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Commit b55dc1dc authored by Aishwarya Pant's avatar Aishwarya Pant Committed by Jiri Kosina
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HID: ntrig: document sysfs interface 



Add sysfs documentation for N-Trig touchscreens under Documentation/ABI.
Descriptions have been collected from code comments.

Signed-off-by: default avatarAishwarya Pant <aishpant@gmail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 09f3fe40

Documentation/ABI/testing/sysfs-driver-hid-ntrig

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What:		/sys/bus/hid/drivers/ntrig/<dev>/activate_slack

Date:		May, 2010

KernelVersion:	2.6.35

Contact:	linux-input@vger.kernel.org

Description:

		(RW) Number of contact frames ignored before acknowledging the

		start of activity (activating touch).





What:		/sys/bus/hid/drivers/ntrig/<dev>/decativate_slack

Date:		May, 2010

KernelVersion:	2.6.35

Contact:	linux-input@vger.kernel.org

Description:

		(RW) Number of empty (no contact) frames ignored before

		acknowledging the end of activity (deactivating touch).



		When the last finger is removed from the device, it sends a

		number of empty frames. By holding off on deactivation for a few

		frames false erroneous disconnects can be tolerated, where the

		sensor may mistakenly not detect a finger that is still present.





What:		/sys/bus/hid/drivers/ntrig/<dev>/activation_width

What:		/sys/bus/hid/drivers/ntrig/<dev>/activation_height

Date:		May, 2010

KernelVersion:	2.6.35

Contact:	linux-input@vger.kernel.org

Description:

		Threholds to override activation slack.



		activation_width:	(RW) Width threshold to immediately

					start processing touch events.



		activation_height:	(RW) Height threshold to immediately

					start processing touch events.





What:		/sys/bus/hid/drivers/ntrig/<dev>/min_width

What:		/sys/bus/hid/drivers/ntrig/<dev>/min_height

Date:		May, 2010

KernelVersion:	2.6.35

Contact:	linux-input@vger.kernel.org

Description:

		Minimum size contact accepted.



		min_width:	(RW) Minimum touch contact width to decide

				activation and activity.



		min_height:	(RW) Minimum touch contact height to decide

				activation and activity.





What:		/sys/bus/hid/drivers/ntrig/<dev>/sensor_physical_width

What:		/sys/bus/hid/drivers/ntrig/<dev>/sensor_physical_height

Date:		May, 2010

KernelVersion:	2.6.35

Contact:	linux-input@vger.kernel.org

Description:

		(RO) These are internal ranges not used for normal events but

		useful for tuning.





What:		/sys/bus/hid/drivers/ntrig/<dev>/sensor_logical_width

What:		/sys/bus/hid/drivers/ntrig/<dev>/sensor_logical_height

Date:		May, 2010

KernelVersion:	2.6.35

Contact:	linux-input@vger.kernel.org

Description:

		(RO) The range for positions reported during activity.