Re: [PATCHv2 1/3] Input: twl4030-keypad - add device tree support

[Kumar Gala]

On Oct 22, 2013, at 7:47 AM, Sebastian Reichel wrote:

> Add device tree support for twl4030 keypad driver and update the
> Documentation with twl4030 keypad device tree binding information.
> 
> Tested on Nokia N900.
> 
> Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
> ---
> .../devicetree/bindings/input/twl4030-keypad.txt   | 31 ++++++++
> drivers/input/keyboard/twl4030_keypad.c            | 91 ++++++++++++++++++----
> 2 files changed, 105 insertions(+), 17 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/input/twl4030-keypad.txt
> 
> diff --git a/Documentation/devicetree/bindings/input/twl4030-keypad.txt b/Documentation/devicetree/bindings/input/twl4030-keypad.txt
> new file mode 100644
> index 0000000..2b4bd7a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/twl4030-keypad.txt
> @@ -0,0 +1,31 @@
> +* TWL4030's Keypad Controller device tree bindings
> +
> +TWL4030's Keypad controller is used to interface a SoC with a matrix-type
> +keypad device. The keypad controller supports multiple row and column lines.
> +A key can be placed at each intersection of a unique row and a unique column.
> +The keypad controller can sense a key-press and key-release and report the
> +event using a interrupt to the cpu.
> +
> +This binding is based on the matrix-keymap binding with the following
> +changes:

Maybe be a bit more specific and say 'based on the input/matrix-keymap.txt binding'..

> +
> + * keypad,num-rows and keypad,num-columns are required.
> +

Is linux,keymap required from matrix-keymap.txt?

> +Required SoC Specific Properties:
> +- compatible: should be one of the following
> +   - "ti,twl4030-keypad": For controllers compatible with twl4030 keypad
> +      controller.
> +- interrupt: should be one of the following
> +   - <1>: For controllers compatible with twl4030 keypad controller.
> +
> +Optional Properties specific to linux:
> +- linux,keypad-no-autorepeat: do no enable autorepeat feature.

Does it make sense to update the matrix-keymap.txt binding to add 'linux,keypad-no-autorepeat' there?

> +
> +Example:
> +	twl_keypad: keypad {
> +		compatible = "ti,twl4030-keypad";
> +		interrupts = <1>;
> +		keypad,num-rows = <8>;
> +		keypad,num-columns = <8>;
> +		linux,keypad-no-autorepeat;
> +	};

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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