On Mon, Jul 18, 2022 at 9:50 AM Nuno Sá [off-list ref] wrote:

quoted

right in that the character device is the only way to set this mode
ATM and. However I would like to see the first user added together
with the series because adding features nobody uses in the mainline
kernel tree is generally frowned upon and it's also not clear that
anyone actually wants to use it.

Hmm, you mean something like a system's devicetree needing this flag?
If so, I don't really have such a thing. I did all my testing on a rpi
using overlays.

I would assume a driver with a .set_config() responding to this flag?

I actually think some gpio drivers using pin control as back-end
such as
drivers/pinctrl/bcm/pinctrl-bcm2835.c
will do this out-of-the box after this patch but I may be wrong.

To me supporting this on the Rpi driver is a good enough demonstrator
of the usefulness.

Yours,
Linus Walleij