phy-sun4i-usb: Warn when external vbus is detected

Warn when external vbus is detected when we're trying to enable our
own vbus.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
index af42f8d40ac10f483c55bad6556769c1deb9c8ed..03f030b491d609823c21b50f6ed9d814f26acd33 100644 (file)
--- a/drivers/phy/phy-sun4i-usb.c
+++ b/drivers/phy/phy-sun4i-usb.c
@@ -390,8 +390,10 @@ static int sun4i_usb_phy_power_on(struct phy *_phy)
 
        /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
        if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
-                               data->vbus_det)
+                               data->vbus_det) {
+               dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n");
                return 0;
+       }
 
        ret = regulator_enable(phy->vbus);
        if (ret)