ARM: nomadik: register clocksource from device tree

This switches the Nomadik platform to also registering its
clocksource from the device tree, removing unused support
code as we go along.

Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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 {
@@ -101,7 +106,7 @@
 			pclk: pclk@0 {
 				#clock-cells = <0>;
 				compatible = "fixed-clock";
-				clock-frequency = <2400000>;
+				clock-frequency = <0>;
 			};
 			/*
 			 * The 2.4 MHz TIMCLK reference clock is active at

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

@@ -29,7 +29,7 @@
 #include <linux/platform_data/clk-nomadik.h>
 #include <linux/platform_data/pinctrl-nomadik.h>
 #include <linux/pinctrl/machine.h>
-#include <linux/platform_data/clocksource-nomadik-mtu.h>
+#include <linux/clocksource.h>
 #include <linux/of_irq.h>
 #include <linux/of_gpio.h>
 #include <linux/of_address.h>
@@ -172,7 +172,7 @@ 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 +188,7 @@ 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 = {

drivers/clk/clk-nomadik.c

@@ -17,20 +17,5 @@ static const __initconst struct of_device_id cpu8815_clk_match[] = {
 
 void __init nomadik_clk_init(void)
 {
-	struct clk *clk;
-
-	clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
-	clk_register_clkdev(clk, "apb_pclk", NULL);
-
-	/*
-	 * 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");
-
 	of_clk_init(cpu8815_clk_match);
 }