linux-kernel - Re: [PATCH 6/6] dt-bindings: hwmon: jedec,jc42: add nxp,se97b

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Message-ID: <8871dd77-f9f1-bf25-78ad-48f97efcf7d9@canonical.com>
Date:   Fri, 24 Sep 2021 08:57:44 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jiri Kosina <trivial@...nel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] dt-bindings: hwmon: jedec,jc42: add nxp,se97b

On 23/09/2021 23:16, Rob Herring wrote:
> On Mon, Sep 20, 2021 at 08:21:14PM +0200, Krzysztof Kozlowski wrote:
>> Document bindings for NXP SE97B, a DDR memory module temperature sensor
>> with integrated SPD and EEPROM via Atmel's AT24 interface.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
>> ---
>>  Documentation/devicetree/bindings/hwmon/jedec,jc42.yaml | 9 +++++++++
>>  1 file changed, 9 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/hwmon/jedec,jc42.yaml b/Documentation/devicetree/bindings/hwmon/jedec,jc42.yaml
>> index a7bb4e3a1c46..0e49b3901161 100644
>> --- a/Documentation/devicetree/bindings/hwmon/jedec,jc42.yaml
>> +++ b/Documentation/devicetree/bindings/hwmon/jedec,jc42.yaml
>> @@ -10,6 +10,14 @@ maintainers:
>>    - Jean Delvare <jdelvare@...e.com>
>>    - Guenter Roeck <linux@...ck-us.net>
>>  
>> +select:
>> +  properties:
>> +    compatible:
>> +      const: jedec,jc-42.4-temp
>> +
>> +  required:
>> +    - compatible
>> +
> 
> Is this supposed to be in the last patch? And why is it needed?

Yes, this is here on purpose because of nxp,se97b which is sensor with
at24-compatible EEPROM.

arch/arm/boot/dts/at91-nattis-2-natte-2.dts:
169         temp@18 {
170                 compatible = "nxp,se97b", "jedec,jc-42.4-temp";

171                 reg = <0x18>;
172                 smbus-timeout-disable;
173         };
174
175         eeprom@50 {
176                 compatible = "nxp,se97b", "atmel,24c02";
177                 reg = <0x50>;
178                 pagesize = <16>;

Without the select, dtbs_check was complaining about the second node:

eeprom@50: compatible: 'oneOf' conditional failed, one must be fixed:
	['nxp,se97b', 'atmel,24c02'] is too long
	Additional items are not allowed ('atmel,24c02' was unexpected)
	'jedec,jc-42.4-temp' was expected
	From schema:
/home/dev/linux/linux/Documentation/devicetree/bindings/hwmon/jedec,jc42.yaml

eeprom@50: 'pagesize' does not match any of the regexes: 'pinctrl-[0-9]+'
	From schema:
/home/dev/linux/linux/Documentation/devicetree/bindings/hwmon/jedec,jc42.yaml


>>  properties:
>>    compatible:
>>      oneOf:
>> @@ -31,6 +39,7 @@ properties:
>>                - microchip,mcp98244
>>                - microchip,mcp9843
>>                - nxp,se97
>> +              - nxp,se97b
>>                - nxp,se98
>>                - onnn,cat6095
>>                - onnn,cat34ts02
>> -- 
>> 2.30.2
>>
>>


Best regards,
Krzysztof