[PATCH v3 1/7 RESEND] PM / Domains: Add a note about power domain subdomains

[Ulf Hansson]

On 14 January 2015 at 15:12, Marek Szyprowski <m.szyprowski at samsung.com> wrote:
> This patch adds a note on defining subdomains to generic PM domain
> binding documentation to let power domain providers use common approach
> for defining power domain hierarchy.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>

Reviewed-by: Ulf Hansson <ulf.hansson at linaro.org>

Kind regards
Uffe

> ---
> RESEND version:
> - fixed spelling mistakes, thanks go to Geert!
> ---
>  .../devicetree/bindings/power/power_domain.txt     | 29 ++++++++++++++++++++++
>  1 file changed, 29 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
> index 98c1667..eeea45b 100644
> --- a/Documentation/devicetree/bindings/power/power_domain.txt
> +++ b/Documentation/devicetree/bindings/power/power_domain.txt
> @@ -19,6 +19,16 @@ Required properties:
>     providing multiple PM domains (e.g. power controllers), but can be any value
>     as specified by device tree binding documentation of particular provider.
>
> +Optional properties:
> + - power-domains : A phandle and PM domain specifier as defined by bindings of
> +                   the power controller specified by phandle.
> +   Some power domains might be powered from another power domain (or have
> +   other hardware specific dependencies). For representing such dependency
> +   a standard PM domain consumer binding is used. When provided, all domains
> +   created by the given provider should be subdomains of the domain
> +   specified by this binding. More details about power domain specifier are
> +   available in the next section.
> +
>  Example:
>
>         power: power-controller at 12340000 {
> @@ -30,6 +40,25 @@ Example:
>  The node above defines a power controller that is a PM domain provider and
>  expects one cell as its phandle argument.
>
> +Example 2:
> +
> +       parent: power-controller at 12340000 {
> +               compatible = "foo,power-controller";
> +               reg = <0x12340000 0x1000>;
> +               #power-domain-cells = <1>;
> +       };
> +
> +       child: power-controller at 12340000 {
> +               compatible = "foo,power-controller";
> +               reg = <0x12341000 0x1000>;
> +               power-domains = <&parent 0>;
> +               #power-domain-cells = <1>;
> +       };
> +
> +The nodes above define two power controllers: 'parent' and 'child'.
> +Domains created by the 'child' power controller are subdomains of '0' power
> +domain provided by the 'parent' power controller.
> +
>  ==PM domain consumers==
>
>  Required properties:
> --
> 1.9.2
>