Re: [RFC PATCH v2 04/19] dt-bindings: firmware: thead,th1520: Add support for firmware node

[Krzysztof Kozlowski <krzk@kernel.org>]

On 23/12/2024 13:55, Michal Wilczynski wrote:
> The kernel communicates with the E902 core through the mailbox
> transport using AON firmware protocol. Add dt-bindings to document it
> the dt node.
> 
> Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
> ---
>  .../bindings/firmware/thead,th1520-aon.yaml   | 59 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
> 
> diff --git a/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml b/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
> new file mode 100644
> index 000000000000..ca4c276766a3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
> @@ -0,0 +1,59 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/firmware/thead,th1520-aon.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: T-HEAD TH1520 AON (Always-On) Firmware Node

Drop "Node", unless this is somehow name of device (not a DT node).

> +
> +description: |
> +  The Always-On (AON) subsystem in the TH1520 SoC is responsible for managing
> +  low-power states, system wakeup events, and power management tasks. It is
> +  designed to operate independently in a dedicated power domain, allowing it to
> +  remain functional even during the SoC's deep sleep states.
> +
> +  At the heart of the AON subsystem is the E902, a low-power core that executes
> +  firmware responsible for coordinating tasks such as power domain control,
> +  clock management, and system wakeup signaling. Communication between the main
> +  SoC and the AON subsystem is handled through a mailbox interface, which
> +  enables message-based interactions with the AON firmware.
> +
> +maintainers:
> +  - Michal Wilczynski <m.wilczynski@samsung.com>
> +
> +properties:
> +  compatible:
> +    const: thead,th1520-aon
> +
> +  mboxes:
> +    maxItems: 1
> +
> +  mbox-names:
> +    items:
> +      - const: aon
> +
> +  power-domain:
> +    $ref: /schemas/power/thead,th1520-power.yaml#
> +    description: Subnode representing the hardware power domain of the AON subsystem.
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - mboxes
> +  - mbox-names

In all your bindings patches: "required" block goes before
additional/unevaluatedProperties. See also example-schema.

> +
> +examples:
> +  - |
> +    firmware {
> +        aon: aon {

Best regards,
Krzysztof