linux-kernel - Re: [PATCH 1/2] dt-bindings: hwmon: Add TMP401, TMP411 and TMP43x

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Date:   Tue, 12 Apr 2022 13:53:44 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Camel Guo <camel.guo@...s.com>, linux@...ck-us.net,
        jdelvare@...e.com, robh+dt@...nel.org, krzk+dt@...nel.org
Cc:     kernel@...s.com, linux-hwmon@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Camel Guo <camelg@...s.com>
Subject: Re: [PATCH 1/2] dt-bindings: hwmon: Add TMP401, TMP411 and TMP43x

On 11/04/2022 12:03, Camel Guo wrote:
> From: Camel Guo <camelg@...s.com>
> 
> Document the TMP401, TMP411 and TMP43x device devicetree bindings
> 
> Signed-off-by: Camel Guo <camelg@...s.com>
> ---
>  .../devicetree/bindings/hwmon/ti,tmp401.yaml  | 111 ++++++++++++++++++
>  MAINTAINERS                                   |   1 +
>  2 files changed, 112 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml
> 

Thank you for your patch. There is something to discuss/improve.

> diff --git a/Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml b/Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml
> new file mode 100644
> index 000000000000..28be5cbb009b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/ti,tmp401.yaml
> @@ -0,0 +1,111 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/ti,tmp401.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TMP401, TPM411 and TMP43x temperature sensor
> +
> +maintainers:
> +  - Guenter Roeck <linux@...ck-us.net>
> +
> +description: |
> +  ±1°C Remote and Local temperature sensor
> +
> +  Datasheets:
> +  https://www.ti.com/lit/ds/symlink/tmp401.pdf
> +  https://www.ti.com/lit/ds/symlink/tmp411.pdf
> +  https://www.ti.com/lit/ds/symlink/tmp431.pdf
> +  https://www.ti.com/lit/ds/symlink/tmp435.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ti,tmp401
> +      - ti,tmp411
> +      - ti,tmp431
> +      - ti,tmp432
> +      - ti,tmp435

Blank line, please.

> +  reg:
> +    maxItems: 1
> +
> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 0
> +
> +  ti,extended-range-enable:
> +    description: |

No need for "|". Here and in most of other cases below.

> +      When set, this sensor measures over extended temperature range.
> +    type: boolean
> +
> +  ti,n-factor:
> +    description: |
> +      The value (two's complement) to be programmed in the n-factor correction
> +      register.

Do not describe the programming model (registers) but hardware property
instead.

> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    items:
> +      minimum: 0
> +      maximum: 255
> +
> +  ti,beta-compensation:
> +    description: |
> +      The value to be programmed in the beta range register.

The same, register values should not be stored in DT.

> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    items:
> +      minimum: 0
> +      maximum: 15
> +


Best regards,
Krzysztof