new file mode 100644
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2021 Aspeed, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/aspeed,ast2600-tach.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Aspeed Ast2600 Tach controller
+
+maintainers:
+ - Billy Tsai <billy_tsai@aspeedtech.com>
+
+description: |
+ The Aspeed Tach controller can support upto 16 fan input.
+ This module is part of the ast2600-pwm-tach multi-function device. For more
+ details see ../mfd/aspeed,ast2600-pwm-tach.yaml.
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2600-tach
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ pinctrl-0: true
+
+ pinctrl-names:
+ const: default
+
+required:
+ - compatible
+ - "#address-cells"
+ - "#size-cells"
+
+additionalProperties:
+ type: object
+ properties:
+ aspeed,tach-ch:
+ description:
+ The tach channel used for this node.
+ maxItems: 1
+
+ aspeed,min-rpm:
+ description:
+ define the minimal revolutions per minute of the measure fan
+ used to calculate the sample period of tach
+ default: 1000
+
+ aspeed,pulse-pr:
+ description:
+ Value specifying the number of pulses per revolution of the
+ monitored FAN.
+ default: 2
+
+ aspeed,tach-div:
+ description:
+ define the tachometer clock divider as an integer. Formula of
+ tach clock = clock source / (2^tach-div)^2
+ minimum: 0
+ maximum: 15
+ default: 5
+
+ required:
+ - reg
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2021 Aspeed, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/aspeed,ast2600-pwm-tach.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PWM Tach controller Device Tree Bindings
+
+description: |
+ The PWM Tach controller is represented as a multi-function device which
+ includes:
+ PWM
+ Tach
+
+maintainers:
+ - Billy Tsai <billy_tsai@aspeedtech.com>
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - aspeed,ast2600-pwm-tach
+ - const: syscon
+ - const: simple-mfd
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - resets
+
+patternProperties:
+ "^pwm(@[0-9a-f]+)?$":
+ $ref: ../pwm/aspeed,ast2600-pwm.yaml
+
+ "^tach(@[0-9a-f]+)?$":
+ $ref: ../hwmon/aspeed,ast2600-tach.yaml
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/ast2600-clock.h>
+ pwm_tach: pwm_tach@1e610000 {
+ compatible = "aspeed,ast2600-pwm-tach", "syscon", "simple-mfd";
+ reg = <0x1e610000 0x100>;
+ clocks = <&syscon ASPEED_CLK_AHB>;
+ resets = <&syscon ASPEED_RESET_PWM>;
+
+ pwm: pwm {
+ compatible = "aspeed,ast2600-pwm";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #pwm-cells = <3>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pwm0_default>;
+ };
+
+ tach: tach {
+ compatible = "aspeed,ast2600-tach";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_tach0_default>;
+ };
+ };
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2021 Aspeed, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/aspeed,ast2600-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Aspeed Ast2600 PWM controller
+
+maintainers:
+ - Billy Tsai <billy_tsai@aspeedtech.com>
+
+description: |
+ The Aspeed PWM controller can support upto 16 PWM outputs.
+ This module is part of the ast2600-pwm-tach multi-function device. For more
+ details see ../mfd/aspeed,ast2600-pwm-tach.yaml.
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2600-pwm
+
+ "#pwm-cells":
+ const: 3
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ pinctrl-0: true
+
+ pinctrl-names:
+ const: default
+
+required:
+ - compatible
+ - "#pwm-cells"
+ - "#address-cells"
+ - "#size-cells"
+
+additionalProperties:
+ description: Set extend properties for each pwm channel.
+ type: object
+ properties:
+ reg:
+ description:
+ The pwm channel index.
+ maxItems: 1
+
+ aspeed,wdt-reload-enable:
+ type: boolean
+ description:
+ Enable the function of wdt reset reload duty point.
+
+ aspeed,wdt-reload-duty-point:
+ description:
+ Define the duty point after wdt reset, 0 = 100%
+ minimum: 0
+ maximum: 255
+
+ required:
+ - reg
This patch adds device binding for aspeed pwm-tach device which is a multi-function device include pwm and tach function and pwm/tach device bindings which should be the child-node of pwm-tach device. Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com> --- .../bindings/hwmon/aspeed,ast2600-tach.yaml | 68 +++++++++++++++++ .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 76 +++++++++++++++++++ .../bindings/pwm/aspeed,ast2600-pwm.yaml | 64 ++++++++++++++++ 3 files changed, 208 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml create mode 100644 Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml create mode 100644 Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml