linux-kernel - [PATCH 2/2] dt-bindings: extcon: Add support for cros-ec device

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Message-Id: <20170220151854.22859-3-enric.balletbo@collabora.com>
Date:   Mon, 20 Feb 2017 16:18:54 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Chanwoo Choi <cw00.choi@...sung.com>,
        Benson Leung <bleung@...omium.org>
Subject: [PATCH 2/2] dt-bindings: extcon: Add support for cros-ec device

From: Benson Leung <bleung@...omium.org>

This patch add documentation for binding of USB Type C cable detection
mechanism is using EXTCON subsystem. The device can detect the presence
of display out but it may also detect other external accessories when
external accessories is attached or detached.

Signed-off-by: Benson Leung <bleung@...omium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
---
 .../devicetree/bindings/extcon/extcon-cros-ec.txt  | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/extcon/extcon-cros-ec.txt

diff --git a/Documentation/devicetree/bindings/extcon/extcon-cros-ec.txt b/Documentation/devicetree/bindings/extcon/extcon-cros-ec.txt
new file mode 100644
index 0000000..3576869
--- /dev/null
+++ b/Documentation/devicetree/bindings/extcon/extcon-cros-ec.txt
@@ -0,0 +1,24 @@
+ChromeOS EC Type-C Extcon device
+
+On ChromeOS systems with USB Type C ports, the ChromeOS Embedded Controller is
+able to detect the state of external accessories such as display adapters
+or USB devices when said accessories are attached or detached.
+
+The node for this device must be under a cros-ec node like google,cros-ec-spi
+or google,cros-ec-i2c.
+
+Required properties:
+- compatible:		Should be "google,extcon-cros-ec".
+- google,usb-port-id:	Specifies the USB port ID to use.
+
+Example:
+	cros-ec@0 {
+		compatible = "google,cros-ec-i2c";
+
+		...
+
+		extcon {
+			compatible = "google,extcon-cros-ec";
+			google,usb-port-id = <0>;
+		};
+	}
-- 
2.9.3