linux-kernel - Re: [PATCH 1/2] dt-bindings: mfd: mt6397: Add compatibles for MT6331 RTC and keys

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Date:   Thu, 16 Jun 2022 10:36:23 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        matthias.bgg@...il.com, johnson.wang@...iatek.com,
        hsin-hsiung.wang@...iatek.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: mfd: mt6397: Add compatibles for MT6331
 RTC and keys

Il 15/06/22 23:48, Lee Jones ha scritto:
> On Fri, 20 May 2022, AngeloGioacchino Del Regno wrote:
> 
>> MT6331 is a multifunction device, providing RTC, keys and more: add
> 
> No such thing as an MFD.  What does the data-sheet call it?

Datasheets for this chip, or the other (6332) are not public ... and I have no
access to any: whatever you see here is done with an accurate reading of downstream
drivers and a lot of debugging and research.

Anyway, MT6331 is a PMIC, MT6332 is also a PMIC (in this case, a companion pmic).

> 
> What "more"?
> 

More is voltage regulators, display backlight PWM, LED PWM, some GPIOs, battery
charging, fuel gauge... and I think nothing else.

Anyway, okay I will list things out in the commit description.

>> the necessary compatibles to start implementing the basics.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
>> ---
>>   Documentation/devicetree/bindings/mfd/mt6397.txt | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/mt6397.txt b/Documentation/devicetree/bindings/mfd/mt6397.txt
>> index d59063503b0d..2a9533c47365 100644
>> --- a/Documentation/devicetree/bindings/mfd/mt6397.txt
>> +++ b/Documentation/devicetree/bindings/mfd/mt6397.txt
>> @@ -30,6 +30,7 @@ Optional subnodes:
>>   - rtc
>>   	Required properties: Should be one of follows
>>   		- compatible: "mediatek,mt6323-rtc"
>> +		- compatible: "mediatek,mt6331-rtc"
>>   		- compatible: "mediatek,mt6358-rtc"
>>   		- compatible: "mediatek,mt6397-rtc"
>>   	For details, see ../rtc/rtc-mt6397.txt
>> @@ -55,6 +56,7 @@ Optional subnodes:
>>   - keys
>>   	Required properties:
>>   		- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
>> +			      or "mediatek,mt6331-keys"
> 
> Please place these in a vertical list.

Will do!

Regards,
Angelo