From: Anton Vorontsov <avorontsov@ru•mvista.com>
To: Trent Piepho <tpiepho@freescale•com>
Cc: linuxppc-dev@ozlabs•org
Subject: Re: [v5] powerpc: gpio driver for mpc8349/8572/8610 and compatible
Date: Thu, 30 Oct 2008 21:04:36 +0300 [thread overview]
Message-ID: <20081030180436.GA4975@oksana.dev.rtsoft.ru> (raw)
In-Reply-To: <Pine.LNX.4.64.0810291718350.25957@t2.domain.actdsltmp>
On Wed, Oct 29, 2008 at 06:07:47PM -0700, Trent Piepho wrote:
[...]
> But, I'm using the GPIOs to bit-bang a JTAG bus in the 20-30 MHz range. The
> obvious GPIO driver is *much* too slow for that. I got less than 3 MHz, and
> your driver looks like it might be slightly slower than my initial driver.
You can implement rapid (inlined) SOC-specific versions of
gpio_{get,set}_value() functions. And they can co-exist with the
gpiolib. It is quite easy to do.
--
Anton Vorontsov
email: cbouatmailru@gmail•com
irc://irc.freenode.net/bd2
prev parent reply other threads:[~2008-10-30 18:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-23 15:35 [PATCH v5] powerpc: gpio driver for mpc8349/8572/8610 and compatible Peter Korsgaard
2008-09-23 15:42 ` Kumar Gala
2008-10-30 1:07 ` [v5] " Trent Piepho
2008-10-30 7:45 ` Peter Korsgaard
2008-10-30 8:58 ` Trent Piepho
2008-10-30 13:44 ` Kumar Gala
2008-10-30 14:39 ` Nate Case
2008-10-30 18:04 ` Anton Vorontsov [this message]
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