Add support for mct clock lookup and setup to ensure that the mct clock
is has been turned on.
Cc: Kukjin Kim <kgene....@samsung.com>
Signed-off-by: Thomas Abraham <thomas.abra...@linaro.org>
---
drivers/clocksource/exynos_mct.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index 8f84c42..43e39b5 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -480,7 +480,7 @@ static struct local_timer_ops exynos4_mct_tick_ops
__cpuinitdata = {
static void __init exynos4_timer_resources(struct device_node *np)
{
- struct clk *tick_clk;
+ struct clk *mct_clk, *tick_clk;
tick_clk = np ? of_clk_get_by_name(np, "fin_pll") :
clk_get(NULL, "fin_pll");
@@ -488,6 +488,11 @@ static void __init exynos4_timer_resources(struct
device_node *np)
panic("%s: unable to determine tick clock rate\n", __func__);
clk_rate = clk_get_rate(tick_clk);
+ mct_clk = np ? of_clk_get_by_name(np, "mct") : clk_get(NULL, "mct");
+ if (IS_ERR(mct_clk))
+ panic("%s: unable to retrieve mct clock instance\n", __func__);
+ clk_prepare_enable(mct_clk);
+
reg_base = np ? of_iomap(np, 0) : S5P_VA_SYSTIMER;
if (!reg_base)
panic("%s: unable to ioremap mct address space\n", __func__);
--
1.7.5.4
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