Bump buildroot to 2020.11-rc1 (#985)

* Update buildroot-patches for 2020.11-rc1 buildroot

* Update buildroot to 2020.11-rc1

Signed-off-by: Stefan Agner <stefan@agner.ch>

* Don't rely on sfdisk --list-free output

The --list-free (-F) argument does not allow machine readable mode. And
it seems that the output format changes over time (different spacing,
using size postfixes instead of raw blocks).

Use sfdisk json output and calculate free partition space ourselfs. This
works for 2.35 and 2.36 and is more robust since we rely on output which
is meant for scripts to parse.

* Migrate defconfigs for Buildroot 2020.11-rc1

In particular, rename BR2_TARGET_UBOOT_BOOT_SCRIPT(_SOURCE) to
BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT(_SOURCE).

* Rebase/remove systemd patches for systemd 246

* Drop apparmor/libapparmor from buildroot-external

* hassos-persists: use /run as directory for lockfiles

The U-Boot tools use /var/lock by default which is not created any more
by systemd by default (it is under tmpfiles legacy.conf, which we no
longer install).

* Disable systemd-update-done.service

The service is not suited for pure read-only systems. In particular the
service needs to be able to write a file in /etc and /var. Remove the
service. Note: This is a static service and cannot be removed using
systemd-preset.

* Disable apparmor.service for now

The service loads all default profiles. Some might actually cause
problems. E.g. the profile for ping seems not to match our setup for
/etc/resolv.conf:
[85503.634653] audit: type=1400 audit(1605286002.684:236): apparmor="DENIED" operation="open" profile="ping" name="/run/resolv.conf" pid=27585 comm="ping" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

buildroot/board/hardkernel/odroidc2/boot.cmd

@@ -0,0 +1,11 @@
+setenv kernel_filename "Image"
+setenv fdt_filename "meson-gxbb-odroidc2.dtb"
+setenv bootargs "console=ttyAML0,115200n8 earlyprintk root=/dev/mmcblk1p2 rootwait rw"
+
+echo > Loading Kernel...
+fatload mmc 0:1 ${kernel_addr_r} ${kernel_filename}
+echo > Loading FDT...
+fatload mmc 0:1 ${fdt_addr_r} ${fdt_filename}
+
+echo > Booting System...
+booti ${kernel_addr_r} - ${fdt_addr_r}

buildroot/board/hardkernel/odroidc2/genimage.cfg

@@ -0,0 +1,38 @@
+image boot.vfat {
+	vfat {
+		files = {
+			"Image",
+			"meson-gxbb-odroidc2.dtb",
+			"boot.scr"
+		}
+	}
+	size = 64M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition bl1 {
+		in-partition-table = "no"
+		image = "bl1.bin.hardkernel"
+		offset = 0
+	}
+
+	partition u-boot {
+		in-partition-table = "no"
+		image = "uboot-odc2.img"
+		offset = 49664
+	}
+
+	partition boot {
+		partition-type = 0xC
+		bootable = "true"
+		image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+	}
+}

buildroot/board/hardkernel/odroidc2/post-image.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+BOARD_DIR="$(dirname $0)"
+
+${HOST_DIR}/bin/fip_create \
+	--bl30 ${BINARIES_DIR}/bl30.bin \
+	--bl301 ${BINARIES_DIR}/bl301.bin \
+	--bl31 ${BINARIES_DIR}/bl31.bin \
+	--bl33 ${BINARIES_DIR}/u-boot.bin \
+	${BINARIES_DIR}/fip.bin
+
+${HOST_DIR}/bin/fip_create --dump ${BINARIES_DIR}/fip.bin
+
+cat ${BINARIES_DIR}/bl2.package ${BINARIES_DIR}/fip.bin \
+	> ${BINARIES_DIR}/boot_new.bin
+
+${HOST_DIR}/bin/amlbootsig ${BINARIES_DIR}/boot_new.bin ${BINARIES_DIR}/u-boot.img
+
+dd if=${BINARIES_DIR}/u-boot.img of=${BINARIES_DIR}/uboot-odc2.img bs=512 skip=96
+
+support/scripts/genimage.sh -c ${BOARD_DIR}/genimage.cfg

buildroot/board/hardkernel/odroidc2/readme.txt

@@ -0,0 +1,64 @@
+ODROID-C2
+
+Intro
+=====
+To be able to use ODROID-C2 board with the images generated by
+Buildroot, you have to prepare the SDCard or eMMC.
+
+How to build it
+===============
+
+  $ make odroidc2_defconfig
+
+Then you can edit the build options using
+
+  $ make menuconfig
+
+Compile all and build rootfs image:
+
+  $ make
+
+Note: you will need to have access to the network, since Buildroot will
+download the packages' sources.
+
+Result of the build
+-------------------
+
+After building, you should obtain this tree:
+
+    output/images/
+    +-- bl1.bin.hardkernel
+    +-- bl2.package
+    +-- bl301.bin
+    +-- bl30.bin
+    +-- bl31.bin
+    +-- boot_new.bin
+    +-- boot.scr                   [1]
+    +-- boot.vfat
+    +-- fip.bin
+    +-- Image                      [2]
+    +-- meson-gxbb-odroidc2.dtb
+    +-- rootfs.ext2
+    +-- rootfs.ext4
+    +-- rootfs.tar
+    +-- sdcard.img
+    +-- u-boot.bin
+    +-- u-boot.img
+    +-- uboot-odc2.img             [3]
+
+[1] This is the ODROID-C2 configuration file used in u-boot.
+[2] This is the ODROID-C2 kernel image file which will be booted.
+[3] This is the ODROID-C2 signed u-boot image which will be used.
+
+How to write the SD card or eMMC
+================================
+
+Once the build process is finished you will have an image called "sdcard.img"
+in the output/images/ directory.
+
+Copy the bootable "sdcard.img" onto an SD card or eMMC with "dd":
+
+  $ sudo dd if=output/images/sdcard.img of=/dev/sdX
+
+Insert the SDcard into your ODROID-C2, and power it up. Your new system
+should come up now.

buildroot/board/hardkernel/odroidc2/rootfs_overlay/etc/init.d/S09modload

@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+
+load_drivers()
+{
+	echo "Loading needed modules..."
+	for file in $(echo "dwmac_generic dwmac-meson8b meson_dw_hdmi meson_gxbb_wdt"); do
+		modprobe ${file}
+	done
+}
+
+case "$1" in
+	start)
+		load_drivers
+		;;
+	stop)
+		;;
+	restart|reload)
+		;;
+	*)
+		echo "Usage: $0 {start|stop|restart}"
+		exit 1
+esac