Re: [PATCH 06/13] iio: buffer: add hardware triggered buffer support

[Jonathan Cameron]

On Wed, 10 Jan 2024 13:49:47 -0600
David Lechner <dlechner@xxxxxxxxxxxx> wrote:

> This adds a new mode INDIO_HW_BUFFER_TRIGGERED to the IIO subsystem.
> 
> This mode is essentially the hardware version of INDIO_BUFFER_TRIGGERED
> where the trigger has the semantics of INDIO_HARDWARE_TRIGGERED and the
> buffer has the semantics of INDIO_BUFFER_HARDWARE.
> 
> So basically INDIO_HW_BUFFER_TRIGGERED is the same as
> INDIO_BUFFER_HARDWARE except that it also enables the trigger when the
> buffer is enabled.

If the trigger isn't routeable to multiple devices we normally don't
make it visible at all.

I'm not yet understanding what a trigger actually means in this case.
Why do you need it to be userspace configurable?

J