Re: [PATCH v1 6/7] mfd: lpc_ich: Add support for pinctrl in non-ACPI system

Andy Shevchenko
2021-04-12T17:01:13Z

On Mon, Apr 12, 2021 at 06:40:01PM +0200, Henning Schild wrote:
> Tan or Andy,
>
> maybe you can point me to a user of that patch. I guess there might be
> an out-of-tree driver or userland code on how to use the GPIOs from
> there.

I'm confused. User of this patch is pinctrl-broxton driver.
It's in upstream.

Using GPIOs from it is something as done in a few drivers already
(Assuming we have no resources described in the ACPI). I.e. you need to
register in board file the GPIO mapping table with help of
devm_acpi_dev_add_driver_gpios() and use one of gpiod_get() family of functions
to request it.

In case of LEDs you simple describe GPIO device name in lookup table and
that's it. The drivers/platform/x86/pcengines-apuv2.c not the best but
will give you an idea how to use "leds-gpio" driver in board files.

> Feel free to send directly to me in case it is not published anywhere
> and should not yet be on the list, i could just use it for inspiration.
> A driver will likely be GPL anyways.

--
With Best Regards,
Andy Shevchenko