linux-kernel - [PATCH v2 2/3] arm64: dts: rockchip: Add PCIe Gen2x1 controller for RK3528

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Message-ID: <20250918153057.56023-3-ziyao@disroot.org>
Date: Thu, 18 Sep 2025 15:30:56 +0000
From: Yao Zi <ziyao@...root.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Shawn Lin <shawn.lin@...k-chips.com>,
	Simon Xue <xxm@...k-chips.com>
Cc: linux-pci@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Jonas Karlman <jonas@...boo.se>,
	Chukun Pan <amadeus@....edu.cn>,
	Yao Zi <ziyao@...root.org>
Subject: [PATCH v2 2/3] arm64: dts: rockchip: Add PCIe Gen2x1 controller for RK3528

Describes the PCIe Gen2x1 controller integrated in RK3528 SoC. The SoC
doesn't provide a separate MSI controller, thus the one integrated in
designware PCIe IP must be used.

Signed-off-by: Yao Zi <ziyao@...root.org>
Reviewed-by: Jonas Karlman <jonas@...boo.se>
---
 arch/arm64/boot/dts/rockchip/rk3528.dtsi | 56 +++++++++++++++++++++++-
 1 file changed, 55 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3528.dtsi b/arch/arm64/boot/dts/rockchip/rk3528.dtsi
index d5f8f7b9bf01..d402f2828814 100644
--- a/arch/arm64/boot/dts/rockchip/rk3528.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3528.dtsi
@@ -7,6 +7,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/phy/phy.h>
 #include <dt-bindings/pinctrl/rockchip.h>
 #include <dt-bindings/clock/rockchip,rk3528-cru.h>
 #include <dt-bindings/power/rockchip,rk3528-power.h>
@@ -278,10 +279,63 @@ gmac0_clk: clock-gmac50m {
 
 	soc {
 		compatible = "simple-bus";
-		ranges = <0x0 0xfe000000 0x0 0xfe000000 0x0 0x2000000>;
+		ranges = <0x0 0xfc000000 0x0 0xfc000000 0x0 0x44000000>;
 		#address-cells = <2>;
 		#size-cells = <2>;
 
+		pcie: pcie@...00000 {
+			compatible = "rockchip,rk3528-pcie",
+				     "rockchip,rk3568-pcie";
+			reg = <0x0 0xfe000000 0x0 0x400000>,
+			      <0x0 0xfe4f0000 0x0 0x010000>,
+			      <0x0 0xfc000000 0x0 0x100000>;
+			reg-names = "dbi", "apb", "config";
+			bus-range = <0x0 0xff>;
+			clocks = <&cru ACLK_PCIE>, <&cru HCLK_PCIE_SLV>,
+				 <&cru HCLK_PCIE_DBI>, <&cru PCLK_PCIE>,
+				 <&cru CLK_PCIE_AUX>;
+			clock-names = "aclk_mst", "aclk_slv",
+				      "aclk_dbi", "pclk",
+				      "aux";
+			device_type = "pci";
+			interrupts = <GIC_SPI 156 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "sys", "pmc", "msg", "legacy", "err",
+					  "msi";
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0 0 0 1 &pcie_intc 0>,
+					<0 0 0 2 &pcie_intc 1>,
+					<0 0 0 3 &pcie_intc 2>,
+					<0 0 0 4 &pcie_intc 3>;
+			linux,pci-domain = <0>;
+			max-link-speed = <2>;
+			num-lanes = <1>;
+			phys = <&combphy PHY_TYPE_PCIE>;
+			phy-names = "pcie-phy";
+			power-domains = <&power RK3528_PD_VPU>;
+			ranges = <0x01000000 0x0 0xfc100000 0x0 0xfc100000 0x0 0x00100000>,
+				 <0x02000000 0x0 0xfc200000 0x0 0xfc200000 0x0 0x01e00000>,
+				 <0x03000000 0x1 0x00000000 0x1 0x00000000 0x0 0x40000000>;
+			resets = <&cru SRST_PCIE_POWER_UP>, <&cru SRST_P_PCIE>;
+			reset-names = "pwr", "pipe";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			status = "disabled";
+
+			pcie_intc: legacy-interrupt-controller {
+				interrupt-controller;
+				interrupt-parent = <&gic>;
+				interrupts = <GIC_SPI 155 IRQ_TYPE_EDGE_RISING>;
+				#address-cells = <0>;
+				#interrupt-cells = <1>;
+			};
+		};
+
 		gic: interrupt-controller@...01000 {
 			compatible = "arm,gic-400";
 			reg = <0x0 0xfed01000 0 0x1000>,
-- 
2.50.1