[PATCH 3/4] arm64: Juno: Add support for the PCIe host bridge on Juno R1

[Will Deacon]

On Fri, Oct 09, 2015 at 03:11:07PM +0100, Liviu Dudau wrote:
> On Fri, Oct 09, 2015 at 08:54:33AM -0500, Rob Herring wrote:
> > On Fri, Oct 9, 2015 at 8:45 AM, Liviu Dudau <Liviu.Dudau at arm.com> wrote:
> > > Juno R1 board sports a functional PCIe host bridge that is
> > > compliant with the SBSA standard found here[1]. With the right
> > > firmware that initialises the XpressRICH3 controller one can
> > > use the generic Host Bridge driver to use the PCIe hardware.
> > >
> > > Signed-off-by: Liviu Dudau <Liviu.Dudau at arm.com>
> > >
> > > [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0029a/
> > > ---
> > >  arch/arm64/boot/dts/arm/juno-r1.dts | 20 ++++++++++++++++++++
> > >  1 file changed, 20 insertions(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/arm/juno-r1.dts b/arch/arm64/boot/dts/arm/juno-r1.dts
> > > index c627511..a702a6b 100644
> > > --- a/arch/arm64/boot/dts/arm/juno-r1.dts
> > > +++ b/arch/arm64/boot/dts/arm/juno-r1.dts
> > > @@ -109,6 +109,26 @@
> > >
> > >         #include "juno-base.dtsi"
> > >
> > > +       pcie-controller at 40000000 {
> > > +               compatible = "pci-host-ecam-generic";
> > 
> > I think this is the first case of real h/w using this. We should have
> > a specific compatible here additionally.
> 
> Or maybe I can claim the use of the string on account on being the first
> on arm64 ;)

This is already being used on arm64 with kvmtool, qemu, the ARM fastmodel
and AMD Seattle.

Will