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authorJoonyoung Shim <jy0922.shim@samsung.com>2014-07-10 01:22:34 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-11 21:14:10 -0400
commitecdc071d02a052c30a3ba9cc574ae1544ea9be15 (patch)
tree1c3e468333c6070acaee8c1fc7dad5538952123f /drivers/usb/misc/usb3503.c
parent0e278b3408999d5bdce50bd0d7f97608483eebea (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.c34
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)
149 149
150 case USB3503_MODE_STANDBY: 150 case USB3503_MODE_STANDBY:
151 usb3503_reset(hub, 0); 151 usb3503_reset(hub, 0);
152
153 hub->mode = mode;
154 dev_info(dev, "switched to STANDBY mode\n"); 152 dev_info(dev, "switched to STANDBY mode\n");
155 break; 153 break;
156 154
@@ -347,6 +345,37 @@ static int usb3503_platform_probe(struct platform_device *pdev)
347 return usb3503_probe(hub); 345 return usb3503_probe(hub);
348} 346}
349 347
348#ifdef CONFIG_PM_SLEEP
349static int usb3503_i2c_suspend(struct device *dev)
350{
351 struct i2c_client *client = to_i2c_client(dev);
352 struct usb3503 *hub = i2c_get_clientdata(client);
353
354 usb3503_switch_mode(hub, USB3503_MODE_STANDBY);
355
356 if (hub->clk)
357 clk_disable_unprepare(hub->clk);
358
359 return 0;
360}
361
362static int usb3503_i2c_resume(struct device *dev)
363{
364 struct i2c_client *client = to_i2c_client(dev);
365 struct usb3503 *hub = i2c_get_clientdata(client);
366
367 if (hub->clk)
368 clk_prepare_enable(hub->clk);
369
370 usb3503_switch_mode(hub, hub->mode);
371
372 return 0;
373}
374#endif
375
376static SIMPLE_DEV_PM_OPS(usb3503_i2c_pm_ops, usb3503_i2c_suspend,
377 usb3503_i2c_resume);
378
350static const struct i2c_device_id usb3503_id[] = { 379static const struct i2c_device_id usb3503_id[] = {
351 { USB3503_I2C_NAME, 0 }, 380 { USB3503_I2C_NAME, 0 },
352 { } 381 { }
@@ -365,6 +394,7 @@ MODULE_DEVICE_TABLE(of, usb3503_of_match);
365static struct i2c_driver usb3503_i2c_driver = { 394static struct i2c_driver usb3503_i2c_driver = {
366 .driver = { 395 .driver = {
367 .name = USB3503_I2C_NAME, 396 .name = USB3503_I2C_NAME,
397 .pm = &usb3503_i2c_pm_ops,
368 .of_match_table = of_match_ptr(usb3503_of_match), 398 .of_match_table = of_match_ptr(usb3503_of_match),
369 }, 399 },
370 .probe = usb3503_i2c_probe, 400 .probe = usb3503_i2c_probe,