diff options
Diffstat (limited to 'Documentation/devicetree/bindings/input/touchscreen')
-rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/mms114.txt | 34 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/stmpe.txt | 43 |
2 files changed, 77 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt new file mode 100644 index 000000000000..89d4c56c5671 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt | |||
@@ -0,0 +1,34 @@ | |||
1 | * MELFAS MMS114 touchscreen controller | ||
2 | |||
3 | Required properties: | ||
4 | - compatible: must be "melfas,mms114" | ||
5 | - reg: I2C address of the chip | ||
6 | - interrupts: interrupt to which the chip is connected | ||
7 | - x-size: horizontal resolution of touchscreen | ||
8 | - y-size: vertical resolution of touchscreen | ||
9 | |||
10 | Optional properties: | ||
11 | - contact-threshold: | ||
12 | - moving-threshold: | ||
13 | - x-invert: invert X axis | ||
14 | - y-invert: invert Y axis | ||
15 | |||
16 | Example: | ||
17 | |||
18 | i2c@00000000 { | ||
19 | /* ... */ | ||
20 | |||
21 | touchscreen@48 { | ||
22 | compatible = "melfas,mms114"; | ||
23 | reg = <0x48>; | ||
24 | interrupts = <39 0>; | ||
25 | x-size = <720>; | ||
26 | y-size = <1280>; | ||
27 | contact-threshold = <10>; | ||
28 | moving-threshold = <10>; | ||
29 | x-invert; | ||
30 | y-invert; | ||
31 | }; | ||
32 | |||
33 | /* ... */ | ||
34 | }; | ||
diff --git a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt new file mode 100644 index 000000000000..127baa31a77a --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt | |||
@@ -0,0 +1,43 @@ | |||
1 | STMPE Touchscreen | ||
2 | ---------------- | ||
3 | |||
4 | Required properties: | ||
5 | - compatible: "st,stmpe-ts" | ||
6 | |||
7 | Optional properties: | ||
8 | - st,sample-time: ADC converstion time in number of clock. (0 -> 36 clocks, 1 -> | ||
9 | 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks, 4 -> 80 clocks, 5 -> 96 clocks, 6 | ||
10 | -> 144 clocks), recommended is 4. | ||
11 | - st,mod-12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC) | ||
12 | - st,ref-sel: ADC reference source (0 -> internal reference, 1 -> external | ||
13 | reference) | ||
14 | - st,adc-freq: ADC Clock speed (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz) | ||
15 | - st,ave-ctrl: Sample average control (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 | ||
16 | samples, 3 -> 8 samples) | ||
17 | - st,touch-det-delay: Touch detect interrupt delay (0 -> 10 us, 1 -> 50 us, 2 -> | ||
18 | 100 us, 3 -> 500 us, 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms) recommended | ||
19 | is 3 | ||
20 | - st,settling: Panel driver settling time (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 | ||
21 | -> 1 ms, 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms) recommended is 2 | ||
22 | - st,fraction-z: Length of the fractional part in z (fraction-z ([0..7]) = Count of | ||
23 | the fractional part) recommended is 7 | ||
24 | - st,i-drive: current limit value of the touchscreen drivers (0 -> 20 mA typical 35 | ||
25 | mA max, 1 -> 50 mA typical 80 mA max) | ||
26 | |||
27 | Node name must be stmpe_touchscreen and should be child node of stmpe node to | ||
28 | which it belongs. | ||
29 | |||
30 | Example: | ||
31 | |||
32 | stmpe_touchscreen { | ||
33 | compatible = "st,stmpe-ts"; | ||
34 | st,sample-time = <4>; | ||
35 | st,mod-12b = <1>; | ||
36 | st,ref-sel = <0>; | ||
37 | st,adc-freq = <1>; | ||
38 | st,ave-ctrl = <1>; | ||
39 | st,touch-det-delay = <2>; | ||
40 | st,settling = <2>; | ||
41 | st,fraction-z = <7>; | ||
42 | st,i-drive = <1>; | ||
43 | }; | ||