linux-kernel - Re: [PATCH v2 1/3] dt-bindings: usb: usb251xb: make reg optional for no I2C ctrl use case

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Message-ID: <20250819-eminent-cobra-from-venus-d891b6@kuoka>
Date: Tue, 19 Aug 2025 11:22:51 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Jisheng Zhang <jszhang@...nel.org>
Cc: Richard Leitner <richard.leitner@...ux.dev>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, linux-usb@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] dt-bindings: usb: usb251xb: make reg optional for
 no I2C ctrl use case

On Tue, Aug 19, 2025 at 08:22:15AM +0800, Jisheng Zhang wrote:
> Make "reg" optional to allow the driver to be used to manage GPIO
> based control of the device.

I don't understand how optional reg allows or disallows anything for the
driver. It's really not relevant to GPIO at all.

Also feels wrong, but maybe you just lack proper, reasonable
justification. Just explain carefully the hardware, not drivers.

Best regards,
Krzysztof