linux-kernel - RE: [PATCH v3 0/4] mux: gpio-mux: add enable GPIO support and ADG2404

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Message-ID:
 <CY4PR03MB3399B977D58D152144CF2FBC9B8DA@CY4PR03MB3399.namprd03.prod.outlook.com>
Date: Fri, 16 Jan 2026 16:17:59 +0000
From: "Miclaus, Antoniu" <Antoniu.Miclaus@...log.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, Johan Hovold <johan@...nel.org>
CC: Peter Rosin <peda@...ntia.se>, Rob Herring <robh@...nel.org>,
        Krzysztof
 Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Srinivas
 Kandagatla <srini@...nel.org>,
        Johan Hovold <johan+linaro@...nel.org>,
        David
 Lechner <dlechner@...libre.com>,
        "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v3 0/4] mux: gpio-mux: add enable GPIO support and ADG2404

> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@...nel.org>
> Sent: Friday, January 16, 2026 6:06 PM
> To: Miclaus, Antoniu <Antoniu.Miclaus@...log.com>; Johan Hovold
> <johan@...nel.org>
> Cc: Peter Rosin <peda@...ntia.se>; Rob Herring <robh@...nel.org>; Krzysztof
> Kozlowski <krzk+dt@...nel.org>; Conor Dooley <conor+dt@...nel.org>;
> Srinivas Kandagatla <srini@...nel.org>; Johan Hovold
> <johan+linaro@...nel.org>; David Lechner <dlechner@...libre.com>;
> devicetree@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v3 0/4] mux: gpio-mux: add enable GPIO support and
> ADG2404
> 
> [External]
> 
> On 16/01/2026 16:26, Miclaus, Antoniu wrote:
> >
> >
> > --
> > Antoniu Miclăuş
> >
> >> -----Original Message-----
> >> From: Krzysztof Kozlowski <krzk@...nel.org>
> >> Sent: Friday, January 16, 2026 12:32 PM
> >> To: Miclaus, Antoniu <Antoniu.Miclaus@...log.com>; Johan Hovold
> >> <johan@...nel.org>
> >> Cc: Peter Rosin <peda@...ntia.se>; Rob Herring <robh@...nel.org>;
> Krzysztof
> >> Kozlowski <krzk+dt@...nel.org>; Conor Dooley <conor+dt@...nel.org>;
> >> Srinivas Kandagatla <srini@...nel.org>; Johan Hovold
> >> <johan+linaro@...nel.org>; David Lechner <dlechner@...libre.com>;
> >> devicetree@...r.kernel.org; linux-kernel@...r.kernel.org
> >> Subject: Re: [PATCH v3 0/4] mux: gpio-mux: add enable GPIO support and
> >> ADG2404
> >>
> >> [External]
> >>
> >> On 16/01/2026 10:39, Miclaus, Antoniu wrote:
> >>>> -----Original Message-----
> >>>> From: Johan Hovold <johan@...nel.org>
> >>>> Sent: Friday, January 16, 2026 11:01 AM
> >>>> To: Krzysztof Kozlowski <krzk@...nel.org>
> >>>> Cc: Miclaus, Antoniu <Antoniu.Miclaus@...log.com>; Peter Rosin
> >>>> <peda@...ntia.se>; Rob Herring <robh@...nel.org>; Krzysztof
> Kozlowski
> >>>> <krzk+dt@...nel.org>; Conor Dooley <conor+dt@...nel.org>; Srinivas
> >>>> Kandagatla <srini@...nel.org>; Johan Hovold
> <johan+linaro@...nel.org>;
> >>>> David Lechner <dlechner@...libre.com>; devicetree@...r.kernel.org;
> >> linux-
> >>>> kernel@...r.kernel.org
> >>>> Subject: Re: [PATCH v3 0/4] mux: gpio-mux: add enable GPIO support
> and
> >>>> ADG2404
> >>>>
> >>>> [External]
> >>>>
> >>>> On Fri, Jan 16, 2026 at 09:37:36AM +0100, Krzysztof Kozlowski wrote:
> >>>>> On Thu, Jan 15, 2026 at 02:18:18PM +0200, Antoniu Miclaus wrote:
> >>>>>> This series extends the gpio-mux driver with optional enable GPIO
> >> support
> >>>>>> to prevent glitches during channel transitions, then adds support for
> the
> >>>>>> Analog Devices ADG2404 multiplexer as the first user of this feature.
> >>>>>>
> >>>>>> The enable GPIO allows the multiplexer to be disabled before changing
> >>>>>> address lines and re-enabled after, preventing brief activation of
> >>>>>> unintended channels during transitions. This is particularly important
> >>>>>> for precision analog applications.
> >>>>>>
> >>>>>> The ADG2404 is a 4:1 analog multiplexer with low 0.62Ω on-resistance
> >>>>>> that requires this enable GPIO functionality for glitch-free operation.
> >>>>>>
> >>>>>> Changes in v3:
> >>>>>>  * Extend gpio-mux driver instead of creating standalone adg2404
> driver
> >>>>>>  * Make enable GPIO optional for backward compatibility
> >>>>>>  * Add MUX_IDLE_DISCONNECT support via enable GPIO
> >>>>>
> >>>>> You are developing on some old kernel. You got stale Cc list of at least
> >>>>> three people! How could you for example get
> "johan+linaro@...nel.org" -
> >>>>> from which maintainer entry - but that at least is not bouncing like two
> >>>>> others.
> >>>>
> >>>> Probably from using get_maintainer.pl --git:
> >>>>
> >>>> 	$ scripts/get_maintainer.pl --git drivers/mux/gpio.c
> >>>> 	Peter Rosin <peda@...ntia.se> (maintainer:MULTIPLEXER
> >>>> SUBSYSTEM)
> >>>> 	Srinivas Kandagatla <srini@...nel.org>
> >>>> (commit_signer:1/2=50%,authored:1/2=50%,added_lines:5/6=83%)
> >>>> 	Krzysztof Kozlowski <krzk@...nel.org> (commit_signer:1/2=50%)
> >>>> 	Bartosz Golaszewski <brgl@...nel.org> (commit_signer:1/2=50%)
> >>>> 	David Lechner <dlechner@...libre.com>
> >>>>
> >>
> (commit_signer:1/2=50%,authored:1/2=50%,added_lines:1/6=17%,removed
> >>>> _lines:3/3=100%)
> >>>> 	Johan Hovold <johan+linaro@...nel.org> (commit_signer:1/2=50%)
> >>>> 	linux-kernel@...r.kernel.org (open list)
> >>>> 	MULTIPLEXER SUBSYSTEM status: Odd Fixes
> >>>>
> >>>> A recent mailmap is indeed needed to remap Bartosz's old address,
> >>>> though.
> >>>>
> >>>
> >>> Yes, I've used "--to-cmd='./scripts/get_maintainer.pl --norolestats" when
> >> sending the patches.
> >>
> >> Then how did you get non-working Bartosz and Linus' emails?
> >
> > I am on torvalds/linux latest master branch now. Here is the output of
> ./scripts/get_maintainer.pl --norolestats:
> > Peter Rosin <peda@...ntia.se>
> > Rob Herring <robh@...nel.org>
> > Krzysztof Kozlowski <krzk+dt@...nel.org>
> > Conor Dooley <conor+dt@...nel.org>
> > Antoniu Miclaus <antoniu.miclaus@...log.com>
> > Srinivas Kandagatla <srini@...nel.org>
> > Bartosz Golaszewski <brgl@...nel.org>
> 
> Exactly. So why did you send it to:
> Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> and
> Linus Walleij <linus.walleij@...aro.org>
> 
> I mean, this is the third time I am asking but you keep deflecting the
> question with some sort of other data...

I was on an older branch.
This should be fixed now.

Regards,

> Best regards,
> Krzysztof