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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"
8FT5506EEG 7" .. 8.9"
9
10The software interface is identical for all those chips, so that
11currently there is no need for the driver to distinguish between the
12different chips. Nevertheless distinct compatible strings are used so
13that a distinction can be added if necessary without changing the DT
14bindings.
15
16
17Required properties:
18 - compatible: "edt,edt-ft5206"
19 or: "edt,edt-ft5306"
20 or: "edt,edt-ft5406"
21 or: "edt,edt-ft5506"
22 or: "focaltech,ft6236"
23
24 - reg: I2C slave address of the chip (0x38)
25 - interrupt-parent: a phandle pointing to the interrupt controller
26 serving the interrupt for this chip
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
34 - pinctrl-names: should be "default"
35 - pinctrl-0: a phandle pointing to the pin settings for the
36 control gpios
37
38 - threshold: allows setting the "click"-threshold in the range
39 from 0 to 80.
40
41 - gain: allows setting the sensitivity in the range from 0 to
42 31. Note that lower values indicate higher
43 sensitivity.
44
45 - offset: allows setting the edge compensation in the range from
46 0 to 31.
47 - touchscreen-size-x : See touchscreen.txt
48 - touchscreen-size-y : See touchscreen.txt
49 - touchscreen-fuzz-x : See touchscreen.txt
50 - touchscreen-fuzz-y : See touchscreen.txt
51 - touchscreen-inverted-x : See touchscreen.txt
52 - touchscreen-inverted-y : See touchscreen.txt
53 - touchscreen-swapped-x-y : See touchscreen.txt
54
55Example:
56 polytouch: edt-ft5x06@38 {
57 compatible = "edt,edt-ft5406", "edt,edt-ft5x06";
58 reg = <0x38>;
59 pinctrl-names = "default";
60 pinctrl-0 = <&edt_ft5x06_pins>;
61 interrupt-parent = <&gpio2>;
62 interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
63 reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
64 wake-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>;
65 };