linux-kernel - [PATCH v3 3/7] ARM: dts: bcm2711: Enable PCIe controller

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Message-Id: <20191126091946.7970-4-nsaenzjulienne@suse.de>
Date:   Tue, 26 Nov 2019 10:19:41 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     andrew.murray@....com, maz@...nel.org,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Eric Anholt <eric@...olt.net>, Stefan Wahren <wahrenst@....net>
Cc:     james.quinlan@...adcom.com, mbrugger@...e.com,
        f.fainelli@...il.com, phil@...pberrypi.org, jeremy.linton@....com,
        linux-pci@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        devicetree@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 3/7] ARM: dts: bcm2711: Enable PCIe controller

This enables bcm2711's PCIe bus, which is hardwired to a VIA
Technologies XHCI USB 3.0 controller.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>

---

This will likely need a rebase once the RPi GENET patches land.

Changes since v2:
  - Remove unused interrupt-map
  - correct dma-ranges to it's full size, non power of 2 bus DMA
    constraints now supported in linux-next[1]
  - add device_type
  - rename alias from pcie_0 to pcie0

Changes since v1:
  - remove linux,pci-domain

[1] https://lkml.org/lkml/2019/11/21/235

 arch/arm/boot/dts/bcm2711.dtsi | 41 ++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index 667658497898..2e121fc8b3d0 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -288,6 +288,47 @@ IRQ_TYPE_LEVEL_LOW)>,
 		arm,cpu-registers-not-fw-configured;
 	};
 
+	scb {
+		compatible = "simple-bus";
+		#address-cells = <2>;
+		#size-cells = <1>;
+
+		ranges = <0x0 0x7c000000  0x0 0xfc000000  0x03800000>,
+			 <0x6 0x00000000  0x6 0x00000000  0x40000000>;
+
+		pcie0: pcie@...00000 {
+			compatible = "brcm,bcm2711-pcie";
+			reg = <0x0 0x7d500000 0x9310>;
+			device_type = "pci";
+			#address-cells = <3>;
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "pcie", "msi";
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143
+							IRQ_TYPE_LEVEL_HIGH>;
+			msi-controller;
+			msi-parent = <&pcie0>;
+
+			ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000
+				  0x0 0x04000000>;
+			/*
+			 * The wrapper around the PCIe block has a bug
+			 * preventing it from accessing beyond the first 3GB of
+			 * memory. As the bus DMA mask is rounded up to the
+			 * closest power of two of the dma-range size, we're
+			 * forced to set the limit at 2GB. This can be
+			 * harmlessly changed in the future once the DMA code
+			 * handles non power of two DMA limits.
+			 */
+			dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000
+				      0x0 0xc0000000>;
+			brcm,enable-ssc;
+		};
+	};
+
 	cpus: cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
-- 
2.24.0