samples: boot: mcuboot_recovery_entry: low size DFU configuration

Added sample configuration for decrease NVM sizes of the firmware loader
and the MCUboot.
Configuration name: sample.boot.mcuboot_recovery_entry.size_optimized
Configuration can be enabled with FILE_SUFFIX=size_opt when building.

Signed-off-by: Andrzej Puzdrowski <[email protected]>

Author: nvlsianpu

samples/boot/mcuboot_recovery_entry/sample.yaml

@@ -15,3 +15,18 @@ tests:
       - bm_nrf54l15dk/nrf54l15/cpuapp/s115_softdevice/mcuboot
     tags:
       - sysbuild
+  sample.boot.mcuboot_recovery_entry.size_optimized:
+    sysbuild: true
+    build_only: true
+    integration_platforms:
+      - bm_nrf54l15dk/nrf54l05/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l10/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l15/cpuapp/s115_softdevice/mcuboot
+    platform_allow:
+      - bm_nrf54l15dk/nrf54l05/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l10/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l15/cpuapp/s115_softdevice/mcuboot
+    tags:
+      - sysbuild
+    extra_args:
+      - FILE_SUFFIX=size_opt

samples/boot/mcuboot_recovery_entry/sysbuild/firmware_loader_size_opt.conf

@@ -0,0 +1,10 @@
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y
+CONFIG_LOG=n
+CONFIG_CONSOLE=n
+CONFIG_BM_UARTE_CONSOLE=n
+CONFIG_CRACEN_LIB_KMU=n
+CONFIG_PSA_WANT_ALG_CTR_DRBG=n
+CONFIG_PSA_USE_CRACEN_MAC_DRIVER=n
+CONFIG_PSA_USE_CRACEN_AEAD_DRIVER=n
+CONFIG_PSA_USE_CRACEN_CIPHER_DRIVER=n

samples/boot/mcuboot_recovery_entry/sysbuild/mcuboot/app.overlay

@@ -0,0 +1,5 @@
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
+};

samples/boot/mcuboot_recovery_entry/sysbuild/mcuboot/prj.conf

@@ -0,0 +1,32 @@
+CONFIG_PM=n
+
+CONFIG_MAIN_STACK_SIZE=10240
+
+CONFIG_BOOT_SWAP_SAVE_ENCTLV=n
+CONFIG_BOOT_ENCRYPT_IMAGE=n
+
+CONFIG_BOOT_UPGRADE_ONLY=n
+CONFIG_BOOT_BOOTSTRAP=n
+
+### mbedTLS has its own heap
+# CONFIG_HEAP_MEM_POOL_SIZE is not set
+
+CONFIG_FLASH=y
+
+### Various Zephyr boards enable features that we don't want.
+# CONFIG_BT is not set
+# CONFIG_I2C is not set
+
+### Decrease footprint by ~4 KB in comparison to CBPRINTF_COMPLETE=y
+CONFIG_CBPRINTF_NANO=y
+### Use picolibc to reduce flash usage
+CONFIG_PICOLIBC=y
+### Disable malloc arena because we don't need it
+CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=0
+
+# NCS boot banner
+CONFIG_NCS_APPLICATION_BOOT_BANNER_STRING="MCUboot"
+
+#CONFIG_LOG=n
+#CONFIG_CONSOLE=n
+#CONFIG_BM_UARTE_CONSOLE=n

samples/boot/mcuboot_recovery_entry/sysbuild/mcuboot/prj_size_opt.conf

@@ -0,0 +1,32 @@
+CONFIG_PM=n
+
+CONFIG_MAIN_STACK_SIZE=10240
+
+CONFIG_BOOT_SWAP_SAVE_ENCTLV=n
+CONFIG_BOOT_ENCRYPT_IMAGE=n
+
+CONFIG_BOOT_UPGRADE_ONLY=n
+CONFIG_BOOT_BOOTSTRAP=n
+
+### mbedTLS has its own heap
+# CONFIG_HEAP_MEM_POOL_SIZE is not set
+
+CONFIG_FLASH=y
+
+### Various Zephyr boards enable features that we don't want.
+# CONFIG_BT is not set
+# CONFIG_I2C is not set
+
+### Decrease footprint by ~4 KB in comparison to CBPRINTF_COMPLETE=y
+CONFIG_CBPRINTF_NANO=y
+### Use picolibc to reduce flash usage
+CONFIG_PICOLIBC=y
+### Disable malloc arena because we don't need it
+CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=0
+
+# NCS boot banner
+CONFIG_NCS_APPLICATION_BOOT_BANNER_STRING="MCUboot"
+
+CONFIG_LOG=n
+CONFIG_CONSOLE=n
+CONFIG_BM_UARTE_CONSOLE=n