[PATCH 6/6] [DO NOT MERGE] ARM: dts: sun8i: a83t: bananapi-m3: Enable BPI OV5640 camera

[Chen-Yu Tsai <wens@kernel.org>]

From: Chen-Yu Tsai <wens@csie.org>

Bananapi produces a camera module specifically for the Bananapi M3. This
module has an OV5640 sensor connected via the parallel CSI interface,
and an OV8865 sensor connected via MIPI CSI. I2C2 is the shared control
interface for them. The active-low reset signal is shared by the two
sensors, while each sensor has a dedicated shutdown line. The module's
onboard regulator provide power for the OV5640, while the Bananapi M3
provides power from the PMIC for the OV8865.

There's also a VM149C voice coil motor driver at I2C address 0x0c, and
an unknown device responding on I2C address 0x20. Both are related to
the OV8655 at address 0x36.

Since there is no support for the OV8865, this patch only enables the
OV5640.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts | 101 +++++++++++++++++++
 1 file changed, 101 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
index 838be7b3715f..11b27755207a 100644
--- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
@@ -85,6 +85,33 @@
 		};
 	};
 
+	reg_ov5640_avdd: ov5640-avdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-avdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		/* dldo4 enables this regulator; real supply is PS */
+		vin-supply = <&reg_dldo4>;
+	};
+
+	reg_ov5640_dovdd: ov5640-iovdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-dovdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		/* dldo4 enables this regulator; real supply is PS */
+		vin-supply = <&reg_dldo4>;
+	};
+
+	reg_ov5640_dvdd: ov5640-dvdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-dvdd";
+		regulator-min-microvolt = <1500000>;
+		regulator-max-microvolt = <1500000>;
+		/* dldo4 enables this regulator; real supply is PS */
+		vin-supply = <&reg_dldo4>;
+	};
+
 	reg_usb1_vbus: reg-usb1-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "usb1-vbus";
@@ -115,6 +142,30 @@
 	cpu-supply = <&reg_dcdc3>;
 };
 
+&ccu {
+	/* Use a stable clock source with known fixed rate for MCLK */
+	assigned-clocks = <&ccu CLK_CSI_MCLK>;
+	assigned-clock-parents = <&osc24M>;
+	assigned-clock-rates = <24000000>;
+};
+
+&csi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&csi_8bit_parallel_pins>;
+	status = "okay";
+};
+
+&csi_in {
+	csi_from_ov5640: endpoint {
+		remote-endpoint = <&ov5640_to_csi>;
+		bus-width = <8>;
+		data-shift = <2>;
+		hsync-active = <1>;     /* Active high */
+		vsync-active = <1>;     /* Active high */
+		pclk-sample = <1>;      /* Rising */
+	};
+};
+
 &de {
 	status = "okay";
 };
@@ -147,6 +198,36 @@
 	};
 };
 
+&i2c2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_pe_pins>;
+	status = "okay";
+
+	ov5640: camera@3c {
+		compatible = "ovti,ov5640";
+		reg = <0x3c>;
+		clocks = <&ccu CLK_CSI_MCLK>;
+		clock-names = "xclk";
+		AVDD-supply = <&reg_ov5640_avdd>;
+		DOVDD-supply = <&reg_ov5640_dovdd>;
+		DVDD-supply = <&reg_ov5640_dvdd>;
+		powerdown-gpios = <&pio 3 15 GPIO_ACTIVE_HIGH>; /* PD15 */
+		reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
+		rotation = <180>;
+
+		port {
+			ov5640_to_csi: endpoint {
+				remote-endpoint = <&csi_from_ov5640>;
+				bus-width = <8>;
+				data-shift = <2>;
+				hsync-active = <1>;     /* Active high */
+				vsync-active = <1>;     /* Active high */
+				pclk-sample = <1>;      /* Rising */
+			};
+		};
+	};
+};
+
 &mdio {
 	rgmii_phy: ethernet-phy@1 {
 		compatible = "ethernet-phy-ieee802.3-c22";
@@ -191,6 +272,12 @@
 	status = "okay";
 };
 
+&pio {
+	/* pinctrl hog: MCLK is shared by both camera sensors */
+	pinctrl-names = "default";
+	pinctrl-0 = <&csi_mclk_pin>;
+};
+
 &r_cir {
 	clock-frequency = <3000000>;
 	status = "okay";
@@ -327,11 +414,25 @@
 	regulator-name = "vcc-pd";
 };
 
+&reg_dldo4 {
+	/* This also powers the pull-ups on the CSI connector */
+	regulator-always-on;
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+	regulator-name = "avdd-csi";
+};
+
 &reg_drivevbus {
 	regulator-name = "usb0-vbus";
 	status = "okay";
 };
 
+&reg_eldo1 {
+	regulator-min-microvolt = <1200000>;
+	regulator-max-microvolt = <1200000>;
+	regulator-name = "dvdd-csi-r";
+};
+
 &reg_fldo1 {
 	regulator-min-microvolt = <1080000>;
 	regulator-max-microvolt = <1320000>;
-- 
2.20.1