linux-kernel - Re: serial/pch_uart: AT command behavior

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Message-ID: <20110720134909.13a4a838@lxorguk.ukuu.org.uk>
Date:	Wed, 20 Jul 2011 13:49:09 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Tomoya MORINAGA <tomoya-linux@....okisemi.com>
Cc:	Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexander Stein <alexander.stein@...tec-electronic.com>,
	"toshiharu-linux@....okisemi.com" <toshiharu-linux@....okisemi.com>,
	"Ewe, Kok Howg" <kok.howg.ewe@...el.com>,
	"Wang, Qi" <qi.wang@...el.com>,
	"Wang, Yong Y" <yong.y.wang@...el.com>,
	"Clark, Joel" <joel.clark@...el.com>
Subject: Re: serial/pch_uart: AT command behavior

On Wed, 20 Jul 2011 09:14:42 +0900
Tomoya MORINAGA <tomoya-linux@....okisemi.com> wrote:

> (2011/07/19 18:06), Alan Cox wrote:
> > On Tue, 19 Jul 2011 13:15:57 +0900
> > Tomoya MORINAGA<tomoya-linux@....okisemi.com>  wrote:
> >
> >> Hi,
> >>
> >> I have a question for UART driver AT command behavior.
> >> When installing pch_uart, AT command "AT+GCAP^M" are sent for 4 times.
> >> This command is sent first install only.
> >> (After the above, removing pch_uart and installing pch_uart again,
> >> this command is not sent.)
> >>
> >> Let me know the behavior is normal or not ?
> >
> > As your distribution, it isn't the kernel.
> >
> Thank you for your information.
> The above behavior looks Fedora's.
> In fact,I confirmed MeeGo doesn't send any AT command message.

AT+GCAP is apparently 'serial plug and play' so I assume this is part of
the Fedora autodetection/udev logic.
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