ARM: mxs: request clock for timer
When mxs_timer_init() does not have a timer_clk passed in, it should
try to request clock from clkdev system.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/mach-mxs/timer.c b/arch/arm/mach-mxs/timer.c
index 564a632..575e8fd 100644
--- a/arch/arm/mach-mxs/timer.c
+++ b/arch/arm/mach-mxs/timer.c
@@ -20,6 +20,7 @@
* MA 02110-1301, USA.
*/
+#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/clockchips.h>
@@ -245,6 +246,14 @@
void __init mxs_timer_init(struct clk *timer_clk, int irq)
{
+ if (!timer_clk) {
+ timer_clk = clk_get_sys("timrot", NULL);
+ if (IS_ERR(timer_clk)) {
+ pr_err("%s: failed to get clk\n", __func__);
+ return;
+ }
+ }
+
clk_prepare_enable(timer_clk);
/*