| * 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. |
| |
| 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 |
| - nvidia,wakeup-source: configure keyboard as a wakeup source for suspend/resume |
| |
| Example: |
| |
| keyboard: keyboard { |
| compatible = "nvidia,tegra20-kbc"; |
| reg = <0x7000e200 0x100>; |
| interrupts = <0 85 0x04>; |
| 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>; |
| }; |
