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ALSA: ac97: Switch to dev_pm_ops 

Convert the ac97_bus from legacy suspend/resume callbacks to dev_pm_ops.

Since there isn't anything special to do at the bus level the bus driver
does not have to implement any callbacks. The device driver core will
automatically pick up and execute the device's PM ops.

As there is only a single AC'97 driver implementing suspend and resume,
update both the core and driver at the same time to avoid unnecessary code
churn.

While we are at it also drop the ifdefs around the suspend/resume functions
to increase compile test coverage.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Lars-Peter Clausen 2015-08-21 09:48:33 +02:00 committed by Takashi Iwai
parent 00833d70ca
commit 9bc07dfbcd
2 changed files with 4 additions and 35 deletions
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13
drivers/input/touchscreen/wm97xx-core.c
View File

@ -732,8 +732,7 @@ static int wm97xx_remove(struct device *dev)
return 0;
}
#ifdef CONFIG_PM
static int wm97xx_suspend(struct device *dev, pm_message_t state)
static int __maybe_unused wm97xx_suspend(struct device *dev)
{
struct wm97xx *wm = dev_get_drvdata(dev);
u16 reg;
@ -765,7 +764,7 @@ static int wm97xx_suspend(struct device *dev, pm_message_t state)
return 0;
}
static int wm97xx_resume(struct device *dev)
static int __maybe_unused wm97xx_resume(struct device *dev)
{
struct wm97xx *wm = dev_get_drvdata(dev);
@ -799,10 +798,7 @@ static int wm97xx_resume(struct device *dev)
return 0;
}
#else
#define wm97xx_suspend NULL
#define wm97xx_resume NULL
#endif
static SIMPLE_DEV_PM_OPS(wm97xx_pm_ops, wm97xx_suspend, wm97xx_resume);
/*
* Machine specific operations
@ -836,8 +832,7 @@ static struct device_driver wm97xx_driver = {
.owner = THIS_MODULE,
.probe = wm97xx_probe,
.remove = wm97xx_remove,
.suspend = wm97xx_suspend,
.resume = wm97xx_resume,
.pm = &wm97xx_pm_ops,
};
static int __init wm97xx_init(void)

26
sound/ac97_bus.c
View File

@ -27,35 +27,9 @@ static int ac97_bus_match(struct device *dev, struct device_driver *drv)
return 1;
}
#ifdef CONFIG_PM
static int ac97_bus_suspend(struct device *dev, pm_message_t state)
{
int ret = 0;
if (dev->driver && dev->driver->suspend)
ret = dev->driver->suspend(dev, state);
return ret;
}
static int ac97_bus_resume(struct device *dev)
{
int ret = 0;
if (dev->driver && dev->driver->resume)
ret = dev->driver->resume(dev);
return ret;
}
#endif /* CONFIG_PM */
struct bus_type ac97_bus_type = {
.name = "ac97",
.match = ac97_bus_match,
#ifdef CONFIG_PM
.suspend = ac97_bus_suspend,
.resume = ac97_bus_resume,
#endif /* CONFIG_PM */
};
static int __init ac97_bus_init(void)