diff options
| author | Simon Glass <sjg@chromium.org> | 2013-01-10 17:41:32 -0800 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2013-02-08 12:58:40 +0000 |
| commit | 1d0b1c74ed22d2614ae9206febf956f0b22c81a5 (patch) | |
| tree | 35f09caab89441276ce6cfd28437faf26cdb7d35 /Documentation/devicetree/bindings/input/lpc32xx-key.txt | |
| parent | d2f4ec1026fecbef9b72cc899a626516ef3f265f (diff) | |
input: Extend matrix-keypad device tree binding
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>
Diffstat (limited to 'Documentation/devicetree/bindings/input/lpc32xx-key.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/input/lpc32xx-key.txt | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/input/lpc32xx-key.txt b/Documentation/devicetree/bindings/input/lpc32xx-key.txt index 31afd5014c48..bcf62f856358 100644 --- a/Documentation/devicetree/bindings/input/lpc32xx-key.txt +++ b/Documentation/devicetree/bindings/input/lpc32xx-key.txt @@ -1,19 +1,22 @@ NXP LPC32xx Key Scan Interface +This binding is based on the matrix-keymap binding with the following +changes: + Required Properties: - compatible: Should be "nxp,lpc3220-key" - reg: Physical base address of the controller and length of memory mapped region. - interrupts: The interrupt number to the cpu. -- keypad,num-rows: Number of rows and columns, e.g. 1: 1x1, 6: 6x6 -- keypad,num-columns: Must be equal to keypad,num-rows since LPC32xx only - supports square matrices - nxp,debounce-delay-ms: Debounce delay in ms - nxp,scan-delay-ms: Repeated scan period in ms - linux,keymap: the key-code to be reported when the key is pressed and released, see also Documentation/devicetree/bindings/input/matrix-keymap.txt +Note: keypad,num-rows and keypad,num-columns are required, and must be equal +since LPC32xx only supports square matrices + Example: key@40050000 { |