Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <081a71b2-951b-76bc-82d5-687a9942450a@linaro.org>
Date:   Thu, 13 Apr 2023 14:51:31 +0200
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.9.1
Subject: Re: Unclear what to do with compatibility
Content-Language: en-US
To:     Daniel Matyas <daniel.matyas@analog.com>
Cc:     corbet@lwn.net, devicetree@vger.kernel.org, jdelvare@suse.com,
        krzysztof.kozlowski+dt@linaro.org, linux-doc@vger.kernel.org,
        linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux@roeck-us.net, robh+dt@kernel.org
References: <342b3e6c-fd1b-d256-bcc2-2b9bda206b60@linaro.org>
 <20230413123039.22473-1-daniel.matyas@analog.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20230413123039.22473-1-daniel.matyas@analog.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

On 13/04/2023 14:30, Daniel Matyas wrote:
> MAX31827 is a low-power temperature switch with I2C interface.

You sent a new patch. With a weird subject. I don't understand exactly
what is this.

> 
> The device is a ±1°C accuracy from -40°C to +125°C
> (12 bits) local temperature switch and sensor with I2C/SM-
> Bus interface. The combination of small 6-bump wafer-lev-
> el package (WLP) and high accuracy makes this temper-
> ature sensor/switch ideal for a wide range of applications.
> 
> Signed-off-by: Daniel Matyas <daniel.matyas@analog.com>
> ---
>  .../bindings/hwmon/adi,max31827.yaml          | 51 +++++++++++++++++++
>  MAINTAINERS                                   |  7 +++
>  2 files changed, 58 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/adi,max31827.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/adi,max31827.yaml b/Documentation/devicetree/bindings/hwmon/adi,max31827.yaml
> new file mode 100644
> index 000000000000..37177eb9c039
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/adi,max31827.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/adi,max31827.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices MAX31827, MAX31828, MAX31829 Low-Power Temperature Switch
> +
> +maintainers:
> +  - Daniel Matyas <daniel.matyas@analog.com>
> +
> +description: |
> +  Analog Devices MAX31827, MAX31828, MAX31829 Low-Power Temperature Switch with
> +  I2C Interface
> +  https://www.analog.com/media/en/technical-documentation/data-sheets/MAX31827-MAX31829.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,max31827
> +      - adi,max31828
> +      - adi,max31829
> +
> 
> I am really sorry, but I do not understand what I should do.
> 
> Should I add oneOf or items to the compatibility property?

The devices should be marked as compatible with each other, so you can
drop useless match table entries.

https://elixir.bootlin.com/linux/v6.3-rc6/source/Documentation/devicetree/bindings/sound/nvidia,tegra210-ope.yaml#L31

and fix this in the driver.


Best regards,
Krzysztof