linux-kernel - Re: [PATCH 1/2] dw_dmac: make driver endianness configurable

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Date:	Tue, 28 Aug 2012 12:35:29 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Hein Tibosch <hein_tibosch@...oo.es>
Cc:	Hans-Christian Egtvedt <egtvedt@...fundet.no>,
	spear-devel <spear-devel@...t.st.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"ludovic.desroches" <ludovic.desroches@...el.com>,
	Havard Skinnemoen <havard@...nnemoen.net>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd.bergmann@...aro.org>
Subject: Re: [PATCH 1/2] dw_dmac: make driver endianness configurable

On 28 August 2012 12:25, Hein Tibosch <hein_tibosch@...oo.es> wrote:
> What about this:
>
> In case of AVR32, the arch code will indicate:
>
> static struct dw_dma_platform_data dw_dmac0_data = {
>         .nr_channels    = 3,
>         /* DMAC supports up to 32-bit memory access */
>         .mem_access_32_bit_only = true,
> };
>
> ARM users won't have to change anything because mem_access_32_bit_only
> will be false and therefor 'dw->mem_64_bit' will become true

I will go for the earlier solution that you sent: with max-mem-width.
0 = 64 bit, so nothing to be changed for ARM as global structures would be
getting initialized to zero
1=32 bit, pass this for AVR32.

--
viresh
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