[deliverable/linux.git] / Documentation / devicetree / bindings / arm / kirkwood.txt

Marvell Kirkwood Platforms Device Tree Bindings
-----------------------------------------------

Boards with a SoC of the Marvell Kirkwood
shall have the following property:

Required root node property:

compatible: must contain "marvell,kirkwood";

In order to support the kirkwood cpufreq driver, there must be a node
cpus/cpu@0 with three clocks, "cpu_clk", "ddrclk" and "powersave",
where the "powersave" clock is a gating clock used to switch the CPU
between the "cpu_clk" and the "ddrclk".

Example:

	cpus {
		#address-cells = <1>;
		#size-cells = <0>;

		cpu@0 {
		      device_type = "cpu";
		      compatible = "marvell,sheeva-88SV131";
		      clocks = <&core_clk 1>, <&core_clk 3>, <&gate_clk 11>;
		      clock-names = "cpu_clk", "ddrclk", "powersave";
		};
Commit	Line	Data
2a4bd9f0 AL	1	Marvell Kirkwood Platforms Device Tree Bindings
	2	-----------------------------------------------
	3
	4	Boards with a SoC of the Marvell Kirkwood
	5	shall have the following property:
	6
	7	Required root node property:
	8
	9	compatible: must contain "marvell,kirkwood";
	10
	11	In order to support the kirkwood cpufreq driver, there must be a node
	12	cpus/cpu@0 with three clocks, "cpu_clk", "ddrclk" and "powersave",
	13	where the "powersave" clock is a gating clock used to switch the CPU
	14	between the "cpu_clk" and the "ddrclk".
	15
	16	Example:
	17
	18	cpus {
	19	#address-cells = <1>;
	20	#size-cells = <0>;
	21
	22	cpu@0 {
	23	device_type = "cpu";
	24	compatible = "marvell,sheeva-88SV131";
	25	clocks = <&core_clk 1>, <&core_clk 3>, <&gate_clk 11>;
	26	clock-names = "cpu_clk", "ddrclk", "powersave";
	27	};