[PATCH] mfd: wm8994: Don't use system PM operations

[PATCH] mfd: wm8994: Don't use system PM operations

[Mark Brown]

For realistic systems the power management is controlled entirely via
runtime PM - if the device is not runtime suspended then the suspend
will abort without doing anything as functionality such as accessory
detection or audio bypass will require the device to be enabled while
if the device is runtime suspended it is already in the lowest power
state. This means that system suspend is redundant and can be removed
which avoids issues with attempting to double disable the regulators.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
 drivers/mfd/wm8994-core.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 803e93f..8737a47 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -191,7 +191,7 @@ static const char *wm8958_main_supplies[] = {
 	"SPKVDD2",
 };
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_RUNTIME
 static int wm8994_suspend(struct device *dev)
 {
 	struct wm8994 *wm8994 = dev_get_drvdata(dev);
@@ -724,8 +724,9 @@ static const struct i2c_device_id wm8994_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
 
-static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume,
-			    NULL);
+static const struct dev_pm_ops wm8994_pm_ops = {
+	SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
+};
 
 static struct i2c_driver wm8994_i2c_driver = {
 	.driver = {
-- 
1.7.10.4

Re: [PATCH] mfd: wm8994: Don't use system PM operations

[Samuel Ortiz]

Hi Mark,

On Fri, Mar 22, 2013 at 12:40:22PM +0100, Mark Brown wrote:
> For realistic systems the power management is controlled entirely via
> runtime PM - if the device is not runtime suspended then the suspend
> will abort without doing anything as functionality such as accessory
> detection or audio bypass will require the device to be enabled while
> if the device is runtime suspended it is already in the lowest power
> state. This means that system suspend is redundant and can be removed
> which avoids issues with attempting to double disable the regulators.
> 
> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
> ---
>  drivers/mfd/wm8994-core.c |    7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
Applied, thanks.

Cheers,
Samuel.

-- 
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http://oss.intel.com/