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1FocalTech EDT-FT5x06 Polytouch driver
2=====================================
3
4There are 5 variants of the chip for various touch panel sizes
5FT5206GE1 2.8" .. 3.8"
6FT5306DE4 4.3" .. 7"
7FT5406EE8 7" .. 8.9"
8FT5506EEG 7" .. 8.9"
9FT5726NEI 5.7” .. 11.6"
10
11The software interface is identical for all those chips, so that
12currently there is no need for the driver to distinguish between the
13different chips. Nevertheless distinct compatible strings are used so
14that a distinction can be added if necessary without changing the DT
15bindings.
16
17
18Required properties:
19 - compatible: "edt,edt-ft5206"
20 or: "edt,edt-ft5306"
21 or: "edt,edt-ft5406"
22 or: "edt,edt-ft5506"
23 or: "evervision,ev-ft5726"
24 or: "focaltech,ft6236"
25
26 - reg: I2C slave address of the chip (0x38)
27 - interrupts: interrupt specification for the touchdetect
28 interrupt
29
30Optional properties:
31 - reset-gpios: GPIO specification for the RESET input
32 - wake-gpios: GPIO specification for the WAKE input
33 - vcc-supply: Regulator that supplies the touchscreen
34
35 - pinctrl-names: should be "default"
36 - pinctrl-0: a phandle pointing to the pin settings for the
37 control gpios
38
39 - wakeup-source: If present the device will act as wakeup-source
40
41 - threshold: allows setting the "click"-threshold in the range
42 from 0 to 80.
43
44 - gain: allows setting the sensitivity in the range from 0 to
45 31. Note that lower values indicate higher
46 sensitivity.
47
48 - offset: allows setting the edge compensation in the range from
49 0 to 31.
50
51 - offset-x: Same as offset, but applies only to the horizontal position.
52 Range from 0 to 80, only supported by evervision,ev-ft5726
53 devices.
54
55 - offset-y: Same as offset, but applies only to the vertical position.
56 Range from 0 to 80, only supported by evervision,ev-ft5726
57 devices.
58
59 - touchscreen-size-x : See touchscreen.txt
60 - touchscreen-size-y : See touchscreen.txt
61 - touchscreen-fuzz-x : See touchscreen.txt
62 - touchscreen-fuzz-y : See touchscreen.txt
63 - touchscreen-inverted-x : See touchscreen.txt
64 - touchscreen-inverted-y : See touchscreen.txt
65 - touchscreen-swapped-x-y : See touchscreen.txt
66
67Example:
68 polytouch: edt-ft5x06@38 {
69 compatible = "edt,edt-ft5406", "edt,edt-ft5x06";
70 reg = <0x38>;
71 pinctrl-names = "default";
72 pinctrl-0 = <&edt_ft5x06_pins>;
73 interrupt-parent = <&gpio2>;
74 interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
75 reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
76 wake-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>;
77 };