linux-kernel - [PATCH 2/2] i2c: meson: add device tree bindings documentation

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Date:	Wed, 17 Sep 2014 00:07:57 +0200
From:	Beniamino Galvani <b.galvani@...il.com>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	Carlo Caione <carlo@...one.org>, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	Beniamino Galvani <b.galvani@...il.com>
Subject: [PATCH 2/2] i2c: meson: add device tree bindings documentation

Add device tree bindings documentation for the I2C controller
found in Amlogic Meson SoCs.

Signed-off-by: Beniamino Galvani <b.galvani@...il.com>
---
 .../devicetree/bindings/i2c/i2c-meson.txt          | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-meson.txt

diff --git a/Documentation/devicetree/bindings/i2c/i2c-meson.txt b/Documentation/devicetree/bindings/i2c/i2c-meson.txt
new file mode 100644
index 0000000..54a6c2c
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-meson.txt
@@ -0,0 +1,24 @@
+* Amlogic Meson I2C controller
+
+Required properties:
+ - compatible: must be "amlogic,meson6-i2c"
+ - reg: physical address and length of the device register set
+ - interrupts: a single interrupt specifier
+ - clocks: clock for the device
+ - #address-cells: should be <1>
+ - #size-cells: should be <0>
+
+Optional properties:
+- clock-frequency: the desired I2C bus clock frequency in Hz; in
+  absence of this property the default value is used (100 kHz).
+
+Example:
+
+	i2c@...08500 {
+		compatible = "amlogic,meson6-i2c";
+		reg = <0xc1108500 0x20>;
+		interrupts = <0 21 1>;
+		clocks = <&clk81>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
-- 
1.9.1

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