usb: phy: msm: Manual PHY and LINK controller VBUS change notification

VBUS is not routed to USB PHY on recent Qualcomm platforms. USB controller
must see VBUS in order to pull-up DP when setting RS bit. Henc configure
USB PHY and LINK registers sense VBUS and enable manual pullup on D+ line.

Cc: Vamsi Krishna <vskrishn@codeaurora.org>
Cc: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

include/linux/usb/msm_hsusb.h

@@ -150,6 +150,9 @@ struct msm_usb_cable {
  * @chg_type: The type of charger attached.
  * @dcd_retires: The retry count used to track Data contact
  *               detection process.
+ * @manual_pullup: true if VBUS is not routed to USB controller/phy
+ *	and controller driver therefore enables pull-up explicitly before
+ *	starting controller using usbcmd run/stop bit.
  * @vbus: VBUS signal state trakining, using extcon framework
  * @id: ID signal state trakining, using extcon framework
  */
@@ -181,6 +184,8 @@ struct msm_otg {
 	struct reset_control *link_rst;
 	int vdd_levels[3];
 
+	bool manual_pullup;
+
 	struct msm_usb_cable vbus;
 	struct msm_usb_cable id;
 };