On a discovery board with a wm8994 should I be able to both read and write all control registers over i2c?
I am trying to verify settings by reading them back after writing. I get reliable reads from some of the lower registers (under 0x0100), but above that I generally get 0.
I can't see anything in the data sheet saying I can't read from them, but wanted to double check before I start a possibly fruitless investigation.
Thanks,
Stephen
