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author | Simon Budig <simon.budig@kernelconcepts.de> | 2012-07-24 23:29:36 -0700 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-24 23:55:03 -0700 |
commit | 43c4d13e901a8f37d9abbd410f093ebe885b5322 (patch) | |
tree | 80ba618fd4ec2a5e07ed25ed803446f42e19b038 /Documentation/input | |
parent | 07b8481d4aff73d6f451f25e74ea10240ff5131e (diff) | |
download | linux-3.10-43c4d13e901a8f37d9abbd410f093ebe885b5322.tar.gz linux-3.10-43c4d13e901a8f37d9abbd410f093ebe885b5322.tar.bz2 linux-3.10-43c4d13e901a8f37d9abbd410f093ebe885b5322.zip |
Input: add driver for FT5x06 based EDT displays
This is a driver for the EDT "Polytouch" family of touch controllers
based on the FocalTech FT5x06 line of chips.
Signed-off-by: Simon Budig <simon.budig@kernelconcepts.de>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/input')
-rw-r--r-- | Documentation/input/edt-ft5x06.txt | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/input/edt-ft5x06.txt b/Documentation/input/edt-ft5x06.txt new file mode 100644 index 00000000000..2032f0b7a8f --- /dev/null +++ b/Documentation/input/edt-ft5x06.txt @@ -0,0 +1,54 @@ +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. |