Merge tag 'socfpga_updates_for_3.15_v2' of git://git.rocketboards.org/linux-socfpga-next into next/drivers

Merge "SOCFPGA updates for 3.15 version 2" from Dinh Nguyen:

*Update SOCFPGA DTS to include ethernet, sd/mmc, and clock fixes
*Add stmmac ethernet glue layer
*Update socfpga_defconfig to include sd/mmc, and micrel_phy

* tag 'socfpga_updates_for_3.15_v2' of git://git.rocketboards.org/linux-socfpga-next:
dts: socfpga: Add sysmgr node so the gmac can use to reference
dts: socfpga: Add support for SD/MMC on the SOCFPGA platform
dts: socfpga: Update clock entry to support multiple parents
ARM: socfpga: Update socfpga_defconfig
dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac.
net: stmmac: Add SOCFPGA glue driver

Signed-off-by: Arnd Bergmann <[e-mail]>

Documentation/devicetree/bindings/mmc/socfpga-dw-mshc.txt

···
+* Altera SOCFPGA specific extensions to the Synopsys Designware Mobile
+  Storage Host Controller
+
+The Synopsys designware mobile storage host controller is used to interface
+a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
+differences between the core Synopsys dw mshc controller properties described
+by synopsys-dw-mshc.txt and the properties used by the Altera SOCFPGA specific
+extensions to the Synopsys Designware Mobile Storage Host Controller.
+
+Required Properties:
+
+* compatible: should be
+	- "altr,socfpga-dw-mshc": for Altera's SOCFPGA platform
+
+Example:
+
+	mmc: dwmmc0@ff704000 {
+		compatible = "altr,socfpga-dw-mshc";
+		reg = <0xff704000 0x1000>;
+		interrupts = <0 129 4>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};

Documentation/devicetree/bindings/net/socfpga-dwmac.txt

···
+Altera SOCFPGA SoC DWMAC controller
+
+The device node has following properties.
+
+Required properties:
+ - compatible	: Should contain "altr,socfpga-stmmac"
+ - altr,sysmgr-syscon : Should be the phandle to the system manager node that
+   encompasses the glue register, and the register offset.
+
+Sub-nodes:
+The dwmac core should be added as subnode to SOCFPGA dwmac glue.
+- dwmac :	The binding details of dwmac can be found in
+  Documentation/devicetree/bindings/net/stmmac.txt
+
+Example:
+
+ethernet0: ethernet0 {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	compatible = "altr,socfpga-stmmac";
+	altr,sysmgr-syscon = <&sysmgr 0x60>;
+	status = "disabled";
+	ranges;
+
+	gmac0: gmac0@ff700000 {
+		compatible = "snps,dwmac-3.70a", "snps,dwmac";
+		reg = <0xff700000 0x2000>;
+		interrupts = <0 115 4>;
+		interrupt-names = "macirq";
+		mac-address = [00 00 00 00 00 00];/* Filled in by U-Boot */
+		clocks = <&emac0_clk>;
+		clock-names = "stmmaceth";
+	};
+};

arch/arm/boot/dts/socfpga.dtsi

···
 					#address-cells = <1>;
 					#size-cells = <0>;
 
-					osc: osc1 {
+					osc1: osc1 {
+						#clock-cells = <0>;
+						compatible = "fixed-clock";
+					};
+
+					osc2: osc2 {
 						#clock-cells = <0>;
 						compatible = "fixed-clock";
 					};
···
 					f2s_periph_ref_clk: f2s_periph_ref_clk {
 						#clock-cells = <0>;
 						compatible = "fixed-clock";
-						clock-frequency = <10000000>;
+					};
+
+					f2s_sdram_ref_clk: f2s_sdram_ref_clk {
+						#clock-cells = <0>;
+						compatible = "fixed-clock";
 					};
 
 					main_pll: main_pll {
···
 						#size-cells = <0>;
 						#clock-cells = <0>;
 						compatible = "altr,socfpga-pll-clock";
-						clocks = <&osc>;
+						clocks = <&osc1>;
 						reg = <0x40>;
 
 						mpuclk: mpuclk {
···
 						#size-cells = <0>;
 						#clock-cells = <0>;
 						compatible = "altr,socfpga-pll-clock";
-						clocks = <&osc>;
+						clocks = <&osc1>, <&osc2>, <&f2s_periph_ref_clk>;
 						reg = <0x80>;
 
 						emac0_clk: emac0_clk {
···
 						#size-cells = <0>;
 						#clock-cells = <0>;
 						compatible = "altr,socfpga-pll-clock";
-						clocks = <&osc>;
+						clocks = <&osc1>, <&osc2>, <&f2s_sdram_ref_clk>;
 						reg = <0xC0>;
 
 						ddr_dqs_clk: ddr_dqs_clk {
···
 				};
 			};
 
-		gmac0: ethernet@ff700000 {
-			compatible = "altr,socfpga-stmmac", "snps,dwmac-3.70a", "snps,dwmac";
-			reg = <0xff700000 0x2000>;
-			interrupts = <0 115 4>;
-			interrupt-names = "macirq";
-			mac-address = [00 00 00 00 00 00];/* Filled in by U-Boot */
-			clocks = <&emac0_clk>;
-			clock-names = "stmmaceth";
+		ethernet0: ethernet0 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "altr,socfpga-stmmac";
+			altr,sysmgr-syscon = <&sysmgr 0x60>;
 			status = "disabled";
+			ranges;
+
+			gmac0: gmac0@ff700000 {
+				compatible = "snps,dwmac-3.70a", "snps,dwmac";
+				reg = <0xff700000 0x2000>;
+				interrupts = <0 115 4>;
+				interrupt-names = "macirq";
+				mac-address = [00 00 00 00 00 00];/* Filled in by U-Boot */
+				clocks = <&emac0_clk>;
+				clock-names = "stmmaceth";
+			};
 		};
 
-		gmac1: ethernet@ff702000 {
-			compatible = "altr,socfpga-stmmac", "snps,dwmac-3.70a", "snps,dwmac";
-			reg = <0xff702000 0x2000>;
-			interrupts = <0 120 4>;
-			interrupt-names = "macirq";
-			mac-address = [00 00 00 00 00 00];/* Filled in by U-Boot */
-			clocks = <&emac1_clk>;
-			clock-names = "stmmaceth";
+		ethernet1: ethernet1 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "altr,socfpga-stmmac";
+			altr,sysmgr-syscon = <&sysmgr 0x60>;
 			status = "disabled";
+			ranges;
+
+			gmac1: gmac1@ff702000 {
+				device_type = "network";
+				compatible = "snps,dwmac-3.70a", "snps,dwmac";
+				reg = <0xff702000 0x2000>;
+				interrupts = <0 120 4>;
+				interrupt-names = "macirq";
+				mac-address = [00 00 00 00 00 00];/* Filled in by U-Boot */
+				clocks = <&emac1_clk>;
+				clock-names = "stmmaceth";
+			};
 		};
 
 		L2: l2-cache@fffef000 {
···
 			cache-level = <2>;
 			arm,tag-latency = <1 1 1>;
 			arm,data-latency = <2 1 1>;
+		};
+
+		mmc: dwmmc0@ff704000 {
+			compatible = "altr,socfpga-dw-mshc";
+			reg = <0xff704000 0x1000>;
+			interrupts = <0 139 4>;
+			fifo-depth = <0x400>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			clocks = <&l4_mp_clk>, <&sdmmc_clk>;
+			clock-names = "biu", "ciu";
 		};
 
 		/* Local timer */
···
 			reg = <0xffd05000 0x1000>;
 		};
 
-		sysmgr@ffd08000 {
-				compatible = "altr,sys-mgr";
-				reg = <0xffd08000 0x4000>;
-			};
+		sysmgr: sysmgr@ffd08000 {
+			compatible = "altr,sys-mgr", "syscon";
+			reg = <0xffd08000 0x4000>;
+		};
 	};
 };

arch/arm/boot/dts/socfpga_arria5.dtsi

···
 			};
 		};
 
+		dwmmc0@ff704000 {
+			num-slots = <1>;
+			supports-highspeed;
+			broken-cd;
+
+			slot@0 {
+				reg = <0>;
+				bus-width = <4>;
+			};
+		};
+
 		serial0@ffc02000 {
 			clock-frequency = <100000000>;
 		};

arch/arm/boot/dts/socfpga_arria5_socdk.dts

···
 		*/
 		ethernet0 = &gmac1;
 	};
+
+	aliases {
+		/* this allow the ethaddr uboot environmnet variable contents
+		 * to be added to the gmac1 device tree blob.
+		 */
+		ethernet0 = &gmac1;
+	};
+};
+
+&ethernet1 {
+	status = "okay";
+};
+
+&gmac1 {
+	phy-mode = "rgmii";
+
+	rxd0-skew-ps = <0>;
+	rxd1-skew-ps = <0>;
+	rxd2-skew-ps = <0>;
+	rxd3-skew-ps = <0>;
+	txen-skew-ps = <0>;
+	txc-skew-ps = <2600>;
+	rxdv-skew-ps = <0>;
+	rxc-skew-ps = <2000>;
 };

arch/arm/boot/dts/socfpga_cyclone5.dtsi

···
 			};
 		};
 
+		dwmmc0@ff704000 {
+			num-slots = <1>;
+			supports-highspeed;
+			broken-cd;
+
+			slot@0 {
+				reg = <0>;
+				bus-width = <4>;
+			};
+		};
+
 		ethernet@ff702000 {
 			phy-mode = "rgmii";
 			phy-addr = <0xffffffff>; /* probe for phy addr */

arch/arm/boot/dts/socfpga_cyclone5_socdk.dts

···
 		ethernet0 = &gmac1;
 	};
 };
+
+&ethernet1 {
+	status = "okay";
+};
+
+&gmac1 {
+	phy-mode = "rgmii";
+
+	rxd0-skew-ps = <0>;
+	rxd1-skew-ps = <0>;
+	rxd2-skew-ps = <0>;
+	rxd3-skew-ps = <0>;
+	txen-skew-ps = <0>;
+	txc-skew-ps = <2600>;
+	rxdv-skew-ps = <0>;
+	rxc-skew-ps = <2000>;
+};

arch/arm/boot/dts/socfpga_cyclone5_sockit.dts

···
 		device_type = "memory";
 		reg = <0x0 0x40000000>; /* 1GB */
 	};
+
+	aliases {
+		/* this allow the ethaddr uboot environmnet variable contents
+		 * to be added to the gmac1 device tree blob.
+		 */
+		ethernet0 = &gmac1;
+	};
+};
+
+&ethernet1 {
+	status = "okay";
 };
 
 &gmac1 {
-	status = "okay";
+	phy-mode = "rgmii";
+
+	rxd0-skew-ps = <0>;
+	rxd1-skew-ps = <0>;
+	rxd2-skew-ps = <0>;
+	rxd3-skew-ps = <0>;
+	txen-skew-ps = <0>;
+	txc-skew-ps = <2600>;
+	rxdv-skew-ps = <0>;
+	rxc-skew-ps = <2000>;
 };

arch/arm/boot/dts/socfpga_vt.dts

···
 			};
 		};
 
+		dwmmc0@ff704000 {
+			num-slots = <1>;
+			supports-highspeed;
+			broken-cd;
+
+			slot@0 {
+				reg = <0>;
+				bus-width = <4>;
+			};
+		};
+
 		ethernet@ff700000 {
 			phy-mode = "gmii";
 			status = "okay";
···
 			cpu1-start-addr = <0xffd08010>;
 		};
 	};
+};
+
+&ethernet0 {
+        status = "okay";
+};
+
+&gmac0 {
+	phy-mode = "gmii";
 };

arch/arm/configs/socfpga_defconfig

···
 # CONFIG_SCSI_LOWLEVEL is not set
 CONFIG_NETDEVICES=y
 CONFIG_STMMAC_ETH=y
+CONFIG_MICREL_PHY=y
 # CONFIG_STMMAC_PHY_ID_ZERO_WORKAROUND is not set
 CONFIG_INPUT_EVDEV=y
 # CONFIG_SERIO_SERPORT is not set
···
 CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT2_FS_POSIX_ACL=y
+CONFIG_EXT3_FS=y
+CONFIG_NFS_FS=y
+CONFIG_ROOT_NFS=y
 # CONFIG_DNOTIFY is not set
 # CONFIG_INOTIFY_USER is not set
 CONFIG_VFAT_FS=y
···
 CONFIG_ENABLE_DEFAULT_TRACERS=y
 CONFIG_DEBUG_USER=y
 CONFIG_XZ_DEC=y
+CONFIG_MMC=y
+CONFIG_MMC_DW=y

drivers/net/ethernet/stmicro/stmmac/Makefile

···
 obj-$(CONFIG_STMMAC_ETH) += stmmac.o
+stmmac-$(CONFIG_ARCH_SOCFPGA) += dwmac-socfpga.o
 stmmac-$(CONFIG_STMMAC_PLATFORM) += stmmac_platform.o
 stmmac-$(CONFIG_STMMAC_PCI) += stmmac_pci.o
 stmmac-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o

drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c

···
+/*  Copyright (C) 2014 Altera Corporation
+ *
+ * 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, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Adopted from dwmac-sti.c
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_net.h>
+#include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/stmmac.h>
+
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0x0
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII 0x1
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK 0x00000003
+
+struct socfpga_dwmac {
+	int	interface;
+	u32	reg_offset;
+	struct	device *dev;
+	struct regmap *sys_mgr_base_addr;
+	struct	device_node *dwmac_np;
+};
+
+static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)
+{
+	struct device_node *np	= dev->of_node;
+	struct device_node *stmmac_np;
+	struct regmap *sys_mgr_base_addr;
+	u32 reg_offset;
+	int ret;
+
+	stmmac_np = of_get_next_available_child(np, NULL);
+	if (!stmmac_np) {
+		dev_info(dev, "No dwmac node found\n");
+		return -EINVAL;
+	}
+
+	if (!of_device_is_compatible(stmmac_np, "snps,dwmac")) {
+		dev_info(dev, "dwmac node isn't compatible with snps,dwmac\n");
+		return -EINVAL;
+	}
+
+	dwmac->interface = of_get_phy_mode(stmmac_np);
+	of_node_put(stmmac_np);
+
+	sys_mgr_base_addr = syscon_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
+	if (IS_ERR(sys_mgr_base_addr)) {
+		dev_info(dev, "No sysmgr-syscon node found\n");
+		return PTR_ERR(sys_mgr_base_addr);
+	}
+
+	ret = of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, &reg_offset);
+	if (ret) {
+		dev_info(dev, "Could not reg_offset into sysmgr-syscon!\n");
+		return -EINVAL;
+	}
+
+	dwmac->reg_offset = reg_offset;
+	dwmac->sys_mgr_base_addr = sys_mgr_base_addr;
+	dwmac->dwmac_np = stmmac_np;
+	dwmac->dev = dev;
+
+	return 0;
+}
+
+static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
+{
+	struct regmap *sys_mgr_base_addr = dwmac->sys_mgr_base_addr;
+	int phymode = dwmac->interface;
+	u32 reg_offset = dwmac->reg_offset;
+	u32 ctrl, val, shift = 0;
+
+	if (of_machine_is_compatible("altr,socfpga-vt"))
+		return 0;
+
+	switch (phymode) {
+	case PHY_INTERFACE_MODE_RGMII:
+		val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
+		break;
+	case PHY_INTERFACE_MODE_MII:
+	case PHY_INTERFACE_MODE_GMII:
+		val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
+		break;
+	default:
+		dev_err(dwmac->dev, "bad phy mode %d\n", phymode);
+		return -EINVAL;
+	}
+
+	regmap_read(sys_mgr_base_addr, reg_offset, &ctrl);
+	ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << shift);
+	ctrl |= val << shift;
+
+	regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
+	return 0;
+}
+
+static int socfpga_dwmac_probe(struct platform_device *pdev)
+{
+	struct device		*dev = &pdev->dev;
+	struct device_node	*node = dev->of_node;
+	int			ret = -ENOMEM;
+	struct socfpga_dwmac	*dwmac;
+
+	dwmac = devm_kzalloc(dev, sizeof(*dwmac), GFP_KERNEL);
+	if (!dwmac)
+		return -ENOMEM;
+
+	ret = socfpga_dwmac_parse_data(dwmac, dev);
+	if (ret) {
+		dev_err(dev, "Unable to parse OF data\n");
+		return ret;
+	}
+
+	ret = socfpga_dwmac_setup(dwmac);
+	if (ret) {
+		dev_err(dev, "couldn't setup SoC glue (%d)\n", ret);
+		return ret;
+	}
+
+	if (node) {
+		ret = of_platform_populate(node, NULL, NULL, dev);
+		if (ret) {
+			dev_err(dev, "failed to add dwmac core\n");
+			return ret;
+		}
+	} else {
+		dev_err(dev, "no device node, failed to add dwmac core\n");
+		return -ENODEV;
+	}
+
+	platform_set_drvdata(pdev, dwmac);
+
+	return 0;
+}
+
+static int socfpga_dwmac_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static const struct of_device_id socfpga_dwmac_match[] = {
+	{ .compatible = "altr,socfpga-stmmac" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, socfpga_dwmac_match);
+
+static struct platform_driver socfpga_dwmac_driver = {
+	.probe		= socfpga_dwmac_probe,
+	.remove		= socfpga_dwmac_remove,
+	.driver		= {
+		.name	= "socfpga-dwmac",
+		.of_match_table = of_match_ptr(socfpga_dwmac_match),
+	},
+};
+
+module_platform_driver(socfpga_dwmac_driver);
+
+MODULE_ALIAS("platform:socfpga-dwmac");
+MODULE_AUTHOR("Dinh Nguyen <[e-mail]>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Altera SOCFPGA DWMAC Glue Layer");