From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Wed, 28 Nov 2012 09:44:09 +0100
From: Roland Stigge <stigge@antcom.de>
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Subject: Re: [Xenomai] GPIO in Xenomai
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To: Stefan Roese <stefan.roese@gmail.com>
Cc: xenomai@xenomai.org

On 11/28/2012 08:12 AM, Stefan Roese wrote:
> I'm looking for a way to use the SoC GPIO's (MPC5200) in an RT thread.
> Accessing them via the sysfs (the Linux userspace way) is not an option
> since we need to access the GPIO's at a quite high frequency.
> 
> How could the Linux gpiolib infrastructure best be exposed to RT
> threads? Has this been discussed before? Any ideas about the "best"
> approach here?

Have you seen my block gpio patches (v7) that I posted recently to the
kernel list? It now contains a dev interface - much faster than sysfs,
and can operate on several GPIOs at once.

I can re-post here if it helps.

Thanks,

Roland