tjh.dev
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linux
1* ST-Microelectronics FingerTip touchscreen controller
2
3The ST-Microelectronics FingerTip device provides a basic touchscreen
4functionality. Along with it the user can enable the touchkey which can work as
5a basic HOME and BACK key for phones.
6
7The driver supports also hovering as an absolute single touch event with x, y, z
8coordinates.
9
10Required properties:
11- compatible : must be "st,stmfts"
12- reg : I2C slave address, (e.g. 0x49)
13- interrupts : interrupt specification
14- avdd-supply : analogic power supply
15- vdd-supply : power supply
16- touchscreen-size-x : see touchscreen.txt
17- touchscreen-size-y : see touchscreen.txt
18
19Optional properties:
20- touch-key-connected : specifies whether the touchkey feature is connected
21- ledvdd-supply : power supply to the touch key leds
22
23Example:
24
25i2c@00000000 {
26
27 /* ... */
28
29 touchscreen@49 {
30 compatible = "st,stmfts";
31 reg = <0x49>;
32 interrupt-parent = <&gpa1>;
33 interrupts = <1 IRQ_TYPE_NONE>;
34 touchscreen-size-x = <1599>;
35 touchscreen-size-y = <2559>;
36 touch-key-connected;
37 avdd-supply = <&ldo30_reg>;
38 vdd-supply = <&ldo31_reg>;
39 ledvdd-supply = <&ldo33_reg>;
40 };
41};