1b08c118cSDmitry TorokhovEDT ft5x06 based Polytouch devices 2b08c118cSDmitry Torokhov---------------------------------- 3b08c118cSDmitry Torokhov 4b08c118cSDmitry TorokhovThe edt-ft5x06 driver is useful for the EDT "Polytouch" family of capacitive 5b08c118cSDmitry Torokhovtouch screens. Note that it is *not* suitable for other devices based on the 6b08c118cSDmitry Torokhovfocaltec ft5x06 devices, since they contain vendor-specific firmware. In 7b08c118cSDmitry Torokhovparticular this driver is not suitable for the Nook tablet. 8b08c118cSDmitry Torokhov 9b08c118cSDmitry TorokhovIt has been tested with the following devices: 10b08c118cSDmitry Torokhov * EP0350M06 11b08c118cSDmitry Torokhov * EP0430M06 12b08c118cSDmitry Torokhov * EP0570M06 13b08c118cSDmitry Torokhov * EP0700M06 14b08c118cSDmitry Torokhov 15b08c118cSDmitry TorokhovThe driver allows configuration of the touch screen via a set of sysfs files: 16b08c118cSDmitry Torokhov 17b08c118cSDmitry Torokhov/sys/class/input/eventX/device/device/threshold: 18*aa3d4409SMartin Kepplinger allows setting the "click"-threshold in the range from 0 to 80. 19b08c118cSDmitry Torokhov 20b08c118cSDmitry Torokhov/sys/class/input/eventX/device/device/gain: 21b08c118cSDmitry Torokhov allows setting the sensitivity in the range from 0 to 31. Note that 22b08c118cSDmitry Torokhov lower values indicate higher sensitivity. 23b08c118cSDmitry Torokhov 24b08c118cSDmitry Torokhov/sys/class/input/eventX/device/device/offset: 25b08c118cSDmitry Torokhov allows setting the edge compensation in the range from 0 to 31. 26b08c118cSDmitry Torokhov 27b08c118cSDmitry Torokhov/sys/class/input/eventX/device/device/report_rate: 28b08c118cSDmitry Torokhov allows setting the report rate in the range from 3 to 14. 29b08c118cSDmitry Torokhov 30b08c118cSDmitry Torokhov 31b08c118cSDmitry TorokhovFor debugging purposes the driver provides a few files in the debug 32b08c118cSDmitry Torokhovfilesystem (if available in the kernel). In /sys/kernel/debug/edt_ft5x06 33b08c118cSDmitry Torokhovyou'll find the following files: 34b08c118cSDmitry Torokhov 35b08c118cSDmitry Torokhovnum_x, num_y: 36b08c118cSDmitry Torokhov (readonly) contains the number of sensor fields in X- and 37b08c118cSDmitry Torokhov Y-direction. 38b08c118cSDmitry Torokhov 39b08c118cSDmitry Torokhovmode: 40b08c118cSDmitry Torokhov allows switching the sensor between "factory mode" and "operation 41b08c118cSDmitry Torokhov mode" by writing "1" or "0" to it. In factory mode (1) it is 42b08c118cSDmitry Torokhov possible to get the raw data from the sensor. Note that in factory 43b08c118cSDmitry Torokhov mode regular events don't get delivered and the options described 44b08c118cSDmitry Torokhov above are unavailable. 45b08c118cSDmitry Torokhov 46b08c118cSDmitry Torokhovraw_data: 47b08c118cSDmitry Torokhov contains num_x * num_y big endian 16 bit values describing the raw 48b08c118cSDmitry Torokhov values for each sensor field. Note that each read() call on this 49b08c118cSDmitry Torokhov files triggers a new readout. It is recommended to provide a buffer 50b08c118cSDmitry Torokhov big enough to contain num_x * num_y * 2 bytes. 51b08c118cSDmitry Torokhov 52b08c118cSDmitry TorokhovNote that reading raw_data gives a I/O error when the device is not in factory 53b08c118cSDmitry Torokhovmode. The same happens when reading/writing to the parameter files when the 54b08c118cSDmitry Torokhovdevice is not in regular operation mode. 55