Added support for Raspberry Pi 4 Model B

Makefile

@@ -20,6 +20,7 @@ boot-orange-pi-plus-2e: boot-armv7
 boot-orange-pi-pc-plus: boot-armv7
 boot-terasic-de10-standard: boot-armv7
 boot-raspberry-pi-3-b: boot-armv8
+boot-raspberry-pi-4-b: boot-armv8
 boot-amlogic-s905x: boot-armv8
 boot-aws: boot-x86_64
 boot-qemu-kvm64: boot-x86_64
@@ -248,6 +249,54 @@ rpi3b:
 	swapoff swap
 	rm -rf swap
 
+rpi4b-clfs:
+	dd if=/dev/zero of=swap bs=1048576 count=1024
+	chmod 600 swap
+	mkswap swap
+	swapon swap
+	tar xf linux-5.4.51.tar.xz
+	patch -Np1 -d linux-5.4.51 < linux-5.4.51-rpi4b.patch
+	$(MAKE) -C linux-5.4.51 bcm2711_defconfig
+	/kernelconfig/initramfs/prepare
+	bash -c 'files=`ls -1 /kernelconfig/raspberry-pi-4-b` ; for config in $$files ; do cat /kernelconfig/raspberry-pi-4-b/$$config >> linux-5.4.51/.config ; done'
+	$(MAKE) -C linux-5.4.51 oldconfig
+	$(MAKE) -C linux-5.4.51
+	$(MAKE) -C linux-5.4.51 install modules_install dtbs_install
+	cp -v linux-5.4.51/.config /boot/config-5.4.51
+	ln -svf vmlinux-5.4.51 /boot/Image
+	ln -svf dtbs/5.4.51/broadcom/bcm2711-rpi-4-b.dtb /boot/machine.dtb
+	$(MAKE) -C ../kmod tests
+	rm -rf /kernelconfig
+	rm -rf linux-5.4.51
+	swapoff swap
+	rm -rf swap
+
+rpi4b:
+	dd if=/dev/zero of=swap bs=1048576 count=1024
+	chmod 600 swap
+	mkswap swap
+	swapon swap
+	tar xf linux-5.4.51.tar.xz
+	cp -v /boot/config-5.4.51 linux-5.4.51/.config
+	/kernelconfig/initramfs/prepare
+	bash -c 'files=`ls -1 /kernelconfig/raspberry-pi-4-b` ; for config in $$files ; do cat /kernelconfig/raspberry-pi-4-b/$$config >> linux-5.4.51/.config ; done'
+	$(MAKE) -C linux-5.4.51 oldconfig
+	$(MAKE) -C linux-5.4.51
+	rm -rf /lib/modules
+	rm -rf /boot/dtbs
+	rm -f /boot/config*
+	rm -f /boot/vmlinux*
+	rm -f /boot/System.map*
+	$(MAKE) -C linux-5.4.51 install modules_install dtbs_install
+	cp -v linux-5.4.51/.config /boot/config-5.4.51
+	ln -svf vmlinux-5.4.51 /boot/Image
+	ln -svf dtbs/5.4.51/broadcom/bcm2711-rpi-4-b.dtb /boot/machine.dtb
+	rm -f /boot/*.old
+	rm -rf /kernelconfig
+	rm -rf linux-5.4.51
+	swapoff swap
+	rm -rf swap
+
 amlogics905x-clfs:
 	dd if=/dev/zero of=swap bs=1048576 count=1024
 	chmod 600 swap

build.xml

@@ -122,6 +122,10 @@ CONFIG_CROSS_COMPILE="${CLFS_TARGET}"
   <ant antfile="packages/linux/build.xml" target="boot-linux-armv8"/>
  </target>
 
+ <target name="boot-linux-raspberry-pi-4-b">
+  <ant antfile="packages/linux/build.xml" target="boot-linux-armv8"/>
+ </target>
+
  <target name="boot-linux-amlogic-s905x">
   <ant antfile="packages/linux/build.xml" target="boot-linux-armv8"/>
  </target>

linux.rpi4b-clfs.groups

+kernel
+	/boot/.*
+modules
+	/lib/modules/.*
+etc
+	/etc/.*

linux.rpi4b.groups

+kernel
+	/boot/(System\.map|config|vmlinux).*
+dtb
+	/boot/dtbs/.*
+etc
+	/etc/.*
+modules
+	/lib/modules/.*
+firmware
+	/lib/firmware/.*