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1d0b1c74ed
Some matrix keypad drivers can support different numbers of rows and columns. Add a generic binding for these. Implementation note: In order to implement this binding in the kernel, we will need to modify matrix_keypad_() to look up the number of rows and cols in the keymap. Perhaps this could be done by passing 0 for these parameters? Many of the parameters can already be set to NULL. Ick. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
29 lines
935 B
Plaintext
29 lines
935 B
Plaintext
* TI's Keypad Controller device tree bindings
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TI's Keypad controller is used to interface a SoC with a matrix-type
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keypad device. The keypad controller supports multiple row and column lines.
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A key can be placed at each intersection of a unique row and a unique column.
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The keypad controller can sense a key-press and key-release and report the
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event using a interrupt to the cpu.
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This binding is based on the matrix-keymap binding with the following
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changes:
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keypad,num-rows and keypad,num-columns are required.
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Required SoC Specific Properties:
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- compatible: should be one of the following
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- "ti,omap4-keypad": For controllers compatible with omap4 keypad
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controller.
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Optional Properties specific to linux:
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- linux,keypad-no-autorepeat: do no enable autorepeat feature.
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Example:
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keypad@4ae1c000{
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compatible = "ti,omap4-keypad";
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keypad,num-rows = <2>;
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keypad,num-columns = <8>;
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linux,keypad-no-autorepeat;
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};
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