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