Date: Sun, 28 Dec 2014 15:20:10 +0100
From: Pavel Machek <pavel@ucw.cz>
To: NeilBrown <neilb@suse.de>
Cc: Grant Likely <grant.likely@linaro.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Mark Rutland <mark.rutland@arm.com>, Jiri Slaby <jslaby@suse.cz>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] TTY: add support for "tty slave" devices.
Message-ID: <20141228142010.GA3922@amd>
References: <20141211214801.4127.93914.stgit@notabene.brown>
 <20141211215943.4127.24792.stgit@notabene.brown>
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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
								
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