linux-kernel - Re: [PATCH] dt-bindings: mfd: aspeed: Drop 'oneOf' for pinctrl node

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Date: Wed, 01 May 2024 10:10:18 +0930
From: Andrew Jeffery <andrew@...econstruct.com.au>
To: "Rob Herring (Arm)" <robh@...nel.org>, Lee Jones <lee@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley
 <conor+dt@...nel.org>, Joel Stanley <joel@....id.au>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: mfd: aspeed: Drop 'oneOf' for pinctrl node

On Tue, 2024-04-30 at 12:25 -0500, Rob Herring (Arm) wrote:
> The use of 'oneOf' to include 1 of 3 possible child node schemas results
> in error messages containing the actual error message(s) for the correct
> SoC buried in the tons of error messages from the 2 schemas that don't
> apply. It also causes the pinctrl schema to be applied twice as it will
> be applied when the compatible matches.
> 
> All that's really needed in the parent schema is to ensure one of the
> possible compatible strings is present in the pinctrl node so that its
> schema will be applied separately.

Thanks, I think it improves the readability of intent in the binding as
well.

To understand the impact better I grabbed the patch and diffed the
output of `make CHECK_DTBS=y aspeed/aspeed-ast2600-evb.dtb` before and
after applying it, but there was no significant difference in output.
Should that not demonstrate the errors being cleaned up? If not, what
should?

Andrew