[PATCH v2 01/18] ARM: am57xx: cl-som-am57x: dts: add basic module support

Tony Lindgren tony at atomide.com
Tue Dec 1 09:03:01 PST 2015

* Nishanth Menon <nm at ti.com> [151201 08:48]:
> On 12/01/2015 10:43 AM, Tony Lindgren wrote:
> > * Dmitry Lifshitz <lifshitz at compulab.co.il> [151201 08:26]:
> >>
> >> It might looks the same set of regulators for multiple boards,
> >> but it is not. Each board may apply its own regulators usage scheme, and
> >> this is our case (as compared to am57xx-beagle-x15.dts).
> >>
> >> For the best of my knowledge, it used to be in a common *.dtsi file (at
> >> least in early OMAP5 DT support in TI kernel tree), but then I found that
> >> PMIC registration had been moved to the boards DT files.
> > 
> > Have you actually looked at how much of the implementation is same across
> > the omap5 boards? My guess is that a whole lot is same.. See for example
> > omap5-board-common.dtsi.
> Unfortunately with DRA7 / AM57xx:
> at least 2 different PMICs -> DRA74/DRA72 evms.
> even across similar PMIC usage, different voltage rail usage accross
> evms: DRA74evm, x15/GPEVM, AM571x-IDK/AM572x-IDK -> they are not
> necessarily compatible.
> Example: some of them have Ganged voltage rail, others dont - few others
> are mixed. if you are trying to get common regulator usage -> it is
> kinda pretty hard given the freedom board designers are being given by
> TI.. OMAP5 was more controlled in terms of what specific configuration
> the board designers had to follow. that is no longer the case for
> DRA7/AM57 platforms. just my 2 cents here.

OK thanks for checking. Best to wait a bit on that then until we have
more common patterns.



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