[nrf fromlist] dts: nordic: nrf54: Add nRF54L09 FLPR

Add nrF54L09 FLPR core support.

Upstream PR #: 85310

Signed-off-by: Adam Kondraciuk <[email protected]>

Author: adamkondraciuk

dts/common/nordic/nrf54l09.dtsi

@@ -86,19 +86,19 @@
 		};
 
 		cpuapp_sram: memory@20000000 {
-			reg = <0x20000000 DT_SIZE_K(144)>;
-			ranges = <0x0 0x20000000 DT_SIZE_K(144)>;
+			reg = <0x20000000 DT_SIZE_K(143)>;
+			ranges = <0x0 0x20000000 DT_SIZE_K(143)>;
 			compatible = "mmio-sram";
 			#address-cells = <1>;
 			#size-cells = <1>;
 		};
 
-		cpuflpr_sram: memory@20024000 {
+		cpuflpr_sram: memory@20023c00 {
 			compatible = "mmio-sram";
-			reg = <0x20024000 DT_SIZE_K(48)>;
+			reg = <0x20023c00 DT_SIZE_K(48)>;
 			#address-cells = <1>;
 			#size-cells = <1>;
-			ranges = <0x0 0x20024000 DT_SIZE_K(48)>;
+			ranges = <0x0 0x20023c00 DT_SIZE_K(48)>;
 		};
 
  #ifdef USE_NON_SECURE_ADDRESS_MAP

dts/riscv/nordic/nrf54l09_enga_cpuflpr.dtsi

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <nordic/nrf54l09.dtsi>
+
+cpu: &cpuflpr {};
+clic: &cpuflpr_clic {};
+
+/delete-node/ &cpuapp;
+/delete-node/ &cpuapp_rram;
+/delete-node/ &cpuapp_ppb;
+/delete-node/ &cpuapp_sram;
+
+/ {
+	soc {
+		compatible = "simple-bus";
+		interrupt-parent = <&cpuflpr_clic>;
+		ranges;
+	};
+};
+
+&cpuflpr {
+	cpuflpr_vevif_rx: mailbox {
+		compatible = "nordic,nrf-vevif-task-rx";
+		status = "disabled";
+		interrupt-parent = <&cpuflpr_clic>;
+		interrupts = <16 NRF_DEFAULT_IRQ_PRIORITY>,
+			     <17 NRF_DEFAULT_IRQ_PRIORITY>,
+			     <18 NRF_DEFAULT_IRQ_PRIORITY>,
+			     <19 NRF_DEFAULT_IRQ_PRIORITY>,
+			     <20 NRF_DEFAULT_IRQ_PRIORITY>,
+			     <21 NRF_DEFAULT_IRQ_PRIORITY>,
+			     <22 NRF_DEFAULT_IRQ_PRIORITY>;
+		#mbox-cells = <1>;
+		nordic,tasks = <7>;
+		nordic,tasks-mask = <0x007f0000>;
+	};
+};
+
+&cpuflpr_vpr {
+	cpuflpr_vevif_tx: mailbox {
+		compatible = "nordic,nrf-vevif-event-tx";
+		#mbox-cells = <1>;
+		nordic,events = <1>;
+		nordic,events-mask = <0x00100000>;
+		status = "disabled";
+	};
+};
+
+&cpuflpr_clic {
+	status = "okay";
+};
+
+&grtc {
+	interrupts = <226 NRF_DEFAULT_IRQ_PRIORITY>;
+};
+
+&gpiote20 {
+	interrupts = <218 NRF_DEFAULT_IRQ_PRIORITY>;
+};
+
+&gpiote30 {
+	interrupts = <268 NRF_DEFAULT_IRQ_PRIORITY>;
+};