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clocksource: mct: add support for mct clock setup

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Add support for mct clock lookup and setup to ensure that the mct
clock is has been turned on.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Thomas Abraham 2013-03-09 17:10:37 +09:00 committed by Kukjin Kim
parent 415ac2e240
commit ca9048ec31
1 changed files with 6 additions and 1 deletions
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7
drivers/clocksource/exynos_mct.c
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@ -479,7 +479,7 @@ 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");
@ -487,6 +487,11 @@ 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__);