On Fri, 6 Mar 2026 at 10:29, André Draszik <andre.draszik@linaro.org> wrote:
>
> Add support for the Google gs101 version of the Exynos power domains. A
> new compatible is needed because register fields have changed and
> because power domain operations involve interfacing with the TrustZone
> protection control on newer Exynos SoCs.
>
> Power domains can also have a power supply linked to them, so add
> optional support for that, too. It is believed that all (existing)
> platforms could benefit from this, hence it's not being limited to
> gs101-pd.
>
> Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
> Signed-off-by: André Draszik <andre.draszik@linaro.org>
>
> ---
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
> v5:
> - add domain-supply and update commit message
>
> v4:
> - add new vendor property samsung,dtzpc
> - drop previous tags due to that
> ---
> .../devicetree/bindings/power/pd-samsung.yaml | 33 ++++++++++++++++++++--
> 1 file changed, 30 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/power/pd-samsung.yaml b/Documentation/devicetree/bindings/power/pd-samsung.yaml
> index 9c2c51133457..3f1a2dc17862 100644
> --- a/Documentation/devicetree/bindings/power/pd-samsung.yaml
> +++ b/Documentation/devicetree/bindings/power/pd-samsung.yaml
> @@ -13,12 +13,10 @@ description: |+
> Exynos processors include support for multiple power domains which are used
> to gate power to one or more peripherals on the processor.
>
> -allOf:
> - - $ref: power-domain.yaml#
> -
> properties:
> compatible:
> enum:
> + - google,gs101-pd
> - samsung,exynos4210-pd
> - samsung,exynos5433-pd
>
> @@ -33,6 +31,9 @@ properties:
> deprecated: true
> maxItems: 1
>
> + domain-supply:
> + description: domain regulator supply.
> +
> label:
> description:
> Human readable string with domain name. Will be visible in userspace
> @@ -44,11 +45,28 @@ properties:
> power-domains:
> maxItems: 1
>
> + samsung,dtzpc:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description:
> + Distributed TrustZone Protection Control (DTZPC) node.
> +
> required:
> - compatible
> - "#power-domain-cells"
> - reg
>
> +allOf:
> + - $ref: power-domain.yaml#
> + - if:
> + not:
> + properties:
> + compatible:
> + contains:
> + const: google,gs101-pd
> + then:
> + properties:
> + samsung,dtzpc: false
> +
> unevaluatedProperties: false
>
> examples:
> @@ -66,3 +84,12 @@ examples:
> #power-domain-cells = <0>;
> label = "MFC";
> };
> +
> + power-domain@2080 {
> + compatible = "google,gs101-pd";
> + reg = <0x2080 0x80>;
> + #power-domain-cells = <0>;
> + label = "hsi0";
> + domain-supply = <&ldo7m>;
> + samsung,dtzpc = <&dtzpc_hsi0>;
> + };
>
> --
> 2.53.0.473.g4a7958ca14-goog
>