From: Pavel Machek <pavel@ucw.cz>
To: "Pali Rohár" <pali.rohar@gmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Sebastian Reichel <sre@kernel.org>,
kernel list <linux-kernel@vger.kernel.org>,
linux-input@vger.kernel.org, Henrik Rydberg <rydberg@euromail.se>
Subject: Re: Disable input device
Date: Sat, 6 Dec 2014 13:47:08 +0100 [thread overview]
Message-ID: <20141206124708.GA17289@amd> (raw)
In-Reply-To: <201411291824.03996@pali>
On Sat 2014-11-29 18:24:03, Pali Rohár wrote:
> Hello,
>
> there is request to introduce some option (via sysfs) to disable
> one input device. Originally it was for tsc2005 touchscreen found
> on Nokia N900 cellphone. Use case is to completely disable
> touchscreen when phone is in pocket or when screen is locked via
> slide switch (to prevent random clicks).
>
> But it would be better to have disable option for all input
> devices. Sometimes input device is not use and only consume
> power. Another case is when input device (e.g. keyboard or
> touchpad) is integrated into machine (e.g. on laptops) and user
> does not want to use it (so make sure that kernel does not send
> events to userspace).
>
> I would like to ask, how to solve it?
>
> What do you think about adding new sysfs file "disable" (accept
> values 1 or 0) for every input device? With "1" it cause that
> kernel will drop all events from specific input device and if
> driver provide some function is can be called (e.g. for power
> management or disabling device at hardware level).
That makes sense to me. Dmitry, would such interface be acceptable?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@ucw.cz>
To: "Pali Rohár" <pali.rohar@gmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Sebastian Reichel <sre@kernel.org>,
kernel list <linux-kernel@vger.kernel.org>,
linux-input@vger.kernel.org, Henrik Rydberg <rydberg@euromail.se>
Subject: Re: Disable input device
Date: Sat, 6 Dec 2014 13:47:08 +0100 [thread overview]
Message-ID: <20141206124708.GA17289@amd> (raw)
In-Reply-To: <201411291824.03996@pali>
On Sat 2014-11-29 18:24:03, Pali Rohár wrote:
> Hello,
>
> there is request to introduce some option (via sysfs) to disable
> one input device. Originally it was for tsc2005 touchscreen found
> on Nokia N900 cellphone. Use case is to completely disable
> touchscreen when phone is in pocket or when screen is locked via
> slide switch (to prevent random clicks).
>
> But it would be better to have disable option for all input
> devices. Sometimes input device is not use and only consume
> power. Another case is when input device (e.g. keyboard or
> touchpad) is integrated into machine (e.g. on laptops) and user
> does not want to use it (so make sure that kernel does not send
> events to userspace).
>
> I would like to ask, how to solve it?
>
> What do you think about adding new sysfs file "disable" (accept
> values 1 or 0) for every input device? With "1" it cause that
> kernel will drop all events from specific input device and if
> driver provide some function is can be called (e.g. for power
> management or disabling device at hardware level).
That makes sense to me. Dmitry, would such interface be acceptable?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2014-12-06 12:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-29 17:24 Disable input device Pali Rohár
2014-12-06 12:47 ` Pavel Machek [this message]
2014-12-06 12:47 ` Pavel Machek
2014-12-06 15:28 ` Chuck Ebbert
2014-12-06 15:28 ` Chuck Ebbert
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