diff mbox

[v2,4/5] arm64: Juno: Add support for the PCIe host bridge on Juno R1

Message ID 1444409849-5685-5-git-send-email-Liviu.Dudau@arm.com
State New
Headers show

Commit Message

Liviu Dudau Oct. 9, 2015, 4:57 p.m. UTC
Juno R1 board sports a functional PCIe host bridge that is
compliant with the SBSA standard found [1] here. 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@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(+)

2.6.0

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Comments

Mark Rutland Oct. 9, 2015, 5:04 p.m. UTC | #1
On Fri, Oct 09, 2015 at 05:57:28PM +0100, Liviu Dudau wrote:
> Juno R1 board sports a functional PCIe host bridge that is
> compliant with the SBSA standard found [1] here. 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@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
> @@ -109,7 +109,26 @@
>  
>  	#include "juno-base.dtsi"
>  
> +	pcie-controller@40000000 {
> +		compatible = "arm,juno-r1-pcie", "plda,xpressrich3", "pci-host-ecam-generic";

Judging by a PLDA press release [1], it looks like Juno uses
"XpressRICH3-AXI" [2] rather than "XpressRICH3 for ASIC" [3].

So sorry to bikeshed the name I suggested, but it's probably best to
s/plda,xpressrich3/plda,xpressrich3-axi/

With that:

Acked-by: Mark Rutland <mark.rutland@arm.com>

I assume that can be fixed up when picking (or prior to a pull) without
the need to repost.

> +		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>;

Minor nit for ranges and interrupt-map, but it'd be good to bracket
entries individually, for consistency with what we do elsewhere.

Thanks,
Mark.

[1] https://www.plda.com/arm-0
[2] https://www.plda.com/products/asicfpgasoc-ip/pcie-soft-ip/pcie-30-soft-ip-arm-soc/xpressrich3-axi
[3] https://www.plda.com/products/asicfpgasoc-ip/pcie-soft-ip/pcie-30-soft-ip/xpressrich3-pcie-30
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Rob Herring Oct. 9, 2015, 5:49 p.m. UTC | #2
On Fri, Oct 9, 2015 at 12:04 PM, Mark Rutland <mark.rutland@arm.com> wrote:
> On Fri, Oct 09, 2015 at 05:57:28PM +0100, Liviu Dudau wrote:
>> Juno R1 board sports a functional PCIe host bridge that is
>> compliant with the SBSA standard found [1] here. 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@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
>> @@ -109,7 +109,26 @@
>>
>>       #include "juno-base.dtsi"
>>
>> +     pcie-controller@40000000 {
>> +             compatible = "arm,juno-r1-pcie", "plda,xpressrich3", "pci-host-ecam-generic";
>
> Judging by a PLDA press release [1], it looks like Juno uses
> "XpressRICH3-AXI" [2] rather than "XpressRICH3 for ASIC" [3].
>
> So sorry to bikeshed the name I suggested, but it's probably best to
> s/plda,xpressrich3/plda,xpressrich3-axi/
>
> With that:
>
> Acked-by: Mark Rutland <mark.rutland@arm.com>
>
> I assume that can be fixed up when picking (or prior to a pull) without
> the need to repost.

Also, now these strings need to be documented. :)

I would just adding to the generic host doc.

Rob
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diff mbox

Patch

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
@@ -109,7 +109,26 @@ 
 
 	#include "juno-base.dtsi"
 
+	pcie-controller@40000000 {
+		compatible = "arm,juno-r1-pcie", "plda,xpressrich3", "pci-host-ecam-generic";
+		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 {
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