Commit f84f9ae3 authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Greg Kroah-Hartman
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usb: misc: usb3503: Add system sleep support in non-I2C mode 



USB3503 chip can be used without any I2C connection, what is handled by
a simple platform device driver. Add support for resetting the chip (via
GPIO lines) during system suspend/resume cycle by adding calls to existing
suspend/resume functions used for E2C device.

Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2c904963

drivers/usb/misc/usb3503.c

+30 −8
Original line number Diff line number Diff line
@@ -355,11 +355,8 @@ static int usb3503_platform_remove(struct platform_device *pdev) 
}



#ifdef CONFIG_PM_SLEEP

static int usb3503_i2c_suspend(struct device *dev)

static int usb3503_suspend(struct usb3503 *hub)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct usb3503 *hub = i2c_get_clientdata(client);



	usb3503_switch_mode(hub, USB3503_MODE_STANDBY);



	if (hub->clk)
@@ -368,11 +365,8 @@ static int usb3503_i2c_suspend(struct device *dev) 
	return 0;

}



static int usb3503_i2c_resume(struct device *dev)

static int usb3503_resume(struct usb3503 *hub)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct usb3503 *hub = i2c_get_clientdata(client);



	if (hub->clk)

		clk_prepare_enable(hub->clk);
@@ -380,11 +374,38 @@ static int usb3503_i2c_resume(struct device *dev) 


	return 0;

}



static int usb3503_i2c_suspend(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);



	return usb3503_suspend(i2c_get_clientdata(client));

}



static int usb3503_i2c_resume(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);



	return usb3503_resume(i2c_get_clientdata(client));

}



static int usb3503_platform_suspend(struct device *dev)

{

	return usb3503_suspend(dev_get_drvdata(dev));

}



static int usb3503_platform_resume(struct device *dev)

{

	return usb3503_resume(dev_get_drvdata(dev));

}

#endif



static SIMPLE_DEV_PM_OPS(usb3503_i2c_pm_ops, usb3503_i2c_suspend,

		usb3503_i2c_resume);



static SIMPLE_DEV_PM_OPS(usb3503_platform_pm_ops, usb3503_platform_suspend,

		usb3503_platform_resume);



static const struct i2c_device_id usb3503_id[] = {

	{ USB3503_I2C_NAME, 0 },

	{ }
@@ -415,6 +436,7 @@ static struct platform_driver usb3503_platform_driver = { 
	.driver = {

		.name = USB3503_I2C_NAME,

		.of_match_table = of_match_ptr(usb3503_of_match),

		.pm = &usb3503_platform_pm_ops,

	},

	.probe		= usb3503_platform_probe,

	.remove		= usb3503_platform_remove,