Zephyr fixes

ports/zephyr-cp/Makefile

@@ -21,7 +21,7 @@ ifeq ($(DEBUG),1)
 WEST_CMAKE_ARGS += -Dzephyr-cp_EXTRA_CONF_FILE=$(DEBUG_CONF_FILE)
 endif
 
-.PHONY: $(BUILD)/zephyr-cp/zephyr/zephyr.elf flash recover debug debug-jlink debugserver attach run run-sim clean menuconfig all clean-all test fetch-port-submodules
+.PHONY: $(BUILD)/zephyr-cp/zephyr/zephyr.elf flash recover debug debug-jlink debugserver attach run run-sim clean menuconfig all clean-all sim clean-sim test fetch-port-submodules
 
 $(BUILD)/zephyr-cp/zephyr/zephyr.elf:
 	python cptools/pre_zephyr_build_prep.py $(BOARD)
@@ -87,6 +87,13 @@ all:
 clean-all:
 	rm -rf build build-*
 
+# Build all sim boards concurrently using the same jobserver as `make all`.
+sim:
+	+python cptools/build_all_boards.py --vendor native --continue-on-error
+
+clean-sim:
+	rm -rf $(wildcard build-native_*)
+
 test: build-native_native_sim/zephyr-cp/zephyr/zephyr.exe
 	pytest cptools/tests
 	pytest tests/ -v

ports/zephyr-cp/boards/adafruit_feather_nrf52840_uf2.conf

@@ -5,4 +5,6 @@ CONFIG_BT_BROADCASTER=y
 CONFIG_BT_OBSERVER=y
 CONFIG_BT_EXT_ADV=y
 
+CONFIG_USE_DT_CODE_PARTITION=y
+
 CONFIG_BOARD_SERIAL_BACKEND_CDC_ACM=n

ports/zephyr-cp/cptools/build_all_boards.py

@@ -426,6 +426,12 @@ def main():
         action="store_true",
         help="Continue building remaining boards even if one fails",
     )
+    parser.add_argument(
+        "--vendor",
+        type=str,
+        default=None,
+        help="Only build boards from this vendor (e.g. 'native' for sim boards)",
+    )
 
     args = parser.parse_args()
 
@@ -439,6 +445,9 @@ def main():
     # Discover all boards
     boards = discover_boards(port_dir)
 
+    if args.vendor:
+        boards = [(v, b) for v, b in boards if v == args.vendor]
+
     if not boards:
         print("ERROR: No boards found!")
         return 1