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Documentation / devicetree / bindings / input / cros-ec-keyb.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:00 EST.

1	ChromeOS EC Keyboard
2	
3	Google's ChromeOS EC Keyboard is a simple matrix keyboard implemented on
4	a separate EC (Embedded Controller) device. It provides a message for reading
5	key scans from the EC. These are then converted into keycodes for processing
6	by the kernel.
7	
8	This binding is based on matrix-keymap.txt and extends/modifies it as follows:
9	
10	Required properties:
11	- compatible: "google,cros-ec-keyb"
12	
13	Optional properties:
14	- google,needs-ghost-filter: True to enable a ghost filter for the matrix
15	keyboard. This is recommended if the EC does not have its own logic or
16	hardware for this.
17	
18	
19	Example:
20	
21	cros-ec-keyb {
22		compatible = "google,cros-ec-keyb";
23		keypad,num-rows = <8>;
24		keypad,num-columns = <13>;
25		google,needs-ghost-filter;
26		/*
27		 * Keymap entries take the form of 0xRRCCKKKK where
28		 * RR=Row CC=Column KKKK=Key Code
29		 * The values below are for a US keyboard layout and
30		 * are taken from the Linux driver. Note that the
31		 * 102ND key is not used for US keyboards.
32		 */
33		linux,keymap = <
34			/* CAPSLCK F1         B          F10     */
35			0x0001003a 0x0002003b 0x00030030 0x00040044
36			/* N       =          R_ALT      ESC     */
37			0x00060031 0x0008000d 0x000a0064 0x01010001
38			/* F4      G          F7         H       */
39			0x0102003e 0x01030022 0x01040041 0x01060023
40			/* '       F9         BKSPACE    L_CTRL  */
41			0x01080028 0x01090043 0x010b000e 0x0200001d
42			/* TAB     F3         T          F6      */
43			0x0201000f 0x0202003d 0x02030014 0x02040040
44			/* ]       Y          102ND      [       */
45			0x0205001b 0x02060015 0x02070056 0x0208001a
46			/* F8      GRAVE      F2         5       */
47			0x02090042 0x03010029 0x0302003c 0x03030006
48			/* F5      6          -          \       */
49			0x0304003f 0x03060007 0x0308000c 0x030b002b
50			/* R_CTRL  A          D          F       */
51			0x04000061 0x0401001e 0x04020020 0x04030021
52			/* S       K          J          ;       */
53			0x0404001f 0x04050025 0x04060024 0x04080027
54			/* L       ENTER      Z          C       */
55			0x04090026 0x040b001c 0x0501002c 0x0502002e
56			/* V       X          ,          M       */
57			0x0503002f 0x0504002d 0x05050033 0x05060032
58			/* L_SHIFT /          .          SPACE   */
59			0x0507002a 0x05080035 0x05090034 0x050B0039
60			/* 1       3          4          2       */
61			0x06010002 0x06020004 0x06030005 0x06040003
62			/* 8       7          0          9       */
63			0x06050009 0x06060008 0x0608000b 0x0609000a
64			/* L_ALT   DOWN       RIGHT      Q       */
65			0x060a0038 0x060b006c 0x060c006a 0x07010010
66			/* E       R          W          I       */
67			0x07020012 0x07030013 0x07040011 0x07050017
68			/* U       R_SHIFT    P          O       */
69			0x07060016 0x07070036 0x07080019 0x07090018
70			/* UP      LEFT    */
71			0x070b0067 0x070c0069>;
72	};
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