linux-kernel - [PATCH v5 1/2] dt-binding: power: Add otg regulator binding

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Date:   Mon, 17 Oct 2016 17:42:50 -0700
From:   Stephen Boyd <stephen.boyd@...aro.org>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     "Bird, Tim" <Tim.Bird@...ymobile.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <andy.gross@...aro.org>,
        Tim Bird <tim.bird@...ymobile.com>
Subject: [PATCH v5 1/2] dt-binding: power: Add otg regulator binding

From: "Bird, Tim" <Tim.Bird@...ymobile.com>

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@...ymobile.com>
Acked-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
Reviewed-by: Andy Gross <andy.gross@...aro.org>
Acked-by: Rob Herring <robh@...nel.org>
Signed-off-by: Stephen Boyd <stephen.boyd@...aro.org>
---
 .../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 65b88fac854b..06f8a5ddb68e 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@...0 {
        compatible = "qcom,pm8941-charger";
@@ -128,4 +144,7 @@ charger@...0 {
 
        qcom,fast-charge-current-limit = <1000000>;
        qcom,dc-charge-current-limit = <1000000>;
+       usb_otg_in-supply = <&pm8941_5vs1>;
+
+       otg-vbus {};
 };
-- 
2.10.0.297.gf6727b0