diff --git a/arch/avr32/cpu/Makefile b/arch/avr32/cpu/Makefile
index 7e648fd7f5654f8a858c7e2872fa3501da075973..5e117212574af315bb3df2b3950271c8ea5bd0ce 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 8be8c1d05e527bb8c3c1c6b4536d8eb5b2666101..06f18963e2df00ad229d467a53362748c8f45fad 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 d5245d32f63b086c65f1bb386437375d9f5d44a4..bb45cbe1538460591c80b6ff9268e9dbc50f3af1 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 955a9c558bd67660ace8bede261bfdf399eeb435..f9b93c97384138ea46908b6f1882703f358f5296 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 955a9c558bd67660ace8bede261bfdf399eeb435..90bf5bc84e6669cef8473db6cf9b1e66f8d354f1 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 4eab5a789ed06c89fc5f74b48cad85b451d07b8a..ad76631b97c029a3aa09f1925a5cd4e5dd819dea 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 0b3ebe3e6735d8f582eff3592619a9e643f9da29..f712ab9c7ae57e2f4e31db62ac0f5380344740d8 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 1930e89cf14acbf220b5e3fa1af3f53fae7b7ac0..04576358fde897f1f90786ac8d093a3eff113e4f 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 955a9c558bd67660ace8bede261bfdf399eeb435..5c30c0dbca605ddc929db5d7ef17faefeae3583a 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 3a2a8eba0174c24b081817f1804813efc1d4b828..638a9df9308a13f12e2ac763f3973a0d0b4d7010 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