soc: Add support for nRF54L20 SoC

Introduce nRF54L20 entries in soc directory.

Signed-off-by: Karol Lasończyk <karol.lasonczyk@nordicsemi.no>

soc/nordic/nrf54l/Kconfig

@@ -31,6 +31,17 @@ config SOC_NRF54L15_CPUAPP
 	select HAS_HW_NRF_RADIO_IEEE802154
 	select HAS_POWEROFF
 
+config SOC_NRF54L20_ENGA_CPUAPP
+	select ARM
+	select ARMV8_M_DSP
+	select CPU_CORTEX_M33
+	select CPU_HAS_ARM_MPU
+	select CPU_HAS_ICACHE
+	select CPU_HAS_ARM_SAU
+	select CPU_HAS_FPU
+	select HAS_HW_NRF_RADIO_IEEE802154
+	select HAS_POWEROFF
+
 config SOC_NRF54L15_ENGA_CPUFLPR
 	depends on RISCV_CORE_NORDIC_VPR
 

soc/nordic/nrf54l/Kconfig.defconfig.nrf54l20_enga_cpuapp

@@ -0,0 +1,11 @@
+# Nordic Semiconductor nRF54L20 MCU
+
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_NRF54L20_ENGA_CPUAPP
+
+config NUM_IRQS
+	default 274
+
+endif # SOC_NRF54L20_ENGA_CPUAPP

soc/nordic/nrf54l/Kconfig.soc

@@ -39,5 +39,24 @@ config SOC_NRF54L15_CPUFLPR
 	help
 	  NRF54L15 CPUFLPR
 
+config SOC_NRF54L20
+	bool
+	select SOC_SERIES_NRF54LX
+	help
+	  NRF54L20
+
+config SOC_NRF54L20_ENGA
+	bool
+	select SOC_NRF54L20
+	help
+	  NRF54L20 ENGA
+
+config SOC_NRF54L20_ENGA_CPUAPP
+	bool
+	select SOC_NRF54L20_ENGA
+	help
+	  NRF54L20 ENGA CPUAPP
+
 config SOC
 	default "nrf54l15" if SOC_NRF54L15
+	default "nrf54l20" if SOC_NRF54L20

soc/nordic/nrf54l/soc.c

@@ -12,6 +12,8 @@
  * for the Nordic Semiconductor nRF54L family processor.
  */
 
+#include <zephyr/devicetree.h>
+#include <zephyr/dt-bindings/regulator/nrf5x.h>
 #include <zephyr/kernel.h>
 #include <zephyr/devicetree.h>
 #include <zephyr/init.h>

soc/nordic/soc.yml

@@ -25,6 +25,9 @@ family:
             cpuclusters:
               - name: cpuapp
               - name: cpuflpr
+          - name: nrf54l20
+            cpuclusters:
+              - name: cpuapp
       - name: nrf54h
         socs:
           - name: nrf54h20
@@ -94,6 +97,8 @@ runners:
           - qualifiers:
               - nrf54l15/cpuapp
               - nrf54l15/cpuflpr
+          - qualifiers:
+              - nrf54l20/cpuapp
           - qualifiers:
               - nrf54h20/cpuapp
               - nrf54h20/cpurad
@@ -145,6 +150,8 @@ runners:
           - qualifiers:
               - nrf54l15/cpuapp
               - nrf54l15/cpuflpr
+          - qualifiers:
+              - nrf54l20/cpuapp
           - qualifiers:
               - nrf54h20/cpuapp
               - nrf54h20/cpurad