linux-kernel - Re: [PATCH v12 6/7] dt-bindings: media: wave5: add yaml devicetree bindings

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Date:   Sun, 17 Sep 2023 09:56:45 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sebastian Fricke <sebastian.fricke@...labora.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Nas Chung <nas.chung@...psnmedia.com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jackson Lee <jackson.lee@...psnmedia.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        NXP Linux Team <linux-imx@....com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Conor Dooley <conor+dt@...nel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Robert Beckett <bob.beckett@...labora.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>
Subject: Re: [PATCH v12 6/7] dt-bindings: media: wave5: add yaml devicetree
 bindings

On 15/09/2023 23:11, Sebastian Fricke wrote:
> From: Robert Beckett <bob.beckett@...labora.com>
> 
> Add bindings for the wave5 chips&media codec driver
> 
> Signed-off-by: Robert Beckett <bob.beckett@...labora.com>
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
> Signed-off-by: Sebastian Fricke <sebastian.fricke@...labora.com>

So this is v12 and still no tested?

A nit, subject: drop second/last, redundant "yaml devicetree indings".
The "dt-bindings" prefix is already stating that these are bindings.
Basically three words bringing zero information.

> ---
>  .../devicetree/bindings/media/cnm,wave5.yaml       | 66 ++++++++++++++++++++++
>  1 file changed, 66 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/cnm,wave5.yaml b/Documentation/devicetree/bindings/media/cnm,wave5.yaml
> new file mode 100644
> index 000000000000..b8f383621805
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/cnm,wave5.yaml
> @@ -0,0 +1,66 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/cnm,wave5.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Chips&Media Wave 5 Series multi-standard codec IP
> +
> +maintainers:
> +  - Nas Chung <nas.chung@...psnmedia.com>
> +  - Jackson Lee <jackson.lee@...psnmedia.com>
> +
> +description: |-

Do not need '|-' unless you need to preserve formatting.

> +  The Chips&Media WAVE codec IP is a multi format video encoder/decoder
> +
> +properties:
> +  compatible:
> +    enum:
> +        - cnm,cm521c-vpu

It does not look like you tested the bindings, at least after quick
look. Please run `make dt_binding_check` (see
Documentation/devicetree/bindings/writing-schema.rst for instructions).
Maybe you need to update your dtschema and yamllint.

Missing blank line

> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: VCODEC clock
> +
> +  clock-names:
> +    items:
> +      - const: vcodec

Drop clock-names, not really useful for one entry.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  sram:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +

Drop blank line

> +    description:
> +      The VPU uses the SRAM to store some of the reference data instead of
> +      storing it on DMA memory. It is mainly used for the purpose of reducing
> +      bandwidth.
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts

Keep the same order as listed in properties:

> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false
> +

Best regards,
Krzysztof