linux-kernel - Re: [PATCH] Avoid error message on rk3328 use

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Date: Sat, 13 Apr 2024 17:09:33 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Linus Walleij <linus.walleij@...aro.org>,
 Bartosz Golaszewski <brgl@...ev.pl>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
 Johan Jonker <jbx6244@...il.com>, Dragan Simic <dsimic@...jaro.org>,
 shironeko <shironeko@...aguri.club>, Etienne Buira <etienne.buira@...e.fr>,
 Jonas Karlman <jonas@...boo.se>, linux-gpio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Avoid error message on rk3328 use

On 13/04/2024 15:56, Etienne Buira wrote:
> rockchip,rk3328-grf-gpio is handled as syscon, but syscon mandates

syscon does not need such property. I see it in gpio-syscon, but not in
syscon.

> presence of gpio,syscon-dev node (or it will call dev_err() when probed).
> Correct rk3328.dtsi and related documentation to follow syscon's
> expectations.

No, look at gpio-syscon driver. Parent is used.


> 
> Signed-off-by: Etienne Buira <etienne.buira@...e.fr>
> ---
>  .../devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.yaml      | 2 ++

Please run scripts/checkpatch.pl and fix reported warnings. Then please
run `scripts/checkpatch.pl --strict` and (probably) fix more warnings.
Some warnings can be ignored, especially from --strict run, but the code
here looks like it needs a fix. Feel free to get in touch if the warning
is not clear.

>  arch/arm64/boot/dts/rockchip/rk3328.dtsi                        | 1 +
>  2 files changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.yaml b/Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.yaml
> index d8cce73ea0ae..2c878e7db900 100644
> --- a/Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.yaml
> +++ b/Documentation/devicetree/bindings/gpio/rockchip,rk3328-grf-gpio.yaml
> @@ -38,6 +38,7 @@ required:
>    - compatible
>    - gpio-controller
>    - "#gpio-cells"
> +  - gpio,syscon-dev

No, not needed. And also incomplete - where is the property defined?

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.



Best regards,
Krzysztof