ARM: dts: qcom: sdx55: Add support for PCIe EP

Add support for PCIe Endpoint controller on the Qualcomm SDX55 platform.
Signed-off-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211126070520.28979-4-manivannan.sadhasivam@linaro.org

arch/arm/boot/dts/qcom-sdx55.dtsi

@@ -8,6 +8,7 @@
 
 #include <dt-bindings/clock/qcom,gcc-sdx55.h>
 #include <dt-bindings/clock/qcom,rpmh.h>
+#include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interconnect/qcom,sdx55.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/power/qcom-rpmpd.h>
@@ -391,6 +392,11 @@
 			#hwlock-cells = <1>;
 		};
 
+		tcsr: syscon@1fcb000 {
+			compatible = "syscon";
+			reg = <0x01fc0000 0x1000>;
+		};
+
 		sdhc_1: sdhci@8804000 {
 			compatible = "qcom,sdx55-sdhci", "qcom,sdhci-msm-v5";
 			reg = <0x08804000 0x1000>;
@@ -403,6 +409,45 @@
 			status = "disabled";
 		};
 
+		pcie_ep: pcie-ep@40000000 {
+			compatible = "qcom,sdx55-pcie-ep";
+			reg = <0x01c00000 0x3000>,
+			      <0x40000000 0xf1d>,
+			      <0x40000f20 0xc8>,
+			      <0x40001000 0x1000>,
+			      <0x40002000 0x10000>,
+			      <0x01c03000 0x3000>;
+			reg-names = "parf", "dbi", "elbi", "atu", "addr_space",
+				    "mmio";
+
+			qcom,perst-regs = <&tcsr 0xb258 0xb270>;
+
+			clocks = <&gcc GCC_PCIE_AUX_CLK>,
+				 <&gcc GCC_PCIE_CFG_AHB_CLK>,
+				 <&gcc GCC_PCIE_MSTR_AXI_CLK>,
+				 <&gcc GCC_PCIE_SLV_AXI_CLK>,
+				 <&gcc GCC_PCIE_SLV_Q2A_AXI_CLK>,
+				 <&gcc GCC_PCIE_SLEEP_CLK>,
+				 <&gcc GCC_PCIE_0_CLKREF_CLK>;
+			clock-names = "aux", "cfg", "bus_master", "bus_slave",
+				      "slave_q2a", "sleep", "ref";
+
+			interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "global", "doorbell";
+			reset-gpios = <&tlmm 57 GPIO_ACTIVE_LOW>;
+			wake-gpios = <&tlmm 53 GPIO_ACTIVE_LOW>;
+			resets = <&gcc GCC_PCIE_BCR>;
+			reset-names = "core";
+			power-domains = <&gcc PCIE_GDSC>;
+			phys = <&pcie0_lane>;
+			phy-names = "pciephy";
+			max-link-speed = <3>;
+			num-lanes = <2>;
+
+			status = "disabled";
+		};
+
 		remoteproc_mpss: remoteproc@4080000 {
 			compatible = "qcom,sdx55-mpss-pas";
 			reg = <0x04080000 0x4040>;