1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4 5$id: http://devicetree.org/schemas/input/google,cros-ec-keyb.yaml# 6$schema: http://devicetree.org/meta-schemas/core.yaml# 7 8title: ChromeOS EC Keyboard 9 10maintainers: 11 - Simon Glass <sjg@chromium.org> 12 - Benson Leung <bleung@chromium.org> 13 - Enric Balletbo i Serra <enric.balletbo@collabora.com> 14 15description: | 16 Google's ChromeOS EC Keyboard is a simple matrix keyboard 17 implemented on a separate EC (Embedded Controller) device. It provides 18 a message for reading key scans from the EC. These are then converted 19 into keycodes for processing by the kernel. 20 21allOf: 22 - $ref: "/schemas/input/matrix-keymap.yaml#" 23 24properties: 25 compatible: 26 const: google,cros-ec-keyb 27 28 google,needs-ghost-filter: 29 description: 30 Enable a ghost filter for the matrix keyboard. This is recommended 31 if the EC does not have its own logic or hardware for this. 32 type: boolean 33 34 function-row-physmap: 35 minItems: 1 36 maxItems: 15 37 description: | 38 An ordered u32 array describing the rows/columns (in the scan matrix) 39 of top row keys from physical left (KEY_F1) to right. Each entry 40 encodes the row/column as: 41 (((row) & 0xFF) << 24) | (((column) & 0xFF) << 16) 42 where the lower 16 bits are reserved. This property is specified only 43 when the keyboard has a custom design for the top row keys. 44 45required: 46 - compatible 47 48unevaluatedProperties: false 49 50examples: 51 - | 52 #include <dt-bindings/input/input.h> 53 cros-ec-keyb { 54 compatible = "google,cros-ec-keyb"; 55 keypad,num-rows = <8>; 56 keypad,num-columns = <13>; 57 google,needs-ghost-filter; 58 function-row-physmap = < 59 MATRIX_KEY(0x00, 0x02, 0) /* T1 */ 60 MATRIX_KEY(0x03, 0x02, 0) /* T2 */ 61 MATRIX_KEY(0x02, 0x02, 0) /* T3 */ 62 MATRIX_KEY(0x01, 0x02, 0) /* T4 */ 63 MATRIX_KEY(0x03, 0x04, 0) /* T5 */ 64 MATRIX_KEY(0x02, 0x04, 0) /* T6 */ 65 MATRIX_KEY(0x01, 0x04, 0) /* T7 */ 66 MATRIX_KEY(0x02, 0x09, 0) /* T8 */ 67 MATRIX_KEY(0x01, 0x09, 0) /* T9 */ 68 MATRIX_KEY(0x00, 0x04, 0) /* T10 */ 69 >; 70 /* 71 * Keymap entries take the form of 0xRRCCKKKK where 72 * RR=Row CC=Column KKKK=Key Code 73 * The values below are for a US keyboard layout and 74 * are taken from the Linux driver. Note that the 75 * 102ND key is not used for US keyboards. 76 */ 77 linux,keymap = < 78 /* CAPSLCK F1 B F10 */ 79 0x0001003a 0x0002003b 0x00030030 0x00040044 80 /* N = R_ALT ESC */ 81 0x00060031 0x0008000d 0x000a0064 0x01010001 82 /* F4 G F7 H */ 83 0x0102003e 0x01030022 0x01040041 0x01060023 84 /* ' F9 BKSPACE L_CTRL */ 85 0x01080028 0x01090043 0x010b000e 0x0200001d 86 /* TAB F3 T F6 */ 87 0x0201000f 0x0202003d 0x02030014 0x02040040 88 /* ] Y 102ND [ */ 89 0x0205001b 0x02060015 0x02070056 0x0208001a 90 /* F8 GRAVE F2 5 */ 91 0x02090042 0x03010029 0x0302003c 0x03030006 92 /* F5 6 - \ */ 93 0x0304003f 0x03060007 0x0308000c 0x030b002b 94 /* R_CTRL A D F */ 95 0x04000061 0x0401001e 0x04020020 0x04030021 96 /* S K J ; */ 97 0x0404001f 0x04050025 0x04060024 0x04080027 98 /* L ENTER Z C */ 99 0x04090026 0x040b001c 0x0501002c 0x0502002e 100 /* V X , M */ 101 0x0503002f 0x0504002d 0x05050033 0x05060032 102 /* L_SHIFT / . SPACE */ 103 0x0507002a 0x05080035 0x05090034 0x050B0039 104 /* 1 3 4 2 */ 105 0x06010002 0x06020004 0x06030005 0x06040003 106 /* 8 7 0 9 */ 107 0x06050009 0x06060008 0x0608000b 0x0609000a 108 /* L_ALT DOWN RIGHT Q */ 109 0x060a0038 0x060b006c 0x060c006a 0x07010010 110 /* E R W I */ 111 0x07020012 0x07030013 0x07040011 0x07050017 112 /* U R_SHIFT P O */ 113 0x07060016 0x07070036 0x07080019 0x07090018 114 /* UP LEFT */ 115 0x070b0067 0x070c0069>; 116 }; 117