1 * Tegra keyboard controller
2 The key controller has maximum 24 pins to make matrix keypad. Any pin
3 can be configured as row or column. The maximum column pin can be 8
4 and maximum row pins can be 16 for Tegra20/Tegra30.
5
6 Required properties:
7 - compatible: "nvidia,tegra20-kbc"
8 - reg: Register base address of KBC.
9 - interrupts: Interrupt number for the KBC.
10 - nvidia,kbc-row-pins: The KBC pins which are configured as row. This is an
11 array of pin numbers which is used as rows.
12 - nvidia,kbc-col-pins: The KBC pins which are configured as column. This is an
13 array of pin numbers which is used as column.
14 - linux,keymap: The keymap for keys as described in the binding document
15 devicetree/bindings/input/matrix-keymap.txt.
16 - clocks: Must contain one entry, for the module clock.
17 See ../clocks/clock-bindings.txt for details.
18 - resets: Must contain an entry for each entry in reset-names.
19 See ../reset/reset.txt for details.
20 - reset-names: Must include the following entries:
21 - kbc
22
23 Optional properties, in addition to those specified by the shared
24 matrix-keyboard bindings:
25
26 - linux,fn-keymap: a second keymap, same specification as the
27 matrix-keyboard-controller spec but to be used when the KEY_FN modifier
28 key is pressed.
29 - nvidia,debounce-delay-ms: delay in milliseconds per row scan for debouncing
30 - nvidia,repeat-delay-ms: delay in milliseconds before repeat starts
31 - nvidia,ghost-filter: enable ghost filtering for this device
32 - wakeup-source: configure keyboard as a wakeup source for suspend/resume
33 (Legacy property supported: "nvidia,wakeup-source")
34
35 Example:
36
37 keyboard: keyboard {
38 compatible = "nvidia,tegra20-kbc";
39 reg = <0x7000e200 0x100>;
40 interrupts = <0 85 0x04>;
41 clocks = <&tegra_car 36>;
42 resets = <&tegra_car 36>;
43 reset-names = "kbc";
44 nvidia,ghost-filter;
45 nvidia,debounce-delay-ms = <640>;
46 nvidia,kbc-row-pins = <0 1 2>; /* pin 0, 1, 2 as rows */
47 nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */
48 linux,keymap = <0x00000074
49 0x00010067
50 0x00020066
51 0x01010068
52 0x02000069
53 0x02010070
54 0x02020071>;
55 };
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