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Date:	Sun, 28 Dec 2014 15:20:10 +0100
From:	Pavel Machek <>
To:	NeilBrown <>
Cc:	Grant Likely <>,
	Greg Kroah-Hartman <>,
	Mark Rutland <>,
	Jiri Slaby <>,,
Subject: Re: [PATCH 1/3] TTY: add support for "tty slave" devices.


> 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@...30000 {

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...
(cesky, pictures)
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