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Date: Sun, 14 Aug 2005 12:36:16 -0400
To: Shawn Jin <shawnxjin@gmail.com>
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From: a.othieno@bluewin.ch (Arthur Othieno)
Cc: ppcembed <linuxppc-embedded@ozlabs.org>
Subject: Re: writel(), readl() in <asm-ppc/io.h>
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On Sat, Aug 13, 2005 at 08:56:50PM -0700, Shawn Jin wrote:
> > read*()/write*() are accessors for PCI and PCI only.  PCI is little
> 
> If read*()/write*() are designed for PCI access only as you claimed,
> that explains why they call in/out_leXX() funcitons.
> 
> The problem is that read*()/write*() are misused in some places, e.g.,
> serial drivers such as serial8250. The serial_in() and serial_out()
> call read*() and write*() respectively. So what's your recommendation
> in such a case?
 
See here for the gory details:

  http://lwn.net/Articles/102232/
  http://lwn.net/Articles/132804/

	Arthur