[PATCH v2] backlight: Convert from Legacy pm ops to dev_pm_ops

Convert drivers/video/backlight/class to use dev_pm_ops for power
management and remove Legacy PM ops hooks. With this change, rtc class
registers suspend/resume callbacks via class->pm (dev_pm_ops) instead of
Legacy class->suspend/resume. When __device_suspend() runs call-backs,
it will find class->pm ops for the backlight class.

Signed-off-by: Shuah Khan <redacted>
Cc: Shuah Khan <redacted>
---

v2: Updated changelog to correct device class.

 drivers/video/backlight/backlight.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index c74e7aa..0ffb251 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c

@@ -208,7 +208,7 @@ static ssize_t backlight_show_actual_brightness(struct device *dev,
 
 static struct class *backlight_class;
 
-static int backlight_suspend(struct device *dev, pm_message_t state)
+static int backlight_suspend(struct device *dev)
 {
 	struct backlight_device *bd = to_backlight_device(dev);
 

@@ -236,6 +236,9 @@ static int backlight_resume(struct device *dev)
 	return 0;
 }
 
+static SIMPLE_DEV_PM_OPS(backlight_class_dev_pm_ops, backlight_suspend,
+			 backlight_resume);
+
 static void bl_device_release(struct device *dev)
 {
 	struct backlight_device *bd = to_backlight_device(dev);

@@ -414,8 +417,7 @@ static int __init backlight_class_init(void)
 	}
 
 	backlight_class->dev_attrs = bl_device_attributes;
-	backlight_class->suspend = backlight_suspend;
-	backlight_class->resume = backlight_resume;
+	backlight_class->pm = &backlight_class_dev_pm_ops;
 	return 0;
 }
 

-- 
1.7.10.4

On Wednesday, November 14, 2040 8:27 PM, Shuah Khan wrote:

Convert drivers/video/backlight/class to use dev_pm_ops for power
management and remove Legacy PM ops hooks. With this change, rtc class

There is still the typo.

Please fix it. 
 rtc class -> backlight class

registers suspend/resume callbacks via class->pm (dev_pm_ops) instead of
Legacy class->suspend/resume. When __device_suspend() runs call-backs,
it will find class->pm ops for the backlight class.

Signed-off-by: Shuah Khan <redacted>
Cc: Shuah Khan <redacted>

On Wed, Nov 14, 2040 at 04:27:17AM -0700, Shuah Khan wrote:

...

The clock on your computer might be running just a wee bit ahead.

Either that, or we're getting patches from the future.

David

-- 
sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

On 08/09/2013 03:28 PM, David Brown wrote:

On Wed, Nov 14, 2040 at 04:27:17AM -0700, Shuah Khan wrote:

quoted

...

The clock on your computer might be running just a wee bit ahead.

Either that, or we're getting patches from the future.

David

David,

I know what happened. I was testing suspend to disk with pm_trace 
enabled and forgot to set the correct time after the running the test. 
Generated the patch without realizing the time is incorrect. Would like 
me to re-generate it.

-- Shuah

Shuah Khan, Linux Kernel Developer - Open Source Group Samsung Research 
America (Silicon Valley) shuah.kh@samsung.com | (970) 672-0658

On Wednesday, November 14, 2040 04:27:17 AM Shuah Khan wrote:

Convert drivers/video/backlight/class to use dev_pm_ops for power
management and remove Legacy PM ops hooks. With this change, rtc class
registers suspend/resume callbacks via class->pm (dev_pm_ops) instead of
Legacy class->suspend/resume. When __device_suspend() runs call-backs,
it will find class->pm ops for the backlight class.

Signed-off-by: Shuah Khan <redacted>
Cc: Shuah Khan <redacted>

Can you please resend the patches that nobody took with CCs to
linux-pm@vger.kernel.org?  If the original maintainers don't care, I'll be
able to pick those patches up then (if they look good).

Thanks!

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.

On Monday, January 20, 2014 12:37 AM, Rafael J. Wysocki wrote:

On Wednesday, November 14, 2040 04:27:17 AM Shuah Khan wrote:

quoted

Convert drivers/video/backlight/class to use dev_pm_ops for power
management and remove Legacy PM ops hooks. With this change, rtc class
registers suspend/resume callbacks via class->pm (dev_pm_ops) instead of
Legacy class->suspend/resume. When __device_suspend() runs call-backs,
it will find class->pm ops for the backlight class.

Signed-off-by: Shuah Khan <redacted>
Cc: Shuah Khan <redacted>

Can you please resend the patches that nobody took with CCs to
linux-pm@vger.kernel.org?  If the original maintainers don't care, I'll be
able to pick those patches up then (if they look good).

I already gave the comment, and am waiting v3 patch.
However, Shuah Khan did not send the v3 patch yet.

Currently, backlight subsystem patches go through mm-tree
With my acked-by.

Shuah Khan,
Will you send the v3 patch? As I said, there is the typo in
commit message. Please fix it. 
   s/rtc class/backlight class

Best regards,
Jingoo Han

quoted

---

v2: Updated changelog to correct device class.

 drivers/video/backlight/backlight.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index c74e7aa..0ffb251 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c

@@ -208,7 +208,7 @@ static ssize_t backlight_show_actual_brightness(struct device *dev,

 static struct class *backlight_class;

-static int backlight_suspend(struct device *dev, pm_message_t state)
+static int backlight_suspend(struct device *dev)
 {
 	struct backlight_device *bd = to_backlight_device(dev);

@@ -236,6 +236,9 @@ static int backlight_resume(struct device *dev)
 	return 0;
 }

+static SIMPLE_DEV_PM_OPS(backlight_class_dev_pm_ops, backlight_suspend,
+			 backlight_resume);
+
 static void bl_device_release(struct device *dev)
 {
 	struct backlight_device *bd = to_backlight_device(dev);

@@ -414,8 +417,7 @@ static int __init backlight_class_init(void)
 	}

 	backlight_class->dev_attrs = bl_device_attributes;
-	backlight_class->suspend = backlight_suspend;
-	backlight_class->resume = backlight_resume;
+	backlight_class->pm = &backlight_class_dev_pm_ops;
 	return 0;
 }

On 01/19/2014 06:34 PM, Jingoo Han wrote:

On Monday, January 20, 2014 12:37 AM, Rafael J. Wysocki wrote:

quoted

On Wednesday, November 14, 2040 04:27:17 AM Shuah Khan wrote:

quoted

Convert drivers/video/backlight/class to use dev_pm_ops for power
management and remove Legacy PM ops hooks. With this change, rtc class
registers suspend/resume callbacks via class->pm (dev_pm_ops) instead of
Legacy class->suspend/resume. When __device_suspend() runs call-backs,
it will find class->pm ops for the backlight class.

Signed-off-by: Shuah Khan <redacted>
Cc: Shuah Khan <redacted>

Can you please resend the patches that nobody took with CCs to
linux-pm@vger.kernel.org?  If the original maintainers don't care, I'll be
able to pick those patches up then (if they look good).

I already gave the comment, and am waiting v3 patch.
However, Shuah Khan did not send the v3 patch yet.

Currently, backlight subsystem patches go through mm-tree
With my acked-by.

Shuah Khan,
Will you send the v3 patch? As I said, there is the typo in
commit message. Please fix it.
    s/rtc class/backlight class

Rafael/Jingoo Han,

I did send the v3 patch with the typo fixed. Here is the link:

http://lkml.indiana.edu/hypermail/linux/kernel/1306.0/00219.html

This is a while back. I will rebase and res-test and send it.

thanks,
-- Shuah

-- 
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@samsung.com | (970) 672-0658

On 01/19/2014 08:37 AM, Rafael J. Wysocki wrote:

On Wednesday, November 14, 2040 04:27:17 AM Shuah Khan wrote:

quoted

Convert drivers/video/backlight/class to use dev_pm_ops for power
management and remove Legacy PM ops hooks. With this change, rtc class
registers suspend/resume callbacks via class->pm (dev_pm_ops) instead of
Legacy class->suspend/resume. When __device_suspend() runs call-backs,
it will find class->pm ops for the backlight class.

Signed-off-by: Shuah Khan <redacted>
Cc: Shuah Khan <redacted>

Can you please resend the patches that nobody took with CCs to
linux-pm@vger.kernel.org?  If the original maintainers don't care, I'll be
able to pick those patches up then (if they look good).

Rafael,

Thanks. I have a few legacy pm patches that didn't get pulled into 
trees. I will rebase to the latest and resend.

-- Shuah


-- 
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@samsung.com | (970) 672-0658

On 01/20/2014 08:27 AM, Shuah Khan wrote:

On 01/19/2014 06:34 PM, Jingoo Han wrote:

quoted

On Monday, January 20, 2014 12:37 AM, Rafael J. Wysocki wrote:

Rafael/Jingoo Han,

I did send the v3 patch with the typo fixed. Here is the link:

http://lkml.indiana.edu/hypermail/linux/kernel/1306.0/00219.html

This is a while back. I will rebase and res-test and send it.

Checked 3.14-rc1 and patch v3 is in there.

commit 3601792e7b68150420ea8dc129e26e167c0484d8

-- Shuah

-- 
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@samsung.com | (970) 672-0658

On Wednesday, February 05, 2014 2:55 AM, Shuah Khan wrote:

On 01/20/2014 08:27 AM, Shuah Khan wrote:

quoted

On 01/19/2014 06:34 PM, Jingoo Han wrote:

quoted

On Monday, January 20, 2014 12:37 AM, Rafael J. Wysocki wrote:

quoted

Rafael/Jingoo Han,

I did send the v3 patch with the typo fixed. Here is the link:

http://lkml.indiana.edu/hypermail/linux/kernel/1306.0/00219.html

This is a while back. I will rebase and res-test and send it.

Checked 3.14-rc1 and patch v3 is in there.

commit 3601792e7b68150420ea8dc129e26e167c0484d8

OK, I see. I checked that it was already merged to
mainline kernel. Thank you.

Best regards,
Jingoo Han

Shuah Khan [off-list ref] wrote: