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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>
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1 changed files with 3 additions and 2 deletions
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@ -264,8 +264,9 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
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if (pdata->have_sysif_regs && pdata->controller_ver &&
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(phy_mode == FSL_USB2_PHY_ULPI)) {
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/* check PHY_CLK_VALID to get phy clk valid */
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if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
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PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
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if (!(spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
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PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0) ||
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in_be32(non_ehci + FSL_SOC_USB_PRICTRL))) {
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printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
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return -EINVAL;
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}
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