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

[Rob Herring]

On Fri, Oct 9, 2015 at 8:45 AM, Liviu Dudau <Liviu.Dudau@xxxxxxx> 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@xxxxxxx>
>
> [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@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. Perhaps the firmware did not
setup something correctly.

> +               device_type = "pci";
> +               reg = <0 0x40000000 0 0x10000000>;      /* ECAM config space */
> +               bus-range = <0 255>;
> +               linux,pci-domain = <0>;
> +               #address-cells = <3>;
> +               #size-cells = <2>;
> +               dma-coherent;
> +               ranges = <0x01000000 0x00 0x5f800000 0x00 0x5f800000 0x0 0x00800000
> +                         0x02000000 0x00 0x50000000 0x00 0x50000000 0x0 0x08000000
> +                         0x42000000 0x40 0x00000000 0x40 0x00000000 0x1 0x00000000>;
> +               #interrupt-cells = <1>;
> +               interrupt-map-mask = <0 0 0 7>;
> +               interrupt-map = <0 0 0 1 &gic 0 0 0 136 4
> +                                0 0 0 2 &gic 0 0 0 137 4
> +                                0 0 0 3 &gic 0 0 0 138 4
> +                                0 0 0 4 &gic 0 0 0 139 4>;
> +               msi-parent = <&v2m_0>;
> +       };
>  };
>
>  &memtimer {
> --
> 2.6.0
>
> --
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