From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [PATCH 1/3] TTY: add support for "tty slave" devices. Date: Sun, 28 Dec 2014 15:20:10 +0100 Message-ID: <20141228142010.GA3922@amd> References: <20141211214801.4127.93914.stgit@notabene.brown> <20141211215943.4127.24792.stgit@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20141211215943.4127.24792.stgit@notabene.brown> Sender: linux-kernel-owner@vger.kernel.org To: NeilBrown Cc: Grant Likely , Greg Kroah-Hartman , Mark Rutland , Jiri Slaby , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org Hi! > index 8c4fd0332028..b59501ee2f21 100644 > --- a/Documentation/devicetree/bindings/serial/of-serial.txt > +++ b/Documentation/devicetree/bindings/serial/of-serial.txt > @@ -39,6 +39,10 @@ Optional properties: > driver is allowed to detect support for the capability even without this > property. > > +Optional child node: > +- a platform device listed as a child node will be probed and > + powered-on whenever the tty is in use (open). > + > Example: > > uart@80230000 { Hmm. Other devices may want it the other way around: probe the device behind the uart, make it control power and open/close of the uart, and hide the /dev/ttyXX from userspace... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html