linux-kernel - [PATCH 1/2] dt-bindings: mux: adg2404: add support

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Message-ID: <20251219143244.21674-2-antoniu.miclaus@analog.com>
Date: Fri, 19 Dec 2025 16:31:44 +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>,
        Arnd Bergmann <arnd@...db.de>,
        "Greg
 Kroah-Hartman" <gregkh@...uxfoundation.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] dt-bindings: mux: adg2404: add support

Add dt bindings for adg2404.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
 .../devicetree/bindings/mux/adi,adg2404.yaml  | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mux/adi,adg2404.yaml

diff --git a/Documentation/devicetree/bindings/mux/adi,adg2404.yaml b/Documentation/devicetree/bindings/mux/adi,adg2404.yaml
new file mode 100644
index 000000000000..f28e66f7a250
--- /dev/null
+++ b/Documentation/devicetree/bindings/mux/adi,adg2404.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mux/adi,adg2404.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices ADG2404 4:1 multiplexer
+
+maintainers:
+  - Antoniu Miclaus <antoniu.miclaus@...log.com>
+
+description: |
+  Bindings for Analog Devices ADG2404 4:1 single-ended analog multiplexer
+
+  The multiplexer state corresponds to the selected input channel:
+  * 0: Channel S1 selected
+  * 1: Channel S2 selected
+  * 2: Channel S3 selected
+  * 3: Channel S4 selected
+
+allOf:
+  - $ref: mux-controller.yaml#
+
+properties:
+  compatible:
+    const: adi,adg2404
+
+  addr-gpios:
+    description: |
+      GPIO pins connected to the address inputs, with index 0 being A0 and
+      index 1 being A1. The address pins are set simultaneously to avoid
+      glitches during channel transitions.
+    minItems: 2
+    maxItems: 2
+
+  en-gpios:
+    description: GPIO connected to the EN (enable) pin
+    maxItems: 1
+
+  '#mux-control-cells':
+    const: 0
+
+required:
+  - compatible
+  - addr-gpios
+  - en-gpios
+  - '#mux-control-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    mux-controller {
+        compatible = "adi,adg2404";
+        #mux-control-cells = <0>;
+
+        addr-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>,
+                     <&gpio 2 GPIO_ACTIVE_HIGH>;
+        en-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
+
+        idle-state = <0>; /* Select channel S1 when idle */
+    };
+
+...
-- 
2.43.0