Timers in PER domain periodically report old time from TCRR in
posted mode if ick < 4*fck. Therefore, set timer to non-posted
whenever ick < 4*fck for all timers.
Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@xxxxxx>
---
arch/arm/plat-omap/dmtimer.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 15e7882..a81b85e 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -378,6 +378,7 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
int ret;
struct dmtimer_platform_data *pdata;
+ struct clk *iclk;
if (unlikely(!timer))
return -EINVAL;
@@ -388,6 +389,17 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
return -EINVAL;
ret = pdata->set_timer_src(timer->pdev, source);
+ /*
+ * Timers in PER domain periodically report old time
+ * from TCRR in posted mode if ick < 4*fck. Hence,
+ * when this condition is satisfied setting the timer
+ * to non-posted mode, instead.
+ */
+ if (!IS_ERR(&ret)) {
+ iclk = clk_get(&timer->pdev->dev, "ick");
+ if (clk_get_rate(iclk) < (4 * clk_get_rate(timer->fclk)))
+ timer->posted = 0;
+ }
return ret;
}
--
1.7.0.4
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