xref: /linux/Documentation/devicetree/bindings/input/touchscreen/ti,tsc2005.yaml (revision 6beeaf48db6c548fcfc2ad32739d33af2fef3a5b) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/input/touchscreen/ti,tsc2005.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Texas Instruments TSC2004 and TSC2005 touchscreen controller bindings
8
9maintainers:
10  - Marek Vasut <marex@denx.de>
11  - Michael Welling <mwelling@ieee.org>
12
13properties:
14  $nodename:
15    pattern: "^touchscreen(@.*)?$"
16
17  compatible:
18    enum:
19      - ti,tsc2004
20      - ti,tsc2005
21
22  reg:
23    maxItems: 1
24    description: |
25      I2C address when used on the I2C bus, or the SPI chip select index
26      when used on the SPI bus
27
28  interrupts:
29    maxItems: 1
30
31  reset-gpios:
32    maxItems: 1
33    description: GPIO specifier for the controller reset line
34
35  spi-max-frequency:
36    description: TSC2005 SPI bus clock frequency.
37    maximum: 25000000
38
39  ti,x-plate-ohms:
40    description: resistance of the touchscreen's X plates in ohm (defaults to 280)
41
42  ti,esd-recovery-timeout-ms:
43    description: |
44        if the touchscreen does not respond after the configured time
45        (in milli seconds), the driver will reset it. This is disabled
46        by default.
47
48  vio-supply:
49    description: Regulator specifier
50
51  touchscreen-fuzz-pressure: true
52  touchscreen-fuzz-x: true
53  touchscreen-fuzz-y: true
54  touchscreen-max-pressure: true
55  touchscreen-size-x: true
56  touchscreen-size-y: true
57
58allOf:
59  - $ref: touchscreen.yaml#
60  - if:
61      properties:
62        compatible:
63          contains:
64            const: ti,tsc2004
65    then:
66      properties:
67        spi-max-frequency: false
68
69additionalProperties: false
70
71required:
72  - compatible
73  - reg
74  - interrupts
75
76examples:
77  - |
78    #include <dt-bindings/interrupt-controller/irq.h>
79    #include <dt-bindings/gpio/gpio.h>
80    i2c {
81        #address-cells = <1>;
82        #size-cells = <0>;
83        touchscreen@48 {
84            compatible = "ti,tsc2004";
85            reg = <0x48>;
86            vio-supply = <&vio>;
87
88            reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
89            interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
90
91            touchscreen-fuzz-x = <4>;
92            touchscreen-fuzz-y = <7>;
93            touchscreen-fuzz-pressure = <2>;
94            touchscreen-size-x = <4096>;
95            touchscreen-size-y = <4096>;
96            touchscreen-max-pressure = <2048>;
97
98            ti,x-plate-ohms = <280>;
99            ti,esd-recovery-timeout-ms = <8000>;
100        };
101    };
102  - |
103    #include <dt-bindings/interrupt-controller/irq.h>
104    #include <dt-bindings/gpio/gpio.h>
105    spi {
106        #address-cells = <1>;
107        #size-cells = <0>;
108        touchscreen@0 {
109            compatible = "ti,tsc2005";
110            spi-max-frequency = <6000000>;
111            reg = <0>;
112
113            vio-supply = <&vio>;
114
115            reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>; /* 104 */
116            interrupts-extended = <&gpio4 4 IRQ_TYPE_EDGE_RISING>; /* 100 */
117
118            touchscreen-fuzz-x = <4>;
119            touchscreen-fuzz-y = <7>;
120            touchscreen-fuzz-pressure = <2>;
121            touchscreen-size-x = <4096>;
122            touchscreen-size-y = <4096>;
123            touchscreen-max-pressure = <2048>;
124
125            ti,x-plate-ohms = <280>;
126            ti,esd-recovery-timeout-ms = <8000>;
127        };
128    };
129