* [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl
@ 2017-01-03 9:02 Peter Chen
2017-01-03 11:14 ` Mark Brown
2017-01-03 14:34 ` kbuild test robot
0 siblings, 2 replies; 6+ messages in thread
From: Peter Chen @ 2017-01-03 9:02 UTC (permalink / raw)
To: lgirdwood, broonie; +Cc: linux-kernel, Peter Chen
At some systems, the pinctrl setting will be lost or needs to
set as "sleep" state to save power consumption. So, we need to
configure pinctrl as "sleep" state when system enters suspend,
and as "default" state after system resumes. In this way, the
pinctrl value can be recovered as "default" state after resuming.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
drivers/regulator/fixed.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index a43b0e8..8f41015 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -245,11 +245,32 @@ static const struct of_device_id fixed_of_match[] = {
MODULE_DEVICE_TABLE(of, fixed_of_match);
#endif
+#ifdef CONFIG_PM_SLEEP
+static int reg_fixed_voltage_suspend(struct device *dev)
+{
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+static int reg_fixed_voltage_resume(struct device *dev)
+{
+ pinctrl_pm_select_default_state(dev);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops reg_fixed_voltage_pm_ops = {
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(reg_fixed_voltage_suspend,
+ reg_fixed_voltage_resume)
+};
+
static struct platform_driver regulator_fixed_voltage_driver = {
.probe = reg_fixed_voltage_probe,
.driver = {
.name = "reg-fixed-voltage",
.of_match_table = of_match_ptr(fixed_of_match),
+ .pm = ®_fixed_voltage_pm_ops,
},
};
--
2.7.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl
2017-01-03 9:02 [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl Peter Chen
@ 2017-01-03 11:14 ` Mark Brown
2017-01-04 6:51 ` Peter Chen
` (2 more replies)
2017-01-03 14:34 ` kbuild test robot
1 sibling, 3 replies; 6+ messages in thread
From: Mark Brown @ 2017-01-03 11:14 UTC (permalink / raw)
To: Peter Chen; +Cc: lgirdwood, linux-kernel
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On Tue, Jan 03, 2017 at 05:02:47PM +0800, Peter Chen wrote:
> At some systems, the pinctrl setting will be lost or needs to
> set as "sleep" state to save power consumption. So, we need to
> configure pinctrl as "sleep" state when system enters suspend,
> and as "default" state after system resumes. In this way, the
> pinctrl value can be recovered as "default" state after resuming.
I thought this was supposed to be done automatically by the driver core?
If not it should be, every single driver is likely to end up with that.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl
2017-01-03 9:02 [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl Peter Chen
2017-01-03 11:14 ` Mark Brown
@ 2017-01-03 14:34 ` kbuild test robot
1 sibling, 0 replies; 6+ messages in thread
From: kbuild test robot @ 2017-01-03 14:34 UTC (permalink / raw)
To: Peter Chen; +Cc: kbuild-all, lgirdwood, broonie, linux-kernel, Peter Chen
[-- Attachment #1: Type: text/plain, Size: 1934 bytes --]
Hi Peter,
[auto build test ERROR on regulator/for-next]
[also build test ERROR on v4.10-rc2 next-20170103]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Peter-Chen/regulator-fixed-add-suspend-pm-routines-for-pinctrl/20170103-214456
base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next
config: i386-randconfig-a0-201701 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
drivers/regulator/fixed.c: In function 'reg_fixed_voltage_suspend':
>> drivers/regulator/fixed.c:251:2: error: implicit declaration of function 'pinctrl_pm_select_sleep_state' [-Werror=implicit-function-declaration]
pinctrl_pm_select_sleep_state(dev);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/regulator/fixed.c: In function 'reg_fixed_voltage_resume':
>> drivers/regulator/fixed.c:257:2: error: implicit declaration of function 'pinctrl_pm_select_default_state' [-Werror=implicit-function-declaration]
pinctrl_pm_select_default_state(dev);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/pinctrl_pm_select_sleep_state +251 drivers/regulator/fixed.c
245 MODULE_DEVICE_TABLE(of, fixed_of_match);
246 #endif
247
248 #ifdef CONFIG_PM_SLEEP
249 static int reg_fixed_voltage_suspend(struct device *dev)
250 {
> 251 pinctrl_pm_select_sleep_state(dev);
252
253 return 0;
254 }
255 static int reg_fixed_voltage_resume(struct device *dev)
256 {
> 257 pinctrl_pm_select_default_state(dev);
258
259 return 0;
260 }
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
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^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl
2017-01-03 11:14 ` Mark Brown
@ 2017-01-04 6:51 ` Peter Chen
2017-01-04 7:05 ` Peter Chen
2017-01-20 8:11 ` Peter Chen
2 siblings, 0 replies; 6+ messages in thread
From: Peter Chen @ 2017-01-04 6:51 UTC (permalink / raw)
To: Mark Brown; +Cc: lgirdwood, linux-kernel
>On Tue, Jan 03, 2017 at 05:02:47PM +0800, Peter Chen wrote:
>> At some systems, the pinctrl setting will be lost or needs to set as
>> "sleep" state to save power consumption. So, we need to configure
>> pinctrl as "sleep" state when system enters suspend, and as "default"
>> state after system resumes. In this way, the pinctrl value can be
>> recovered as "default" state after resuming.
>
>I thought this was supposed to be done automatically by the driver core?
>If not it should be, every single driver is likely to end up with that.
Good idea, I will send a patch for that.
Peter
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl
2017-01-03 11:14 ` Mark Brown
2017-01-04 6:51 ` Peter Chen
@ 2017-01-04 7:05 ` Peter Chen
2017-01-20 8:11 ` Peter Chen
2 siblings, 0 replies; 6+ messages in thread
From: Peter Chen @ 2017-01-04 7:05 UTC (permalink / raw)
To: Mark Brown; +Cc: lgirdwood, linux-kernel
>>On Tue, Jan 03, 2017 at 05:02:47PM +0800, Peter Chen wrote:
>>> At some systems, the pinctrl setting will be lost or needs to set as
>>> "sleep" state to save power consumption. So, we need to configure
>>> pinctrl as "sleep" state when system enters suspend, and as "default"
>>> state after system resumes. In this way, the pinctrl value can be
>>> recovered as "default" state after resuming.
>>
>>I thought this was supposed to be done automatically by the driver core?
>>If not it should be, every single driver is likely to end up with that.
>
>Good idea, I will send a patch for that.
>
After checking more, it is not suitable for driver core do it since different driver
has different usage for "sleep" pinctrl. Below are some examples:
- Some drivers set "idle" for pinctrl when system goes to suspend
- Some drivers has some conditions for setting "sleep" for pinctrl
eg: drivers/net/ethernet/freescale/fec_main.c
- Some drivers may set "sleep" for pinctrl as ->close interface, but not system suspend
interface
- Some drivers can be woken up for "sleep" pinctrl, some may not.
Peter
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl
2017-01-03 11:14 ` Mark Brown
2017-01-04 6:51 ` Peter Chen
2017-01-04 7:05 ` Peter Chen
@ 2017-01-20 8:11 ` Peter Chen
2 siblings, 0 replies; 6+ messages in thread
From: Peter Chen @ 2017-01-20 8:11 UTC (permalink / raw)
To: Mark Brown; +Cc: lgirdwood, linux-kernel
>
>>>On Tue, Jan 03, 2017 at 05:02:47PM +0800, Peter Chen wrote:
>>>> At some systems, the pinctrl setting will be lost or needs to set as
>>>> "sleep" state to save power consumption. So, we need to configure
>>>> pinctrl as "sleep" state when system enters suspend, and as "default"
>>>> state after system resumes. In this way, the pinctrl value can be
>>>> recovered as "default" state after resuming.
>>>
>>>I thought this was supposed to be done automatically by the driver core?
>>>If not it should be, every single driver is likely to end up with that.
>>
>>Good idea, I will send a patch for that.
>>
>
>After checking more, it is not suitable for driver core do it since different driver has
>different usage for "sleep" pinctrl. Below are some examples:
>
>- Some drivers set "idle" for pinctrl when system goes to suspend
>- Some drivers has some conditions for setting "sleep" for pinctrl
>eg: drivers/net/ethernet/freescale/fec_main.c
>- Some drivers may set "sleep" for pinctrl as ->close interface, but not system
>suspend interface
>- Some drivers can be woken up for "sleep" pinctrl, some may not.
>
Hi Mark,
Any more comment for this patch?
Thanks.
Peter
^ permalink raw reply [flat|nested] 6+ messages in thread
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2017-01-03 9:02 [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl Peter Chen
2017-01-03 11:14 ` Mark Brown
2017-01-04 6:51 ` Peter Chen
2017-01-04 7:05 ` Peter Chen
2017-01-20 8:11 ` Peter Chen
2017-01-03 14:34 ` kbuild test robot
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