Hi Tarun,
On 12/20/2010 11:05 PM, DebBarma, Tarun Kanti wrote:
For some reason the wakeup enable bit is not getting set on OMAP2430,
OMAP2420. This is inspite of the fact that SYSC_HAS_ENAWAKEUP flag is
present in the hwmod database.
This is indeed strange. Did you observe that on OMAP3 & 4?
Did you use the patch that Kevin did recently to fix an issue with the
ENAWAKEUP bit?
http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-pm.git;a=commit;h=d15ae13fc7428a95b02c1935ebf92324fcb80a5f
The point is that this fix is not really acceptable for my point of view:-(
You really have to check what is going on in the hwmod _enable_wakeup
function.
Regards,
Benoit
I am not sure if there is already a patch to fix this problem. Until the
reason is found we need this patch to boot on the above platforms.
Signed-off-by: Tarun Kanti DebBarma<tarun.kanti@xxxxxx>
---
arch/arm/plat-omap/dmtimer.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index f4aa4a1..007b754 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -227,6 +227,7 @@ static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
static void omap_dm_timer_prepare(struct omap_dm_timer *timer)
{
+ u32 l;
struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data;
if (!pdata->is_omap16xx) {
@@ -243,6 +244,18 @@ static void omap_dm_timer_prepare(struct omap_dm_timer *timer)
if (pdata->dm_timer_reset)
pdata->dm_timer_reset(timer);
+ /*
+ * Enable wake-up on OMAP2420, OMAP2430 CPUs.
+ * FIXME: SYSC_HAS_ENAWAKEUP flag is already set in hwmod database.
+ * But the setting does not seem to work. Need to investigate why
+ * this is happening.
+ */
+ if (cpu_is_omap2430() || cpu_is_omap2420()) {
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_OCP_CFG_REG);
+ l |= 1<< 2;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l);
+ }
+
omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
/* Match hardware reset default of posted mode */
--
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