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authorThomas Abraham <thomas.abraham@linaro.org>2011-09-13 09:46:05 +0530
committerBen Dooks <ben-linux@fluff.org>2011-10-29 11:21:22 +0100
commit5a5f50802f5a31b9e15de8df40d5621af970a560 (patch)
tree352998103500f8744520fabb65d41db9d4700aea /Documentation/devicetree/bindings/i2c/samsung-i2c.txt
parent4fd81eb2d64295ab038a3ea9d44e0eac85a6648c (diff)
i2c-s3c2410: Add device tree support
Add device tree probe support for Samsung's s3c2410 i2c driver. Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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+* Samsung's I2C controller
+
+The Samsung's I2C controller is used to interface with I2C devices.
+
+Required properties:
+ - compatible: value should be either of the following.
+ (a) "samsung, s3c2410-i2c", for i2c compatible with s3c2410 i2c.
+ (b) "samsung, s3c2440-i2c", for i2c compatible with s3c2440 i2c.
+ - reg: physical base address of the controller and length of memory mapped
+ region.
+ - interrupts: interrupt number to the cpu.
+ - samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges.
+ - gpios: The order of the gpios should be the following: <SDA, SCL>.
+ The gpio specifier depends on the gpio controller.
+
+Optional properties:
+ - samsung,i2c-slave-addr: Slave address in multi-master enviroment. If not
+ specified, default value is 0.
+ - samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not
+ specified, the default value in Hz is 100000.
+
+Example:
+
+ i2c@13870000 {
+ compatible = "samsung,s3c2440-i2c";
+ reg = <0x13870000 0x100>;
+ interrupts = <345>;
+ samsung,i2c-sda-delay = <100>;
+ samsung,i2c-max-bus-freq = <100000>;
+ gpios = <&gpd1 2 0 /* SDA */
+ &gpd1 3 0 /* SCL */>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ wm8994@1a {
+ compatible = "wlf,wm8994";
+ reg = <0x1a>;
+ };
+ };