From: Arnd Bergmann <arnd@arndb.de>
To: Hein Tibosch <hein_tibosch@yahoo.es>
Subject: Re: [PATCH REGRESSION FIX] dw_dmac: make driver's endianness configurable
Date: Sun, 14 Oct 2012 19:09:33 +0000
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Cc: Andrew Morton <akpm@linux-foundation.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        viresh kumar <viresh.kumar@linaro.org>,
        "spear-devel" <spear-devel@list.st.com>,
        "Hans-Christian Egtvedt" <egtvedt@samfundet.no>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "ludovic.desroches" <ludovic.desroches@atmel.com>,
        Havard Skinnemoen <havard@skinnemoen.net>,
        Nicolas Ferre <nicolas.ferre@atmel.com>
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On Sunday 14 October 2012, Hein Tibosch wrote:
> From: Hein Tibosch <hein_tibosch@yahoo.es>
> 
> The dw_dmac was originally developed for avr32 to be used with the Synopsys
> DesignWare AHB DMA controller. Starting from 2.6.38, access to the device's i/o
> memory was done with the little-endian readl/writel functions(1)
> 
> This broke the driver for the avr32 platform, because it needs big (native)
> endian accessors.
> This patch makes the endianness configurable using 'DW_DMAC_BIG_ENDIAN_IO',
> which will default be true for AVR32
> 
> I submitted this patch before(2) but then waited for Andy to finish other
> changes to the same module(3).
> 
> (1) https://patchwork.kernel.org/patch/608211
> (2) https://lkml.org/lkml/2012/8/26/148
> (3) https://lkml.org/lkml/2012/9/21/173
> 
> Signed-off-by: Hein Tibosch <hein_tibosch@yahoo.es>

Acked-by: Arnd Bergmann <arnd@arndb.de>
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