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powerpc/usb: fix issue of CPU halt when missing USB PHY clock

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when missing USB PHY clock, kernel booting up will halt during USB
initialization. We should check USBGP[PHY_CLK_VALID] bit to avoid
CPU hang in this case.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shengzhou Liu
2012-02-02 11:23:14 +08:00
committed by Greg Kroah-Hartman
parent ed2833ac7e
commit 529febeee6
2 changed files with 10 additions and 2 deletions
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drivers/usb/host/ehci-fsl.h
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@@ -45,5 +45,6 @@
#define FSL_SOC_USB_PRICTRL 0x40c /* NOTE: big-endian */
#define FSL_SOC_USB_SICTRL 0x410 /* NOTE: big-endian */
#define FSL_SOC_USB_CTRL 0x500 /* NOTE: big-endian */
#define CTRL_PHY_CLK_VALID (1 << 17)
#define SNOOP_SIZE_2GB 0x1e
#endif /* _EHCI_FSL_H */