From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754534AbaCCLja (ORCPT ); Mon, 3 Mar 2014 06:39:30 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:53484 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753575AbaCCLjZ (ORCPT ); Mon, 3 Mar 2014 06:39:25 -0500 From: Kishon Vijay Abraham I To: , , , , , , , , , , CC: , , , , , , , , , , , , Subject: [PATCH v5 1/6] usb: dwc3: core: support optional PHYs Date: Mon, 3 Mar 2014 17:08:10 +0530 Message-ID: <1393846695-14644-2-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1393846695-14644-1-git-send-email-kishon@ti.com> References: <1393846695-14644-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 7d0cb34..225a4d6 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -529,32 +529,26 @@ 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; -- 1.7.9.5