[PATCH v2 2/3] dt-bindings: hwmon: Add binding for max6639

[Naresh Solanki <naresh.solanki@9elements.com>]

From: Marcello Sylvester Bauer <sylv@sylv.io>

Add Devicetree binding documentation for Maxim MAX6639 temperature
monitor with PWM fan-speed controller.

Signed-off-by: Marcello Sylvester Bauer <sylv@sylv.io>
Signed-off-by: Naresh Solanki <Naresh.Solanki@9elements.com>
---
 .../bindings/hwmon/maxim,max6639.yaml         | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml
new file mode 100644
index 000000000000..bbefb0a57ab3
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/hwmon/maxim,max6639.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim max6639
+
+maintainers:
+  - Roland Stigge <stigge@antcom.de>
+
+description: |
+  The MAX6639 is a 2-channel temperature monitor with dual, automatic, PWM
+  fan-speed controller.  It monitors its own temperature and one external
+  diode-connected transistor or the temperatures of two external diode-connected
+  transistors, typically available in CPUs, FPGAs, or GPUs.
+
+  Datasheets:
+    https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf
+
+properties:
+  compatible:
+    enum:
+      - maxim,max6639
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+
+patternProperties:
+  "^ot[0-1]_indication$":
+    type: boolean
+    default: false
+    description:
+      If true then enable OT pin indication.
+
+  "^therm[0-1]_indication$":
+    type: boolean
+    default: false
+    description:
+      If true then enable THERM pin indication.
+
+  "^fan@[0-1]$":
+    type: object
+    description: |
+      Represents the two fans and their specific configuration.
+
+    $ref: fan-common.yaml#
+
+    properties:
+      reg:
+        description: |
+          The fan number.
+        items:
+          minimum: 0
+          maximum: 1
+
+      maxim,fan-spin-up:
+        type: boolean
+        description:
+          If true then whnever the fan starts up from zero drive, it
+          is driven with 100% duty cycle for 2s to ensure that it
+          starts.
+
+      maxim,full-speed-on-therm:
+        type: boolean
+        description:
+          If true then force fan to full speed if THERM pin goes low.
+
+      maxim,fanfail_indication:
+        type: boolean
+        description:
+          If true then enable fanfail pin indication.
+    required:
+      - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      max6639@10 {
+        compatible = "maxim,max6639";
+        reg = <0x10>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        fan@0 {
+          reg = <0x0>;
+          pulses-per-revolution = <2>;
+          max-rpm = <4000>;
+          pwm-frequency = <25000>;
+        };
+
+        fan@1 {
+          reg = <0x1>;
+          pulses-per-revolution = <2>;
+          max-rpm = <32000>;
+          pwm-frequency = <25000>;
+        };
+      };
+    };
+...
-- 
2.37.3