[RFC PATCH 01/16] ASoC: pcm512x: expose 6 GPIOs

[Linus Walleij]

On Tue, Apr 14, 2020 at 7:09 PM Andy Shevchenko
<andriy.shevchenko at linux.intel.com> wrote:
> On Thu, Apr 09, 2020 at 02:58:26PM -0500, Pierre-Louis Bossart wrote:
> > The GPIOs are used e.g. on HifiBerry DAC+ HATs to control the LED
> > (GPIO3) and the choice of the 44.1 (GPIO6) or 48 (GPIO3) kHz
> > oscillator (when present).
> >
> > Enable basic gpio_chip to get/set values and get/set
> > directions. Tested with GPIO_LIB from sys/class/gpio, the LED turns
> > on/off as desired.
>
>
> One question, can this use existing GPIO infrastructure, like bgpio_init()?
> Ah, I see, that one operates over MMIO, while we would need something based on
> regmap API.
>
> Bartosz, do we have plans to have bgpio_regmap_init() or alike?

Michael Walle is working on that:
https://lore.kernel.org/linux-gpio/20200402203656.27047-11-michael@walle.cc/

I think we should try to merge it sooner rather than later.
I can provide an ib-* branch for ASoC whenever we agreed
on a basic generic driver.

Yours,
Linus Walleij