| Message ID | 20210709065217.6153-2-billy_tsai@aspeedtech.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Support pwm driver for aspeed ast26xx | expand |
On Fri, Jul 09, 2021 at 02:52:16PM +0800, Billy Tsai wrote: > 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. I'll say it again, the fan control h/w needs some common bindings for describing fans and fan connections to pwm and tach. I'm not going to sign off on more fan bindings just doing their own thing. > > Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com> > --- > .../bindings/hwmon/aspeed,ast2600-tach.yaml | 69 +++++++++++++++ > .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 87 +++++++++++++++++++ > .../bindings/pwm/aspeed,ast2600-pwm.yaml | 64 ++++++++++++++ > 3 files changed, 220 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 > > diff --git a/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml > new file mode 100644 > index 000000000000..a08471f96a61 > --- /dev/null > +++ b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml > @@ -0,0 +1,69 @@ > +# 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: > + reg: > + description: > + The tach channel used for this fan. > + 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 > + # The value that should be used if the property is not present > + default: 5 > + > + required: > + - reg > diff --git a/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml > new file mode 100644 > index 000000000000..ab49aff1928a > --- /dev/null > +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml > @@ -0,0 +1,87 @@ > +# 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]+)?$": > + $ref: ../pwm/aspeed,ast2600-pwm.yaml > + > + "^tach(@[0-9a-f]+)?$": > + $ref: ../hwmon/aspeed,ast2600-tach.yaml > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/clock/ast2600-clock.h> > + pwm_tach: pwm_tach@1e610000 { > + compatible = "aspeed,ast2600-pwm-tach", "syscon", "simple-mfd"; > + reg = <0x1e610000 0x100>; > + clocks = <&syscon ASPEED_CLK_AHB>; > + resets = <&syscon ASPEED_RESET_PWM>; > + > + pwm: pwm { > + compatible = "aspeed,ast2600-pwm"; > + #address-cells = <1>; > + #size-cells = <0>; > + #pwm-cells = <3>; > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_pwm0_default>; > + pwm-ch@0 { > + reg = <0>; > + aspeed,wdt-reload-enable; > + aspeed,wdt-reload-duty-point = <32>; > + }; > + }; > + > + tach: tach { > + compatible = "aspeed,ast2600-tach"; > + #address-cells = <1>; > + #size-cells = <0>; > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_tach0_default>; > + tach-ch@0 { > + reg = <0>; > + aspeed,min-rpm = <1000>; > + aspeed,pulse-pr = <2>; > + aspeed,tach-div = <5>; > + }; > + }; > + }; > diff --git a/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml > new file mode 100644 > index 000000000000..f501f8a769df > --- /dev/null > +++ b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml > @@ -0,0 +1,64 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +# Copyright (C) 2021 Aspeed, Inc. > +%YAML 1.2 > +--- > +$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 > -- > 2.25.1 > >
On 2021/7/14, 6:14 AM, "Rob Herring" <robh@kernel.org> wrote:
On Fri, Jul 09, 2021 at 02:52:16PM +0800, Billy Tsai wrote:
>> 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.
>I'll say it again, the fan control h/w needs some common bindings for
>describing fans and fan connections to pwm and tach. I'm not going to
>sign off on more fan bindings just doing their own thing.
This patch doesn't use to binding the fan control h/w. It is used to binding the two independent h/w blocks.
One is used to provide pwm output and another is used to monitor the speed of the input.
It is different from "aspeed-pwm-tacho.txt" and "npcm750-pwm-fan.txt" which only focus on fan usage.
It is more like the "kontron,sl28cpld.yaml" the device includes a fan monitor and PWM output devices.
>>
>> Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
>> ---
>> .../bindings/hwmon/aspeed,ast2600-tach.yaml | 69 +++++++++++++++
>> .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 87 +++++++++++++++++++
>> .../bindings/pwm/aspeed,ast2600-pwm.yaml | 64 ++++++++++++++
>> 3 files changed, 220 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
>>
>> diff --git a/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml
>> new file mode 100644
>> index 000000000000..a08471f96a61
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml
>> @@ -0,0 +1,69 @@
>> +# 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#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Aspeed Ast2600 Tach controller
>> +
>> +maintainers:
>> + - Billy Tsai <billy_tsai@aspeedtech.com>
>> +
>> +description: |
>> + The Aspeed Tach controller can support upto 16 fan input.
>> + This module is part of the ast2600-pwm-tach multi-function device. For more
>> + details see ../mfd/aspeed,ast2600-pwm-tach.yaml.
>> +
>> +properties:
>> + compatible:
>> + enum:
>> + - aspeed,ast2600-tach
>> +
>> + "#address-cells":
>> + const: 1
>> +
>> + "#size-cells":
>> + const: 0
>> +
>> + pinctrl-0: true
>> +
>> + pinctrl-names:
>> + const: default
>> +
>> +required:
>> + - compatible
>> + - "#address-cells"
>> + - "#size-cells"
>> +
>> +additionalProperties:
>> + type: object
>> + properties:
>> + reg:
>> + description:
>> + The tach channel used for this fan.
>> + maxItems: 1
>> +
>> + aspeed,min-rpm:
>> + description:
>> + define the minimal revolutions per minute of the measure fan
>> + used to calculate the sample period of tach
>> + default: 1000
>> +
>> + aspeed,pulse-pr:
>> + description:
>> + Value specifying the number of pulses per revolution of the
>> + monitored FAN.
>> + default: 2
>> +
>> + aspeed,tach-div:
>> + description:
>> + define the tachometer clock divider as an integer. Formula of
>> + tach clock = clock source / (2^tach-div)^2
>> + minimum: 0
>> + maximum: 15
>> + # The value that should be used if the property is not present
>> + default: 5
>> +
>> + required:
>> + - reg
>> diff --git a/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
>> new file mode 100644
>> index 000000000000..ab49aff1928a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
>> @@ -0,0 +1,87 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +# Copyright (C) 2021 Aspeed, Inc.
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mfd/aspeed,ast2600-pwm-tach.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: PWM Tach controller Device Tree Bindings
>> +
>> +description: |
>> + The PWM Tach controller is represented as a multi-function device which
>> + includes:
>> + PWM
>> + Tach
>> +
>> +maintainers:
>> + - Billy Tsai <billy_tsai@aspeedtech.com>
>> +
>> +properties:
>> + compatible:
>> + items:
>> + - enum:
>> + - aspeed,ast2600-pwm-tach
>> + - const: syscon
>> + - const: simple-mfd
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + clocks:
>> + maxItems: 1
>> +
>> + resets:
>> + maxItems: 1
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - clocks
>> + - resets
>> +
>> +patternProperties:
>> + "^pwm(@[0-9a-f]+)?$":
>> + $ref: ../pwm/aspeed,ast2600-pwm.yaml
>> +
>> + "^tach(@[0-9a-f]+)?$":
>> + $ref: ../hwmon/aspeed,ast2600-tach.yaml
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/clock/ast2600-clock.h>
>> + pwm_tach: pwm_tach@1e610000 {
>> + compatible = "aspeed,ast2600-pwm-tach", "syscon", "simple-mfd";
>> + reg = <0x1e610000 0x100>;
>> + clocks = <&syscon ASPEED_CLK_AHB>;
>> + resets = <&syscon ASPEED_RESET_PWM>;
>> +
>> + pwm: pwm {
>> + compatible = "aspeed,ast2600-pwm";
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + #pwm-cells = <3>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_pwm0_default>;
>> + pwm-ch@0 {
>> + reg = <0>;
>> + aspeed,wdt-reload-enable;
>> + aspeed,wdt-reload-duty-point = <32>;
>> + };
>> + };
>> +
>> + tach: tach {
>> + compatible = "aspeed,ast2600-tach";
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_tach0_default>;
>> + tach-ch@0 {
>> + reg = <0>;
>> + aspeed,min-rpm = <1000>;
>> + aspeed,pulse-pr = <2>;
>> + aspeed,tach-div = <5>;
>> + };
>> + };
>> + };
>> diff --git a/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml
>> new file mode 100644
>> index 000000000000..f501f8a769df
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml
>> @@ -0,0 +1,64 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +# Copyright (C) 2021 Aspeed, Inc.
>> +%YAML 1.2
>> +---
>> +$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
>> --
>> 2.25.1
>>
>>
Hi Rob,
On 2021/7/14, 12:02 PM, "Billy Tsai" <billy_tsai@aspeedtech.com> wrote:
On 2021/7/14, 6:14 AM, "Rob Herring" <robh@kernel.org> wrote:
On Fri, Jul 09, 2021 at 02:52:16PM +0800, Billy Tsai wrote:
>>> 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.
>>I'll say it again, the fan control h/w needs some common bindings for
>>describing fans and fan connections to pwm and tach. I'm not going to
>>sign off on more fan bindings just doing their own thing.
> This patch doesn't use to binding the fan control h/w. It is used to binding the two independent h/w blocks.
> One is used to provide pwm output and another is used to monitor the speed of the input.
> It is different from "aspeed-pwm-tacho.txt" and "npcm750-pwm-fan.txt" which only focus on fan usage.
> It is more like the "kontron,sl28cpld.yaml" the device includes a fan monitor and PWM output devices.
Can you give me more suggestions about this patch?
Thanks
diff --git a/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml new file mode 100644 index 000000000000..a08471f96a61 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml @@ -0,0 +1,69 @@ +# 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# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Aspeed Ast2600 Tach controller + +maintainers: + - Billy Tsai <billy_tsai@aspeedtech.com> + +description: | + The Aspeed Tach controller can support upto 16 fan input. + This module is part of the ast2600-pwm-tach multi-function device. For more + details see ../mfd/aspeed,ast2600-pwm-tach.yaml. + +properties: + compatible: + enum: + - aspeed,ast2600-tach + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + pinctrl-0: true + + pinctrl-names: + const: default + +required: + - compatible + - "#address-cells" + - "#size-cells" + +additionalProperties: + type: object + properties: + reg: + description: + The tach channel used for this fan. + maxItems: 1 + + aspeed,min-rpm: + description: + define the minimal revolutions per minute of the measure fan + used to calculate the sample period of tach + default: 1000 + + aspeed,pulse-pr: + description: + Value specifying the number of pulses per revolution of the + monitored FAN. + default: 2 + + aspeed,tach-div: + description: + define the tachometer clock divider as an integer. Formula of + tach clock = clock source / (2^tach-div)^2 + minimum: 0 + maximum: 15 + # The value that should be used if the property is not present + default: 5 + + required: + - reg diff --git a/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml new file mode 100644 index 000000000000..ab49aff1928a --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml @@ -0,0 +1,87 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2021 Aspeed, Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/aspeed,ast2600-pwm-tach.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: PWM Tach controller Device Tree Bindings + +description: | + The PWM Tach controller is represented as a multi-function device which + includes: + PWM + Tach + +maintainers: + - Billy Tsai <billy_tsai@aspeedtech.com> + +properties: + compatible: + items: + - enum: + - aspeed,ast2600-pwm-tach + - const: syscon + - const: simple-mfd + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - resets + +patternProperties: + "^pwm(@[0-9a-f]+)?$": + $ref: ../pwm/aspeed,ast2600-pwm.yaml + + "^tach(@[0-9a-f]+)?$": + $ref: ../hwmon/aspeed,ast2600-tach.yaml + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/ast2600-clock.h> + pwm_tach: pwm_tach@1e610000 { + compatible = "aspeed,ast2600-pwm-tach", "syscon", "simple-mfd"; + reg = <0x1e610000 0x100>; + clocks = <&syscon ASPEED_CLK_AHB>; + resets = <&syscon ASPEED_RESET_PWM>; + + pwm: pwm { + compatible = "aspeed,ast2600-pwm"; + #address-cells = <1>; + #size-cells = <0>; + #pwm-cells = <3>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_pwm0_default>; + pwm-ch@0 { + reg = <0>; + aspeed,wdt-reload-enable; + aspeed,wdt-reload-duty-point = <32>; + }; + }; + + tach: tach { + compatible = "aspeed,ast2600-tach"; + #address-cells = <1>; + #size-cells = <0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_tach0_default>; + tach-ch@0 { + reg = <0>; + aspeed,min-rpm = <1000>; + aspeed,pulse-pr = <2>; + aspeed,tach-div = <5>; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml new file mode 100644 index 000000000000..f501f8a769df --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml @@ -0,0 +1,64 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2021 Aspeed, Inc. +%YAML 1.2 +--- +$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 | 69 +++++++++++++++ .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 87 +++++++++++++++++++ .../bindings/pwm/aspeed,ast2600-pwm.yaml | 64 ++++++++++++++ 3 files changed, 220 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