1FocalTech EDT-FT5x06 Polytouch driver
2=====================================
3
4There are 3 variants of the chip for various touch panel sizes
5FT5206GE1  2.8" .. 3.8"
6FT5306DE4  4.3" .. 7"
7FT5406EE8  7"   .. 8.9"
8
9The software interface is identical for all those chips, so that
10currently there is no need for the driver to distinguish between the
11different chips. Nevertheless distinct compatible strings are used so
12that a distinction can be added if necessary without changing the DT
13bindings.
14
15
16Required properties:
17 - compatible:  "edt,edt-ft5206"
18           or:  "edt,edt-ft5306"
19           or:  "edt,edt-ft5406"
20
21 - reg:         I2C slave address of the chip (0x38)
22 - interrupt-parent: a phandle pointing to the interrupt controller
23                     serving the interrupt for this chip
24 - interrupts:       interrupt specification for the touchdetect
25                     interrupt
26
27Optional properties:
28 - reset-gpios: GPIO specification for the RESET input
29 - wake-gpios:  GPIO specification for the WAKE input
30
31 - pinctrl-names: should be "default"
32 - pinctrl-0:   a phandle pointing to the pin settings for the
33                control gpios
34
35 - threshold:   allows setting the "click"-threshold in the range
36                from 20 to 80.
37
38 - gain:        allows setting the sensitivity in the range from 0 to
39                31. Note that lower values indicate higher
40                sensitivity.
41
42 - offset:      allows setting the edge compensation in the range from
43                0 to 31.
44
45Example:
46	polytouch: edt-ft5x06@38 {
47		compatible = "edt,edt-ft5406", "edt,edt-ft5x06";
48		reg = <0x38>;
49		pinctrl-names = "default";
50		pinctrl-0 = <&edt_ft5x06_pins>;
51		interrupt-parent = <&gpio2>;
52		interrupts = <5 0>;
53		reset-gpios = <&gpio2 6 1>;
54		wake-gpios = <&gpio4 9 0>;
55	};
56