Maybe you could try to send I2C commands to the LED controllers and make them fancy blinkingThis is my main.c code, with some include statements and comments removed for brevity:
I think my next step is to either get an RPMsg demo up and running or start poking the TWL6037 PMIC. Not sure which one is easiest Maybe I'll start with simply flipping a GPIO pin?
Or read out the Fuel Gauge chip.
What I have no idea is how to prevent the kernel on the A15 cores from trying the same at the same moment...