[Soekris] Default Power-On State of GPIO

[Poul-Henning Kamp]

In message <34ddf8640711121438y2452770en13ab7d0202b635fe at mail.gmail.com>, "Rich
ard Walker" writes:

>Is there a way to set the default power-on state of the GPIO pins on
>the Net4801 to low?  I noticed that they all pull high (3.3V) on
>power-on.  I checked the BIOS and didn't see any relevant parameters
>there.  I'm using the box for an application that I'd much rather have
>the box start with all pins low.

I belive all the pins power on to inputs, possibly with a pull-up
enabled.

I don't think there is any way to change that.  Even if the bios did
it, you would still have a short window from reset until the bios
got around to that.

I usually configure outputs as open drain, pull them up and invert
as necessary to get the desired default state in the glue electronics.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.