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diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle-function-expansion.dtso b/arch/arm64/boot/dts/renesas/r8a77970-eagle-function-expansion.dtso
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+++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle-function-expansion.dtso
@@ -0,0 +1,214 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the Eagle V3M Function expansion board.
+ *
+ * Copyright (C) 2024 Niklas Söderlund <niklas.soderlund@ragnatech.se>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+ /* CN4 */
+ /* Eagle: SW18 set to OFF */
+ cvbs-in-cn4 {
+ compatible = "composite-video-connector";
+ label = "CVBS IN CN4";
+
+ port {
+ cvbs_con: endpoint {
+ remote-endpoint = <&adv7482_ain7>;
+ };
+ };
+ };
+
+ /* CN2 */
+ /* Eagle: SW35 set 5, 6 and 8 to OFF */
+ hdmi-in-cn2 {
+ compatible = "hdmi-connector";
+ label = "HDMI IN CN2";
+ type = "a";
+
+ port {
+ hdmi_in_con2: endpoint {
+ remote-endpoint = <&adv7612_in>;
+ };
+ };
+ };
+
+ /* CN3 */
+ /* Eagle: SW18 set to OFF */
+ hdmi-in-cn3 {
+ compatible = "hdmi-connector";
+ label = "HDMI IN CN3";
+ type = "a";
+
+ port {
+ hdmi_in_con: endpoint {
+ remote-endpoint = <&adv7482_hdmi>;
+ };
+ };
+ };
+};
+
+/* Disconnect MAX9286 GMSL I2C. */
+&i2c3 {
+ status = "disabled";
+};
+
+/* Connect expansion board I2C. */
+&i2c0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gpio@27 {
+ compatible = "onnn,pca9654";
+ reg = <0x27>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ vin0_adv7612_en {
+ gpio-hog;
+ gpios = <3 GPIO_ACTIVE_LOW>;
+ output-high;
+ line-name = "VIN0_ADV7612_ENn";
+ };
+ };
+
+ hdmi-decoder@4c {
+ compatible = "adi,adv7612";
+ reg = <0x4c>, <0x50>, <0x52>, <0x54>, <0x56>, <0x58>;
+ reg-names = "main", "afe", "rep", "edid", "hdmi", "cp";
+ interrupt-parent = <&gpio3>;
+ interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+ default-input = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ adv7612_in: endpoint {
+ remote-endpoint = <&hdmi_in_con2>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ adv7612_out: endpoint {
+ remote-endpoint = <&vin0_in>;
+ };
+ };
+ };
+ };
+
+ video-receiver@70 {
+ compatible = "adi,adv7482";
+ reg = <0x70 0x71 0x72 0x73 0x74 0x75
+ 0x60 0x61 0x62 0x63 0x64 0x65>;
+ reg-names = "main", "dpll", "cp", "hdmi", "edid", "repeater",
+ "infoframe", "cbus", "cec", "sdp", "txa", "txb" ;
+ interrupt-parent = <&gpio3>;
+ interrupts = <03 IRQ_TYPE_LEVEL_LOW>, <04 IRQ_TYPE_LEVEL_LOW>;
+ interrupt-names = "intrq1", "intrq2";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@7 {
+ reg = <7>;
+
+ adv7482_ain7: endpoint {
+ remote-endpoint = <&cvbs_con>;
+ };
+ };
+
+ port@8 {
+ reg = <8>;
+
+ adv7482_hdmi: endpoint {
+ remote-endpoint = <&hdmi_in_con>;
+ };
+ };
+
+ port@a {
+ reg = <10>;
+
+ adv7482_txa: endpoint {
+ clock-lanes = <0>;
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&csi40_in>;
+ };
+ };
+ };
+ };
+
+};
+
+&csi40 {
+ status = "okay";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ csi40_in: endpoint {
+ clock-lanes = <0>;
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&adv7482_txa>;
+ };
+ };
+ };
+};
+
+&pfc {
+ vin0_pins_parallel: vin0 {
+ groups = "vin0_data12", "vin0_sync", "vin0_clk", "vin0_clkenb";
+ function = "vin0";
+ };
+};
+
+&vin0 {
+ status = "okay";
+
+ pinctrl-0 = <&vin0_pins_parallel>;
+ pinctrl-names = "default";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ vin0_in: endpoint {
+ pclk-sample = <0>;
+ hsync-active = <0>;
+ vsync-active = <0>;
+ remote-endpoint = <&adv7612_out>;
+ };
+ };
+ };
+};
+
+&vin1 {
+ status = "okay";
+};
+
+&vin2 {
+ status = "okay";
+};
+
+&vin3 {
+ status = "okay";
+};