ARM: S5PV210: Migrate clock handling to Common Clock Framework

This patch migrates the s5pv210 platform to use new clock driver
using Common Clock Framework.

Signed-off-by: Mateusz Krawczuk <m.krawczuk@partner.samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[t.figa: Rebased and fixed merge conflicts.]
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s5pv210/Kconfig

@@ -13,6 +13,7 @@ config CPU_S5PV210
 	bool
 	select ARM_AMBA
 	select PL330_DMA if DMADEVICES
+	select S5P_CLOCK if !COMMON_CLK
 	select S5P_EXT_INT
 	select S5P_PM if PM
 	select S5P_SLEEP if PM
@@ -70,6 +71,14 @@ config S5PV210_SETUP_USB_PHY
 	help
 	  Common setup code for USB PHY controller
 
+config COMMON_CLK_S5PV210
+	bool "Common Clock Framework support"
+	default y
+	select COMMON_CLK_SAMSUNG
+	help
+	  Enable this option to use new clock driver
+	  based on Common Clock Framework.
+
 menu "S5PC110 Machines"
 
 config MACH_AQUILA

arch/arm/mach-s5pv210/Makefile

@@ -12,8 +12,8 @@ obj-				:=
 
 # Core
 
-obj-y				+= common.o clock.o
-
+obj-y				+= common.o
+obj-$(CONFIG_S5P_CLOCK)		+= clock.o
 obj-$(CONFIG_PM)		+= pm.o
 
 obj-y				+= dma.o

arch/arm/mach-s5pv210/common.c

@@ -25,6 +25,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/serial_core.h>
 #include <linux/serial_s3c.h>
+#include <linux/of.h>
 
 #include <asm/proc-fns.h>
 #include <asm/mach/arch.h>
@@ -35,7 +36,13 @@
 #include <mach/regs-clock.h>
 
 #include <plat/cpu.h>
+
+#ifdef CONFIG_S5P_CLOCK
 #include <plat/clock.h>
+#else
+#include <linux/clk-provider.h>
+#endif
+
 #include <plat/devs.h>
 #include <plat/sdhci.h>
 #include <plat/adc-core.h>
@@ -50,6 +57,9 @@
 
 #include "common.h"
 
+/* External clock frequency */
+static unsigned long xusbxti_f;
+
 static const char name_s5pv210[] = "S5PV210/S5PC110";
 
 static struct cpu_table cpu_ids[] __initdata = {
@@ -229,18 +239,24 @@ void __init s5pv210_map_io(void)
 
 void __init s5pv210_init_clocks(int xtal)
 {
+#ifdef CONFIG_S5P_CLOCK
 	printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 
 	s3c24xx_register_baseclocks(xtal);
 	s5p_register_clocks(xtal);
 	s5pv210_register_clocks();
 	s5pv210_setup_clocks();
+#else
+	xusbxti_f = xtal;
+#endif
 }
 
 void __init s5pv210_init_irq(void)
 {
 	u32 vic[4];	/* S5PV210 supports 4 VIC */
 
+	s5pv210_clk_init(0, xusbxti_f, S3C_VA_SYS);
+
 	/* All the VICs are fully populated. */
 	vic[0] = ~0;
 	vic[1] = ~0;

arch/arm/mach-s5pv210/common.h

@@ -14,6 +14,15 @@
 
 #include <linux/reboot.h>
 
+#ifdef CONFIG_COMMON_CLK_S5PV210
+void s5pv210_clk_init(unsigned long xxti_f, unsigned long xusbxti_f,
+		      void __iomem *reg_base);
+#else
+static inline void s5pv210_clk_init(unsigned long xxti_f,
+				    unsigned long xusbxti_f,
+				    void __iomem *reg_base) {}
+#endif
+
 void s5pv210_init_io(struct map_desc *mach_desc, int size);
 void s5pv210_init_irq(void);
 

arch/arm/mach-s5pv210/mach-goni.c

@@ -849,7 +849,7 @@ static void __init goni_sound_init(void)
 static void __init goni_map_io(void)
 {
 	s5pv210_init_io(NULL, 0);
-	s3c24xx_init_clocks(clk_xusbxti.rate);
+	s3c24xx_init_clocks(24000000);
 	s3c24xx_init_uarts(goni_uartcfgs, ARRAY_SIZE(goni_uartcfgs));
 	samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }

arch/arm/mach-s5pv210/mach-smdkv210.c

@@ -285,7 +285,7 @@ static struct platform_pwm_backlight_data smdkv210_bl_data = {
 static void __init smdkv210_map_io(void)
 {
 	s5pv210_init_io(NULL, 0);
-	s3c24xx_init_clocks(clk_xusbxti.rate);
+	s3c24xx_init_clocks(24000000);
 	s3c24xx_init_uarts(smdkv210_uartcfgs, ARRAY_SIZE(smdkv210_uartcfgs));
 	samsung_set_timer_source(SAMSUNG_PWM2, SAMSUNG_PWM4);
 }

arch/arm/plat-samsung/Kconfig

@@ -78,7 +78,7 @@ config SAMSUNG_CLKSRC
 	  used by newer systems such as the S3C64XX.
 
 config S5P_CLOCK
-	def_bool ARCH_S5PV210
+	bool
 	help
 	  Support common clock part for ARCH_S5P and ARCH_EXYNOS SoCs