usb: host: xhci-rcar: Avoid long wait in xhci_reset()

The firmware of R-Car USB 3.0 host controller will control the reset.
So, if the xhci driver doesn't do firmware downloading (e.g. kernel
configuration is CONFIG_USB_XHCI_PLATFORM=y and CONFIG_USB_XHCI_RCAR
is not set), the reset of USB 3.0 host controller doesn't work
correctly. Then, the host controller will cause long wait in
xhci_reset() because the CMD_RESET bit of op_regs->command is not
cleared for 10 seconds.

So, this patch modifies the Kconfig to enable both CONFIG_USB_XHCI_PLATFORM
and CONFIG_USB_XHCI_RCAR.

Fixes: 4ac8918f3a7 (usb: host: xhci-plat: add support for the R-Car H2 and M2 xHCI controllers)
Cc: <stable@vger.kernel.org> # v3.17+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 3050b18b24477c805a1efc52446760c3a2458399..e9d4dde3e9b3dac1990d5dc58c8e6c2e196771a5 100644 (file)
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -35,6 +35,7 @@ config USB_XHCI_PCI
 
 config USB_XHCI_PLATFORM
        tristate "Generic xHCI driver for a platform device"
+       select USB_XHCI_RCAR if ARCH_RENESAS
        ---help---
          Adds an xHCI host driver for a generic platform device, which
          provides a memory space and an irq.
@@ -63,7 +64,7 @@ config USB_XHCI_MVEBU
 
 config USB_XHCI_RCAR
        tristate "xHCI support for Renesas R-Car SoCs"
-       select USB_XHCI_PLATFORM
+       depends on USB_XHCI_PLATFORM
        depends on ARCH_RENESAS || COMPILE_TEST
        ---help---
          Say 'Y' to enable the support for the xHCI host controller