From: Rodolfo Giometti <giometti@enneenne.com>
To: Paul Chavent <Paul.Chavent@onera.fr>
Cc: linux-usb@vger.kernel.org, gregkh@linuxfoundation.org,
jhovold@gmail.com, fschaefer.oss@googlemail.com, jslaby@suse.cz,
max@suse.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/5] Enable PPS reporting for USB serial devices
Date: Tue, 10 Sep 2013 09:31:05 +0200 [thread overview]
Message-ID: <20130910073105.GB5030@enneenne.com> (raw)
In-Reply-To: <1378742480-2146-1-git-send-email-paul.chavent@onera.fr>
On Mon, Sep 09, 2013 at 06:01:15PM +0200, Paul Chavent wrote:
> Hi.
>
> This series enable the PPS reporting for USB serial devices.
I have nothing against with this solution but consider that reporting
a PPS signal through USB bus may add unknown delays that may vanish
clock stability... as far as I know you should not use USB serial port
with PPS. Have you some statistics about clock stability in a real
implementation?
Ciao,
Rodolfo
--
GNU/Linux Solutions e-mail: giometti@enneenne.com
Linux Device Driver giometti@linux.it
Embedded Systems phone: +39 349 2432127
UNIX programming skype: rodolfo.giometti
Freelance ICT Italia - Consulente ICT Italia - www.consulenti-ict.it
next prev parent reply other threads:[~2013-09-10 7:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-09 16:01 [PATCH 0/5] Enable PPS reporting for USB serial devices Paul Chavent
2013-09-09 16:01 ` [PATCH 1/5] USB : serial : remove tty arg of handle_dcd_change Paul Chavent
2013-09-09 17:45 ` Johan Hovold
2013-09-09 17:48 ` Johan Hovold
2013-09-10 8:09 ` Paul Chavent
2013-09-09 16:01 ` [PATCH 2/5] USB : serial : get protected tty in handle_dcd_change Paul Chavent
2013-09-09 18:03 ` Sergei Shtylyov
2013-09-09 16:01 ` [PATCH 3/5] USB : serial : call handle_dcd_change in ftdi driver Paul Chavent
2013-09-09 16:01 ` [PATCH 4/5] USB : serial : invoke dcd_change ldisc's handler Paul Chavent
2013-09-09 16:36 ` Greg KH
2013-09-09 16:01 ` [PATCH 5/5] USB : serial : pl2303 wake up after dcd status check Paul Chavent
2013-09-10 7:31 ` Rodolfo Giometti [this message]
2013-09-10 8:00 ` [PATCH 0/5] Enable PPS reporting for USB serial devices Paul Chavent
2013-09-10 20:02 ` Gary E. Miller
2013-09-12 7:53 ` Rodolfo Giometti
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