clearfog: Implement USB booting
Here's how to load this from a possible bricked device:
1) Set the boot switches to 01001 (yes, it's different from what the doc
says)
2) Load the bootloader via UART, e.g.:
`./tools/kwboot -b ./u-boot-spl.kwb -t -p /dev/ttyUSB0`
3) Interrupt U-Boot's autoboot to get a prompt
4) Plug a USB flash with images/usb-flash.img loaded
5) One on the U-Boot prompt, execute:
`usb start; fatload usb 0:1 00800000 usb-boot.scr; source 00800000`
6) Get a nice emergency shell
Change-Id: Icef4badc9105bbed78ad949c060c0a46e9ff7f76
diff --git a/configs/czechlight_clearfog_defconfig b/configs/czechlight_clearfog_defconfig
index e6a5a7e..a09bf97 100644
--- a/configs/czechlight_clearfog_defconfig
+++ b/configs/czechlight_clearfog_defconfig
@@ -40,6 +40,9 @@
# BR2_PACKAGE_SYSTEMD_HWDB is not set
BR2_PACKAGE_VIM=y
# BR2_PACKAGE_VIM_RUNTIME is not set
+BR2_TARGET_ROOTFS_CPIO=y
+BR2_TARGET_ROOTFS_CPIO_GZIP=y
+BR2_TARGET_ROOTFS_CPIO_UIMAGE=y
BR2_TARGET_ROOTFS_EXT2=y
BR2_TARGET_ROOTFS_EXT2_4=y
BR2_TARGET_ROOTFS_EXT2_SIZE="256M"
@@ -59,6 +62,7 @@
BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-spl.kwb"
BR2_TARGET_UBOOT_BOOT_SCRIPT=y
BR2_TARGET_UBOOT_BOOT_SCRIPT_SOURCE="$(BR2_EXTERNAL_CZECHLIGHT_PATH)/board/czechlight/clearfog/boot.scr.txt"
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
BR2_PACKAGE_HOST_GENIMAGE=y
BR2_PACKAGE_HOST_RAUC=y
BR2_PACKAGE_HOST_SQUASHFS=y