From: Lauri Hintsala <lauri.hintsala@bluegiga.com>
To: Wolfram Sang <w.sang@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
linux-serial@vger.kernel.org
Subject: Re: mxs-auart serial driver DMA support?
Date: Thu, 12 Jan 2012 12:28:11 +0200 [thread overview]
Message-ID: <4F0EB5BB.1060008@bluegiga.com> (raw)
In-Reply-To: <20120112094244.GA2775@pengutronix.de>
On 01/12/2012 11:42 AM, Wolfram Sang wrote:
>
>> Any plans to add DMA support for mxs-auart serial driver? I noticed
>> it is impossible to archive full 3.25 Mbs speed with current one.
>
> No plans from our side, currently.
OK, AUART works fine with 115200 bps but over that it loose data
randomly. I have seen fifo overrun errors during receiving data with
1Mbs and over. So current driver is unuseful with higher baud rates.
Regards,
Lauri
WARNING: multiple messages have this Message-ID (diff)
From: lauri.hintsala@bluegiga.com (Lauri Hintsala)
To: linux-arm-kernel@lists.infradead.org
Subject: mxs-auart serial driver DMA support?
Date: Thu, 12 Jan 2012 12:28:11 +0200 [thread overview]
Message-ID: <4F0EB5BB.1060008@bluegiga.com> (raw)
In-Reply-To: <20120112094244.GA2775@pengutronix.de>
On 01/12/2012 11:42 AM, Wolfram Sang wrote:
>
>> Any plans to add DMA support for mxs-auart serial driver? I noticed
>> it is impossible to archive full 3.25 Mbs speed with current one.
>
> No plans from our side, currently.
OK, AUART works fine with 115200 bps but over that it loose data
randomly. I have seen fifo overrun errors during receiving data with
1Mbs and over. So current driver is unuseful with higher baud rates.
Regards,
Lauri
next prev parent reply other threads:[~2012-01-12 10:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-12 6:33 mxs-auart serial driver DMA support? Lauri Hintsala
2012-01-12 6:33 ` Lauri Hintsala
2012-01-12 9:42 ` Wolfram Sang
2012-01-12 9:42 ` Wolfram Sang
2012-01-12 10:28 ` Lauri Hintsala [this message]
2012-01-12 10:28 ` Lauri Hintsala
2012-01-12 11:00 ` Wolfram Sang
2012-01-12 11:00 ` Wolfram Sang
-- strict thread matches above, loose matches on Subject: below --
2012-01-12 6:30 Lauri Hintsala
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