freq = cpufreq_driver->get(cpu);
+	ret_freq = cpufreq_driver->get(policy->cpu);
 
 	if (ret_freq && policy->cur &&
 		!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
 		/* verify no discrepancy between actual and
 					saved value exists */
 		if (unlikely(ret_freq != policy->cur)) {
-			cpufreq_out_of_sync(cpu, policy->cur, ret_freq);
+			cpufreq_out_of_sync(policy, ret_freq);
 			schedule_work(&policy->update);
 		}
 	}
···
 
 	if (policy) {
 		down_read(&policy->rwsem);
-		ret_freq = __cpufreq_get(cpu);
+		ret_freq = __cpufreq_get(policy);
 		up_read(&policy->rwsem);
 
 		cpufreq_cpu_put(policy);
···
 
 	pr_debug("%s: Suspending Governors\n", __func__);
 
-	list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+	for_each_policy(policy) {
 		if (__cpufreq_governor(policy, CPUFREQ_GOV_STOP))
 			pr_err("%s: Failed to stop governor for policy: %p\n",
 				__func__, policy);
···
 
 	pr_debug("%s: Resuming Governors\n", __func__);
 
-	list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+	for_each_policy(policy) {
 		if (cpufreq_driver->resume && cpufreq_driver->resume(policy))
 			pr_err("%s: Failed to resume driver: %p\n", __func__,
 				policy);
···
 }
 EXPORT_SYMBOL_GPL(cpufreq_driver_target);
 
-/*
- * when "event" is CPUFREQ_GOV_LIMITS
- */
-
 static int __cpufreq_governor(struct cpufreq_policy *policy,
 					unsigned int event)
 {
···
 
 	governor->initialized = 0;
 	err = -EBUSY;
-	if (__find_governor(governor->name) == NULL) {
+	if (!find_governor(governor->name)) {
 		err = 0;
 		list_add(&governor->governor_list, &cpufreq_governor_list);
 	}
···
 			policy->cur = new_policy.cur;
 		} else {
 			if (policy->cur != new_policy.cur && has_target())
-				cpufreq_out_of_sync(cpu, policy->cur,
-								new_policy.cur);
+				cpufreq_out_of_sync(policy, new_policy.cur);
 		}
 	}
 
···
 	struct cpufreq_policy *policy;
 	int ret = -EINVAL;
 
-	list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+	for_each_policy(policy) {
 		freq_table = cpufreq_frequency_get_table(policy->cpu);
 		if (freq_table) {
 			ret = cpufreq_frequency_table_cpuinfo(policy,
···
 
 	pr_debug("trying to register driver %s\n", driver_data->name);
 
-	if (driver_data->setpolicy)
-		driver_data->flags |= CPUFREQ_CONST_LOOPS;
-
 	write_lock_irqsave(&cpufreq_driver_lock, flags);
 	if (cpufreq_driver) {
 		write_unlock_irqrestore(&cpufreq_driver_lock, flags);
···
 	}
 	cpufreq_driver = driver_data;
 	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
+	if (driver_data->setpolicy)
+		driver_data->flags |= CPUFREQ_CONST_LOOPS;
 
 	if (cpufreq_boost_supported()) {
 		/*
···
 	if (ret)
 		goto err_boost_unreg;
 
-	if (!(cpufreq_driver->flags & CPUFREQ_STICKY)) {
-		int i;
-		ret = -ENODEV;
-
-		/* check for at least one working CPU */
-		for (i = 0; i < nr_cpu_ids; i++)
-			if (cpu_possible(i) && per_cpu(cpufreq_cpu_data, i)) {
-				ret = 0;
-				break;
-			}
-
+	if (!(cpufreq_driver->flags & CPUFREQ_STICKY) &&
+	    list_empty(&cpufreq_policy_list)) {
 		/* if all ->init() calls failed, unregister */
-		if (ret) {
-			pr_debug("no CPU initialized for driver %s\n",
-				 driver_data->name);
-			goto err_if_unreg;
-		}
+		pr_debug("%s: No CPU initialized for driver %s\n", __func__,
+			 driver_data->name);
+		goto err_if_unreg;
 	}
 
 	register_hotcpu_notifier(&cpufreq_cpu_notifier);
···
 }
 EXPORT_SYMBOL_GPL(cpufreq_unregister_driver);
 
+/*
+ * Stop cpufreq at shutdown to make sure it isn't holding any locks
+ * or mutexes when secondary CPUs are halted.
+ */
+static struct syscore_ops cpufreq_syscore_ops = {
+	.shutdown = cpufreq_suspend,
+};
+
 static int __init cpufreq_core_init(void)
 {
 	if (cpufreq_disabled())
···
 
 	cpufreq_global_kobject = kobject_create();
 	BUG_ON(!cpufreq_global_kobject);
+
+	register_syscore_ops(&cpufreq_syscore_ops);
 
 	return 0;
 }

drivers/cpufreq/cpufreq_stats.c

···
 static spinlock_t cpufreq_stats_lock;
 
 struct cpufreq_stats {
-	unsigned int cpu;
 	unsigned int total_trans;
 	unsigned long long last_time;
 	unsigned int max_state;
···
 #endif
 };
 
-static DEFINE_PER_CPU(struct cpufreq_stats *, cpufreq_stats_table);
-
-struct cpufreq_stats_attribute {
-	struct attribute attr;
-	ssize_t(*show) (struct cpufreq_stats *, char *);
-};
-
-static int cpufreq_stats_update(unsigned int cpu)
+static int cpufreq_stats_update(struct cpufreq_stats *stats)
 {
-	struct cpufreq_stats *stat;
-	unsigned long long cur_time;
+	unsigned long long cur_time = get_jiffies_64();
 
-	cur_time = get_jiffies_64();
 	spin_lock(&cpufreq_stats_lock);
-	stat = per_cpu(cpufreq_stats_table, cpu);
-	if (stat->time_in_state)
-		stat->time_in_state[stat->last_index] +=
-			cur_time - stat->last_time;
-	stat->last_time = cur_time;
+	stats->time_in_state[stats->last_index] += cur_time - stats->last_time;
+	stats->last_time = cur_time;
 	spin_unlock(&cpufreq_stats_lock);
 	return 0;
 }
 
 static ssize_t show_total_trans(struct cpufreq_policy *policy, char *buf)
 {
-	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-	if (!stat)
-		return 0;
-	return sprintf(buf, "%d\n",
-			per_cpu(cpufreq_stats_table, stat->cpu)->total_trans);
+	return sprintf(buf, "%d\n", policy->stats->total_trans);
 }
 
 static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
 {
+	struct cpufreq_stats *stats = policy->stats;
 	ssize_t len = 0;
 	int i;
-	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-	if (!stat)
-		return 0;
-	cpufreq_stats_update(stat->cpu);
-	for (i = 0; i < stat->state_num; i++) {
-		len += sprintf(buf + len, "%u %llu\n", stat->freq_table[i],
+
+	cpufreq_stats_update(stats);
+	for (i = 0; i < stats->state_num; i++) {
+		len += sprintf(buf + len, "%u %llu\n", stats->freq_table[i],
 			(unsigned long long)
-			jiffies_64_to_clock_t(stat->time_in_state[i]));
+			jiffies_64_to_clock_t(stats->time_in_state[i]));
 	}
 	return len;
 }
···
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
 static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
 {
+	struct cpufreq_stats *stats = policy->stats;
 	ssize_t len = 0;
 	int i, j;
 
-	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-	if (!stat)
-		return 0;
-	cpufreq_stats_update(stat->cpu);
 	len += snprintf(buf + len, PAGE_SIZE - len, "   From  :    To\n");
 	len += snprintf(buf + len, PAGE_SIZE - len, "         : ");
-	for (i = 0; i < stat->state_num; i++) {
+	for (i = 0; i < stats->state_num; i++) {
 		if (len >= PAGE_SIZE)
 			break;
 		len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
-				stat->freq_table[i]);
+				stats->freq_table[i]);
 	}
 	if (len >= PAGE_SIZE)
 		return PAGE_SIZE;
 
 	len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 
-	for (i = 0; i < stat->state_num; i++) {
+	for (i = 0; i < stats->state_num; i++) {
 		if (len >= PAGE_SIZE)
 			break;
 
 		len += snprintf(buf + len, PAGE_SIZE - len, "%9u: ",
-				stat->freq_table[i]);
+				stats->freq_table[i]);
 
-		for (j = 0; j < stat->state_num; j++) {
+		for (j = 0; j < stats->state_num; j++) {
 			if (len >= PAGE_SIZE)
 				break;
 			len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
-					stat->trans_table[i*stat->max_state+j]);
+					stats->trans_table[i*stats->max_state+j]);
 		}
 		if (len >= PAGE_SIZE)
 			break;
···
 	.name = "stats"
 };
 
-static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
+static int freq_table_get_index(struct cpufreq_stats *stats, unsigned int freq)
 {
 	int index;
-	for (index = 0; index < stat->max_state; index++)
-		if (stat->freq_table[index] == freq)
+	for (index = 0; index < stats->max_state; index++)
+		if (stats->freq_table[index] == freq)
 			return index;
 	return -1;
 }
 
 static void __cpufreq_stats_free_table(struct cpufreq_policy *policy)
 {
-	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
+	struct cpufreq_stats *stats = policy->stats;
 
-	if (!stat)
+	/* Already freed */
+	if (!stats)
 		return;
 
-	pr_debug("%s: Free stat table\n", __func__);
+	pr_debug("%s: Free stats table\n", __func__);
 
 	sysfs_remove_group(&policy->kobj, &stats_attr_group);
-	kfree(stat->time_in_state);
-	kfree(stat);
-	per_cpu(cpufreq_stats_table, policy->cpu) = NULL;
+	kfree(stats->time_in_state);
+	kfree(stats);
+	policy->stats = NULL;
 }
 
 static void cpufreq_stats_free_table(unsigned int cpu)
···
 	if (!policy)
 		return;
 
-	if (cpufreq_frequency_get_table(policy->cpu))
-		__cpufreq_stats_free_table(policy);
+	__cpufreq_stats_free_table(policy);
 
 	cpufreq_cpu_put(policy);
 }
 
 static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
 {
-	unsigned int i, count = 0, ret = 0;
-	struct cpufreq_stats *stat;
+	unsigned int i = 0, count = 0, ret = -ENOMEM;
+	struct cpufreq_stats *stats;
 	unsigned int alloc_size;
 	unsigned int cpu = policy->cpu;
 	struct cpufreq_frequency_table *pos, *table;
 
+	/* We need cpufreq table for creating stats table */
 	table = cpufreq_frequency_get_table(cpu);
 	if (unlikely(!table))
 		return 0;
 
-	if (per_cpu(cpufreq_stats_table, cpu))
-		return -EBUSY;
-	stat = kzalloc(sizeof(*stat), GFP_KERNEL);
-	if ((stat) == NULL)
+	/* stats already initialized */
+	if (policy->stats)
+		return -EEXIST;
+
+	stats = kzalloc(sizeof(*stats), GFP_KERNEL);
+	if (!stats)
 		return -ENOMEM;
 
-	ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
-	if (ret)
-		goto error_out;
-
-	stat->cpu = cpu;
-	per_cpu(cpufreq_stats_table, cpu) = stat;
-
+	/* Find total allocation size */
 	cpufreq_for_each_valid_entry(pos, table)
 		count++;
 
···
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
 	alloc_size += count * count * sizeof(int);
 #endif
-	stat->max_state = count;
-	stat->time_in_state = kzalloc(alloc_size, GFP_KERNEL);
-	if (!stat->time_in_state) {
-		ret = -ENOMEM;
-		goto error_alloc;
-	}
-	stat->freq_table = (unsigned int *)(stat->time_in_state + count);
+
+	/* Allocate memory for time_in_state/freq_table/trans_table in one go */
+	stats->time_in_state = kzalloc(alloc_size, GFP_KERNEL);
+	if (!stats->time_in_state)
+		goto free_stat;
+
+	stats->freq_table = (unsigned int *)(stats->time_in_state + count);
 
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
-	stat->trans_table = stat->freq_table + count;
+	stats->trans_table = stats->freq_table + count;
 #endif
-	i = 0;
+
+	stats->max_state = count;
+
+	/* Find valid-unique entries */
 	cpufreq_for_each_valid_entry(pos, table)
-		if (freq_table_get_index(stat, pos->frequency) == -1)
-			stat->freq_table[i++] = pos->frequency;
-	stat->state_num = i;
-	spin_lock(&cpufreq_stats_lock);
-	stat->last_time = get_jiffies_64();
-	stat->last_index = freq_table_get_index(stat, policy->cur);
-	spin_unlock(&cpufreq_stats_lock);
-	return 0;
-error_alloc:
-	sysfs_remove_group(&policy->kobj, &stats_attr_group);
-error_out:
-	kfree(stat);
-	per_cpu(cpufreq_stats_table, cpu) = NULL;
+		if (freq_table_get_index(stats, pos->frequency) == -1)
+			stats->freq_table[i++] = pos->frequency;
+
+	stats->state_num = i;
+	stats->last_time = get_jiffies_64();
+	stats->last_index = freq_table_get_index(stats, policy->cur);
+
+	policy->stats = stats;
+	ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
+	if (!ret)
+		return 0;
+
+	/* We failed, release resources */
+	policy->stats = NULL;
+	kfree(stats->time_in_state);
+free_stat:
+	kfree(stats);
+
 	return ret;
 }
 
···
 	cpufreq_cpu_put(policy);
 }
 
-static void cpufreq_stats_update_policy_cpu(struct cpufreq_policy *policy)
-{
-	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table,
-			policy->last_cpu);
-
-	pr_debug("Updating stats_table for new_cpu %u from last_cpu %u\n",
-			policy->cpu, policy->last_cpu);
-	per_cpu(cpufreq_stats_table, policy->cpu) = per_cpu(cpufreq_stats_table,
-			policy->last_cpu);
-	per_cpu(cpufreq_stats_table, policy->last_cpu) = NULL;
-	stat->cpu = policy->cpu;
-}
-
 static int cpufreq_stat_notifier_policy(struct notifier_block *nb,
 		unsigned long val, void *data)
 {
 	int ret = 0;
 	struct cpufreq_policy *policy = data;
-
-	if (val == CPUFREQ_UPDATE_POLICY_CPU) {
-		cpufreq_stats_update_policy_cpu(policy);
-		return 0;
-	}
 
 	if (val == CPUFREQ_CREATE_POLICY)
 		ret = __cpufreq_stats_create_table(policy);
···
 		unsigned long val, void *data)
 {
 	struct cpufreq_freqs *freq = data;
-	struct cpufreq_stats *stat;
+	struct cpufreq_policy *policy = cpufreq_cpu_get(freq->cpu);
+	struct cpufreq_stats *stats;
 	int old_index, new_index;
 
+	if (!policy) {
+		pr_err("%s: No policy found\n", __func__);
+		return 0;
+	}
+
 	if (val != CPUFREQ_POSTCHANGE)
-		return 0;
+		goto put_policy;
 
-	stat = per_cpu(cpufreq_stats_table, freq->cpu);
-	if (!stat)
-		return 0;
+	if (!policy->stats) {
+		pr_debug("%s: No stats found\n", __func__);
+		goto put_policy;
+	}
 
-	old_index = stat->last_index;
-	new_index = freq_table_get_index(stat, freq->new);
+	stats = policy->stats;
 
-	/* We can't do stat->time_in_state[-1]= .. */
+	old_index = stats->last_index;
+	new_index = freq_table_get_index(stats, freq->new);
+
+	/* We can't do stats->time_in_state[-1]= .. */
 	if (old_index == -1 || new_index == -1)
-		return 0;
-
-	cpufreq_stats_update(freq->cpu);
+		goto put_policy;
 
 	if (old_index == new_index)
-		return 0;
+		goto put_policy;
 
-	spin_lock(&cpufreq_stats_lock);
-	stat->last_index = new_index;
+	cpufreq_stats_update(stats);
+
+	stats->last_index = new_index;
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
-	stat->trans_table[old_index * stat->max_state + new_index]++;
+	stats->trans_table[old_index * stats->max_state + new_index]++;
 #endif
-	stat->total_trans++;
-	spin_unlock(&cpufreq_stats_lock);
+	stats->total_trans++;
+
+put_policy:
+	cpufreq_cpu_put(policy);
 	return 0;
 }
 
···
 }
 
 MODULE_AUTHOR("Zou Nan hai <[e-mail]>");
-MODULE_DESCRIPTION("'cpufreq_stats' - A driver to export cpufreq stats "
-				"through sysfs filesystem");
+MODULE_DESCRIPTION("Export cpufreq stats via sysfs");
 MODULE_LICENSE("GPL");
 
 module_init(cpufreq_stats_init);

drivers/cpufreq/intel_pstate.c

···
 	int32_t min_perf;
 	int max_policy_pct;
 	int max_sysfs_pct;
+	int min_policy_pct;
+	int min_sysfs_pct;
 };
 
 static struct perf_limits limits = {
···
 	.min_perf = 0,
 	.max_policy_pct = 100,
 	.max_sysfs_pct = 100,
+	.min_policy_pct = 0,
+	.min_sysfs_pct = 0,
 };
 
 static inline void pid_reset(struct _pid *pid, int setpoint, int busy,
···
 		return sprintf(buf, "%u\n", limits.object);		\
 	}
 
+static ssize_t show_turbo_pct(struct kobject *kobj,
+				struct attribute *attr, char *buf)
+{
+	struct cpudata *cpu;
+	int total, no_turbo, turbo_pct;
+	uint32_t turbo_fp;
+
+	cpu = all_cpu_data[0];
+
+	total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1;
+	no_turbo = cpu->pstate.max_pstate - cpu->pstate.min_pstate + 1;
+	turbo_fp = div_fp(int_tofp(no_turbo), int_tofp(total));
+	turbo_pct = 100 - fp_toint(mul_fp(turbo_fp, int_tofp(100)));
+	return sprintf(buf, "%u\n", turbo_pct);
+}
+
+static ssize_t show_num_pstates(struct kobject *kobj,
+				struct attribute *attr, char *buf)
+{
+	struct cpudata *cpu;
+	int total;
+
+	cpu = all_cpu_data[0];
+	total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1;
+	return sprintf(buf, "%u\n", total);
+}
+
 static ssize_t show_no_turbo(struct kobject *kobj,
 			     struct attribute *attr, char *buf)
 {
···
 	ret = sscanf(buf, "%u", &input);
 	if (ret != 1)
 		return -EINVAL;
-	limits.min_perf_pct = clamp_t(int, input, 0 , 100);
+
+	limits.min_sysfs_pct = clamp_t(int, input, 0 , 100);
+	limits.min_perf_pct = max(limits.min_policy_pct, limits.min_sysfs_pct);
 	limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
 
 	if (hwp_active)
···
 define_one_global_rw(no_turbo);
 define_one_global_rw(max_perf_pct);
 define_one_global_rw(min_perf_pct);
+define_one_global_ro(turbo_pct);
+define_one_global_ro(num_pstates);
 
 static struct attribute *intel_pstate_attributes[] = {
 	&no_turbo.attr,
 	&max_perf_pct.attr,
 	&min_perf_pct.attr,
+	&turbo_pct.attr,
+	&num_pstates.attr,
 	NULL
 };
 
···
 	ICPU(0x46, core_params),
 	ICPU(0x47, core_params),
 	ICPU(0x4c, byt_params),
+	ICPU(0x4e, core_params),
 	ICPU(0x4f, core_params),
 	ICPU(0x56, core_params),
 	{}
···
 	if (!policy->cpuinfo.max_freq)
 		return -ENODEV;
 
-	if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) {
+	if (policy->policy == CPUFREQ_POLICY_PERFORMANCE &&
+	    policy->max >= policy->cpuinfo.max_freq) {
+		limits.min_policy_pct = 100;
 		limits.min_perf_pct = 100;
 		limits.min_perf = int_tofp(1);
 		limits.max_policy_pct = 100;
···
 		return 0;
 	}
 
-	limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
-	limits.min_perf_pct = clamp_t(int, limits.min_perf_pct, 0 , 100);
+	limits.min_policy_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
+	limits.min_policy_pct = clamp_t(int, limits.min_policy_pct, 0 , 100);
+	limits.min_perf_pct = max(limits.min_policy_pct, limits.min_sysfs_pct);
 	limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
 
 	limits.max_policy_pct = (policy->max * 100) / policy->cpuinfo.max_freq;
···
 
 static int __initdata no_load;
 static int __initdata no_hwp;
+static int __initdata hwp_only;
 static unsigned int force_load;
 
 static int intel_pstate_msrs_not_valid(void)
···
 	if (cpu_has(c,X86_FEATURE_HWP) && !no_hwp)
 		intel_pstate_hwp_enable();
 
+	if (!hwp_active && hwp_only)
+		goto out;
+
 	rc = cpufreq_register_driver(&intel_pstate_driver);
 	if (rc)
 		goto out;
···
 		no_hwp = 1;
 	if (!strcmp(str, "force"))
 		force_load = 1;
+	if (!strcmp(str, "hwp_only"))
+		hwp_only = 1;
 	return 0;
 }
 early_param("intel_pstate", intel_pstate_setup);

drivers/cpufreq/ls1x-cpufreq.c

···
 static struct platform_driver ls1x_cpufreq_platdrv = {
 	.driver = {
 		.name	= "ls1x-cpufreq",
-		.owner	= THIS_MODULE,
 	},
 	.probe		= ls1x_cpufreq_probe,
 	.remove		= ls1x_cpufreq_remove,

drivers/cpufreq/sfi-cpufreq.c

···
+/*
+ *  SFI Performance States Driver
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  Author: Vishwesh M Rudramuni <[e-mail]>
+ *  Author: Srinidhi Kasagar <[e-mail]>
+ */
+
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sfi.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+
+#include <asm/msr.h>
+
+struct cpufreq_frequency_table *freq_table;
+static struct sfi_freq_table_entry *sfi_cpufreq_array;
+static int num_freq_table_entries;
+
+static int sfi_parse_freq(struct sfi_table_header *table)
+{
+	struct sfi_table_simple *sb;
+	struct sfi_freq_table_entry *pentry;
+	int totallen;
+
+	sb = (struct sfi_table_simple *)table;
+	num_freq_table_entries = SFI_GET_NUM_ENTRIES(sb,
+			struct sfi_freq_table_entry);
+	if (num_freq_table_entries <= 1) {
+		pr_err("No p-states discovered\n");
+		return -ENODEV;
+	}
+
+	pentry = (struct sfi_freq_table_entry *)sb->pentry;
+	totallen = num_freq_table_entries * sizeof(*pentry);
+
+	sfi_cpufreq_array = kzalloc(totallen, GFP_KERNEL);
+	if (!sfi_cpufreq_array)
+		return -ENOMEM;
+
+	memcpy(sfi_cpufreq_array, pentry, totallen);
+
+	return 0;
+}
+
+static int sfi_cpufreq_target(struct cpufreq_policy *policy, unsigned int index)
+{
+	unsigned int next_perf_state = 0; /* Index into perf table */
+	u32 lo, hi;
+
+	next_perf_state = policy->freq_table[index].driver_data;
+
+	rdmsr_on_cpu(policy->cpu, MSR_IA32_PERF_CTL, &lo, &hi);
+	lo = (lo & ~INTEL_PERF_CTL_MASK) |
+		((u32) sfi_cpufreq_array[next_perf_state].ctrl_val &
+		INTEL_PERF_CTL_MASK);
+	wrmsr_on_cpu(policy->cpu, MSR_IA32_PERF_CTL, lo, hi);
+
+	return 0;
+}
+
+static int sfi_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+	policy->shared_type = CPUFREQ_SHARED_TYPE_HW;
+	policy->cpuinfo.transition_latency = 100000;	/* 100us */
+
+	return cpufreq_table_validate_and_show(policy, freq_table);
+}
+
+static struct cpufreq_driver sfi_cpufreq_driver = {
+	.flags		= CPUFREQ_CONST_LOOPS,
+	.verify		= cpufreq_generic_frequency_table_verify,
+	.target_index	= sfi_cpufreq_target,
+	.init		= sfi_cpufreq_cpu_init,
+	.name		= "sfi-cpufreq",
+	.attr		= cpufreq_generic_attr,
+};
+
+static int __init sfi_cpufreq_init(void)
+{
+	int ret, i;
+
+	/* parse the freq table from SFI */
+	ret = sfi_table_parse(SFI_SIG_FREQ, NULL, NULL, sfi_parse_freq);
+	if (ret)
+		return ret;
+
+	freq_table = kzalloc(sizeof(*freq_table) *
+			(num_freq_table_entries + 1), GFP_KERNEL);
+	if (!freq_table) {
+		ret = -ENOMEM;
+		goto err_free_array;
+	}
+
+	for (i = 0; i < num_freq_table_entries; i++) {
+		freq_table[i].driver_data = i;
+		freq_table[i].frequency = sfi_cpufreq_array[i].freq_mhz * 1000;
+	}
+	freq_table[i].frequency = CPUFREQ_TABLE_END;
+
+	ret = cpufreq_register_driver(&sfi_cpufreq_driver);
+	if (ret)
+		goto err_free_tbl;
+
+	return ret;
+
+err_free_tbl:
+	kfree(freq_table);
+err_free_array:
+	kfree(sfi_cpufreq_array);
+	return ret;
+}
+late_initcall(sfi_cpufreq_init);
+
+static void __exit sfi_cpufreq_exit(void)
+{
+	cpufreq_unregister_driver(&sfi_cpufreq_driver);
+	kfree(freq_table);
+	kfree(sfi_cpufreq_array);
+}
+module_exit(sfi_cpufreq_exit);
+
+MODULE_AUTHOR("Vishwesh M Rudramuni <[e-mail]>");
+MODULE_DESCRIPTION("SFI Performance-States Driver");
+MODULE_LICENSE("GPL");

drivers/cpuidle/cpuidle-big_little.c

···
 	 */
 	if (!of_match_node(compatible_machine_match, root))
 		return -ENODEV;
+
+	if (!mcpm_is_available())
+		return -EUNATCH;
+
 	/*
 	 * For now the differentiation between little and big cores
 	 * is based on the part number. A7 cores are considered little

drivers/devfreq/Kconfig

···
 	  It reads PPMU counters of memory controllers and adjusts the
 	  operating frequencies and voltages with OPP support.
 
+config ARM_TEGRA_DEVFREQ
+       tristate "Tegra DEVFREQ Driver"
+       depends on ARCH_TEGRA_124_SOC
+       select DEVFREQ_GOV_SIMPLE_ONDEMAND
+       select PM_OPP
+       help
+         This adds the DEVFREQ driver for the Tegra family of SoCs.
+         It reads ACTMON counters of memory controllers and adjusts the
+         operating frequencies and voltages with OPP support.
+
+source "drivers/devfreq/event/Kconfig"
+
 endif # PM_DEVFREQ

drivers/devfreq/Makefile

···
 obj-$(CONFIG_PM_DEVFREQ)	+= devfreq.o
+obj-$(CONFIG_PM_DEVFREQ_EVENT)	+= devfreq-event.o
 obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)	+= governor_simpleondemand.o
 obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE)	+= governor_performance.o
 obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE)	+= governor_powersave.o
···
 # DEVFREQ Drivers
 obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos/
 obj-$(CONFIG_ARM_EXYNOS5_BUS_DEVFREQ)	+= exynos/
+obj-$(CONFIG_ARM_TEGRA_DEVFREQ)		+= tegra-devfreq.o
+
+# DEVFREQ Event Drivers
+obj-$(CONFIG_PM_DEVFREQ_EVENT)		+= event/

drivers/devfreq/devfreq-event.c

···
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Author: Chanwoo Choi <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/devfreq.c.
+ */
+
+#include <linux/devfreq-event.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/of.h>
+
+static struct class *devfreq_event_class;
+
+/* The list of all devfreq event list */
+static LIST_HEAD(devfreq_event_list);
+static DEFINE_MUTEX(devfreq_event_list_lock);
+
+#define to_devfreq_event(DEV) container_of(DEV, struct devfreq_event_dev, dev)
+
+/**
+ * devfreq_event_enable_edev() - Enable the devfreq-event dev and increase
+ *				 the enable_count of devfreq-event dev.
+ * @edev	: the devfreq-event device
+ *
+ * Note that this function increase the enable_count and enable the
+ * devfreq-event device. The devfreq-event device should be enabled before
+ * using it by devfreq device.
+ */
+int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+	int ret = 0;
+
+	if (!edev || !edev->desc)
+		return -EINVAL;
+
+	mutex_lock(&edev->lock);
+	if (edev->desc->ops && edev->desc->ops->enable
+			&& edev->enable_count == 0) {
+		ret = edev->desc->ops->enable(edev);
+		if (ret < 0)
+			goto err;
+	}
+	edev->enable_count++;
+err:
+	mutex_unlock(&edev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_enable_edev);
+
+/**
+ * devfreq_event_disable_edev() - Disable the devfreq-event dev and decrease
+ *				  the enable_count of the devfreq-event dev.
+ * @edev	: the devfreq-event device
+ *
+ * Note that this function decrease the enable_count and disable the
+ * devfreq-event device. After the devfreq-event device is disabled,
+ * devfreq device can't use the devfreq-event device for get/set/reset
+ * operations.
+ */
+int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+	int ret = 0;
+
+	if (!edev || !edev->desc)
+		return -EINVAL;
+
+	mutex_lock(&edev->lock);
+	if (edev->enable_count <= 0) {
+		dev_warn(&edev->dev, "unbalanced enable_count\n");
+		ret = -EIO;
+		goto err;
+	}
+
+	if (edev->desc->ops && edev->desc->ops->disable
+			&& edev->enable_count == 1) {
+		ret = edev->desc->ops->disable(edev);
+		if (ret < 0)
+			goto err;
+	}
+	edev->enable_count--;
+err:
+	mutex_unlock(&edev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_disable_edev);
+
+/**
+ * devfreq_event_is_enabled() - Check whether devfreq-event dev is enabled or
+ *				not.
+ * @edev	: the devfreq-event device
+ *
+ * Note that this function check whether devfreq-event dev is enabled or not.
+ * If return true, the devfreq-event dev is enabeld. If return false, the
+ * devfreq-event dev is disabled.
+ */
+bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+	bool enabled = false;
+
+	if (!edev || !edev->desc)
+		return enabled;
+
+	mutex_lock(&edev->lock);
+
+	if (edev->enable_count > 0)
+		enabled = true;
+
+	mutex_unlock(&edev->lock);
+
+	return enabled;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_is_enabled);
+
+/**
+ * devfreq_event_set_event() - Set event to devfreq-event dev to start.
+ * @edev	: the devfreq-event device
+ *
+ * Note that this function set the event to the devfreq-event device to start
+ * for getting the event data which could be various event type.
+ */
+int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+	int ret;
+
+	if (!edev || !edev->desc)
+		return -EINVAL;
+
+	if (!edev->desc->ops || !edev->desc->ops->set_event)
+		return -EINVAL;
+
+	if (!devfreq_event_is_enabled(edev))
+		return -EPERM;
+
+	mutex_lock(&edev->lock);
+	ret = edev->desc->ops->set_event(edev);
+	mutex_unlock(&edev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_set_event);
+
+/**
+ * devfreq_event_get_event() - Get {load|total}_count from devfreq-event dev.
+ * @edev	: the devfreq-event device
+ * @edata	: the calculated data of devfreq-event device
+ *
+ * Note that this function get the calculated event data from devfreq-event dev
+ * after stoping the progress of whole sequence of devfreq-event dev.
+ */
+int devfreq_event_get_event(struct devfreq_event_dev *edev,
+			    struct devfreq_event_data *edata)
+{
+	int ret;
+
+	if (!edev || !edev->desc)
+		return -EINVAL;
+
+	if (!edev->desc->ops || !edev->desc->ops->get_event)
+		return -EINVAL;
+
+	if (!devfreq_event_is_enabled(edev))
+		return -EINVAL;
+
+	edata->total_count = edata->load_count = 0;
+
+	mutex_lock(&edev->lock);
+	ret = edev->desc->ops->get_event(edev, edata);
+	if (ret < 0)
+		edata->total_count = edata->load_count = 0;
+	mutex_unlock(&edev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_event);
+
+/**
+ * devfreq_event_reset_event() - Reset all opeations of devfreq-event dev.
+ * @edev	: the devfreq-event device
+ *
+ * Note that this function stop all operations of devfreq-event dev and reset
+ * the current event data to make the devfreq-event device into initial state.
+ */
+int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+	int ret = 0;
+
+	if (!edev || !edev->desc)
+		return -EINVAL;
+
+	if (!devfreq_event_is_enabled(edev))
+		return -EPERM;
+
+	mutex_lock(&edev->lock);
+	if (edev->desc->ops && edev->desc->ops->reset)
+		ret = edev->desc->ops->reset(edev);
+	mutex_unlock(&edev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_reset_event);
+
+/**
+ * devfreq_event_get_edev_by_phandle() - Get the devfreq-event dev from
+ *					 devicetree.
+ * @dev		: the pointer to the given device
+ * @index	: the index into list of devfreq-event device
+ *
+ * Note that this function return the pointer of devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(struct device *dev,
+						      int index)
+{
+	struct device_node *node;
+	struct devfreq_event_dev *edev;
+
+	if (!dev->of_node) {
+		dev_err(dev, "device does not have a device node entry\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	node = of_parse_phandle(dev->of_node, "devfreq-events", index);
+	if (!node) {
+		dev_err(dev, "failed to get phandle in %s node\n",
+			dev->of_node->full_name);
+		return ERR_PTR(-ENODEV);
+	}
+
+	mutex_lock(&devfreq_event_list_lock);
+	list_for_each_entry(edev, &devfreq_event_list, node) {
+		if (!strcmp(edev->desc->name, node->name))
+			goto out;
+	}
+	edev = NULL;
+out:
+	mutex_unlock(&devfreq_event_list_lock);
+
+	if (!edev) {
+		dev_err(dev, "unable to get devfreq-event device : %s\n",
+			node->name);
+		of_node_put(node);
+		return ERR_PTR(-ENODEV);
+	}
+
+	of_node_put(node);
+
+	return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_by_phandle);
+
+/**
+ * devfreq_event_get_edev_count() - Get the count of devfreq-event dev
+ * @dev		: the pointer to the given device
+ *
+ * Note that this function return the count of devfreq-event devices.
+ */
+int devfreq_event_get_edev_count(struct device *dev)
+{
+	int count;
+
+	if (!dev->of_node) {
+		dev_err(dev, "device does not have a device node entry\n");
+		return -EINVAL;
+	}
+
+	count = of_property_count_elems_of_size(dev->of_node, "devfreq-events",
+						sizeof(u32));
+	if (count < 0 ) {
+		dev_err(dev,
+			"failed to get the count of devfreq-event in %s node\n",
+			dev->of_node->full_name);
+		return count;
+	}
+
+	return count;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_count);
+
+static void devfreq_event_release_edev(struct device *dev)
+{
+	struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+	kfree(edev);
+}
+
+/**
+ * devfreq_event_add_edev() - Add new devfreq-event device.
+ * @dev		: the device owning the devfreq-event device being created
+ * @desc	: the devfreq-event device's decriptor which include essential
+ *		  data for devfreq-event device.
+ *
+ * Note that this function add new devfreq-event device to devfreq-event class
+ * list and register the device of the devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+						struct devfreq_event_desc *desc)
+{
+	struct devfreq_event_dev *edev;
+	static atomic_t event_no = ATOMIC_INIT(0);
+	int ret;
+
+	if (!dev || !desc)
+		return ERR_PTR(-EINVAL);
+
+	if (!desc->name || !desc->ops)
+		return ERR_PTR(-EINVAL);
+
+	if (!desc->ops->set_event || !desc->ops->get_event)
+		return ERR_PTR(-EINVAL);
+
+	edev = kzalloc(sizeof(struct devfreq_event_dev), GFP_KERNEL);
+	if (!edev)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_init(&edev->lock);
+	edev->desc = desc;
+	edev->enable_count = 0;
+	edev->dev.parent = dev;
+	edev->dev.class = devfreq_event_class;
+	edev->dev.release = devfreq_event_release_edev;
+
+	dev_set_name(&edev->dev, "event.%d", atomic_inc_return(&event_no) - 1);
+	ret = device_register(&edev->dev);
+	if (ret < 0) {
+		put_device(&edev->dev);
+		return ERR_PTR(ret);
+	}
+	dev_set_drvdata(&edev->dev, edev);
+
+	INIT_LIST_HEAD(&edev->node);
+
+	mutex_lock(&devfreq_event_list_lock);
+	list_add(&edev->node, &devfreq_event_list);
+	mutex_unlock(&devfreq_event_list_lock);
+
+	return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_add_edev);
+
+/**
+ * devfreq_event_remove_edev() - Remove the devfreq-event device registered.
+ * @dev		: the devfreq-event device
+ *
+ * Note that this function remove the registered devfreq-event device.
+ */
+int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+	if (!edev)
+		return -EINVAL;
+
+	WARN_ON(edev->enable_count);
+
+	mutex_lock(&devfreq_event_list_lock);
+	list_del(&edev->node);
+	mutex_unlock(&devfreq_event_list_lock);
+
+	device_unregister(&edev->dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_remove_edev);
+
+static int devm_devfreq_event_match(struct device *dev, void *res, void *data)
+{
+	struct devfreq_event_dev **r = res;
+
+	if (WARN_ON(!r || !*r))
+		return 0;
+
+	return *r == data;
+}
+
+static void devm_devfreq_event_release(struct device *dev, void *res)
+{
+	devfreq_event_remove_edev(*(struct devfreq_event_dev **)res);
+}
+
+/**
+ * devm_devfreq_event_add_edev() - Resource-managed devfreq_event_add_edev()
+ * @dev		: the device owning the devfreq-event device being created
+ * @desc	: the devfreq-event device's decriptor which include essential
+ *		  data for devfreq-event device.
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management and simplify the free operation
+ * for memory of devfreq-event device.
+ */
+struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+						struct devfreq_event_desc *desc)
+{
+	struct devfreq_event_dev **ptr, *edev;
+
+	ptr = devres_alloc(devm_devfreq_event_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	edev = devfreq_event_add_edev(dev, desc);
+	if (IS_ERR(edev)) {
+		devres_free(ptr);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	*ptr = edev;
+	devres_add(dev, ptr);
+
+	return edev;
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_add_edev);
+
+/**
+ * devm_devfreq_event_remove_edev()- Resource-managed devfreq_event_remove_edev()
+ * @dev		: the device owning the devfreq-event device being created
+ * @edev	: the devfreq-event device
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management.
+ */
+void devm_devfreq_event_remove_edev(struct device *dev,
+				struct devfreq_event_dev *edev)
+{
+	WARN_ON(devres_release(dev, devm_devfreq_event_release,
+			       devm_devfreq_event_match, edev));
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_remove_edev);
+
+/*
+ * Device attributes for devfreq-event class.
+ */
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+	if (!edev || !edev->desc)
+		return -EINVAL;
+
+	return sprintf(buf, "%s\n", edev->desc->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t enable_count_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+	if (!edev || !edev->desc)
+		return -EINVAL;
+
+	return sprintf(buf, "%d\n", edev->enable_count);
+}
+static DEVICE_ATTR_RO(enable_count);
+
+static struct attribute *devfreq_event_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_enable_count.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(devfreq_event);
+
+static int __init devfreq_event_init(void)
+{
+	devfreq_event_class = class_create(THIS_MODULE, "devfreq-event");
+	if (IS_ERR(devfreq_event_class)) {
+		pr_err("%s: couldn't create class\n", __FILE__);
+		return PTR_ERR(devfreq_event_class);
+	}
+
+	devfreq_event_class->dev_groups = devfreq_event_groups;
+
+	return 0;
+}
+subsys_initcall(devfreq_event_init);
+
+static void __exit devfreq_event_exit(void)
+{
+	class_destroy(devfreq_event_class);
+}
+module_exit(devfreq_event_exit);
+
+MODULE_AUTHOR("Chanwoo Choi <[e-mail]>");
+MODULE_DESCRIPTION("DEVFREQ-Event class support");
+MODULE_LICENSE("GPL");

drivers/devfreq/event/Kconfig

···
+menuconfig PM_DEVFREQ_EVENT
+	bool "DEVFREQ-Event device Support"
+	help
+	  The devfreq-event device provide the raw data and events which
+	  indicate the current state of devfreq-event device. The provided
+	  data from devfreq-event device is used to monitor the state of
+	  device and determine the suitable size of resource to reduce the
+	  wasted resource.
+
+	  The devfreq-event device can support the various type of events
+	  (e.g., raw data, utilization, latency, bandwidth). The events
+	  may be used by devfreq governor and other subsystem.
+
+if PM_DEVFREQ_EVENT
+
+config DEVFREQ_EVENT_EXYNOS_PPMU
+	bool "EXYNOS PPMU (Platform Performance Monitoring Unit) DEVFREQ event Driver"
+	depends on ARCH_EXYNOS
+	select PM_OPP
+	help
+	  This add the devfreq-event driver for Exynos SoC. It provides PPMU
+	  (Platform Performance Monitoring Unit) counters to estimate the
+	  utilization of each module.
+
+endif # PM_DEVFREQ_EVENT

drivers/devfreq/event/Makefile

···
+# Exynos DEVFREQ Event Drivers
+obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o

drivers/devfreq/event/exynos-ppmu.c

···
+/*
+ * exynos_ppmu.c - EXYNOS PPMU (Platform Performance Monitoring Unit) support
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/exynos/exynos_ppmu.c
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/suspend.h>
+#include <linux/devfreq-event.h>
+
+#include "exynos-ppmu.h"
+
+struct exynos_ppmu_data {
+	void __iomem *base;
+	struct clk *clk;
+};
+
+struct exynos_ppmu {
+	struct devfreq_event_dev **edev;
+	struct devfreq_event_desc *desc;
+	unsigned int num_events;
+
+	struct device *dev;
+	struct mutex lock;
+
+	struct exynos_ppmu_data ppmu;
+};
+
+#define PPMU_EVENT(name)			\
+	{ "ppmu-event0-"#name, PPMU_PMNCNT0 },	\
+	{ "ppmu-event1-"#name, PPMU_PMNCNT1 },	\
+	{ "ppmu-event2-"#name, PPMU_PMNCNT2 },	\
+	{ "ppmu-event3-"#name, PPMU_PMNCNT3 }
+
+struct __exynos_ppmu_events {
+	char *name;
+	int id;
+} ppmu_events[] = {
+	/* For Exynos3250, Exynos4 and Exynos5260 */
+	PPMU_EVENT(g3d),
+	PPMU_EVENT(fsys),
+
+	/* For Exynos4 SoCs and Exynos3250 */
+	PPMU_EVENT(dmc0),
+	PPMU_EVENT(dmc1),
+	PPMU_EVENT(cpu),
+	PPMU_EVENT(rightbus),
+	PPMU_EVENT(leftbus),
+	PPMU_EVENT(lcd0),
+	PPMU_EVENT(camif),
+
+	/* Only for Exynos3250 and Exynos5260 */
+	PPMU_EVENT(mfc),
+
+	/* Only for Exynos4 SoCs */
+	PPMU_EVENT(mfc-left),
+	PPMU_EVENT(mfc-right),
+
+	/* Only for Exynos5260 SoCs */
+	PPMU_EVENT(drex0-s0),
+	PPMU_EVENT(drex0-s1),
+	PPMU_EVENT(drex1-s0),
+	PPMU_EVENT(drex1-s1),
+	PPMU_EVENT(eagle),
+	PPMU_EVENT(kfc),
+	PPMU_EVENT(isp),
+	PPMU_EVENT(fimc),
+	PPMU_EVENT(gscl),
+	PPMU_EVENT(mscl),
+	PPMU_EVENT(fimd0x),
+	PPMU_EVENT(fimd1x),
+	{ /* sentinel */ },
+};
+
+static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ppmu_events); i++)
+		if (!strcmp(edev->desc->name, ppmu_events[i].name))
+			return ppmu_events[i].id;
+
+	return -EINVAL;
+}
+
+static int exynos_ppmu_disable(struct devfreq_event_dev *edev)
+{
+	struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+	u32 pmnc;
+
+	/* Disable all counters */
+	__raw_writel(PPMU_CCNT_MASK |
+		     PPMU_PMCNT0_MASK |
+		     PPMU_PMCNT1_MASK |
+		     PPMU_PMCNT2_MASK |
+		     PPMU_PMCNT3_MASK,
+		     info->ppmu.base + PPMU_CNTENC);
+
+	/* Disable PPMU */
+	pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+	pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+	__raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+	return 0;
+}
+
+static int exynos_ppmu_set_event(struct devfreq_event_dev *edev)
+{
+	struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+	int id = exynos_ppmu_find_ppmu_id(edev);
+	u32 pmnc, cntens;
+
+	if (id < 0)
+		return id;
+
+	/* Enable specific counter */
+	cntens = __raw_readl(info->ppmu.base + PPMU_CNTENS);
+	cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+	__raw_writel(cntens, info->ppmu.base + PPMU_CNTENS);
+
+	/* Set the event of Read/Write data count  */
+	__raw_writel(PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT,
+			info->ppmu.base + PPMU_BEVTxSEL(id));
+
+	/* Reset cycle counter/performance counter and enable PPMU */
+	pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+	pmnc &= ~(PPMU_PMNC_ENABLE_MASK
+			| PPMU_PMNC_COUNTER_RESET_MASK
+			| PPMU_PMNC_CC_RESET_MASK);
+	pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT);
+	pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT);
+	pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT);
+	__raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+	return 0;
+}
+
+static int exynos_ppmu_get_event(struct devfreq_event_dev *edev,
+				struct devfreq_event_data *edata)
+{
+	struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+	int id = exynos_ppmu_find_ppmu_id(edev);
+	u32 pmnc, cntenc;
+
+	if (id < 0)
+		return -EINVAL;
+
+	/* Disable PPMU */
+	pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+	pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+	__raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+	/* Read cycle count */
+	edata->total_count = __raw_readl(info->ppmu.base + PPMU_CCNT);
+
+	/* Read performance count */
+	switch (id) {
+	case PPMU_PMNCNT0:
+	case PPMU_PMNCNT1:
+	case PPMU_PMNCNT2:
+		edata->load_count
+			= __raw_readl(info->ppmu.base + PPMU_PMNCT(id));
+		break;
+	case PPMU_PMNCNT3:
+		edata->load_count =
+			((__raw_readl(info->ppmu.base + PPMU_PMCNT3_HIGH) << 8)
+			| __raw_readl(info->ppmu.base + PPMU_PMCNT3_LOW));
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Disable specific counter */
+	cntenc = __raw_readl(info->ppmu.base + PPMU_CNTENC);
+	cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+	__raw_writel(cntenc, info->ppmu.base + PPMU_CNTENC);
+
+	dev_dbg(&edev->dev, "%s (event: %ld/%ld)\n", edev->desc->name,
+					edata->load_count, edata->total_count);
+
+	return 0;
+}
+
+static struct devfreq_event_ops exynos_ppmu_ops = {
+	.disable = exynos_ppmu_disable,
+	.set_event = exynos_ppmu_set_event,
+	.get_event = exynos_ppmu_get_event,
+};
+
+static int of_get_devfreq_events(struct device_node *np,
+				 struct exynos_ppmu *info)
+{
+	struct devfreq_event_desc *desc;
+	struct device *dev = info->dev;
+	struct device_node *events_np, *node;
+	int i, j, count;
+
+	events_np = of_get_child_by_name(np, "events");
+	if (!events_np) {
+		dev_err(dev,
+			"failed to get child node of devfreq-event devices\n");
+		return -EINVAL;
+	}
+
+	count = of_get_child_count(events_np);
+	desc = devm_kzalloc(dev, sizeof(*desc) * count, GFP_KERNEL);
+	if (!desc)
+		return -ENOMEM;
+	info->num_events = count;
+
+	j = 0;
+	for_each_child_of_node(events_np, node) {
+		for (i = 0; i < ARRAY_SIZE(ppmu_events); i++) {
+			if (!ppmu_events[i].name)
+				continue;
+
+			if (!of_node_cmp(node->name, ppmu_events[i].name))
+				break;
+		}
+
+		if (i == ARRAY_SIZE(ppmu_events)) {
+			dev_warn(dev,
+				"don't know how to configure events : %s\n",
+				node->name);
+			continue;
+		}
+
+		desc[j].ops = &exynos_ppmu_ops;
+		desc[j].driver_data = info;
+
+		of_property_read_string(node, "event-name", &desc[j].name);
+
+		j++;
+
+		of_node_put(node);
+	}
+	info->desc = desc;
+
+	of_node_put(events_np);
+
+	return 0;
+}
+
+static int exynos_ppmu_parse_dt(struct exynos_ppmu *info)
+{
+	struct device *dev = info->dev;
+	struct device_node *np = dev->of_node;
+	int ret = 0;
+
+	if (!np) {
+		dev_err(dev, "failed to find devicetree node\n");
+		return -EINVAL;
+	}
+
+	/* Maps the memory mapped IO to control PPMU register */
+	info->ppmu.base = of_iomap(np, 0);
+	if (IS_ERR_OR_NULL(info->ppmu.base)) {
+		dev_err(dev, "failed to map memory region\n");
+		return -ENOMEM;
+	}
+
+	info->ppmu.clk = devm_clk_get(dev, "ppmu");
+	if (IS_ERR(info->ppmu.clk)) {
+		info->ppmu.clk = NULL;
+		dev_warn(dev, "cannot get PPMU clock\n");
+	}
+
+	ret = of_get_devfreq_events(np, info);
+	if (ret < 0) {
+		dev_err(dev, "failed to parse exynos ppmu dt node\n");
+		goto err;
+	}
+
+	return 0;
+
+err:
+	iounmap(info->ppmu.base);
+
+	return ret;
+}
+
+static int exynos_ppmu_probe(struct platform_device *pdev)
+{
+	struct exynos_ppmu *info;
+	struct devfreq_event_dev **edev;
+	struct devfreq_event_desc *desc;
+	int i, ret = 0, size;
+
+	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	mutex_init(&info->lock);
+	info->dev = &pdev->dev;
+
+	/* Parse dt data to get resource */
+	ret = exynos_ppmu_parse_dt(info);
+	if (ret < 0) {
+		dev_err(&pdev->dev,
+			"failed to parse devicetree for resource\n");
+		return ret;
+	}
+	desc = info->desc;
+
+	size = sizeof(struct devfreq_event_dev *) * info->num_events;
+	info->edev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+	if (!info->edev) {
+		dev_err(&pdev->dev,
+			"failed to allocate memory devfreq-event devices\n");
+		return -ENOMEM;
+	}
+	edev = info->edev;
+	platform_set_drvdata(pdev, info);
+
+	for (i = 0; i < info->num_events; i++) {
+		edev[i] = devm_devfreq_event_add_edev(&pdev->dev, &desc[i]);
+		if (IS_ERR(edev)) {
+			ret = PTR_ERR(edev);
+			dev_err(&pdev->dev,
+				"failed to add devfreq-event device\n");
+			goto err;
+		}
+	}
+
+	clk_prepare_enable(info->ppmu.clk);
+
+	return 0;
+err:
+	iounmap(info->ppmu.base);
+
+	return ret;
+}
+
+static int exynos_ppmu_remove(struct platform_device *pdev)
+{
+	struct exynos_ppmu *info = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(info->ppmu.clk);
+	iounmap(info->ppmu.base);
+
+	return 0;
+}
+
+static struct of_device_id exynos_ppmu_id_match[] = {
+	{ .compatible = "samsung,exynos-ppmu", },
+	{ /* sentinel */ },
+};
+
+static struct platform_driver exynos_ppmu_driver = {
+	.probe	= exynos_ppmu_probe,
+	.remove	= exynos_ppmu_remove,
+	.driver = {
+		.name	= "exynos-ppmu",
+		.of_match_table = exynos_ppmu_id_match,
+	},
+};
+module_platform_driver(exynos_ppmu_driver);
+
+MODULE_DESCRIPTION("Exynos PPMU(Platform Performance Monitoring Unit) driver");
+MODULE_AUTHOR("Chanwoo Choi <[e-mail]>");
+MODULE_LICENSE("GPL");

drivers/devfreq/event/exynos-ppmu.h

···
+/*
+ * exynos_ppmu.h - EXYNOS PPMU header file
+ *
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __EXYNOS_PPMU_H__
+#define __EXYNOS_PPMU_H__
+
+enum ppmu_state {
+	PPMU_DISABLE = 0,
+	PPMU_ENABLE,
+};
+
+enum ppmu_counter {
+	PPMU_PMNCNT0 = 0,
+	PPMU_PMNCNT1,
+	PPMU_PMNCNT2,
+	PPMU_PMNCNT3,
+
+	PPMU_PMNCNT_MAX,
+};
+
+enum ppmu_event_type {
+	PPMU_RO_BUSY_CYCLE_CNT	= 0x0,
+	PPMU_WO_BUSY_CYCLE_CNT	= 0x1,
+	PPMU_RW_BUSY_CYCLE_CNT	= 0x2,
+	PPMU_RO_REQUEST_CNT	= 0x3,
+	PPMU_WO_REQUEST_CNT	= 0x4,
+	PPMU_RO_DATA_CNT	= 0x5,
+	PPMU_WO_DATA_CNT	= 0x6,
+	PPMU_RO_LATENCY		= 0x12,
+	PPMU_WO_LATENCY		= 0x16,
+};
+
+enum ppmu_reg {
+	/* PPC control register */
+	PPMU_PMNC		= 0x00,
+	PPMU_CNTENS		= 0x10,
+	PPMU_CNTENC		= 0x20,
+	PPMU_INTENS		= 0x30,
+	PPMU_INTENC		= 0x40,
+	PPMU_FLAG		= 0x50,
+
+	/* Cycle Counter and Performance Event Counter Register */
+	PPMU_CCNT		= 0x100,
+	PPMU_PMCNT0		= 0x110,
+	PPMU_PMCNT1		= 0x120,
+	PPMU_PMCNT2		= 0x130,
+	PPMU_PMCNT3_HIGH	= 0x140,
+	PPMU_PMCNT3_LOW		= 0x150,
+
+	/* Bus Event Generator */
+	PPMU_BEVT0SEL		= 0x1000,
+	PPMU_BEVT1SEL		= 0x1100,
+	PPMU_BEVT2SEL		= 0x1200,
+	PPMU_BEVT3SEL		= 0x1300,
+	PPMU_COUNTER_RESET	= 0x1810,
+	PPMU_READ_OVERFLOW_CNT	= 0x1810,
+	PPMU_READ_UNDERFLOW_CNT	= 0x1814,
+	PPMU_WRITE_OVERFLOW_CNT	= 0x1850,
+	PPMU_WRITE_UNDERFLOW_CNT = 0x1854,
+	PPMU_READ_PENDING_CNT	= 0x1880,
+	PPMU_WRITE_PENDING_CNT	= 0x1884
+};
+
+/* PMNC register */
+#define PPMU_PMNC_CC_RESET_SHIFT	2
+#define PPMU_PMNC_COUNTER_RESET_SHIFT	1
+#define PPMU_PMNC_ENABLE_SHIFT		0
+#define PPMU_PMNC_START_MODE_MASK	BIT(16)
+#define PPMU_PMNC_CC_DIVIDER_MASK	BIT(3)
+#define PPMU_PMNC_CC_RESET_MASK		BIT(2)
+#define PPMU_PMNC_COUNTER_RESET_MASK	BIT(1)
+#define PPMU_PMNC_ENABLE_MASK		BIT(0)
+
+/* CNTENS/CNTENC/INTENS/INTENC/FLAG register */
+#define PPMU_CCNT_MASK			BIT(31)
+#define PPMU_PMCNT3_MASK		BIT(3)
+#define PPMU_PMCNT2_MASK		BIT(2)
+#define PPMU_PMCNT1_MASK		BIT(1)
+#define PPMU_PMCNT0_MASK		BIT(0)
+
+/* PPMU_PMNCTx/PPMU_BETxSEL registers */
+#define PPMU_PMNCT(x)			(PPMU_PMCNT0 + (0x10 * x))
+#define PPMU_BEVTxSEL(x)		(PPMU_BEVT0SEL + (0x100 * x))
+
+#endif /* __EXYNOS_PPMU_H__ */

drivers/devfreq/tegra-devfreq.c

···
+/*
+ * A devfreq driver for NVIDIA Tegra SoCs
+ *
+ * Copyright (c) 2014 NVIDIA CORPORATION. All rights reserved.
+ * Copyright (C) 2014 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/devfreq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_opp.h>
+#include <linux/reset.h>
+
+#include "governor.h"
+
+#define ACTMON_GLB_STATUS					0x0
+#define ACTMON_GLB_PERIOD_CTRL					0x4
+
+#define ACTMON_DEV_CTRL						0x0
+#define ACTMON_DEV_CTRL_K_VAL_SHIFT				10
+#define ACTMON_DEV_CTRL_ENB_PERIODIC				BIT(18)
+#define ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN			BIT(20)
+#define ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN			BIT(21)
+#define ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_NUM_SHIFT	23
+#define ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT	26
+#define ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN		BIT(29)
+#define ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN		BIT(30)
+#define ACTMON_DEV_CTRL_ENB					BIT(31)
+
+#define ACTMON_DEV_UPPER_WMARK					0x4
+#define ACTMON_DEV_LOWER_WMARK					0x8
+#define ACTMON_DEV_INIT_AVG					0xc
+#define ACTMON_DEV_AVG_UPPER_WMARK				0x10
+#define ACTMON_DEV_AVG_LOWER_WMARK				0x14
+#define ACTMON_DEV_COUNT_WEIGHT					0x18
+#define ACTMON_DEV_AVG_COUNT					0x20
+#define ACTMON_DEV_INTR_STATUS					0x24
+
+#define ACTMON_INTR_STATUS_CLEAR				0xffffffff
+
+#define ACTMON_DEV_INTR_CONSECUTIVE_UPPER			BIT(31)
+#define ACTMON_DEV_INTR_CONSECUTIVE_LOWER			BIT(30)
+
+#define ACTMON_ABOVE_WMARK_WINDOW				1
+#define ACTMON_BELOW_WMARK_WINDOW				3
+#define ACTMON_BOOST_FREQ_STEP					16000
+
+/* activity counter is incremented every 256 memory transactions, and each
+ * transaction takes 4 EMC clocks for Tegra124; So the COUNT_WEIGHT is
+ * 4 * 256 = 1024.
+ */
+#define ACTMON_COUNT_WEIGHT					0x400
+
+/*
+ * ACTMON_AVERAGE_WINDOW_LOG2: default value for @DEV_CTRL_K_VAL, which
+ * translates to 2 ^ (K_VAL + 1). ex: 2 ^ (6 + 1) = 128
+ */
+#define ACTMON_AVERAGE_WINDOW_LOG2			6
+#define ACTMON_SAMPLING_PERIOD				12 /* ms */
+#define ACTMON_DEFAULT_AVG_BAND				6  /* 1/10 of % */
+
+#define KHZ							1000
+
+/* Assume that the bus is saturated if the utilization is 25% */
+#define BUS_SATURATION_RATIO					25
+
+/**
+ * struct tegra_devfreq_device_config - configuration specific to an ACTMON
+ * device
+ *
+ * Coefficients and thresholds are in %
+ */
+struct tegra_devfreq_device_config {
+	u32		offset;
+	u32		irq_mask;
+
+	unsigned int	boost_up_coeff;
+	unsigned int	boost_down_coeff;
+	unsigned int	boost_up_threshold;
+	unsigned int	boost_down_threshold;
+	u32		avg_dependency_threshold;
+};
+
+enum tegra_actmon_device {
+	MCALL = 0,
+	MCCPU,
+};
+
+static struct tegra_devfreq_device_config actmon_device_configs[] = {
+	{
+		/* MCALL */
+		.offset = 0x1c0,
+		.irq_mask = 1 << 26,
+		.boost_up_coeff = 200,
+		.boost_down_coeff = 50,
+		.boost_up_threshold = 60,
+		.boost_down_threshold = 40,
+	},
+	{
+		/* MCCPU */
+		.offset = 0x200,
+		.irq_mask = 1 << 25,
+		.boost_up_coeff = 800,
+		.boost_down_coeff = 90,
+		.boost_up_threshold = 27,
+		.boost_down_threshold = 10,
+		.avg_dependency_threshold = 50000,
+	},
+};
+
+/**
+ * struct tegra_devfreq_device - state specific to an ACTMON device
+ *
+ * Frequencies are in kHz.
+ */
+struct tegra_devfreq_device {
+	const struct tegra_devfreq_device_config *config;
+
+	void __iomem	*regs;
+	u32		avg_band_freq;
+	u32		avg_count;
+
+	unsigned long	target_freq;
+	unsigned long	boost_freq;
+};
+
+struct tegra_devfreq {
+	struct devfreq		*devfreq;
+
+	struct platform_device	*pdev;
+	struct reset_control	*reset;
+	struct clk		*clock;
+	void __iomem		*regs;
+
+	spinlock_t		lock;
+
+	struct clk		*emc_clock;
+	unsigned long		max_freq;
+	unsigned long		cur_freq;
+	struct notifier_block	rate_change_nb;
+
+	struct tegra_devfreq_device devices[ARRAY_SIZE(actmon_device_configs)];
+};
+
+struct tegra_actmon_emc_ratio {
+	unsigned long cpu_freq;
+	unsigned long emc_freq;
+};
+
+static struct tegra_actmon_emc_ratio actmon_emc_ratios[] = {
+	{ 1400000, ULONG_MAX },
+	{ 1200000,    750000 },
+	{ 1100000,    600000 },
+	{ 1000000,    500000 },
+	{  800000,    375000 },
+	{  500000,    200000 },
+	{  250000,    100000 },
+};
+
+static unsigned long do_percent(unsigned long val, unsigned int pct)
+{
+	return val * pct / 100;
+}
+
+static void tegra_devfreq_update_avg_wmark(struct tegra_devfreq_device *dev)
+{
+	u32 avg = dev->avg_count;
+	u32 band = dev->avg_band_freq * ACTMON_SAMPLING_PERIOD;
+
+	writel(avg + band, dev->regs + ACTMON_DEV_AVG_UPPER_WMARK);
+	avg = max(avg, band);
+	writel(avg - band, dev->regs + ACTMON_DEV_AVG_LOWER_WMARK);
+}
+
+static void tegra_devfreq_update_wmark(struct tegra_devfreq *tegra,
+				       struct tegra_devfreq_device *dev)
+{
+	u32 val = tegra->cur_freq * ACTMON_SAMPLING_PERIOD;
+
+	writel(do_percent(val, dev->config->boost_up_threshold),
+	       dev->regs + ACTMON_DEV_UPPER_WMARK);
+
+	writel(do_percent(val, dev->config->boost_down_threshold),
+	       dev->regs + ACTMON_DEV_LOWER_WMARK);
+}
+
+static void actmon_write_barrier(struct tegra_devfreq *tegra)
+{
+	/* ensure the update has reached the ACTMON */
+	wmb();
+	readl(tegra->regs + ACTMON_GLB_STATUS);
+}
+
+static irqreturn_t actmon_isr(int irq, void *data)
+{
+	struct tegra_devfreq *tegra = data;
+	struct tegra_devfreq_device *dev = NULL;
+	unsigned long flags;
+	u32 val;
+	unsigned int i;
+
+	val = readl(tegra->regs + ACTMON_GLB_STATUS);
+
+	for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+		if (val & tegra->devices[i].config->irq_mask) {
+			dev = tegra->devices + i;
+			break;
+		}
+	}
+
+	if (!dev)
+		return IRQ_NONE;
+
+	spin_lock_irqsave(&tegra->lock, flags);
+
+	dev->avg_count = readl(dev->regs + ACTMON_DEV_AVG_COUNT);
+	tegra_devfreq_update_avg_wmark(dev);
+
+	val = readl(dev->regs + ACTMON_DEV_INTR_STATUS);
+	if (val & ACTMON_DEV_INTR_CONSECUTIVE_UPPER) {
+		val = readl(dev->regs + ACTMON_DEV_CTRL) |
+			ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN |
+			ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+
+		/*
+		 * new_boost = min(old_boost * up_coef + step, max_freq)
+		 */
+		dev->boost_freq = do_percent(dev->boost_freq,
+					     dev->config->boost_up_coeff);
+		dev->boost_freq += ACTMON_BOOST_FREQ_STEP;
+		if (dev->boost_freq >= tegra->max_freq) {
+			dev->boost_freq = tegra->max_freq;
+			val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
+		}
+		writel(val, dev->regs + ACTMON_DEV_CTRL);
+	} else if (val & ACTMON_DEV_INTR_CONSECUTIVE_LOWER) {
+		val = readl(dev->regs + ACTMON_DEV_CTRL) |
+			ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN |
+			ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+
+		/*
+		 * new_boost = old_boost * down_coef
+		 * or 0 if (old_boost * down_coef < step / 2)
+		 */
+		dev->boost_freq = do_percent(dev->boost_freq,
+					     dev->config->boost_down_coeff);
+		if (dev->boost_freq < (ACTMON_BOOST_FREQ_STEP >> 1)) {
+			dev->boost_freq = 0;
+			val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+		}
+		writel(val, dev->regs + ACTMON_DEV_CTRL);
+	}
+
+	if (dev->config->avg_dependency_threshold) {
+		val = readl(dev->regs + ACTMON_DEV_CTRL);
+		if (dev->avg_count >= dev->config->avg_dependency_threshold)
+			val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+		else if (dev->boost_freq == 0)
+			val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+		writel(val, dev->regs + ACTMON_DEV_CTRL);
+	}
+
+	writel(ACTMON_INTR_STATUS_CLEAR, dev->regs + ACTMON_DEV_INTR_STATUS);
+
+	actmon_write_barrier(tegra);
+
+	spin_unlock_irqrestore(&tegra->lock, flags);
+
+	return IRQ_WAKE_THREAD;
+}
+
+static unsigned long actmon_cpu_to_emc_rate(struct tegra_devfreq *tegra,
+					    unsigned long cpu_freq)
+{
+	unsigned int i;
+	struct tegra_actmon_emc_ratio *ratio = actmon_emc_ratios;
+
+	for (i = 0; i < ARRAY_SIZE(actmon_emc_ratios); i++, ratio++) {
+		if (cpu_freq >= ratio->cpu_freq) {
+			if (ratio->emc_freq >= tegra->max_freq)
+				return tegra->max_freq;
+			else
+				return ratio->emc_freq;
+		}
+	}
+
+	return 0;
+}
+
+static void actmon_update_target(struct tegra_devfreq *tegra,
+				 struct tegra_devfreq_device *dev)
+{
+	unsigned long cpu_freq = 0;
+	unsigned long static_cpu_emc_freq = 0;
+	unsigned int avg_sustain_coef;
+	unsigned long flags;
+
+	if (dev->config->avg_dependency_threshold) {
+		cpu_freq = cpufreq_get(0);
+		static_cpu_emc_freq = actmon_cpu_to_emc_rate(tegra, cpu_freq);
+	}
+
+	spin_lock_irqsave(&tegra->lock, flags);
+
+	dev->target_freq = dev->avg_count / ACTMON_SAMPLING_PERIOD;
+	avg_sustain_coef = 100 * 100 / dev->config->boost_up_threshold;
+	dev->target_freq = do_percent(dev->target_freq, avg_sustain_coef);
+	dev->target_freq += dev->boost_freq;
+
+	if (dev->avg_count >= dev->config->avg_dependency_threshold)
+		dev->target_freq = max(dev->target_freq, static_cpu_emc_freq);
+
+	spin_unlock_irqrestore(&tegra->lock, flags);
+}
+
+static irqreturn_t actmon_thread_isr(int irq, void *data)
+{
+	struct tegra_devfreq *tegra = data;
+
+	mutex_lock(&tegra->devfreq->lock);
+	update_devfreq(tegra->devfreq);
+	mutex_unlock(&tegra->devfreq->lock);
+
+	return IRQ_HANDLED;
+}
+
+static int tegra_actmon_rate_notify_cb(struct notifier_block *nb,
+				       unsigned long action, void *ptr)
+{
+	struct clk_notifier_data *data = ptr;
+	struct tegra_devfreq *tegra = container_of(nb, struct tegra_devfreq,
+						   rate_change_nb);
+	unsigned int i;
+	unsigned long flags;
+
+	spin_lock_irqsave(&tegra->lock, flags);
+
+	switch (action) {
+	case POST_RATE_CHANGE:
+		tegra->cur_freq = data->new_rate / KHZ;
+
+		for (i = 0; i < ARRAY_SIZE(tegra->devices); i++)
+			tegra_devfreq_update_wmark(tegra, tegra->devices + i);
+
+		actmon_write_barrier(tegra);
+		break;
+	case PRE_RATE_CHANGE:
+		/* fall through */
+	case ABORT_RATE_CHANGE:
+		break;
+	};
+
+	spin_unlock_irqrestore(&tegra->lock, flags);
+
+	return NOTIFY_OK;
+}
+
+static void tegra_actmon_configure_device(struct tegra_devfreq *tegra,
+					  struct tegra_devfreq_device *dev)
+{
+	u32 val;
+
+	dev->avg_band_freq = tegra->max_freq * ACTMON_DEFAULT_AVG_BAND / KHZ;
+	dev->target_freq = tegra->cur_freq;
+
+	dev->avg_count = tegra->cur_freq * ACTMON_SAMPLING_PERIOD;
+	writel(dev->avg_count, dev->regs + ACTMON_DEV_INIT_AVG);
+
+	tegra_devfreq_update_avg_wmark(dev);
+	tegra_devfreq_update_wmark(tegra, dev);
+
+	writel(ACTMON_COUNT_WEIGHT, dev->regs + ACTMON_DEV_COUNT_WEIGHT);
+	writel(ACTMON_INTR_STATUS_CLEAR, dev->regs + ACTMON_DEV_INTR_STATUS);
+
+	val = 0;
+	val |= ACTMON_DEV_CTRL_ENB_PERIODIC |
+	       ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN |
+	       ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN;
+	val |= (ACTMON_AVERAGE_WINDOW_LOG2 - 1)
+		<< ACTMON_DEV_CTRL_K_VAL_SHIFT;
+	val |= (ACTMON_BELOW_WMARK_WINDOW - 1)
+		<< ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_NUM_SHIFT;
+	val |= (ACTMON_ABOVE_WMARK_WINDOW - 1)
+		<< ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT;
+	val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN |
+	       ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
+
+	writel(val, dev->regs + ACTMON_DEV_CTRL);
+
+	actmon_write_barrier(tegra);
+
+	val = readl(dev->regs + ACTMON_DEV_CTRL);
+	val |= ACTMON_DEV_CTRL_ENB;
+	writel(val, dev->regs + ACTMON_DEV_CTRL);
+
+	actmon_write_barrier(tegra);
+}
+
+static int tegra_devfreq_suspend(struct device *dev)
+{
+	struct platform_device *pdev;
+	struct tegra_devfreq *tegra;
+	struct tegra_devfreq_device *actmon_dev;
+	unsigned int i;
+	u32 val;
+
+	pdev = container_of(dev, struct platform_device, dev);
+	tegra = platform_get_drvdata(pdev);
+
+	for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+		actmon_dev = &tegra->devices[i];
+
+		val = readl(actmon_dev->regs + ACTMON_DEV_CTRL);
+		val &= ~ACTMON_DEV_CTRL_ENB;
+		writel(val, actmon_dev->regs + ACTMON_DEV_CTRL);
+
+		writel(ACTMON_INTR_STATUS_CLEAR,
+		       actmon_dev->regs + ACTMON_DEV_INTR_STATUS);
+
+		actmon_write_barrier(tegra);
+	}
+
+	return 0;
+}
+
+static int tegra_devfreq_resume(struct device *dev)
+{
+	struct platform_device *pdev;
+	struct tegra_devfreq *tegra;
+	struct tegra_devfreq_device *actmon_dev;
+	unsigned int i;
+
+	pdev = container_of(dev, struct platform_device, dev);
+	tegra = platform_get_drvdata(pdev);
+
+	for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+		actmon_dev = &tegra->devices[i];
+
+		tegra_actmon_configure_device(tegra, actmon_dev);
+	}
+
+	return 0;
+}
+
+static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
+				u32 flags)
+{
+	struct platform_device *pdev;
+	struct tegra_devfreq *tegra;
+	struct dev_pm_opp *opp;
+	unsigned long rate = *freq * KHZ;
+
+	pdev = container_of(dev, struct platform_device, dev);
+	tegra = platform_get_drvdata(pdev);
+
+	rcu_read_lock();
+	opp = devfreq_recommended_opp(dev, &rate, flags);
+	if (IS_ERR(opp)) {
+		rcu_read_unlock();
+		dev_err(dev, "Failed to find opp for %lu KHz\n", *freq);
+		return PTR_ERR(opp);
+	}
+	rate = dev_pm_opp_get_freq(opp);
+	rcu_read_unlock();
+
+	/* TODO: Once we have per-user clk constraints, set a floor */
+	clk_set_rate(tegra->emc_clock, rate);
+
+	/* TODO: Set voltage as well */
+
+	return 0;
+}
+
+static int tegra_devfreq_get_dev_status(struct device *dev,
+					struct devfreq_dev_status *stat)
+{
+	struct platform_device *pdev;
+	struct tegra_devfreq *tegra;
+	struct tegra_devfreq_device *actmon_dev;
+
+	pdev = container_of(dev, struct platform_device, dev);
+	tegra = platform_get_drvdata(pdev);
+
+	stat->current_frequency = tegra->cur_freq;
+
+	/* To be used by the tegra governor */
+	stat->private_data = tegra;
+
+	/* The below are to be used by the other governors */
+
+	actmon_dev = &tegra->devices[MCALL];
+
+	/* Number of cycles spent on memory access */
+	stat->busy_time = actmon_dev->avg_count;
+
+	/* The bus can be considered to be saturated way before 100% */
+	stat->busy_time *= 100 / BUS_SATURATION_RATIO;
+
+	/* Number of cycles in a sampling period */
+	stat->total_time = ACTMON_SAMPLING_PERIOD * tegra->cur_freq;
+
+	return 0;
+}
+
+static int tegra_devfreq_get_target(struct devfreq *devfreq,
+				    unsigned long *freq)
+{
+	struct devfreq_dev_status stat;
+	struct tegra_devfreq *tegra;
+	struct tegra_devfreq_device *dev;
+	unsigned long target_freq = 0;
+	unsigned int i;
+	int err;
+
+	err = devfreq->profile->get_dev_status(devfreq->dev.parent, &stat);
+	if (err)
+		return err;
+
+	tegra = stat.private_data;
+
+	for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+		dev = &tegra->devices[i];
+
+		actmon_update_target(tegra, dev);
+
+		target_freq = max(target_freq, dev->target_freq);
+	}
+
+	*freq = target_freq;
+
+	return 0;
+}
+
+static int tegra_devfreq_event_handler(struct devfreq *devfreq,
+				       unsigned int event, void *data)
+{
+	return 0;
+}
+
+static struct devfreq_governor tegra_devfreq_governor = {
+	.name = "tegra",
+	.get_target_freq = tegra_devfreq_get_target,
+	.event_handler = tegra_devfreq_event_handler,
+};
+
+static struct devfreq_dev_profile tegra_devfreq_profile = {
+	.polling_ms	= 0,
+	.target		= tegra_devfreq_target,
+	.get_dev_status	= tegra_devfreq_get_dev_status,
+};
+
+static int tegra_devfreq_probe(struct platform_device *pdev)
+{
+	struct tegra_devfreq *tegra;
+	struct tegra_devfreq_device *dev;
+	struct resource *res;
+	unsigned long max_freq;
+	unsigned int i;
+	int irq;
+	int err;
+
+	tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
+	if (!tegra)
+		return -ENOMEM;
+
+	spin_lock_init(&tegra->lock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "Failed to get regs resource\n");
+		return -ENODEV;
+	}
+
+	tegra->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(tegra->regs)) {
+		dev_err(&pdev->dev, "Failed to get IO memory\n");
+		return PTR_ERR(tegra->regs);
+	}
+
+	tegra->reset = devm_reset_control_get(&pdev->dev, "actmon");
+	if (IS_ERR(tegra->reset)) {
+		dev_err(&pdev->dev, "Failed to get reset\n");
+		return PTR_ERR(tegra->reset);
+	}
+
+	tegra->clock = devm_clk_get(&pdev->dev, "actmon");
+	if (IS_ERR(tegra->clock)) {
+		dev_err(&pdev->dev, "Failed to get actmon clock\n");
+		return PTR_ERR(tegra->clock);
+	}
+
+	tegra->emc_clock = devm_clk_get(&pdev->dev, "emc");
+	if (IS_ERR(tegra->emc_clock)) {
+		dev_err(&pdev->dev, "Failed to get emc clock\n");
+		return PTR_ERR(tegra->emc_clock);
+	}
+
+	err = of_init_opp_table(&pdev->dev);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to init operating point table\n");
+		return err;
+	}
+
+	tegra->rate_change_nb.notifier_call = tegra_actmon_rate_notify_cb;
+	err = clk_notifier_register(tegra->emc_clock, &tegra->rate_change_nb);
+	if (err) {
+		dev_err(&pdev->dev,
+			"Failed to register rate change notifier\n");
+		return err;
+	}
+
+	reset_control_assert(tegra->reset);
+
+	err = clk_prepare_enable(tegra->clock);
+	if (err) {
+		reset_control_deassert(tegra->reset);
+		return err;
+	}
+
+	reset_control_deassert(tegra->reset);
+
+	max_freq = clk_round_rate(tegra->emc_clock, ULONG_MAX);
+	tegra->max_freq = max_freq / KHZ;
+
+	clk_set_rate(tegra->emc_clock, max_freq);
+
+	tegra->cur_freq = clk_get_rate(tegra->emc_clock) / KHZ;
+
+	writel(ACTMON_SAMPLING_PERIOD - 1,
+	       tegra->regs + ACTMON_GLB_PERIOD_CTRL);
+
+	for (i = 0; i < ARRAY_SIZE(actmon_device_configs); i++) {
+		dev = tegra->devices + i;
+		dev->config = actmon_device_configs + i;
+		dev->regs = tegra->regs + dev->config->offset;
+
+		tegra_actmon_configure_device(tegra, tegra->devices + i);
+	}
+
+	err = devfreq_add_governor(&tegra_devfreq_governor);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to add governor\n");
+		return err;
+	}
+
+	tegra_devfreq_profile.initial_freq = clk_get_rate(tegra->emc_clock);
+	tegra->devfreq = devm_devfreq_add_device(&pdev->dev,
+						 &tegra_devfreq_profile,
+						 "tegra",
+						 NULL);
+
+	irq = platform_get_irq(pdev, 0);
+	err = devm_request_threaded_irq(&pdev->dev, irq, actmon_isr,
+					actmon_thread_isr, IRQF_SHARED,
+					"tegra-devfreq", tegra);
+	if (err) {
+		dev_err(&pdev->dev, "Interrupt request failed\n");
+		return err;
+	}
+
+	platform_set_drvdata(pdev, tegra);
+
+	return 0;
+}
+
+static int tegra_devfreq_remove(struct platform_device *pdev)
+{
+	struct tegra_devfreq *tegra = platform_get_drvdata(pdev);
+
+	clk_notifier_unregister(tegra->emc_clock, &tegra->rate_change_nb);
+
+	clk_disable_unprepare(tegra->clock);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(tegra_devfreq_pm_ops,
+			 tegra_devfreq_suspend,
+			 tegra_devfreq_resume);
+
+static struct of_device_id tegra_devfreq_of_match[] = {
+	{ .compatible = "nvidia,tegra124-actmon" },
+	{ },
+};
+
+static struct platform_driver tegra_devfreq_driver = {
+	.probe	= tegra_devfreq_probe,
+	.remove	= tegra_devfreq_remove,
+	.driver = {
+		.name		= "tegra-devfreq",
+		.owner		= THIS_MODULE,
+		.of_match_table = tegra_devfreq_of_match,
+		.pm		= &tegra_devfreq_pm_ops,
+	},
+};
+module_platform_driver(tegra_devfreq_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Tegra devfreq driver");
+MODULE_AUTHOR("Tomeu Vizoso <[e-mail]>");
+MODULE_DEVICE_TABLE(of, tegra_devfreq_of_match);

drivers/dma/acpi-dma.c

···
 {
 	const struct acpi_csrt_shared_info *si;
 	struct list_head resource_list;
-	struct resource_list_entry *rentry;
+	struct resource_entry *rentry;
 	resource_size_t mem = 0, irq = 0;
 	int ret;
 
···
 		return 0;
 
 	list_for_each_entry(rentry, &resource_list, node) {
-		if (resource_type(&rentry->res) == IORESOURCE_MEM)
-			mem = rentry->res.start;
-		else if (resource_type(&rentry->res) == IORESOURCE_IRQ)
-			irq = rentry->res.start;
+		if (resource_type(rentry->res) == IORESOURCE_MEM)
+			mem = rentry->res->start;
+		else if (resource_type(rentry->res) == IORESOURCE_IRQ)
+			irq = rentry->res->start;
 	}
 
 	acpi_dev_free_resource_list(&resource_list);

drivers/hv/vmbus_drv.c

···
 		break;
 
 	case ACPI_RESOURCE_TYPE_ADDRESS64:
-		hyperv_mmio.start = res->data.address64.minimum;
-		hyperv_mmio.end = res->data.address64.maximum;
+		hyperv_mmio.start = res->data.address64.address.minimum;
+		hyperv_mmio.end = res->data.address64.address.maximum;
 		break;
 	}
 

drivers/mailbox/pcc.c

···
 	ret = acpi_pcc_probe();
 
 	if (ret) {
-		pr_err("ACPI PCC probe failed.\n");
+		pr_debug("ACPI PCC probe failed.\n");
 		return -ENODEV;
 	}
 
···
 			pcc_mbox_probe, NULL, 0, NULL, 0);
 
 	if (!pcc_pdev) {
-		pr_err("Err creating PCC platform bundle\n");
+		pr_debug("Err creating PCC platform bundle\n");
 		return -ENODEV;
 	}
 

drivers/of/of_pci.c

···
 			unsigned char busno, unsigned char bus_max,
 			struct list_head *resources, resource_size_t *io_base)
 {
-	struct pci_host_bridge_window *window;
+	struct resource_entry *window;
 	struct resource *res;
 	struct resource *bus_range;
 	struct of_pci_range range;
···
 conversion_failed:
 	kfree(res);
 parse_failed:
-	list_for_each_entry(window, resources, list)
+	resource_list_for_each_entry(window, resources)
 		kfree(window->res);
 	pci_free_resource_list(resources);
 	kfree(bus_range);

drivers/pci/bus.c

···
 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
 			     resource_size_t offset)
 {
-	struct pci_host_bridge_window *window;
+	struct resource_entry *entry;
 
-	window = kzalloc(sizeof(struct pci_host_bridge_window), GFP_KERNEL);
-	if (!window) {
+	entry = resource_list_create_entry(res, 0);
+	if (!entry) {
 		printk(KERN_ERR "PCI: can't add host bridge window %pR\n", res);
 		return;
 	}
 
-	window->res = res;
-	window->offset = offset;
-	list_add_tail(&window->list, resources);
+	entry->offset = offset;
+	resource_list_add_tail(entry, resources);
 }
 EXPORT_SYMBOL(pci_add_resource_offset);
 
···
 
 void pci_free_resource_list(struct list_head *resources)
 {
-	struct pci_host_bridge_window *window, *tmp;
-
-	list_for_each_entry_safe(window, tmp, resources, list) {
-		list_del(&window->list);
-		kfree(window);
-	}
+	resource_list_free(resources);
 }
 EXPORT_SYMBOL(pci_free_resource_list);
 

drivers/pci/host-bridge.c

···
 			     struct resource *res)
 {
 	struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
-	struct pci_host_bridge_window *window;
+	struct resource_entry *window;
 	resource_size_t offset = 0;
 
-	list_for_each_entry(window, &bridge->windows, list) {
+	resource_list_for_each_entry(window, &bridge->windows) {
 		if (resource_contains(window->res, res)) {
 			offset = window->offset;
 			break;
···
 			     struct pci_bus_region *region)
 {
 	struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
-	struct pci_host_bridge_window *window;
+	struct resource_entry *window;
 	resource_size_t offset = 0;
 
-	list_for_each_entry(window, &bridge->windows, list) {
+	resource_list_for_each_entry(window, &bridge->windows) {
 		struct pci_bus_region bus_region;
 
 		if (resource_type(res) != resource_type(window->res))

drivers/pci/host/pci-host-generic.c

···
 	struct device *dev = pci->host.dev.parent;
 	struct device_node *np = dev->of_node;
 	resource_size_t iobase;
-	struct pci_host_bridge_window *win;
+	struct resource_entry *win;
 
 	err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pci->resources,
 					       &iobase);
 	if (err)
 		return err;
 
-	list_for_each_entry(win, &pci->resources, list) {
+	resource_list_for_each_entry(win, &pci->resources) {
 		struct resource *parent, *res = win->res;
 
 		switch (resource_type(res)) {

drivers/pci/host/pci-versatile.c

···
 	int err, mem = 1, res_valid = 0;
 	struct device_node *np = dev->of_node;
 	resource_size_t iobase;
-	struct pci_host_bridge_window *win;
+	struct resource_entry *win;
 
 	err = of_pci_get_host_bridge_resources(np, 0, 0xff, res, &iobase);
 	if (err)
 		return err;
 
-	list_for_each_entry(win, res, list) {
+	resource_list_for_each_entry(win, res, list) {
 		struct resource *parent, *res = win->res;
 
 		switch (resource_type(res)) {

drivers/pci/host/pci-xgene.c

···
 				 struct list_head *res,
 				 resource_size_t io_base)
 {
-	struct pci_host_bridge_window *window;
+	struct resource_entry *window;
 	struct device *dev = port->dev;
 	int ret;
 
-	list_for_each_entry(window, res, list) {
+	resource_list_for_each_entry(window, res) {
 		struct resource *res = window->res;
 		u64 restype = resource_type(res);
 

drivers/pci/host/pcie-xilinx.c

···
 	resource_size_t offset;
 	struct of_pci_range_parser parser;
 	struct of_pci_range range;
-	struct pci_host_bridge_window *win;
+	struct resource_entry *win;
 	int err = 0, mem_resno = 0;
 
 	/* Get the ranges */
···
 
 free_resources:
 	release_child_resources(&iomem_resource);
-	list_for_each_entry(win, &port->resources, list)
+	resource_list_for_each_entry(win, &port->resources)
 		devm_kfree(dev, win->res);
 	pci_free_resource_list(&port->resources);
 

drivers/pci/hotplug/sgi_hotplug.c

···
 	struct slot *slot = bss_hotplug_slot->private;
 	struct pci_dev *dev, *temp;
 	int rc;
-	acpi_owner_id ssdt_id = 0;
+	acpi_handle ssdt_hdl = NULL;
 
 	/* Acquire update access to the bus */
 	mutex_lock(&sn_hotplug_mutex);
···
 			if (ACPI_SUCCESS(ret) &&
 			    (adr>>16) == (slot->device_num + 1)) {
 				/* retain the owner id */
-				acpi_get_id(chandle, &ssdt_id);
+				ssdt_hdl = chandle;
 
 				ret = acpi_bus_get_device(chandle,
 							  &device);
···
 	pci_unlock_rescan_remove();
 
 	/* Remove the SSDT for the slot from the ACPI namespace */
-	if (SN_ACPI_BASE_SUPPORT() && ssdt_id) {
+	if (SN_ACPI_BASE_SUPPORT() && ssdt_hdl) {
 		acpi_status ret;
-		ret = acpi_unload_table_id(ssdt_id);
+		ret = acpi_unload_parent_table(ssdt_hdl);
 		if (ACPI_FAILURE(ret)) {
-			printk(KERN_ERR "%s: acpi_unload_table_id failed (0x%x) for id %d\n",
-			       __func__, ret, ssdt_id);
+			acpi_handle_err(ssdt_hdl,
+					"%s: acpi_unload_parent_table failed (0x%x)\n",
+					__func__, ret);
 			/* try to continue on */
 		}
 	}

drivers/pci/pci-acpi.c

···
 	return 0;
 }
 
+static bool acpi_pci_need_resume(struct pci_dev *dev)
+{
+	struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
+
+	if (!adev || !acpi_device_power_manageable(adev))
+		return false;
+
+	if (device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count)
+		return true;
+
+	if (acpi_target_system_state() == ACPI_STATE_S0)
+		return false;
+
+	return !!adev->power.flags.dsw_present;
+}
+
 static struct pci_platform_pm_ops acpi_pci_platform_pm = {
 	.is_manageable = acpi_pci_power_manageable,
 	.set_state = acpi_pci_set_power_state,
 	.choose_state = acpi_pci_choose_state,
 	.sleep_wake = acpi_pci_sleep_wake,
 	.run_wake = acpi_pci_run_wake,
+	.need_resume = acpi_pci_need_resume,
 };
 
 void acpi_pci_add_bus(struct pci_bus *bus)

drivers/pci/pci-driver.c

···
 static int pci_pm_prepare(struct device *dev)
 {
 	struct device_driver *drv = dev->driver;
-	int error = 0;
 
 	/*
 	 * Devices having power.ignore_children set may still be necessary for
···
 	if (dev->power.ignore_children)
 		pm_runtime_resume(dev);
 
-	if (drv && drv->pm && drv->pm->prepare)
-		error = drv->pm->prepare(dev);
-
-	return error;
+	if (drv && drv->pm && drv->pm->prepare) {
+		int error = drv->pm->prepare(dev);
+		if (error)
+			return error;
+	}
+	return pci_dev_keep_suspended(to_pci_dev(dev));
 }
 
 

drivers/pci/pci.c

···
 			pci_platform_pm->run_wake(dev, enable) : -ENODEV;
 }
 
+static inline bool platform_pci_need_resume(struct pci_dev *dev)
+{
+	return pci_platform_pm ? pci_platform_pm->need_resume(dev) : false;
+}
+
 /**
  * pci_raw_set_power_state - Use PCI PM registers to set the power state of
  *                           given PCI device
···
 	return false;
 }
 EXPORT_SYMBOL_GPL(pci_dev_run_wake);
+
+/**
+ * pci_dev_keep_suspended - Check if the device can stay in the suspended state.
+ * @pci_dev: Device to check.
+ *
+ * Return 'true' if the device is runtime-suspended, it doesn't have to be
+ * reconfigured due to wakeup settings difference between system and runtime
+ * suspend and the current power state of it is suitable for the upcoming
+ * (system) transition.
+ */
+bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
+{
+	struct device *dev = &pci_dev->dev;
+
+	if (!pm_runtime_suspended(dev)
+	    || (device_can_wakeup(dev) && !device_may_wakeup(dev))
+	    || platform_pci_need_resume(pci_dev))
+		return false;
+
+	return pci_target_state(pci_dev) == pci_dev->current_state;
+}
 
 void pci_config_pm_runtime_get(struct pci_dev *pdev)
 {

drivers/pci/pci.h

···
  *		for given device (the device's wake-up capability has to be
  *		enabled by @sleep_wake for this feature to work)
  *
+ * @need_resume: returns 'true' if the given device (which is currently
+ *		suspended) needs to be resumed to be configured for system
+ *		wakeup.
+ *
  * If given platform is generally capable of power managing PCI devices, all of
  * these callbacks are mandatory.
  */
···
 	pci_power_t (*choose_state)(struct pci_dev *dev);
 	int (*sleep_wake)(struct pci_dev *dev, bool enable);
 	int (*run_wake)(struct pci_dev *dev, bool enable);
+	bool (*need_resume)(struct pci_dev *dev);
 };
 
 int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
···
 void pci_disable_enabled_device(struct pci_dev *dev);
 int pci_finish_runtime_suspend(struct pci_dev *dev);
 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
+bool pci_dev_keep_suspended(struct pci_dev *dev);
 void pci_config_pm_runtime_get(struct pci_dev *dev);
 void pci_config_pm_runtime_put(struct pci_dev *dev);
 void pci_pm_init(struct pci_dev *dev);

drivers/pci/probe.c

···
 	int error;
 	struct pci_host_bridge *bridge;
 	struct pci_bus *b, *b2;
-	struct pci_host_bridge_window *window, *n;
+	struct resource_entry *window, *n;
 	struct resource *res;
 	resource_size_t offset;
 	char bus_addr[64];
···
 		printk(KERN_INFO "PCI host bridge to bus %s\n", dev_name(&b->dev));
 
 	/* Add initial resources to the bus */
-	list_for_each_entry_safe(window, n, resources, list) {
-		list_move_tail(&window->list, &bridge->windows);
+	resource_list_for_each_entry_safe(window, n, resources) {
+		list_move_tail(&window->node, &bridge->windows);
 		res = window->res;
 		offset = window->offset;
 		if (res->flags & IORESOURCE_BUS)
···
 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
 		struct pci_ops *ops, void *sysdata, struct list_head *resources)
 {
-	struct pci_host_bridge_window *window;
+	struct resource_entry *window;
 	bool found = false;
 	struct pci_bus *b;
 	int max;
 
-	list_for_each_entry(window, resources, list)
+	resource_list_for_each_entry(window, resources)
 		if (window->res->flags & IORESOURCE_BUS) {
 			found = true;
 			break;

drivers/pnp/pnpacpi/rsparser.c

···
 	struct pnp_dev *dev = data;
 	struct acpi_resource_dma *dma;
 	struct acpi_resource_vendor_typed *vendor_typed;
-	struct resource r = {0};
+	struct resource_win win = {{0}, 0};
+	struct resource *r = &win.res;
 	int i, flags;
 
-	if (acpi_dev_resource_address_space(res, &r)
-	    || acpi_dev_resource_ext_address_space(res, &r)) {
-		pnp_add_resource(dev, &r);
+	if (acpi_dev_resource_address_space(res, &win)
+	    || acpi_dev_resource_ext_address_space(res, &win)) {
+		pnp_add_resource(dev, &win.res);
 		return AE_OK;
 	}
 
-	r.flags = 0;
-	if (acpi_dev_resource_interrupt(res, 0, &r)) {
-		pnpacpi_add_irqresource(dev, &r);
-		for (i = 1; acpi_dev_resource_interrupt(res, i, &r); i++)
-			pnpacpi_add_irqresource(dev, &r);
+	r->flags = 0;
+	if (acpi_dev_resource_interrupt(res, 0, r)) {
+		pnpacpi_add_irqresource(dev, r);
+		for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++)
+			pnpacpi_add_irqresource(dev, r);
 
 		if (i > 1) {
 			/*
···
 			}
 		}
 		return AE_OK;
-	} else if (r.flags & IORESOURCE_DISABLED) {
+	} else if (r->flags & IORESOURCE_DISABLED) {
 		pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
 		return AE_OK;
 	}
···
 	case ACPI_RESOURCE_TYPE_MEMORY24:
 	case ACPI_RESOURCE_TYPE_MEMORY32:
 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
-		if (acpi_dev_resource_memory(res, &r))
-			pnp_add_resource(dev, &r);
+		if (acpi_dev_resource_memory(res, r))
+			pnp_add_resource(dev, r);
 		break;
 	case ACPI_RESOURCE_TYPE_IO:
 	case ACPI_RESOURCE_TYPE_FIXED_IO:
-		if (acpi_dev_resource_io(res, &r))
-			pnp_add_resource(dev, &r);
+		if (acpi_dev_resource_io(res, r))
+			pnp_add_resource(dev, r);
 		break;
 	case ACPI_RESOURCE_TYPE_DMA:
 		dma = &res->data.dma;
···
 	if (p->resource_type == ACPI_MEMORY_RANGE) {
 		if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 			flags = IORESOURCE_MEM_WRITEABLE;
-		pnp_register_mem_resource(dev, option_flags, p->minimum,
-					  p->minimum, 0, p->address_length,
+		pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+					  p->address.minimum, 0, p->address.address_length,
 					  flags);
 	} else if (p->resource_type == ACPI_IO_RANGE)
-		pnp_register_port_resource(dev, option_flags, p->minimum,
-					   p->minimum, 0, p->address_length,
+		pnp_register_port_resource(dev, option_flags, p->address.minimum,
+					   p->address.minimum, 0, p->address.address_length,
 					   IORESOURCE_IO_FIXED);
 }
 
···
 	if (p->resource_type == ACPI_MEMORY_RANGE) {
 		if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 			flags = IORESOURCE_MEM_WRITEABLE;
-		pnp_register_mem_resource(dev, option_flags, p->minimum,
-					  p->minimum, 0, p->address_length,
+		pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+					  p->address.minimum, 0, p->address.address_length,
 					  flags);
 	} else if (p->resource_type == ACPI_IO_RANGE)
-		pnp_register_port_resource(dev, option_flags, p->minimum,
-					   p->minimum, 0, p->address_length,
+		pnp_register_port_resource(dev, option_flags, p->address.minimum,
+					   p->address.minimum, 0, p->address.address_length,
 					   IORESOURCE_IO_FIXED);
 }
 

drivers/sfi/sfi_core.c

···
  * Check for common case that we can re-use mapping to SYST,
  * which requires syst_pa, syst_va to be initialized.
  */
-struct sfi_table_header *sfi_map_table(u64 pa)
+static struct sfi_table_header *sfi_map_table(u64 pa)
 {
 	struct sfi_table_header *th;
 	u32 length;
···
  * Undoes effect of sfi_map_table() by unmapping table
  * if it did not completely fit on same page as SYST.
  */
-void sfi_unmap_table(struct sfi_table_header *th)
+static void sfi_unmap_table(struct sfi_table_header *th)
 {
 	if (!TABLE_ON_PAGE(syst_va, th, th->len))
 		sfi_unmap_memory(th, TABLE_ON_PAGE(th, th, th->len) ?

drivers/usb/core/hub.c

···
 	return status;
 }
 
-#ifdef	CONFIG_PM
-
 int usb_remote_wakeup(struct usb_device *udev)
 {
 	int	status = 0;
···
 	dev_dbg(&port_dev->dev, "resume, status %d\n", ret);
 	return connect_change;
 }
-
-#else
-
-static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
-		u16 portstatus, u16 portchange)
-{
-	return 0;
-}
-
-#endif
 
 static int check_ports_changed(struct usb_hub *hub)
 {

drivers/xen/xen-acpi-memhotplug.c

···
 	list_for_each_entry(info, &mem_device->res_list, list) {
 		if ((info->caching == address64.info.mem.caching) &&
 		    (info->write_protect == address64.info.mem.write_protect) &&
-		    (info->start_addr + info->length == address64.minimum)) {
-			info->length += address64.address_length;
+		    (info->start_addr + info->length == address64.address.minimum)) {
+			info->length += address64.address.address_length;
 			return AE_OK;
 		}
 	}
···
 	INIT_LIST_HEAD(&new->list);
 	new->caching = address64.info.mem.caching;
 	new->write_protect = address64.info.mem.write_protect;
-	new->start_addr = address64.minimum;
-	new->length = address64.address_length;
+	new->start_addr = address64.address.minimum;
+	new->length = address64.address.address_length;
 	list_add_tail(&new->list, &mem_device->res_list);
 
 	return AE_OK;

include/acpi/acbuffer.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/acconfig.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/acexcep.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/acnames.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/acoutput.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/acpi.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/acpiosxf.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/acpixf.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20141107
+#define ACPI_CA_VERSION                 0x20150204
 
 #include <acpi/acconfig.h>
 #include <acpi/actypes.h>
···
 							  address,
 							  void *context))
 ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_install_gpe_raw_handler(acpi_handle
+							      gpe_device,
+							      u32 gpe_number,
+							      u32 type,
+							      acpi_gpe_handler
+							      address,
+							      void *context))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
 				 acpi_remove_gpe_handler(acpi_handle gpe_device,
 							 u32 gpe_number,
 							 acpi_gpe_handler
···
  * Divergences
  */
 ACPI_GLOBAL(u8, acpi_gbl_permanent_mmap);
-
-ACPI_EXTERNAL_RETURN_STATUS(acpi_status
-			    acpi_get_id(acpi_handle object,
-					acpi_owner_id * out_type))
-
-ACPI_EXTERNAL_RETURN_STATUS(acpi_status acpi_unload_table_id(acpi_owner_id id))
 
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
 			    acpi_get_table_with_size(acpi_string signature,

include/acpi/acrestyp.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 	u8                                      max_address_fixed; \
 	union acpi_resource_attribute           info;
 
-struct acpi_resource_address {
-ACPI_RESOURCE_ADDRESS_COMMON};
-
-struct acpi_resource_address16 {
-	ACPI_RESOURCE_ADDRESS_COMMON u16 granularity;
+struct acpi_address16_attribute {
+	u16 granularity;
 	u16 minimum;
 	u16 maximum;
 	u16 translation_offset;
 	u16 address_length;
-	struct acpi_resource_source resource_source;
 };
 
-struct acpi_resource_address32 {
-	ACPI_RESOURCE_ADDRESS_COMMON u32 granularity;
+struct acpi_address32_attribute {
+	u32 granularity;
 	u32 minimum;
 	u32 maximum;
 	u32 translation_offset;
 	u32 address_length;
-	struct acpi_resource_source resource_source;
 };
 
-struct acpi_resource_address64 {
-	ACPI_RESOURCE_ADDRESS_COMMON u64 granularity;
-	u64 minimum;
-	u64 maximum;
-	u64 translation_offset;
-	u64 address_length;
-	struct acpi_resource_source resource_source;
-};
-
-struct acpi_resource_extended_address64 {
-	ACPI_RESOURCE_ADDRESS_COMMON u8 revision_ID;
+struct acpi_address64_attribute {
 	u64 granularity;
 	u64 minimum;
 	u64 maximum;
 	u64 translation_offset;
 	u64 address_length;
+};
+
+struct acpi_resource_address {
+ACPI_RESOURCE_ADDRESS_COMMON};
+
+struct acpi_resource_address16 {
+	ACPI_RESOURCE_ADDRESS_COMMON struct acpi_address16_attribute address;
+	struct acpi_resource_source resource_source;
+};
+
+struct acpi_resource_address32 {
+	ACPI_RESOURCE_ADDRESS_COMMON struct acpi_address32_attribute address;
+	struct acpi_resource_source resource_source;
+};
+
+struct acpi_resource_address64 {
+	ACPI_RESOURCE_ADDRESS_COMMON struct acpi_address64_attribute address;
+	struct acpi_resource_source resource_source;
+};
+
+struct acpi_resource_extended_address64 {
+	ACPI_RESOURCE_ADDRESS_COMMON u8 revision_ID;
+	struct acpi_address64_attribute address;
 	u64 type_specific;
 };
 

include/acpi/actbl.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/actbl1.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/actbl2.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/actbl3.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/actypes.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 /*
  * GPE info flags - Per GPE
  * +-------+-+-+---+
- * |  7:4  |3|2|1:0|
+ * |  7:5  |4|3|2:0|
  * +-------+-+-+---+
  *     |    | |  |
  *     |    | |  +-- Type of dispatch:to method, handler, notify, or none
···
 #define ACPI_GPE_DISPATCH_METHOD        (u8) 0x01
 #define ACPI_GPE_DISPATCH_HANDLER       (u8) 0x02
 #define ACPI_GPE_DISPATCH_NOTIFY        (u8) 0x03
-#define ACPI_GPE_DISPATCH_MASK          (u8) 0x03
+#define ACPI_GPE_DISPATCH_RAW_HANDLER   (u8) 0x04
+#define ACPI_GPE_DISPATCH_MASK          (u8) 0x07
+#define ACPI_GPE_DISPATCH_TYPE(flags)   ((u8) ((flags) & ACPI_GPE_DISPATCH_MASK))
 
-#define ACPI_GPE_LEVEL_TRIGGERED        (u8) 0x04
+#define ACPI_GPE_LEVEL_TRIGGERED        (u8) 0x08
 #define ACPI_GPE_EDGE_TRIGGERED         (u8) 0x00
-#define ACPI_GPE_XRUPT_TYPE_MASK        (u8) 0x04
+#define ACPI_GPE_XRUPT_TYPE_MASK        (u8) 0x08
 
-#define ACPI_GPE_CAN_WAKE               (u8) 0x08
+#define ACPI_GPE_CAN_WAKE               (u8) 0x10
 
 /*
  * Flags for GPE and Lock interfaces

include/acpi/platform/acenv.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/platform/acenvex.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/platform/acgcc.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/platform/aclinux.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/acpi/platform/aclinuxex.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

include/linux/acpi.h

···
 
 #include <linux/errno.h>
 #include <linux/ioport.h>	/* for struct resource */
+#include <linux/resource_ext.h>
 #include <linux/device.h>
 #include <linux/property.h>
 
···
 int acpi_map_cpu(acpi_handle handle, int physid, int *pcpu);
 int acpi_unmap_cpu(int cpu);
 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
+
+#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
+int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr);
+#endif
 
 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base);
 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base);
···
 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res);
 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res);
 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
-				     struct resource *res);
+				     struct resource_win *win);
 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
-					 struct resource *res);
+					 struct resource_win *win);
 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 				 struct resource *res);
-
-struct resource_list_entry {
-	struct list_head node;
-	struct resource res;
-};
 
 void acpi_dev_free_resource_list(struct list_head *list);
 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
 			   int (*preproc)(struct acpi_resource *, void *),
 			   void *preproc_data);
+int acpi_dev_filter_resource_type(struct acpi_resource *ares,
+				  unsigned long types);
+
+static inline int acpi_dev_filter_resource_type_cb(struct acpi_resource *ares,
+						   void *arg)
+{
+	return acpi_dev_filter_resource_type(ares, (unsigned long)arg);
+}
 
 int acpi_check_resource_conflict(const struct resource *res);
 

include/linux/cpufreq.h

···
 	unsigned int		shared_type; /* ACPI: ANY or ALL affected CPUs
 						should set cpufreq */
 	unsigned int		cpu;    /* cpu nr of CPU managing this policy */
-	unsigned int		last_cpu; /* cpu nr of previous CPU that managed
-					   * this policy */
 	struct clk		*clk;
 	struct cpufreq_cpuinfo	cpuinfo;/* see above */
 
···
 	spinlock_t		transition_lock;
 	wait_queue_head_t	transition_wait;
 	struct task_struct	*transition_task; /* Task which is doing the transition */
+
+	/* cpufreq-stats */
+	struct cpufreq_stats	*stats;
 
 	/* For cpufreq driver's internal use */
 	void			*driver_data;
···
 #define CPUFREQ_INCOMPATIBLE		(1)
 #define CPUFREQ_NOTIFY			(2)
 #define CPUFREQ_START			(3)
-#define CPUFREQ_UPDATE_POLICY_CPU	(4)
-#define CPUFREQ_CREATE_POLICY		(5)
-#define CPUFREQ_REMOVE_POLICY		(6)
+#define CPUFREQ_CREATE_POLICY		(4)
+#define CPUFREQ_REMOVE_POLICY		(5)
 
 #ifdef CONFIG_CPU_FREQ
 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);

include/linux/devfreq-event.h

···
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2014 Samsung Electronics
+ * Author: Chanwoo Choi <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_DEVFREQ_EVENT_H__
+#define __LINUX_DEVFREQ_EVENT_H__
+
+#include <linux/device.h>
+
+/**
+ * struct devfreq_event_dev - the devfreq-event device
+ *
+ * @node	: Contain the devfreq-event device that have been registered.
+ * @dev		: the device registered by devfreq-event class. dev.parent is
+ *		  the device using devfreq-event.
+ * @lock	: a mutex to protect accessing devfreq-event.
+ * @enable_count: the number of enable function have been called.
+ * @desc	: the description for devfreq-event device.
+ *
+ * This structure contains devfreq-event device information.
+ */
+struct devfreq_event_dev {
+	struct list_head node;
+
+	struct device dev;
+	struct mutex lock;
+	u32 enable_count;
+
+	const struct devfreq_event_desc *desc;
+};
+
+/**
+ * struct devfreq_event_data - the devfreq-event data
+ *
+ * @load_count	: load count of devfreq-event device for the given period.
+ * @total_count	: total count of devfreq-event device for the given period.
+ *		  each count may represent a clock cycle, a time unit
+ *		  (ns/us/...), or anything the device driver wants.
+ *		  Generally, utilization is load_count / total_count.
+ *
+ * This structure contains the data of devfreq-event device for polling period.
+ */
+struct devfreq_event_data {
+	unsigned long load_count;
+	unsigned long total_count;
+};
+
+/**
+ * struct devfreq_event_ops - the operations of devfreq-event device
+ *
+ * @enable	: Enable the devfreq-event device.
+ * @disable	: Disable the devfreq-event device.
+ * @reset	: Reset all setting of the devfreq-event device.
+ * @set_event	: Set the specific event type for the devfreq-event device.
+ * @get_event	: Get the result of the devfreq-event devie with specific
+ *		  event type.
+ *
+ * This structure contains devfreq-event device operations which can be
+ * implemented by devfreq-event device drivers.
+ */
+struct devfreq_event_ops {
+	/* Optional functions */
+	int (*enable)(struct devfreq_event_dev *edev);
+	int (*disable)(struct devfreq_event_dev *edev);
+	int (*reset)(struct devfreq_event_dev *edev);
+
+	/* Mandatory functions */
+	int (*set_event)(struct devfreq_event_dev *edev);
+	int (*get_event)(struct devfreq_event_dev *edev,
+			 struct devfreq_event_data *edata);
+};
+
+/**
+ * struct devfreq_event_desc - the descriptor of devfreq-event device
+ *
+ * @name	: the name of devfreq-event device.
+ * @driver_data	: the private data for devfreq-event driver.
+ * @ops		: the operation to control devfreq-event device.
+ *
+ * Each devfreq-event device is described with a this structure.
+ * This structure contains the various data for devfreq-event device.
+ */
+struct devfreq_event_desc {
+	const char *name;
+	void *driver_data;
+
+	struct devfreq_event_ops *ops;
+};
+
+#if defined(CONFIG_PM_DEVFREQ_EVENT)
+extern int devfreq_event_enable_edev(struct devfreq_event_dev *edev);
+extern int devfreq_event_disable_edev(struct devfreq_event_dev *edev);
+extern bool devfreq_event_is_enabled(struct devfreq_event_dev *edev);
+extern int devfreq_event_set_event(struct devfreq_event_dev *edev);
+extern int devfreq_event_get_event(struct devfreq_event_dev *edev,
+				struct devfreq_event_data *edata);
+extern int devfreq_event_reset_event(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+				struct device *dev, int index);
+extern int devfreq_event_get_edev_count(struct device *dev);
+extern struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+				struct devfreq_event_desc *desc);
+extern int devfreq_event_remove_edev(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+				struct devfreq_event_desc *desc);
+extern void devm_devfreq_event_remove_edev(struct device *dev,
+				struct devfreq_event_dev *edev);
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+	return edev->desc->driver_data;
+}
+#else
+static inline int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+	return -EINVAL;
+}
+
+static inline int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+	return -EINVAL;
+}
+
+static inline bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+	return false;
+}
+
+static inline int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+	return -EINVAL;
+}
+
+static inline int devfreq_event_get_event(struct devfreq_event_dev *edev,
+					struct devfreq_event_data *edata)
+{
+	return -EINVAL;
+}
+
+static inline int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+	return -EINVAL;
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+					struct device *dev, int index)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_get_edev_count(struct device *dev)
+{
+	return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+					struct devfreq_event_desc *desc)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+	return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devm_devfreq_event_add_edev(
+					struct device *dev,
+					struct devfreq_event_desc *desc)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline void devm_devfreq_event_remove_edev(struct device *dev,
+					struct devfreq_event_dev *edev)
+{
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+	return NULL;
+}
+#endif /* CONFIG_PM_DEVFREQ_EVENT */
+
+#endif /* __LINUX_DEVFREQ_EVENT_H__ */

include/linux/pci.h

···
 #include <linux/atomic.h>
 #include <linux/device.h>
 #include <linux/io.h>
+#include <linux/resource_ext.h>
 #include <uapi/linux/pci.h>
 
 #include <linux/pci_ids.h>
···
 	return (pdev->error_state != pci_channel_io_normal);
 }
 
-struct pci_host_bridge_window {
-	struct list_head list;
-	struct resource *res;		/* host bridge aperture (CPU address) */
-	resource_size_t offset;		/* bus address + offset = CPU address */
-};
-
 struct pci_host_bridge {
 	struct device dev;
 	struct pci_bus *bus;		/* root bus */
-	struct list_head windows;	/* pci_host_bridge_windows */
+	struct list_head windows;	/* resource_entry */
 	void (*release_fn)(struct pci_host_bridge *);
 	void *release_data;
 };

include/linux/pm.h

···
 
 extern void update_pm_runtime_accounting(struct device *dev);
 extern int dev_pm_get_subsys_data(struct device *dev);
-extern int dev_pm_put_subsys_data(struct device *dev);
+extern void dev_pm_put_subsys_data(struct device *dev);
 
 /*
  * Power domains provide callbacks that are executed during system suspend,

include/linux/pm_domain.h

···
 	struct pm_domain_data base;
 	struct gpd_timing_data td;
 	struct notifier_block nb;
-	struct mutex lock;
-	unsigned int refcount;
 	int need_restore;
 };
 
···
 
 extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
 				  struct device *dev);
-extern void pm_genpd_dev_need_restore(struct device *dev, bool val);
 extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
 				  struct generic_pm_domain *new_subdomain);
 extern int pm_genpd_add_subdomain_names(const char *master_name,
···
 {
 	return -ENOSYS;
 }
-static inline void pm_genpd_dev_need_restore(struct device *dev, bool val) {}
 static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
 					 struct generic_pm_domain *new_sd)
 {

include/linux/resource_ext.h

···
+/*
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Jiang Liu <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+#ifndef _LINUX_RESOURCE_EXT_H
+#define _LINUX_RESOURCE_EXT_H
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+
+/* Represent resource window for bridge devices */
+struct resource_win {
+	struct resource res;		/* In master (CPU) address space */
+	resource_size_t offset;		/* Translation offset for bridge */
+};
+
+/*
+ * Common resource list management data structure and interfaces to support
+ * ACPI, PNP and PCI host bridge etc.
+ */
+struct resource_entry {
+	struct list_head	node;
+	struct resource		*res;	/* In master (CPU) address space */
+	resource_size_t		offset;	/* Translation offset for bridge */
+	struct resource		__res;	/* Default storage for res */
+};
+
+extern struct resource_entry *
+resource_list_create_entry(struct resource *res, size_t extra_size);
+extern void resource_list_free(struct list_head *head);
+
+static inline void resource_list_add(struct resource_entry *entry,
+				     struct list_head *head)
+{
+	list_add(&entry->node, head);
+}
+
+static inline void resource_list_add_tail(struct resource_entry *entry,
+					  struct list_head *head)
+{
+	list_add_tail(&entry->node, head);
+}
+
+static inline void resource_list_del(struct resource_entry *entry)
+{
+	list_del(&entry->node);
+}
+
+static inline void resource_list_free_entry(struct resource_entry *entry)
+{
+	kfree(entry);
+}
+
+static inline void
+resource_list_destroy_entry(struct resource_entry *entry)
+{
+	resource_list_del(entry);
+	resource_list_free_entry(entry);
+}
+
+#define resource_list_for_each_entry(entry, list)	\
+	list_for_each_entry((entry), (list), node)
+
+#define resource_list_for_each_entry_safe(entry, tmp, list)	\
+	list_for_each_entry_safe((entry), (tmp), (list), node)
+
+#endif /* _LINUX_RESOURCE_EXT_H */

kernel/power/qos.c

···
 #include <linux/platform_device.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 
 #include <linux/uaccess.h>
 #include <linux/export.h>
···
 {
 	c->target_value = value;
 }
+
+static inline int pm_qos_get_value(struct pm_qos_constraints *c);
+static int pm_qos_dbg_show_requests(struct seq_file *s, void *unused)
+{
+	struct pm_qos_object *qos = (struct pm_qos_object *)s->private;
+	struct pm_qos_constraints *c;
+	struct pm_qos_request *req;
+	char *type;
+	unsigned long flags;
+	int tot_reqs = 0;
+	int active_reqs = 0;
+
+	if (IS_ERR_OR_NULL(qos)) {
+		pr_err("%s: bad qos param!\n", __func__);
+		return -EINVAL;
+	}
+	c = qos->constraints;
+	if (IS_ERR_OR_NULL(c)) {
+		pr_err("%s: Bad constraints on qos?\n", __func__);
+		return -EINVAL;
+	}
+
+	/* Lock to ensure we have a snapshot */
+	spin_lock_irqsave(&pm_qos_lock, flags);
+	if (plist_head_empty(&c->list)) {
+		seq_puts(s, "Empty!\n");
+		goto out;
+	}
+
+	switch (c->type) {
+	case PM_QOS_MIN:
+		type = "Minimum";
+		break;
+	case PM_QOS_MAX:
+		type = "Maximum";
+		break;
+	case PM_QOS_SUM:
+		type = "Sum";
+		break;
+	default:
+		type = "Unknown";
+	}
+
+	plist_for_each_entry(req, &c->list, node) {
+		char *state = "Default";
+
+		if ((req->node).prio != c->default_value) {
+			active_reqs++;
+			state = "Active";
+		}
+		tot_reqs++;
+		seq_printf(s, "%d: %d: %s\n", tot_reqs,
+			   (req->node).prio, state);
+	}
+
+	seq_printf(s, "Type=%s, Value=%d, Requests: active=%d / total=%d\n",
+		   type, pm_qos_get_value(c), active_reqs, tot_reqs);
+
+out:
+	spin_unlock_irqrestore(&pm_qos_lock, flags);
+	return 0;
+}
+
+static int pm_qos_dbg_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, pm_qos_dbg_show_requests,
+			   inode->i_private);
+}
+
+static const struct file_operations pm_qos_debug_fops = {
+	.open           = pm_qos_dbg_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = single_release,
+};
 
 /**
  * pm_qos_update_target - manages the constraints list and calls the notifiers
···
 EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
 
 /* User space interface to PM QoS classes via misc devices */
-static int register_pm_qos_misc(struct pm_qos_object *qos)
+static int register_pm_qos_misc(struct pm_qos_object *qos, struct dentry *d)
 {
 	qos->pm_qos_power_miscdev.minor = MISC_DYNAMIC_MINOR;
 	qos->pm_qos_power_miscdev.name = qos->name;
 	qos->pm_qos_power_miscdev.fops = &pm_qos_power_fops;
+
+	if (d) {
+		(void)debugfs_create_file(qos->name, S_IRUGO, d,
+					  (void *)qos, &pm_qos_debug_fops);
+	}
 
 	return misc_register(&qos->pm_qos_power_miscdev);
 }
···
 {
 	int ret = 0;
 	int i;
+	struct dentry *d;
 
 	BUILD_BUG_ON(ARRAY_SIZE(pm_qos_array) != PM_QOS_NUM_CLASSES);
 
+	d = debugfs_create_dir("pm_qos", NULL);
+	if (IS_ERR_OR_NULL(d))
+		d = NULL;
+
 	for (i = PM_QOS_CPU_DMA_LATENCY; i < PM_QOS_NUM_CLASSES; i++) {
-		ret = register_pm_qos_misc(pm_qos_array[i]);
+		ret = register_pm_qos_misc(pm_qos_array[i], d);
 		if (ret < 0) {
 			printk(KERN_ERR "pm_qos_param: %s setup failed\n",
 			       pm_qos_array[i]->name);

kernel/power/snapshot.c

···
 /**
  * free_unnecessary_pages - Release preallocated pages not needed for the image
  */
-static void free_unnecessary_pages(void)
+static unsigned long free_unnecessary_pages(void)
 {
-	unsigned long save, to_free_normal, to_free_highmem;
+	unsigned long save, to_free_normal, to_free_highmem, free;
 
 	save = count_data_pages();
 	if (alloc_normal >= save) {
···
 		else
 			to_free_normal = 0;
 	}
+	free = to_free_normal + to_free_highmem;
 
 	memory_bm_position_reset(&copy_bm);
 
···
 		swsusp_unset_page_free(page);
 		__free_page(page);
 	}
+
+	return free;
 }
 
 /**
···
 	 * pages in memory, but we have allocated more.  Release the excessive
 	 * ones now.
 	 */
-	free_unnecessary_pages();
+	pages -= free_unnecessary_pages();
 
  out:
 	stop = ktime_get();
···
 		free_image_page(buffer, PG_UNSAFE_CLEAR);
 }
 #else
-static inline int get_safe_write_buffer(void) { return 0; }
-
 static unsigned int
 count_highmem_image_pages(struct memory_bitmap *bm) { return 0; }
 

kernel/resource.c

···
 #include <linux/device.h>
 #include <linux/pfn.h>
 #include <linux/mm.h>
+#include <linux/resource_ext.h>
 #include <asm/io.h>
 
 
···
 
 	return err;
 }
+
+struct resource_entry *resource_list_create_entry(struct resource *res,
+						  size_t extra_size)
+{
+	struct resource_entry *entry;
+
+	entry = kzalloc(sizeof(*entry) + extra_size, GFP_KERNEL);
+	if (entry) {
+		INIT_LIST_HEAD(&entry->node);
+		entry->res = res ? res : &entry->__res;
+	}
+
+	return entry;
+}
+EXPORT_SYMBOL(resource_list_create_entry);
+
+void resource_list_free(struct list_head *head)
+{
+	struct resource_entry *entry, *tmp;
+
+	list_for_each_entry_safe(entry, tmp, head, node)
+		resource_list_destroy_entry(entry);
+}
+EXPORT_SYMBOL(resource_list_free);
 
 static int __init strict_iomem(char *str)
 {

kernel/trace/power-traces.c

···
 #define CREATE_TRACE_POINTS
 #include <trace/events/power.h>
 
+EXPORT_TRACEPOINT_SYMBOL_GPL(suspend_resume);
 EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle);
 

tools/power/acpi/common/cmfsize.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/common/getopt.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/os_specific/service_layers/oslibcfs.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/os_specific/service_layers/oslinuxtbl.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/os_specific/service_layers/osunixdir.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/os_specific/service_layers/osunixmap.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/os_specific/service_layers/osunixxf.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/tools/acpidump/acpidump.h

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/tools/acpidump/apdump.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/tools/acpidump/apfiles.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/acpi/tools/acpidump/apmain.c

···
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

tools/power/cpupower/Makefile

···
 
 $(OUTPUT)cpupower: $(UTIL_OBJS) $(OUTPUT)libcpupower.so.$(LIB_MAJ)
 	$(ECHO) "  CC      " $@
-	$(QUIET) $(CC) $(CFLAGS) $(LDFLAGS) $(UTIL_OBJS) -lcpupower -lrt -lpci -L$(OUTPUT) -o $@
+	$(QUIET) $(CC) $(CFLAGS) $(LDFLAGS) $(UTIL_OBJS) -lcpupower -Wl,-rpath=./ -lrt -lpci -L$(OUTPUT) -o $@
 	$(QUIET) $(STRIPCMD) $@
 
 $(OUTPUT)po/$(PACKAGE).pot: $(UTIL_SRC)

tools/power/x86/turbostat/turbostat.8

···
 .RB [ "\-i interval_sec" ]
 .SH DESCRIPTION
 \fBturbostat \fP reports processor topology, frequency,
-idle power-state statistics, temperature and power on modern X86 processors.
-Either \fBcommand\fP is forked and statistics are printed
-upon its completion, or statistics are printed periodically.
+idle power-state statistics, temperature and power on X86 processors.
+There are two ways to invoke turbostat.
+The first method is to supply a
+\fBcommand\fP, which is forked and statistics are printed
+upon its completion.
+The second method is to omit the command,
+and turbodstat will print statistics every 5 seconds.
+The 5-second interval can changed using the -i option.
 
-\fBturbostat \fP
-must be run on root, and
-minimally requires that the processor
-supports an "invariant" TSC, plus the APERF and MPERF MSRs.
-Additional information is reported depending on hardware counter support.
-
+Some information is not availalbe on older processors.
 .SS Options
 The \fB-p\fP option limits output to the 1st thread in 1st core of each package.
 .PP
···
  ...
 .fi
 The \fBmax efficiency\fP frequency, a.k.a. Low Frequency Mode, is the frequency
-available at the minimum package voltage.  The \fBTSC frequency\fP is the nominal
-maximum frequency of the processor if turbo-mode were not available.  This frequency
+available at the minimum package voltage.  The \fBTSC frequency\fP is the base
+frequency of the processor -- this should match the brand string
+in /proc/cpuinfo.  This base frequency
 should be sustainable on all CPUs indefinitely, given nominal power and cooling.
 The remaining rows show what maximum turbo frequency is possible
-depending on the number of idle cores.  Note that this information is
-not available on all processors.
+depending on the number of idle cores.  Note that not all information is
+available on all processors.
 .SH FORK EXAMPLE
 If turbostat is invoked with a command, it will fork that command
 and output the statistics gathered when the command exits.
···
 
 .B "turbostat "
 must be run as root.
+Alternatively, non-root users can be enabled to run turbostat this way:
+
+# setcap cap_sys_rawio=ep ./turbostat
+
+# chmod +r /dev/cpu/*/msr
 
 .B "turbostat "
 reads hardware counters, but doesn't write them.
···
 
 \fBturbostat \fP
 may work poorly on Linux-2.6.20 through 2.6.29,
-as \fBacpi-cpufreq \fPperiodically cleared the APERF and MPERF
+as \fBacpi-cpufreq \fPperiodically cleared the APERF and MPERF MSRs
 in those kernels.
 
-If the TSC column does not make sense, then
-the other numbers will also make no sense.
-Turbostat is lightweight, and its data collection is not atomic.
-These issues are usually caused by an extremely short measurement
-interval (much less than 1 second), or system activity that prevents
-turbostat from being able to run on all CPUS to quickly collect data.
+AVG_MHz = APERF_delta/measurement_interval.  This is the actual
+number of elapsed cycles divided by the entire sample interval --
+including idle time.  Note that this calculation is resiliant
+to systems lacking a non-stop TSC.
+
+TSC_MHz = TSC_delta/measurement_interval.
+On a system with an invariant TSC, this value will be constant
+and will closely match the base frequency value shown
+in the brand string in /proc/cpuinfo.  On a system where
+the TSC stops in idle, TSC_MHz will drop
+below the processor's base frequency.
+
+%Busy = MPERF_delta/TSC_delta
+
+Bzy_MHz = TSC_delta/APERF_delta/MPERF_delta/measurement_interval
+
+Note that these calculations depend on TSC_delta, so they
+are not reliable during intervals when TSC_MHz is not running at the base frequency.
+
+Turbostat data collection is not atomic.
+Extremely short measurement intervals (much less than 1 second),
+or system activity that prevents turbostat from being able
+to run on all CPUS to quickly collect data, will result in
+inconsistent results.
 
 The APERF, MPERF MSRs are defined to count non-halted cycles.
 Although it is not guaranteed by the architecture, turbostat assumes

tools/power/x86/turbostat/turbostat.c

···
 #include <ctype.h>
 #include <sched.h>
 #include <cpuid.h>
+#include <linux/capability.h>
+#include <errno.h>
 
 char *proc_stat = "/proc/stat";
 unsigned int interval_sec = 5;	/* set with -i interval_sec */
···
 unsigned int units = 1000000;	/* MHz etc */
 unsigned int genuine_intel;
 unsigned int has_invariant_tsc;
-unsigned int do_nehalem_platform_info;
-unsigned int do_nehalem_turbo_ratio_limit;
+unsigned int do_nhm_platform_info;
+unsigned int do_nhm_turbo_ratio_limit;
 unsigned int do_ivt_turbo_ratio_limit;
 unsigned int extra_msr_offset32;
 unsigned int extra_msr_offset64;
···
 unsigned int tcc_activation_temp_override;
 double rapl_power_units, rapl_energy_units, rapl_time_units;
 double rapl_joule_counter_range;
+unsigned int do_core_perf_limit_reasons;
+unsigned int do_gfx_perf_limit_reasons;
+unsigned int do_ring_perf_limit_reasons;
 
 #define RAPL_PKG		(1 << 0)
 					/* 0x610 MSR_PKG_POWER_LIMIT */
···
 	sprintf(pathname, "/dev/cpu/%d/msr", cpu);
 	fd = open(pathname, O_RDONLY);
 	if (fd < 0)
-		return -1;
+		err(-1, "%s open failed, try chown or chmod +r /dev/cpu/*/msr, or run as root", pathname);
 
 	retval = pread(fd, msr, sizeof *msr, offset);
 	close(fd);
 
-	if (retval != sizeof *msr) {
-		fprintf(stderr, "%s offset 0x%llx read failed\n", pathname, (unsigned long long)offset);
-		return -1;
-	}
+	if (retval != sizeof *msr)
+		err(-1, "%s offset 0x%llx read failed", pathname, (unsigned long long)offset);
 
 	return 0;
 }
···
 		outp += sprintf(outp, "     CPU");
 	if (has_aperf)
 		outp += sprintf(outp, " Avg_MHz");
-	if (do_nhm_cstates)
+	if (has_aperf)
 		outp += sprintf(outp, "   %%Busy");
 	if (has_aperf)
 		outp += sprintf(outp, " Bzy_MHz");
···
 			outp += sprintf(outp, "   PKG_%%");
 		if (do_rapl & RAPL_DRAM_PERF_STATUS)
 			outp += sprintf(outp, "   RAM_%%");
-	} else {
+	} else if (do_rapl && rapl_joules) {
 		if (do_rapl & RAPL_PKG)
 			outp += sprintf(outp, "   Pkg_J");
 		if (do_rapl & RAPL_CORES)
···
 			outp += sprintf(outp, "%8d", t->cpu_id);
 	}
 
-	/* AvgMHz */
+	/* Avg_MHz */
 	if (has_aperf)
 		outp += sprintf(outp, "%8.0f",
 			1.0 / units * t->aperf / interval_float);
 
-	/* %c0 */
-	if (do_nhm_cstates) {
+	/* %Busy */
+	if (has_aperf) {
 		if (!skip_c0)
 			outp += sprintf(outp, "%8.2f", 100.0 * t->mperf/t->tsc);
 		else
 			outp += sprintf(outp, "********");
 	}
 
-	/* BzyMHz */
+	/* Bzy_MHz */
 	if (has_aperf)
 		outp += sprintf(outp, "%8.0f",
 			1.0 * t->tsc / units * t->aperf / t->mperf / interval_float);
 
-	/* TSC */
+	/* TSC_MHz */
 	outp += sprintf(outp, "%8.0f", 1.0 * t->tsc/units/interval_float);
 
 	/* SMI */
···
 			outp += sprintf(outp, fmt8, 100.0 * p->rapl_pkg_perf_status * rapl_time_units / interval_float);
 		if (do_rapl & RAPL_DRAM_PERF_STATUS)
 			outp += sprintf(outp, fmt8, 100.0 * p->rapl_dram_perf_status * rapl_time_units / interval_float);
-	} else {
+	} else if (do_rapl && rapl_joules) {
 		if (do_rapl & RAPL_PKG)
 			outp += sprintf(outp, fmt8,
 					p->energy_pkg * rapl_energy_units);
···
 			outp += sprintf(outp, fmt8, 100.0 * p->rapl_pkg_perf_status * rapl_time_units / interval_float);
 		if (do_rapl & RAPL_DRAM_PERF_STATUS)
 			outp += sprintf(outp, fmt8, 100.0 * p->rapl_dram_perf_status * rapl_time_units / interval_float);
-	outp += sprintf(outp, fmt8, interval_float);
 
+		outp += sprintf(outp, fmt8, interval_float);
 	}
 done:
 	outp += sprintf(outp, "\n");
···
 
 	old->c1 = new->c1 - old->c1;
 
-	if ((new->aperf > old->aperf) && (new->mperf > old->mperf)) {
-		old->aperf = new->aperf - old->aperf;
-		old->mperf = new->mperf - old->mperf;
-	} else {
+	if (has_aperf) {
+		if ((new->aperf > old->aperf) && (new->mperf > old->mperf)) {
+			old->aperf = new->aperf - old->aperf;
+			old->mperf = new->mperf - old->mperf;
+		} else {
 
-		if (!aperf_mperf_unstable) {
-			fprintf(stderr, "%s: APERF or MPERF went backwards *\n", progname);
-			fprintf(stderr, "* Frequency results do not cover entire interval *\n");
-			fprintf(stderr, "* fix this by running Linux-2.6.30 or later *\n");
+			if (!aperf_mperf_unstable) {
+				fprintf(stderr, "%s: APERF or MPERF went backwards *\n", progname);
+				fprintf(stderr, "* Frequency results do not cover entire interval *\n");
+				fprintf(stderr, "* fix this by running Linux-2.6.30 or later *\n");
 
-			aperf_mperf_unstable = 1;
+				aperf_mperf_unstable = 1;
+			}
+			/*
+			 * mperf delta is likely a huge "positive" number
+			 * can not use it for calculating c0 time
+			 */
+			skip_c0 = 1;
+			skip_c1 = 1;
 		}
-		/*
-		 * mperf delta is likely a huge "positive" number
-		 * can not use it for calculating c0 time
-		 */
-		skip_c0 = 1;
-		skip_c1 = 1;
 	}
 
 
···
 	unsigned long long msr;
 	unsigned int ratio;
 
-	if (!do_nehalem_platform_info)
+	if (!do_nhm_platform_info)
 		return;
 
 	get_msr(0, MSR_NHM_PLATFORM_INFO, &msr);
···
 	}
 	fprintf(stderr, ")\n");
 
-	if (!do_nehalem_turbo_ratio_limit)
+	if (!do_nhm_turbo_ratio_limit)
 		return;
 
 	get_msr(0, MSR_NHM_TURBO_RATIO_LIMIT, &msr);
···
 	if (ratio)
 		fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 1 active cores\n",
 			ratio, bclk, ratio * bclk);
+
 }
 
 void free_all_buffers(void)
···
 	struct stat sb;
 
 	if (stat("/dev/cpu/0/msr", &sb))
-		err(-5, "no /dev/cpu/0/msr\n"
-		    "Try \"# modprobe msr\"");
+		err(-5, "no /dev/cpu/0/msr, Try \"# modprobe msr\" ");
 }
 
-void check_super_user()
+void check_permissions()
 {
-	if (getuid() != 0)
-		errx(-6, "must be root");
+	struct __user_cap_header_struct cap_header_data;
+	cap_user_header_t cap_header = &cap_header_data;
+	struct __user_cap_data_struct cap_data_data;
+	cap_user_data_t cap_data = &cap_data_data;
+	extern int capget(cap_user_header_t hdrp, cap_user_data_t datap);
+	int do_exit = 0;
+
+	/* check for CAP_SYS_RAWIO */
+	cap_header->pid = getpid();
+	cap_header->version = _LINUX_CAPABILITY_VERSION;
+	if (capget(cap_header, cap_data) < 0)
+		err(-6, "capget(2) failed");
+
+	if ((cap_data->effective & (1 << CAP_SYS_RAWIO)) == 0) {
+		do_exit++;
+		warnx("capget(CAP_SYS_RAWIO) failed,"
+			" try \"# setcap cap_sys_rawio=ep %s\"", progname);
+	}
+
+	/* test file permissions */
+	if (euidaccess("/dev/cpu/0/msr", R_OK)) {
+		do_exit++;
+		warn("/dev/cpu/0/msr open failed, try chown or chmod +r /dev/cpu/*/msr");
+	}
+
+	/* if all else fails, thell them to be root */
+	if (do_exit)
+		if (getuid() != 0)
+			warnx("... or simply run as root");
+
+	if (do_exit)
+		exit(-6);
 }
 
-int has_nehalem_turbo_ratio_limit(unsigned int family, unsigned int model)
+/*
+ * NHM adds support for additional MSRs:
+ *
+ * MSR_SMI_COUNT                   0x00000034
+ *
+ * MSR_NHM_PLATFORM_INFO           0x000000ce
+ * MSR_NHM_SNB_PKG_CST_CFG_CTL     0x000000e2
+ *
+ * MSR_PKG_C3_RESIDENCY            0x000003f8
+ * MSR_PKG_C6_RESIDENCY            0x000003f9
+ * MSR_CORE_C3_RESIDENCY           0x000003fc
+ * MSR_CORE_C6_RESIDENCY           0x000003fd
+ *
+ */
+int has_nhm_msrs(unsigned int family, unsigned int model)
 {
 	if (!genuine_intel)
 		return 0;
···
 	case 0x3D:	/* BDW */
 	case 0x4F:	/* BDX */
 	case 0x56:	/* BDX-DE */
-		return 1;
 	case 0x2E:	/* Nehalem-EX Xeon - Beckton */
 	case 0x2F:	/* Westmere-EX Xeon - Eagleton */
+		return 1;
 	default:
 		return 0;
+	}
+}
+int has_nhm_turbo_ratio_limit(unsigned int family, unsigned int model)
+{
+	if (!has_nhm_msrs(family, model))
+		return 0;
+
+	switch (model) {
+	/* Nehalem compatible, but do not include turbo-ratio limit support */
+	case 0x2E:	/* Nehalem-EX Xeon - Beckton */
+	case 0x2F:	/* Westmere-EX Xeon - Eagleton */
+		return 0;
+	default:
+		return 1;
 	}
 }
 int has_ivt_turbo_ratio_limit(unsigned int family, unsigned int model)
···
 	}
 	fprintf(stderr, "cpu%d: MSR_IA32_ENERGY_PERF_BIAS: 0x%08llx (%s)\n", cpu, msr, epb_string);
 
+	return 0;
+}
+
+/*
+ * print_perf_limit()
+ */
+int print_perf_limit(struct thread_data *t, struct core_data *c, struct pkg_data *p)
+{
+	unsigned long long msr;
+	int cpu;
+
+	cpu = t->cpu_id;
+
+	/* per-package */
+	if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE) || !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
+		return 0;
+
+	if (cpu_migrate(cpu)) {
+		fprintf(stderr, "Could not migrate to CPU %d\n", cpu);
+		return -1;
+	}
+
+	if (do_core_perf_limit_reasons) {
+		get_msr(cpu, MSR_CORE_PERF_LIMIT_REASONS, &msr);
+		fprintf(stderr, "cpu%d: MSR_CORE_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);
+		fprintf(stderr, " (Active: %s%s%s%s%s%s%s%s%s%s%s%s%s%s)",
+			(msr & 1 << 0) ? "PROCHOT, " : "",
+			(msr & 1 << 1) ? "ThermStatus, " : "",
+			(msr & 1 << 2) ? "bit2, " : "",
+			(msr & 1 << 4) ? "Graphics, " : "",
+			(msr & 1 << 5) ? "Auto-HWP, " : "",
+			(msr & 1 << 6) ? "VR-Therm, " : "",
+			(msr & 1 << 8) ? "Amps, " : "",
+			(msr & 1 << 9) ? "CorePwr, " : "",
+			(msr & 1 << 10) ? "PkgPwrL1, " : "",
+			(msr & 1 << 11) ? "PkgPwrL2, " : "",
+			(msr & 1 << 12) ? "MultiCoreTurbo, " : "",
+			(msr & 1 << 13) ? "Transitions, " : "",
+			(msr & 1 << 14) ? "bit14, " : "",
+			(msr & 1 << 15) ? "bit15, " : "");
+		fprintf(stderr, " (Logged: %s%s%s%s%s%s%s%s%s%s%s%s%s%s)\n",
+			(msr & 1 << 16) ? "PROCHOT, " : "",
+			(msr & 1 << 17) ? "ThermStatus, " : "",
+			(msr & 1 << 18) ? "bit18, " : "",
+			(msr & 1 << 20) ? "Graphics, " : "",
+			(msr & 1 << 21) ? "Auto-HWP, " : "",
+			(msr & 1 << 22) ? "VR-Therm, " : "",
+			(msr & 1 << 24) ? "Amps, " : "",
+			(msr & 1 << 25) ? "CorePwr, " : "",
+			(msr & 1 << 26) ? "PkgPwrL1, " : "",
+			(msr & 1 << 27) ? "PkgPwrL2, " : "",
+			(msr & 1 << 28) ? "MultiCoreTurbo, " : "",
+			(msr & 1 << 29) ? "Transitions, " : "",
+			(msr & 1 << 30) ? "bit30, " : "",
+			(msr & 1 << 31) ? "bit31, " : "");
+
+	}
+	if (do_gfx_perf_limit_reasons) {
+		get_msr(cpu, MSR_GFX_PERF_LIMIT_REASONS, &msr);
+		fprintf(stderr, "cpu%d: MSR_GFX_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);
+		fprintf(stderr, " (Active: %s%s%s%s%s%s%s%s)",
+			(msr & 1 << 0) ? "PROCHOT, " : "",
+			(msr & 1 << 1) ? "ThermStatus, " : "",
+			(msr & 1 << 4) ? "Graphics, " : "",
+			(msr & 1 << 6) ? "VR-Therm, " : "",
+			(msr & 1 << 8) ? "Amps, " : "",
+			(msr & 1 << 9) ? "GFXPwr, " : "",
+			(msr & 1 << 10) ? "PkgPwrL1, " : "",
+			(msr & 1 << 11) ? "PkgPwrL2, " : "");
+		fprintf(stderr, " (Logged: %s%s%s%s%s%s%s%s)\n",
+			(msr & 1 << 16) ? "PROCHOT, " : "",
+			(msr & 1 << 17) ? "ThermStatus, " : "",
+			(msr & 1 << 20) ? "Graphics, " : "",
+			(msr & 1 << 22) ? "VR-Therm, " : "",
+			(msr & 1 << 24) ? "Amps, " : "",
+			(msr & 1 << 25) ? "GFXPwr, " : "",
+			(msr & 1 << 26) ? "PkgPwrL1, " : "",
+			(msr & 1 << 27) ? "PkgPwrL2, " : "");
+	}
+	if (do_ring_perf_limit_reasons) {
+		get_msr(cpu, MSR_RING_PERF_LIMIT_REASONS, &msr);
+		fprintf(stderr, "cpu%d: MSR_RING_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);
+		fprintf(stderr, " (Active: %s%s%s%s%s%s)",
+			(msr & 1 << 0) ? "PROCHOT, " : "",
+			(msr & 1 << 1) ? "ThermStatus, " : "",
+			(msr & 1 << 6) ? "VR-Therm, " : "",
+			(msr & 1 << 8) ? "Amps, " : "",
+			(msr & 1 << 10) ? "PkgPwrL1, " : "",
+			(msr & 1 << 11) ? "PkgPwrL2, " : "");
+		fprintf(stderr, " (Logged: %s%s%s%s%s%s)\n",
+			(msr & 1 << 16) ? "PROCHOT, " : "",
+			(msr & 1 << 17) ? "ThermStatus, " : "",
+			(msr & 1 << 22) ? "VR-Therm, " : "",
+			(msr & 1 << 24) ? "Amps, " : "",
+			(msr & 1 << 26) ? "PkgPwrL1, " : "",
+			(msr & 1 << 27) ? "PkgPwrL2, " : "");
+	}
 	return 0;
 }
 
···
 		fprintf(stderr, "RAPL: %.0f sec. Joule Counter Range, at %.0f Watts\n", rapl_joule_counter_range, tdp);
 
 	return;
+}
+
+void perf_limit_reasons_probe(family, model)
+{
+	if (!genuine_intel)
+		return;
+
+	if (family != 6)
+		return;
+
+	switch (model) {
+	case 0x3C:	/* HSW */
+	case 0x45:	/* HSW */
+	case 0x46:	/* HSW */
+		do_gfx_perf_limit_reasons = 1;
+	case 0x3F:	/* HSX */
+		do_core_perf_limit_reasons = 1;
+		do_ring_perf_limit_reasons = 1;
+	default:
+		return;
+	}
 }
 
 int print_thermal(struct thread_data *t, struct core_data *c, struct pkg_data *p)
···
 	return 0;
 }
 
+/*
+ * SNB adds support for additional MSRs:
+ *
+ * MSR_PKG_C7_RESIDENCY            0x000003fa
+ * MSR_CORE_C7_RESIDENCY           0x000003fe
+ * MSR_PKG_C2_RESIDENCY            0x0000060d
+ */
 
-int is_snb(unsigned int family, unsigned int model)
+int has_snb_msrs(unsigned int family, unsigned int model)
 {
 	if (!genuine_intel)
 		return 0;
···
 	return 0;
 }
 
-int has_c8_c9_c10(unsigned int family, unsigned int model)
+/*
+ * HSW adds support for additional MSRs:
+ *
+ * MSR_PKG_C8_RESIDENCY            0x00000630
+ * MSR_PKG_C9_RESIDENCY            0x00000631
+ * MSR_PKG_C10_RESIDENCY           0x00000632
+ */
+int has_hsw_msrs(unsigned int family, unsigned int model)
 {
 	if (!genuine_intel)
 		return 0;
···
 
 double discover_bclk(unsigned int family, unsigned int model)
 {
-	if (is_snb(family, model))
+	if (has_snb_msrs(family, model))
 		return 100.00;
 	else if (is_slm(family, model))
 		return slm_bclk();
···
 	}
 
 	/* Temperature Target MSR is Nehalem and newer only */
-	if (!do_nehalem_platform_info)
+	if (!do_nhm_platform_info)
 		goto guess;
 
 	if (get_msr(0, MSR_IA32_TEMPERATURE_TARGET, &msr))
···
 	ebx = ecx = edx = 0;
 	__get_cpuid(0x80000000, &max_level, &ebx, &ecx, &edx);
 
-	if (max_level < 0x80000007)
-		errx(1, "CPUID: no invariant TSC (max_level 0x%x)", max_level);
+	if (max_level >= 0x80000007) {
 
-	/*
-	 * Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8
-	 * this check is valid for both Intel and AMD
-	 */
-	__get_cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
-	has_invariant_tsc = edx & (1 << 8);
-
-	if (!has_invariant_tsc)
-		errx(1, "No invariant TSC");
+		/*
+		 * Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8
+		 * this check is valid for both Intel and AMD
+		 */
+		__get_cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
+		has_invariant_tsc = edx & (1 << 8);
+	}
 
 	/*
 	 * APERF/MPERF is advertised by CPUID.EAX=0x6: ECX.bit0
···
 	has_epb = ecx & (1 << 3);
 
 	if (verbose)
-		fprintf(stderr, "CPUID(6): %s%s%s%s\n",
-			has_aperf ? "APERF" : "No APERF!",
-			do_dts ? ", DTS" : "",
-			do_ptm ? ", PTM": "",
-			has_epb ? ", EPB": "");
+		fprintf(stderr, "CPUID(6): %sAPERF, %sDTS, %sPTM, %sEPB\n",
+			has_aperf ? "" : "No ",
+			do_dts ? "" : "No ",
+			do_ptm ? "" : "No ",
+			has_epb ? "" : "No ");
 
-	if (!has_aperf)
-		errx(-1, "No APERF");
-
-	do_nehalem_platform_info = genuine_intel && has_invariant_tsc;
-	do_nhm_cstates = genuine_intel;	/* all Intel w/ non-stop TSC have NHM counters */
-	do_smi = do_nhm_cstates;
-	do_snb_cstates = is_snb(family, model);
-	do_c8_c9_c10 = has_c8_c9_c10(family, model);
+	do_nhm_platform_info = do_nhm_cstates = do_smi = has_nhm_msrs(family, model);
+	do_snb_cstates = has_snb_msrs(family, model);
+	do_c8_c9_c10 = has_hsw_msrs(family, model);
 	do_slm_cstates = is_slm(family, model);
 	bclk = discover_bclk(family, model);
 
-	do_nehalem_turbo_ratio_limit = has_nehalem_turbo_ratio_limit(family, model);
+	do_nhm_turbo_ratio_limit = has_nhm_turbo_ratio_limit(family, model);
 	do_ivt_turbo_ratio_limit = has_ivt_turbo_ratio_limit(family, model);
 	rapl_probe(family, model);
+	perf_limit_reasons_probe(family, model);
 
 	return;
 }
···
 
 void turbostat_init()
 {
-	check_cpuid();
-
 	check_dev_msr();
-	check_super_user();
+	check_permissions();
+	check_cpuid();
 
 	setup_all_buffers();
 
···
 
 	if (verbose)
 		for_all_cpus(print_epb, ODD_COUNTERS);
+
+	if (verbose)
+		for_all_cpus(print_perf_limit, ODD_COUNTERS);
 
 	if (verbose)
 		for_all_cpus(print_rapl, ODD_COUNTERS);
···
 	cmdline(argc, argv);
 
 	if (verbose)
-		fprintf(stderr, "turbostat v3.7 Feb 6, 2014"
+		fprintf(stderr, "turbostat v3.9 23-Jan, 2015"
 			" - Len Brown <[e-mail]>\n");
 
 	turbostat_init();