[nrf fromlist] soc: nordic: Add nRF54L09 FLPR

Add nrF54L09 FLPR core support.

Upstream PR #: 85310

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

Author: adamkondraciuk

soc/nordic/common/vpr/Kconfig.sysbuild

@@ -4,7 +4,7 @@
 config VPR_LAUNCHER
 	bool "VPR launcher"
 	default y
-	depends on (SOC_NRF54H20_CPUPPR || SOC_NRF54H20_CPUFLPR || SOC_NRF54L15_CPUFLPR || SOC_NRF9280_CPUPPR)
+	depends on (SOC_NRF54H20_CPUPPR || SOC_NRF54H20_CPUFLPR || SOC_NRF54L09_ENGA_CPUFLPR || SOC_NRF54L15_CPUFLPR || SOC_NRF9280_CPUPPR)
 	help
 	  Include VPR launcher in build.
 	  VPR launcher is a minimal sample built for an ARM core that starts given VPR core.

soc/nordic/nrf54l/Kconfig

@@ -37,6 +37,9 @@ config SOC_NRF54L15_CPUAPP
 config SOC_NRF54L05_CPUFLPR
 	select RISCV_CORE_NORDIC_VPR
 
+config SOC_NRF54L09_ENGA_CPUFLPR
+	select RISCV_CORE_NORDIC_VPR
+
 config SOC_NRF54L10_CPUFLPR
 	select RISCV_CORE_NORDIC_VPR
 

soc/nordic/nrf54l/Kconfig.defconfig.nrf54l09_enga_cpuflpr

@@ -0,0 +1,11 @@
+# Nordic Semiconductor nRF54L09 MCU
+
+# Copyright (c) 2025 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_NRF54L09_ENGA_CPUFLPR
+
+config NUM_IRQS
+	default 287
+
+endif # SOC_NRF54L09_ENGA_CPUFLPR

soc/nordic/nrf54l/Kconfig.soc

@@ -39,6 +39,13 @@ config SOC_NRF54L09_ENGA_CPUAPP
 	help
 	  NRF54L09 ENGA CPUAPP
 
+config SOC_NRF54L09_ENGA_CPUFLPR
+	bool
+	select SOC_NRF54L09_ENGA
+	help
+	  NRF54L09 ENGA CPUFLPR
+
+
 config SOC_NRF54L10
 	bool
 	select SOC_SERIES_NRF54LX

soc/nordic/soc.yml

@@ -28,6 +28,7 @@ family:
           - name: nrf54l09
             cpuclusters:
               - name: cpuapp
+              - name: cpuflpr
           - name: nrf54l10
             cpuclusters:
               - name: cpuapp
@@ -110,6 +111,7 @@ runners:
               - nrf54l05/cpuflpr
           - qualifiers:
               - nrf54l09/cpuapp
+              - nrf54l09/cpuflpr
           - qualifiers:
               - nrf54l10/cpuapp
               - nrf54l10/cpuflpr