boards: renesas: add board support entropy driver using SCE5

add support SCE5 for board: ek_ra4w1

Signed-off-by: Danh Doan <[email protected]>

Author: Danh Doan

boards/renesas/ek_ra4w1/doc/index.rst

@@ -94,6 +94,8 @@ The below features are currently supported on Zephyr OS for EK-RA4W1 board:
 +-----------+------------+----------------------+
 | COUNTER   | on-chip    | counter              |
 +-----------+------------+----------------------+
+| ENTROPY   | on-chip    | entropy              |
++-----------+------------+----------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/ek_ra4w1/ek_ra4w1.dts

@@ -18,6 +18,7 @@
 		zephyr,flash = &flash0;
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
+		zephyr,entropy = &trng;
 	};
 
 	leds {
@@ -65,3 +66,7 @@
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&trng {
+	status = "okay";
+};

dts/arm/renesas/ra/ra4/r7fa4w1ad2cng.dtsi

@@ -40,6 +40,11 @@
 			interrupts = <28 1>, <29 1>, <30 1>, <31 1>;
 			interrupt-names = "rxi", "txi", "tei", "eri";
 		};
+
+		trng: trng {
+			compatible = "renesas,ra-sce5-rng";
+			status = "disabled";
+		};
 	};
 
 	clocks: clocks {