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

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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.


-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com



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