On 15/06/2022 09:10, Max Krummenacher wrote: > Hi > > On Tue, Jun 14, 2022 at 9:22 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote: >> >> Hi Rob, >> >> On Mon, Jun 13, 2022 at 9:15 PM Rob Herring <robh@xxxxxxxxxx> wrote: >>> On Thu, Jun 09, 2022 at 05:08:46PM +0200, Max Krummenacher wrote: >>>> From: Max Krummenacher <max.krummenacher@xxxxxxxxxxx> >>>> >>>> its power enable by using a regulator. >>>> >>>> The currently implemented PM domain providers are all specific to >>>> a particular system on chip. >>> >>> Yes, power domains tend to be specific to an SoC... 'power-domains' is >>> supposed to be power islands in a chip. Linux 'PM domains' can be >>> anything... > > I don't see why such power islands should be restricted to a SoC. You can > build the exact same idea on a PCB or even more modular designs. In the SoC these power islands are more-or-less defined. These are real regions gated by some control knob. Calling few devices on a board "power domain" does not make it a power domain. There is no grouping, there is no control knob. Aren't you now re-implementing regulator supplies? How is this different than existing supplies? Best regards, Krzysztof
