diff options
author | Caesar Wang <wxt@rock-chips.com> | 2015-09-08 09:18:20 +0300 |
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committer | Heiko Stuebner <heiko@sntech.de> | 2015-10-06 10:47:32 +0300 |
commit | d64180fd5921be9db9cf63cc12c11086c444c0d0 (patch) | |
tree | d89093904c7fb56cee2b1475bfecf8151f338145 /Documentation/devicetree/bindings/soc | |
parent | 30c63a9db6052ef10355101bd4f30d2d7437a65d (diff) | |
download | linux-d64180fd5921be9db9cf63cc12c11086c444c0d0.tar.xz |
dt-bindings: add document of Rockchip power domains
This add the necessary binding documentation for the power domains
found on Rockchip SoCs.
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'Documentation/devicetree/bindings/soc')
-rw-r--r-- | Documentation/devicetree/bindings/soc/rockchip/power_domain.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt new file mode 100644 index 000000000000..4be34188afe4 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt @@ -0,0 +1,46 @@ +* 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,rk3288-power-controller" - for RK3288 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-domain/rk3288.h" - for RK3288 type power domain. +- clocks (optional): phandles to clocks which need to be enabled while power domain + switches state. + +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>; + }; + }; + +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-domain/rk3288.h" - for rk3288 type power domain. + +Example of the node using power domain: + + node { + /* ... */ + power-domains = <&power RK3288_PD_GPU>; + /* ... */ + }; |