* Tegra keyboard controller The key controller has maximum 24 pins to make matrix keypad. Any pin can be configured as row or column. The maximum column pin can be 8 and maximum row pins can be 16 for Tegra20/Tegra30. Required properties: - compatible: "nvidia,tegra20-kbc" - reg: Register base address of KBC. - interrupts: Interrupt number for the KBC. - nvidia,kbc-row-pins: The KBC pins which are configured as row. This is an array of pin numbers which is used as rows. - nvidia,kbc-col-pins: The KBC pins which are configured as column. This is an array of pin numbers which is used as column. - linux,keymap: The keymap for keys as described in the binding document devicetree/bindings/input/matrix-keymap.txt. - clocks: Must contain one entry, for the module clock. See ../clocks/clock-bindings.txt for details. - resets: Must contain an entry for each entry in reset-names. See ../reset/reset.txt for details. - reset-names: Must include the following entries: - kbc Optional properties, in addition to those specified by the shared matrix-keyboard bindings: - linux,fn-keymap: a second keymap, same specification as the matrix-keyboard-controller spec but to be used when the KEY_FN modifier key is pressed. - nvidia,debounce-delay-ms: delay in milliseconds per row scan for debouncing - nvidia,repeat-delay-ms: delay in milliseconds before repeat starts - nvidia,ghost-filter: enable ghost filtering for this device - wakeup-source: configure keyboard as a wakeup source for suspend/resume (Legacy property supported: "nvidia,wakeup-source") Example: keyboard: keyboard { compatible = "nvidia,tegra20-kbc"; reg = <0x7000e200 0x100>; interrupts = <0 85 0x04>; clocks = <&tegra_car 36>; resets = <&tegra_car 36>; reset-names = "kbc"; nvidia,ghost-filter; nvidia,debounce-delay-ms = <640>; nvidia,kbc-row-pins = <0 1 2>; /* pin 0, 1, 2 as rows */ nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */ linux,keymap = <0x00000074 0x00010067 0x00020066 0x01010068 0x02000069 0x02010070 0x02020071>; };