| CROS_EC Keyboard |
| |
| The CROS_EC (Matrix Keyboard Protocol) allows communcation with a secondary |
| micro used for keyboard, and possible other features. |
| |
| The CROS_EC keyboard uses this protocol to receive key scans and produce input |
| in U-Boot. |
| |
| Required properties : |
| - compatible : "google,cros-ec-keyb" |
| - google,key-rows : Number of key rows |
| - google,key-columns : Number of key columns |
| |
| Optional properties, in addition to those specified by the shared |
| matrix-keyboard bindings: |
| |
| - linux,fn-keymap: a second keymap, same specification as the |
| matrix-keyboard-controller spec but to be used when the KEY_FN modifier |
| key is pressed. |
| - google,repeat-delay-ms : delay in milliseconds before repeat starts |
| - google,repeat-rate-ms : delay between each subsequent key press |
| - google,ghost-filter : enable ghost filtering for this device |
| |
| Example, taken from daisy: |
| |
| cros-ec-keyb { |
| compatible = "google,cros-ec-keyb"; |
| google,key-rows = <8>; |
| google,key-columns = <13>; |
| google,ghost-filter; |
| google,repeat-delay-ms = <240>; |
| google,repeat-rate-ms = <30>; |
| /* |
| * Keymap entries take the form of 0xRRCCKKKK where |
| * RR=Row CC=Column KKKK=Key Code |
| * The values below are for a US keyboard layout and |
| * are taken from the Linux driver. Note that the |
| * 102ND key is not used for US keyboards. |
| */ |
| linux,keymap = < |
| /* CAPSLCK F1 B F10 */ |
| 0x0001003a 0x0002003c 0x00030030 0x00040044 |
| /* N = R_ALT ESC */ |
| 0x00060031 0x0008000d 0x000a0064 0x01010001 |
| /* F4 G F7 H */ |
| 0x0102003e 0x01030022 0x01040041 0x01060023 |
| /* ' F9 BKSPACE L_CTRL */ |
| 0x01080028 0x01090043 0x010b000e 0x0200001d |
| /* TAB F3 T F6 */ |
| 0x0201000f 0x0202003d 0x02030014 0x02040040 |
| /* ] Y 102ND [ */ |
| 0x0205001b 0x02060015 0x02070056 0x0208001a |
| /* F8 GRAVE F2 5 */ |
| 0x02090042 0x03010029 0x0302003c 0x03030006 |
| /* F5 6 - \ */ |
| 0x0304003f 0x03060007 0x0308000c 0x030b002b |
| /* R_CTRL A D F */ |
| 0x04000061 0x0401001e 0x04020020 0x04030021 |
| /* S K J ; */ |
| 0x0404001f 0x04050025 0x04060024 0x04080027 |
| /* L ENTER Z C */ |
| 0x04090026 0x040b001c 0x0501002c 0x0502002e |
| /* V X , M */ |
| 0x0503002f 0x0504002d 0x05050033 0x05060032 |
| /* L_SHIFT / . SPACE */ |
| 0x0507002a 0x05080035 0x05090034 0x050B0039 |
| /* 1 3 4 2 */ |
| 0x06010002 0x06020004 0x06030005 0x06040003 |
| /* 8 7 0 9 */ |
| 0x06050009 0x06060008 0x0608000b 0x0609000a |
| /* L_ALT DOWN RIGHT Q */ |
| 0x060a0038 0x060b006c 0x060c006a 0x07010010 |
| /* E R W I */ |
| 0x07020012 0x07030013 0x07040011 0x07050017 |
| /* U R_SHIFT P O */ |
| 0x07060016 0x07070036 0x07080019 0x07090018 |
| /* UP LEFT */ |
| 0x070b0067 0x070c0069>; |
| }; |
