linux-kernel - Re: [PATCH v2 1/2] dt-bindings: hwmon: Add nct7802 bindings

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Date:   Thu, 23 Sep 2021 16:37:17 -0500
From:   Rob Herring <robh@...nel.org>
To:     Oskar Senft <osk@...gle.com>
Cc:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: hwmon: Add nct7802 bindings

On Mon, Sep 20, 2021 at 08:46:26PM -0400, Oskar Senft wrote:
> Document bindings for the Nuvoton NCT7802Y driver.
> 
> Signed-off-by: Oskar Senft <osk@...gle.com>
> ---
>  .../bindings/hwmon/nuvoton,nct7802.yaml       | 92 +++++++++++++++++++
>  1 file changed, 92 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..7512acbc9d1a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/nuvoton,nct7802.yaml
> @@ -0,0 +1,92 @@
> +# 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@...ck-us.net>

Should be someone that cares about this h/w, not who applies patches.

> +
> +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
> +
> +properties:
> +  compatible:
> +    enum:
> +      - nuvoton,nct7802
> +
> +  reg:
> +    maxItems: 1
> +
> +  temperature-sensors:
> +    type: object
> +    description:
> +      |

Drop. Not needed if formatting is not needed to be maintained. (Also 
belongs on the prior line.)

> +      Configuration for temperature sensors. If temperature-sensors
> +      is not provided at all, the internal temperature sensor will be
> +      enabled. If temperature-sensors is provided, only the listed
> +      sensors will be configured as specified. The runtime configuration
> +      for un-listed sensors will not be touched in the chip. This allows
> +      sensors to be configured at power-up time from an EEPROM connected
> +      to the chip and at the sime time allows to override these settings
> +      using device tree configuration.
> +
> +    properties:
> +      ltd:
> +        type: object
> +        description: Internal Temperature Sensor ("LTD")

No child properties?

> +
> +      rtd3:
> +        type: object
> +        description:
> +          |
> +          Remote Temperature Sensor ("RTD3"). This sensor only supports
> +          thermistor mode.

No child properties?

> +
> +    patternProperties:
> +      "^rtd[1-2]$":
> +        type: object
> +        description: Remote Temperature Sensor ("RTDx")
> +        properties:
> +          "type":

Don't need quotes.

> +            description: Sensor type (3=thermal diode, 4=thermistor).

2nd time I've seen this property this week[1]. Needs to be more specific 
than just 'type'.

> +            allOf:

Don't need allOf.

> +              - $ref: "http://devicetree.org/schemas/types.yaml#/definitions/uint32"
> +              - items:
> +                  - enum: [ 3, 4 ]
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        nct7802@28 {
> +            compatible = "nuvoton,nct7802";
> +            reg = <0x28>;
> +
> +            temperature-sensors {
> +                ltd {
> +                  status = "disabled";

Don't show status in examples.

> +                };
> +
> +                rtd1 {
> +                  status = "okay";
> +                  type = <4> /* thermistor */;
> +                };
> +            };
> +        };
> +    };
> -- 

[1] https://lore.kernel.org/all/CAL_Jsq+NXuF+F7OE3vyEbTUj6sxyMHVWHXbCuPPoFaKjpyZREQ@mail.gmail.com/