USB: fsl/ehci: fix failure of checking PHY_CLK_VALID during reinitialization

In case of usb phy reinitialization:
e.g. insmod usb-module(usb works well) -> rmmod usb-module -> insmod usb-module
It found the PHY_CLK_VALID bit didn't work if it's not with the power-on reset.
So we just check PHY_CLK_VALID bit during the stage with POR, this can be met
by the tricky of checking FSL_SOC_USB_PRICTRL register.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index d3166e693dcb..f2407b2e8a99 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -264,8 +264,9 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
         if (pdata->have_sysif_regs && pdata->controller_ver &&
             (phy_mode == FSL_USB2_PHY_ULPI)) {
                 /* check PHY_CLK_VALID to get phy clk valid */
-                if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
-                                PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
+                if (!(spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
+                                PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0) ||
+                                in_be32(non_ehci + FSL_SOC_USB_PRICTRL))) {
                         printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
                         return -EINVAL;
                 }