arm64: dts: ti: k3-am62l-main: Add RNG node

Add EIP76 Random Number Generator (RNG) node for AM62L SoC. Unlike
other k3 platforms, AM62L RNG is integrated outside crypto subsystem
at address 0x3b100000, requiring an additional entry in cbass_main
memory map.

Mark the RNG node with status "reserved" as it is intended for use by
OP-TEE for secure random number generation. If required, this hardware
can also be used through Linux kernel by enabling this node.

Signed-off-by: Shiva Tripathi <s-tripathi1@ti.com>
Link: https://patch.msgid.link/20260309101650.1652240-1-s-tripathi1@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

Author: shiva-ti

arch/arm64/boot/dts/ti/k3-am62l-main.dtsi

@@ -564,6 +564,13 @@
 		status = "disabled";
 	};
 
+	rng: rng@3b100000 {
+		compatible = "inside-secure,safexcel-eip76";
+		reg = <0x00 0x3b100000 0x00 0x7d>;
+		interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
+		status = "reserved"; /* Reserved for OP-TEE */
+	};
+
 	oc_sram: sram@70800000 {
 		compatible = "mmio-sram";
 		reg = <0x00 0x70800000 0x00 0x10000>;

arch/arm64/boot/dts/ti/k3-am62l.dtsi

@@ -79,6 +79,7 @@
 			 <0x00 0x31000000 0x00 0x31000000 0x00 0x00050000>, /* USB0 DWC3 Core Window */
 			 <0x00 0x31100000 0x00 0x31100000 0x00 0x00050000>, /* USB1 DWC3 Core Window */
 			 <0x00 0x3b000000 0x00 0x3b000000 0x00 0x00000400>, /* GPMC0 */
+			 <0x00 0x3b100000 0x00 0x3b100000 0x00 0x0000007d>, /* RNG */
 			 <0x00 0x45810000 0x00 0x45810000 0x00 0x03170000>, /* DMSS */
 			 <0x00 0x50000000 0x00 0x50000000 0x00 0x08000000>, /* GPMC DATA */
 			 <0x00 0x60000000 0x00 0x60000000 0x00 0x08000000>, /* FSS DAT1 */