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>

1 files changed, 16 insertions, 0 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;