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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/gmt,g762.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: GMT G761/G762/G763 PWM Fan controller
maintainers:
- Christian Marangi <ansuelsmth@gmail.com>
description: |
GMT G761/G762/G763 PWM Fan controller.
G761 supports an internal-clock hence the clocks property is optional.
If not defined, internal-clock will be used. (31KHz is the clock of
the internal crystal oscillator)
If an optional property is not set in DT, then current value is kept
unmodified (e.g. bootloader installed value).
Additional information on operational parameters for the device is available
in Documentation/hwmon/g762.rst. A detailed datasheet for the device is available
at http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf.
properties:
compatible:
enum:
- gmt,g761
- gmt,g762
- gmt,g763
reg:
maxItems: 1
clocks:
description: a fixed clock providing input clock frequency on CLK
pin of the chip.
maxItems: 1
fan_startv:
description: Fan startup voltage step
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3]
pwm_polarity:
description: PWM polarity (positive or negative duty)
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1]
fan_gear_mode:
description: FAN gear mode. Configure High speed fan setting factor
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2]
required:
- compatible
- reg
if:
properties:
compatible:
contains:
enum:
- gmt,g762
- gmt,g763
then:
required:
- clocks
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
g762@3e {
compatible = "gmt,g762";
reg = <0x3e>;
clocks = <&g762_clk>;
fan_gear_mode = <0>;
fan_startv = <1>;
pwm_polarity = <0>;
};
g761@1e {
compatible = "gmt,g761";
reg = <0x1e>;
fan_gear_mode = <0>;
fan_startv = <1>;
pwm_polarity = <0>;
};
};
|
