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Re: [PATCH v2 1/2] usb: chipidea: big-endian support

To: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Subject: Re: [PATCH v2 1/2] usb: chipidea: big-endian support
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Thu, 28 Mar 2013 15:15:39 +0100
Cc: Svetoslav Neykov <svetoslav@neykov.name>, Ralf Baechle <ralf@linux-mips.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Gabor Juhos <juhosg@openwrt.org>, John Crispin <blogic@openwrt.org>, Alan Stern <stern@rowland.harvard.edu>, "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>, linux-mips@linux-mips.org, linux-usb@vger.kernel.org
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On 03/28/2013 10:28 AM, Alexander Shishkin wrote:
> Svetoslav Neykov <svetoslav@neykov.name> writes:
> 
>> Convert between big-endian and little-endian format when accessing
>> the usb controller structures which are little-endian by
>> specification. Fix cases where the little-endian memory layout is
>> taken for granted. The patch doesn't have any effect on the already
>> supported little-endian architectures.

Has anyone tested how the cpu_to_le32 and vice versa effects the
load/store operations? Does the compiler generate full 32 bit accesses
on mips (and big endian arm) or is a byte-shift-or pattern used?

Marc
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