linux-kernel - Re: [PATCH v2 0/2] mux: adg2404: add support for ADG2404 multiplexer

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Message-ID: <235c06b2-f69e-4186-9b30-49fde7773a84@axentia.se>
Date: Wed, 7 Jan 2026 09:33:09 +0100
From: Peter Rosin <peda@...ntia.se>
To: Rob Herring <robh@...nel.org>,
 Antoniu Miclaus <antoniu.miclaus@...log.com>
Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] mux: adg2404: add support for ADG2404 multiplexer

Hi!

2026-01-06 at 20:05, Rob Herring wrote:
> On Mon, Jan 05, 2026 at 02:00:29PM +0200, Antoniu Miclaus wrote:
>> This series adds support for the Analog Devices ADG2404, a 4:1 analog
>> multiplexer with low 0.62Ω on-resistance.
>>
>> The ADG2404 features:
>> - Low RON of 0.62Ω
>> - Flat RON across signal range (0.003Ω)
>> - Dual supply operation (±15V, ±5V)
>> - Single supply operation (+12V)
>> - Asymmetric supply support (+5V/-12V)
>> - 1.8V/3.3V/5V logic compatibility
>> - Break-before-make switching
>>
>> Applications include automatic test equipment, data acquisition,
>> instrumentation, audio/video switching, and communication systems.
> 
> Isn't this just a gpio-mux with the addition of an enable GPIO line? 
> Wouldn't adding enable-gpios and support for it in the gpio-mux driver 
> work?

Yes, I agree. Please extend gpio-mux instead of duplicating it.

Cheers,
Peter