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usb: dwc2: Return errors from PHY

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When searching for PHYs, any error was treated as if the PHY did not
exist or was not specified. Thus the probe function did not
correctly return error conditions such as -EPROBE_DEFER.

Fixed so that only a non-existing PHY is ignored and any other error
is returned.

Acked-by: Eric Anholt <eric@anholt.net>
Reported-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Stefan Wahren 2015-11-13 17:02:11 +00:00 committed by Felipe Balbi
parent d0464bcf12
commit 6c2dad6916
1 changed files with 33 additions and 6 deletions
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39
drivers/usb/dwc2/platform.c
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@ -212,14 +212,41 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
*/
hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy");
if (IS_ERR(hsotg->phy)) {
hsotg->phy = NULL;
hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);
if (IS_ERR(hsotg->uphy))
hsotg->uphy = NULL;
else
hsotg->plat = dev_get_platdata(hsotg->dev);
ret = PTR_ERR(hsotg->phy);
switch (ret) {
case -ENODEV:
case -ENOSYS:
hsotg->phy = NULL;
break;
case -EPROBE_DEFER:
return ret;
default:
dev_err(hsotg->dev, "error getting phy %d\n", ret);
return ret;
}
}
if (!hsotg->phy) {
hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);
if (IS_ERR(hsotg->uphy)) {
ret = PTR_ERR(hsotg->uphy);
switch (ret) {
case -ENODEV:
case -ENXIO:
hsotg->uphy = NULL;
break;
case -EPROBE_DEFER:
return ret;
default:
dev_err(hsotg->dev, "error getting usb phy %d\n",
ret);
return ret;
}
}
}
hsotg->plat = dev_get_platdata(hsotg->dev);
if (hsotg->phy) {
/*
* If using the generic PHY framework, check if the PHY bus