linux-kernel - Re: [RFC PATCH v2 1/2] devicetree: bindings: mux: reg-mux: Update bindings for reg-mux for new property

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Message-ID: <20250304153959.GA2654372-robh@kernel.org>
Date: Tue, 4 Mar 2025 09:39:59 -0600
From: Rob Herring <robh@...nel.org>
To: Chintan Vankar <c-vankar@...com>
Cc: Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Peter Rosin <peda@...ntia.se>, s-vadapalli@...com,
	danishanwar@...com, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [RFC PATCH v2 1/2] devicetree: bindings: mux: reg-mux: Update
 bindings for reg-mux for new property

On Tue, Mar 04, 2025 at 03:53:05PM +0530, Chintan Vankar wrote:
> DT-binding of reg-mux is defined in such a way that one need to provide
> register offset and mask in a "mux-reg-masks" property and corresponding
> register value in "idle-states" property. This constraint forces to define
> these values in such a way that "mux-reg-masks" and "idle-states" must be
> in sync with each other. This implementation would be more complex if
> specific register or set of registers need to be configured which has
> large memory space. Introduce a new property "mux-reg-masks-state" which
> allow to specify offset, mask and value as a tuple in a single property.

Maybe in hindsight that would have been better, but having 2 ways to 
specify the same thing that we have to maintain forever is not an 
improvement.

No one is making you use this binding. If you have a large number of 
muxes, then maybe you should use a specific binding.

Rob