usb: musb: da8xx: Set phy in OTG mode by default

The DA8xx OTG PHY has some issues when it is forced in host or
peripheral mode. Actually, most of the time, OTG is the best mode
because host or peripheral mode are only required for hardware that
miss some circuitry.
Init the PHY mode OTG mode by default.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index 373b61786fe00074783ae3e01749d780075fb220..e89708d839e504d772727a6be7b0623964e6f6d1 100644 (file)
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -343,6 +343,13 @@ static int da8xx_musb_set_mode(struct musb *musb, u8 musb_mode)
        struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);
        enum phy_mode phy_mode;
 
+       /*
+        * The PHY has some issues when it is forced in device or host mode.
+        * Unless the user request another mode, configure the PHY in OTG mode.
+        */
+       if (!musb->is_initialized)
+               return phy_set_mode(glue->phy, PHY_MODE_USB_OTG);
+
        switch (musb_mode) {
        case MUSB_HOST:         /* Force VBUS valid, ID = 0 */
                phy_mode = PHY_MODE_USB_HOST;