1*4882a593SmuzhiyunChromeOS EC Keyboard 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunGoogle's ChromeOS EC Keyboard is a simple matrix keyboard implemented on 4*4882a593Smuzhiyuna separate EC (Embedded Controller) device. It provides a message for reading 5*4882a593Smuzhiyunkey scans from the EC. These are then converted into keycodes for processing 6*4882a593Smuzhiyunby the kernel. 7*4882a593Smuzhiyun 8*4882a593SmuzhiyunThis binding is based on matrix-keymap.txt and extends/modifies it as follows: 9*4882a593Smuzhiyun 10*4882a593SmuzhiyunRequired properties: 11*4882a593Smuzhiyun- compatible: "google,cros-ec-keyb" 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunOptional properties: 14*4882a593Smuzhiyun- google,needs-ghost-filter: True to enable a ghost filter for the matrix 15*4882a593Smuzhiyunkeyboard. This is recommended if the EC does not have its own logic or 16*4882a593Smuzhiyunhardware for this. 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunExample: 20*4882a593Smuzhiyun 21*4882a593Smuzhiyuncros-ec-keyb { 22*4882a593Smuzhiyun compatible = "google,cros-ec-keyb"; 23*4882a593Smuzhiyun keypad,num-rows = <8>; 24*4882a593Smuzhiyun keypad,num-columns = <13>; 25*4882a593Smuzhiyun google,needs-ghost-filter; 26*4882a593Smuzhiyun /* 27*4882a593Smuzhiyun * Keymap entries take the form of 0xRRCCKKKK where 28*4882a593Smuzhiyun * RR=Row CC=Column KKKK=Key Code 29*4882a593Smuzhiyun * The values below are for a US keyboard layout and 30*4882a593Smuzhiyun * are taken from the Linux driver. Note that the 31*4882a593Smuzhiyun * 102ND key is not used for US keyboards. 32*4882a593Smuzhiyun */ 33*4882a593Smuzhiyun linux,keymap = < 34*4882a593Smuzhiyun /* CAPSLCK F1 B F10 */ 35*4882a593Smuzhiyun 0x0001003a 0x0002003b 0x00030030 0x00040044 36*4882a593Smuzhiyun /* N = R_ALT ESC */ 37*4882a593Smuzhiyun 0x00060031 0x0008000d 0x000a0064 0x01010001 38*4882a593Smuzhiyun /* F4 G F7 H */ 39*4882a593Smuzhiyun 0x0102003e 0x01030022 0x01040041 0x01060023 40*4882a593Smuzhiyun /* ' F9 BKSPACE L_CTRL */ 41*4882a593Smuzhiyun 0x01080028 0x01090043 0x010b000e 0x0200001d 42*4882a593Smuzhiyun /* TAB F3 T F6 */ 43*4882a593Smuzhiyun 0x0201000f 0x0202003d 0x02030014 0x02040040 44*4882a593Smuzhiyun /* ] Y 102ND [ */ 45*4882a593Smuzhiyun 0x0205001b 0x02060015 0x02070056 0x0208001a 46*4882a593Smuzhiyun /* F8 GRAVE F2 5 */ 47*4882a593Smuzhiyun 0x02090042 0x03010029 0x0302003c 0x03030006 48*4882a593Smuzhiyun /* F5 6 - \ */ 49*4882a593Smuzhiyun 0x0304003f 0x03060007 0x0308000c 0x030b002b 50*4882a593Smuzhiyun /* R_CTRL A D F */ 51*4882a593Smuzhiyun 0x04000061 0x0401001e 0x04020020 0x04030021 52*4882a593Smuzhiyun /* S K J ; */ 53*4882a593Smuzhiyun 0x0404001f 0x04050025 0x04060024 0x04080027 54*4882a593Smuzhiyun /* L ENTER Z C */ 55*4882a593Smuzhiyun 0x04090026 0x040b001c 0x0501002c 0x0502002e 56*4882a593Smuzhiyun /* V X , M */ 57*4882a593Smuzhiyun 0x0503002f 0x0504002d 0x05050033 0x05060032 58*4882a593Smuzhiyun /* L_SHIFT / . SPACE */ 59*4882a593Smuzhiyun 0x0507002a 0x05080035 0x05090034 0x050B0039 60*4882a593Smuzhiyun /* 1 3 4 2 */ 61*4882a593Smuzhiyun 0x06010002 0x06020004 0x06030005 0x06040003 62*4882a593Smuzhiyun /* 8 7 0 9 */ 63*4882a593Smuzhiyun 0x06050009 0x06060008 0x0608000b 0x0609000a 64*4882a593Smuzhiyun /* L_ALT DOWN RIGHT Q */ 65*4882a593Smuzhiyun 0x060a0038 0x060b006c 0x060c006a 0x07010010 66*4882a593Smuzhiyun /* E R W I */ 67*4882a593Smuzhiyun 0x07020012 0x07030013 0x07040011 0x07050017 68*4882a593Smuzhiyun /* U R_SHIFT P O */ 69*4882a593Smuzhiyun 0x07060016 0x07070036 0x07080019 0x07090018 70*4882a593Smuzhiyun /* UP LEFT */ 71*4882a593Smuzhiyun 0x070b0067 0x070c0069>; 72*4882a593Smuzhiyun}; 73