dt-bindings: hwmon: zyxel,nsa320-mcu: convert to DT schema

Convert the ZyXEL NSA320 MCU bindings from text format to YAML schema.

Signed-off-by: Manish Baing <manishbaing2789@gmail.com>
Acked-by: Adam Baker <linux@baker-net.org.uk>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260501102116.8275-1-manishbaing2789@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/devicetree/bindings/hwmon/nsa320-mcu.txt b/Documentation/devicetree/bindings/hwmon/nsa320-mcu.txt
deleted file mode 100644 (file)
index 0863e06..0000000
--- a/Documentation/devicetree/bindings/hwmon/nsa320-mcu.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-Bindings for the fan / temperature monitor microcontroller used on
-the Zyxel NSA 320 and several subsequent models.
-
-Required properties:
-- compatible   : "zyxel,nsa320-mcu"
-- data-gpios   : The GPIO pin connected to the data line on the MCU
-- clk-gpios    : The GPIO pin connected to the clock line on the MCU
-- act-gpios    : The GPIO pin connected to the active line on the MCU
-
-Example:
-
-       hwmon {
-               compatible = "zyxel,nsa320-mcu";
-               pinctrl-0 = <&pmx_mcu_data &pmx_mcu_clk &pmx_mcu_act>;
-               pinctrl-names = "default";
-
-               data-gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
-               clk-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
-               act-gpios = <&gpio0 17 GPIO_ACTIVE_LOW>;
-       };

diff --git a/Documentation/devicetree/bindings/hwmon/zyxel,nsa320-mcu.yaml b/Documentation/devicetree/bindings/hwmon/zyxel,nsa320-mcu.yaml
new file mode 100644 (file)
index 0000000..a111f81
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/zyxel,nsa320-mcu.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/zyxel,nsa320-mcu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ZyXEL NSA320 MCU
+
+maintainers:
+  - Adam Baker <linux@baker-net.org.uk>
+  - Guenter Roeck <linux@roeck-us.net>
+
+description:
+  The ZyXEL NSA320 uses a dedicated microcontroller to manage system-critical
+  functions like fan speed and power monitoring. It is connected to the SoC
+  via a GPIO-based serial protocol.
+
+properties:
+  compatible:
+    const: zyxel,nsa320-mcu
+
+  data-gpios:
+    maxItems: 1
+    description: GPIO pin connected to the data line on the MCU.
+
+  clk-gpios:
+    maxItems: 1
+    description: GPIO pin connected to the clock line on the MCU.
+
+  act-gpios:
+    maxItems: 1
+    description: GPIO pin connected to the active line on the MCU.
+
+required:
+  - compatible
+  - data-gpios
+  - clk-gpios
+  - act-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    hwmon {
+        compatible = "zyxel,nsa320-mcu";
+        pinctrl-0 = <&pmx_mcu_data &pmx_mcu_clk &pmx_mcu_act>;
+        pinctrl-names = "default";
+
+        data-gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
+        clk-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
+        act-gpios = <&gpio0 17 GPIO_ACTIVE_LOW>;
+    };