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|
# 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>;
};
};
};
|
