I'm wondering if anyone here has done any work on using Yocto to build a system image for a Kobo reader.
I'm kind of interested in having a clean and relatively modern base to develop on for the Clara HD, since I'm not interested in preserving the e-reader functionality.
NXP's Yocto BSP is based on Yocto 3.0 (Zeus) and Linux kernel 5.4, which is much more recent that the kernels shipped by Kobo. That BSP should contain all the necessary support for the i.MX6SLL processor in the Clara HD and readers with similar hardware.
It seems that someone has added
device tree configuration for the Clara HD in mainstream Linux kernels (on the 5.7 branch) but mainstream kernels will be lacking support for NXP's special hardware. The particular problem there would be the EPDC e-ink controller.
I've got a fair amount of experience with Yocto but that's on our own hardware where we have all the schematics and data sheets. I fear it might be tricky to get all the relevant information to get the Clara HD's hardware working, unless it's sufficiently similar to the NXP evaluation kit design.