linux-kernel - Re: [PATCH v3 2/3] dt-bindings: mailbox: Add thead,th1520-mailbox bindings

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Message-ID: <sknianfahozghrk6tdmcwxbbi6mixgw3y4vskzucga7r7hkfjz@yschcrxbbwm5>
Date: Wed, 9 Oct 2024 08:31:00 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Michal Wilczynski <m.wilczynski@...sung.com>
Cc: drew@...7.com, guoren@...nel.org, wefu@...hat.com, 
	jassisinghbrar@...il.com, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, 
	paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu, 
	m.szyprowski@...sung.com, linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/3] dt-bindings: mailbox: Add thead,th1520-mailbox
 bindings

On Tue, Oct 08, 2024 at 07:48:51PM +0200, Michal Wilczynski wrote:
> diff --git a/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml b/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml
> new file mode 100644
> index 000000000000..32c265f39c29
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml
> @@ -0,0 +1,81 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +

If there is going to be new bersion, drop blank line.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mailbox/thead,th1520-mbox.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: T-head TH1520 Mailbox Controller
> +
> +description:
> +  The T-head mailbox controller enables communication and coordination between
> +  cores within the SoC by passing messages (e.g., data, status, and control)
> +  through mailbox channels. It also allows one core to signal another processor
> +  using interrupts via the Interrupt Controller Unit (ICU).
> +
> +maintainers:
> +  - Michal Wilczynski <m.wilczynski@...sung.com>
> +
> +properties:
> +  compatible:
> +    const: thead,th1520-mbox
> +
> +  reg:
> +    items:
> +      - description: Mailbox local base address
> +      - description: Remote ICU 0 base address
> +      - description: Remote ICU 1 base address
> +      - description: Remote ICU 2 base address
> +
> +  reg-names:
> +    items:
> +      - const: local
> +      - const: remote-icu0
> +      - const: remote-icu1
> +      - const: remote-icu2
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  '#mbox-cells':
> +    const: 2
> +    description: |
> +      Specifies the number of cells needed to encode the mailbox specifier.
> +      The mailbox specifier consists of two cells:
> +        - Destination CPU ID.
> +        - Type, which can be one of the following:
> +            - 0:
> +                - TX & RX channels share the same channel.
> +                - Equipped with 7 info registers to facilitate data sharing.
> +                - Supports IRQ for signaling.
> +            - 1:
> +                - TX & RX operate as doorbell channels.
> +                - Does not have dedicated info registers.
> +                - Lacks ACK support.
> +
> +additionalProperties: false

If there is going to be new bersion, this goes after required:, just
like in example schema and all other bindings.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof