msm: otg: Add vbus sensing support
VBUS is not routed to USB PHY on recent platforms and USB controller
must see VBUS in order to pull-up DP when setting RS bit. Hence
configure USB PHY and LINK registers sense vbus and enable manual
pullup on D+ line.
Change-Id: I140f6de958fb18731dbedded40226192cd3a12f8
Signed-off-by: Vamsi Krishna <vskrishn@codeaurora.org>
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
index 6915827..859db3b 100644
--- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
@@ -61,6 +61,9 @@
- qcom,vdd-voltage-level: This property must be a list of three integer
values (no, min, max) where each value represents either a voltage
in microvolts or a value corresponding to voltage corner.
+- qcom,dp-manual-pullup: If present, vbus is not routed to USB controller/phy
+ and controller driver therefore enables pull-up explicitly before
+ starting controller using usbcmd run/stop bit.
Example HSUSB OTG controller device node :
usb@f9690000 {
@@ -85,7 +88,7 @@
HSUSB_1p8-supply = <&pm8226_l10>;
HSUSB_3p3-supply = <&pm8226_l20>;
qcom,vdd-voltage-level = <1 5 7>;
-
+ qcom,dp-manual-pullup;
qcom,msm_bus,name = "usb2";
qcom,msm_bus,num_cases = <2>;
qcom,msm_bus,active_only = <0>;