customizing u-boot, forgive my basic question.
To implement a
factory reset, my initramfs expects a ‘factoryreset’ kernel
parameter to format an overlay FS partition before mounting it.
The target machine
is a Tegra TX2.
I’m able to use
the Volume Up button for factory reset, which is gpio-313 . When
starting the board if I press the button say 5s, I’d like to add
the ‘factoryreset’ parameter to the boot parameters
I think I could use
this syntax @uboot_var('factoryreset') in the KERNEL_ROOTSPEC
variable and have the variable set either to '' or 'factoryreset'
Maybe, I should append distro_bootcmd to add the gpio pin reading to set factoryreset variable before proceeding with the boot sequence.
But how can I add
the variable and have it set if the if the gpio pin is at a certain