71 lines · yaml
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/hwmon/maxim,max31790.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: The Maxim MAX31790 Fan Controller8 9maintainers:10 - Guenter Roeck <linux@roeck-us.net>11 - Chanh Nguyen <chanh@os.amperecomputing.com>12 13description: >14 The MAX31790 controls the speeds of up to six fans using six15 independent PWM outputs. The desired fan speeds (or PWM duty cycles)16 are written through the I2C interface.17 18 Datasheets:19 https://datasheets.maximintegrated.com/en/ds/MAX31790.pdf20 21properties:22 compatible:23 const: maxim,max3179024 25 reg:26 maxItems: 127 28 clocks:29 maxItems: 130 31 resets:32 maxItems: 133 34 "#pwm-cells":35 const: 136 37patternProperties:38 "^fan-[0-9]+$":39 $ref: fan-common.yaml#40 unevaluatedProperties: false41 42required:43 - compatible44 - reg45 46additionalProperties: false47 48examples:49 - |50 i2c {51 #address-cells = <1>;52 #size-cells = <0>;53 54 pwm_provider: fan-controller@20 {55 compatible = "maxim,max31790";56 reg = <0x20>;57 clocks = <&sys_clk>;58 resets = <&reset 0>;59 #pwm-cells = <1>;60 61 fan-0 {62 pwms = <&pwm_provider 1>;63 };64 65 fan-1 {66 pwms = <&pwm_provider 2>;67 };68 };69 };70 71