Re: [PATCH v24 00/12] Implement PSCI reboot mode driver for PSCI resets

[Shivendra Pratap]

On 9/4/2026 12:47 PM, Ulf Hansson wrote:
> On Thu, Sep 3, 2026 at 6:04 PM Lee Jones <lee@xxxxxxxxxx> wrote:
> > On Mon, 03 Aug 2026, Shivendra Pratap wrote:
> >
> > > Userspace should be able to initiate device reboots using the various
> > > PSCI SYSTEM_RESET and SYSTEM_RESET2 types defined by PSCI spec. This
> > > patch series introduces psci-reboot-mode driver that will induce
> > > command-based resets to psci driver for executing the device reset.
> >
> > The more I read through this submission, the more convinced I get that
> > it does not belong in MFD.  This is a potentially nice "architectural
> > workaround" if it a) didn't break some of MFD's fundamental "real
> > devices only" rules, of which cpuidle and reboot-mode certainly are not
> > and b) didn't require a massive expansion of what the MFD core is
> > designed to do.  I am more that a little uncomfortable with the 150
> > lines being added to MFD core support this workaround.
> >
> > My best suggestion so far would be to base these changes inside
> > drivers/firmware/psci and use the aux bus to communicate with the
> > various components.
>
> We had some off list discussions about this as well and it seems like
> we are in agreement. What you are suggesting makes perfect sense to
> me.

Thanks for reviews. I will move this to Aux and re-post.

thanks,
Shivendra