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@xxxxxxx> --- .../bindings/hwmon/maxim,max6639.yaml | 71 +++++++++++++++++++ 1 file changed, 71 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..136ed37b6aac --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml @@ -0,0 +1,71 @@ +# 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@xxxxxxxxx> + +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 + + 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. + Fans PWM polarity is set to high (1) by default. + + 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: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + max6639@10 { + compatible = "maxim,max6639"; + reg = <0x10>; + polarity = <1>; + pulses-per-revolution = <2>; + rpm-range = <4000>; + }; + }; -- 2.33.1
