On Sat, Jan 9, 2021 at 3:55 AM Drew Fustini [off-list ref] wrote:

I discussed my use case and this patch on #armlinux earlier this week
and Alexandre Belloni suggested looking at the pinmux-pins debugfs file.

This sounds reasonable.

This made me think that a possible solution could be to define a store
function for pinmux-pins to handle something like "<pin#> <function#>".
I believe the ability to activate a pin function (or pin group) from
userspace would satisfy our beagleboard.org use-case.

Does that seem like a reasonable approach?

This sounds like a good approach.

Yours,
Linus Walleij