[PATCH 3/4] arm64: dts: imx8mm-venice-gw73xx-0x: add dt overlay for imx219 rpi v2 camera

[Tim Harvey]

Add support for the RaspberryPi Camera v2 which is an IMX219 8MP module:
 - https://datasheets.raspberrypi.com/camera/camera-v2-schematics.pdf
 - has its own on-board 24MHz osc so no clock required from baseboard
 - pin 11 enables 1.8V and 2.8V LDO which is connected to
   GW73xx MIPI_GPIO4 (IMX8MM GPIO1_IO1) so we use this as a gpio
   controlled regulator enable.

Support is added via a device-tree overlay.

The IMX219 supports RAW8/RAW10 image formats.

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
v3: use overlay target for simplicity
v2:
 - added DTC_FLAGS
 - added line between prop and subnode for port at 0
 - added mipi_csi/port at 1 to fix compiler warning
---
 arch/arm64/boot/dts/freescale/Makefile        |  2 +
 .../imx8mm-venice-gw73xx-0x-imx219.dts        | 93 +++++++++++++++++++
 2 files changed, 95 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-imx219.dts

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 1753f787a609..a84463bea15c 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -102,6 +102,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8ulp-evk.dtb
 imx8mm-venice-gw72xx-0x-rs232-rts-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs232-rts.dtbo
 imx8mm-venice-gw72xx-0x-rs422-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs422.dtbo
 imx8mm-venice-gw72xx-0x-rs485-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs485.dtbo
+imx8mm-venice-gw73xx-0x-imx219-dtbs	:= imx8mm-venice-gw73xx-0x.dtb imx8mm-venice-gw73xx-0x-imx219.dtbo
 imx8mm-venice-gw73xx-0x-rs232-rts-dtbs	:= imx8mm-venice-gw73xx-0x.dtb imx8mm-venice-gw73xx-0x-rs232-rts.dtbo
 imx8mm-venice-gw73xx-0x-rs422-dtbs	:= imx8mm-venice-gw73xx-0x.dtb imx8mm-venice-gw73xx-0x-rs422.dtbo
 imx8mm-venice-gw73xx-0x-rs485-dtbs	:= imx8mm-venice-gw73xx-0x.dtb imx8mm-venice-gw73xx-0x-rs485.dtbo
@@ -109,6 +110,7 @@ imx8mm-venice-gw73xx-0x-rs485-dtbs	:= imx8mm-venice-gw73xx-0x.dtb imx8mm-venice-
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x-rs232-rts.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x-rs422.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x-rs485.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-imx219.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs232-rts.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs422.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs485.dtb
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-imx219.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-imx219.dts
new file mode 100644
index 000000000000..f3ece4b7fbbd
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-imx219.dts
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2022 Gateworks Corporation
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+
+#include "imx8mm-pinfunc.h"
+
+/dts-v1/;
+/plugin/;
+
+&{/} {
+	compatible = "gw,imx8mm-gw73xx-0x", "fsl,imx8mm";
+
+	reg_cam: regulator-cam {
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_reg_cam>;
+		compatible = "regulator-fixed";
+		regulator-name = "reg_cam";
+		gpio = <&gpio1 1 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
+
+	cam24m: cam24m {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+		clock-output-names = "cam24m";
+	};
+};
+
+&csi {
+	status = "okay";
+};
+
+&i2c3 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	imx219: sensor at 10 {
+		compatible = "sony,imx219";
+		reg = <0x10>;
+		clocks = <&cam24m>;
+		VDIG-supply = <&reg_cam>;
+
+		port {
+			/* MIPI CSI-2 bus endpoint */
+			imx219_to_mipi_csi2: endpoint {
+				remote-endpoint = <&imx8mm_mipi_csi_in>;
+				clock-lanes = <0>;
+				data-lanes = <1 2>;
+				link-frequencies = /bits/ 64 <456000000>;
+			};
+		};
+	};
+};
+
+&mipi_csi {
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port at 0 {
+			reg = <0>;
+
+			imx8mm_mipi_csi_in: endpoint {
+				remote-endpoint = <&imx219_to_mipi_csi2>;
+				data-lanes = <1 2>;
+			};
+		};
+
+		port at 1 {
+			reg = <1>;
+
+			imx8mm_mipi_csi_out: endpoint {
+				remote-endpoint = <&csi_in>;
+			};
+		};
+	};
+};
+
+&iomuxc {
+	pinctrl_reg_cam: regcamgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_GPIO1_IO01_GPIO1_IO1	0x41
+		>;
+	};
+};
-- 
2.17.1