tjh.dev
Linux kernel mirror (for testing)
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1Device tree bindings for Zinitx BT541 touchscreen controller
2
3Required properties:
4
5 - compatible : Should be "zinitix,bt541"
6 - reg : I2C address of the chip. Should be 0x20
7 - interrupts : Interrupt to which the chip is connected
8
9Optional properties:
10
11 - vdd-supply : Analog power supply regulator on VCCA pin
12 - vddo-supply : Digital power supply regulator on VDD pin
13 - zinitix,mode : Mode of reporting touch points. Some modes may not work
14 with a particular ts firmware for unknown reasons. Available
15 modes are 1 and 2. Mode 2 is the default and preferred.
16
17The touchscreen-* properties are documented in touchscreen.txt in this
18directory.
19
20Example:
21
22 i2c@00000000 {
23 /* ... */
24
25 bt541@20 {
26 compatible = "zinitix,bt541";
27 reg = <0x20>;
28 interrupt-parent = <&msmgpio>;
29 interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
30 pinctrl-names = "default";
31 pinctrl-0 = <&tsp_default>;
32 vdd-supply = <®_vdd_tsp>;
33 vddo-supply = <&pm8916_l6>;
34 touchscreen-size-x = <540>;
35 touchscreen-size-y = <960>;
36 zinitix,mode = <2>;
37 };
38
39 /* ... */
40 };