Commit ecdc071d authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Greg Kroah-Hartman

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
...@@ -149,8 +149,6 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode) ...@@ -149,8 +149,6 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode)
case USB3503_MODE_STANDBY: case USB3503_MODE_STANDBY:
usb3503_reset(hub, 0); usb3503_reset(hub, 0);
hub->mode = mode;
dev_info(dev, "switched to STANDBY mode\n"); dev_info(dev, "switched to STANDBY mode\n");
break; break;
...@@ -347,6 +345,37 @@ static int usb3503_platform_probe(struct platform_device *pdev) ...@@ -347,6 +345,37 @@ static int usb3503_platform_probe(struct platform_device *pdev)
return usb3503_probe(hub); 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[] = { static const struct i2c_device_id usb3503_id[] = {
{ USB3503_I2C_NAME, 0 }, { USB3503_I2C_NAME, 0 },
{ } { }
...@@ -365,6 +394,7 @@ MODULE_DEVICE_TABLE(of, usb3503_of_match); ...@@ -365,6 +394,7 @@ MODULE_DEVICE_TABLE(of, usb3503_of_match);
static struct i2c_driver usb3503_i2c_driver = { static struct i2c_driver usb3503_i2c_driver = {
.driver = { .driver = {
.name = USB3503_I2C_NAME, .name = USB3503_I2C_NAME,
.pm = &usb3503_i2c_pm_ops,
.of_match_table = of_match_ptr(usb3503_of_match), .of_match_table = of_match_ptr(usb3503_of_match),
}, },
.probe = usb3503_i2c_probe, .probe = usb3503_i2c_probe,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment