linux-kernel - Re: [PATCH] dt-bindings: pinctrl: spacemit: fix drive-strength check warning

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Message-ID: <20260130-outsmart-ether-73a7927b4c95@spud>
Date: Fri, 30 Jan 2026 17:11:27 +0000
From: Conor Dooley <conor@...nel.org>
To: Yixun Lan <dlan@...nel.org>
Cc: Linus Walleij <linusw@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <pjw@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: pinctrl: spacemit: fix drive-strength check
 warning

On Fri, Jan 30, 2026 at 07:22:15PM +0800, Yixun Lan wrote:
> The problem is that one value from drive-strength may match to more than
> two different enum groups which lead to DT complaint, switch to use 'anyOf'
> to fix this kind warning.
> 

Acked-by: Conor Dooley <conor.dooley@...rochip.com>

And I guess:
Reported-by: Conor Dooley <conor.dooley@...rochip.com>


> Fixes: c3efac0592f8 ("dt-bindings: pinctrl: spacemit: convert drive strength to schema format")
> Signed-off-by: Yixun Lan <dlan@...nel.org>
> ---
> Doing DT check with command: make dtbs_check W=1, will get this kind
> of warning message:
> 
> arch/riscv/boot/dts/spacemit/k1-musepi-pro.dtb: pinctrl@...1e000 (spacemit,k1-pinctrl): gmac0-cfg:gmac0-pins:drive-strength: 21 is valid under each of {'enum': [2, 4, 6, 7, 9, 11, 13, 14, 21, 23, 25, 26, 28, 30, 31, 33]}, {'enum': [11, 21, 32, 42]}
> 
> Instead of using more complicated minimum and maximum value of property
> with constrains of compatibles, we decide to use 'anyOf' to fix this
> warning.
> ---
>  Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
> index f009fed87e6b..5194fa92fe93 100644
> --- a/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
> +++ b/Documentation/devicetree/bindings/pinctrl/spacemit,k1-pinctrl.yaml
> @@ -76,7 +76,7 @@ patternProperties:
>            drive-strength:
>              description:
>                typical current (in mA) when the output at high level.
> -            oneOf:
> +            anyOf:
>                - enum: [ 11, 21, 32, 42 ]
>                  description: For K1 SoC, 1.8V voltage output
>  
> 
> ---
> base-commit: 3fcdb264b61a5bb0eb3fb7272717468aa376a74c
> change-id: 20260130-k3-pinctrl-io-drv-fix-5b11752dae1f
> 
> Best regards,
> -- 
> Yixun Lan <dlan@...nel.org>
> 

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