From 2f0e40aba1cafe3a834bfcbac8f1e704d496dab9 Mon Sep 17 00:00:00 2001 From: Valentin Longchamp Date: Wed, 20 Jan 2010 19:43:23 +0100 Subject: [PATCH] USB: fix occasional ULPI timeouts with ehci-mxc On various mxc boards, the intial ULPI reads resulted in a timeout which prevented the transceiver to be identified and thus the ehci device to be probed. Initializing the hardware lines connected to the transceiver (through pdata->init call) before actually enabling clocks and configuring registers in the devices fixes this problem. Signed-off-by: Valentin Longchamp Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-mxc.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c index 35c56f40bdbb..23cd917088b4 100644 --- a/drivers/usb/host/ehci-mxc.c +++ b/drivers/usb/host/ehci-mxc.c @@ -162,6 +162,17 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev) goto err_ioremap; } + /* call platform specific init function */ + if (pdata->init) { + ret = pdata->init(pdev); + if (ret) { + dev_err(dev, "platform init failed\n"); + goto err_init; + } + /* platforms need some time to settle changed IO settings */ + mdelay(10); + } + /* enable clocks */ priv->usbclk = clk_get(dev, "usb"); if (IS_ERR(priv->usbclk)) { @@ -192,18 +203,6 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev) if (ret < 0) goto err_init; - /* call platform specific init function */ - if (pdata->init) { - ret = pdata->init(pdev); - if (ret) { - dev_err(dev, "platform init failed\n"); - goto err_init; - } - } - - /* most platforms need some time to settle changed IO settings */ - mdelay(10); - /* Initialize the transceiver */ if (pdata->otg) { pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET; -- 2.11.0