diff mbox

[11/14] gpio: omap: Restore power_mode configuration at resume time

Message ID 1523505239-16229-12-git-send-email-j-keerthy@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

J, KEERTHY April 12, 2018, 3:53 a.m. UTC 
From: Dave Gerlach <d-gerlach@ti.com>

Commit 2dc983c565e0 ("gpio/omap: cleanup prepare_for_idle and
resume_after_idle") introduces omap2_gpio_prepare_for_idle and
omap2_gpio_resume_after_idle to properly configure gpios that are used
as wake sources. When entering off mode, omap2_gpio_prepare_for_idle
can set a flag indicating off-mode entry is desired, however once this
flag is set it is never cleared, so any additional calls to this
function, regardless of the mode, have this flag set.

This patch restores the pwr_mode flag to 0 in
omap2_gpio_resume_after_idle to ensure the flag is not misconfigured
during non off-mode operation.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/gpio/gpio-omap.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Tony Lindgren April 12, 2018, 2:39 p.m. UTC | #1 
* Keerthy <j-keerthy@ti.com> [180412 03:56]:
> From: Dave Gerlach <d-gerlach@ti.com>
> 
> Commit 2dc983c565e0 ("gpio/omap: cleanup prepare_for_idle and
> resume_after_idle") introduces omap2_gpio_prepare_for_idle and
> omap2_gpio_resume_after_idle to properly configure gpios that are used
> as wake sources. When entering off mode, omap2_gpio_prepare_for_idle
> can set a flag indicating off-mode entry is desired, however once this
> flag is set it is never cleared, so any additional calls to this
> function, regardless of the mode, have this flag set.
> 
> This patch restores the pwr_mode flag to 0 in
> omap2_gpio_resume_after_idle to ensure the flag is not misconfigured
> during non off-mode operation.

Seems like this should be applied as a fix, can you please add
a proper Fixes tag?

Regards,

Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Grygorii Strashko April 12, 2018, 8:02 p.m. UTC | #2 
On 04/12/2018 09:39 AM, Tony Lindgren wrote:
> * Keerthy <j-keerthy@ti.com> [180412 03:56]:
>> From: Dave Gerlach <d-gerlach@ti.com>
>>
>> Commit 2dc983c565e0 ("gpio/omap: cleanup prepare_for_idle and
>> resume_after_idle") introduces omap2_gpio_prepare_for_idle and
>> omap2_gpio_resume_after_idle to properly configure gpios that are used
>> as wake sources. When entering off mode, omap2_gpio_prepare_for_idle
>> can set a flag indicating off-mode entry is desired, however once this
>> flag is set it is never cleared, so any additional calls to this
>> function, regardless of the mode, have this flag set.
>>
>> This patch restores the pwr_mode flag to 0 in
>> omap2_gpio_resume_after_idle to ensure the flag is not misconfigured
>> during non off-mode operation.
> 
> Seems like this should be applied as a fix, can you please add
> a proper Fixes tag?

Correct. And please send it separate. 
But not sure about fixes (to many changes) - it has to manually checked for the lowest
kernel version to apply.
diff mbox

Patch

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 34fde30..84d664b 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1476,6 +1476,8 @@  void omap2_gpio_resume_after_idle(void)
 			continue;
 
 		pm_runtime_get_sync(bank->chip.parent);
+
+		bank->power_mode = 0;
 	}
 }
 #endif