Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751664AbaFFMMq (ORCPT ); Fri, 6 Jun 2014 08:12:46 -0400 Received: from mail-pd0-f176.google.com ([209.85.192.176]:47206 "EHLO mail-pd0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751578AbaFFMMn (ORCPT ); Fri, 6 Jun 2014 08:12:43 -0400 From: Vivek Gautam To: linux-usb@vger.kernel.org, linux-samsung-soc@vger.kernel.org, gregkh@linuxfoundation.org, kishon@ti.com, mathias.nyman@intel.com Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kgene.kim@samsung.com, jwerner@chromium.org, Vivek Gautam Subject: [PATCH 2/4] usb: host: xhci-plat: Add support to get PHYs Date: Fri, 6 Jun 2014 17:42:13 +0530 Message-Id: <1402056736-12674-3-git-send-email-gautam.vivek@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1402056736-12674-1-git-send-email-gautam.vivek@samsung.com> References: <1402056736-12674-1-git-send-email-gautam.vivek@samsung.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The host controller by itself may sometimes need to handle PHY and/or calibrate some of the PHY settings to get full support out of the PHY controller. The PHY core provides a calibration funtionality now to do so. Therefore, facilitate getting the two possible PHY types for xhci controller, viz. USB 2.0 type (UTMI+) and USB 3.0 type (PIPE3) from its parent. Signed-off-by: Vivek Gautam --- drivers/usb/host/xhci-plat.c | 24 ++++++++++++++++++++++++ drivers/usb/host/xhci.h | 3 +++ 2 files changed, 27 insertions(+) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index 29d8adb..e7145b5 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "xhci.h" #include "xhci-mvebu.h" @@ -183,6 +184,29 @@ static int xhci_plat_probe(struct platform_device *pdev) } /* + * Get possile USB 2.0 type PHY (UTMI+), as well as + * USB 3.0 type PHY (PIPE3). + * The host controller may need to handle PHYs by itself too + * sometimes, so as to calibrate it based on the need. + */ + xhci->phy2_gen = devm_phy_get(&pdev->dev, "usb2-phy"); + if (IS_ERR(xhci->phy2_gen)) { + ret = PTR_ERR(xhci->phy2_gen); + if (ret != -ENOSYS && ret != -ENODEV) { + dev_err(&pdev->dev, "no usb2 phy configured\n"); + return ret; + } + } + xhci->phy3_gen = devm_phy_get(&pdev->dev, "usb3-phy"); + if (IS_ERR(xhci->phy3_gen)) { + ret = PTR_ERR(xhci->phy3_gen); + if (ret != -ENOSYS && ret != -ENODEV) { + dev_err(&pdev->dev, "no usb3 phy configured\n"); + return ret; + } + } + + /* * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset) * is called by usb_add_hcd(). */ diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 9ffecd5..453d89e 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1582,6 +1582,9 @@ struct xhci_hcd { u32 port_status_u0; /* Compliance Mode Timer Triggered every 2 seconds */ #define COMP_MODE_RCVRY_MSECS 2000 + /* phys for the controller */ + struct phy *phy2_gen; + struct phy *phy3_gen; }; /* convert between an HCD pointer and the corresponding EHCI_HCD */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/