[PATCH v6 7/7] ARM: dts: sun8i-a83t: Add BananaPi M3 OV8865 camera overlay

[Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>]

Add an overlay supporting the OV8865 from the BananaPi Camera v3
peripheral board. The board has two sensors (OV5640 and OV8865)
which cannot be supported in parallel as they share the same reset
pin and the kernel currently has no support for this case.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
---
 arch/arm/boot/dts/Makefile                    |   1 +
 .../sun8i-a83t-bananapi-m3-camera-ov8865.dts  | 109 ++++++++++++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 arch/arm/boot/dts/sun8i-a83t-bananapi-m3-camera-ov8865.dts

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 1f1173efeb14..cf0ab67b430b 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -1340,6 +1340,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-a83t-allwinner-h8homlet-v2.dtb \
 	sun8i-a83t-bananapi-m3.dtb \
 	sun8i-a83t-bananapi-m3-camera-ov5640.dtbo \
+	sun8i-a83t-bananapi-m3-camera-ov8865.dtbo \
 	sun8i-a83t-cubietruck-plus.dtb \
 	sun8i-a83t-tbs-a711.dtb \
 	sun8i-h2-plus-bananapi-m2-zero.dtb \
diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3-camera-ov8865.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3-camera-ov8865.dts
new file mode 100644
index 000000000000..0656ee8d4bfe
--- /dev/null
+++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3-camera-ov8865.dts
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0 OR X11
+/*
+ * Copyright 2022 Bootlin
+ * Author: Kévin L'hôpital <kevin.lhopital@xxxxxxxxxxx>
+ * Author: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/sun8i-a83t-ccu.h>
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	/*
+	 * These regulators actually have DLDO4 tied to their EN pin, which is
+	 * described as input supply here for lack of a better representation.
+	 * Their actual supply is PS, which is always-on.
+	 */
+
+	ov8865_avdd: ov8865-avdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov8865-avdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov8865_dovdd: ov8865-dovdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov8865-dovdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov8865_dvdd: ov8865-dvdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov8865-dvdd";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		vin-supply = <&reg_dldo4>;
+	};
+};
+
+&ccu {
+	assigned-clocks = <&ccu CLK_CSI_MCLK>;
+	assigned-clock-parents = <&osc24M>;
+	assigned-clock-rates = <24000000>;
+};
+
+&csi {
+	status = "okay";
+};
+
+&i2c2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_pe_pins>;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	ov8865: camera@36 {
+		compatible = "ovti,ov8865";
+		reg = <0x36>;
+
+		clocks = <&ccu CLK_CSI_MCLK>;
+		assigned-clocks = <&ccu CLK_CSI_MCLK>;
+		assigned-clock-parents = <&osc24M>;
+		assigned-clock-rates = <24000000>;
+
+		avdd-supply = <&ov8865_avdd>;
+		dovdd-supply = <&ov8865_dovdd>;
+		dvdd-supply = <&ov8865_dvdd>;
+
+		powerdown-gpios = <&pio 4 17 GPIO_ACTIVE_LOW>; /* PE17 */
+		reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
+
+		port {
+			ov8865_out_mipi_csi2: endpoint {
+				remote-endpoint = <&mipi_csi2_in_ov8865>;
+				link-frequencies = /bits/ 64 <360000000>;
+				data-lanes = <1 2 3 4>;
+			};
+		};
+	};
+};
+
+&mipi_csi2 {
+	status = "okay";
+};
+
+&mipi_csi2_in {
+	mipi_csi2_in_ov8865: endpoint {
+		remote-endpoint = <&ov8865_out_mipi_csi2>;
+		data-lanes = <1 2 3 4>;
+	};
+};
+
+&pio {
+	pinctrl-names = "default";
+	pinctrl-0 = <&csi_mclk_pin>;
+};
+
+&reg_dldo4 {
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+};
-- 
2.37.3