From mboxrd@z Thu Jan 1 00:00:00 1970 From: gautam.vivek@samsung.com (Vivek Gautam) Date: Wed, 9 Jul 2014 15:31:34 +0530 Subject: [PATCH v2 2/4] usb: host: xhci-plat: Get PHYs for xhci's hcds In-Reply-To: <1404900096-1721-1-git-send-email-gautam.vivek@samsung.com> References: <1404900096-1721-1-git-send-email-gautam.vivek@samsung.com> Message-ID: <1404900096-1721-3-git-send-email-gautam.vivek@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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 PHYs, viz. USB 2.0 type (UTMI+) and USB 3.0 type (PIPE3), provided by the parent - Synopsys's DWC3 controller Signed-off-by: Vivek Gautam --- drivers/usb/host/xhci-plat.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index 29d8adb..e50bd7d 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include "xhci.h" @@ -101,6 +102,7 @@ static int xhci_plat_probe(struct platform_device *pdev) struct clk *clk; int ret; int irq; + struct device *parent; if (usb_disabled()) return -ENODEV; @@ -165,6 +167,23 @@ static int xhci_plat_probe(struct platform_device *pdev) goto unmap_registers; } + parent = pdev->dev.parent; + /* + * Get possile USB 2.0 type PHY (UTMI+) registered by xhci's parent: + * Synopsys-dwc3 + */ + if (of_device_is_compatible(parent->of_node, "synopsys,dwc3") || + of_device_is_compatible(parent->of_node, "snps,dwc3")) { + hcd->gen_phy = devm_phy_get(&pdev->dev, "usb2-phy"); + if (IS_ERR(hcd->gen_phy)) { + ret = PTR_ERR(hcd->gen_phy); + if (ret != -ENOSYS && ret != -ENODEV) { + dev_err(&pdev->dev, "no usb2 phy configured\n"); + return ret; + } + } + } + ret = usb_add_hcd(hcd, irq, IRQF_SHARED); if (ret) goto disable_clk; @@ -191,6 +210,23 @@ static int xhci_plat_probe(struct platform_device *pdev) if (HCC_MAX_PSA(xhci->hcc_params) >= 4) xhci->shared_hcd->can_do_streams = 1; + /* + * Get possile USB 3.0 type PHY (PIPE3) registered by xhci's parent: + * Synopsys-dwc3 + */ + if (of_device_is_compatible(parent->of_node, "synopsys,dwc3") || + of_device_is_compatible(parent->of_node, "snps,dwc3")) { + xhci->shared_hcd->gen_phy = devm_phy_get(&pdev->dev, + "usb3-phy"); + if (IS_ERR(xhci->shared_hcd->gen_phy)) { + ret = PTR_ERR(xhci->shared_hcd->gen_phy); + if (ret != -ENOSYS && ret != -ENODEV) { + dev_err(&pdev->dev, "no usb3 phy configured\n"); + return ret; + } + } + } + ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); if (ret) goto put_usb3_hcd; -- 1.7.10.4