Documentation/devicetree/bindings/input/cros-ec-keyb.txt

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