Re: GPIO driver for Intel Atom SoC

On Sun, Jun 12, 2016 at 11:02 AM, Ian Lepore <ian_at_freebsd.org> wrote:

>
> Why do we need gpio support for emmc/sdhci?  Is there a power-enable
> pin that has to be asserted or something?  I don't think we have an API
> that lets an arbitrary driver which is not a child of the gpiobus
> manipulate pins, outside of the FDT world.
>
> -- Ian
>
>
Yes, emmc need to be activated/enabled using GPIO.
That's only one of many things we need GPIO for.

The chip is Atom Z8000 (Cherryview, but this is also applicable to Baytrail
(Z3000))

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