ARM: EXYNOS: Initialize the clocks prior to timer initialization

Since the clock initialization should be completed prior to the mct
timer initialization, create a new function 'exynos_init_time' that
first sets up the clock and then invokes the timer initialization
function. The 'init_time' callback in the board files are updated to
invoke this new wrapper function.

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

8 files changed, 25 insertions, 9 deletions

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index f4e8222bc3c4..50331790abc8 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -25,6 +25,8 @@
 #include <linux/irqdomain.h>
 #include <linux/irqchip.h>
 #include <linux/of_address.h>
+#include <linux/clocksource.h>
+#include <linux/clk-provider.h>
 #include <linux/irqchip/arm-gic.h>
 
 #include <asm/proc-fns.h>
@@ -395,6 +397,20 @@ static void __init exynos5440_map_io(void)
         iotable_init(exynos5440_iodesc0, ARRAY_SIZE(exynos5440_iodesc0));
 }
 
+void __init exynos_init_time(void)
+{
+        if (of_have_populated_dt()) {
+#ifdef CONFIG_OF
+                of_clk_init(NULL);
+                clocksource_of_init();
+#endif
+        } else {
+                /* todo: remove after migrating legacy E4 platforms to dt */
+                exynos4_clk_init(NULL);
+                mct_init();
+        }
+}
+
 void __init exynos4_init_irq(void)
 {
         unsigned int gic_bank_offset;
diff --git a/arch/arm/mach-exynos/mach-armlex4210.c b/arch/arm/mach-exynos/mach-armlex4210.c
index 376d6964e4aa..2c23b659ae3e 100644
--- a/arch/arm/mach-exynos/mach-armlex4210.c
+++ b/arch/arm/mach-exynos/mach-armlex4210.c
@@ -201,6 +201,6 @@ MACHINE_START(ARMLEX4210, "ARMLEX4210")
         .map_io         = armlex4210_map_io,
         .init_machine   = armlex4210_machine_init,
         .init_late      = exynos_init_late,
-        .init_time      = mct_init,
+        .init_time      = exynos_init_time,
         .restart        = exynos4_restart,
 MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-exynos4-dt.c b/arch/arm/mach-exynos/mach-exynos4-dt.c
index e1f714647e50..47a2190cc453 100644
--- a/arch/arm/mach-exynos/mach-exynos4-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos4-dt.c
@@ -158,7 +158,7 @@ DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)")
         .map_io         = exynos4_dt_map_io,
         .init_machine   = exynos4_dt_machine_init,
         .init_late      = exynos_init_late,
-        .init_time      = clocksource_of_init,
+        .init_time      = exynos_init_time,
         .dt_compat      = exynos4_dt_compat,
         .restart        = exynos4_restart,
         .reserve        = exynos4_reserve,
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
index 06b2e9596cdf..9bae9aa8d548 100644
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -213,7 +213,7 @@ DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
         .map_io         = exynos5_dt_map_io,
         .init_machine   = exynos5_dt_machine_init,
         .init_late      = exynos_init_late,
-        .init_time      = clocksource_of_init,
+        .init_time      = exynos_init_time,
         .dt_compat      = exynos5_dt_compat,
         .restart        = exynos5_restart,
         .reserve        = exynos5_reserve,
diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c
index 8ddbceb5ccc3..0555e6d42d5d 100644
--- a/arch/arm/mach-exynos/mach-nuri.c
+++ b/arch/arm/mach-exynos/mach-nuri.c
@@ -1379,7 +1379,7 @@ MACHINE_START(NURI, "NURI")
         .map_io         = nuri_map_io,
         .init_machine   = nuri_machine_init,
         .init_late      = exynos_init_late,
-        .init_time      = mct_init,
+        .init_time      = exynos_init_time,
         .reserve        = &nuri_reserve,
         .restart        = exynos4_restart,
 MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c
index 620d60c8fbb5..e42e61ae1e1c 100644
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -814,7 +814,7 @@ MACHINE_START(ORIGEN, "ORIGEN")
         .map_io         = origen_map_io,
         .init_machine   = origen_machine_init,
         .init_late      = exynos_init_late,
-        .init_time      = mct_init,
+        .init_time      = exynos_init_time,
         .reserve        = &origen_reserve,
         .restart        = exynos4_restart,
 MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-smdk4x12.c b/arch/arm/mach-exynos/mach-smdk4x12.c
index 63ee1b1a8263..184faa3bd93a 100644
--- a/arch/arm/mach-exynos/mach-smdk4x12.c
+++ b/arch/arm/mach-exynos/mach-smdk4x12.c
@@ -375,7 +375,7 @@ MACHINE_START(SMDK4212, "SMDK4212")
         .init_irq       = exynos4_init_irq,
         .map_io         = smdk4x12_map_io,
         .init_machine   = smdk4x12_machine_init,
-        .init_time      = mct_init,
+        .init_time      = exynos_init_time,
         .restart        = exynos4_restart,
         .reserve        = &smdk4x12_reserve,
 MACHINE_END
@@ -389,7 +389,7 @@ MACHINE_START(SMDK4412, "SMDK4412")
         .map_io         = smdk4x12_map_io,
         .init_machine   = smdk4x12_machine_init,
         .init_late      = exynos_init_late,
-        .init_time      = mct_init,
+        .init_time      = exynos_init_time,
         .restart        = exynos4_restart,
         .reserve        = &smdk4x12_reserve,
 MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-smdkv310.c b/arch/arm/mach-exynos/mach-smdkv310.c
index 51fa235b4dc9..4bf21988d7b3 100644
--- a/arch/arm/mach-exynos/mach-smdkv310.c
+++ b/arch/arm/mach-exynos/mach-smdkv310.c
@@ -422,7 +422,7 @@ MACHINE_START(SMDKV310, "SMDKV310")
         .init_irq       = exynos4_init_irq,
         .map_io         = smdkv310_map_io,
         .init_machine   = smdkv310_machine_init,
-        .init_time      = mct_init,
+        .init_time      = exynos_init_time,
         .reserve        = &smdkv310_reserve,
         .restart        = exynos4_restart,
 MACHINE_END
@@ -435,7 +435,7 @@ MACHINE_START(SMDKC210, "SMDKC210")
         .map_io         = smdkv310_map_io,
         .init_machine   = smdkv310_machine_init,
         .init_late      = exynos_init_late,
-        .init_time      = mct_init,
+        .init_time      = exynos_init_time,
         .reserve        = &smdkv310_reserve,
         .restart        = exynos4_restart,
 MACHINE_END