Re: Interrupt questions

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

Vincent DEFERT <vincent.defert%posteo.net@localhost> wrote:
> What is PIO mode?

Pages 290/1 of the Datasheet.

It describes using the RXDATA and TXDATA registers to read and write
data instead of using DMA.

There are interrupt status bits for the fifos as well as for DMA.

> For the clock, I see in meson-gxbb.dts that i2c_A's clock is CLKID_I2C, 
> and in gxbb-clkc.h that CLKID_I2C is 22, but I have no clue what it means.
> At least, it appears to be in the correct domain (not the Always On domain).

How are you enabling the clocks for this device in your driver?