Makefile: Reduce DDR5 tester JTAG frequency to 3MHz

This improves programming stability.

Signed-off-by: Maciej Dudek <[email protected]>

Makefile

@@ -18,6 +18,7 @@ else ifeq ($(TARGET),lpddr4_test_board)
 OFL_BOARD := antmicro_lpddr4_tester
 else ifeq ($(TARGET),ddr5_tester)
 OFL_BOARD := antmicro_ddr5_tester
+OFL_EXTRA_ARGS := --freq 3e6
 else ifeq ($(TARGET),ddr5_test_board)
 OFL_BOARD := antmicro_lpddr4_tester
 else ifeq ($(TARGET),zcu104)
@@ -32,6 +33,7 @@ endif
 ARGS ?=
 NET_ARGS := --ip-address $(IP_ADDRESS) --mac-address $(MAC_ADDRESS) --udp-port $(UDP_PORT)
 TARGET_ARGS := $(NET_ARGS) $(ARGS)
+OFL_EXTRA_ARGS ?=
 
 # Update PATH to activate the Python venv and include all required binaries
 # Adding vnev/bin to PATH forces usage of the Python binary from venv,
@@ -70,7 +72,7 @@ ifeq ($(TARGET),zcu104)
 	@echo "For ZCU104 please copy the file build/zcu104/gateware/zcu104.bit to the boot partition on microSD card"
 	@exit 1
 else
-	openFPGALoader --board $(OFL_BOARD) build/$(TARGET)/gateware/$(TOP).bit
+	openFPGALoader --board $(OFL_BOARD) $(OFL_EXTRA_ARGS) build/$(TARGET)/gateware/$(TOP).bit
 endif
 
 flash: FORCE