dts: bflb: Add I2C nodes

Adds i2c binding and nodes

Signed-off-by: Camille BAUD <mail@massdriver.space>

Author: VynDragon

dts/bindings/i2c/bflb,i2c.yaml

@@ -0,0 +1,21 @@
+# Copyright (c) 2024-2025 MASSDRIVER EI (massdriver.space)
+# SPDX-License-Identifier: Apache-2.0
+
+description: Bouffalolab I2C interface
+
+compatible: "bflb,i2c"
+
+include: [i2c-controller.yaml, pinctrl-device.yaml]
+
+properties:
+  reg:
+    required: true
+
+  interrupts:
+    required: true
+
+  pinctrl-0:
+    required: true
+
+  pinctrl-names:
+    required: true

dts/riscv/bflb/bl60x.dtsi

@@ -10,6 +10,7 @@
 #include <dt-bindings/pinctrl/bflb-common-pinctrl.h>
 #include <dt-bindings/pinctrl/bl60x-pinctrl.h>
 #include <dt-bindings/clock/bflb_bl60x_clock.h>
+#include <zephyr/dt-bindings/i2c/i2c.h>
 
 / {
 	#address-cells = <1>;
@@ -176,6 +177,17 @@
 			interrupt-parent = <&clic>;
 		};
 
+		i2c0: i2c@4000a300 {
+			compatible = "bflb,i2c";
+			reg = <0x4000a300 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			interrupts = <48 0>;
+			interrupt-parent = <&clic>;
+		};
+
 		flashctrl: flash-controller@4000b000 {
 			compatible = "bflb,flash-controller";
 			reg = <0x4000b000 0x1000>;

dts/riscv/bflb/bl61x.dtsi

@@ -11,6 +11,7 @@
 #include <dt-bindings/clock/bflb_bl61x_clock.h>
 #include <zephyr/dt-bindings/gpio/gpio.h>
 #include <zephyr/dt-bindings/input/input-event-codes.h>
+#include <zephyr/dt-bindings/i2c/i2c.h>
 
 / {
 	#address-cells = <1>;
@@ -169,6 +170,28 @@
 			status = "disabled";
 		};
 
+		i2c0: i2c@2000a300 {
+			compatible = "bflb,i2c";
+			reg = <0x2000a300 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			interrupts = <48 1>;
+			interrupt-parent = <&clic>;
+		};
+
+		i2c1: i2c@2000a900 {
+			compatible = "bflb,i2c";
+			reg = <0x2000a900 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			interrupts = <55 1>;
+			interrupt-parent = <&clic>;
+		};
+
 		flashctrl: flash-controller@2000b000 {
 			compatible = "bflb,flash-controller";
 			reg = <0x2000b000 0x1000>;

dts/riscv/bflb/bl70x.dtsi

@@ -9,6 +9,7 @@
 #include <dt-bindings/pinctrl/bflb-common-pinctrl.h>
 #include <dt-bindings/pinctrl/bl70x-pinctrl.h>
 #include <dt-bindings/clock/bflb_bl70x_clock.h>
+#include <zephyr/dt-bindings/i2c/i2c.h>
 
 / {
 	#address-cells = <1>;
@@ -170,6 +171,17 @@
 			status = "disabled";
 		};
 
+		i2c0: i2c@4000a300 {
+			compatible = "bflb,i2c";
+			reg = <0x4000a300 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			interrupts = <48 0>;
+			interrupt-parent = <&clic>;
+		};
+
 		flashctrl: flash-controller@4000b000 {
 			compatible = "bflb,flash-controller";
 			reg = <0x4000b000 0x1000>;