1* Tegra keyboard controller
2The key controller has maximum 24 pins to make matrix keypad. Any pin
3can be configured as row or column. The maximum column pin can be 8
4and maximum row pins can be 16 for Tegra20/Tegra30.
5
6Required 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
17Optional properties, in addition to those specified by the shared
18matrix-keyboard bindings:
19
20- linux,fn-keymap: a second keymap, same specification as the
21  matrix-keyboard-controller spec but to be used when the KEY_FN modifier
22  key is pressed.
23- nvidia,debounce-delay-ms: delay in milliseconds per row scan for debouncing
24- nvidia,repeat-delay-ms: delay in milliseconds before repeat starts
25- nvidia,ghost-filter: enable ghost filtering for this device
26- nvidia,wakeup-source: configure keyboard as a wakeup source for suspend/resume
27
28Example:
29
30keyboard: keyboard {
31	compatible = "nvidia,tegra20-kbc";
32	reg = <0x7000e200 0x100>;
33	interrupts = <0 85 0x04>;
34	nvidia,ghost-filter;
35	nvidia,debounce-delay-ms = <640>;
36	nvidia,kbc-row-pins = <0 1 2>;    /* pin 0, 1, 2 as rows */
37	nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */
38	linux,keymap = <0x00000074
39			0x00010067
40			0x00020066
41			0x01010068
42			0x02000069
43			0x02010070
44			0x02020071>;
45};
46