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authorSascha Hauer <s.hauer@pengutronix.de>2012-03-09 09:29:27 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2012-04-25 17:03:45 +0200
commit821dc4dfd955da0679872088025542a0795c6b3e (patch)
tree0f36bc43b9bf76106d43524bd61fbd745da48bd7 /arch/arm/plat-mxc
parent096c19c37b43ee8ce04d4f27022f899ef4133fbb (diff)
downloadop-kernel-dev-821dc4dfd955da0679872088025542a0795c6b3e.zip
op-kernel-dev-821dc4dfd955da0679872088025542a0795c6b3e.tar.gz
ARM i.MX timer: request correct clock
We used to pass the timer clock directly to mxc_timer_init. We should instead request the correct clock. This is an intermediate step: For now we request the clock in the timer code when NULL is passed as clock. Also, the gpt on some i.MX have an additional ipg clock which can be gated. Request and enable this. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r--arch/arm/plat-mxc/time.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c
index 7daf7c9..99f958c 100644
--- a/arch/arm/plat-mxc/time.c
+++ b/arch/arm/plat-mxc/time.c
@@ -25,6 +25,7 @@
#include <linux/irq.h>
#include <linux/clockchips.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <mach/hardware.h>
#include <asm/sched_clock.h>
@@ -282,6 +283,19 @@ static int __init mxc_clockevent_init(struct clk *timer_clk)
void __init mxc_timer_init(struct clk *timer_clk, void __iomem *base, int irq)
{
uint32_t tctl_val;
+ struct clk *timer_ipg_clk;
+
+ if (!timer_clk) {
+ timer_clk = clk_get_sys("imx-gpt.0", "per");
+ if (IS_ERR(timer_clk)) {
+ pr_err("i.MX timer: unable to get clk\n");
+ return;
+ }
+
+ timer_ipg_clk = clk_get_sys("imx-gpt.0", "ipg");
+ if (!IS_ERR(timer_ipg_clk))
+ clk_prepare_enable(timer_ipg_clk);
+ }
clk_prepare_enable(timer_clk);
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