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i2c: cadence: Document device tree bindings

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Add device tree binding documentation for the Cadence I2C controller.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Soren Brinkmann 2014-04-04 14:27:54 -07:00 committed by Wolfram Sang
parent 9f02fba84b
commit 893f067772
1 changed files with 24 additions and 0 deletions
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Documentation/devicetree/bindings/i2c/i2c-cadence.txt Normal file
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Binding for the Cadence I2C controller
Required properties:
- reg: Physical base address and size of the controller's register area.
- compatible: Compatibility string. Must be 'cdns,i2c-r1p10'.
- clocks: Input clock specifier. Refer to common clock bindings.
- interrupts: Interrupt specifier. Refer to interrupt bindings.
- #address-cells: Should be 1.
- #size-cells: Should be 0.
Optional properties:
- clock-frequency: Desired operating frequency, in Hz, of the bus.
- clock-names: Input clock name, should be 'pclk'.
Example:
i2c@e0004000 {
compatible = "cdns,i2c-r1p10";
clocks = <&clkc 38>;
interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
reg = <0xe0004000 0x1000>;
clock-frequency = <400000>;
#address-cells = <1>;
#size-cells = <0>;
};