linux-kernel - [PATCH v3 3/4] dt-bindings: mux: gpio-mux: add adi,adg2404 support

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Message-ID: <20260115121943.23715-4-antoniu.miclaus@analog.com>
Date: Thu, 15 Jan 2026 14:18:21 +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>,
        Bartosz
 Golaszewski <bartosz.golaszewski@...aro.org>,
        David Lechner
	<dlechner@...libre.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 3/4] dt-bindings: mux: gpio-mux: add adi,adg2404 support

Add adi,adg2404 as a compatible string. The ADG2404 is a 4:1 analog
multiplexer that uses the enable-gpios feature.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
changes in v3:
 * integrate with gpio-mux bindings instead of separate adi,adg2404.yaml
---
 .../devicetree/bindings/mux/gpio-mux.yaml     | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mux/gpio-mux.yaml b/Documentation/devicetree/bindings/mux/gpio-mux.yaml
index 199792d42323..f5866b9f46dd 100644
--- a/Documentation/devicetree/bindings/mux/gpio-mux.yaml
+++ b/Documentation/devicetree/bindings/mux/gpio-mux.yaml
@@ -19,7 +19,9 @@ description: |+
 
 properties:
   compatible:
-    const: gpio-mux
+    enum:
+      - gpio-mux
+      - adi,adg2404
 
   mux-gpios:
     description:
@@ -107,4 +109,19 @@ examples:
             };
         };
     };
+
+  - |
+    /* ADG2404 4:1 multiplexer with enable GPIO */
+    #include <dt-bindings/gpio/gpio.h>
+
+    mux-controller {
+        compatible = "adi,adg2404";
+        #mux-control-cells = <0>;
+
+        mux-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>,
+                    <&gpio 2 GPIO_ACTIVE_HIGH>;
+        enable-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
+
+        idle-state = <0>; /* Select channel S1 when idle */
+    };
 ...
-- 
2.43.0