boards: renesas: add board support entropy driver using TRNG

add support entropy for board: EK_RA6E2, EK_RA4E2, EK_RA2A1

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

Author: Danh Doan

boards/renesas/ek_ra2a1/doc/index.rst

@@ -84,6 +84,8 @@ hardware features:
 +-----------+------------+-------------------------------+
 | PWM       | on-chip    | pwm                           |
 +-----------+------------+-------------------------------+
+| ENTROPY   | on-chip    | entropy                       |
++-----------+------------+-------------------------------+
 
 The default configuration can be found in
 :zephyr_file:`boards/renesas/ek_ra2a1/ek_ra2a1_defconfig`

boards/renesas/ek_ra2a1/ek_ra2a1.dts

@@ -20,6 +20,7 @@
 		zephyr,flash = &flash0;
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
+		zephyr,entropy = &trng;
 	};
 
 	leds {
@@ -93,3 +94,7 @@
 	interrupt-names = "gtioca", "overflow";
 	status = "okay";
 };
+
+&trng {
+	status = "okay";
+};

boards/renesas/ek_ra4e2/doc/index.rst

@@ -104,6 +104,8 @@ The below features are currently supported on Zephyr OS for EK-RA4E2 board:
 +-----------+------------+----------------------+
 | PWM       | on-chip    | pwm                  |
 +-----------+------------+----------------------+
+| ENTROPY   | on-chip    | entropy              |
++-----------+------------+----------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/ek_ra4e2/ek_ra4e2.dts

@@ -21,6 +21,7 @@
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
 		zephyr,canbus = &canfd0;
+		zephyr,entropy = &trng;
 	};
 
 	leds {
@@ -162,3 +163,7 @@
 	divider = <RA_PWM_SOURCE_DIV_256>;
 	status = "okay";
 };
+
+&trng {
+	status = "okay";
+};

boards/renesas/ek_ra6e2/doc/index.rst

@@ -104,6 +104,8 @@ The below features are currently supported on Zephyr OS for EK-RA6E2 board:
 +-----------+------------+----------------------+
 | PWM       | on-chip    | pwm                  |
 +-----------+------------+----------------------+
+| ENTROPY   | on-chip    | entropy              |
++-----------+------------+----------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/ek_ra6e2/ek_ra6e2.dts

@@ -22,6 +22,7 @@
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
 		zephyr,canbus = &canfd0;
+		zephyr,entropy = &trng;
 	};
 
 	leds {
@@ -177,3 +178,7 @@
 	divider = <RA_PWM_SOURCE_DIV_256>;
 	status = "okay";
 };
+
+&trng {
+	status ="okay";
+};

boards/renesas/fpb_ra6e2/doc/index.rst

@@ -91,6 +91,8 @@ The below features are currently supported on Zephyr OS for FPB-RA6E2 board:
 +-----------+------------+----------------------+
 | PWM       | on-chip    | pwm                  |
 +-----------+------------+----------------------+
+| ENTROPY   | on-chip    | entropy              |
++-----------+------------+----------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/fpb_ra6e2/fpb_ra6e2.dts

@@ -21,6 +21,7 @@
 		zephyr,flash = &flash0;
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
+		zephyr,entropy = &trng;
 	};
 
 	leds {
@@ -123,3 +124,7 @@
 	divider = <RA_PWM_SOURCE_DIV_256>;
 	status = "okay";
 };
+
+&trng {
+	status ="okay";
+};

dts/arm/renesas/ra/ra2/r7fa2a1xh.dtsi

@@ -86,6 +86,11 @@
 			#pwm-cells = <3>;
 			status = "disabled";
 		};
+
+		trng: trng {
+			compatible = "renesas,ra-trng";
+			status = "disabled";
+		};
 	};
 
 	clocks: clocks {

dts/arm/renesas/ra/ra4/r7fa4e2b93cfm.dtsi

@@ -74,6 +74,11 @@
 				status = "disabled";
 			};
 		};
+
+		trng: trng {
+			compatible = "renesas,ra-trng";
+			status = "disabled";
+		};
 	};
 
 	clocks: clocks {