Re: [PATCH 06/14] arm64: dts: sparx5: Add basic cpu support

[Robin Murphy]

On 2020-05-15 16:09, Lars Povlsen wrote:
[...]
> > > +             cpu0: cpu@0 {
> > > +                     compatible = "arm,cortex-a53", "arm,armv8";

Side note: only one compatible string for the real CPU please, running a 
DT bindings check should complain about that.

> > > +                     device_type = "cpu";
> > > +                     reg = <0x0 0x0>;
> > > +                     enable-method = "spin-table";
> >
> > Really? This is 2020, not 2012 any more. Surely a new platform
> > boots using PSCI, and not *this*.
>
> We don't currently support PSCI. The platform does not have TrustZone,
> hence we don't use ATF.
AIUI, part of the purpose of ATF is to provide a nice standardised 
platform interface regardless of whether you care about Secure software 
or not. It shouldn't take much to knock up a trivial ATF port that just 
uses an internal spin-table for its PSCI backend - in fact I suspect 
that's probably just a copy-paste from the RPi3 port ;)

Robin.