linux-kernel - Re: Query on I/O accessors used by Xilinx SystemACE Driver

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Date:	Tue, 22 Jan 2013 09:09:30 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Michal Simek <monstr@...str.eu>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: Query on I/O accessors used by Xilinx SystemACE Driver

On Mon, 2013-01-21 at 18:50 +0530, Vineet Gupta wrote:
> I'm not an expert in that driver or the specific needs of those accessors on
> respective arches, but was wondering, if it would be possible to convert the
> driver to use the vanilla IO accessors (read{b,w,l}. Microblaze at least,  seem to
> be defining them as straight wrappers over the standard raw accessors.
> 
> Ben, Geert could you please comment ?

If your HW is little-endian, then by all means use the standard accessors, either
readb,w,l or the iomap.h ones (ioread*)

Cheers,
Ben.


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