From: Pali =?utf-8?q?Roh=C3=A1r?= <pali.rohar@gmail.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Sebastian Reichel <sre@kernel.org>, Pavel Machek <pavel@ucw.cz>,
        kernel list <linux-kernel@vger.kernel.org>,
        linux-input@vger.kernel.org, Henrik Rydberg <rydberg@euromail.se>
Subject: Disable input device
Date: Sat, 29 Nov 2014 18:24:03 +0100
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Hello,

there is request to introduce some option (via sysfs) to disable=20
one input device. Originally it was for tsc2005 touchscreen found=20
on Nokia N900 cellphone. Use case is to completely disable=20
touchscreen when phone is in pocket or when screen is locked via=20
slide switch (to prevent random clicks).

But it would be better to have disable option for all input=20
devices. Sometimes input device is not use and only consume=20
power. Another case is when input device (e.g. keyboard or=20
touchpad) is integrated into machine (e.g. on laptops) and user=20
does not want to use it (so make sure that kernel does not send=20
events to userspace).

I would like to ask, how to solve it?

What do you think about adding new sysfs file "disable" (accept=20
values 1 or 0) for every input device? With "1" it cause that=20
kernel will drop all events from specific input device and if=20
driver provide some function is can be called (e.g. for power=20
management or disabling device at hardware level).

Or do you prefer something other?

=2D-=20
Pali Roh=C3=A1r
pali.rohar@gmail.com

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