On Fri, Oct 9, 2015 at 4:56 PM, Maxime Ripard
<maxime.rip...@free-electrons.com> wrote:
> On Wed, Oct 07, 2015 at 12:43:13AM +0800, wens Tsai wrote:
>> >> On the side, I'm wondering if we can put the voltage ranges for
>> >> important regulators directly in the axp dtsi. It's likely most
>> >> boards follow the reference design, and will use the regulators
>> >> accordingly.
>> >>
>> >> We could also do this for A31/A31s paired with AXP221/AXP221s.
>> >> Since I already have a patch for axp221.dtsi, I can incorporate
>> >> the changes.
>> >
>> > That doesn't really work unfortunately. We're seeing some combination
>> > of the PMICs and the SoCs that have different boundaries, for example,
>> > while the AXP209 is used on the A10 and A20 that have an upper
>> > boundary of 1.4V for the CPU regulator, while it's also used with the
>> > R8 that has a limit at 1.3V.
>>
>> I understand. I'm just saying it's doable for the A31/AXP221 pair,
>> and the AXP223/A23/A33 pairs. I think we won't be seeing new chips
>> paired with them. The A80 and A83 both have their own companion
>> PMICs, and the H3 doesn't seem to use one in designs we've seen.
>> The A31 and A31s have the same tolerances, as do the A23 and A33.
>
> Thing is, we can probably expect the same behaviour when the R* and H*
> designs will be out.
>
> I'd really just prefer to leave the glue between the PMIC and the SoC
> in the board DTS, and not make any assumption about what PMIC is
> associated with what SoC in the DTSI.

Got it. Hopefully I'll send out the conversion patches today.

ChenYu

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