boards: nucleo_n657x0_q: add DCMIPP and CSI connector support

Add an instance for DCMIPP as well as devicetree definitions to allow
plugging Raspberry Pi 22 pins or 15 pins shields via the csi_* devicetree
labels.

Signed-off-by: Josuah Demangeon <[email protected]>
Signed-off-by: Alain Volmat <[email protected]>

Author: josuah

boards/st/nucleo_n657x0_q/nucleo_n657x0_q_common.dtsi

@@ -7,6 +7,7 @@
 #include <st/n6/stm32n657X0.dtsi>
 #include <st/n6/stm32n657x0hxq-pinctrl.dtsi>
 #include <zephyr/dt-bindings/flash_controller/xspi.h>
+#include <zephyr/dt-bindings/gpio/raspberrypi-csi-connector.h>
 #include <zephyr/dt-bindings/input/input-event-codes.h>
 #include "arduino_r3_connector.dtsi"
 
@@ -54,6 +55,15 @@
 		led2 = &red_led;
 		sw0 = &user_button;
 	};
+
+	csi_connector: connector_csi {
+		compatible = "raspberrypi,csi-connector";
+		#gpio-cells = <2>;
+		gpio-map-mask = <0xffffffff 0xffffffc0>;
+		gpio-map-pass-thru = <0 0x3f>;
+		gpio-map = <CSI_IO0  0 &gpioo 5  0>,
+			   <CSI_IO1  0 &gpioa 0  0>;
+	};
 };
 
 &clk_hse {
@@ -109,6 +119,19 @@
 	status = "okay";
 };
 
+&ic17 {
+	pll-src = <1>;
+	ic-div = <4>;
+	status = "okay";
+};
+
+/* IC18 must be enabled for the 27MHz CSIPHY */
+&ic18 {
+	pll-src = <1>;
+	ic-div = <60>;
+	status = "okay";
+};
+
 &perck {
 	clocks = <&rcc STM32_SRC_HSI PER_SEL(0)>;
 	status = "okay";
@@ -154,6 +177,15 @@
 	status = "okay";
 };
 
+csi_i2c: &i2c2 {
+	clocks = <&rcc STM32_CLOCK(APB1, 22)>,
+		 <&rcc STM32_SRC_CKPER I2C2_SEL(1)>;
+	pinctrl-0 = <&i2c2_scl_pb10 &i2c2_sda_pb11>;
+	pinctrl-names = "default";
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+	status = "okay";
+};
+
 &i2c4 {
 	clocks = <&rcc STM32_CLOCK(APB4, 7)>,
 		 <&rcc STM32_SRC_CKPER I2C4_SEL(1)>;
@@ -257,3 +289,9 @@ zephyr_udc0: &usbotg_hs1 {
 		};
 	};
 };
+
+csi_interface: &dcmipp {
+	port {
+		csi_ep_in: endpoint {};
+	};
+};