Dear Marcin Wojtas,
On Thu, 13 Nov 2014 00:49:50 +0100, Marcin Wojtas wrote:
> This commit fixes ehci-orion operation in big-endian mode by enabling byteswap
> when accessing registers using 'rdl' and 'wrl' macros.
>
> Signed-off-by: Grzegorz Jaszczyk <jaz@xxxxxxxxxxxx>
> Signed-off-by: Marcin Wojtas <mw@xxxxxxxxxxxx>
> Reviewed-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Tested-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Indeed, on Armada XP GP, without this patch, no USB devices are
detected when the kernel runs in big endian mode. With this patch
applied, a USB key is properly detected and I can mount/access it.
Moreover, using {readl,writel}_relaxed() is safe here: even though
those I/O accessors are not yet available on all architectures, the
ehci-orion driver has a "depends on PLAT_ORION", so it can only be
enabled on ARM, which has those accessors available.
Greg, Alan, could you apply Marcin's patch?
Thanks!
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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