ARM: S3C24XX: add platform code for conversion to the common clock framework

This adds the necessary init functions to init the clocks from the common
clock framework and necessary CONFIG_SAMSUNG_CLOCK ifdefs around the legacy
clock code.

This also includes empty stubs for the *_setup_clocks functions that are
called from the cpufreq driver on resume.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s3c24xx/Kconfig

@@ -18,6 +18,11 @@ config PLAT_S3C24XX
 	help
 	  Base platform code for any Samsung S3C24XX device
 
+config S3C2410_COMMON_CLK
+	bool
+	help
+	  Build the s3c2410 clock driver based on the common clock framework.
+
 config S3C2410_COMMON_DCLK
 	bool
 	select REGMAP_MMIO

arch/arm/mach-s3c24xx/common.c

@@ -53,6 +53,7 @@
 #include <plat/cpu-freq.h>
 #include <plat/pll.h>
 #include <plat/pwm-core.h>
+#include <plat/watchdog-reset.h>
 
 #include "common.h"
 
@@ -533,6 +534,14 @@ struct platform_device s3c2443_device_dma = {
 };
 #endif
 
+#if defined(CONFIG_COMMON_CLK) && defined(CONFIG_CPU_S3C2410)
+void __init s3c2410_init_clocks(int xtal)
+{
+	s3c2410_common_clk_init(NULL, xtal, 0, S3C24XX_VA_CLKPWR);
+	samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG);
+}
+#endif
+
 #ifdef CONFIG_CPU_S3C2412
 void __init s3c2412_init_clocks(int xtal)
 {
@@ -547,6 +556,22 @@ void __init s3c2416_init_clocks(int xtal)
 }
 #endif
 
+#if defined(CONFIG_COMMON_CLK) && defined(CONFIG_CPU_S3C2440)
+void __init s3c2440_init_clocks(int xtal)
+{
+	s3c2410_common_clk_init(NULL, xtal, 1, S3C24XX_VA_CLKPWR);
+	samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG);
+}
+#endif
+
+#if defined(CONFIG_COMMON_CLK) && defined(CONFIG_CPU_S3C2442)
+void __init s3c2442_init_clocks(int xtal)
+{
+	s3c2410_common_clk_init(NULL, xtal, 2, S3C24XX_VA_CLKPWR);
+	samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG);
+}
+#endif
+
 #ifdef CONFIG_CPU_S3C2443
 void __init s3c2443_init_clocks(int xtal)
 {

arch/arm/mach-s3c24xx/common.h

@@ -77,6 +77,7 @@ extern void s3c244x_restart(enum reboot_mode mode, const char *cmd);
 #ifdef CONFIG_CPU_S3C2440
 extern  int s3c2440_init(void);
 extern void s3c2440_map_io(void);
+extern void s3c2440_init_clocks(int xtal);
 extern void s3c2440_init_irq(void);
 #else
 #define s3c2440_init NULL
@@ -86,6 +87,7 @@ extern void s3c2440_init_irq(void);
 #ifdef CONFIG_CPU_S3C2442
 extern  int s3c2442_init(void);
 extern void s3c2442_map_io(void);
+extern void s3c2442_init_clocks(int xtal);
 extern void s3c2442_init_irq(void);
 #else
 #define s3c2442_init NULL
@@ -116,6 +118,11 @@ extern struct platform_device s3c2443_device_dma;
 
 extern struct platform_device s3c2410_device_dclk;
 
+#ifdef CONFIG_S3C2410_COMMON_CLK
+void __init s3c2410_common_clk_init(struct device_node *np, unsigned long xti_f,
+				    int current_soc,
+				    void __iomem *reg_base);
+#endif
 #ifdef CONFIG_S3C2412_COMMON_CLK
 void __init s3c2412_common_clk_init(struct device_node *np, unsigned long xti_f,
 				unsigned long ext_f, void __iomem *reg_base);

arch/arm/mach-s3c24xx/s3c2410.c

@@ -83,6 +83,7 @@ void __init s3c2410_map_io(void)
 	iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
 }
 
+#ifdef CONFIG_SAMSUNG_CLOCK
 void __init_or_cpufreq s3c2410_setup_clocks(void)
 {
 	struct clk *xtal_clk;
@@ -142,6 +143,11 @@ void __init s3c2410_init_clocks(int xtal)
 	clkdev_add_table(s3c2410_clk_lookup, ARRAY_SIZE(s3c2410_clk_lookup));
 	samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG);
 }
+#else
+void __init_or_cpufreq s3c2410_setup_clocks(void)
+{
+}
+#endif
 
 struct bus_type s3c2410_subsys = {
 	.name = "s3c2410-core",

arch/arm/mach-s3c24xx/s3c2442.c

@@ -53,6 +53,7 @@
 
 #include "common.h"
 
+#ifdef CONFIG_SAMSUNG_CLOCK
 /* S3C2442 extended clock support */
 
 static unsigned long s3c2442_camif_upll_round(struct clk *clk,
@@ -162,7 +163,7 @@ static __init int s3c2442_clk_init(void)
 }
 
 arch_initcall(s3c2442_clk_init);
-
+#endif
 
 static struct device s3c2442_dev = {
 	.bus		= &s3c2442_subsys,

arch/arm/mach-s3c24xx/s3c244x.c

@@ -78,6 +78,7 @@ void __init s3c244x_map_io(void)
 	s3c2410_device_dclk.name = "s3c2440-dclk";
 }
 
+#ifdef CONFIG_SAMSUNG_CLOCK
 void __init_or_cpufreq s3c244x_setup_clocks(void)
 {
 	struct clk *xtal_clk;
@@ -138,6 +139,11 @@ void __init s3c244x_init_clocks(int xtal)
 	s3c2410_baseclk_add();
 	samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG);
 }
+#else
+void __init_or_cpufreq s3c244x_setup_clocks(void)
+{
+}
+#endif
 
 /* Since the S3C2442 and S3C2440 share items, put both subsystems here */