Re: [PATCH v4 2/3] dw_dmac: max_mem_width limits value forSRC/DST_TR_WID register
From: Viresh Kumar
Date: Mon Sep 03 2012 - 04:58:58 EST
On 3 September 2012 14:19, Andy Shevchenko <andy.shevchenko@xxxxxxxxx> wrote:
> On Mon, Sep 3, 2012 at 11:30 AM, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
>> Which register are you talking about? This configuration is outside of DMAC
>> controller and i am not sure if dw DMAC controller can do 128 or 256
>> bit transfers.
> SRC_WIDTH & DST_WIDTH in CTLx. The field are 3 bit long. Acceptable
> values from 0 to 5.
> 2 corresponds to 32 bit transfers.
The field is 3 bit long but only allowable values are 0,1,2 & 3... This is what
i can check in my copy of dw_dmac manual.
4 and 5 aren't valid values.
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