Re: [PATCH v5 2/2] dt-bindings: rtc: add max313xx RTCs

[Krzysztof Kozlowski]

On 04/04/2023 11:56, Alexandre Belloni wrote:
> On 04/04/2023 10:14:33+0200, Krzysztof Kozlowski wrote:
>> On 04/04/2023 09:44, Alexandre Belloni wrote:
>>>>
>>>>> charging will always
>>>>> enable a diode, select a resistor and then have or not an extra diode.
>>>>> Figure2 of the MAX31329 datasheet is great.
>>>>
>>>> So the diode is in the max313xx? Then why enabling it is a property of
>>>> DT? Either this should be inferred from compatible or is even a policy,
>>>> not a DT property. Just because device has a register for something, is
>>>> not an argument that "something" should be in DT.
>>>
>>> Well, it depends on the battery that is installed on the board so it
>>> makes sense to have it in DT.
>>
>> OK, that would be a good reason, but I wonder why? Why choosing diode or
>> not depends on the battery? Wouldn't you always want to have the diode?
>>
> 
> It limits the maximum current used to charge the battery or supercap to
> not exceed what is allowed.

and I still wonder why someone would like to allow exceeding what is
allowed. IOW, what is the use case to disable the diode?

Best regards,
Krzysztof