I’ve been configuring, building, and testing both rootfs and boot images on my board. My build/test setup is somewhat remote and it has been inconvenient to have to press VOL_N at startup every time I want to test a new image. On Android, one can simply enter the command “adb reboot-bootloader” and the system will reboot into fastboot mode. I’m mostly interested in whether something like this has been implemented for embedded linux distros. Is there a USB gadget driver that enables something similar to adb interface on Android?
Is there an easier way to enter fastboot mode or ultimately flash rootfs and boot images without having to press VOL_N?