ARM: dts: exynos: Add front camera support to I9100

Add node for Samsung S5K5BAF CMOS image sensor and enable the associated
MIPI CSI-2 receiver node.
Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
Link: https://lore.kernel.org/r/20210327200851.777327-1-timon.baetz@protonmail.com
[krzk: put csis_1 node in alphabetical order]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

arch/arm/boot/dts/exynos4210-i9100.dts

@@ -147,6 +147,36 @@ battery@36 {
 		};
 	};
 
+	i2c_s5k5baf: i2c-gpio-1 {
+		compatible = "i2c-gpio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		sda-gpios = <&gpc1 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpc1 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		i2c-gpio,delay-us = <2>;
+
+		image-sensor@2d {
+			compatible = "samsung,s5k5baf";
+			reg = <0x2d>;
+			vdda-supply = <&cam_io_en_reg>;
+			vddreg-supply = <&vt_core_15v_reg>;
+			vddio-supply = <&vtcam_reg>;
+			clocks = <&camera 0>;
+			clock-names = "mclk";
+			stbyn-gpios = <&gpl2 0 GPIO_ACTIVE_LOW>;
+			rstn-gpios = <&gpl2 1 GPIO_ACTIVE_LOW>;
+			clock-frequency = <24000000>;
+
+			port {
+				s5k5bafx_ep: endpoint {
+					remote-endpoint = <&csis1_ep>;
+					data-lanes = <1>;
+				};
+			};
+		};
+	};
+
 	spi-3 {
 		compatible = "spi-gpio";
 		#address-cells = <1>;
@@ -220,7 +250,29 @@ pmic_ap_clk: pmic-ap-clk {
 };
 
 &camera {
+	pinctrl-0 = <&cam_port_a_clk_active>;
+	pinctrl-names = "default";
+	status = "okay";
+	assigned-clocks = <&clock CLK_MOUT_CAM0>, <&clock CLK_MOUT_CAM1>;
+	assigned-clock-parents = <&clock CLK_XUSBXTI>, <&clock CLK_XUSBXTI>;
+};
+
+&csis_1 {
 	status = "okay";
+	vddcore-supply = <&vusb_reg>;
+	vddio-supply = <&vmipi_reg>;
+	clock-frequency = <160000000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@4 {
+		reg = <4>;
+		csis1_ep: endpoint {
+			remote-endpoint = <&s5k5bafx_ep>;
+			data-lanes = <1>;
+			samsung,csis-hs-settle = <6>;
+		};
+	};
 };
 
 &cpu0 {