USB: EHCI: Add support for overriding corner voltage levels for VDDCX
Currently ehci-msm2 driver does have support for voting corner voltages
for VDDCX. These corner voltage levels for VDDCX will change from platform
to platform. Hence add support for passing these corner voltage levels for
VDDCX from device tree file.
Change-Id: Id5d8c1d435721d6e2d1640298685b3f701fc3d6e
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
index 44ed2dc..e7eae76 100644
--- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
@@ -130,7 +130,8 @@
- interrupt-names : Required interrupt resource entries are:
HSUSB EHCI expects "core_irq" and optionally "async_irq".
- <supply-name>-supply: handle to the regulator device tree node
- Required "supply-name" is "HSUSB_VDDCX" "HSUSB_1p8-supply" "HSUSB_3p3-supply".
+ Required "supply-name" is either "hsusb_vdd_dig" or "HSUSB_VDDCX"
+ "HSUSB_1p8-supply" "HSUSB_3p3-supply".
- qcom,usb2-power-budget: maximum vbus power (in mA) that can be provided.
Optional properties :
@@ -138,6 +139,15 @@
- qcom,resume-gpio: if present then peripheral connected to usb controller
cannot wakeup from XO shutdown using in-band usb bus resume. Use resume
gpio to wakeup peripheral.
+- qcom,vdd-voltage-level: This property must be a list of five integer
+ values (no, 0.5vsuspend, 0.75suspend, min, max) where each value respresents
+ either a voltage in microvolts or a value corresponding to voltage corner.
+ First value represents value to vote when USB is not at all active, second
+ value represents value to vote when target is not connected to dock during low
+ power mode, third value represents vlaue to vote when target is connected to dock
+ and no peripheral connected over dock during low power mode, fourth value represents
+ minimum value to vote when USB is operational, fifth item represents maximum value
+ to vote for USB is operational.
Example MSM HSUSB EHCI controller device node :
ehci: qcom,ehci-host@f9a55000 {
@@ -145,11 +155,12 @@
reg = <0xf9a55000 0x400>;
interrupts = <0 134 0>, <0 140 0>;
interrupt-names = "core_irq", "async_irq";
- HSUSB_VDDCX-supply = <&pm8841_s2>;
+ hsusb_vdd_dig-supply = <&pm8841_s2_corner>;
HSUSB_1p8-supply = <&pm8941_l6>;
HSUSB_3p3-supply = <&pm8941_l24>;
qcom,usb2-enable-hsphy2;
qcom,usb2-power-budget = <500>;
+ qcom,vdd-voltage-level = <1 2 3 5 7>;
};
ANDROID USB: