| Hung-ying Tyan | 4a48bcf | 2013-05-15 18:27:32 +0800 | [diff] [blame^] | 1 | CROS_EC Keyboard |
| 2 | |
| 3 | The CROS_EC (Matrix Keyboard Protocol) allows communcation with a secondary |
| 4 | micro used for keyboard, and possible other features. |
| 5 | |
| 6 | The CROS_EC keyboard uses this protocol to receive key scans and produce input |
| 7 | in U-Boot. |
| 8 | |
| 9 | Required properties : |
| 10 | - compatible : "google,cros-ec-keyb" |
| 11 | - google,key-rows : Number of key rows |
| 12 | - google,key-columns : Number of key columns |
| 13 | |
| 14 | Optional properties, in addition to those specified by the shared |
| 15 | matrix-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 | |
| 24 | Example, taken from daisy: |
| 25 | |
| 26 | cros-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 | }; |