1 files changed, 105 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.yaml b/Documentation/devicetree/bindings/hwmon/adt7475.yaml
new file mode 100644
index 000000000..ea595102a
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/adt7475.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/adt7475.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ADT7475 hwmon sensor
+
+maintainers:
+  - Jean Delvare <jdelvare@suse.com>
+
+description: |
+  The ADT7473, ADT7475, ADT7476, and ADT7490 are thermal monitors and multiple
+  PWN fan controllers.
+
+  They support monitoring and controlling up to four fans (the ADT7490 can only
+  control up to three). They support reading a single on chip temperature
+  sensor and two off chip temperature sensors (the ADT7490 additionally
+  supports measuring up to three current external temperature sensors with
+  series resistance cancellation (SRC)).
+
+  Datasheets:
+  https://www.onsemi.com/pub/Collateral/ADT7473-D.PDF
+  https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF
+  https://www.onsemi.com/pub/Collateral/ADT7476-D.PDF
+  https://www.onsemi.com/pub/Collateral/ADT7490-D.PDF
+
+  Description taken from onsemiconductors specification sheets, with minor
+  rephrasing.
+
+properties:
+  compatible:
+    enum:
+      - adi,adt7473
+      - adi,adt7475
+      - adi,adt7476
+      - adi,adt7490
+
+  reg:
+    maxItems: 1
+
+  adi,pwm-active-state:
+    description: |
+      Integer array, represents the active state of the pwm outputs If set to 0
+      the pwm uses a logic low output for 100% duty cycle. If set to 1 the pwm
+      uses a logic high output for 100% duty cycle.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 3
+    maxItems: 3
+    items:
+      enum: [0, 1]
+      default: 1
+
+patternProperties:
+  "^adi,bypass-attenuator-in[0-4]$":
+    description: |
+      Configures bypassing the individual voltage input attenuator. If
+      set to 1 the attenuator is bypassed if set to 0 the attenuator is
+      not bypassed. If the property is absent then the attenuator
+      retains its configuration from the bios/bootloader.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+
+  "adi,pin(5|10)-function":
+    description: |
+      Configures the function for pin 5 on the adi,adt7473 and adi,adt7475. Or
+      pin 10 on the adi,adt7476 and adi,adt7490.
+    $ref: /schemas/types.yaml#/definitions/string
+    enum:
+      - pwm2
+      - smbalert#
+
+  "adi,pin(9|14)-function":
+    description: |
+      Configures the function for pin 9 on the adi,adt7473 and adi,adt7475. Or
+      pin 14 on the adi,adt7476 and adi,adt7490
+    $ref: /schemas/types.yaml#/definitions/string
+    enum:
+      - tach4
+      - therm#
+      - smbalert#
+      - gpio
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      hwmon@2e {
+        compatible = "adi,adt7476";
+        reg = <0x2e>;
+        adi,bypass-attenuator-in0 = <1>;
+        adi,bypass-attenuator-in1 = <0>;
+        adi,pwm-active-state = <1 0 1>;
+        adi,pin10-function = "smbalert#";
+        adi,pin14-function = "tach4";
+      };
+    };