openwrtv4/target/linux/brcm2708/Makefile
Christian Lamparter 707b6c815b brcm2708: add squashfs rootfs image
This patch adds a image with squashfs as the root filesystem.
A rootfs_data partition will be generated on the first boot
and placed inside the rootfs partition (just after the squashfs
image).

advantages:
 - it is possible to migrate from an existing -ext4
   installation and back via sysupgrade.
 - existing partition layout will not be lost.
 - slightly smaller image size.
 - support for attendedsysupgrade

disadvantages:
 - needs f2fs + tools as well. This is because fs-tools decides on the
   blocksize of the sdcard. So either f2fs or ext4 can get choosen as
   the rootfs_data filesystem (depends on the size of the root partition).
 - rootfs_data is placed into the rootfs partition. This makes
   it difficult for tools that expect a /dev/mmc0pX device.
   It also makes it difficult for data recovery tools since they
   might not expect to find a embedded partition or will be
   confused.

For people with existing build configurations: make sure to include mkf2fs
and f2fsck package into the image... Otherwise the new -squashfs image will
boot of a ram-overlay and won't keep the configurations after a reboot.

Cc: Álvaro Fernández Rojas <noltari@gmail.com>
Cc: Paul Spooren <spooren@informatik.uni-leipzig.de>
Cc: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
2018-05-18 09:17:49 +02:00

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Makefile

#
# Copyright (C) 2012-2016 OpenWrt.org
# Copyright (C) 2017 LEDE project
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
ARCH:=arm
BOARD:=brcm2708
BOARDNAME:=Broadcom BCM27xx
FEATURES:=ext4 audio usb usbgadget display gpio fpu squashfs
MAINTAINER:=Álvaro Fernández Rojas <noltari@gmail.com>
SUBTARGETS:=bcm2708 bcm2709 bcm2710
KERNEL_PATCHVER:=4.9
define Target/Description
Build firmware image for Broadcom BCM27xx SoC devices.
Currently produces SD Card image for Raspberry Pi.
endef
include $(INCLUDE_DIR)/target.mk
DEFAULT_PACKAGES += \
brcm2708-gpu-fw \
kmod-usb-hid \
kmod-sound-core kmod-sound-arm-bcm2835 \
kmod-fs-vfat kmod-nls-cp437 kmod-nls-iso8859-1 \
brcmfmac-firmware-43430-sdio kmod-brcmfmac wpad-mini \
partx-utils mkf2fs e2fsprogs
KERNELNAME:=Image dtbs
$(eval $(call BuildTarget))