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cefb89592e
Adds support for the AST2700 PWM/Tach controller by extending the compatible string enumeration in the device tree binding. The AST2700 PWM/Tach hardware is compatible with the existing binding schema and requires no additional properties or modifications beyond the new compatible string. Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20251120-upstream_pwm_tach-v3-1-eaa2f9b300a2@aspeedtech.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
75 lines
1.6 KiB
YAML
75 lines
1.6 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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# Copyright (C) 2023 Aspeed, Inc.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/hwmon/aspeed,g6-pwm-tach.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ASPEED G6 PWM and Fan Tach controller
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maintainers:
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- Billy Tsai <billy_tsai@aspeedtech.com>
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description: |
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The ASPEED PWM controller can support up to 16 PWM outputs.
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The ASPEED Fan Tacho controller can support up to 16 fan tach input.
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They are independent hardware blocks, which are different from the
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previous version of the ASPEED chip.
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properties:
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compatible:
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oneOf:
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- items:
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- const: aspeed,ast2700-pwm-tach
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- const: aspeed,ast2600-pwm-tach
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- const: aspeed,ast2600-pwm-tach
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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resets:
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maxItems: 1
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"#pwm-cells":
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const: 3
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patternProperties:
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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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- tach-ch
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required:
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- reg
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- clocks
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- resets
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- "#pwm-cells"
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- compatible
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/aspeed-clock.h>
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pwm_tach: pwm-tach-controller@1e610000 {
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compatible = "aspeed,ast2600-pwm-tach";
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reg = <0x1e610000 0x100>;
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clocks = <&syscon ASPEED_CLK_AHB>;
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resets = <&syscon ASPEED_RESET_PWM>;
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#pwm-cells = <3>;
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fan-0 {
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tach-ch = /bits/ 8 <0x0>;
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pwms = <&pwm_tach 0 40000 0>;
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};
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fan-1 {
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tach-ch = /bits/ 8 <0x1 0x2>;
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pwms = <&pwm_tach 1 40000 0>;
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};
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};
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