usb: core: Try generic PHY_MODE_USB_HOST if usb_phy_roothub_set_mode fails

Some PHYs do not support PHY_MODE_USB_HOST_SS, i.e. USB 3.0 or higher.
Fall back and try the more generic PHY_MODE_USB_HOST if it fails.

Fixes: b97a31348379 ("usb: core: comply to PHY framework")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 3189181bb628..975d7c1288e3 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2742,6 +2742,9 @@ int usb_add_hcd(struct usb_hcd *hcd,
                 retval = usb_phy_roothub_set_mode(hcd->phy_roothub,
                                                   PHY_MODE_USB_HOST_SS);
                 if (retval)
+                        retval = usb_phy_roothub_set_mode(hcd->phy_roothub,
+                                                          PHY_MODE_USB_HOST);
+                if (retval)
                         goto err_usb_phy_roothub_power_on;
 
                 retval = usb_phy_roothub_power_on(hcd->phy_roothub);