linux-kernel - Re: [PATCH 5/5] dt-bindings: pmic: mediatek: Add pmic documents

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Message-ID: <d4b3bc28-b96b-4b11-a99d-d3492ad19438@collabora.com>
Date: Fri, 14 Mar 2025 11:35:56 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, "Lu.Tang" <Lu.Tang@...iatek.com>,
 Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen <lars@...afoo.de>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Dmitry Torokhov <dmitry.torokhov@...il.com>, Lee Jones <lee@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>, Sean Wang <sean.wang@...nel.org>,
 Linus Walleij <linus.walleij@...aro.org>, Liam Girdwood
 <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Stephen Boyd <sboyd@...nel.org>, Chen Zhong <chen.zhong@...iatek.com>,
 Sen Chu <shen.chu@...iatek.com>
Cc: linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 linux-gpio@...r.kernel.org, Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH 5/5] dt-bindings: pmic: mediatek: Add pmic documents

Il 14/03/25 11:32, Krzysztof Kozlowski ha scritto:
> On 14/03/2025 08:32, Lu.Tang wrote:
> 
> Please use subject prefixes matching the subsystem. You can get them for
> example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
> your patch is touching. For bindings, the preferred subjects are
> explained here:
> https://www.kernel.org/doc/html/latest/devicetree/bindings/submitting-patches.html#i-for-patch-submitters
> 
> There is no subsystem "pmic".
> 
>> Add new pmic mfd and adc documents for mt8196
>>
>> Signed-off-by: Lu.Tang <Lu.Tang@...iatek.com>
> 
> Are you sure Latin transcription of your name includes '.' or you just
> copy-paste email address?
> 
> 
> ...
> 
>> +  - Lu Tang <lu.tang@...iatek.com>
>> +
>> +description:
>> +  The Auxiliary Analog/Digital Converter (AUXADC) is an ADC found
>> +  in some MediaTek PMICs, performing various PMIC related measurements
>> +  such as battery and PMIC internal voltage regulators temperatures,
>> +  other than voltages for various PMIC internal components.
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - mediatek,mt6363-auxadc
>> +      - mediatek,mt6373-auxadc
> 
> Just fold the device to the parent node.
> 
> 
> 
> ..
> 
> 
> 
>> diff --git a/Documentation/devicetree/bindings/mfd/mediatek,spmi-pmic.yaml b/Documentation/devicetree/bindings/mfd/mediatek,spmi-pmic.yaml
>> new file mode 100644
>> index 000000000000..a8f1231623cf
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/mediatek,spmi-pmic.yaml
> 
> Filename matching one of the compatibles, e.g. the oldest one.
> 

Yeah but besides that I don't see valid reasons why this should be a different
binding (and also why this should use a different driver, fwiw) - when it can
most probably just extend the current PMIC MFD driver... and the same goes for
the PMIC AUXADC: there's a mt6359-auxadc binding and driver that can be extended
to 6363 and 6373 rather easily.

There's nothing "really special" about those.....

Cheers

>> @@ -0,0 +1,173 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mfd/mediatek,spmi-pmic.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: MediaTek SPMI PMICs multi-function device
>> +
>> +maintainers:
>> +  - Lu Tang <lu.tang@...iatek.com>
>> +
>> +description: |
>> +  Some Mediatek PMICs are interfaced to the chip via the SPMI (System Power
>> +  Management Interface) bus.
>> +
>> +  The Mediatek SPMI series includes the MT6363, MT6373, MT6316 and other
>> +  PMICs.Please see the sub-modules below for supported features.
>> +
>> +   MT6363/MT6373 is a multifunction device with the following sub modules:
>> +  - Regulators
>> +  - ADC
>> +  - GPIO
>> +  - Keys
>> +   MT6316 is a multifunction device with the following sub modules:
>> +  - Regulators
> 
> I don't get why they are in the same schema. It would result in
> unnecessary big if:then with half of children not applicable for other
> variants.
> 
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - enum:
>> +          - mediatek,mt6363
>> +          - mediatek,mt6373
>> +          - mediatek,mt6316
> Sort these with alphanumeric order.
> 
> Best regards,
> Krzysztof