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-rw-r--r--Documentation/devicetree/bindings/input/touchscreen/mms114.txt34
-rw-r--r--Documentation/devicetree/bindings/input/touchscreen/stmpe.txt43
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
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@@ -0,0 +1,34 @@
1* MELFAS MMS114 touchscreen controller
2
3Required 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
10Optional properties:
11- contact-threshold:
12- moving-threshold:
13- x-invert: invert X axis
14- y-invert: invert Y axis
15
16Example:
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
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1STMPE Touchscreen
2----------------
3
4Required properties:
5 - compatible: "st,stmpe-ts"
6
7Optional 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
27Node name must be stmpe_touchscreen and should be child node of stmpe node to
28which it belongs.
29
30Example:
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 };