linux-kernel - Re: [PATCH 2/2] dt-bindings: hwmon: add EMC181x

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Date:   Tue, 8 Aug 2023 09:35:45 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Mark Tomlinson <mark.tomlinson@...iedtelesis.co.nz>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>
Cc:     linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        Mathew McBride <matt@...verse.com.au>
Subject: Re: [PATCH 2/2] dt-bindings: hwmon: add EMC181x

On 08/08/2023 03:31, Mark Tomlinson wrote:
> The EMC181x range are I2C temperature sensors with a varying number of
> sensors in each device. Each has one internal sensor, and one to four
> external sensor diodes.
> 
> The default range is from 0°C to +127°C, but can be extended to -64°C to
> +191°C.
> 
> Signed-off-by: Mark Tomlinson <mark.tomlinson@...iedtelesis.co.nz>

Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC. It might happen, that command when run on an older
kernel, gives you outdated entries. Therefore please be sure you base
your patches on recent Linux kernel.

You missed at least DT list (maybe more), so this won't be tested by
automated tooling. Performing review on untested code might be a waste
of time, thus I will skip this patch entirely till you follow the
process allowing the patch to be tested.

Please kindly resend and include all necessary To/Cc entries.

Limited review follows:

> ---
>  .../bindings/hwmon/microchip,emc181x.yaml     | 45 +++++++++++++++++++
>  1 file changed, 45 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,emc181x.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc181x.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc181x.yaml
> new file mode 100644
> index 000000000000..5967f98ad7ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/microchip,emc181x.yaml
> @@ -0,0 +1,45 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +

Drop blank line.

> +$id: http://devicetree.org/schemas/hwmon/microchip,emc181x.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip EMC1812/EMC1813/EMC1814/EMC1815/EMC1833 temperature sensors
> +
> +maintainers:
> +  - Mark Tomlinson <mark.tomlinson@...iedtelesis.co.nz>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - microchip,emc1812
> +      - microchip,emc1813
> +      - microchip,emc1814
> +      - microchip,emc1815
> +      - microchip,emc1833
> +
> +  reg:
> +    maxItems: 1
> +
> +  emc181x,extended-range:

Incorrect vendor prefix.

> +    description: Allow for reading of extended temperature range (-64-192C)

And why would we disallow it otherwise?

Missing type... so this wasn't even tested.

> +
> +

Just one blank line.

> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        temperature-sensor@7c {
> +            compatible = "microchip,emc1812";
> +            reg = <0x7c>;

Include optional properties in the example as well.

Best regards,
Krzysztof