Yes, freescale supports linux quite well on their platforms, in the past I had an Udoo, a board with imx6 quad.
I will try with Ubuntu for devices, they have a dual boot app that let you to select android or Ubuntu and this would let me to avoid to kill the ebook reader while experimenting.
Here there is the list of supported (or partially supported) devices:
https://wiki.ubuntu.com/Touch/Devices
May be there is a device with similar hardware, mainly I am worried about the wifi, the SD controller and the touch screen, the cpu is an armv7 with hard fp support so it will run almost every distribution and I can obtain gpu 2d hardware acceleration with some stuff from imx6 kernel sources distribution)
This weekend I will do some tests!