mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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05a0ffe37c
To make this binding match what is usally used for PWMs, deprecate 4 cells and allow 3 instead. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/77895aec937b6217f513d3b12e7945f1707fd906.1750361514.git.u.kleine-koenig@baylibre.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
142 lines
3.8 KiB
YAML
142 lines
3.8 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/hwmon/adt7475.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ADT7475 hwmon sensor
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maintainers:
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- Jean Delvare <jdelvare@suse.com>
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description: |
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The ADT7473, ADT7475, ADT7476, and ADT7490 are thermal monitors and multiple
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PWN fan controllers.
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They support monitoring and controlling up to four fans (the ADT7490 can only
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control up to three). They support reading a single on chip temperature
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sensor and two off chip temperature sensors (the ADT7490 additionally
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supports measuring up to three current external temperature sensors with
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series resistance cancellation (SRC)).
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Datasheets:
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https://www.onsemi.com/pub/Collateral/ADT7473-D.PDF
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https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF
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https://www.onsemi.com/pub/Collateral/ADT7476-D.PDF
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https://www.onsemi.com/pub/Collateral/ADT7490-D.PDF
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Description taken from onsemiconductors specification sheets, with minor
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rephrasing.
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properties:
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compatible:
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enum:
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- adi,adt7473
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- adi,adt7475
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- adi,adt7476
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- adi,adt7490
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reg:
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maxItems: 1
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adi,pwm-active-state:
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description: |
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Integer array, represents the active state of the pwm outputs If set to 0
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the pwm uses a logic low output for 100% duty cycle. If set to 1 the pwm
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uses a logic high output for 100% duty cycle.
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$ref: /schemas/types.yaml#/definitions/uint32-array
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deprecated: true
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minItems: 3
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maxItems: 3
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items:
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enum: [0, 1]
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default: 1
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"#pwm-cells":
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oneOf:
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- const: 3
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- const: 4
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deprecated: true
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description: |
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Number of cells in a PWM specifier.
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- 0: The PWM channel
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- 1: The PWM period in nanoseconds
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- 90909091 (11 Hz)
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- 71428571 (14 Hz)
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- 45454545 (22 Hz)
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- 34482759 (29 Hz)
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- 28571429 (35 Hz)
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- 22727273 (44 Hz)
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- 17241379 (58 Hz)
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- 11363636 (88 Hz)
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- 44444 (22 kHz)
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- 2: PWM flags 0 or PWM_POLARITY_INVERTED
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- 3: The default PWM duty cycle in nanoseconds, defaults to period.
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patternProperties:
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"^adi,bypass-attenuator-in[0-4]$":
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description: |
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Configures bypassing the individual voltage input attenuator. If
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set to 1 the attenuator is bypassed if set to 0 the attenuator is
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not bypassed. If the property is absent then the attenuator
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retains its configuration from the bios/bootloader.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1]
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"^adi,pin(5|10)-function$":
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description: |
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Configures the function for pin 5 on the adi,adt7473 and adi,adt7475. Or
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pin 10 on the adi,adt7476 and adi,adt7490.
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$ref: /schemas/types.yaml#/definitions/string
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enum:
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- pwm2
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- smbalert#
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"^adi,pin(9|14)-function$":
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description: |
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Configures the function for pin 9 on the adi,adt7473 and adi,adt7475. Or
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pin 14 on the adi,adt7476 and adi,adt7490
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$ref: /schemas/types.yaml#/definitions/string
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enum:
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- tach4
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- therm#
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- smbalert#
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- gpio
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"^fan-[0-9]+$":
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$ref: fan-common.yaml#
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unevaluatedProperties: false
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/pwm/pwm.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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pwm: hwmon@2e {
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compatible = "adi,adt7476";
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reg = <0x2e>;
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adi,bypass-attenuator-in0 = <1>;
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adi,bypass-attenuator-in1 = <0>;
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adi,pin10-function = "smbalert#";
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adi,pin14-function = "tach4";
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#pwm-cells = <3>;
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/* PWMs at 22.5 kHz frequency */
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fan-0 {
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pwms = <&pwm 0 44444 0>;
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};
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fan-1 {
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pwms = <&pwm 2 44444 0>;
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};
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};
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};
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