[U-Boot] [PATCHv2 2/3] ARMv8/layerscape: Add FSL PPA support

[Bhupesh Sharma]

> -----Original Message-----
> From: Scott Wood [mailto:oss at buserror.net]
> Sent: Saturday, January 23, 2016 1:39 AM
> To: york sun; Zhiqiang Hou; u-boot at lists.denx.de;
> albert.u.boot at aribaud.net; Mingkai.hu at freescale.com; Stuart Yoder;
> leoli at freescale.com; prabhakar at freescale.com;
> bhupesh.sharma at freescale.com; Zhiqiang Hou
> Subject: Re: [PATCHv2 2/3] ARMv8/layerscape: Add FSL PPA support
> 
> On Fri, 2016-01-22 at 20:05 +0000, york sun wrote:
> > On 01/21/2016 01:53 AM, Zhiqiang Hou wrote:
> > > From: Hou Zhiqiang <Zhiqiang.Hou at freescale.com>
> > >
> > > The FSL Primary Protected Application (PPA) is a software component
> > > loaded during boot which runs in TrustZone and remains resident
> > > after boot.
> > >
> > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at freescale.com>
> > > ---
> > > Tested on LS1043A RDB board
> > >
> >
> > I presume PSCI is implemented in PPA. How does the SMP boot flow
> > change with PPA? U-boot has to remain functional in the absence of PPA,
> right?
> >
> > Would it be possible to write a readme for PPA?
> 
> Also, how does the devicetree get updated to indicate the presence of
> PSCI?
> 

One needs to add PSCI node in the DTS for the same, claiming support for PSCI specification.
The cpu.enable_method needs to be changed from spin-table to psci as well.

See http://lxr.free-electrons.com/source/Documentation/devicetree/bindings/arm/psci.txt for details.