Lenovo is the only company to have released an Android Nougat update for an Intel Atom Cherry Trail SoC powered device. 

If Lenovo releases the kernel sources for the Android N version created for its Lenovo Yoga Book (Lenovo YB1-X90F/L), developers can start working on Android N upgrades for other devices powered by the Intel Atom Cherry Trail SoCs.

Lenovo has previously released the Android Marshmallow kernel sources for the Yoga Book (https://pcsupport.lenovo.com/us/en/products/tablets/yoga-series/yoga-book/downloads/ds118515 Thus it shouldn't be a problem abiding by the General Public License v2 (GPLv2), which requires Android device makers to publish the kernel source code.

Please sign this petition if you want the kernel source code to be available.