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

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Message-ID: <1450209132-20185-1-git-send-email-tim.bird@sonymobile.com>
Date:	Tue, 15 Dec 2015 11:52:10 -0800
From:	Tim Bird <tim.bird@...ymobile.com>
To:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <sre@...nel.org>,
	<courtney.cavin@...ymobile.com>, <dbaryshkov@...il.com>,
	<dwmw2@...radead.org>, <agross@...eaurora.org>
CC:	<Bjorn.Andersson@...ymobile.com>, <devicetree@...r.kernel.org>,
	<linux-pm@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <tbird20d@...il.com>,
	<tim.bird@...ymobile.com>
Subject: [PATCH v4 1/3] dt-binding: power: Add otg regulator binding

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>
---
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@...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 {};
 };
-- 
2.6.3

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