diff options
Diffstat (limited to 'Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt index 72683be6de3..2995fae7ee4 100644 --- a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt +++ b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt @@ -1,7 +1,18 @@ * 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: @@ -19,5 +30,16 @@ 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>; }; |