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Subject[PATCH v2 3/4] dt-bindings: hwmon: Add binding for max6639
Date
Add Devicetree binding documentation for Maxim MAX6639 temperature
monitor with PWM fan-speed controller.

The devicetree documentation for the SD3078 device tree.

Signed-off-by: Marcello Sylvester Bauer <sylv@sylv.io>
---
.../bindings/hwmon/maxim,max6639.yaml | 112 ++++++++++++++++++
1 file changed, 112 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..7093cbeba44b
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml
@@ -0,0 +1,112 @@
+# 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
+ - "channel@0"
+ - "channel@1"
+
+additionalProperties: false
+
+patternProperties:
+ "^channel@[0-1]$":
+ type: object
+ description: |
+ Represents the two fans and their specific configuration.
+
+ properties:
+ reg:
+ description: |
+ The fan number.
+ items:
+ minimum: 0
+ maximum: 1
+
+ pwm-polarity:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1]
+ description:
+ PWM output is low at 100% duty cycle when this bit is set to zero. PWM
+ output is high at 100% duty cycle when this bit is set to 1.
+
+ pulses-per-revolution:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [1, 2, 3, 4]
+ description:
+ Value specifying the number of pulses per revolution of the controlled
+ FAN.
+
+ rpm-range:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [2000, 4000, 8000, 16000]
+ description:
+ Scales the tachometer counter by setting the maximum (full-scale) value
+ of the RPM range.
+
+ required:
+ - reg
+ - pwm-polarity
+ - pulses-per-revolution
+ - rpm-range
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ max6639@10 {
+ compatible = "maxim,max6639";
+ reg = <0x10>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ channel@0 {
+ reg = <0x0>;
+ pwm-polarity = <1>;
+ pulses-per-revolution = <2>;
+ rpm-range = <4000>;
+ };
+
+ channel@1 {
+ reg = <0x1>;
+ pwm-polarity = <1>;
+ pulses-per-revolution = <2>;
+ rpm-range = <4000>;
+ };
+ };
+ };
+...
--
2.33.1
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