ARM: EXYNOS: allow legacy board support to specify xxti and xusbxti clock speed

The clock speed of xxti and xusbxti clocks depends on the oscillator
used on the board to generate these clocks. For non-dt platforms,
allow the board support for those platforms to set the clock frequency
of xxti and xusbxti clocks.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

6 files changed, 12 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 50331790abc8..64e56492bfde 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -69,6 +69,8 @@ static void exynos5440_map_io(void);
 static void exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no);
 static int exynos_init(void);
 
+unsigned long xxti_f = 0, xusbxti_f = 0;
+
 static struct cpu_table cpu_ids[] __initdata = {
         {
                 .idcode         = EXYNOS4210_CPU_ID,
@@ -407,6 +409,7 @@ void __init exynos_init_time(void)
         } else {
                 /* todo: remove after migrating legacy E4 platforms to dt */
                 exynos4_clk_init(NULL);
+                exynos4_clk_register_fixed_ext(xxti_f, xusbxti_f);
                 mct_init();
         }
 }
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index ec4098e984b8..cb89ab886950 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -16,6 +16,7 @@
 
 extern void mct_init(void);
 void exynos_init_time(void);
+extern unsigned long xxti_f, xusbxti_f;
 
 struct map_desc;
 void exynos_init_io(struct map_desc *mach_desc, int size);
diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c
index 0555e6d42d5d..0c10852423c3 100644
--- a/arch/arm/mach-exynos/mach-nuri.c
+++ b/arch/arm/mach-exynos/mach-nuri.c
@@ -1331,6 +1331,8 @@ static void __init nuri_map_io(void)
 {
         exynos_init_io(NULL, 0);
         s3c24xx_init_uarts(nuri_uartcfgs, ARRAY_SIZE(nuri_uartcfgs));
+        xxti_f = 0;
+        xusbxti_f = 24000000;
 }
 
 static void __init nuri_reserve(void)
diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c
index e42e61ae1e1c..a9aa5c034b23 100644
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -755,6 +755,8 @@ static void __init origen_map_io(void)
 {
         exynos_init_io(NULL, 0);
         s3c24xx_init_uarts(origen_uartcfgs, ARRAY_SIZE(origen_uartcfgs));
+        xxti_f = 0;
+        xusbxti_f = 24000000;
 }
 
 static void __init origen_power_init(void)
diff --git a/arch/arm/mach-exynos/mach-smdkv310.c b/arch/arm/mach-exynos/mach-smdkv310.c
index 4bf21988d7b3..75eca7d4e128 100644
--- a/arch/arm/mach-exynos/mach-smdkv310.c
+++ b/arch/arm/mach-exynos/mach-smdkv310.c
@@ -372,6 +372,8 @@ static void __init smdkv310_map_io(void)
 {
         exynos_init_io(NULL, 0);
         s3c24xx_init_uarts(smdkv310_uartcfgs, ARRAY_SIZE(smdkv310_uartcfgs));
+        xxti_f = 12000000;
+        xusbxti_f = 24000000;
 }
 
 static void __init smdkv310_reserve(void)
diff --git a/arch/arm/mach-exynos/mach-universal_c210.c b/arch/arm/mach-exynos/mach-universal_c210.c
index 4e6e8cef5cbf..72f08fd7cfa9 100644
--- a/arch/arm/mach-exynos/mach-universal_c210.c
+++ b/arch/arm/mach-exynos/mach-universal_c210.c
@@ -1094,6 +1094,8 @@ static void __init universal_map_io(void)
         exynos_init_io(NULL, 0);
         s3c24xx_init_uarts(universal_uartcfgs, ARRAY_SIZE(universal_uartcfgs));
         samsung_set_timer_source(SAMSUNG_PWM2, SAMSUNG_PWM4);
+        xxti_f = 0;
+        xusbxti_f = 24000000;
 }
 
 static void s5p_tv_setup(void)