From 122f06e60f90a43d9b2fb30662af688dfb759379 Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I Date: Mon, 3 Mar 2014 17:08:10 +0530 Subject: [PATCH] usb: dwc3: core: support optional PHYs Since PHYs for dwc3 is optional (not all SoCs having PHYs for DWC3 should be programmed), do not return from probe if the USB PHY library returns -ENODEV as that indicates the platform does not have a programmable PHY. While this can be considered as a temporary fix, a long term solution would be to add 'nop' PHY for platforms that does not have programmable PHY. Signed-off-by: Kishon Vijay Abraham I Reviewed-by: Roger Quadros Signed-off-by: Felipe Balbi --- 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 8c627c9a5130..c89570cc0689 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -534,32 +534,26 @@ 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; -- 2.20.1