On 24 April 2015 at 10:07, Caesar Wang <wxt@xxxxxxxxxxxxxx> wrote:
> This add the necessary binding documentation for the power domain
> found on Rockchip Socs.
>
> Signed-off-by: jinkun.hong <jinkun.hong@xxxxxxxxxxxxxx>
> Signed-off-by: Caesar Wang <wxt@xxxxxxxxxxxxxx>
> ---
>
> .../bindings/arm/rockchip/power_domain.txt | 48 ++++++++++++++++++++++
> 1 file changed, 48 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/rockchip/power_domain.txt
>
> diff --git a/Documentation/devicetree/bindings/arm/rockchip/power_domain.txt b/Documentation/devicetree/bindings/arm/rockchip/power_domain.txt
> new file mode 100644
> index 0000000..3e74e6d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/rockchip/power_domain.txt
> @@ -0,0 +1,48 @@
> +* 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 type power domain.
> +- #power-domain-cells: Number of cells in a power-domain specifier.
> + should be 1.
> +- rockchip,pmu: phandle referencing a syscon providing the pmu registers
> +- #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.
I can't find the above file, nor is it being adding in $subject patch.
Moreover, there are already
"include/dt-bindings/arm/ux500_pm_domains.h". I suppose we could move
that file into your suggested path, since it seems more generic?
> +- 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>;
> + rockchip,pmu = <&pmu>;
> + #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.
Same comment as above.
> +
> +Example of the node using power domain:
> +
> + node {
> + /* ... */
> + power-domains = <&power RK3288_PD_GPU>;
> + /* ... */
> + };
> --
> 1.9.1
>
>
Kind regards
Uffe
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