Device tree patches for the Nomadik machine:

- Move clock registration to the device tree
 - Support probing the MTU timer from the device tree
 - Register user LED and user key in the device tree
 - Update defconfig to account for user LED and user key
 - Move pin control mappings to the device tree
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Merge tag 'nomadik-dt-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into next/dt

From Linus Walleij:
Device tree patches for the Nomadik machine:
- Move clock registration to the device tree
- Support probing the MTU timer from the device tree
- Register user LED and user key in the device tree
- Update defconfig to account for user LED and user key
- Move pin control mappings to the device tree

* tag 'nomadik-dt-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
  ARM: nomadik: move the pin configuration to DT
  ARM: nomadik: add led and key for S8815
  ARM: nomadik: register clocksource from device tree
  ARM: nomadik: convert all clocks except timer to dt
  clocksource: nomadik-mtu: support of probe

Signed-off-by: Olof Johansson <olof@lixom.net>

Documentation/devicetree/bindings/arm/ste-nomadik.txt

@@ -3,6 +3,11 @@ ST-Ericsson Nomadik Device Tree Bindings
 For various board the "board" node may contain specific properties
 that pertain to this particular board, such as board-specific GPIOs.
 
+Required root node property: src
+- Nomadik System and reset controller used for basic chip control, clock
+  and reset line control.
+- compatible: must be "stericsson,nomadik,src"
+
 Boards with the Nomadik SoC include:
 
 S8815 "MiniKit" manufactured by Calao Systems:

arch/arm/boot/dts/ste-nomadik-s8815.dts

@@ -22,6 +22,43 @@
 		};
 	};
 
+	pinctrl {
+		/* Hog CD pins */
+		pinctrl-names = "default";
+		pinctrl-0 = <&cd_default_mode>;
+
+		mmcsd-cd {
+			cd_default_mode: cd_default {
+				cd_default_cfg1 {
+					/* CD input GPIO */
+					ste,pins = "GPIO111_H21";
+					ste,input = <0>;
+				};
+				cd_default_cfg2 {
+					/* CD GPIO biasing */
+					ste,pins = "GPIO112_J21";
+					ste,output = <0>;
+				};
+			};
+		};
+		user-led {
+			user_led_default_mode: user_led_default {
+				user_led_default_cfg {
+					ste,pins = "GPIO2_C5";
+					ste,output = <1>;
+				};
+			};
+		};
+		user-button {
+			user_button_default_mode: user_button_default {
+				user_button_default_cfg {
+					ste,pins = "GPIO3_A4";
+					ste,input = <0>;
+				};
+			};
+		};
+	};
+
 	/* Custom board node with GPIO pins to active etc */
 	usb-s8815 {
 		/* The S8815 is using this very GPIO pin for the SMSC91x IRQs */
@@ -33,4 +70,30 @@
 			gpios = <&gpio3 16 0x1>;
 		};
 	};
+
+	/* The user LED on the board is set up to be used for heartbeat */
+	leds {
+		compatible = "gpio-leds";
+		user-led {
+			label = "user_led";
+			gpios = <&gpio0 2 0x1>;
+			default-state = "off";
+			linux,default-trigger = "heartbeat";
+			pinctrl-names = "default";
+			pinctrl-0 = <&user_led_default_mode>;
+		};
+	};
+
+	/* User key mapped in as "escape" */
+	gpio-keys {
+		compatible = "gpio-keys";
+		user-button {
+			label = "user_button";
+			gpios = <&gpio0 3 0x1>;
+			linux,code = <1>; /* KEY_ESC */
+			gpio-key,wakeup;
+			pinctrl-names = "default";
+			pinctrl-0 = <&user_button_default_mode>;
+		};
+	};
 };

arch/arm/boot/dts/ste-nomadik-stn8815.dtsi

@@ -21,18 +21,23 @@
 		cache-level = <2>;
 	};
 
-	mtu0 {
+	mtu0: mtu@101e2000 {
 		/* Nomadik system timer */
+		compatible = "st,nomadik-mtu";
 		reg = <0x101e2000 0x1000>;
 		interrupt-parent = <&vica>;
 		interrupts = <4>;
+		clocks = <&timclk>, <&pclk>;
+		clock-names = "timclk", "apb_pclk";
 	};
 
-	mtu1 {
+	mtu1: mtu@101e3000 {
 		/* Secondary timer */
 		reg = <0x101e3000 0x1000>;
 		interrupt-parent = <&vica>;
 		interrupts = <5>;
+		clocks = <&timclk>, <&pclk>;
+		clock-names = "timclk", "apb_pclk";
 	};
 
 	gpio0: gpio@101e4000 {
@@ -45,6 +50,7 @@
 		gpio-controller;
 		#gpio-cells = <2>;
 		gpio-bank = <0>;
+		clocks = <&pclk>;
 	};
 
 	gpio1: gpio@101e5000 {
@@ -57,6 +63,7 @@
 		gpio-controller;
 		#gpio-cells = <2>;
 		gpio-bank = <1>;
+		clocks = <&pclk>;
 	};
 
 	gpio2: gpio@101e6000 {
@@ -69,6 +76,7 @@
 		gpio-controller;
 		#gpio-cells = <2>;
 		gpio-bank = <2>;
+		clocks = <&pclk>;
 	};
 
 	gpio3: gpio@101e7000 {
@@ -81,10 +89,117 @@
 		gpio-controller;
 		#gpio-cells = <2>;
 		gpio-bank = <3>;
+		clocks = <&pclk>;
 	};
 
 	pinctrl {
 		compatible = "stericsson,nmk-pinctrl-stn8815";
+		/* Pin configurations */
+		uart0 {
+			uart0_default_mux: uart0_mux {
+				u0_default_mux {
+					ste,function = "u0";
+					ste,pins = "u0_a_1";
+				};
+			};
+		};
+		uart1 {
+			uart1_default_mux: uart1_mux {
+				u1_default_mux {
+					ste,function = "u1";
+					ste,pins = "u1_a_1";
+				};
+			};
+		};
+		mmcsd {
+			mmcsd_default_mux: mmcsd_mux {
+				mmcsd_default_mux {
+					ste,function = "mmcsd";
+					ste,pins = "mmcsd_a_1";
+				};
+			};
+			mmcsd_default_mode: mmcsd_default {
+				mmcsd_default_cfg1 {
+					/* MCCLK */
+					ste,pins = "GPIO8_B10";
+					ste,output = <0>;
+				};
+				mmcsd_default_cfg2 {
+					/* MCCMDDIR, MCDAT0DIR, MCDAT31DIR */
+					ste,pins = "GPIO10_C11", "GPIO15_A12",
+					"GPIO16_C13";
+					ste,output = <1>;
+				};
+				mmcsd_default_cfg3 {
+					/* MCCMD, MCDAT3-0, MCMSFBCLK */
+					ste,pins = "GPIO9_A10", "GPIO11_B11",
+					"GPIO12_A11", "GPIO13_C12",
+					"GPIO14_B12", "GPIO24_C15";
+					ste,input = <1>;
+				};
+			};
+		};
+		i2c0 {
+			i2c0_default_mode: i2c0_default {
+				i2c0_default_cfg {
+					ste,pins = "GPIO62_D3", "GPIO63_D2";
+					ste,input = <1>;
+				};
+			};
+		};
+		i2c1 {
+			i2c1_default_mode: i2c1_default {
+				i2c1_default_cfg {
+					ste,pins = "GPIO53_L4", "GPIO54_L3";
+					ste,input = <1>;
+				};
+			};
+		};
+		i2c2 {
+			i2c2_default_mode: i2c2_default {
+				i2c2_default_cfg {
+					ste,pins = "GPIO73_C21", "GPIO74_C20";
+					ste,input = <1>;
+				};
+			};
+		};
+	};
+
+	src: src@101e0000 {
+		compatible = "stericsson,nomadik-src";
+		reg = <0x101e0000 0x1000>;
+		clocks {
+			/*
+			 * Dummy clock for primecells
+			 */
+			pclk: pclk@0 {
+				#clock-cells = <0>;
+				compatible = "fixed-clock";
+				clock-frequency = <0>;
+			};
+			/*
+			 * The 2.4 MHz TIMCLK reference clock is active at
+			 * boot time, this is actually the MXTALCLK @19.2 MHz
+			 * divided by 8. This clock is used by the timers and
+			 * watchdog. See page 105 ff.
+			 */
+			timclk: timclk@2.4M {
+				#clock-cells = <0>;
+				compatible = "fixed-clock";
+				clock-frequency = <2400000>;
+			};
+			/*
+			 * At boot time, PLL2 is set to generate a set of
+			 * fixed clocks, one of them is CLK48, the 48 MHz
+			 * clock, routed to the UART, MMC/SD, I2C, IrDA,
+			 * USB and SSP blocks.
+			 */
+			clk48: clk48@48M {
+				#clock-cells = <0>;
+				compatible = "fixed-clock";
+				clock-frequency = <48000000>;
+			};
+		};
 	};
 
 	/* A NAND flash of 128 MiB */
@@ -97,6 +212,7 @@
 			<0x41000000 0x2000>,	/* NAND Base ADDR */
 			<0x40800000 0x2000>;	/* NAND Base CMD */
 		reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd";
+		clocks = <&pclk>;
 		status = "okay";
 
 		partition@0 {
@@ -144,6 +260,8 @@
 			<&gpio1 30 0>; /* scl */
 		#address-cells = <1>;
 		#size-cells = <0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c0_default_mode>;
 
 		stw4811@2d {
 			   compatible = "st,stw4811";
@@ -158,6 +276,8 @@
 			<&gpio1 21 0>; /* scl */
 		#address-cells = <1>;
 		#size-cells = <0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c1_default_mode>;
 
 		camera@2d {
 			   compatible = "st,camera";
@@ -180,6 +300,9 @@
 			<&gpio2 9 0>; /* scl */
 		#address-cells = <1>;
 		#size-cells = <0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c2_default_mode>;
+
 		stw4811@2d {
 			   compatible = "st,stw4811-usb";
 			   reg = <0x2d>;
@@ -211,6 +334,10 @@
 			reg = <0x101fd000 0x1000>;
 			interrupt-parent = <&vica>;
 			interrupts = <12>;
+			clocks = <&clk48>, <&pclk>;
+			clock-names = "uartclk", "apb_pclk";
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart0_default_mux>;
 		};
 
 		uart1: uart@101fb000 {
@@ -218,6 +345,10 @@
 			reg = <0x101fb000 0x1000>;
 			interrupt-parent = <&vica>;
 			interrupts = <17>;
+			clocks = <&clk48>, <&pclk>;
+			clock-names = "uartclk", "apb_pclk";
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart1_default_mux>;
 		};
 
 		uart2: uart@101f2000 {
@@ -225,17 +356,23 @@
 			reg = <0x101f2000 0x1000>;
 			interrupt-parent = <&vica>;
 			interrupts = <28>;
+			clocks = <&clk48>, <&pclk>;
+			clock-names = "uartclk", "apb_pclk";
 			status = "disabled";
 		};
 
 		rng: rng@101b0000 {
 			compatible = "arm,primecell";
 			reg = <0x101b0000 0x1000>;
+			clocks = <&clk48>, <&pclk>;
+			clock-names = "rng", "apb_pclk";
 		};
 
 		rtc: rtc@101e8000 {
 			compatible = "arm,pl031", "arm,primecell";
 			reg = <0x101e8000 0x1000>;
+			clocks = <&pclk>;
+			clock-names = "apb_pclk";
 			interrupt-parent = <&vica>;
 			interrupts = <10>;
 		};
@@ -243,6 +380,8 @@
 		mmcsd: sdi@101f6000 {
 			compatible = "arm,pl18x", "arm,primecell";
 			reg = <0x101f6000 0x1000>;
+			clocks = <&clk48>, <&pclk>;
+			clock-names = "mclk", "apb_pclk";
 			interrupt-parent = <&vica>;
 			interrupts = <22>;
 			max-frequency = <48000000>;
@@ -251,6 +390,8 @@
 			mmc-cap-sd-highspeed;
 			cd-gpios = <&gpio3 15 0x1>;
 			cd-inverted;
+			pinctrl-names = "default";
+			pinctrl-0 = <&mmcsd_default_mux>, <&mmcsd_default_mode>;
 		};
 	};
 };

arch/arm/configs/nhk8815_defconfig

@@ -81,6 +81,7 @@ CONFIG_PPP_SYNC_TTY=m
 # CONFIG_INPUT_MOUSEDEV is not set
 CONFIG_INPUT_EVDEV=y
 # CONFIG_KEYBOARD_ATKBD is not set
+CONFIG_KEYBOARD_GPIO=y
 # CONFIG_MOUSE_PS2 is not set
 # CONFIG_SERIO is not set
 # CONFIG_LEGACY_PTYS is not set
@@ -96,6 +97,11 @@ CONFIG_DEBUG_GPIO=y
 CONFIG_MMC=y
 CONFIG_MMC_CLKGATE=y
 CONFIG_MMC_ARMMMCI=y
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_PL031=y
 CONFIG_DMADEVICES=y

arch/arm/mach-nomadik/Kconfig

@@ -6,6 +6,7 @@ config ARCH_NOMADIK
 	select ARM_VIC
 	select CLKSRC_NOMADIK_MTU
 	select CLKSRC_NOMADIK_MTU_SCHED_CLOCK
+	select CLKSRC_OF
 	select COMMON_CLK
 	select CPU_ARM926T
 	select GENERIC_CLOCKEVENTS

arch/arm/mach-nomadik/cpu-8815.c

@@ -27,9 +27,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/irqchip.h>
 #include <linux/platform_data/clk-nomadik.h>
-#include <linux/platform_data/pinctrl-nomadik.h>
+#include <linux/clocksource.h>
-#include <linux/pinctrl/machine.h>
-#include <linux/platform_data/clocksource-nomadik-mtu.h>
 #include <linux/of_irq.h>
 #include <linux/of_gpio.h>
 #include <linux/of_address.h>
@@ -91,48 +89,6 @@
 #define NOMADIK_L2CC_BASE	0x10210000	/* L2 Cache controller */
 #define NOMADIK_UART1_VBASE	0xF01FB000
 
-static unsigned long out_low[] = { PIN_OUTPUT_LOW };
-static unsigned long out_high[] = { PIN_OUTPUT_HIGH };
-static unsigned long in_nopull[] = { PIN_INPUT_NOPULL };
-static unsigned long in_pullup[] = { PIN_INPUT_PULLUP };
-
-static struct pinctrl_map __initdata nhk8815_pinmap[] = {
-	PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-stn8815", "u0_a_1", "u0"),
-	PIN_MAP_MUX_GROUP_DEFAULT("uart1", "pinctrl-stn8815", "u1_a_1", "u1"),
-	/* Hog in MMC/SD card mux */
-	PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-stn8815", "mmcsd_a_1", "mmcsd"),
-	/* MCCLK */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO8_B10", out_low),
-	/* MCCMD */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO9_A10", in_pullup),
-	/* MCCMDDIR */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO10_C11", out_high),
-	/* MCDAT3-0 */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO11_B11", in_pullup),
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO12_A11", in_pullup),
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO13_C12", in_pullup),
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO14_B12", in_pullup),
-	/* MCDAT0DIR */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO15_A12", out_high),
-	/* MCDAT31DIR */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO16_C13", out_high),
-	/* MCMSFBCLK */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO24_C15", in_pullup),
-	/* CD input GPIO */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO111_H21", in_nopull),
-	/* CD bias drive */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO112_J21", out_low),
-	/* I2C0 */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO62_D3", in_pullup),
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO63_D2", in_pullup),
-	/* I2C1 */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO53_L4", in_pullup),
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO54_L3", in_pullup),
-	/* I2C2 */
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO73_C21", in_pullup),
-	PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO74_C20", in_pullup),
-};
-
 /* This is needed for LL-debug/earlyprintk/debug-macro.S */
 static struct map_desc cpu8815_io_desc[] __initdata = {
 	{
@@ -172,7 +128,7 @@ static void __init cpu8815_timer_init_of(void)
 	/* We need this to be up now */
 	nomadik_clk_init();
 
-	mtu = of_find_node_by_path("/mtu0");
+	mtu = of_find_node_by_path("/mtu@101e2000");
 	if (!mtu)
 		return;
 	base = of_iomap(mtu, 0);
@@ -188,7 +144,7 @@ static void __init cpu8815_timer_init_of(void)
 	src_cr |= SRC_CR_INIT_VAL;
 	writel(src_cr, base);
 
-	nmdk_timer_init(base, irq);
+	clocksource_of_init();
 }
 
 static struct fsmc_nand_timings cpu8815_nand_timings = {
@@ -280,28 +236,10 @@ device_initcall(cpu8815_mmcsd_init);
 
 /* These are mostly to get the right device names for the clock lookups */
 static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = {
-	OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO0_BASE,
-		"gpio.0", NULL),
-	OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO1_BASE,
-		"gpio.1", NULL),
-	OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO2_BASE,
-		"gpio.2", NULL),
-	OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO3_BASE,
-		"gpio.3", NULL),
-	OF_DEV_AUXDATA("stericsson,nmk-pinctrl-stn8815", 0,
-		"pinctrl-stn8815", NULL),
-	OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART0_BASE,
-		"uart0", NULL),
-	OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART1_BASE,
-		"uart1", NULL),
-	OF_DEV_AUXDATA("arm,primecell", NOMADIK_RNG_BASE,
-		"rng", NULL),
-	OF_DEV_AUXDATA("arm,primecell", NOMADIK_RTC_BASE,
-		"rtc-pl031", NULL),
 	OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE,
-		"fsmc-nand", &cpu8815_nand_data),
+		NULL, &cpu8815_nand_data),
 	OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE,
-		"mmci", &mmcsd_plat_data),
+		NULL, &mmcsd_plat_data),
 	{ /* sentinel */ },
 };
 
@@ -311,7 +249,6 @@ static void __init cpu8815_init_of(void)
 	/* At full speed latency must be >=2, so 0x249 in low bits */
 	l2x0_of_init(0x00730249, 0xfe000fff);
 #endif
-	pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap));
 	of_platform_populate(NULL, of_default_bus_match_table,
 			cpu8815_auxdata_lookup, NULL);
 }

drivers/clk/clk-nomadik.c

@@ -3,46 +3,19 @@
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/clk-provider.h>
+#include <linux/of.h>
 
 /*
  * The Nomadik clock tree is described in the STN8815A12 DB V4.2
  * reference manual for the chip, page 94 ff.
  */
 
+static const __initconst struct of_device_id cpu8815_clk_match[] = {
+	{ .compatible = "fixed-clock", .data = of_fixed_clk_setup, },
+	{ /* sentinel */ }
+};
+
 void __init nomadik_clk_init(void)
 {
-	struct clk *clk;
+	of_clk_init(cpu8815_clk_match);
-
-	clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
-	clk_register_clkdev(clk, "apb_pclk", NULL);
-	clk_register_clkdev(clk, NULL, "gpio.0");
-	clk_register_clkdev(clk, NULL, "gpio.1");
-	clk_register_clkdev(clk, NULL, "gpio.2");
-	clk_register_clkdev(clk, NULL, "gpio.3");
-	clk_register_clkdev(clk, NULL, "rng");
-	clk_register_clkdev(clk, NULL, "fsmc-nand");
-
-	/*
-	 * The 2.4 MHz TIMCLK reference clock is active at boot time, this is
-	 * actually the MXTALCLK @19.2 MHz divided by 8. This clock is used
-	 * by the timers and watchdog. See page 105 ff.
-	 */
-	clk = clk_register_fixed_rate(NULL, "TIMCLK", NULL, CLK_IS_ROOT,
-				      2400000);
-	clk_register_clkdev(clk, NULL, "mtu0");
-	clk_register_clkdev(clk, NULL, "mtu1");
-
-	/*
-	 * At boot time, PLL2 is set to generate a set of fixed clocks,
-	 * one of them is CLK48, the 48 MHz clock, routed to the UART, MMC/SD
-	 * I2C, IrDA, USB and SSP blocks.
-	 */
-	clk = clk_register_fixed_rate(NULL, "CLK48", NULL, CLK_IS_ROOT,
-				      48000000);
-	clk_register_clkdev(clk, NULL, "uart0");
-	clk_register_clkdev(clk, NULL, "uart1");
-	clk_register_clkdev(clk, NULL, "mmci");
-	clk_register_clkdev(clk, NULL, "ssp");
-	clk_register_clkdev(clk, NULL, "nmk-i2c.0");
-	clk_register_clkdev(clk, NULL, "nmk-i2c.1");
 }

drivers/clocksource/nomadik-mtu.c

@@ -13,6 +13,9 @@
 #include <linux/io.h>
 #include <linux/clockchips.h>
 #include <linux/clocksource.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
 #include <linux/clk.h>
 #include <linux/jiffies.h>
 #include <linux/delay.h>
@@ -188,22 +191,15 @@ static struct irqaction nmdk_timer_irq = {
 	.dev_id		= &nmdk_clkevt,
 };
 
-void __init nmdk_timer_init(void __iomem *base, int irq)
+static void __init __nmdk_timer_init(void __iomem *base, int irq,
+				     struct clk *pclk, struct clk *clk)
 {
 	unsigned long rate;
-	struct clk *clk0, *pclk0;
 
 	mtu_base = base;
 
-	pclk0 = clk_get_sys("mtu0", "apb_pclk");
+	BUG_ON(clk_prepare_enable(pclk));
-	BUG_ON(IS_ERR(pclk0));
+	BUG_ON(clk_prepare_enable(clk));
-	BUG_ON(clk_prepare(pclk0) < 0);
-	BUG_ON(clk_enable(pclk0) < 0);
-
-	clk0 = clk_get_sys("mtu0", NULL);
-	BUG_ON(IS_ERR(clk0));
-	BUG_ON(clk_prepare(clk0) < 0);
-	BUG_ON(clk_enable(clk0) < 0);
 
 	/*
 	 * Tick rate is 2.4MHz for Nomadik and 2.4Mhz, 100MHz or 133 MHz
@@ -213,7 +209,7 @@ void __init nmdk_timer_init(void __iomem *base, int irq)
 	 * to wake-up at a max 127s a head in time. Dividing a 2.4 MHz timer
 	 * with 16 gives too low timer resolution.
 	 */
-	rate = clk_get_rate(clk0);
+	rate = clk_get_rate(clk);
 	if (rate > 32000000) {
 		rate /= 16;
 		clk_prescale = MTU_CRn_PRESCALE_16;
@@ -247,3 +243,53 @@ void __init nmdk_timer_init(void __iomem *base, int irq)
 	mtu_delay_timer.freq = rate;
 	register_current_timer_delay(&mtu_delay_timer);
 }
+
+void __init nmdk_timer_init(void __iomem *base, int irq)
+{
+	struct clk *clk0, *pclk0;
+
+	pclk0 = clk_get_sys("mtu0", "apb_pclk");
+	BUG_ON(IS_ERR(pclk0));
+	clk0 = clk_get_sys("mtu0", NULL);
+	BUG_ON(IS_ERR(clk0));
+
+	__nmdk_timer_init(base, irq, pclk0, clk0);
+}
+
+static struct of_device_id nmdk_timer_match[] __initconst = {
+	{ .compatible = "st,nomadik-mtu" },
+	{}
+};
+
+static void __init nmdk_timer_of_init(void)
+{
+	struct device_node *node;
+	struct clk *pclk;
+	struct clk *clk;
+	void __iomem *base;
+	int irq;
+
+	node = of_find_matching_node(NULL, nmdk_timer_match);
+	if (!node)
+		panic("No timer node");
+
+	base = of_iomap(node, 0);
+	if (!base)
+		panic("Can't remap registers");
+
+	pclk = of_clk_get_by_name(node, "apb_pclk");
+	if (IS_ERR(pclk))
+		panic("could not get apb_pclk");
+
+	clk = of_clk_get_by_name(node, "timclk");
+	if (IS_ERR(clk))
+		panic("could not get timclk");
+
+	irq = irq_of_parse_and_map(node, 0);
+	if (irq <= 0)
+		panic("Can't parse IRQ");
+
+	__nmdk_timer_init(base, irq, pclk, clk);
+}
+CLOCKSOURCE_OF_DECLARE(nomadik_mtu, "st,nomadik-mtu",
+		       nmdk_timer_of_init);