Re: [PATCH v8 1/2] dt-bindings: hwmon: Add nct7802 bindings

[Guenter Roeck <linux@roeck-us.net>]

On Wed, Oct 20, 2021 at 12:42:12PM -0400, Oskar Senft wrote:
> This change documents the device tree bindings for the Nuvoton
> NCT7802Y driver.
> 
> Signed-off-by: Oskar Senft <osk@google.com>
> Reviewed-by: Rob Herring <robh@kernel.org>

Applied.

Thanks,
Guenter

> ---
> Changes from PATCH v7:
> - Implemented review comments:
>   - Added blank lines to increase readability.
>   - Moved "additionalProperties" up to increase readability.
> 
> Changes from PATCH v6:
> - Fixed formatting error reported by yamllint
> 
> Changes from PATCH v5:
> - Refactored to use patternProperties.
> - Added validation for sensor-type and temperature-mode.
> ---
>  .../bindings/hwmon/nuvoton,nct7802.yaml       | 145 ++++++++++++++++++
>  1 file changed, 145 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/nuvoton,nct7802.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/nuvoton,nct7802.yaml b/Documentation/devicetree/bindings/hwmon/nuvoton,nct7802.yaml
> new file mode 100644
> index 000000000000..2f0620ecccc9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/nuvoton,nct7802.yaml
> @@ -0,0 +1,145 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +
> +$id: http://devicetree.org/schemas/hwmon/nuvoton,nct7802.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Nuvoton NCT7802Y Hardware Monitoring IC
> +
> +maintainers:
> +  - Guenter Roeck <linux@roeck-us.net>
> +
> +description: |
> +  The NCT7802Y is a hardware monitor IC which supports one on-die and up to
> +  5 remote temperature sensors with SMBus interface.
> +
> +  Datasheets:
> +    https://www.nuvoton.com/export/resource-files/Nuvoton_NCT7802Y_Datasheet_V12.pdf
> +
> +additionalProperties: false
> +
> +properties:
> +  compatible:
> +    enum:
> +      - nuvoton,nct7802
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +patternProperties:
> +  "^channel@[0-3]$":
> +    type: object
> +
> +    additionalProperties: false
> +
> +    properties:
> +      reg:
> +        items:
> +          - enum:
> +              - 0    # Local Temperature Sensor ("LTD")
> +              - 1    # Remote Temperature Sensor or Voltage Sensor 1 ("RTD1")
> +              - 2    # Remote Temperature Sensor or Voltage Sensor 2 ("RTD2")
> +              - 3    # Remote Temperature Sensor or Voltage Sensor 3 ("RTD3")
> +
> +      sensor-type:
> +        items:
> +          - enum:
> +              - temperature
> +              - voltage
> +
> +      temperature-mode:
> +        items:
> +          - enum:
> +              - thermistor
> +              - thermal-diode
> +
> +    required:
> +      - reg
> +
> +    allOf:
> +      # For channels RTD1, RTD2 and RTD3, require sensor-type to be set.
> +      # Otherwise (for all other channels), do not allow temperature-mode to be
> +      # set.
> +      - if:
> +          properties:
> +            reg:
> +              items:
> +                - enum:
> +                    - 1
> +                    - 2
> +                    - 3
> +        then:
> +          required:
> +            - sensor-type
> +        else:
> +          not:
> +            required:
> +              - sensor-type
> +
> +      # For channels RTD1 and RTD2 and if sensor-type is "temperature", require
> +      # temperature-mode to be set. Otherwise (for all other channels or
> +      # sensor-type settings), do not allow temperature-mode to be set
> +      - if:
> +          properties:
> +            reg:
> +              items:
> +                - enum:
> +                    - 1
> +                    - 2
> +            sensor-type:
> +              items:
> +                - enum:
> +                    - temperature
> +        then:
> +          required:
> +            - temperature-mode
> +        else:
> +          not:
> +            required:
> +              - temperature-mode
> +
> +required:
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        nct7802@28 {
> +            compatible = "nuvoton,nct7802";
> +            reg = <0x28>;
> +
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            channel@0 { /* LTD */
> +              reg = <0>;
> +            };
> +
> +            channel@1 { /* RTD1 */
> +              reg = <1>;
> +              sensor-type = "voltage";
> +            };
> +
> +            channel@2 { /* RTD2 */
> +              reg = <2>;
> +              sensor-type = "temperature";
> +              temperature-mode = "thermal-diode";
> +            };
> +
> +            channel@3 { /* RTD3 */
> +              reg = <3>;
> +              sensor-type = "temperature";
> +            };
> +        };
> +    };