Thanks Charles. Read this last night, and been meaning to thank you for the
information. But kept getting sidetracked . .. gpio-of-helper, I have not
been able to find decent documentation on that, but I have not looked
recently. Probably somewhere in linux/documentation/ . . .
On Wed, Jul 27, 2016 at 6:00 AM, Charles Steinkuehler <
char...@steinkuehler.net> wrote:
> On 7/27/2016 12:33 AM, William Hermans wrote:
> > Charles,
> >
> > Is there a way through modifying your overlay files to put an output pin
> in a
> > specific state as the overlay file is loaded ? I noticed one can change
> input to
> > output as needed in fragment@2. But do not see a way to change pin
> state. unless
> > if it'll work if i replace "input" with hi, or low ? I've replaced with
> "output"
> > and that works . . . e.g.
> >
> > P8_07 {
> > gpio-name = "P8_07";
> > gpio = <&gpio2 2 0>;
> > dir-changeable;
> > };
>
> The pin exporting is done by the gpio-of-helper kernel module, so you
> can use anything that driver understands, like init-high or init-low:
>
> P8_07 {
> gpio-name = "P8_07";
> gpio = <&gpio2 2 0>;
> output;
> init-high;
> };
>
> --
> Charles Steinkuehler
> char...@steinkuehler.net
>
> --
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