From e0f681c2c11a25b76626cea77deb819a4754375d Mon Sep 17 00:00:00 2001 From: Fabrice Gasnier Date: Wed, 5 Sep 2018 13:40:02 +0200 Subject: usb: dwc2: get optional vbus-supply regulator once Move devm_regulator_get_optional() call to probe routine. This avoids 'vbus-supply' regulator to be requested lots of times, upon each call to dwc2_vbus_supply_init(), e.g. like with runtime pm. Fixes: 531ef5ebea96 ("usb: dwc2: add support for host mode external vbus supply") Tested-by: Artur Petrosyan Acked-by: Minas Harutyunyan Signed-off-by: Fabrice Gasnier Signed-off-by: Amelie Delaunay Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/platform.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/usb/dwc2/platform.c') diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index 577642895b57..c0b64d483552 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -432,6 +432,14 @@ static int dwc2_driver_probe(struct platform_device *dev) if (retval) return retval; + hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus"); + if (IS_ERR(hsotg->vbus_supply)) { + retval = PTR_ERR(hsotg->vbus_supply); + hsotg->vbus_supply = NULL; + if (retval != -ENODEV) + return retval; + } + retval = dwc2_lowlevel_hw_enable(hsotg); if (retval) return retval; -- cgit v1.2.1