1 * Rockchip Power Domains
3 Rockchip processors include support for multiple power domains which can be
4 powered up/down by software based on different application scenes to save power.
6 Required properties for power domain controller:
7 - compatible: Should be one of the following.
8 "rockchip,rk3288-power-controller" - for RK3288 SoCs.
9 "rockchip,rk3366-power-controller" - for RK3366 SoCs.
10 "rockchip,rk3368-power-controller" - for RK3368 SoCs.
11 "rockchip,rk3399-power-controller" - for RK3399 SoCs.
12 - #power-domain-cells: Number of cells in a power-domain specifier.
13 Should be 1 for multiple PM domains.
14 - #address-cells: Should be 1.
15 - #size-cells: Should be 0.
17 Required properties for power domain sub nodes:
18 - reg: index of the power domain, should use macros in:
19 "include/dt-bindings/power/rk3288-power.h" - for RK3288 type power domain.
20 "include/dt-bindings/power/rk3366-power.h" - for RK3366 type power domain.
21 "include/dt-bindings/power/rk3368-power.h" - for RK3368 type power domain.
22 "include/dt-bindings/power/rk3399-power.h" - for RK3399 type power domain.
23 - clocks (optional): phandles to clocks which need to be enabled while power domain
25 - pm_qos (optional): phandles to qos blocks which need to be saved and restored
26 while power domain switches state.
30 qos_gpu: qos_gpu@ffaf0000 {
32 reg = <0x0 0xffaf0000 0x0 0x20>;
37 power: power-controller {
38 compatible = "rockchip,rk3288-power-controller";
39 #power-domain-cells = <1>;
44 reg = <RK3288_PD_GPU>;
45 clocks = <&cru ACLK_GPU>;
50 power: power-controller {
51 compatible = "rockchip,rk3368-power-controller";
52 #power-domain-cells = <1>;
57 reg = <RK3368_PD_GPU_1>;
58 clocks = <&cru ACLK_GPU_CFG>;
63 power: power-controller {
64 compatible = "rockchip,rk3399-power-controller";
65 #power-domain-cells = <1>;
72 reg = <RK3399_PD_VIO>;
80 reg = <RK3399_PD_VOPB>;
84 reg = <RK3399_PD_VOPL>;
90 Node of a device using power domains must have a power-domains property,
91 containing a phandle to the power device node and an index specifying which
93 The index should use macros in:
94 "include/dt-bindings/power/rk3288-power.h" - for rk3288 type power domain.
95 "include/dt-bindings/power/rk3366-power.h" - for rk3366 type power domain.
96 "include/dt-bindings/power/rk3368-power.h" - for rk3368 type power domain.
97 "include/dt-bindings/power/rk3399-power.h" - for rk3399 type power domain.
99 Example of the node using power domain:
103 power-domains = <&power RK3288_PD_GPU>;
109 power-domains = <&power RK3368_PD_GPU_1>;
115 power-domains = <&power RK3399_PD_VOPB>;