linux-kernel - Re: [PATCH] dma: mmp_tdma: add multiple burst size support for 910-squ

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Date:	Fri, 11 Oct 2013 09:08:25 +0800
From:	Qiao Zhou <zhouqiao@...vell.com>
To:	zhangfei gao <zhangfei.gao@...il.com>
CC:	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Chao Xie <cxie4@...vell.com>
Subject: Re: [PATCH] dma: mmp_tdma: add multiple burst size support for 910-squ

On 10/10/2013 09:54 PM, zhangfei gao wrote:
> On Wed, Oct 9, 2013 at 1:40 PM, Qiao Zhou <zhouqiao@...vell.com> wrote:
>> add multiple burst size support for 910-squ.
>>
>> Signed-off-by: Qiao Zhou <zhouqiao@...vell.com>
>> ---
>>   drivers/dma/mmp_tdma.c |   25 ++++++++++++++++++++++++-
>>   1 files changed, 24 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
>> index 38cb517..d84354b 100644
>> --- a/drivers/dma/mmp_tdma.c
>> +++ b/drivers/dma/mmp_tdma.c
>> @@ -228,8 +228,31 @@ static int mmp_tdma_config_chan(struct mmp_tdma_chan *tdmac)
>>                          return -EINVAL;
>>                  }
>>          } else if (tdmac->type == PXA910_SQU) {
>> -               tdcr |= TDCR_BURSTSZ_SQU_32B;
>>                  tdcr |= TDCR_SSPMOD;
>> +
>> +               switch (tdmac->burst_sz) {
>> +               case 1:
>> +                       tdcr |= TDCR_BURSTSZ_SQU_1B;
>> +                       break;
>> +               case 2:
>> +                       tdcr |= TDCR_BURSTSZ_SQU_2B;
>> +                       break;
>> +               case 4:
>> +                       tdcr |= TDCR_BURSTSZ_SQU_4B;
>> +                       break;
>> +               case 8:
>> +                       tdcr |= TDCR_BURSTSZ_SQU_8B;
>> +                       break;
>> +               case 16:
>> +                       tdcr |= TDCR_BURSTSZ_SQU_16B;
>> +                       break;
>> +               case 32:
>> +                       tdcr |= TDCR_BURSTSZ_SQU_32B;
>> +                       break;
>> +               default:
>> +                       dev_err(tdmac->dev, "mmp_tdma: unknown burst size.\n");
>> +                       return -EINVAL;
>> +               }
>
> Sorry, do I make mistake,
> Not find definition TDCR_BURSTSZ_SQU_16B ~
> Only find
> #define TDCR_BURSTSZ_SQU_32B    (0x7 << 6)
uploaded the wrong version. sorry. I have already submitted the v2 
patch. thanks.
>
> Thanks
>


-- 

Best Regards
Qiao
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