From 3b5d3e6845bfe68777d069886b0d1cd5f23b9d58 Mon Sep 17 00:00:00 2001 From: Chris Ruehl Date: Fri, 10 Jan 2014 13:51:29 +0800 Subject: [PATCH] usb: chipidea: Fix Internal error: : 808 [#1] ARM related to STS flag * init the sts flag to 0 (missed) * fix write the real bit not sts value * Set PORTCS_STS and DEVLC_STS only if sts = 1 [Peter Chen: This one and the next patch fix the problem occurred imx27 and imx31, and imx27 and imx31 usb support are enabled until 3.14, so these two patches isn't needed for -stable] Signed-off-by: Chris Ruehl Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/core.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 0ead0b4a11e1..edeec3638684 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -236,7 +236,7 @@ static int hw_device_init(struct ci_hdrc *ci, void __iomem *base) static void hw_phymode_configure(struct ci_hdrc *ci) { - u32 portsc, lpm, sts; + u32 portsc, lpm, sts = 0; switch (ci->platdata->phy_mode) { case USBPHY_INTERFACE_MODE_UTMI: @@ -266,10 +266,12 @@ static void hw_phymode_configure(struct ci_hdrc *ci) if (ci->hw_bank.lpm) { hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm); - hw_write(ci, OP_DEVLC, DEVLC_STS, sts); + if (sts) + hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS); } else { hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc); - hw_write(ci, OP_PORTSC, PORTSC_STS, sts); + if (sts) + hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS); } }