diff options
Diffstat (limited to 'Documentation/devicetree/bindings/input/cap1106.txt')
-rw-r--r-- | Documentation/devicetree/bindings/input/cap1106.txt | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/cap1106.txt b/Documentation/devicetree/bindings/input/cap1106.txt new file mode 100644 index 000000000000..4b463904cba0 --- /dev/null +++ b/Documentation/devicetree/bindings/input/cap1106.txt | |||
@@ -0,0 +1,53 @@ | |||
1 | Device tree bindings for Microchip CAP1106, 6 channel capacitive touch sensor | ||
2 | |||
3 | The node for this driver must be a child of a I2C controller node, as the | ||
4 | device communication via I2C only. | ||
5 | |||
6 | Required properties: | ||
7 | |||
8 | compatible: Must be "microchip,cap1106" | ||
9 | |||
10 | reg: The I2C slave address of the device. | ||
11 | Only 0x28 is valid. | ||
12 | |||
13 | interrupts: Property describing the interrupt line the | ||
14 | device's ALERT#/CM_IRQ# pin is connected to. | ||
15 | The device only has one interrupt source. | ||
16 | |||
17 | Optional properties: | ||
18 | |||
19 | autorepeat: Enables the Linux input system's autorepeat | ||
20 | feature on the input device. | ||
21 | |||
22 | microchip,sensor-gain: Defines the gain of the sensor circuitry. This | ||
23 | effectively controls the sensitivity, as a | ||
24 | smaller delta capacitance is required to | ||
25 | generate the same delta count values. | ||
26 | Valid values are 1, 2, 4, and 8. | ||
27 | By default, a gain of 1 is set. | ||
28 | |||
29 | linux,keycodes: Specifies an array of numeric keycode values to | ||
30 | be used for the channels. If this property is | ||
31 | omitted, KEY_A, KEY_B, etc are used as | ||
32 | defaults. The array must have exactly six | ||
33 | entries. | ||
34 | |||
35 | Example: | ||
36 | |||
37 | i2c_controller { | ||
38 | cap1106@28 { | ||
39 | compatible = "microchip,cap1106"; | ||
40 | interrupt-parent = <&gpio1>; | ||
41 | interrupts = <0 0>; | ||
42 | reg = <0x28>; | ||
43 | autorepeat; | ||
44 | microchip,sensor-gain = <2>; | ||
45 | |||
46 | linux,keycodes = <103 /* KEY_UP */ | ||
47 | 106 /* KEY_RIGHT */ | ||
48 | 108 /* KEY_DOWN */ | ||
49 | 105 /* KEY_LEFT */ | ||
50 | 109 /* KEY_PAGEDOWN */ | ||
51 | 104>; /* KEY_PAGEUP */ | ||
52 | }; | ||
53 | } | ||