On Mon, Mar 13, 2017 at 2:13 PM, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote: > Hi Arnd, > > On Mon, Mar 13, 2017 at 2:06 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote: >> On Mon, Mar 13, 2017 at 1:46 PM, Geert Uytterhoeven >> <geert@xxxxxxxxxxxxxx> wrote: >>> On Mon, Mar 13, 2017 at 1:41 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote: >>>> On Thu, Mar 9, 2017 at 7:18 PM, Geert Uytterhoeven >>>> I'd prefer to not have to do the early registration at all and have fewer >>>> special cases. Can you list a specific example that requires this? >>> >>> The specific example is the Renesas R-Car SYSC driver, which manages PM >>> Domains and thus needs to be initialized from an early_initcall. >> >> Ok, and what prevents us from using information in DT to detect which >> variant we have? Is this a case of absolutely having to know the exact >> hardware revision at the time of initialization, or is it just to simplify the >> implementation of the SYSC driver? > > The former. > Preproduction versions of R-Car H3 have an additional power area, which no > longer exists on H3 ES2.0. Ok. I'm still not happy about adding the workaround, but this seems like a reasonable requirement, assuming that the preproduction versions of R-Car H3 are important enough to you that supporting them in mainline helps you get your work done better. Please add the explanation to the changelog, along with my Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
