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Commit ecdc071d authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Greg Kroah-Hartman
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usb: usb3503: add PM functions 



The usb3503 needs to switch to standby mode while suspending and should
switch to hub mode when resumed. Also we can control clock on PM
function.

Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0e278b34

drivers/usb/misc/usb3503.c

+32 −2
Original line number Diff line number Diff line
@@ -149,8 +149,6 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) 


	case USB3503_MODE_STANDBY:

		usb3503_reset(hub, 0);



		hub->mode = mode;

		dev_info(dev, "switched to STANDBY mode\n");

		break;
@@ -347,6 +345,37 @@ static int usb3503_platform_probe(struct platform_device *pdev) 
	return usb3503_probe(hub);

}



#ifdef CONFIG_PM_SLEEP

static int usb3503_i2c_suspend(struct device *dev)

{

	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)

		clk_disable_unprepare(hub->clk);



	return 0;

}



static int usb3503_i2c_resume(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct usb3503 *hub = i2c_get_clientdata(client);



	if (hub->clk)

		clk_prepare_enable(hub->clk);



	usb3503_switch_mode(hub, hub->mode);



	return 0;

}

#endif



static SIMPLE_DEV_PM_OPS(usb3503_i2c_pm_ops, usb3503_i2c_suspend,

		usb3503_i2c_resume);



static const struct i2c_device_id usb3503_id[] = {

	{ USB3503_I2C_NAME, 0 },

	{ }
@@ -365,6 +394,7 @@ MODULE_DEVICE_TABLE(of, usb3503_of_match); 
static struct i2c_driver usb3503_i2c_driver = {

	.driver = {

		.name = USB3503_I2C_NAME,

		.pm = &usb3503_i2c_pm_ops,

		.of_match_table = of_match_ptr(usb3503_of_match),

	},

	.probe		= usb3503_i2c_probe,