linux-kernel - [RFC PATCH 6/6] extcon-gpio: Describe possible properties to support multi-type cables

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Message-Id: <1377836978-24082-7-git-send-email-linux@roeck-us.net>
Date:	Thu, 29 Aug 2013 21:29:38 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	linux-kernel@...r.kernel.org
Cc:	devicetree@...r.kernel.org, Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Grant Likely <grant.likely@...aro.org>,
	Guenter Roeck <linux@...ck-us.net>
Subject: [RFC PATCH 6/6] extcon-gpio: Describe possible properties to support multi-type cables

This is purely a possible description and an RFC; there is no code (yet).

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 .../devicetree/bindings/extcon/extcon-gpio         |   26 ++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Documentation/devicetree/bindings/extcon/extcon-gpio b/Documentation/devicetree/bindings/extcon/extcon-gpio
index 091ddc6..5836ac2 100644
--- a/Documentation/devicetree/bindings/extcon/extcon-gpio
+++ b/Documentation/devicetree/bindings/extcon/extcon-gpio
@@ -21,3 +21,29 @@ Example node:
 		state-on = "connected";
 		state-on = "disconnected";
 	};
+
+---
+TBD: Add support for multiple connectors
+
+An example node with multiple connectors might look as follows.
+
+	some-connector {
+		#size-cells = <1>;
+		compatible = "gpio-connector";
+		presence-detect-gpios = <&gpio1 7 1>;
+		id-gpios = <&gpio1 8 0>;
+		debounce-interval = <1>;
+		state-on = "connected";
+		state-on = "disconnected";
+
+		USB {
+			reg = <0>;
+		};
+		USB-Host {
+			reg = <1>;
+		};
+	};
+
+This describes a cable with a (low-active) presence detect pin and an ID pin.
+If the value returned by the ID pin is 0, the connected cable type is "USB".
+If the value is 1, the connected cable type is "USB-Host".
-- 
1.7.9.7

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