[PATCH v6 3/5] sysreset: Implement PSCI based reset to EDL mode for QCOM SoCs

[Varadarajan Narayanan]

On Fri, Jul 03, 2026 at 10:51:37AM +0530, Varadarajan Narayanan wrote:
> Quentin Schulz/Tom Rini,
>
> [ . . . ]
>
> > > > > > The issue is that the first sysreset device implementing the request_arg
> > > > > > callback will consume the args and return EPROTONOSUPPORT which will
> > > > > > stop the loop.
> > > > > >
> > > > > > Think about multiple sysreset devices, and let's say we have a new '-
> > > > > > dummy' argument to the reset CLI command, then it'll depend on the
> > > > > > registration order of the sysreset driver whether the dummy argument
> > > > > > will be handled by the qcom driver which will return -
> > > > > > EPROTONOSUPPORT since it isn't '-edl', or by the dummy sysreset driver.
> > > > > >
> > > > > > I think we should have a fourth possible return code which is "I don't
> > > > > > know how to handle this argument", e.g. à-la IRQ_NONE in Linux kernel
> > > > > > for interrupts that aren't for the device this IRQ handler was triggered
> > > > > > for. Or maybe we should really be using -EPROTONOSUPPORT for that
> > > > > > meaning and not exit the loop if that's the return code?
> > > > > >
> > > > > > Or maybe I misread or misunderstood the code?
> > > >
> > > > Following up here.
> > > >
> > >
> > > Do we end up reverting just before the release then?
> >
> > Please send it out, cc everyone, and see if that gets some response?
>
> Sorry about the delay. Will post a change shortly.

Please review [1]

Thanks
Varada

1 - https://lore.kernel.org/u-boot/20260703-walk-arg-fix-v1-1-64beca00d7e2@oss.qualcomm.com/