From ad1260e9fbf768d6bed227d9604ebee76a84aae3 Mon Sep 17 00:00:00 2001 From: Ramneek Mehresh Date: Mon, 16 Sep 2013 15:11:33 +0530 Subject: [PATCH] fsl/usb: Resolve PHY_CLK_VLD instability issue for ULPI phy For controller versions greater than 1.6, setting ULPI_PHY_CLK_SEL bit when USB_EN bit is already set causes instability issues with PHY_CLK_VLD bit. So USB_EN is set only for IP controller version below 1.6 before setting ULPI_PHY_CLK_SEL bit Signed-off-by: Ramneek Mehresh Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-fsl.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 4449f565d6c6..d3166e693dcb 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -130,7 +130,7 @@ static int usb_hcd_fsl_probe(const struct hc_driver *driver, } /* Enable USB controller, 83xx or 8536 */ - if (pdata->have_sysif_regs) + if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6) setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4); /* Don't need to set host mode here. It will be done by tdi_reset() */ @@ -232,15 +232,9 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd, case FSL_USB2_PHY_ULPI: if (pdata->have_sysif_regs && pdata->controller_ver) { /* controller version 1.6 or above */ + clrbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN); setbits32(non_ehci + FSL_SOC_USB_CTRL, - ULPI_PHY_CLK_SEL); - /* - * Due to controller issue of PHY_CLK_VALID in ULPI - * mode, we set USB_CTRL_USB_EN before checking - * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work. - */ - clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL, - UTMI_PHY_EN, USB_CTRL_USB_EN); + ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN); } portsc |= PORT_PTS_ULPI; break; -- 2.20.1