1A simple common binding for matrix-connected key boards. Currently targeted at 2defining the keys in the scope of linux key codes since that is a stable and 3standardized interface at this time. 4 5Required properties: 6- linux,keymap: an array of packed 1-cell entries containing the equivalent 7 of row, column and linux key-code. The 32-bit big endian cell is packed 8 as: 9 row << 24 | column << 16 | key-code 10 11Optional properties: 12Properties for the number of rows and columns are optional because some 13drivers will use fixed values for these. 14- keypad,num-rows: Number of row lines connected to the keypad controller. 15- keypad,num-columns: Number of column lines connected to the keypad 16 controller. 17 18Some users of this binding might choose to specify secondary keymaps for 19cases where there is a modifier key such as a Fn key. Proposed names 20for said properties are "linux,fn-keymap" or with another descriptive 21word for the modifier other from "Fn". 22 23Example: 24 linux,keymap = < 0x00030012 25 0x0102003a >; 26 keypad,num-rows = <2>; 27 keypad,num-columns = <8>; 28