ARM : dts : support realtek r8125 ethernet driver

Adding PCI ID's for realtek r8125B hardware

Change-Id: I74634e907ea25e74cf56e4f628f83ec7de4b77d1
Signed-off-by: Sunil Paidimarri <hisunil@codeaurora.org>

Documentation/devicetree/bindings/net/r8125

@@ -0,0 +1,33 @@
+Realtek  r8125B Ethernet Controller
+
+Required properties:
+
+- compatible : should be "realtek,rtl-8125"
+
+If SMMU is present, also use:
+
+- qcom,smmu : if present, SMMU attach is performed
+- qcom,smmu-iova-base : SMMU IOVA start address the device can access
+- qcom,smmu-iova-size : SMMU IOVA size the device can access
+
+Optional Properties:
+
+- qcom,smmu-attr-fastmap : Enables SMMU fastmap
+- qcom,smmu-attr-atomic : Enables DMA alloc using GFP_ATOMIC
+
+Example:
+
+&pcie_rc0 {
+
+	r8125_x1: qcom,r8125@0 {
+		compatible = realtek,rtl-8125";
+
+		qcom,smmu;
+		qcom,smmu-iova-base = /bits/ 64 <0x0>;
+		qcom,smmu-iova-size = /bits/ 64 <0x100000000>;
+
+		qcom,smmu-attr-atomic;
+		qcom,smmu-attr-fastmap;
+	};
+};
+

arch/arm64/boot/dts/qcom/sdxprairie-qcom-smmu.dtsi

@@ -0,0 +1,38 @@
+/* Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+
+&pcie0_rp {
+	realtek,rtl8125@pcie0_rp {
+		reg = <0 0 0 0 0>;
+
+		compatible = "realtek,rtl-8125";
+
+		pci-ids =
+		   "10ec:8125",
+		   "10ec:3000";
+
+		qcom,smmu;
+
+		/* IOVA range is restricted to avoid conflicts with PCI BAR
+		 * space, Q6 SMEM and IOVA spaces used by peripherals that are
+		 * currently attached to IPA.
+		 */
+		qcom,smmu-iova-base = /bits/ 64 <0x80000000>;
+		qcom,smmu-iova-size = /bits/ 64 <0x0FE40000>;
+
+		qcom,smmu-attr-atomic;
+		qcom,smmu-attr-fastmap;
+
+	};
+};
+

arch/arm64/boot/dts/qcom/sdxprairie.dtsi

@@ -1612,6 +1612,7 @@
 #include "sdxprairie-coresight.dtsi"
 #include "sdxprairie-aqc.dtsi"
 #include "sdxprairie-thermal.dtsi"
+#include "sdxprairie-qcom-smmu.dtsi"
 
 &gdsc_usb30 {
 	status = "ok";