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HID: ntrig: document sysfs interface

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

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Aishwarya Pant 2018-03-02 11:00:17 +05:30 committed by Jiri Kosina
parent 09f3fe40f5
commit b55dc1dc27
1 changed files with 70 additions and 0 deletions
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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.