[PATCH v6 3/5] i2c: aspeed: added documentation for Aspeed I2C driver

[Benjamin Herrenschmidt]

On Mon, 2017-03-27 at 22:12 -0700, Brendan Higgins wrote:
> Added device tree binding documentation for Aspeed I2C busses.
> 
> Signed-off-by: Brendan Higgins <brendanhiggins at google.com>

> +	i2c0: i2c-bus at 40 {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		#interrupt-cells = <1>;
> +		reg = <0x40 0x40>;
> +		compatible = "aspeed,ast2400-i2c-bus";
> +		bus = <0>;
> +		clocks = <&clk_apb>;
> +		clock-frequency = <100000>;

For busses it's more traditional to make this "bus-frequency" but
that's a nit and Linux/fdt has not respected that tradition terribly
well. If you respin, it might be work changing.

The clock-frequency tends to be the frequency of the controller itself.

> +		status = "disabled";
> +		interrupts = <0>;
> +		interrupt-parent = <&i2c_ic>;
> +	};
> +};