arm64: dts: airoha: en7581: Add more nodes to EN7581 SoC evaluation board

Introduce the following nodes to EN7581 SoC and EN7581 evaluation board:
- rng controller
- pinctrl
- i2c controllers

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250221-en7581-dts-spi-pinctrl-v3-1-4719e2d01555@kernel.org
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

2 files changed, 64 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/airoha/en7581-evb.dts b/arch/arm64/boot/dts/airoha/en7581-evb.dts
index a4cdcadd1ae5..d53b72d18242 100644
--- a/arch/arm64/boot/dts/airoha/en7581-evb.dts
+++ b/arch/arm64/boot/dts/airoha/en7581-evb.dts
@@ -64,3 +64,7 @@
 		};
 	};
 };
+
+&i2c0 {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/airoha/en7581.dtsi b/arch/arm64/boot/dts/airoha/en7581.dtsi
index dbd296b049f9..9a419796594d 100644
--- a/arch/arm64/boot/dts/airoha/en7581.dtsi
+++ b/arch/arm64/boot/dts/airoha/en7581.dtsi
@@ -3,6 +3,7 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/clock/en7523-clk.h>
+#include <dt-bindings/reset/airoha,en7581-reset.h>
 
 / {
 	interrupt-parent = <&gic>;
@@ -123,6 +124,12 @@
 			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
 	};
 
+	clk20m: clock-20000000 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <20000000>;
+	};
+
 	soc {
 		compatible = "simple-bus";
 		#address-cells = <2>;
@@ -181,5 +188,58 @@
 			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
 			clock-frequency = <1843200>;
 		};
+
+		rng@1faa1000 {
+			compatible = "airoha,en7581-trng";
+			reg = <0x0 0x1faa1000 0x0 0xc04>;
+			interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		system-controller@1fbf0200 {
+			compatible = "airoha,en7581-gpio-sysctl", "syscon",
+				     "simple-mfd";
+			reg = <0x0 0x1fbf0200 0x0 0xc0>;
+
+			en7581_pinctrl: pinctrl {
+				compatible = "airoha,en7581-pinctrl";
+
+				interrupt-parent = <&gic>;
+				interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+
+				gpio-controller;
+				#gpio-cells = <2>;
+
+				interrupt-controller;
+				#interrupt-cells = <2>;
+			};
+		};
+
+		i2c0: i2c@1fbf8000 {
+			compatible = "mediatek,mt7621-i2c";
+			reg = <0x0 0x1fbf8000 0x0 0x100>;
+
+			resets = <&scuclk EN7581_I2C2_RST>;
+
+			clocks = <&clk20m>;
+			clock-frequency = <100000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			status = "disabled";
+		};
+
+		i2c1: i2c@1fbf8100 {
+			compatible = "mediatek,mt7621-i2c";
+			reg = <0x0 0x1fbf8100 0x0 0x100>;
+
+			resets = <&scuclk EN7581_I2C_MASTER_RST>;
+
+			clocks = <&clk20m>;
+			clock-frequency = <100000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			status = "disabled";
+		};
 	};
 };