1*4882a593Smuzhiyun* Tegra keyboard controller 2*4882a593SmuzhiyunThe key controller has maximum 24 pins to make matrix keypad. Any pin 3*4882a593Smuzhiyuncan be configured as row or column. The maximum column pin can be 8 4*4882a593Smuzhiyunand maximum row pins can be 16 for Tegra20/Tegra30. 5*4882a593Smuzhiyun 6*4882a593SmuzhiyunRequired properties: 7*4882a593Smuzhiyun- compatible: "nvidia,tegra20-kbc" 8*4882a593Smuzhiyun- reg: Register base address of KBC. 9*4882a593Smuzhiyun- interrupts: Interrupt number for the KBC. 10*4882a593Smuzhiyun- nvidia,kbc-row-pins: The KBC pins which are configured as row. This is an 11*4882a593Smuzhiyun array of pin numbers which is used as rows. 12*4882a593Smuzhiyun- nvidia,kbc-col-pins: The KBC pins which are configured as column. This is an 13*4882a593Smuzhiyun array of pin numbers which is used as column. 14*4882a593Smuzhiyun- linux,keymap: The keymap for keys as described in the binding document 15*4882a593Smuzhiyun devicetree/bindings/input/matrix-keymap.txt. 16*4882a593Smuzhiyun- clocks: Must contain one entry, for the module clock. 17*4882a593Smuzhiyun See ../clocks/clock-bindings.txt for details. 18*4882a593Smuzhiyun- resets: Must contain an entry for each entry in reset-names. 19*4882a593Smuzhiyun See ../reset/reset.txt for details. 20*4882a593Smuzhiyun- reset-names: Must include the following entries: 21*4882a593Smuzhiyun - kbc 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunOptional properties, in addition to those specified by the shared 24*4882a593Smuzhiyunmatrix-keyboard bindings: 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun- linux,fn-keymap: a second keymap, same specification as the 27*4882a593Smuzhiyun matrix-keyboard-controller spec but to be used when the KEY_FN modifier 28*4882a593Smuzhiyun key is pressed. 29*4882a593Smuzhiyun- nvidia,debounce-delay-ms: delay in milliseconds per row scan for debouncing 30*4882a593Smuzhiyun- nvidia,repeat-delay-ms: delay in milliseconds before repeat starts 31*4882a593Smuzhiyun- nvidia,ghost-filter: enable ghost filtering for this device 32*4882a593Smuzhiyun- wakeup-source: configure keyboard as a wakeup source for suspend/resume 33*4882a593Smuzhiyun (Legacy property supported: "nvidia,wakeup-source") 34*4882a593Smuzhiyun 35*4882a593SmuzhiyunExample: 36*4882a593Smuzhiyun 37*4882a593Smuzhiyunkeyboard: keyboard { 38*4882a593Smuzhiyun compatible = "nvidia,tegra20-kbc"; 39*4882a593Smuzhiyun reg = <0x7000e200 0x100>; 40*4882a593Smuzhiyun interrupts = <0 85 0x04>; 41*4882a593Smuzhiyun clocks = <&tegra_car 36>; 42*4882a593Smuzhiyun resets = <&tegra_car 36>; 43*4882a593Smuzhiyun reset-names = "kbc"; 44*4882a593Smuzhiyun nvidia,ghost-filter; 45*4882a593Smuzhiyun nvidia,debounce-delay-ms = <640>; 46*4882a593Smuzhiyun nvidia,kbc-row-pins = <0 1 2>; /* pin 0, 1, 2 as rows */ 47*4882a593Smuzhiyun nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */ 48*4882a593Smuzhiyun linux,keymap = <0x00000074 49*4882a593Smuzhiyun 0x00010067 50*4882a593Smuzhiyun 0x00020066 51*4882a593Smuzhiyun 0x01010068 52*4882a593Smuzhiyun 0x02000069 53*4882a593Smuzhiyun 0x02010070 54*4882a593Smuzhiyun 0x02020071>; 55*4882a593Smuzhiyun}; 56