| ChromeOS EC Keyboard |
| |
| Google's ChromeOS EC Keyboard is a simple matrix keyboard implemented on |
| a separate EC (Embedded Controller) device. It provides a message for reading |
| key scans from the EC. These are then converted into keycodes for processing |
| by the kernel. |
| |
| This binding is based on matrix-keymap.txt and extends/modifies it as follows: |
| |
| Required properties: |
| - compatible: "google,cros-ec-keyb" |
| |
| Optional properties: |
| - google,needs-ghost-filter: True to enable a ghost filter for the matrix |
| keyboard. This is recommended if the EC does not have its own logic or |
| hardware for this. |
| |
| |
| Example: |
| |
| cros-ec-keyb { |
| compatible = "google,cros-ec-keyb"; |
| keypad,num-rows = <8>; |
| keypad,num-columns = <13>; |
| google,needs-ghost-filter; |
| /* |
| * 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 0x0002003b 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>; |
| }; |
