From: Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>
To: "Lothar Waßmann" <LW-AvR2QvxeiV7DiMYJYoSAnRvVK+yQ3ZXh@public.gmane.org>
Cc: Yao Yuan <yao.yuan-KZfg59tc24xl57MIdRCFDg@public.gmane.org>,
"mark.rutland-5wv7dgnIgG8@public.gmane.org"
<mark.rutland-5wv7dgnIgG8@public.gmane.org>,
"wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org"
<wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org"
<shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH 1/3] i2c: add DMA support for freescale i2c driver
Date: Fri, 28 Feb 2014 13:00:30 +0100 [thread overview]
Message-ID: <201402281300.30907.marex@denx.de> (raw)
In-Reply-To: <20140228115925.5fe07693-VjFSrY7JcPWvSplVBqRQBQ@public.gmane.org>
On Friday, February 28, 2014 at 11:59:25 AM, Lothar Waßmann wrote:
> Hi,
>
> Marek Vasut wrote:
> > On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
> >
> > [...]
> >
> > > Yes, here have two dma channels, one for RX and the other one for TX.
> > > When we request the channel we should determine it for TX or RX.
> >
> > Sorry, I don't quite understand this. If you have two DMA channels, can
> > you not use them both to do full-duplex SPI transfer ?
>
> SPI != I2C
You got me, sorry.
Best regards,
Marek Vasut
WARNING: multiple messages have this Message-ID (diff)
From: marex@denx.de (Marek Vasut)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/3] i2c: add DMA support for freescale i2c driver
Date: Fri, 28 Feb 2014 13:00:30 +0100 [thread overview]
Message-ID: <201402281300.30907.marex@denx.de> (raw)
In-Reply-To: <20140228115925.5fe07693@ipc1.ka-ro>
On Friday, February 28, 2014 at 11:59:25 AM, Lothar Wa?mann wrote:
> Hi,
>
> Marek Vasut wrote:
> > On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
> >
> > [...]
> >
> > > Yes, here have two dma channels, one for RX and the other one for TX.
> > > When we request the channel we should determine it for TX or RX.
> >
> > Sorry, I don't quite understand this. If you have two DMA channels, can
> > you not use them both to do full-duplex SPI transfer ?
>
> SPI != I2C
You got me, sorry.
Best regards,
Marek Vasut
WARNING: multiple messages have this Message-ID (diff)
From: Marek Vasut <marex@denx.de>
To: "Lothar Waßmann" <LW@karo-electronics.de>
Cc: Yao Yuan <yao.yuan@freescale.com>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"wsa@the-dreams.de" <wsa@the-dreams.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-i2c@vger.kernel.org" <linux-i2c@vger.kernel.org>,
"shawn.guo@linaro.org" <shawn.guo@linaro.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 1/3] i2c: add DMA support for freescale i2c driver
Date: Fri, 28 Feb 2014 13:00:30 +0100 [thread overview]
Message-ID: <201402281300.30907.marex@denx.de> (raw)
In-Reply-To: <20140228115925.5fe07693@ipc1.ka-ro>
On Friday, February 28, 2014 at 11:59:25 AM, Lothar Waßmann wrote:
> Hi,
>
> Marek Vasut wrote:
> > On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote:
> >
> > [...]
> >
> > > Yes, here have two dma channels, one for RX and the other one for TX.
> > > When we request the channel we should determine it for TX or RX.
> >
> > Sorry, I don't quite understand this. If you have two DMA channels, can
> > you not use them both to do full-duplex SPI transfer ?
>
> SPI != I2C
You got me, sorry.
Best regards,
Marek Vasut
next prev parent reply other threads:[~2014-02-28 12:00 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-27 6:05 [PATCH 0/3] i2c: add DMA support for freescale i2c driver Yuan Yao
2014-02-27 6:05 ` Yuan Yao
2014-02-27 6:05 ` Yuan Yao
[not found] ` <1393481115-22136-1-git-send-email-yao.yuan-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2014-02-27 6:05 ` [PATCH 1/3] " Yuan Yao
2014-02-27 6:05 ` Yuan Yao
2014-02-27 6:05 ` Yuan Yao
[not found] ` <1393481115-22136-2-git-send-email-yao.yuan-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2014-02-27 12:55 ` Shawn Guo
2014-02-27 12:55 ` Shawn Guo
2014-02-27 12:55 ` Shawn Guo
2014-02-27 13:21 ` Shawn Guo
2014-02-27 13:21 ` Shawn Guo
2014-02-27 13:21 ` Shawn Guo
2014-02-27 20:39 ` Marek Vasut
2014-02-27 20:39 ` Marek Vasut
2014-02-27 20:39 ` Marek Vasut
2014-02-28 2:13 ` Shawn Guo
2014-02-28 2:13 ` Shawn Guo
2014-02-28 2:13 ` Shawn Guo
[not found] ` <20140228021300.GJ13537-rvtDTF3kK1ictlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org>
2014-02-28 2:23 ` Shawn Guo
2014-02-28 2:23 ` Shawn Guo
2014-02-28 2:23 ` Shawn Guo
2014-02-28 8:57 ` Marek Vasut
2014-02-28 8:57 ` Marek Vasut
2014-02-28 5:19 ` Yao Yuan
2014-02-28 5:19 ` Yao Yuan
2014-02-28 5:19 ` Yao Yuan
[not found] ` <3f58a8abdda74100b4f7b14d0c31c90e-AZ66ij2kwaZYLYlmg7qx2OO6mTEJWrR4XA4E9RH9d+qIuWR1G4zioA@public.gmane.org>
2014-02-28 9:04 ` Marek Vasut
2014-02-28 9:04 ` Marek Vasut
2014-02-28 9:04 ` Marek Vasut
[not found] ` <201402281004.10238.marex-ynQEQJNshbs@public.gmane.org>
2014-02-28 10:59 ` Lothar Waßmann
2014-02-28 10:59 ` Lothar Waßmann
2014-02-28 10:59 ` Lothar Waßmann
[not found] ` <20140228115925.5fe07693-VjFSrY7JcPWvSplVBqRQBQ@public.gmane.org>
2014-02-28 12:00 ` Marek Vasut [this message]
2014-02-28 12:00 ` Marek Vasut
2014-02-28 12:00 ` Marek Vasut
2014-02-28 11:36 ` Yao Yuan
2014-02-28 11:36 ` Yao Yuan
2014-02-28 11:36 ` Yao Yuan
2014-02-28 12:03 ` Marek Vasut
2014-02-28 12:03 ` Marek Vasut
2014-03-03 10:23 ` Yao Yuan
2014-03-03 10:23 ` Yao Yuan
2014-03-03 10:23 ` Yao Yuan
[not found] ` <3bbad0af0bc74f04bc386b141dadedb3-AZ66ij2kwaZYLYlmg7qx2OO6mTEJWrR4XA4E9RH9d+qIuWR1G4zioA@public.gmane.org>
2014-03-03 11:14 ` Marek Vasut
2014-03-03 11:14 ` Marek Vasut
2014-03-03 11:14 ` Marek Vasut
2014-02-27 6:05 ` [PATCH 3/3] Documentation:add " Yuan Yao
2014-02-27 6:05 ` Yuan Yao
2014-02-27 6:05 ` Yuan Yao
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