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

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Message-ID: <20260115121943.23715-1-antoniu.miclaus@analog.com>
Date: Thu, 15 Jan 2026 14:18:18 +0200
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: 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>,
        Johan Hovold <johan+linaro@...nel.org>,
        David Lechner
	<dlechner@...libre.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 0/4] mux: gpio-mux: add enable GPIO support and ADG2404

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

Antoniu Miclaus (4):
  dt-bindings: mux: gpio-mux: add enable-gpios support
  mux: gpio-mux: add support for enable GPIO
  dt-bindings: mux: gpio-mux: add adi,adg2404 support
  mux: gpio-mux: add adi,adg2404 support

 .../devicetree/bindings/mux/gpio-mux.yaml     | 26 ++++++++++++++-
 drivers/mux/gpio.c                            | 33 ++++++++++++++++++-
 2 files changed, 57 insertions(+), 2 deletions(-)

-- 
2.43.0