linux-kernel - Re: [PATCH] dmaengine: bcm2835: Add slave dma support

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Message-ID: <553140F2.5040900@tronnes.org>
Date:	Fri, 17 Apr 2015 19:20:50 +0200
From:	Noralf Trønnes <noralf@...nnes.org>
To:	Stefan Wahren <info@...egoodbye.de>, dmaengine@...r.kernel.org,
	vinod.koul@...el.com
CC:	dan.j.williams@...el.com, jonathan@...pberrypi.org,
	linux-kernel@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org
Subject: Re: [PATCH] dmaengine: bcm2835: Add slave dma support

Hi Stefan,

Den 17.04.2015 19:08, skrev Stefan Wahren:
> Hi Noralf,
>
> Am 17.04.2015 um 00:09 schrieb Noralf Trønnes:
>>
>> Den 15.04.2015 21:00, skrev Stefan Wahren:
>>> Hi Noralf,
>>>
>>> Am 15.04.2015 um 11:56 schrieb Noralf Trønnes:
>>>> Add slave transfer capability to BCM2835 dmaengine driver.
>>>> This patch is pulled from the bcm2708-dmaengine driver in the
>>>> Raspberry Pi repo. The work was done by Gellert Weisz.
>>>>
>>>> Tested with the bcm2835-mmc driver from the same repo.
>>>
>>> why not with the upstream kernel?
>>>
>>
>> See my answer to Alexander Stein.
>
> i read the mail, but i'm still confused. Please let me paraphrase my 
> last question:
>
> Is this patch testable with upstream kernel?
>

Sorry, I misread you.
This patch was made against mainline 4.0-rc7, not the Raspberry Pi repo.
I then used the bcm2835-mmc driver in mainline to be able to test the
functionality.

> It would be helpful to put those facts from the email to Alexander into
> the patch description. Please clarify the intension of your patch.
>

 From my point of view, the mmc driver is a discussion of it's own.
This patch provides functionality that other drivers can make use of as 
well.
Martin Sperl will soon start working on DMA support for spi-bcm2835,
relying on this patch to make that happen.


Noralf.

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