1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/input/touchscreen/zinitix,bt400.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Zinitix BT4xx and BT5xx series touchscreen controller
8
9 description: The Zinitix BT4xx and BT5xx series of touchscreen controllers
10 are Korea-produced touchscreens with embedded microcontrollers. The
11 BT4xx series was produced 2010-2013 and the BT5xx series 2013-2014.
12
13 maintainers:
14 - Michael Srba <Michael.Srba@seznam.cz>
15 - Linus Walleij <linus.walleij@linaro.org>
16
17 allOf:
18 - $ref: touchscreen.yaml#
19 - $ref: ../input.yaml#
20
21 properties:
22 $nodename:
23 pattern: "^touchscreen(@.*)?$"
24
25 compatible:
26 enum:
27 - zinitix,bt402
28 - zinitix,bt403
29 - zinitix,bt404
30 - zinitix,bt412
31 - zinitix,bt413
32 - zinitix,bt431
33 - zinitix,bt432
34 - zinitix,bt531
35 - zinitix,bt532
36 - zinitix,bt538
37 - zinitix,bt541
38 - zinitix,bt548
39 - zinitix,bt554
40 - zinitix,at100
41
42 reg:
43 description: I2C address on the I2C bus
44
45 clock-frequency:
46 description: I2C client clock frequency, defined for host when using
47 the device on the I2C bus
48 minimum: 0
49 maximum: 400000
50
51 interrupts:
52 description: Interrupt to host
53 maxItems: 1
54
55 vcca-supply:
56 description: Analog power supply regulator on the VCCA pin
57
58 vdd-supply:
59 description: Digital power supply regulator on the VDD pin.
60 In older device trees this can be the accidental name for the analog
61 supply on the VCCA pin, and in that case the deprecated vddo-supply is
62 used for the digital power supply.
63
64 vddo-supply:
65 description: Deprecated name for the digital power supply, use vdd-supply
66 as this reflects the real name of the pin. If this supply is present,
67 the vdd-supply represents VCCA instead of VDD. Implementers should first
68 check for this property, and if it is present assume that the vdd-supply
69 represents the analog supply.
70 deprecated: true
71
72 reset-gpios:
73 description: Reset line for the touchscreen, should be tagged
74 as GPIO_ACTIVE_LOW
75
76 zinitix,mode:
77 description: Mode of reporting touch points. Some modes may not work
78 with a particular ts firmware for unknown reasons. Available modes are
79 1 and 2. Mode 2 is the default and preferred.
80 $ref: /schemas/types.yaml#/definitions/uint32
81 enum: [1, 2]
82
83 linux,keycodes:
84 description:
85 This property specifies an array of keycodes assigned to the
86 touch-keys that can be present in some touchscreen configurations.
87 If the touch-keys are enabled, controller firmware will assign some
88 touch sense lines to those keys.
89 minItems: 1
90 maxItems: 8
91
92 touchscreen-size-x: true
93 touchscreen-size-y: true
94 touchscreen-fuzz-x: true
95 touchscreen-fuzz-y: true
96
97 additionalProperties: false
98
99 required:
100 - compatible
101 - reg
102 - interrupts
103 - touchscreen-size-x
104 - touchscreen-size-y
105
106 examples:
107 - |
108 #include <dt-bindings/interrupt-controller/irq.h>
109 #include <dt-bindings/gpio/gpio.h>
110 i2c {
111 #address-cells = <1>;
112 #size-cells = <0>;
113
114 touchscreen@20 {
115 compatible = "zinitix,bt541";
116 reg = <0x20>;
117 interrupt-parent = <&gpio>;
118 interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
119 vcca-supply = <®_vcca_tsp>;
120 vdd-supply = <®_vdd_tsp>;
121 touchscreen-size-x = <540>;
122 touchscreen-size-y = <960>;
123 zinitix,mode = <2>;
124 };
125 };
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