From: fkan@apm.com (Feng Kan)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/6] i2c: busses: add SLIMpro I2C device driver on APM X-Gene platform
Date: Mon, 2 Feb 2015 14:15:44 -0800 [thread overview]
Message-ID: <CAL85gmD+0cJfZoWo8ujmjwy9yaKjNPjJaUm00Vrv5o9kcg-ozA@mail.gmail.com> (raw)
In-Reply-To: <20150130061118.GA995@katana>
On Thu, Jan 29, 2015 at 10:11 PM, Wolfram Sang <wsa@the-dreams.de> wrote:
>
>> > ctx->dev is probably the wrong device here. The i2c controller is not
>> > DMA capable itself, you need to have a pointer to the device that actually
>> > performs the DMA here.
>>
>> Arnd, I do agree this may not be the best identification. There is no
>> representation for this on the Linux side. I could put it as NULL. However,
>> there are other i2c bus drivers that seem to do the same thing. Please
>> let me know what you think.
>
> For completeness: Those drivers need fixing!
I have some doubts. I could hack up a dts node for the helper
processor that is doing the dma. However, the dma master could be
anything for that matter. I am not sure how I can write this in a
generic manner.
next prev parent reply other threads:[~2015-02-02 22:15 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-08 0:06 [PATCH 0/6] APM X-Gene platform mailbox and proxy i2c driver Feng Kan
2014-10-08 0:06 ` [PATCH 1/6] mailbox: add support for APM X-Gene platform mailbox driver Feng Kan
2014-10-08 0:06 ` [PATCH 2/6] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation Feng Kan
2014-10-08 9:50 ` Mark Rutland
2014-10-08 0:06 ` [PATCH 3/6] arm64: dts: mailbox device tree node for APM X-Gene platform Feng Kan
2014-10-08 0:06 ` [PATCH 4/6] i2c: busses: add SLIMpro I2C device driver on " Feng Kan
2014-11-11 20:32 ` Wolfram Sang
2014-11-17 23:39 ` Feng Kan
2015-01-09 18:52 ` Feng Kan
2015-01-09 20:42 ` Wolfram Sang
2014-11-11 21:51 ` Arnd Bergmann
2015-01-09 18:56 ` Feng Kan
2015-01-09 19:42 ` Arnd Bergmann
2015-01-30 1:07 ` Feng Kan
2015-01-30 6:11 ` Wolfram Sang
2015-02-02 22:15 ` Feng Kan [this message]
2015-02-02 23:16 ` Wolfram Sang
2014-10-08 0:06 ` [PATCH 5/6] Documentation: i2c: Add APM X-Gene platform SLIMpro I2C driver documentation Feng Kan
2014-10-08 10:11 ` Mark Rutland
2014-11-11 21:40 ` Arnd Bergmann
2014-10-08 0:06 ` [PATCH 6/6] arm64: dts: add proxy I2C device driver on APM X-Gene platform Feng Kan
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