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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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302fdb1688
Add support for g761 PWM Fan controller. This is an exact copy of g763 with the difference that it does also support an internal clock oscillator. With clocks property not defined, the internal clock oscillator is used. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20240604164348.542-2-ansuelsmth@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
96 lines
2.2 KiB
YAML
96 lines
2.2 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/hwmon/gmt,g762.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: GMT G761/G762/G763 PWM Fan controller
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maintainers:
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- Christian Marangi <ansuelsmth@gmail.com>
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description: |
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GMT G761/G762/G763 PWM Fan controller.
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G761 supports an internal-clock hence the clocks property is optional.
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If not defined, internal-clock will be used. (31KHz is the clock of
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the internal crystal oscillator)
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If an optional property is not set in DT, then current value is kept
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unmodified (e.g. bootloader installed value).
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Additional information on operational parameters for the device is available
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in Documentation/hwmon/g762.rst. A detailed datasheet for the device is available
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at http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf.
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properties:
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compatible:
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enum:
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- gmt,g761
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- gmt,g762
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- gmt,g763
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reg:
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maxItems: 1
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clocks:
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description: a fixed clock providing input clock frequency on CLK
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pin of the chip.
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maxItems: 1
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fan_startv:
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description: Fan startup voltage step
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2, 3]
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pwm_polarity:
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description: PWM polarity (positive or negative duty)
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1]
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fan_gear_mode:
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description: FAN gear mode. Configure High speed fan setting factor
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2]
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required:
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- compatible
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- reg
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if:
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properties:
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compatible:
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contains:
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enum:
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- gmt,g762
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- gmt,g763
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then:
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required:
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- clocks
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additionalProperties: false
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examples:
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- |
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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g762@3e {
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compatible = "gmt,g762";
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reg = <0x3e>;
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clocks = <&g762_clk>;
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fan_gear_mode = <0>;
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fan_startv = <1>;
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pwm_polarity = <0>;
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};
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g761@1e {
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compatible = "gmt,g761";
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reg = <0x1e>;
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fan_gear_mode = <0>;
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fan_startv = <1>;
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pwm_polarity = <0>;
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};
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};
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