[PATCH 1/2] usb: dwc3: core: continue probing if usb phy library returns -ENODEV/-ENXIO

Kishon Vijay Abraham I
2014-01-21T10:11:38Z

Since PHYs for dwc3 is optional (not all SoCs that have DWC3 use PHYs),
do not return from probe if the USB PHY library returns -ENODEV as that
indicates the platform does not have PHY.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/usb/dwc3/core.c | 34 ++++++++++++++--------------------
1 file changed, 14 insertions(+), 20 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index a49217a..e009d4e 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -411,32 +411,26 @@ static int dwc3_probe(struct platform_device *pdev)

if (IS_ERR(dwc->usb2_phy)) {
ret = PTR_ERR(dwc->usb2_phy);
-
- /*
- * if -ENXIO is returned, it means PHY layer wasn't
- * enabled, so it makes no sense to return -EPROBE_DEFER
- * in that case, since no PHY driver will ever probe.
- */
- if (ret == -ENXIO)
+ if (ret == -ENXIO || ret == -ENODEV) {
+ dwc->usb2_phy = NULL;
+ } else if (ret == -EPROBE_DEFER) {
return ret;
-
- dev_err(dev, "no usb2 phy configured\n");
- return -EPROBE_DEFER;
+ } else {
+ dev_err(dev, "no usb2 phy configured\n");
+ return ret;
+ }
}

if (IS_ERR(dwc->usb3_phy)) {
ret = PTR_ERR(dwc->usb3_phy);
-
- /*
- * if -ENXIO is returned, it means PHY layer wasn't
- * enabled, so it makes no sense to return -EPROBE_DEFER
- * in that case, since no PHY driver will ever probe.
- */
- if (ret == -ENXIO)
+ if (ret == -ENXIO || ret == -ENODEV) {
+ dwc->usb3_phy = NULL;
+ } else if (ret == -EPROBE_DEFER) {
return ret;
-
- dev_err(dev, "no usb3 phy configured\n");
- return -EPROBE_DEFER;
+ } else {
+ dev_err(dev, "no usb3 phy configured\n");
+ return ret;
+ }
}

dwc->xhci_resources[0].start = res->start;
--
1.7.10.4