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[v6,11/16] clocksource: mct: add support for mct clock setup

Message ID 1361175686-19400-12-git-send-email-thomas.abraham@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Thomas Abraham Feb. 18, 2013, 8:21 a.m. UTC 
Add support for mct clock lookup and setup to ensure that the mct clock
is has been turned on.

Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
---
 drivers/clocksource/exynos_mct.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
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Patch

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__);