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Commit 54067ee2 authored by sonic zhang's avatar sonic zhang Committed by Jean Delvare
Browse files

i2c-core: i2c bus should support PM entries in struct dev_pm_ops 



Struct dev_pm_ops is not configured in current i2c bus type. i2c drivers
only depends on suspend/resume entries in struct dev_pm_ops are not
informed of PM suspend and resume events by i2c framework.

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 7f508118

drivers/i2c/i2c-core.c

+35 −0
Original line number Diff line number Diff line
@@ -155,6 +155,35 @@ static void i2c_device_shutdown(struct device *dev) 
		driver->shutdown(client);

}



#ifdef CONFIG_SUSPEND

static int i2c_device_pm_suspend(struct device *dev)

{

	const struct dev_pm_ops *pm;



	if (!dev->driver)

		return 0;

	pm = dev->driver->pm;

	if (!pm || !pm->suspend)

		return 0;

	return pm->suspend(dev);

}



static int i2c_device_pm_resume(struct device *dev)

{

	const struct dev_pm_ops *pm;



	if (!dev->driver)

		return 0;

	pm = dev->driver->pm;

	if (!pm || !pm->resume)

		return 0;

	return pm->resume(dev);

}

#else

#define i2c_device_pm_suspend	NULL

#define i2c_device_pm_resume	NULL

#endif



static int i2c_device_suspend(struct device *dev, pm_message_t mesg)

{

	struct i2c_client *client = i2c_verify_client(dev);
@@ -219,6 +248,11 @@ static const struct attribute_group *i2c_dev_attr_groups[] = { 
	NULL

};



const static struct dev_pm_ops i2c_device_pm_ops = {

	.suspend = i2c_device_pm_suspend,

	.resume = i2c_device_pm_resume,

};



struct bus_type i2c_bus_type = {

	.name		= "i2c",

	.match		= i2c_device_match,
@@ -227,6 +261,7 @@ struct bus_type i2c_bus_type = { 
	.shutdown	= i2c_device_shutdown,

	.suspend	= i2c_device_suspend,

	.resume		= i2c_device_resume,

	.pm		= &i2c_device_pm_ops,

};

EXPORT_SYMBOL_GPL(i2c_bus_type);