| # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/hwmon/adt7475.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: ADT7475 hwmon sensor |
| |
| maintainers: |
| - Jean Delvare <jdelvare@suse.com> |
| |
| description: | |
| The ADT7473, ADT7475, ADT7476, and ADT7490 are thermal monitors and multiple |
| PWN fan controllers. |
| |
| They support monitoring and controlling up to four fans (the ADT7490 can only |
| control up to three). They support reading a single on chip temperature |
| sensor and two off chip temperature sensors (the ADT7490 additionally |
| supports measuring up to three current external temperature sensors with |
| series resistance cancellation (SRC)). |
| |
| Datasheets: |
| https://www.onsemi.com/pub/Collateral/ADT7473-D.PDF |
| https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF |
| https://www.onsemi.com/pub/Collateral/ADT7476-D.PDF |
| https://www.onsemi.com/pub/Collateral/ADT7490-D.PDF |
| |
| Description taken from onsemiconductors specification sheets, with minor |
| rephrasing. |
| |
| properties: |
| compatible: |
| enum: |
| - adi,adt7473 |
| - adi,adt7475 |
| - adi,adt7476 |
| - adi,adt7490 |
| |
| reg: |
| maxItems: 1 |
| |
| adi,pwm-active-state: |
| description: | |
| Integer array, represents the active state of the pwm outputs If set to 0 |
| the pwm uses a logic low output for 100% duty cycle. If set to 1 the pwm |
| uses a logic high output for 100% duty cycle. |
| $ref: /schemas/types.yaml#/definitions/uint32-array |
| deprecated: true |
| minItems: 3 |
| maxItems: 3 |
| items: |
| enum: [0, 1] |
| default: 1 |
| |
| "#pwm-cells": |
| const: 4 |
| description: | |
| Number of cells in a PWM specifier. |
| - 0: The PWM channel |
| - 1: The PWM period in nanoseconds |
| - 90909091 (11 Hz) |
| - 71428571 (14 Hz) |
| - 45454545 (22 Hz) |
| - 34482759 (29 Hz) |
| - 28571429 (35 Hz) |
| - 22727273 (44 Hz) |
| - 17241379 (58 Hz) |
| - 11363636 (88 Hz) |
| - 44444 (22 kHz) |
| - 2: PWM flags 0 or PWM_POLARITY_INVERTED |
| - 3: The default PWM duty cycle in nanoseconds |
| |
| patternProperties: |
| "^adi,bypass-attenuator-in[0-4]$": |
| description: | |
| Configures bypassing the individual voltage input attenuator. If |
| set to 1 the attenuator is bypassed if set to 0 the attenuator is |
| not bypassed. If the property is absent then the attenuator |
| retains its configuration from the bios/bootloader. |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| enum: [0, 1] |
| |
| "^adi,pin(5|10)-function$": |
| description: | |
| Configures the function for pin 5 on the adi,adt7473 and adi,adt7475. Or |
| pin 10 on the adi,adt7476 and adi,adt7490. |
| $ref: /schemas/types.yaml#/definitions/string |
| enum: |
| - pwm2 |
| - smbalert# |
| |
| "^adi,pin(9|14)-function$": |
| description: | |
| Configures the function for pin 9 on the adi,adt7473 and adi,adt7475. Or |
| pin 14 on the adi,adt7476 and adi,adt7490 |
| $ref: /schemas/types.yaml#/definitions/string |
| enum: |
| - tach4 |
| - therm# |
| - smbalert# |
| - gpio |
| |
| "^fan-[0-9]+$": |
| $ref: fan-common.yaml# |
| unevaluatedProperties: false |
| |
| required: |
| - compatible |
| - reg |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| #include <dt-bindings/pwm/pwm.h> |
| i2c { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| pwm: hwmon@2e { |
| compatible = "adi,adt7476"; |
| reg = <0x2e>; |
| adi,bypass-attenuator-in0 = <1>; |
| adi,bypass-attenuator-in1 = <0>; |
| adi,pin10-function = "smbalert#"; |
| adi,pin14-function = "tach4"; |
| #pwm-cells = <4>; |
| |
| /* PWMs at 22.5 kHz frequency, 50% duty*/ |
| fan-0 { |
| pwms = <&pwm 0 44444 0 22222>; |
| }; |
| |
| fan-1 { |
| pwms = <&pwm 2 44444 0 22222>; |
| }; |
| }; |
| }; |
