Merge tag 'rtc-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC updates from Alexandre Belloni:
"The isl1208 dirver was reworked tobe able to work as part of an MFD.

All the Loongson chips are now supported through a new driver, the old
one is removed.

Summary:

Subsystem:
- Switch i2c drivers back to use .probe()
- Constify pointers to hwmon_channel_info

New driver:
- Loongson on chip RTC, replacing the Loongson 1 only driver

Drivers:
- isl1208: cleanup and support for RAA215300
- st-lpc: cleanups
- stm32: fix wakeup"

* tag 'rtc-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (21 commits)
rtc: Add rtc driver for the Loongson family chips
rtc: Remove the Loongson-1 RTC driver
dt-bindings: rtc: Split loongson,ls2x-rtc into SoC-based compatibles
rtc: rv3028: make rv3028 probeable from userspace
rtc: isl1208: Add support for the built-in RTC on the PMIC RAA215300
rtc: isl1208: Add isl1208_set_xtoscb()
rtc: isl1208: Drop enum isl1208_id and split isl1208_configs[]
rtc: isl1208: Make similar I2C and DT-based matching table
rtc: isl1208: Drop name variable
dt-bindings: rtc: isil,isl1208: Document clock and clock-names properties
dt-bindings: rtc: isl1208: Convert to json-schema
rtc: st-lpc: Simplify clk handling in st_rtc_probe()
rtc: st-lpc: Release some resources in st_rtc_probe() in case of error
rtc: stm32: remove dedicated wakeup management
dt-bindings: rtc: restrict node name suffixes
rtc: add HAS_IOPORT dependencies
rtc: Switch i2c drivers back to use .probe()
rtc: rv3032: constify pointers to hwmon_channel_info
rtc: isl12022: constify pointers to hwmon_channel_info
rtc: ds3232: constify pointers to hwmon_channel_info
...

Documentation/devicetree/bindings/rtc/isil,isl1208.txt

···
-Intersil ISL1209/19 I2C RTC/Alarm chip with event in
-
-ISL12X9 have additional pins EVIN and #EVDET for tamper detection, while the
-ISL1208 and ISL1218 do not.  They are all use the same driver with the bindings
-described here, with chip specific properties as noted.
-
-Required properties supported by the device:
- - "compatible": Should be one of the following:
-		- "isil,isl1208"
-		- "isil,isl1209"
-		- "isil,isl1218"
-		- "isil,isl1219"
- - "reg": I2C bus address of the device
-
-Optional properties:
- - "interrupt-names": list which may contains "irq" and "evdet"
-	evdet applies to isl1209 and isl1219 only
- - "interrupts": list of interrupts for "irq" and "evdet"
-	evdet applies to isl1209 and isl1219 only
- - "isil,ev-evienb": Enable or disable internal pull on EVIN pin
-	Applies to isl1209 and isl1219 only
-	Possible values are 0 and 1
-	Value 0 enables internal pull-up on evin pin, 1 disables it.
-	Default will leave the non-volatile configuration of the pullup
-	as is.
-
-Example isl1219 node with #IRQ pin connected to SoC gpio1 pin12 and #EVDET pin
-connected to SoC gpio2 pin 24 and internal pull-up enabled in EVIN pin.
-
-	isl1219: rtc@68 {
-		compatible = "isil,isl1219";
-		reg = <0x68>;
-		interrupt-names = "irq", "evdet";
-		interrupts-extended = <&gpio1 12 IRQ_TYPE_EDGE_FALLING>,
-			<&gpio2 24 IRQ_TYPE_EDGE_FALLING>;
-		isil,ev-evienb = <1>;
-	};
-

Documentation/devicetree/bindings/rtc/isil,isl1208.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/isil,isl1208.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intersil ISL1209/19 I2C RTC/Alarm chip with event in
+
+maintainers:
+  - Biju Das <[e-mail]>
+  - Trent Piepho <[e-mail]>
+
+description:
+  ISL12X9 have additional pins EVIN and EVDET for tamper detection, while the
+  ISL1208 and ISL1218 do not.
+
+properties:
+  compatible:
+    enum:
+      - isil,isl1208
+      - isil,isl1209
+      - isil,isl1218
+      - isil,isl1219
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    description: |
+      Use xin, if connected to an external crystal.
+      Use clkin, if connected to an external clock signal.
+    enum:
+      - xin
+      - clkin
+
+  interrupts:
+    minItems: 1
+    maxItems: 2
+
+  interrupt-names:
+    minItems: 1
+    items:
+      - const: irq
+      - const: evdet
+
+  isil,ev-evienb:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    description: |
+      Enable or disable internal pull on EVIN pin
+      Default will leave the non-volatile configuration of the pullup
+      as is.
+        <0> : Enables internal pull-up on evin pin
+        <1> : Disables internal pull-up on evin pin
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: rtc.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - isil,isl1209
+              - isil,isl1219
+    then:
+      properties:
+        interrupts:
+          maxItems: 2
+        interrupt-names:
+          items:
+            - const: irq
+            - const: evdet
+    else:
+      properties:
+        interrupts:
+          maxItems: 1
+        interrupt-names:
+          items:
+            - const: irq
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc_twi: rtc@6f {
+            compatible = "isil,isl1208";
+            reg = <0x6f>;
+        };
+    };

Documentation/devicetree/bindings/rtc/loongson,rtc.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/loongson,rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson Real-Time Clock
+
+description:
+  The Loongson family chips use an on-chip counter 0 (Time Of Year
+  counter) as the RTC.
+
+maintainers:
+  - Binbin Zhou <[e-mail]>
+
+allOf:
+  - $ref: rtc.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - loongson,ls1b-rtc
+          - loongson,ls1c-rtc
+          - loongson,ls7a-rtc
+          - loongson,ls2k1000-rtc
+      - items:
+          - enum:
+              - loongson,ls2k2000-rtc
+              - loongson,ls2k0500-rtc
+          - const: loongson,ls7a-rtc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    rtc@1fe27800 {
+        compatible = "loongson,ls2k1000-rtc";
+        reg = <0x1fe27800 0x100>;
+
+        interrupt-parent = <&liointc1>;
+        interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
+    };
+
+...

Documentation/devicetree/bindings/rtc/rtc.yaml

···
 
 properties:
   $nodename:
-    pattern: "^rtc(@.*|-[0-9a-f])*$"
+    pattern: "^rtc(@.*|-([0-9]|[1-9][0-9]+))?$"
 
   aux-voltage-chargeable:
     $ref: /schemas/types.yaml#/definitions/uint32

Documentation/devicetree/bindings/rtc/trivial-rtc.yaml

···
       - isil,isl1218
       # Intersil ISL12022 Real-time Clock
       - isil,isl12022
-      # Loongson-2K Socs/LS7A bridge Real-time Clock
-      - loongson,ls2x-rtc
       # Real Time Clock Module with I2C-Bus
       - microcrystal,rv3029
       # Real Time Clock

drivers/rtc/Kconfig

···
 config RTC_DRV_CMOS
 	tristate "PC-style 'CMOS'"
 	depends on X86 || ARM || PPC || MIPS || SPARC64
+	depends on HAS_IOPORT || MACH_DECSTATION
 	default y if X86
 	select RTC_MC146818_LIB
 	help
···
 config RTC_DRV_ALPHA
 	bool "Alpha PC-style CMOS"
 	depends on ALPHA
+	depends on HAS_IOPORT
 	select RTC_MC146818_LIB
 	default y
 	help
···
 
 config RTC_DRV_BQ4802
 	tristate "TI BQ4802"
-	depends on HAS_IOMEM
+	depends on HAS_IOMEM && HAS_IOPORT
 	help
 	  If you say Y here you will get support for the TI
 	  BQ4802 RTC chip.
···
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-jz4740.
 
+config RTC_DRV_LOONGSON
+	tristate "Loongson On-chip RTC"
+	depends on MACH_LOONGSON32 || MACH_LOONGSON64 || COMPILE_TEST
+	select REGMAP_MMIO
+	help
+	  This is a driver for the Loongson on-chip Counter0 (Time-Of-Year
+	  counter) to be used as a RTC.
+	  It can be found on Loongson-1 series cpu, Loongson-2K series cpu
+	  and Loongson LS7A bridge chips.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-loongson.
+
 config RTC_DRV_LPC24XX
 	tristate "NXP RTC for LPC178x/18xx/408x/43xx"
 	depends on ARCH_LPC18XX || COMPILE_TEST
···
 
 	  This drive can also be built as a module. If so, the module
 	  will be called rtc-tegra.
-
-config RTC_DRV_LOONGSON1
-	tristate "loongson1 RTC support"
-	depends on MACH_LOONGSON32
-	help
-	  This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
-	  counter) to be used as a RTC.
-
-	  This driver can also be built as a module. If so, the module
-	  will be called rtc-ls1x.
 
 config RTC_DRV_MXC
 	tristate "Freescale MXC Real Time Clock"

drivers/rtc/Makefile

···
 obj-$(CONFIG_RTC_DRV_ISL12026)	+= rtc-isl12026.o
 obj-$(CONFIG_RTC_DRV_ISL1208)	+= rtc-isl1208.o
 obj-$(CONFIG_RTC_DRV_JZ4740)	+= rtc-jz4740.o
-obj-$(CONFIG_RTC_DRV_LOONGSON1)	+= rtc-ls1x.o
+obj-$(CONFIG_RTC_DRV_LOONGSON)	+= rtc-loongson.o
 obj-$(CONFIG_RTC_DRV_LP8788)	+= rtc-lp8788.o
 obj-$(CONFIG_RTC_DRV_LPC24XX)	+= rtc-lpc24xx.o
 obj-$(CONFIG_RTC_DRV_LPC32XX)	+= rtc-lpc32xx.o

drivers/rtc/rtc-ab-b5ze-s3.c

···
 		.pm = &abb5zes3_rtc_pm_ops,
 		.of_match_table = of_match_ptr(abb5zes3_dt_match),
 	},
-	.probe_new = abb5zes3_probe,
+	.probe = abb5zes3_probe,
 	.id_table = abb5zes3_id,
 };
 module_i2c_driver(abb5zes3_driver);

drivers/rtc/rtc-ab-eoz9.c

···
 	.config = abeoz9_temp_config,
 };
 
-static const struct hwmon_channel_info *abeoz9_info[] = {
+static const struct hwmon_channel_info * const abeoz9_info[] = {
 	&abeoz9_chip,
 	&abeoz9_temp,
 	NULL
···
 		.name = "rtc-ab-eoz9",
 		.of_match_table = of_match_ptr(abeoz9_dt_match),
 	},
-	.probe_new = abeoz9_probe,
+	.probe = abeoz9_probe,
 	.id_table = abeoz9_id,
 };
 

drivers/rtc/rtc-abx80x.c

···
 		.name	= "rtc-abx80x",
 		.of_match_table = of_match_ptr(abx80x_of_match),
 	},
-	.probe_new	= abx80x_probe,
+	.probe		= abx80x_probe,
 	.id_table	= abx80x_id,
 };
 

drivers/rtc/rtc-bq32k.c

···
 		.name	= "bq32k",
 		.of_match_table = of_match_ptr(bq32k_of_match),
 	},
-	.probe_new	= bq32k_probe,
+	.probe		= bq32k_probe,
 	.remove		= bq32k_remove,
 	.id_table	= bq32k_id,
 };

drivers/rtc/rtc-ds1307.c

···
 		.name	= "rtc-ds1307",
 		.of_match_table = ds1307_of_match,
 	},
-	.probe_new	= ds1307_probe,
+	.probe		= ds1307_probe,
 	.id_table	= ds1307_id,
 };
 

drivers/rtc/rtc-ds1374.c

···
 		.of_match_table = of_match_ptr(ds1374_of_match),
 		.pm = &ds1374_pm,
 	},
-	.probe_new = ds1374_probe,
+	.probe = ds1374_probe,
 	.remove = ds1374_remove,
 	.id_table = ds1374_id,
 };

drivers/rtc/rtc-ds1672.c

···
 		   .name = "rtc-ds1672",
 		   .of_match_table = of_match_ptr(ds1672_of_match),
 	},
-	.probe_new = ds1672_probe,
+	.probe = ds1672_probe,
 	.id_table = ds1672_id,
 };
 

drivers/rtc/rtc-ds3232.c

···
 	.config = ds3232_hwmon_temp_config,
 };
 
-static const struct hwmon_channel_info *ds3232_hwmon_info[] = {
+static const struct hwmon_channel_info * const ds3232_hwmon_info[] = {
 	&ds3232_hwmon_chip,
 	&ds3232_hwmon_temp,
 	NULL
···
 		.of_match_table = of_match_ptr(ds3232_of_match),
 		.pm	= &ds3232_pm_ops,
 	},
-	.probe_new = ds3232_i2c_probe,
+	.probe = ds3232_i2c_probe,
 	.id_table = ds3232_id,
 };
 

drivers/rtc/rtc-em3027.c

···
 		   .name = "rtc-em3027",
 		   .of_match_table = of_match_ptr(em3027_of_match),
 	},
-	.probe_new = em3027_probe,
+	.probe = em3027_probe,
 	.id_table = em3027_id,
 };
 

drivers/rtc/rtc-fm3130.c

···
 	.driver = {
 		.name	= "rtc-fm3130",
 	},
-	.probe_new	= fm3130_probe,
+	.probe		= fm3130_probe,
 	.id_table	= fm3130_id,
 };
 

drivers/rtc/rtc-hym8563.c

···
 		.pm	= &hym8563_pm_ops,
 		.of_match_table	= hym8563_dt_idtable,
 	},
-	.probe_new	= hym8563_probe,
+	.probe		= hym8563_probe,
 	.id_table	= hym8563_id,
 };
 

drivers/rtc/rtc-isl12022.c

···
 	return -EOPNOTSUPP;
 }
 
-static const struct hwmon_channel_info *isl12022_hwmon_info[] = {
+static const struct hwmon_channel_info * const isl12022_hwmon_info[] = {
 	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
 	NULL
 };
···
 		.name	= "rtc-isl12022",
 		.of_match_table = isl12022_dt_match,
 	},
-	.probe_new	= isl12022_probe,
+	.probe		= isl12022_probe,
 	.id_table	= isl12022_id,
 };
 

drivers/rtc/rtc-isl12026.c

···
 		.name	= "rtc-isl12026",
 		.of_match_table = isl12026_dt_match,
 	},
-	.probe_new	= isl12026_probe_new,
+	.probe		= isl12026_probe_new,
 	.remove		= isl12026_remove,
 };
 

drivers/rtc/rtc-isl1208.c

···
  */
 
 #include <linux/bcd.h>
+#include <linux/clk.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
···
 
 static struct i2c_driver isl1208_driver;
 
-/* ISL1208 various variants */
-enum isl1208_id {
-	TYPE_ISL1208 = 0,
-	TYPE_ISL1209,
-	TYPE_ISL1218,
-	TYPE_ISL1219,
-	ISL_LAST_ID
-};
-
 /* Chip capabilities table */
-static const struct isl1208_config {
-	const char	name[8];
+struct isl1208_config {
 	unsigned int	nvmem_length;
 	unsigned	has_tamper:1;
 	unsigned	has_timestamp:1;
-} isl1208_configs[] = {
-	[TYPE_ISL1208] = { "isl1208", 2, false, false },
-	[TYPE_ISL1209] = { "isl1209", 2, true,  false },
-	[TYPE_ISL1218] = { "isl1218", 8, false, false },
-	[TYPE_ISL1219] = { "isl1219", 2, true,  true },
+	unsigned	has_inverted_osc_bit:1;
+};
+
+static const struct isl1208_config config_isl1208 = {
+	.nvmem_length = 2,
+	.has_tamper = false,
+	.has_timestamp = false
+};
+
+static const struct isl1208_config config_isl1209 = {
+	.nvmem_length = 2,
+	.has_tamper = true,
+	.has_timestamp = false
+};
+
+static const struct isl1208_config config_isl1218 = {
+	.nvmem_length = 8,
+	.has_tamper = false,
+	.has_timestamp = false
+};
+
+static const struct isl1208_config config_isl1219 = {
+	.nvmem_length = 2,
+	.has_tamper = true,
+	.has_timestamp = true
+};
+
+static const struct isl1208_config config_raa215300_a0 = {
+	.nvmem_length = 2,
+	.has_tamper = false,
+	.has_timestamp = false,
+	.has_inverted_osc_bit = true
 };
 
 static const struct i2c_device_id isl1208_id[] = {
-	{ "isl1208", TYPE_ISL1208 },
-	{ "isl1209", TYPE_ISL1209 },
-	{ "isl1218", TYPE_ISL1218 },
-	{ "isl1219", TYPE_ISL1219 },
+	{ "isl1208", .driver_data = (kernel_ulong_t)&config_isl1208 },
+	{ "isl1209", .driver_data = (kernel_ulong_t)&config_isl1209 },
+	{ "isl1218", .driver_data = (kernel_ulong_t)&config_isl1218 },
+	{ "isl1219", .driver_data = (kernel_ulong_t)&config_isl1219 },
+	{ "raa215300_a0", .driver_data = (kernel_ulong_t)&config_raa215300_a0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, isl1208_id);
 
 static const __maybe_unused struct of_device_id isl1208_of_match[] = {
-	{ .compatible = "isil,isl1208", .data = &isl1208_configs[TYPE_ISL1208] },
-	{ .compatible = "isil,isl1209", .data = &isl1208_configs[TYPE_ISL1209] },
-	{ .compatible = "isil,isl1218", .data = &isl1208_configs[TYPE_ISL1218] },
-	{ .compatible = "isil,isl1219", .data = &isl1208_configs[TYPE_ISL1219] },
+	{ .compatible = "isil,isl1208", .data = &config_isl1208 },
+	{ .compatible = "isil,isl1209", .data = &config_isl1209 },
+	{ .compatible = "isil,isl1218", .data = &config_isl1218 },
+	{ .compatible = "isil,isl1219", .data = &config_isl1219 },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, isl1208_of_match);
···
 	}
 
 	return 0;
+}
+
+static int isl1208_set_xtoscb(struct i2c_client *client, int sr, int xtosb_val)
+{
+	/* Do nothing if bit is already set to desired value */
+	if ((sr & ISL1208_REG_SR_XTOSCB) == xtosb_val)
+		return 0;
+
+	if (xtosb_val)
+		sr |= ISL1208_REG_SR_XTOSCB;
+	else
+		sr &= ~ISL1208_REG_SR_XTOSCB;
+
+	return i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr);
 }
 
 static int
···
 	return 0;
 }
 
-
 static int
 isl1208_rtc_set_time(struct device *dev, struct rtc_time *tm)
 {
···
 }
 
 static int
+isl1208_clk_present(struct i2c_client *client, const char *name)
+{
+	struct clk *clk;
+
+	clk = devm_clk_get_optional(&client->dev, name);
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	return !!clk;
+}
+
+static int
 isl1208_probe(struct i2c_client *client)
 {
-	int rc = 0;
 	struct isl1208_state *isl1208;
 	int evdet_irq = -1;
+	int xtosb_val = 0;
+	int rc = 0;
+	int sr;
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
 		return -ENODEV;
···
 	} else {
 		const struct i2c_device_id *id = i2c_match_id(isl1208_id, client);
 
-		if (id->driver_data >= ISL_LAST_ID)
+		if (!id)
 			return -ENODEV;
-		isl1208->config = &isl1208_configs[id->driver_data];
+		isl1208->config = (struct isl1208_config *)id->driver_data;
+	}
+
+	rc = isl1208_clk_present(client, "xin");
+	if (rc < 0)
+		return rc;
+
+	if (!rc) {
+		rc = isl1208_clk_present(client, "clkin");
+		if (rc < 0)
+			return rc;
+
+		if (rc)
+			xtosb_val = 1;
 	}
 
 	isl1208->rtc = devm_rtc_allocate_device(&client->dev);
···
 	isl1208->nvmem_config.size = isl1208->config->nvmem_length;
 	isl1208->nvmem_config.priv = isl1208;
 
-	rc = isl1208_i2c_get_sr(client);
-	if (rc < 0) {
+	sr = isl1208_i2c_get_sr(client);
+	if (sr < 0) {
 		dev_err(&client->dev, "reading status failed\n");
-		return rc;
+		return sr;
 	}
 
-	if (rc & ISL1208_REG_SR_RTCF)
+	if (isl1208->config->has_inverted_osc_bit)
+		xtosb_val = !xtosb_val;
+
+	rc = isl1208_set_xtoscb(client, sr, xtosb_val);
+	if (rc)
+		return rc;
+
+	if (sr & ISL1208_REG_SR_RTCF)
 		dev_warn(&client->dev, "rtc power failure detected, "
 			 "please set clock.\n");
 
···
 		.name = "rtc-isl1208",
 		.of_match_table = of_match_ptr(isl1208_of_match),
 	},
-	.probe_new = isl1208_probe,
+	.probe = isl1208_probe,
 	.id_table = isl1208_id,
 };
 

drivers/rtc/rtc-loongson.c

···
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Loongson RTC driver
+ *
+ * Maintained out-of-tree by Huacai Chen <[e-mail]>.
+ * Rewritten for mainline by WANG Xuerui <[e-mail]>.
+ *                           Binbin Zhou <[e-mail]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/rtc.h>
+#include <linux/acpi.h>
+
+/* Time Of Year(TOY) counters registers */
+#define TOY_TRIM_REG		0x20 /* Must be initialized to 0 */
+#define TOY_WRITE0_REG		0x24 /* TOY low 32-bits value (write-only) */
+#define TOY_WRITE1_REG		0x28 /* TOY high 32-bits value (write-only) */
+#define TOY_READ0_REG		0x2c /* TOY low 32-bits value (read-only) */
+#define TOY_READ1_REG		0x30 /* TOY high 32-bits value (read-only) */
+#define TOY_MATCH0_REG		0x34 /* TOY timing interrupt 0 */
+#define TOY_MATCH1_REG		0x38 /* TOY timing interrupt 1 */
+#define TOY_MATCH2_REG		0x3c /* TOY timing interrupt 2 */
+
+/* RTC counters registers */
+#define RTC_CTRL_REG		0x40 /* TOY and RTC control register */
+#define RTC_TRIM_REG		0x60 /* Must be initialized to 0 */
+#define RTC_WRITE0_REG		0x64 /* RTC counters value (write-only) */
+#define RTC_READ0_REG		0x68 /* RTC counters value (read-only) */
+#define RTC_MATCH0_REG		0x6c /* RTC timing interrupt 0 */
+#define RTC_MATCH1_REG		0x70 /* RTC timing interrupt 1 */
+#define RTC_MATCH2_REG		0x74 /* RTC timing interrupt 2 */
+
+/* bitmask of TOY_WRITE0_REG */
+#define TOY_MON			GENMASK(31, 26)
+#define TOY_DAY			GENMASK(25, 21)
+#define TOY_HOUR		GENMASK(20, 16)
+#define TOY_MIN			GENMASK(15, 10)
+#define TOY_SEC			GENMASK(9, 4)
+#define TOY_MSEC		GENMASK(3, 0)
+
+/* bitmask of TOY_MATCH0/1/2_REG */
+#define TOY_MATCH_YEAR		GENMASK(31, 26)
+#define TOY_MATCH_MON		GENMASK(25, 22)
+#define TOY_MATCH_DAY		GENMASK(21, 17)
+#define TOY_MATCH_HOUR		GENMASK(16, 12)
+#define TOY_MATCH_MIN		GENMASK(11, 6)
+#define TOY_MATCH_SEC		GENMASK(5, 0)
+
+/* bitmask of RTC_CTRL_REG */
+#define RTC_ENABLE		BIT(13) /* 1: RTC counters enable */
+#define TOY_ENABLE		BIT(11) /* 1: TOY counters enable */
+#define OSC_ENABLE		BIT(8) /* 1: 32.768k crystal enable */
+#define TOY_ENABLE_MASK		(TOY_ENABLE | OSC_ENABLE)
+
+/* PM domain registers */
+#define PM1_STS_REG		0x0c	/* Power management 1 status register */
+#define RTC_STS			BIT(10)	/* RTC status */
+#define PM1_EN_REG		0x10	/* Power management 1 enable register */
+#define RTC_EN			BIT(10)	/* RTC event enable */
+
+/*
+ * According to the LS1C manual, RTC_CTRL and alarm-related registers are not defined.
+ * Accessing the relevant registers will cause the system to hang.
+ */
+#define LS1C_RTC_CTRL_WORKAROUND	BIT(0)
+
+struct loongson_rtc_config {
+	u32 pm_offset;	/* Offset of PM domain, for RTC alarm wakeup */
+	u32 flags;	/* Workaround bits */
+};
+
+struct loongson_rtc_priv {
+	spinlock_t lock;	/* protects PM registers access */
+	u32 fix_year;		/* RTC alarm year compensation value */
+	struct rtc_device *rtcdev;
+	struct regmap *regmap;
+	void __iomem *pm_base;	/* PM domain base, for RTC alarm wakeup */
+	const struct loongson_rtc_config *config;
+};
+
+static const struct loongson_rtc_config ls1b_rtc_config = {
+	.pm_offset = 0,
+	.flags = 0,
+};
+
+static const struct loongson_rtc_config ls1c_rtc_config = {
+	.pm_offset = 0,
+	.flags = LS1C_RTC_CTRL_WORKAROUND,
+};
+
+static const struct loongson_rtc_config generic_rtc_config = {
+	.pm_offset = 0x100,
+	.flags = 0,
+};
+
+static const struct loongson_rtc_config ls2k1000_rtc_config = {
+	.pm_offset = 0x800,
+	.flags = 0,
+};
+
+static const struct regmap_config loongson_rtc_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+/* RTC alarm irq handler */
+static irqreturn_t loongson_rtc_isr(int irq, void *id)
+{
+	struct loongson_rtc_priv *priv = (struct loongson_rtc_priv *)id;
+
+	rtc_update_irq(priv->rtcdev, 1, RTC_AF | RTC_IRQF);
+	return IRQ_HANDLED;
+}
+
+/* For ACPI fixed event handler */
+static u32 loongson_rtc_handler(void *id)
+{
+	struct loongson_rtc_priv *priv = (struct loongson_rtc_priv *)id;
+
+	spin_lock(&priv->lock);
+	/* Disable RTC alarm wakeup and interrupt */
+	writel(readl(priv->pm_base + PM1_EN_REG) & ~RTC_EN,
+	       priv->pm_base + PM1_EN_REG);
+
+	/* Clear RTC interrupt status */
+	writel(RTC_STS, priv->pm_base + PM1_STS_REG);
+	spin_unlock(&priv->lock);
+
+	/*
+	 * The TOY_MATCH0_REG should be cleared 0 here,
+	 * otherwise the interrupt cannot be cleared.
+	 */
+	return regmap_write(priv->regmap, TOY_MATCH0_REG, 0);
+}
+
+static int loongson_rtc_set_enabled(struct device *dev)
+{
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	if (priv->config->flags & LS1C_RTC_CTRL_WORKAROUND)
+		return 0;
+
+	/* Enable RTC TOY counters and crystal */
+	return regmap_update_bits(priv->regmap, RTC_CTRL_REG, TOY_ENABLE_MASK,
+				  TOY_ENABLE_MASK);
+}
+
+static bool loongson_rtc_get_enabled(struct device *dev)
+{
+	int ret;
+	u32 ctrl_data;
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	if (priv->config->flags & LS1C_RTC_CTRL_WORKAROUND)
+		return true;
+
+	ret = regmap_read(priv->regmap, RTC_CTRL_REG, &ctrl_data);
+	if (ret < 0)
+		return false;
+
+	return ctrl_data & TOY_ENABLE_MASK;
+}
+
+static int loongson_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	int ret;
+	u32 rtc_data[2];
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	if (!loongson_rtc_get_enabled(dev))
+		return -EINVAL;
+
+	ret = regmap_bulk_read(priv->regmap, TOY_READ0_REG, rtc_data,
+			       ARRAY_SIZE(rtc_data));
+	if (ret < 0)
+		return ret;
+
+	tm->tm_sec = FIELD_GET(TOY_SEC, rtc_data[0]);
+	tm->tm_min = FIELD_GET(TOY_MIN, rtc_data[0]);
+	tm->tm_hour = FIELD_GET(TOY_HOUR, rtc_data[0]);
+	tm->tm_mday = FIELD_GET(TOY_DAY, rtc_data[0]);
+	tm->tm_mon = FIELD_GET(TOY_MON, rtc_data[0]) - 1;
+	tm->tm_year = rtc_data[1];
+
+	/* Prepare for RTC alarm year compensation value. */
+	priv->fix_year = tm->tm_year / 64 * 64;
+	return 0;
+}
+
+static int loongson_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	int ret;
+	u32 rtc_data[2];
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	rtc_data[0] = FIELD_PREP(TOY_SEC, tm->tm_sec)
+		    | FIELD_PREP(TOY_MIN, tm->tm_min)
+		    | FIELD_PREP(TOY_HOUR, tm->tm_hour)
+		    | FIELD_PREP(TOY_DAY, tm->tm_mday)
+		    | FIELD_PREP(TOY_MON, tm->tm_mon + 1);
+	rtc_data[1] = tm->tm_year;
+
+	ret = regmap_bulk_write(priv->regmap, TOY_WRITE0_REG, rtc_data,
+				ARRAY_SIZE(rtc_data));
+	if (ret < 0)
+		return ret;
+
+	return loongson_rtc_set_enabled(dev);
+}
+
+static int loongson_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	int ret;
+	u32 alarm_data;
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	ret = regmap_read(priv->regmap, TOY_MATCH0_REG, &alarm_data);
+	if (ret < 0)
+		return ret;
+
+	alrm->time.tm_sec = FIELD_GET(TOY_MATCH_SEC, alarm_data);
+	alrm->time.tm_min = FIELD_GET(TOY_MATCH_MIN, alarm_data);
+	alrm->time.tm_hour = FIELD_GET(TOY_MATCH_HOUR, alarm_data);
+	alrm->time.tm_mday = FIELD_GET(TOY_MATCH_DAY, alarm_data);
+	alrm->time.tm_mon = FIELD_GET(TOY_MATCH_MON, alarm_data) - 1;
+	/*
+	 * This is a hardware bug: the year field of SYS_TOYMATCH is only 6 bits,
+	 * making it impossible to save year values larger than 64.
+	 *
+	 * SYS_TOYMATCH is used to match the alarm time value and determine if
+	 * an alarm is triggered, so we must keep the lower 6 bits of the year
+	 * value constant during the value conversion.
+	 *
+	 * In summary, we need to manually add 64(or a multiple of 64) to the
+	 * year value to avoid the invalid alarm prompt at startup.
+	 */
+	alrm->time.tm_year = FIELD_GET(TOY_MATCH_YEAR, alarm_data) + priv->fix_year;
+
+	alrm->enabled = !!(readl(priv->pm_base + PM1_EN_REG) & RTC_EN);
+	return 0;
+}
+
+static int loongson_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+	u32 val;
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	spin_lock(&priv->lock);
+	val = readl(priv->pm_base + PM1_EN_REG);
+	/* Enable RTC alarm wakeup */
+	writel(enabled ? val | RTC_EN : val & ~RTC_EN,
+	       priv->pm_base + PM1_EN_REG);
+	spin_unlock(&priv->lock);
+
+	return 0;
+}
+
+static int loongson_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	int ret;
+	u32 alarm_data;
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	alarm_data = FIELD_PREP(TOY_MATCH_SEC, alrm->time.tm_sec)
+		   | FIELD_PREP(TOY_MATCH_MIN, alrm->time.tm_min)
+		   | FIELD_PREP(TOY_MATCH_HOUR, alrm->time.tm_hour)
+		   | FIELD_PREP(TOY_MATCH_DAY, alrm->time.tm_mday)
+		   | FIELD_PREP(TOY_MATCH_MON, alrm->time.tm_mon + 1)
+		   | FIELD_PREP(TOY_MATCH_YEAR, alrm->time.tm_year - priv->fix_year);
+
+	ret = regmap_write(priv->regmap, TOY_MATCH0_REG, alarm_data);
+	if (ret < 0)
+		return ret;
+
+	return loongson_rtc_alarm_irq_enable(dev, alrm->enabled);
+}
+
+static const struct rtc_class_ops loongson_rtc_ops = {
+	.read_time = loongson_rtc_read_time,
+	.set_time = loongson_rtc_set_time,
+	.read_alarm = loongson_rtc_read_alarm,
+	.set_alarm = loongson_rtc_set_alarm,
+	.alarm_irq_enable = loongson_rtc_alarm_irq_enable,
+};
+
+static int loongson_rtc_probe(struct platform_device *pdev)
+{
+	int ret, alarm_irq;
+	void __iomem *regs;
+	struct loongson_rtc_priv *priv;
+	struct device *dev = &pdev->dev;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(regs))
+		return dev_err_probe(dev, PTR_ERR(regs),
+				     "devm_platform_ioremap_resource failed\n");
+
+	priv->regmap = devm_regmap_init_mmio(dev, regs,
+					     &loongson_rtc_regmap_config);
+	if (IS_ERR(priv->regmap))
+		return dev_err_probe(dev, PTR_ERR(priv->regmap),
+				     "devm_regmap_init_mmio failed\n");
+
+	priv->config = device_get_match_data(dev);
+	spin_lock_init(&priv->lock);
+	platform_set_drvdata(pdev, priv);
+
+	priv->rtcdev = devm_rtc_allocate_device(dev);
+	if (IS_ERR(priv->rtcdev))
+		return dev_err_probe(dev, PTR_ERR(priv->rtcdev),
+				     "devm_rtc_allocate_device failed\n");
+
+	/* Get RTC alarm irq */
+	alarm_irq = platform_get_irq(pdev, 0);
+	if (alarm_irq > 0) {
+		ret = devm_request_irq(dev, alarm_irq, loongson_rtc_isr,
+				       0, "loongson-alarm", priv);
+		if (ret < 0)
+			return dev_err_probe(dev, ret, "Unable to request irq %d\n",
+					     alarm_irq);
+
+		priv->pm_base = regs - priv->config->pm_offset;
+		device_init_wakeup(dev, 1);
+
+		if (has_acpi_companion(dev))
+			acpi_install_fixed_event_handler(ACPI_EVENT_RTC,
+							 loongson_rtc_handler, priv);
+	} else {
+		/* Loongson-1C RTC does not support alarm */
+		clear_bit(RTC_FEATURE_ALARM, priv->rtcdev->features);
+	}
+
+	/* Loongson RTC does not support UIE */
+	clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, priv->rtcdev->features);
+	priv->rtcdev->ops = &loongson_rtc_ops;
+	priv->rtcdev->range_min = RTC_TIMESTAMP_BEGIN_2000;
+	priv->rtcdev->range_max = RTC_TIMESTAMP_END_2099;
+
+	return devm_rtc_register_device(priv->rtcdev);
+}
+
+static void loongson_rtc_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct loongson_rtc_priv *priv = dev_get_drvdata(dev);
+
+	if (!test_bit(RTC_FEATURE_ALARM, priv->rtcdev->features))
+		return;
+
+	if (has_acpi_companion(dev))
+		acpi_remove_fixed_event_handler(ACPI_EVENT_RTC,
+						loongson_rtc_handler);
+
+	device_init_wakeup(dev, 0);
+	loongson_rtc_alarm_irq_enable(dev, 0);
+}
+
+static const struct of_device_id loongson_rtc_of_match[] = {
+	{ .compatible = "loongson,ls1b-rtc", .data = &ls1b_rtc_config },
+	{ .compatible = "loongson,ls1c-rtc", .data = &ls1c_rtc_config },
+	{ .compatible = "loongson,ls7a-rtc", .data = &generic_rtc_config },
+	{ .compatible = "loongson,ls2k1000-rtc", .data = &ls2k1000_rtc_config },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, loongson_rtc_of_match);
+
+static const struct acpi_device_id loongson_rtc_acpi_match[] = {
+	{ "LOON0001", .driver_data = (kernel_ulong_t)&generic_rtc_config },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, loongson_rtc_acpi_match);
+
+static struct platform_driver loongson_rtc_driver = {
+	.probe		= loongson_rtc_probe,
+	.remove_new	= loongson_rtc_remove,
+	.driver		= {
+		.name	= "loongson-rtc",
+		.of_match_table = loongson_rtc_of_match,
+		.acpi_match_table = loongson_rtc_acpi_match,
+	},
+};
+module_platform_driver(loongson_rtc_driver);
+
+MODULE_DESCRIPTION("Loongson RTC driver");
+MODULE_AUTHOR("Binbin Zhou <[e-mail]>");
+MODULE_AUTHOR("WANG Xuerui <[e-mail]>");
+MODULE_AUTHOR("Huacai Chen <[e-mail]>");
+MODULE_LICENSE("GPL");

drivers/rtc/rtc-ls1x.c

···
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (c) 2011 Zhao Zhang <[e-mail]>
- *
- * Derived from driver/rtc/rtc-au1xxx.c
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/rtc.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/types.h>
-#include <linux/io.h>
-#include <loongson1.h>
-
-#define LS1X_RTC_REG_OFFSET	(LS1X_RTC_BASE + 0x20)
-#define LS1X_RTC_REGS(x) \
-		((void __iomem *)KSEG1ADDR(LS1X_RTC_REG_OFFSET + (x)))
-
-/*RTC programmable counters 0 and 1*/
-#define SYS_COUNTER_CNTRL		(LS1X_RTC_REGS(0x20))
-#define SYS_CNTRL_ERS			(1 << 23)
-#define SYS_CNTRL_RTS			(1 << 20)
-#define SYS_CNTRL_RM2			(1 << 19)
-#define SYS_CNTRL_RM1			(1 << 18)
-#define SYS_CNTRL_RM0			(1 << 17)
-#define SYS_CNTRL_RS			(1 << 16)
-#define SYS_CNTRL_BP			(1 << 14)
-#define SYS_CNTRL_REN			(1 << 13)
-#define SYS_CNTRL_BRT			(1 << 12)
-#define SYS_CNTRL_TEN			(1 << 11)
-#define SYS_CNTRL_BTT			(1 << 10)
-#define SYS_CNTRL_E0			(1 << 8)
-#define SYS_CNTRL_ETS			(1 << 7)
-#define SYS_CNTRL_32S			(1 << 5)
-#define SYS_CNTRL_TTS			(1 << 4)
-#define SYS_CNTRL_TM2			(1 << 3)
-#define SYS_CNTRL_TM1			(1 << 2)
-#define SYS_CNTRL_TM0			(1 << 1)
-#define SYS_CNTRL_TS			(1 << 0)
-
-/* Programmable Counter 0 Registers */
-#define SYS_TOYTRIM		(LS1X_RTC_REGS(0))
-#define SYS_TOYWRITE0		(LS1X_RTC_REGS(4))
-#define SYS_TOYWRITE1		(LS1X_RTC_REGS(8))
-#define SYS_TOYREAD0		(LS1X_RTC_REGS(0xC))
-#define SYS_TOYREAD1		(LS1X_RTC_REGS(0x10))
-#define SYS_TOYMATCH0		(LS1X_RTC_REGS(0x14))
-#define SYS_TOYMATCH1		(LS1X_RTC_REGS(0x18))
-#define SYS_TOYMATCH2		(LS1X_RTC_REGS(0x1C))
-
-/* Programmable Counter 1 Registers */
-#define SYS_RTCTRIM		(LS1X_RTC_REGS(0x40))
-#define SYS_RTCWRITE0		(LS1X_RTC_REGS(0x44))
-#define SYS_RTCREAD0		(LS1X_RTC_REGS(0x48))
-#define SYS_RTCMATCH0		(LS1X_RTC_REGS(0x4C))
-#define SYS_RTCMATCH1		(LS1X_RTC_REGS(0x50))
-#define SYS_RTCMATCH2		(LS1X_RTC_REGS(0x54))
-
-#define LS1X_SEC_OFFSET		(4)
-#define LS1X_MIN_OFFSET		(10)
-#define LS1X_HOUR_OFFSET	(16)
-#define LS1X_DAY_OFFSET		(21)
-#define LS1X_MONTH_OFFSET	(26)
-
-
-#define LS1X_SEC_MASK		(0x3f)
-#define LS1X_MIN_MASK		(0x3f)
-#define LS1X_HOUR_MASK		(0x1f)
-#define LS1X_DAY_MASK		(0x1f)
-#define LS1X_MONTH_MASK		(0x3f)
-#define LS1X_YEAR_MASK		(0xffffffff)
-
-#define ls1x_get_sec(t)		(((t) >> LS1X_SEC_OFFSET) & LS1X_SEC_MASK)
-#define ls1x_get_min(t)		(((t) >> LS1X_MIN_OFFSET) & LS1X_MIN_MASK)
-#define ls1x_get_hour(t)	(((t) >> LS1X_HOUR_OFFSET) & LS1X_HOUR_MASK)
-#define ls1x_get_day(t)		(((t) >> LS1X_DAY_OFFSET) & LS1X_DAY_MASK)
-#define ls1x_get_month(t)	(((t) >> LS1X_MONTH_OFFSET) & LS1X_MONTH_MASK)
-
-#define RTC_CNTR_OK (SYS_CNTRL_E0 | SYS_CNTRL_32S)
-
-static int ls1x_rtc_read_time(struct device *dev, struct rtc_time *rtm)
-{
-	unsigned long v;
-	time64_t t;
-
-	v = readl(SYS_TOYREAD0);
-	t = readl(SYS_TOYREAD1);
-
-	memset(rtm, 0, sizeof(struct rtc_time));
-	t  = mktime64((t & LS1X_YEAR_MASK), ls1x_get_month(v),
-			ls1x_get_day(v), ls1x_get_hour(v),
-			ls1x_get_min(v), ls1x_get_sec(v));
-	rtc_time64_to_tm(t, rtm);
-
-	return 0;
-}
-
-static int ls1x_rtc_set_time(struct device *dev, struct  rtc_time *rtm)
-{
-	unsigned long v, t, c;
-	int ret = -ETIMEDOUT;
-
-	v = ((rtm->tm_mon + 1)  << LS1X_MONTH_OFFSET)
-		| (rtm->tm_mday << LS1X_DAY_OFFSET)
-		| (rtm->tm_hour << LS1X_HOUR_OFFSET)
-		| (rtm->tm_min  << LS1X_MIN_OFFSET)
-		| (rtm->tm_sec  << LS1X_SEC_OFFSET);
-
-	writel(v, SYS_TOYWRITE0);
-	c = 0x10000;
-	/* add timeout check counter, for more safe */
-	while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c)
-		usleep_range(1000, 3000);
-
-	if (!c) {
-		dev_err(dev, "set time timeout!\n");
-		goto err;
-	}
-
-	t = rtm->tm_year + 1900;
-	writel(t, SYS_TOYWRITE1);
-	c = 0x10000;
-	while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c)
-		usleep_range(1000, 3000);
-
-	if (!c) {
-		dev_err(dev, "set time timeout!\n");
-		goto err;
-	}
-	return 0;
-err:
-	return ret;
-}
-
-static const struct rtc_class_ops  ls1x_rtc_ops = {
-	.read_time	= ls1x_rtc_read_time,
-	.set_time	= ls1x_rtc_set_time,
-};
-
-static int ls1x_rtc_probe(struct platform_device *pdev)
-{
-	struct rtc_device *rtcdev;
-	unsigned long v;
-
-	v = readl(SYS_COUNTER_CNTRL);
-	if (!(v & RTC_CNTR_OK)) {
-		dev_err(&pdev->dev, "rtc counters not working\n");
-		return -ENODEV;
-	}
-
-	/* set to 1 HZ if needed */
-	if (readl(SYS_TOYTRIM) != 32767) {
-		v = 0x100000;
-		while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS) && --v)
-			usleep_range(1000, 3000);
-
-		if (!v) {
-			dev_err(&pdev->dev, "time out\n");
-			return -ETIMEDOUT;
-		}
-		writel(32767, SYS_TOYTRIM);
-	}
-	/* this loop coundn't be endless */
-	while (readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS)
-		usleep_range(1000, 3000);
-
-	rtcdev = devm_rtc_allocate_device(&pdev->dev);
-	if (IS_ERR(rtcdev))
-		return PTR_ERR(rtcdev);
-
-	platform_set_drvdata(pdev, rtcdev);
-	rtcdev->ops = &ls1x_rtc_ops;
-	rtcdev->range_min = RTC_TIMESTAMP_BEGIN_1900;
-	rtcdev->range_max = RTC_TIMESTAMP_END_2099;
-
-	return devm_rtc_register_device(rtcdev);
-}
-
-static struct platform_driver  ls1x_rtc_driver = {
-	.driver		= {
-		.name	= "ls1x-rtc",
-	},
-	.probe		= ls1x_rtc_probe,
-};
-
-module_platform_driver(ls1x_rtc_driver);
-
-MODULE_AUTHOR("zhao zhang <[e-mail]>");
-MODULE_LICENSE("GPL");

drivers/rtc/rtc-m41t80.c

···
 		.of_match_table = of_match_ptr(m41t80_of_match),
 		.pm = &m41t80_pm,
 	},
-	.probe_new = m41t80_probe,
+	.probe = m41t80_probe,
 	.remove = m41t80_remove,
 	.id_table = m41t80_id,
 };

drivers/rtc/rtc-max6900.c

···
 	.driver = {
 		   .name = "rtc-max6900",
 		   },
-	.probe_new = max6900_probe,
+	.probe = max6900_probe,
 	.id_table = max6900_id,
 };
 

drivers/rtc/rtc-nct3018y.c

···
 		.name	= "rtc-nct3018y",
 		.of_match_table = of_match_ptr(nct3018y_of_match),
 	},
-	.probe_new	= nct3018y_probe,
+	.probe		= nct3018y_probe,
 	.id_table	= nct3018y_id,
 };
 

drivers/rtc/rtc-pcf2127.c

···
 		.name	= "rtc-pcf2127-i2c",
 		.of_match_table = of_match_ptr(pcf2127_of_match),
 	},
-	.probe_new	= pcf2127_i2c_probe,
+	.probe		= pcf2127_i2c_probe,
 	.id_table	= pcf2127_i2c_id,
 };
 

drivers/rtc/rtc-pcf85063.c

···
 		.name	= "rtc-pcf85063",
 		.of_match_table = of_match_ptr(pcf85063_of_match),
 	},
-	.probe_new	= pcf85063_probe,
+	.probe		= pcf85063_probe,
 	.id_table	= pcf85063_ids,
 };
 

drivers/rtc/rtc-pcf8523.c

···
 		.name = "rtc-pcf8523",
 		.of_match_table = pcf8523_of_match,
 	},
-	.probe_new = pcf8523_probe,
+	.probe = pcf8523_probe,
 	.id_table = pcf8523_id,
 };
 module_i2c_driver(pcf8523_driver);

drivers/rtc/rtc-pcf85363.c

···
 		.name	= "pcf85363",
 		.of_match_table = of_match_ptr(dev_ids),
 	},
-	.probe_new = pcf85363_probe,
+	.probe = pcf85363_probe,
 };
 
 module_i2c_driver(pcf85363_driver);

drivers/rtc/rtc-pcf8563.c

···
 		.name	= "rtc-pcf8563",
 		.of_match_table = of_match_ptr(pcf8563_of_match),
 	},
-	.probe_new	= pcf8563_probe,
+	.probe		= pcf8563_probe,
 	.id_table	= pcf8563_id,
 };
 

drivers/rtc/rtc-pcf8583.c

···
 	.driver = {
 		.name	= "pcf8583",
 	},
-	.probe_new	= pcf8583_probe,
+	.probe		= pcf8583_probe,
 	.id_table	= pcf8583_id,
 };
 

drivers/rtc/rtc-rs5c372.c

···
 		.name	= "rtc-rs5c372",
 		.of_match_table = of_match_ptr(rs5c372_of_match),
 	},
-	.probe_new	= rs5c372_probe,
+	.probe		= rs5c372_probe,
 	.remove		= rs5c372_remove,
 	.id_table	= rs5c372_id,
 };

drivers/rtc/rtc-rv3028.c

···
 };
 MODULE_DEVICE_TABLE(of, rv3028_of_match);
 
+static const struct i2c_device_id rv3028_id_table[] = {
+	{ .name = "rv3028", },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, rv3028_id_table);
+
 static struct i2c_driver rv3028_driver = {
 	.driver = {
 		.name = "rtc-rv3028",
 		.acpi_match_table = rv3028_i2c_acpi_match,
 		.of_match_table = of_match_ptr(rv3028_of_match),
 	},
-	.probe_new	= rv3028_probe,
+	.id_table	= rv3028_id_table,
+	.probe		= rv3028_probe,
 };
 module_i2c_driver(rv3028_driver);
 

drivers/rtc/rtc-rv3029c2.c

···
 		.name = "rv3029",
 		.of_match_table = of_match_ptr(rv3029_of_match),
 	},
-	.probe_new	= rv3029_i2c_probe,
+	.probe		= rv3029_i2c_probe,
 	.id_table	= rv3029_id,
 };
 

drivers/rtc/rtc-rv3032.c

···
 	return err;
 }
 
-static const struct hwmon_channel_info *rv3032_hwmon_info[] = {
+static const struct hwmon_channel_info * const rv3032_hwmon_info[] = {
 	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
 	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST),
 	NULL
···
 		.acpi_match_table = rv3032_i2c_acpi_match,
 		.of_match_table = of_match_ptr(rv3032_of_match),
 	},
-	.probe_new	= rv3032_probe,
+	.probe		= rv3032_probe,
 };
 module_i2c_driver(rv3032_driver);
 

drivers/rtc/rtc-rv8803.c

···
 		.name = "rtc-rv8803",
 		.of_match_table = of_match_ptr(rv8803_of_match),
 	},
-	.probe_new	= rv8803_probe,
+	.probe		= rv8803_probe,
 	.id_table	= rv8803_id,
 };
 module_i2c_driver(rv8803_driver);

drivers/rtc/rtc-rx6110.c

···
 		.name = RX6110_DRIVER_NAME,
 		.acpi_match_table = rx6110_i2c_acpi_match,
 	},
-	.probe_new	= rx6110_i2c_probe,
+	.probe		= rx6110_i2c_probe,
 	.id_table	= rx6110_i2c_id,
 };
 

drivers/rtc/rtc-rx8010.c

···
 		.name = "rtc-rx8010",
 		.of_match_table = of_match_ptr(rx8010_of_match),
 	},
-	.probe_new	= rx8010_probe,
+	.probe		= rx8010_probe,
 	.id_table	= rx8010_id,
 };
 

drivers/rtc/rtc-rx8025.c

···
 	.driver = {
 		.name = "rtc-rx8025",
 	},
-	.probe_new	= rx8025_probe,
+	.probe		= rx8025_probe,
 	.id_table	= rx8025_id,
 };
 

drivers/rtc/rtc-rx8581.c

···
 		.name	= "rtc-rx8581",
 		.of_match_table = of_match_ptr(rx8581_of_match),
 	},
-	.probe_new	= rx8581_probe,
+	.probe		= rx8581_probe,
 	.id_table	= rx8581_id,
 };
 

drivers/rtc/rtc-s35390a.c

···
 		.name	= "rtc-s35390a",
 		.of_match_table = of_match_ptr(s35390a_of_match),
 	},
-	.probe_new	= s35390a_probe,
+	.probe		= s35390a_probe,
 	.id_table	= s35390a_id,
 };
 

drivers/rtc/rtc-sd3078.c

···
 		.name   = "sd3078",
 		.of_match_table = of_match_ptr(rtc_dt_match),
 	},
-	.probe_new  = sd3078_probe,
+	.probe      = sd3078_probe,
 	.id_table   = sd3078_id,
 };
 

drivers/rtc/rtc-st-lpc.c

···
 	enable_irq_wake(rtc->irq);
 	disable_irq(rtc->irq);
 
-	rtc->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(rtc->clk)) {
-		dev_err(&pdev->dev, "Unable to request clock\n");
-		return PTR_ERR(rtc->clk);
-	}
-
-	clk_prepare_enable(rtc->clk);
+	rtc->clk = devm_clk_get_enabled(&pdev->dev, NULL);
+	if (IS_ERR(rtc->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(rtc->clk),
+				     "Unable to request clock\n");
 
 	rtc->clkrate = clk_get_rate(rtc->clk);
 	if (!rtc->clkrate) {
-		clk_disable_unprepare(rtc->clk);
 		dev_err(&pdev->dev, "Unable to fetch clock rate\n");
 		return -EINVAL;
 	}
···
 	do_div(rtc->rtc_dev->range_max, rtc->clkrate);
 
 	ret = devm_rtc_register_device(rtc->rtc_dev);
-	if (ret) {
-		clk_disable_unprepare(rtc->clk);
+	if (ret)
 		return ret;
-	}
 
 	return 0;
 }

drivers/rtc/rtc-stm32.c

···
 	void (*clear_events)(struct stm32_rtc *rtc, unsigned int flags);
 	bool has_pclk;
 	bool need_dbp;
-	bool has_wakeirq;
 };
 
 struct stm32_rtc {
···
 	struct clk *rtc_ck;
 	const struct stm32_rtc_data *data;
 	int irq_alarm;
-	int wakeirq_alarm;
 };
 
 static void stm32_rtc_wpr_unlock(struct stm32_rtc *rtc)
···
 static const struct stm32_rtc_data stm32_rtc_data = {
 	.has_pclk = false,
 	.need_dbp = true,
-	.has_wakeirq = false,
 	.regs = {
 		.tr = 0x00,
 		.dr = 0x04,
···
 static const struct stm32_rtc_data stm32h7_rtc_data = {
 	.has_pclk = true,
 	.need_dbp = true,
-	.has_wakeirq = false,
 	.regs = {
 		.tr = 0x00,
 		.dr = 0x04,
···
 static const struct stm32_rtc_data stm32mp1_data = {
 	.has_pclk = true,
 	.need_dbp = false,
-	.has_wakeirq = true,
 	.regs = {
 		.tr = 0x00,
 		.dr = 0x04,
···
 	}
 
 	ret = device_init_wakeup(&pdev->dev, true);
-	if (rtc->data->has_wakeirq) {
-		rtc->wakeirq_alarm = platform_get_irq(pdev, 1);
-		if (rtc->wakeirq_alarm > 0) {
-			ret = dev_pm_set_dedicated_wake_irq(&pdev->dev,
-							    rtc->wakeirq_alarm);
-		} else {
-			ret = rtc->wakeirq_alarm;
-			if (rtc->wakeirq_alarm == -EPROBE_DEFER)
-				goto err;
-		}
-	}
 	if (ret)
-		dev_warn(&pdev->dev, "alarm can't wake up the system: %d", ret);
+		goto err;
+
+	ret = dev_pm_set_wake_irq(&pdev->dev, rtc->irq_alarm);
+	if (ret)
+		goto err;
 
 	platform_set_drvdata(pdev, rtc);
 
···
 	if (rtc->data->has_pclk)
 		clk_disable_unprepare(rtc->pclk);
 
-	if (device_may_wakeup(dev))
-		return enable_irq_wake(rtc->irq_alarm);
-
 	return 0;
 }
 
···
 			clk_disable_unprepare(rtc->pclk);
 		return ret;
 	}
-
-	if (device_may_wakeup(dev))
-		return disable_irq_wake(rtc->irq_alarm);
 
 	return ret;
 }

drivers/rtc/rtc-x1205.c

···
 		.name	= "rtc-x1205",
 		.of_match_table = x1205_dt_ids,
 	},
-	.probe_new	= x1205_probe,
+	.probe		= x1205_probe,
 	.remove		= x1205_remove,
 	.id_table	= x1205_id,
 };