Hi Sergio,
I could get the ADC7606 interfaced with SPI 1 to work. I was just calling spi_registration & using SPI api's just like in arduino without configuring the GPIO mux [42,43,54,55] for selecting the SPI 1.
To interface to SPI 1, GPIO mux selectors 42,43,54,55 need to be set to 0.
- Regards
Simba