From: "Travis B. Sawyer" <tsawyer+linuxppc@sandburst.com>
To: Matt Porter <mporter@kernel.crashing.org>
Cc: Ralph Siemsen <rsiemsen@rossvideo.com>,
ppcembed <linuxppc-embedded@ozlabs.org>
Subject: Re: 2.6 4xx GPIO OCP driver?
Date: Sat, 26 Feb 2005 17:31:20 -0500 [thread overview]
Message-ID: <4220F8B8.7040407@sandburst.com> (raw)
In-Reply-To: <20050225172941.A30499@cox.net>
Matt Porter wrote:
> On Fri, Feb 25, 2005 at 04:19:41PM -0500, Ralph Siemsen wrote:
>>Will that work on the 440 where the devices sit above 4GB mark? Or must
>>one rely on there being an existing TLB mapping to bring them into
>>32-bit space?
EINVAL.
mmap certainly didn't like the phys address of gpio. Tried that.
>
>
> Ack...that's the one thing we are missing. :-/ I had forgotten
> that driver/char/mem.c calls remap_pfn_range() directly rather
> than io_remap_page_range(). Had it called the latter, we'd be OK
> since the "bigphys" fixup could take place. We can fix /dev/mem to
> call io_remap_page_range() when on ppc32 && 36-bit phys...other arches
> do similar tricks in that driver.
>
Sounds like a plan, I'd be happy to test it out.
> If everybody is happy with mmaping /dev/mem then we can go try that
> route.
>
Thanx,
Travis
next prev parent reply other threads:[~2005-02-26 22:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-25 19:40 2.6 4xx GPIO OCP driver? Steven Blakeslee
2005-02-25 20:25 ` Travis B. Sawyer
2005-02-25 20:30 ` Matt Porter
2005-02-25 20:51 ` Travis B. Sawyer
2005-02-25 21:19 ` Ralph Siemsen
2005-02-26 0:29 ` Matt Porter
2005-02-26 22:31 ` Travis Sawyer
2005-02-26 22:31 ` Travis B. Sawyer [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-02-25 17:17 Travis B. Sawyer
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