Re: Setting power-on time on PowerMac
On Wed, Sep 23, 2020 at 10:12:13PM -0400, Charles E. Lehner wrote:
> On Tue, 22 Sep 2020 00:17:51 -0700 Brad Boyer <firstname.lastname@example.org> wrote:
> > If we manage to get it working, we will probably have to also figure
> > out how to tell which systems support this feature. The via-pmu
> > driver is used on a wide variety of systems, all the way back to
> > the earliest PowerBook models that can run Linux (and in fact the
> > PMU hardware is present even on the ones that are too old to run
> > Linux due to having no MMU like the Portable and PB100, although
> > the PMU is attached to the VIA differently on those anyway so the
> > driver wouldn't work without some significant changes).
> I'm not sure what to do about that.
There's a firmware version number that the via-pmu driver already
gets from the hardware (in pmu_version). We should probably restrict
this feature to some set of PMU versions. That can be discovered with
trial and error. Initially just restrict it to whatever version
numbers you get back on your hardware. Once the code is there, it's
easy to add more.