Re: [PATCH 1/3] TTY: add support for "tty slave" devices.
From: Pavel Machek <hidden>
Date: 2014-12-28 14:20:20
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Hi!
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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