Update of /cvsroot/gc-linux/linux/Documentation/powerpc/dts-bindings/gpio
In directory ddv4jf1.ch3.sourceforge.com:/tmp/cvs-serv32158/Documentation/powerpc/dts-bindings/gpio
Added Files:
i2c.txt
Log Message:
[PATCH] i2c-gpio-of: GPIO-based I2C bitbang driver with OF bindings
From: Albert Herranz <alb...@ya...>
Date: Fri, 27 Feb 2009 21:30:15 +0100
Subject: [PATCH] i2c-gpio-of: GPIO-based I2C bitbang driver with OF bindings
Add a GPIO based I2C bitbang driver that supports device tree bindings.
Signed-off-by: Albert Herranz <alb...@ya...>
--- NEW FILE: i2c.txt ---
GPIO-based I2C
Required properties:
- compatible : should be "virtual,i2c-gpio".
- gpios : should specify GPIOs used for SDA and SCL lines, in that order.
- sda-is-open-drain : should be non-zero if SDA gpio is open-drain.
- scl-is-open-drain : should be non-zero if SCL gpio is open-drain.
- scl-is-output-only : should be non-zero if SCL is an output gpio only.
- udelay : signal toggle delay. SCL frequency is (500 / udelay) kHz
- timeout : clock stretching timeout in milliseconds.
Example:
gpio0: starlet-gpio@0d8000c0 {
compatible = "nintendo,starlet-gpio";
reg = <0d8000c0 4>;
gpio-controller;
#gpio-cells = <2>;
};
i2c-video {
#address-cells = <1>;
#size-cells = <0>;
compatible = "virtual,i2c-gpio";
gpios = <&gpio0 10 0 /* SDA line */
&gpio0 11 0 /* SCL line */
>;
sda-is-open-drain = <1>;
scl-is-open-drain = <1>;
scl-is-output-only = <1>;
udelay = <2>;
audio-video-encoder {
compatible = "nintendo,wii-ave-rvl";
reg = <70>;
};
};
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