diff --git a/arch/avr32/cpu/Makefile b/arch/avr32/cpu/Makefile
index 7e648fd..5e11721 100644
--- a/arch/avr32/cpu/Makefile
+++ b/arch/avr32/cpu/Makefile
@@ -7,34 +7,12 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)lib$(CPU).o
-
-START-y			+= start.o
-
-COBJS-y			+= cpu.o
-COBJS-$(CONFIG_SYS_HSDRAMC) += hsdramc.o
-COBJS-y			+= exception.o
-COBJS-y			+= cache.o
-COBJS-y			+= interrupts.o
-COBJS-$(CONFIG_PORTMUX_PIO) += portmux-pio.o
-COBJS-$(CONFIG_PORTMUX_GPIO) += portmux-gpio.o
-
-SRCS	:= $(START-y:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
-START	:= $(addprefix $(obj),$(START-y))
-
-all: $(obj).depend $(START) $(LIB)
-
-$(LIB): $(OBJS)
-	$(call cmd_link_o_target, $^)
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+extra-y			+= start.o
+
+obj-y			+= cpu.o
+obj-$(CONFIG_SYS_HSDRAMC) += hsdramc.o
+obj-y			+= exception.o
+obj-y			+= cache.o
+obj-y			+= interrupts.o
+obj-$(CONFIG_PORTMUX_PIO) += portmux-pio.o
+obj-$(CONFIG_PORTMUX_GPIO) += portmux-gpio.o
diff --git a/arch/avr32/cpu/at32ap700x/Makefile b/arch/avr32/cpu/at32ap700x/Makefile
index 8be8c1d..06f1896 100644
--- a/arch/avr32/cpu/at32ap700x/Makefile
+++ b/arch/avr32/cpu/at32ap700x/Makefile
@@ -4,24 +4,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)lib$(SOC).o
-
-COBJS	:= portmux.o clk.o mmu.o
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
-
-all: $(obj).depend $(LIB)
-
-$(LIB): $(OBJS)
-	$(call cmd_link_o_target, $^)
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= portmux.o clk.o mmu.o
diff --git a/arch/avr32/lib/Makefile b/arch/avr32/lib/Makefile
index d5245d3..bb45cbe 100644
--- a/arch/avr32/lib/Makefile
+++ b/arch/avr32/lib/Makefile
@@ -7,27 +7,7 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(ARCH).o
-
-SOBJS-y	+= memset.o
-
-COBJS-y	+= board.o
-COBJS-$(CONFIG_CMD_BOOTM) += bootm.o
-COBJS-y	+= interrupts.o
-
-SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
-
-$(LIB):	$(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	+= memset.o
+obj-y	+= board.o
+obj-$(CONFIG_CMD_BOOTM) += bootm.o
+obj-y	+= interrupts.o
diff --git a/board/atmel/atngw100/Makefile b/board/atmel/atngw100/Makefile
index 955a9c5..f9b93c9 100644
--- a/board/atmel/atngw100/Makefile
+++ b/board/atmel/atngw100/Makefile
@@ -3,23 +3,4 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)lib$(BOARD).o
-
-COBJS	:= $(BOARD).o
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= atngw100.o
diff --git a/board/atmel/atngw100mkii/Makefile b/board/atmel/atngw100mkii/Makefile
index 955a9c5..90bf5bc 100644
--- a/board/atmel/atngw100mkii/Makefile
+++ b/board/atmel/atngw100mkii/Makefile
@@ -3,23 +3,4 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)lib$(BOARD).o
-
-COBJS	:= $(BOARD).o
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= atngw100mkii.o
diff --git a/board/atmel/atstk1000/Makefile b/board/atmel/atstk1000/Makefile
index 4eab5a7..ad76631 100644
--- a/board/atmel/atstk1000/Makefile
+++ b/board/atmel/atstk1000/Makefile
@@ -6,23 +6,4 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 
-include $(TOPDIR)/config.mk
-
-LIB			:= $(obj)lib$(BOARD).o
-
-COBJS-y			+= $(BOARD).o
-
-SRCS			:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS			:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y			+= atstk1000.o
diff --git a/board/earthlcd/favr-32-ezkit/Makefile b/board/earthlcd/favr-32-ezkit/Makefile
index 0b3ebe3..f712ab9 100644
--- a/board/earthlcd/favr-32-ezkit/Makefile
+++ b/board/earthlcd/favr-32-ezkit/Makefile
@@ -6,23 +6,4 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)lib$(BOARD).o
-
-COBJS	:= $(BOARD).o flash.o
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= favr-32-ezkit.o flash.o
diff --git a/board/in-circuit/grasshopper/Makefile b/board/in-circuit/grasshopper/Makefile
index 1930e89..0457635 100644
--- a/board/in-circuit/grasshopper/Makefile
+++ b/board/in-circuit/grasshopper/Makefile
@@ -7,23 +7,4 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 
-include $(TOPDIR)/config.mk
-
-LIB     := $(obj)lib$(BOARD).o
-
-COBJS-y += $(BOARD).o
-
-SRCS    := $(COBJS-y:.o=.c)
-OBJS    := $(addprefix $(obj),$(COBJS-y))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y += grasshopper.o
diff --git a/board/mimc/mimc200/Makefile b/board/mimc/mimc200/Makefile
index 955a9c5..5c30c0d 100644
--- a/board/mimc/mimc200/Makefile
+++ b/board/mimc/mimc200/Makefile
@@ -3,23 +3,4 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)lib$(BOARD).o
-
-COBJS	:= $(BOARD).o
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= mimc200.o
diff --git a/board/miromico/hammerhead/Makefile b/board/miromico/hammerhead/Makefile
index 3a2a8eb..638a9df 100644
--- a/board/miromico/hammerhead/Makefile
+++ b/board/miromico/hammerhead/Makefile
@@ -3,23 +3,4 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)lib$(BOARD).o
-
-COBJS	:= $(BOARD).o
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= hammerhead.o
