[PATCH v4 1/3] dt-binding: power: Add otg regulator binding

Tim Bird
2015-12-15T20:11:30Z

Add a binding for the regulator which controls the OTG chargepath switch.
The OTG switch gets its power from pm8941_5vs1, and that should be
expressed as a usb_otg_in-supply property in the DT node for the
charger driver. The regulator name is "otg-vbus".

Signed-off-by: Tim Bird <tim.bird@sonymobile.com>
---
Changes since v3
- switch supply name to have underscores instead of dashes
- (switched back to match the name used in data sheets)
- switch regulator node name to otg-vbus
Changes since v1
- switch supply name to have dashes instead of underscores
- remove superfluous DT explanations in the otg node description
---
.../devicetree/bindings/power_supply/qcom_smbb.txt | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/power_supply/qcom_smbb.txt b/Documentation/devicetree/bindings/power_supply/qcom_smbb.txt
index 65b88fa..06f8a5d 100644
--- a/Documentation/devicetree/bindings/power_supply/qcom_smbb.txt
+++ b/Documentation/devicetree/bindings/power_supply/qcom_smbb.txt
@@ -105,6 +105,22 @@ PROPERTIES
regulation must be done externally to fully comply with
the JEITA safety guidelines if this flag is set.

+- usb_otg_in-supply:
+ Usage: optional
+ Value type: <phandle>
+ Description: Reference to the regulator supplying power to the USB_OTG_IN
+ pin.
+
+child nodes:
+- otg-vbus:
+ Usage: optional
+ Description: This node defines a regulator used to control the direction
+ of VBUS voltage - specifically: whether to supply voltage
+ to VBUS for host mode operation of the OTG port, or allow
+ input voltage from external VBUS for charging. In the
+ hardware, the supply for this regulator comes from
+ usb_otg_in-supply.
+
EXAMPLE
charger@1000 {
compatible = "qcom,pm8941-charger";
@@ -128,4 +144,7 @@ charger@1000 {

qcom,fast-charge-current-limit = <1000000>;
qcom,dc-charge-current-limit = <1000000>;
+ usb_otg_in-supply = <&pm8941_5vs1>;
+
+ otg-vbus {};
};
--
2.6.3