dt-bindings: hwmon: Document SMSC EMC1402/1403/1404/1428

Document the basic hardware layout of SMSC (now Microchip)
EMC1402/1403/1404/1428 thermal sensors.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20260731113007.145322-2-clamor95@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/smsc,emc1403.yaml

@@ -0,0 +1,203 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/smsc,emc1403.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SMSC EMC1402/1403/1404/1428 thermal sensors
+
+maintainers:
+  - Svyatoslav Ryhel <clamor95@gmail.com>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - smsc,emc1402
+          - smsc,emc1403
+          - smsc,emc1404
+          - smsc,emc1428
+
+      - items:
+          - enum:
+              - smsc,emc1412
+              - smsc,emc1422
+              - smsc,emc1442
+          - const: smsc,emc1402
+
+      - items:
+          - enum:
+              - smsc,emc1413
+              - smsc,emc1423
+          - const: smsc,emc1403
+
+      - items:
+          - enum:
+              - smsc,emc1414
+              - smsc,emc1424
+          - const: smsc,emc1404
+
+      - items:
+          - enum:
+              - smsc,emc1438
+          - const: smsc,emc1428
+
+  interrupts:
+    items:
+      - description: Sensors "ALERT" pin output.
+
+  reg:
+    maxItems: 1
+
+  "#thermal-sensor-cells":
+    const: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+
+patternProperties:
+  "^channel@([0-7])$":
+    type: object
+    description: Represents channels of the device and their specific configuration.
+
+    properties:
+      reg:
+        description: The channel number. 0 is local channel, 1-7 are remote channels.
+        items:
+          minimum: 0
+          maximum: 7
+
+      label:
+        description: A descriptive name for this channel, like "ambient" or "psu".
+
+    required:
+      - reg
+
+    additionalProperties: false
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - smsc,emc1402
+    then:
+      patternProperties:
+        "^channel@([0-7])$":
+          properties:
+            reg:
+              items:
+                maximum: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - smsc,emc1403
+    then:
+      patternProperties:
+        "^channel@([0-7])$":
+          properties:
+            reg:
+              items:
+                maximum: 2
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - smsc,emc1404
+    then:
+      patternProperties:
+        "^channel@([0-7])$":
+          properties:
+            reg:
+              items:
+                maximum: 3
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        sensor@4c {
+            compatible = "smsc,emc1412", "smsc,emc1402";
+            reg = <0x4c>;
+
+            interrupt-parent = <&gpio>;
+            interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+
+            vdd-supply = <&vdd_3v3_sys>;
+            #thermal-sensor-cells = <1>;
+        };
+    };
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        sensor@29 {
+            compatible = "smsc,emc1428";
+            reg = <0x29>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            channel@0 {
+                reg = <0x0>;
+                label = "local";
+            };
+
+            channel@1 {
+                reg = <0x1>;
+                label = "chan1";
+            };
+
+            channel@2 {
+                reg = <0x2>;
+                label = "chan2";
+            };
+
+            channel@3 {
+                reg = <0x3>;
+                label = "chan3";
+            };
+
+            channel@4 {
+                reg = <0x4>;
+                label = "chan4";
+            };
+
+            channel@5 {
+                reg = <0x5>;
+                label = "chan5";
+            };
+
+            channel@6 {
+                reg = <0x6>;
+                label = "chan6";
+            };
+
+            channel@7 {
+                reg = <0x7>;
+                label = "chan7";
+            };
+        };
+    };