diff options
| author | Joonyoung Shim <jy0922.shim@samsung.com> | 2014-07-10 14:22:34 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-11 18:14:10 -0700 |
| commit | ecdc071d02a052c30a3ba9cc574ae1544ea9be15 (patch) | |
| tree | 1c3e468333c6070acaee8c1fc7dad5538952123f /drivers/usb/misc/usb3503.c | |
| parent | 0e278b3408999d5bdce50bd0d7f97608483eebea (diff) | |
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: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/misc/usb3503.c')
| -rw-r--r-- | drivers/usb/misc/usb3503.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c index 652855b40289..47cb143716a1 100644 --- a/drivers/usb/misc/usb3503.c +++ b/drivers/usb/misc/usb3503.c @@ -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, |