The problem I often see with "open" devices like that is that they typically work with exactly one Linux kernel binary that shipped with the device. They usuall

The problem I often see with "open" devices like that is that they typically work with exactly one Linux kernel binary that shipped with the device. They usually don't work with upstream kernels. Even if you can get original kernel source, it might not be trivial to get it to compile. Porting the required changes to a newer kernel once a security vulnerability was discovered can be very time consuming.