I didn't opened the ebook reader yet but I am quite sure that there are 2/4 pins for ttl, the kernel command line shows the imx6 serial port enabled for logging.
After the kernel panic, having the ebook reader connected via usb, a device shows up and after looking around it seems to be an imx6 recovery device that let you to flash the internal memory, but I didn't tried it.
Right now, I stopped to do tests, no time because of work, but I hope they will release the kernel sources, it is under gpl!
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