From: Hans Beckerus <hans.beckerus@gmail.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Alexander Shiyan <shc_work@mail.ru>, linux-serial@vger.kernel.org
Subject: Re: USB serial support / Prolific PL2303 Driver
Date: Mon, 08 Apr 2013 19:35:49 +0200 [thread overview]
Message-ID: <5162FFF5.6040403@gmail.com> (raw)
In-Reply-To: <20130408162945.GA26133@kroah.com>
On 2013-04-08 6:29, Greg KH wrote:
> On Mon, Apr 08, 2013 at 06:20:23PM +0200, Hans Beckérus wrote:
>> Sure, dmesg will show me the details, but I would really like to have
>> it in real-time ;) Actually when I set console=ttyUSB0,115200 all I
>> get is the prompt :( Nothing comes out from the boot, and it does not
>> seem to act as a real console either since any thing that usually pops
>> up there are only showing in dmesg now. Do I need to configure the
>> kernel in some specific way to support USB console mode?
> You do have:
> CONFIG_USB_SERIAL_CONSOLE
> enabled, right?
Hmm. Coming to think about it, no ;)
Will try it first thing tomorrow! Thanks.
> USB starts as one of the last things in the kernel boot process, so the
> best you can ever get is a summary of what happened during the boot, not
> the kernel boot messages as they happen because they happen before the
> USB device is initialized.
Sure. That is an acceptable limitation. However, I wonder if this will
be different once we get U-Boot USB console support on this platform?
Question though is if Linux ever will be able to benefit from a first
stage driver already being kicked-off by U-Boot.
Hans
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next prev parent reply other threads:[~2013-04-08 17:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-08 13:37 USB serial support / Prolific PL2303 Driver Hans Beckérus
2013-04-08 15:03 ` Greg KH
2013-04-08 15:06 ` Re[2]: " Alexander Shiyan
2013-04-08 15:57 ` Hans Beckérus
2013-04-08 16:03 ` Greg KH
2013-04-08 16:20 ` Hans Beckérus
2013-04-08 16:29 ` Greg KH
2013-04-08 17:35 ` Hans Beckerus [this message]
2013-04-08 18:19 ` Greg KH
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