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[karo-tx-linux.git] / Documentation / devicetree / bindings / input / ti,nspire-keypad.txt
1 TI-NSPIRE Keypad
2
3 Required properties:
4 - compatible: Compatible property value should be "ti,nspire-keypad".
5
6 - reg: Physical base address of the peripheral and length of memory mapped
7   region.
8
9 - interrupts: The interrupt number for the peripheral.
10
11 - scan-interval: How often to scan in us. Based on a APB speed of 33MHz, the
12         maximum and minimum delay time is ~2000us and ~500us respectively
13
14 - row-delay: How long to wait before scanning each row.
15
16 - clocks: The clock this peripheral is attached to.
17
18 - linux,keymap: The keymap to use
19         (see Documentation/devicetree/bindings/input/matrix-keymap.txt)
20
21 Optional properties:
22 - active-low: Specify that the keypad is active low (i.e. logical low signifies
23         a key press).
24
25 Example:
26
27 input {
28         compatible = "ti,nspire-keypad";
29         reg = <0x900E0000 0x1000>;
30         interrupts = <16>;
31
32         scan-interval = <1000>;
33         row-delay = <200>;
34
35         clocks = <&apb_pclk>;
36
37         linux,keymap = <
38         0x0000001c      0x0001001c      0x00040039
39         0x0005002c      0x00060015      0x0007000b
40         0x0008000f      0x0100002d      0x01010011
41         0x0102002f      0x01030004      0x01040016
42         0x01050014      0x0106001f      0x01070002
43         0x010a006a      0x02000013      0x02010010
44         0x02020019      0x02030007      0x02040018
45         0x02050031      0x02060032      0x02070005
46         0x02080028      0x0209006c      0x03000026
47         0x03010025      0x03020024      0x0303000a
48         0x03040017      0x03050023      0x03060022
49         0x03070008      0x03080035      0x03090069
50         0x04000021      0x04010012      0x04020020
51         0x0404002e      0x04050030      0x0406001e
52         0x0407000d      0x04080037      0x04090067
53         0x05010038      0x0502000c      0x0503001b
54         0x05040034      0x0505001a      0x05060006
55         0x05080027      0x0509000e      0x050a006f
56         0x0600002b      0x0602004e      0x06030068
57         0x06040003      0x0605006d      0x06060009
58         0x06070001      0x0609000f      0x0708002a
59         0x0709001d      0x070a0033      >;
60 };