I’ve been trying to get some form of low power mode working on the TK1. I have noticed that LP0/LP1 testing is in the roadmap for the BSP, but I am looking for a workaround till that is ready. I was thinking if the TK1 could be completely shut down (or maybe just the core clock set to 0Hz) while the K20 is still running? The K20 could then reset the TK1 on detection of appropriate event using an external GPIO tied to to the module’s reset line.
Is this a possibility? I understand that this would require custom firmware for K20 and some kernel drivers for TK1, but from a hardware perspective, are the power buses or reset lines of the TK1 and the K20 coupled? Or can they be controlled independently?