Re: [PATCH RFC 2/5] dt-bindings: power: Add Marvell PXA1908 domains

[Krzysztof Kozlowski <krzk@kernel.org>]

On Wed, Aug 06, 2025 at 07:33:21PM +0200, Duje Mihanović wrote:
> Add device tree bindings for Marvell PXA1908's power domains.
> 
> Signed-off-by: Duje Mihanović <duje@dujemihanovic.xyz>
> ---
>  .../power/marvell,pxa1908-power-controller.yaml    | 105 +++++++++++++++++++++
>  include/dt-bindings/power/marvell,pxa1908-power.h  |  17 ++++
>  2 files changed, 122 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/power/marvell,pxa1908-power-controller.yaml b/Documentation/devicetree/bindings/power/marvell,pxa1908-power-controller.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..1cf3a45d56cbb7b75f7204d656016a9a569da186
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/marvell,pxa1908-power-controller.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/marvell,pxa1908-power-controller.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell PXA1908 Power Domain Controller
> +
> +maintainers:
> +  - Duje Mihanović <duje@dujemihanovic.xyz>
> +
> +description: |
> +  The Marvell PXA1908 SoC includes multiple power domains which can be powered
> +  on/off to save power when different IP cores are not in use.
> +
> +properties:
> +  $nodename:
> +    pattern: '^power-controller$'
> +
> +  compatible:
> +    const: marvell,pxa1908-power-controller
> +
> +  '#power-domain-cells':
> +    const: 1

So this is power domain controller?

> +
> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 0
> +
> +patternProperties:
> +  "^power-domain@[0-9a-f]+$":
> +    type: object

And this is as well?

You duplicated them.

> +
> +    description: |
> +      Represents a power domain within the power controller node as documented
> +      in Documentation/devicetree/bindings/power/power-domain.yaml.

We do not represent individual power domains, just like we do not
represent individual clocks.



> +
> +    properties:
> +      reg:
> +        description: |
> +          Power domain index. Valid values are defined in:
> +              "include/dt-bindings/power/marvell,pxa1908-power.h"
> +        maxItems: 1

So no address space, thus this is not a separate device node.

> +
> +      clocks:
> +        description: |

Drop everywhere |

> +          A number of phandles to clocks that need to be enabled during domain
> +          power up.

This does not exist in your example, so it is just confusing.

> +
> +      '#power-domain-cells':
> +        const: 0
> +
> +    required:
> +      - reg
> +
> +    unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/power/marvell,pxa1908-power.h>
> +
> +    clock-controller@d4282800 {
> +      compatible = "marvell,pxa1908-apmu", "simple-mfd", "syscon";
> +      reg = <0xd4282800 0x400>;
> +      #clock-cells = <1>;
> +
> +      power-controller {
> +        compatible = "marvell,pxa1908-power-controller";

No address space, so this should be folded into the parent.

Best regards,
Krzysztof