Re: [PATCH v4 0/6] Add support i.MX95 BLK CTL module clock features

[Marco Felsch <m.felsch@pengutronix.de>]

On 24-03-18, Peng Fan wrote:
> > > > To me this sound like we can turn of the power/clock of an hardware
> > > > block which was assigned to a core running SIL-2 certified software
> > > > from an non- critical core running Linux if we follow that approach.
> > > > Also the
> > > > SIL-2 software requires the non-critical software to turn on the
> > > > power of these hardware blocks. Is this correct?
> > >
> > > Non-critical software not able to turn off power/clock of a critical
> > > resource in safety software domain.
> > > Safety software not require non-safety software to turn on power/clocks.
> > 
> > Due to lack of documentation I don't know how you implemented this in
> > HW/SW, also the system-design is telling us which parts should be seen as
> > safe and which don't. However I get your point, VPUMIX is not going to be a
> > part of the safe partition albeit it "could" due to complexity.
> 
> If safe function needs VPU feature, VPUMIX could be totally assigned to M7
> core through TRDC isolation, not assigned its BLK CTRL to system controller
> core.

Thanks for the clarification :)

Regards,
  Marco