Hi Pratyush,
when an i.MX device boots it thows in the boot log some information like following:
Freescale i.MX Release Distro 4.1.15-2.1.0 imx6ull14x14evk /dev/ttymxc0
imx6ull14x14evk login:
An option could be to edit the Yocto recipe that shows this information en increase the number each time it build.
Regards,
Carlos
NXP Technical Support
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