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grf.txt
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power_domain.txt
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Editing: power_domain.txt
* Rockchip Power Domains Rockchip processors include support for multiple power domains which can be powered up/down by software based on different application scenes to save power. Required properties for power domain controller: - compatible: Should be one of the following. "rockchip,px30-power-controller" - for PX30 SoCs. "rockchip,rk3036-power-controller" - for RK3036 SoCs. "rockchip,rk3066-power-controller" - for RK3066 SoCs. "rockchip,rk3128-power-controller" - for RK3128 SoCs. "rockchip,rk3188-power-controller" - for RK3188 SoCs. "rockchip,rk3228-power-controller" - for RK3228 SoCs. "rockchip,rk3288-power-controller" - for RK3288 SoCs. "rockchip,rk3328-power-controller" - for RK3328 SoCs. "rockchip,rk3366-power-controller" - for RK3366 SoCs. "rockchip,rk3368-power-controller" - for RK3368 SoCs. "rockchip,rk3399-power-controller" - for RK3399 SoCs. - #power-domain-cells: Number of cells in a power-domain specifier. Should be 1 for multiple PM domains. - #address-cells: Should be 1. - #size-cells: Should be 0. Required properties for power domain sub nodes: - reg: index of the power domain, should use macros in: "include/dt-bindings/power/px30-power.h" - for PX30 type power domain. "include/dt-bindings/power/rk3036-power.h" - for RK3036 type power domain. "include/dt-bindings/power/rk3066-power.h" - for RK3066 type power domain. "include/dt-bindings/power/rk3128-power.h" - for RK3128 type power domain. "include/dt-bindings/power/rk3188-power.h" - for RK3188 type power domain. "include/dt-bindings/power/rk3228-power.h" - for RK3228 type power domain. "include/dt-bindings/power/rk3288-power.h" - for RK3288 type power domain. "include/dt-bindings/power/rk3328-power.h" - for RK3328 type power domain. "include/dt-bindings/power/rk3366-power.h" - for RK3366 type power domain. "include/dt-bindings/power/rk3368-power.h" - for RK3368 type power domain. "include/dt-bindings/power/rk3399-power.h" - for RK3399 type power domain. - clocks (optional): phandles to clocks which need to be enabled while power domain switches state. - pm_qos (optional): phandles to qos blocks which need to be saved and restored while power domain switches state. Qos Example: qos_gpu: qos_gpu@ffaf0000 { compatible ="syscon"; reg = <0x0 0xffaf0000 0x0 0x20>; }; Example: power: power-controller { compatible = "rockchip,rk3288-power-controller"; #power-domain-cells = <1>; #address-cells = <1>; #size-cells = <0>; pd_gpu { reg = <RK3288_PD_GPU>; clocks = <&cru ACLK_GPU>; pm_qos = <&qos_gpu>; }; }; power: power-controller { compatible = "rockchip,rk3368-power-controller"; #power-domain-cells = <1>; #address-cells = <1>; #size-cells = <0>; pd_gpu_1 { reg = <RK3368_PD_GPU_1>; clocks = <&cru ACLK_GPU_CFG>; }; }; Example 2: power: power-controller { compatible = "rockchip,rk3399-power-controller"; #power-domain-cells = <1>; #address-cells = <1>; #size-cells = <0>; pd_vio { #address-cells = <1>; #size-cells = <0>; reg = <RK3399_PD_VIO>; pd_vo { #address-cells = <1>; #size-cells = <0>; reg = <RK3399_PD_VO>; pd_vopb { reg = <RK3399_PD_VOPB>; }; pd_vopl { reg = <RK3399_PD_VOPL>; }; }; }; }; Node of a device using power domains must have a power-domains property, containing a phandle to the power device node and an index specifying which power domain to use. The index should use macros in: "include/dt-bindings/power/px30-power.h" - for px30 type power domain. "include/dt-bindings/power/rk3036-power.h" - for rk3036 type power domain. "include/dt-bindings/power/rk3128-power.h" - for rk3128 type power domain. "include/dt-bindings/power/rk3128-power.h" - for rk3228 type power domain. "include/dt-bindings/power/rk3288-power.h" - for rk3288 type power domain. "include/dt-bindings/power/rk3328-power.h" - for rk3328 type power domain. "include/dt-bindings/power/rk3366-power.h" - for rk3366 type power domain. "include/dt-bindings/power/rk3368-power.h" - for rk3368 type power domain. "include/dt-bindings/power/rk3399-power.h" - for rk3399 type power domain. Example of the node using power domain: node { /* ... */ power-domains = <&power RK3288_PD_GPU>; /* ... */ }; node { /* ... */ power-domains = <&power RK3368_PD_GPU_1>; /* ... */ }; node { /* ... */ power-domains = <&power RK3399_PD_VOPB>; /* ... */ };
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