xref: /linux/Documentation/devicetree/bindings/input/elan,ekth6915.yaml (revision 5089ec0bb1bc80a87cfbc2a90e047161adfcb630) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/input/elan,ekth6915.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Elan I2C-HID touchscreen controllers
8
9maintainers:
10  - Douglas Anderson <dianders@chromium.org>
11
12description:
13  Supports the Elan eKTH6915 and other I2C-HID touchscreen controllers.
14  These touchscreen controller use the i2c-hid protocol with a reset GPIO.
15
16allOf:
17  - $ref: /schemas/input/touchscreen/touchscreen.yaml#
18
19properties:
20  compatible:
21    oneOf:
22      - items:
23          - enum:
24              - elan,ekth5015m
25          - const: elan,ekth6915
26      - items:
27          - const: elan,ekth8d18
28          - const: elan,ekth6a12nay
29      - enum:
30          - elan,ekth6915
31          - elan,ekth6a12nay
32
33  reg: true
34
35  interrupts:
36    maxItems: 1
37
38  panel: true
39
40  reset-gpios:
41    description: Reset GPIO; not all touchscreens using eKTH6915 hook this up.
42
43  no-reset-on-power-off:
44    type: boolean
45    description:
46      Reset line is wired so that it can (and should) be left deasserted when
47      the power supply is off.
48
49  vcc33-supply:
50    description: The 3.3V supply to the touchscreen.
51
52  vccio-supply:
53    description:
54      The IO supply to the touchscreen. Need not be specified if this is the
55      same as the 3.3V supply.
56
57required:
58  - compatible
59  - reg
60  - interrupts
61  - vcc33-supply
62
63additionalProperties: false
64
65examples:
66  - |
67    #include <dt-bindings/gpio/gpio.h>
68    #include <dt-bindings/interrupt-controller/irq.h>
69
70    i2c {
71      #address-cells = <1>;
72      #size-cells = <0>;
73
74      touchscreen@10 {
75        compatible = "elan,ekth5015m", "elan,ekth6915";
76        reg = <0x10>;
77
78        interrupt-parent = <&tlmm>;
79        interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
80
81        reset-gpios = <&tlmm 8 GPIO_ACTIVE_LOW>;
82        vcc33-supply = <&pp3300_ts>;
83      };
84    };
85