linux-kernel - Re: [PATCH] drivers/tty: Folding Android's keyreset driver in sysRQ

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Message-ID: <20120828115550.1b9c0293@pyramind.ukuu.org.uk>
Date:	Tue, 28 Aug 2012 11:55:50 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Randy Dunlap <rdunlap@...otime.net>
Cc:	mathieu.poirier@...aro.org, linux-kernel@...r.kernel.org,
	arve@...roid.com, kernel-team@...roid.com,
	dmitry.torokhov@...il.com, john.stultz@...aro.org
Subject: Re: [PATCH] drivers/tty: Folding Android's keyreset driver in sysRQ

> Please document what button/key combinations those are.

It's taken from the platform data. Most phone devices don't have a real
keyboard let alone an sysrq key so it's device specific button combos in
general that trigger things like power off.

> 
> > The first time the key-combo is detected a work function that syncs
> > the filesystems is scheduled and the kernel rebooted. If all the keys
> > are released and then pressed again, it calls panic. Reboot on panic
> > should be set for this to work.  A platform device that specify a
> > reset key-combo should be added to the board file to trigger the
> > feature.

And it is documented ... ^^^^^^^^^^^^^^^^^^^^^^^^^^


Alan
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