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Allow to Wipe essential boot files to trigger boot from USB host (#2034)

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This makes the Red+Blue Button cause the boot loader to wipe start4.elf,
which is essential for the boot loader to boot from eMMC. With the file
missing, the Raspberry Pi firmware will continue its boot flow and boot
from USB host next. This allows to run the Home Assistant OS Installer
from a USB flash drive again.
This commit is contained in:
Stefan Agner 2022-07-27 14:53:47 +02:00
parent 67ecb0fb26
commit 0ef46fdafa
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1 changed files with 8 additions and 0 deletions
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8
buildroot-external/board/raspberrypi/yellow/uboot-boot64.ush
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@ -20,8 +20,16 @@ test -n "${BOOT_B_LEFT}" || setenv BOOT_B_LEFT 3
# HassOS bootargs
setenv bootargs_hassos "zram.enabled=1 zram.num_devices=3 apparmor=1 security=apparmor rootwait systemd.machine_id=${MACHINE_ID} cgroup_enable=memory fsck.repair=yes"
# Red Button pressed?
if gpio input GPIO27; then
sleep 1
# ... and Blue Button Pressed?
if gpio input GPIO26; then
echo "Boot wipe has been pressed, deleting boot files to trigger USB boot..."
fatrm mmc 0:1 /start4.elf
reset
fi
# Red still pressed?
if gpio input GPIO27; then
echo "Device wipe button has been pressed, setting wipe flag..."
setenv bootargs_hassos "${bootargs_hassos} haos.wipe=1"