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dt-bindings: add binding for rk3399 power domains

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Add binding documentation for the power domains
found on Rockchip RK3399 SoCs

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Elaine Zhang 2016-03-10 05:24:21 +08:00 committed by Heiko Stuebner
parent 51665c6e88
commit e6e270aecb
1 changed files with 37 additions and 0 deletions
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37
Documentation/devicetree/bindings/soc/rockchip/power_domain.txt
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@ -7,6 +7,7 @@ Required properties for power domain controller:
- compatible: Should be one of the following.
"rockchip,rk3288-power-controller" - for RK3288 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.
@ -16,6 +17,7 @@ Required properties for power domain sub nodes:
- reg: index of the power domain, should use macros in:
"include/dt-bindings/power/rk3288-power.h" - for RK3288 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.
@ -45,12 +47,41 @@ Example:
};
};
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/rk3288-power.h" - for rk3288 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:
@ -65,3 +96,9 @@ Example of the node using power domain:
power-domains = <&power RK3368_PD_GPU_1>;
/* ... */
};
node {
/* ... */
power-domains = <&power RK3399_PD_VOPB>;
/* ... */
};