1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/hwmon/adt7475.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: ADT7475 hwmon sensor 8 9maintainers: 10 - Jean Delvare <jdelvare@suse.com> 11 12description: | 13 The ADT7473, ADT7475, ADT7476, and ADT7490 are thermal monitors and multiple 14 PWN fan controllers. 15 16 They support monitoring and controlling up to four fans (the ADT7490 can only 17 control up to three). They support reading a single on chip temperature 18 sensor and two off chip temperature sensors (the ADT7490 additionally 19 supports measuring up to three current external temperature sensors with 20 series resistance cancellation (SRC)). 21 22 Datasheets: 23 https://www.onsemi.com/pub/Collateral/ADT7473-D.PDF 24 https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF 25 https://www.onsemi.com/pub/Collateral/ADT7476-D.PDF 26 https://www.onsemi.com/pub/Collateral/ADT7490-D.PDF 27 28 Description taken from onsemiconductors specification sheets, with minor 29 rephrasing. 30 31properties: 32 compatible: 33 enum: 34 - adi,adt7473 35 - adi,adt7475 36 - adi,adt7476 37 - adi,adt7490 38 39 reg: 40 maxItems: 1 41 42 adi,pwm-active-state: 43 description: | 44 Integer array, represents the active state of the pwm outputs If set to 0 45 the pwm uses a logic low output for 100% duty cycle. If set to 1 the pwm 46 uses a logic high output for 100% duty cycle. 47 $ref: /schemas/types.yaml#/definitions/uint32-array 48 minItems: 3 49 maxItems: 3 50 items: 51 enum: [0, 1] 52 default: 1 53 54patternProperties: 55 "^adi,bypass-attenuator-in[0-4]$": 56 description: | 57 Configures bypassing the individual voltage input attenuator. If 58 set to 1 the attenuator is bypassed if set to 0 the attenuator is 59 not bypassed. If the property is absent then the attenuator 60 retains it's configuration from the bios/bootloader. 61 $ref: /schemas/types.yaml#/definitions/uint32 62 enum: [0, 1] 63 64required: 65 - compatible 66 - reg 67 68additionalProperties: false 69 70examples: 71 - | 72 i2c { 73 #address-cells = <1>; 74 #size-cells = <0>; 75 76 hwmon@2e { 77 compatible = "adi,adt7476"; 78 reg = <0x2e>; 79 adi,bypass-attenuator-in0 = <1>; 80 adi,bypass-attenuator-in1 = <0>; 81 adi,pwm-active-state = <1 0 1>; 82 }; 83 }; 84 85