linux-kernel - [PATCH v5 0/2] mux: gpio-mux: add enable GPIO support

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Message-ID: <20260123145743.75705-1-antoniu.miclaus@analog.com>
Date: Fri, 23 Jan 2026 16:57:30 +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>,
        "Srinivas Kandagatla" <srini@...nel.org>,
        Antoniu Miclaus
	<antoniu.miclaus@...log.com>,
        Johan Hovold <johan+linaro@...nel.org>,
        Bartosz
 Golaszewski <brgl@...nel.org>,
        David Lechner <dlechner@...libre.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v5 0/2] mux: gpio-mux: add enable GPIO support

This series adds optional enable GPIO support to the gpio-mux driver.
The enable GPIO allows the multiplexer to be disabled before changing
address lines and re-enabled after, preventing glitches that could
briefly activate unintended channels during transitions.

This feature is useful for devices like the Analog Devices ADG2404
(4:1 mux) that require enable control for glitch-free operation. The
binding documentation now includes ADG2404 as a supported device with
a dedicated example.

Changes in v5:
 - dt-bindings: Expand enable-gpios description to explain high-impedance
   (high-Z) behavior and analog signal considerations
 - dt-bindings: Remove separate ADG2404 example, add enable-gpios to
   existing example instead
 - driver: Enhance code comment to explain high-Z state and downstream
   capacitance for analog multiplexers

Antoniu Miclaus (2):
  dt-bindings: mux: gpio-mux: add enable-gpios support
  mux: gpio-mux: add support for enable GPIO

 .../devicetree/bindings/mux/gpio-mux.yaml     | 16 +++++++++
 drivers/mux/gpio.c                            | 35 ++++++++++++++++++-
 2 files changed, 50 insertions(+), 1 deletion(-)

-- 
2.43.0