Normally, I2C is used for communicating with various peripherals, and since the Power management, RTC and Audio involves communicating with an I2C peripheral, it is likely that support is needed to make that work on the Letux 400.
The data register (DR) is arranged as follows:
The control register (CR) is arranged as follows:
The status register (SR) is arranged as follows:
|1||Data receive failure|
The gate/divider register (GR) is arranged as follows:
In modern kernels, the following files are pertinent: