* [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
@ 2014-03-29 10:11 Alexander Shiyan
2014-03-31 7:38 ` Lee Jones
` (4 more replies)
0 siblings, 5 replies; 10+ messages in thread
From: Alexander Shiyan @ 2014-03-29 10:11 UTC (permalink / raw)
To: linux-fbdev
Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
---
drivers/video/backlight/pwm_bl.c | 17 ++++-------------
1 file changed, 4 insertions(+), 13 deletions(-)
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index b75201f..d5e1f5b 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -359,8 +359,7 @@ static int pwm_backlight_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_PM_SLEEP
-static int pwm_backlight_suspend(struct device *dev)
+static int __maybe_unused pwm_bl_suspend(struct device *dev)
{
struct backlight_device *bl = dev_get_drvdata(dev);
struct pwm_bl_data *pb = bl_get_data(bl);
@@ -376,7 +375,7 @@ static int pwm_backlight_suspend(struct device *dev)
return 0;
}
-static int pwm_backlight_resume(struct device *dev)
+static int __maybe_unused pwm_bl_resume(struct device *dev)
{
struct backlight_device *bl = dev_get_drvdata(dev);
@@ -384,22 +383,14 @@ static int pwm_backlight_resume(struct device *dev)
return 0;
}
-#endif
-static const struct dev_pm_ops pwm_backlight_pm_ops = {
-#ifdef CONFIG_PM_SLEEP
- .suspend = pwm_backlight_suspend,
- .resume = pwm_backlight_resume,
- .poweroff = pwm_backlight_suspend,
- .restore = pwm_backlight_resume,
-#endif
-};
+static SIMPLE_DEV_PM_OPS(pwm_bl_pm_ops, pwm_bl_suspend, pwm_bl_resume);
static struct platform_driver pwm_backlight_driver = {
.driver = {
.name = "pwm-backlight",
.owner = THIS_MODULE,
- .pm = &pwm_backlight_pm_ops,
+ .pm = &pwm_bl_pm_ops,
.of_match_table = of_match_ptr(pwm_backlight_of_match),
},
.probe = pwm_backlight_probe,
--
1.8.3.2
^ permalink raw reply related [flat|nested] 10+ messages in thread* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2014-03-29 10:11 [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS() Alexander Shiyan
@ 2014-03-31 7:38 ` Lee Jones
2014-03-31 8:16 ` Lee Jones
` (3 subsequent siblings)
4 siblings, 0 replies; 10+ messages in thread
From: Lee Jones @ 2014-03-31 7:38 UTC (permalink / raw)
To: linux-fbdev
> Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
>
> Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
> ---
> drivers/video/backlight/pwm_bl.c | 17 ++++-------------
> 1 file changed, 4 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> index b75201f..d5e1f5b 100644
> --- a/drivers/video/backlight/pwm_bl.c
> +++ b/drivers/video/backlight/pwm_bl.c
[...]
> -static int pwm_backlight_resume(struct device *dev)
> +static int __maybe_unused pwm_bl_resume(struct device *dev)
What's the __maybe_unused attribute for?
In include/linux/compiler-gcc.h it redefines the attribute as 'unused':
#define __maybe_unused __attribute__((unused))
... are you sure this is what you want?
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2014-03-29 10:11 [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS() Alexander Shiyan
2014-03-31 7:38 ` Lee Jones
@ 2014-03-31 8:16 ` Lee Jones
2014-03-31 8:50 ` Lee Jones
` (2 subsequent siblings)
4 siblings, 0 replies; 10+ messages in thread
From: Lee Jones @ 2014-03-31 8:16 UTC (permalink / raw)
To: linux-fbdev
> > > Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
> > >
> > > Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
> > > ---
> > > drivers/video/backlight/pwm_bl.c | 17 ++++-------------
> > > 1 file changed, 4 insertions(+), 13 deletions(-)
> > >
> > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> > > index b75201f..d5e1f5b 100644
> > > --- a/drivers/video/backlight/pwm_bl.c
> > > +++ b/drivers/video/backlight/pwm_bl.c
> >
> > [...]
> >
> > > -static int pwm_backlight_resume(struct device *dev)
> > > +static int __maybe_unused pwm_bl_resume(struct device *dev)
> >
> > What's the __maybe_unused attribute for?
> >
> > In include/linux/compiler-gcc.h it redefines the attribute as 'unused':
> >
> > #define __maybe_unused __attribute__((unused))
> >
> > ... are you sure this is what you want?
>
> Yes. This avoids compiler warnings if CONFIG_PM is unset.
What are the advantages of this over the config option? Besides 2
lines of code?
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2014-03-29 10:11 [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS() Alexander Shiyan
2014-03-31 7:38 ` Lee Jones
2014-03-31 8:16 ` Lee Jones
@ 2014-03-31 8:50 ` Lee Jones
2014-04-01 0:08 ` Jingoo Han
2018-12-16 4:21 ` Alexander Shiyan
4 siblings, 0 replies; 10+ messages in thread
From: Lee Jones @ 2014-03-31 8:50 UTC (permalink / raw)
To: linux-fbdev
> > > > > Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
> > > > >
> > > > > Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
> > > > > ---
> > > > > drivers/video/backlight/pwm_bl.c | 17 ++++-------------
> > > > > 1 file changed, 4 insertions(+), 13 deletions(-)
> > > > >
> > > > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> > > > > index b75201f..d5e1f5b 100644
> > > > > --- a/drivers/video/backlight/pwm_bl.c
> > > > > +++ b/drivers/video/backlight/pwm_bl.c
> > > >
> > > > [...]
> > > >
> > > > > -static int pwm_backlight_resume(struct device *dev)
> > > > > +static int __maybe_unused pwm_bl_resume(struct device *dev)
> > > >
> > > > What's the __maybe_unused attribute for?
> > > >
> > > > In include/linux/compiler-gcc.h it redefines the attribute as 'unused':
> > > >
> > > > #define __maybe_unused __attribute__((unused))
> > > >
> > > > ... are you sure this is what you want?
> > >
> > > Yes. This avoids compiler warnings if CONFIG_PM is unset.
> >
> > What are the advantages of this over the config option? Besides 2
> > lines of code?
>
> Just an increase compile coverage.
What does this mean? I replied to another one of your patches with the
same question.
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2014-03-29 10:11 [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS() Alexander Shiyan
` (2 preceding siblings ...)
2014-03-31 8:50 ` Lee Jones
@ 2014-04-01 0:08 ` Jingoo Han
2018-12-16 4:21 ` Alexander Shiyan
4 siblings, 0 replies; 10+ messages in thread
From: Jingoo Han @ 2014-04-01 0:08 UTC (permalink / raw)
To: linux-fbdev
On Monday, March 31, 2014 7:37 PM, Lee Jones wrote:
> Mon, 31 Mar 2014 09:50:47 +0100 от Lee Jones <lee.jones@linaro.org>:
> > > > > > > Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
> > > > > > >
> > > > > > > Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
> > > > > > > ---
> > > > > > > drivers/video/backlight/pwm_bl.c | 17 ++++-------------
> > > > > > > 1 file changed, 4 insertions(+), 13 deletions(-)
> > > > > > >
> > > > > > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> > > > > > > index b75201f..d5e1f5b 100644
> > > > > > > --- a/drivers/video/backlight/pwm_bl.c
> > > > > > > +++ b/drivers/video/backlight/pwm_bl.c
> > > > > >
> > > > > > [...]
> > > > > >
> > > > > > > -static int pwm_backlight_resume(struct device *dev)
> > > > > > > +static int __maybe_unused pwm_bl_resume(struct device *dev)
> > > > > >
> > > > > > What's the __maybe_unused attribute for?
> > > > > >
> > > > > > In include/linux/compiler-gcc.h it redefines the attribute as 'unused':
> > > > > >
> > > > > > #define __maybe_unused __attribute__((unused))
> > > > > >
> > > > > > ... are you sure this is what you want?
> > > > >
> > > > > Yes. This avoids compiler warnings if CONFIG_PM is unset.
> > > >
> > > > What are the advantages of this over the config option? Besides 2
> > > > lines of code?
> > >
> > > Just an increase compile coverage.
> >
> > What does this mean? I replied to another one of your patches with the
> > same question.
>
> Code parts for suspend() and resume() will be compiled regardless of
> CONFIG_PM option and will be discarded by linker if CONFIG_PM is not set.
(+cc Joe Perches, Dan Carpenter)
Original patch is
http://www.spinics.net/lists/linux-fbdev/msg14177.html
I don't think that __maybe_unused is good.
Currently, SIMPLE_DEV_PM_OPS is using "#ifdef CONFIG_PM_SLEEP" as below.
So, suspend_fn, resume_fn should be protected by "#ifdef CONFIG_PM_SLEEP".
Maybe, it is necessary to fix SET_SYSTEM_SLEEP_PM_OPS define,
in order to increase compile coverage.
./include/linux/pm.h
#define SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
const struct dev_pm_ops name = { \
SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
}
#ifdef CONFIG_PM_SLEEP
#define SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
.suspend = suspend_fn, \
.resume = resume_fn, \
.freeze = suspend_fn, \
.thaw = resume_fn, \
.poweroff = suspend_fn, \
.restore = resume_fn,
#else
#define SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn)
#endif
Please, don’t remove "#ifdef CONFIG_PM_SLEEP".
Your patch can be modified as below:
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -386,14 +386,7 @@ static int pwm_backlight_resume(struct device *dev)
}
#endif
-static const struct dev_pm_ops pwm_backlight_pm_ops = {
-#ifdef CONFIG_PM_SLEEP
- .suspend = pwm_backlight_suspend,
- .resume = pwm_backlight_resume,
- .poweroff = pwm_backlight_suspend,
- .restore = pwm_backlight_resume,
-#endif
-};
+static SIMPLE_DEV_PM_OPS(pwm_bl_pm_ops, pwm_bl_suspend, pwm_bl_resume);
Best regards,
Jingoo Han
^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2014-03-29 10:11 [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS() Alexander Shiyan
` (3 preceding siblings ...)
2014-04-01 0:08 ` Jingoo Han
@ 2018-12-16 4:21 ` Alexander Shiyan
2018-12-17 12:05 ` Daniel Thompson
4 siblings, 1 reply; 10+ messages in thread
From: Alexander Shiyan @ 2018-12-16 4:21 UTC (permalink / raw)
To: linux-fbdev
Cc: linux-pwm, Daniel Thompson, Alexander Shiyan,
Bartlomiej Zolnierkiewicz, Jingoo Han, dri-devel, Thierry Reding,
Lee Jones
Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
As a side effect, removing #ifdef CONFIG_PM_SLEEP will improve
compilation coverage.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
---
drivers/video/backlight/pwm_bl.c | 17 ++++-------------
1 file changed, 4 insertions(+), 13 deletions(-)
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index f9ef067..33503ce 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -667,8 +667,7 @@ static void pwm_backlight_shutdown(struct platform_device *pdev)
pwm_backlight_power_off(pb);
}
-#ifdef CONFIG_PM_SLEEP
-static int pwm_backlight_suspend(struct device *dev)
+static int __maybe_unused pwm_bl_suspend(struct device *dev)
{
struct backlight_device *bl = dev_get_drvdata(dev);
struct pwm_bl_data *pb = bl_get_data(bl);
@@ -684,7 +683,7 @@ static int pwm_backlight_suspend(struct device *dev)
return 0;
}
-static int pwm_backlight_resume(struct device *dev)
+static int __maybe_unused pwm_bl_resume(struct device *dev)
{
struct backlight_device *bl = dev_get_drvdata(dev);
@@ -692,21 +691,13 @@ static int pwm_backlight_resume(struct device *dev)
return 0;
}
-#endif
-static const struct dev_pm_ops pwm_backlight_pm_ops = {
-#ifdef CONFIG_PM_SLEEP
- .suspend = pwm_backlight_suspend,
- .resume = pwm_backlight_resume,
- .poweroff = pwm_backlight_suspend,
- .restore = pwm_backlight_resume,
-#endif
-};
+static SIMPLE_DEV_PM_OPS(pwm_bl_pm_ops, pwm_bl_suspend, pwm_bl_resume);
static struct platform_driver pwm_backlight_driver = {
.driver = {
.name = "pwm-backlight",
- .pm = &pwm_backlight_pm_ops,
+ .pm = &pwm_bl_pm_ops,
.of_match_table = of_match_ptr(pwm_backlight_of_match),
},
.probe = pwm_backlight_probe,
--
2.10.2
^ permalink raw reply related [flat|nested] 10+ messages in thread* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2018-12-16 4:21 ` Alexander Shiyan
@ 2018-12-17 12:05 ` Daniel Thompson
0 siblings, 0 replies; 10+ messages in thread
From: Daniel Thompson @ 2018-12-17 12:05 UTC (permalink / raw)
To: Alexander Shiyan
Cc: linux-pwm, linux-fbdev, Bartlomiej Zolnierkiewicz, Jingoo Han,
dri-devel, Thierry Reding, Lee Jones
On Sun, Dec 16, 2018 at 07:21:12AM +0300, Alexander Shiyan wrote:
> Use the SIMPLE_DEV_PM_OPS() macro to declare the driver's pm_ops.
> As a side effect, removing #ifdef CONFIG_PM_SLEEP will improve
> compilation coverage.
>
> Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
> ---
> drivers/video/backlight/pwm_bl.c | 17 ++++-------------
> 1 file changed, 4 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> index f9ef067..33503ce 100644
> --- a/drivers/video/backlight/pwm_bl.c
> +++ b/drivers/video/backlight/pwm_bl.c
> @@ -667,8 +667,7 @@ static void pwm_backlight_shutdown(struct platform_device *pdev)
> pwm_backlight_power_off(pb);
> }
>
> -#ifdef CONFIG_PM_SLEEP
> -static int pwm_backlight_suspend(struct device *dev)
> +static int __maybe_unused pwm_bl_suspend(struct device *dev)
Why rename the symbol. It no longer matches the coding style of the
file.
> {
> struct backlight_device *bl = dev_get_drvdata(dev);
> struct pwm_bl_data *pb = bl_get_data(bl);
> @@ -684,7 +683,7 @@ static int pwm_backlight_suspend(struct device *dev)
> return 0;
> }
>
> -static int pwm_backlight_resume(struct device *dev)
> +static int __maybe_unused pwm_bl_resume(struct device *dev)
Same here.
> {
> struct backlight_device *bl = dev_get_drvdata(dev);
>
> @@ -692,21 +691,13 @@ static int pwm_backlight_resume(struct device *dev)
>
> return 0;
> }
> -#endif
>
> -static const struct dev_pm_ops pwm_backlight_pm_ops = {
> -#ifdef CONFIG_PM_SLEEP
> - .suspend = pwm_backlight_suspend,
> - .resume = pwm_backlight_resume,
> - .poweroff = pwm_backlight_suspend,
> - .restore = pwm_backlight_resume,
> -#endif
> -};
> +static SIMPLE_DEV_PM_OPS(pwm_bl_pm_ops, pwm_bl_suspend, pwm_bl_resume);
And same here...
Daniel.
>
> static struct platform_driver pwm_backlight_driver = {
> .driver = {
> .name = "pwm-backlight",
> - .pm = &pwm_backlight_pm_ops,
> + .pm = &pwm_bl_pm_ops,
> .of_match_table = of_match_ptr(pwm_backlight_of_match),
> },
> .probe = pwm_backlight_probe,
> --
> 2.10.2
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
@ 2014-03-31 7:41 Alexander Shiyan
2014-03-31 8:18 ` Alexander Shiyan
2014-03-31 10:36 ` Alexander Shiyan
0 siblings, 2 replies; 10+ messages in thread
From: Alexander Shiyan @ 2014-03-31 7:41 UTC (permalink / raw)
To: linux-fbdev
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Ci0tLQoK
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2014-03-31 7:41 Alexander Shiyan
@ 2014-03-31 8:18 ` Alexander Shiyan
2014-03-31 10:36 ` Alexander Shiyan
1 sibling, 0 replies; 10+ messages in thread
From: Alexander Shiyan @ 2014-03-31 8:18 UTC (permalink / raw)
To: linux-fbdev
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^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS()
2014-03-31 7:41 Alexander Shiyan
2014-03-31 8:18 ` Alexander Shiyan
@ 2014-03-31 10:36 ` Alexander Shiyan
1 sibling, 0 replies; 10+ messages in thread
From: Alexander Shiyan @ 2014-03-31 10:36 UTC (permalink / raw)
To: linux-fbdev
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^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2018-12-17 12:05 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-03-29 10:11 [PATCH] backlight: pwm_bl: Use SIMPLE_DEV_PM_OPS() Alexander Shiyan
2014-03-31 7:38 ` Lee Jones
2014-03-31 8:16 ` Lee Jones
2014-03-31 8:50 ` Lee Jones
2014-04-01 0:08 ` Jingoo Han
2018-12-16 4:21 ` Alexander Shiyan
2018-12-17 12:05 ` Daniel Thompson
-- strict thread matches above, loose matches on Subject: below --
2014-03-31 7:41 Alexander Shiyan
2014-03-31 8:18 ` Alexander Shiyan
2014-03-31 10:36 ` Alexander Shiyan
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