mirror of https://gitee.com/openkylin/linux.git
55 lines
2.1 KiB
Plaintext
55 lines
2.1 KiB
Plaintext
|
EDT ft5x06 based Polytouch devices
|
||
|
|
----------------------------------
|
||
|
|
|
||
|
|
The edt-ft5x06 driver is useful for the EDT "Polytouch" family of capacitive
|
||
|
|
touch screens. Note that it is *not* suitable for other devices based on the
|
||
|
|
focaltec ft5x06 devices, since they contain vendor-specific firmware. In
|
||
|
|
particular this driver is not suitable for the Nook tablet.
|
||
|
|
|
||
|
|
It has been tested with the following devices:
|
||
|
|
* EP0350M06
|
||
|
|
* EP0430M06
|
||
|
|
* EP0570M06
|
||
|
|
* EP0700M06
|
||
|
|
|
||
|
|
The driver allows configuration of the touch screen via a set of sysfs files:
|
||
|
|
|
||
|
|
/sys/class/input/eventX/device/device/threshold:
|
||
|
|
allows setting the "click"-threshold in the range from 20 to 80.
|
||
|
|
|
||
|
|
/sys/class/input/eventX/device/device/gain:
|
||
|
|
allows setting the sensitivity in the range from 0 to 31. Note that
|
||
|
|
lower values indicate higher sensitivity.
|
||
|
|
|
||
|
|
/sys/class/input/eventX/device/device/offset:
|
||
|
|
allows setting the edge compensation in the range from 0 to 31.
|
||
|
|
|
||
|
|
/sys/class/input/eventX/device/device/report_rate:
|
||
|
|
allows setting the report rate in the range from 3 to 14.
|
||
|
|
|
||
|
|
|
||
|
|
For debugging purposes the driver provides a few files in the debug
|
||
|
|
filesystem (if available in the kernel). In /sys/kernel/debug/edt_ft5x06
|
||
|
|
you'll find the following files:
|
||
|
|
|
||
|
|
num_x, num_y:
|
||
|
|
(readonly) contains the number of sensor fields in X- and
|
||
|
|
Y-direction.
|
||
|
|
|
||
|
|
mode:
|
||
|
|
allows switching the sensor between "factory mode" and "operation
|
||
|
|
mode" by writing "1" or "0" to it. In factory mode (1) it is
|
||
|
|
possible to get the raw data from the sensor. Note that in factory
|
||
|
|
mode regular events don't get delivered and the options described
|
||
|
|
above are unavailable.
|
||
|
|
|
||
|
|
raw_data:
|
||
|
|
contains num_x * num_y big endian 16 bit values describing the raw
|
||
|
|
values for each sensor field. Note that each read() call on this
|
||
|
|
files triggers a new readout. It is recommended to provide a buffer
|
||
|
|
big enough to contain num_x * num_y * 2 bytes.
|
||
|
|
|
||
|
|
Note that reading raw_data gives a I/O error when the device is not in factory
|
||
|
|
mode. The same happens when reading/writing to the parameter files when the
|
||
|
|
device is not in regular operation mode.
|