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usb: usb251xb: add pm_ops

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Currently the driver don't support pm_ops. These ops are not necessary
if the supply isn't switchable (always on). This assumptions seems to be
wrong because no one needs a powered hub during suspend-to-ram/disk.

So adding simple_dev_pm_ops to be able to switch off the hub during
suspend and to restore the config after a resume operation.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Acked-by: Richard Leitner <richard.leitner@skidata.com>
Link: https://lore.kernel.org/r/20190917144449.32739-5-m.felsch@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marco Felsch 2019-09-17 16:44:49 +02:00 committed by Greg Kroah-Hartman
parent a9bab25556
commit 905eccc6a5
1 changed files with 24 additions and 0 deletions
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24
drivers/usb/misc/usb251xb.c
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@ -701,6 +701,29 @@ static int usb251xb_i2c_probe(struct i2c_client *i2c,
return usb251xb_probe(hub);
}
static int __maybe_unused usb251xb_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct usb251xb *hub = i2c_get_clientdata(client);
return regulator_disable(hub->vdd);
}
static int __maybe_unused usb251xb_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct usb251xb *hub = i2c_get_clientdata(client);
int err;
err = regulator_enable(hub->vdd);
if (err)
return err;
return usb251xb_connect(hub);
}
static SIMPLE_DEV_PM_OPS(usb251xb_pm_ops, usb251xb_suspend, usb251xb_resume);
static const struct i2c_device_id usb251xb_id[] = {
{ "usb2512b", 0 },
{ "usb2512bi", 0 },
@ -718,6 +741,7 @@ static struct i2c_driver usb251xb_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = of_match_ptr(usb251xb_of_match),
.pm = &usb251xb_pm_ops,
},
.probe = usb251xb_i2c_probe,
.id_table = usb251xb_id,