[PATCH v3 4/5] arm64: dts: renesas: eagle: Add GMSL .dtsi

[Jacopo Mondi <jacopo+renesas@jmondi.org>]

From: Kieran Bingham <kieran.bingham@ideasonboard.com>

Describe the FAKRA connector available on Eagle board that allows
connecting GMSL camera modules such as IMI RDACM20 and RDACM21.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
 arch/arm64/boot/dts/renesas/eagle-gmsl.dtsi | 186 ++++++++++++++++++++
 1 file changed, 186 insertions(+)
 create mode 100644 arch/arm64/boot/dts/renesas/eagle-gmsl.dtsi

diff --git a/arch/arm64/boot/dts/renesas/eagle-gmsl.dtsi b/arch/arm64/boot/dts/renesas/eagle-gmsl.dtsi
new file mode 100644
index 000000000000..1836bca1e8b2
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/eagle-gmsl.dtsi
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Device Tree Source (overlay) for the Eagle V3M GMSL connectors
+ *
+ * Copyright (C) 2017 Ideas on Board <kieran.bingham@ideasonboard.com>
+ * Copyright (C) 2021 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ *
+ * This overlay allows you to define GMSL cameras connected to the FAKRA
+ * connectors on the Eagle-V3M (or compatible) board.
+ *
+ * The following cameras are currently supported:
+ *    "imi,rdacm20"
+ *    "imi,rdacm21"
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+
+/*
+ * Select which cameras are in use:
+ * #define EAGLE_CAMERA0_RDACM20
+ * #define EAGLE_CAMERA0_RDACM21
+ *
+ * The two camera modules are configured with different image formats
+ * and cannot be mixed.
+ */
+#define EAGLE_CAMERA0_RDACM21
+#define EAGLE_CAMERA1_RDACM21
+#define EAGLE_CAMERA2_RDACM21
+#define EAGLE_CAMERA3_RDACM21
+
+/* Set the compatible string based on the camera model. */
+#if defined(EAGLE_CAMERA0_RDACM21) || defined(EAGLE_CAMERA1_RDACM21) || \
+    defined(EAGLE_CAMERA2_RDACM21) || defined(EAGLE_CAMERA3_RDACM21)
+#define EAGLE_CAMERA_MODEL	"imi,rdacm21"
+#define EAGLE_USE_RDACM21
+#elif defined(EAGLE_CAMERA0_RDACM20) || defined(EAGLE_CAMERA1_RDACM20) || \
+      defined(EAGLE_CAMERA2_RDACM20) || defined(EAGLE_CAMERA3_RDACM20)
+#define EAGLE_CAMERA_MODEL	"imi,rdacm20"
+#define EAGLE_USE_RDACM20
+#endif
+
+/* Define which cameras are available. */
+#if defined(EAGLE_CAMERA0_RDACM21) || defined(EAGLE_CAMERA0_RDACM20)
+#define EAGLE_USE_CAMERA_0
+#endif
+
+#if defined(EAGLE_CAMERA1_RDACM21) || defined(EAGLE_CAMERA1_RDACM20)
+#define EAGLE_USE_CAMERA_1
+#endif
+
+#if defined(EAGLE_CAMERA2_RDACM21) || defined(EAGLE_CAMERA2_RDACM20)
+#define EAGLE_USE_CAMERA_2
+#endif
+
+#if defined(EAGLE_CAMERA3_RDACM21) || defined(EAGLE_CAMERA3_RDACM20)
+#define EAGLE_USE_CAMERA_3
+#endif
+
+/* Define the endpoint links. */
+#ifdef EAGLE_USE_CAMERA_0
+&max9286_in0 {
+	remote-endpoint = <&fakra_con0>;
+};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_1
+&max9286_in1 {
+	remote-endpoint = <&fakra_con1>;
+};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_2
+&max9286_in2 {
+	remote-endpoint = <&fakra_con2>;
+};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_3
+&max9286_in3 {
+	remote-endpoint = <&fakra_con3>;
+};
+#endif
+
+/* Populate the GMSL i2c-mux bus with camera nodes. */
+#if defined(EAGLE_USE_RDACM21) || defined(EAGLE_USE_RDACM20)
+
+#ifdef EAGLE_USE_CAMERA_0
+&vin0 {
+	status = "okay";
+};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_1
+&vin1 {
+	status = "okay";
+};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_2
+&vin2 {
+	status = "okay";
+};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_3
+&vin3 {
+	status = "okay";
+};
+#endif
+
+&gmsl {
+
+	status = "okay";
+	maxim,reverse-channel-microvolt = <100000>;
+
+	i2c-mux {
+#ifdef EAGLE_USE_CAMERA_0
+		i2c@0 {
+			status = "okay";
+
+			camera@51 {
+				compatible = EAGLE_CAMERA_MODEL;
+				reg = <0x51>, <0x61>;
+
+				port {
+					fakra_con0: endpoint {
+						remote-endpoint = <&max9286_in0>;
+					};
+				};
+			};
+		};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_1
+		i2c@1 {
+			status = "okay";
+
+			camera@52 {
+				compatible = EAGLE_CAMERA_MODEL;
+				reg = <0x52>, <0x62>;
+
+				port {
+					fakra_con1: endpoint {
+						remote-endpoint = <&max9286_in1>;
+					};
+				};
+			};
+		};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_2
+		i2c@2 {
+			status = "okay";
+
+			camera@53 {
+				compatible = EAGLE_CAMERA_MODEL;
+				reg = <0x53>, <0x63>;
+
+				port {
+					fakra_con2: endpoint {
+						remote-endpoint = <&max9286_in2>;
+					};
+				};
+			};
+		};
+#endif
+
+#ifdef EAGLE_USE_CAMERA_3
+		i2c@3 {
+			status = "okay";
+
+			camera@54 {
+				compatible = EAGLE_CAMERA_MODEL;
+				reg = <0x54>, <0x64>;
+
+				port {
+					fakra_con3: endpoint {
+						remote-endpoint = <&max9286_in3>;
+					};
+				};
+			};
+		};
+#endif
+	};
+};
+#endif
-- 
2.31.1