Re: Interrupt questions

[Vincent DEFERT <vincent.defert%posteo.net@localhost>]

Page 290 is for SPI, I'm using I2C starting page 305.

To enable the clock, I do:

    sc->clk = fdtbus_clock_get_index(phandle, 0);

    if (sc->clk == NULL || clk_enable(sc->clk) != 0) {
        aprint_error_dev(self, "couldn't enable clock\n");
        return;
    }

Following your suggestion, I submit my code for review and help in a 
separate email.

On 25/06/2025 18:19, Robert Swindells wrote:
> 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?