1CROS_EC Keyboard
2
3The CROS_EC (Matrix Keyboard Protocol) allows communcation with a secondary
4micro used for keyboard, and possible other features.
5
6The CROS_EC keyboard uses this protocol to receive key scans and produce input
7in U-Boot.
8
9Required properties :
10- compatible : "google,cros-ec-keyb"
11- google,key-rows : Number of key rows
12- google,key-columns : Number of key columns
13
14Optional properties, in addition to those specified by the shared
15matrix-keyboard bindings:
16
17- linux,fn-keymap: a second keymap, same specification as the
18  matrix-keyboard-controller spec but to be used when the KEY_FN modifier
19  key is pressed.
20- google,repeat-delay-ms : delay in milliseconds before repeat starts
21- google,repeat-rate-ms : delay between each subsequent key press
22- google,ghost-filter : enable ghost filtering for this device
23
24Example, taken from daisy:
25
26cros-ec-keyb {
27	compatible = "google,cros-ec-keyb";
28	google,key-rows = <8>;
29	google,key-columns = <13>;
30	google,ghost-filter;
31	google,repeat-delay-ms = <240>;
32	google,repeat-rate-ms = <30>;
33	/*
34		* Keymap entries take the form of 0xRRCCKKKK where
35		* RR=Row CC=Column KKKK=Key Code
36		* The values below are for a US keyboard layout and
37		* are taken from the Linux driver. Note that the
38		* 102ND key is not used for US keyboards.
39		*/
40	linux,keymap = <
41		/* CAPSLCK F1         B          F10     */
42		0x0001003a 0x0002003c 0x00030030 0x00040044
43		/* N       =          R_ALT      ESC     */
44		0x00060031 0x0008000d 0x000a0064 0x01010001
45		/* F4      G          F7         H       */
46		0x0102003e 0x01030022 0x01040041 0x01060023
47		/* '       F9         BKSPACE    L_CTRL  */
48		0x01080028 0x01090043 0x010b000e 0x0200001d
49		/* TAB     F3         T          F6      */
50		0x0201000f 0x0202003d 0x02030014 0x02040040
51		/* ]       Y          102ND      [       */
52		0x0205001b 0x02060015 0x02070056 0x0208001a
53		/* F8      GRAVE      F2         5       */
54		0x02090042 0x03010029 0x0302003c 0x03030006
55		/* F5      6          -          \       */
56		0x0304003f 0x03060007 0x0308000c 0x030b002b
57		/* R_CTRL  A          D          F       */
58		0x04000061 0x0401001e 0x04020020 0x04030021
59		/* S       K          J          ;       */
60		0x0404001f 0x04050025 0x04060024 0x04080027
61		/* L       ENTER      Z          C       */
62		0x04090026 0x040b001c 0x0501002c 0x0502002e
63		/* V       X          ,          M       */
64		0x0503002f 0x0504002d 0x05050033 0x05060032
65		/* L_SHIFT /          .          SPACE   */
66		0x0507002a 0x05080035 0x05090034 0x050B0039
67		/* 1       3          4          2       */
68		0x06010002 0x06020004 0x06030005 0x06040003
69		/* 8       7          0          9       */
70		0x06050009 0x06060008 0x0608000b 0x0609000a
71		/* L_ALT   DOWN       RIGHT      Q       */
72		0x060a0038 0x060b006c 0x060c006a 0x07010010
73		/* E       R          W          I       */
74		0x07020012 0x07030013 0x07040011 0x07050017
75		/* U       R_SHIFT    P          O       */
76		0x07060016 0x07070036 0x07080019 0x07090018
77		/* UP      LEFT    */
78		0x070b0067 0x070c0069>;
79};
80