1* Rockchip Power Domains
2
3Rockchip processors include support for multiple power domains which can be
4powered up/down by software based on different application scenes to save power.
5
6Required properties for power domain controller:
7- compatible: Should be one of the following.
8	"rockchip,rk3288-power-controller" - for RK3288 SoCs.
9- #power-domain-cells: Number of cells in a power-domain specifier.
10	Should be 1 for multiple PM domains.
11- #address-cells: Should be 1.
12- #size-cells: Should be 0.
13
14Required properties for power domain sub nodes:
15- reg: index of the power domain, should use macros in:
16	"include/dt-bindings/power/rk3288-power.h" - for RK3288 type power domain.
17- clocks (optional): phandles to clocks which need to be enabled while power domain
18	switches state.
19
20Example:
21
22	power: power-controller {
23		compatible = "rockchip,rk3288-power-controller";
24		#power-domain-cells = <1>;
25		#address-cells = <1>;
26		#size-cells = <0>;
27
28		pd_gpu {
29			reg = <RK3288_PD_GPU>;
30			clocks = <&cru ACLK_GPU>;
31		};
32	};
33
34Node of a device using power domains must have a power-domains property,
35containing a phandle to the power device node and an index specifying which
36power domain to use.
37The index should use macros in:
38	"include/dt-bindings/power/rk3288-power.h" - for rk3288 type power domain.
39
40Example of the node using power domain:
41
42	node {
43		/* ... */
44		power-domains = <&power RK3288_PD_GPU>;
45		/* ... */
46	};
47