diff --git a/arch/arm/cpu/arm720t/Makefile b/arch/arm/cpu/arm720t/Makefile
index 73e1635..243a123 100644
--- a/arch/arm/cpu/arm720t/Makefile
+++ b/arch/arm/cpu/arm720t/Makefile
@@ -5,27 +5,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(CPU).o
-
-START	= start.o
-COBJS	= interrupts.o cpu.o
-
-SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
-START	:= $(addprefix $(obj),$(START))
-
-all:	$(obj).depend $(START) $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+extra-y	= start.o
+obj-y	= interrupts.o cpu.o
diff --git a/arch/arm/cpu/arm720t/tegra-common/Makefile b/arch/arm/cpu/arm720t/tegra-common/Makefile
index 37ec43f..a9c2b67 100644
--- a/arch/arm/cpu/arm720t/tegra-common/Makefile
+++ b/arch/arm/cpu/arm720t/tegra-common/Makefile
@@ -7,26 +7,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)libtegra-common.o
-
-COBJS-$(CONFIG_SPL_BUILD) += spl.o
-COBJS-y	+= cpu.o
-
-SRCS	:= $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y))
-
-all:	$(obj).depend $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-$(CONFIG_SPL_BUILD) += spl.o
+obj-y	+= cpu.o
diff --git a/arch/arm/cpu/arm720t/tegra114/Makefile b/arch/arm/cpu/arm720t/tegra114/Makefile
index 6cf7fe9..ea3e55e 100644
--- a/arch/arm/cpu/arm720t/tegra114/Makefile
+++ b/arch/arm/cpu/arm720t/tegra114/Makefile
@@ -17,26 +17,5 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(SOC).o
-
-#COBJS-y	+= cpu.o t11x.o
-COBJS-y	+= cpu.o
-
-SRCS	:= $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y))
-
-all:	$(obj).depend $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+#obj-y	+= cpu.o t11x.o
+obj-y	+= cpu.o
diff --git a/arch/arm/cpu/arm720t/tegra20/Makefile b/arch/arm/cpu/arm720t/tegra20/Makefile
index eef5922d..12243fa 100644
--- a/arch/arm/cpu/arm720t/tegra20/Makefile
+++ b/arch/arm/cpu/arm720t/tegra20/Makefile
@@ -7,25 +7,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(SOC).o
-
-COBJS-y	+= cpu.o
-
-SRCS	:= $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y))
-
-all:	$(obj).depend $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	+= cpu.o
diff --git a/arch/arm/cpu/arm720t/tegra30/Makefile b/arch/arm/cpu/arm720t/tegra30/Makefile
index bd96997..6ff4c55 100644
--- a/arch/arm/cpu/arm720t/tegra30/Makefile
+++ b/arch/arm/cpu/arm720t/tegra30/Makefile
@@ -17,25 +17,4 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(SOC).o
-
-COBJS-y	+= cpu.o
-
-SRCS	:= $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y))
-
-all:	$(obj).depend $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	+= cpu.o