On Tue, May 10, 2016 at 07:07:48PM -0700, Grant Grundler wrote:
> From: Daniel Hung-yu Wu <h...@google.com>
> 
> Add binding for Atmel Capacitive Touch Button device.
> 
> Signed-off-by: Daniel Hung-yu Wu <h...@google.com>
> Signed-off-by: Grant Grundler <grund...@chromium.org>
> ---
>  .../devicetree/bindings/input/atmel,captouch.txt   | 34 
> ++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/atmel,captouch.txt
> 
> I haven't posted the corresponding device driver and dtsi changes yet but 
> will shortly.
> 
> V2: split Documentation/devicetree/bindings from driver patch
>     rename "atmel,atmegaxx_captouch" to "atmel,captouch" since it's irrelevant
>            which controller implements the register set/controller.

Is there any notion of firmware versions though?

> 
> V1: posted https://lkml.org/lkml/2016/5/3/613
> 
> diff --git a/Documentation/devicetree/bindings/input/atmel,captouch.txt 
> b/Documentation/devicetree/bindings/input/atmel,captouch.txt
> new file mode 100644
> index 0000000..405d287
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/atmel,captouch.txt
> @@ -0,0 +1,34 @@
> +Device tree bindings for Atmel AtmegaXX capacitive touch sensor
> +
> +The node for this device must be a child of a I2C controller node, as the
> +device communicates via I2C.
> +
> +Required properties:
> +
> +     compatible:     Must be "atmel,captouch".
> +     reg:            The I2C slave address of the device.
> +     interrupts:     Property describing the interrupt line the device
> +                     is connected to. The device only has one interrupt
> +                     source.
> +     linux,keycodes: Specifies an array of numeric keycode values to
> +                     be used for reporting button presses. The array can
> +                     contain up to 8 entries.
> +
> +Optional properties:
> +
> +     autorepeat:     Enables the Linux input system's autorepeat
> +                     feature on the input device.
> +
> +Example:
> +
> +     atmel_captouch@51 {

No underscores in node names please.

> +             compatible = "atmel,captouch";
> +             reg = <0x51>;
> +             interrupt-parent = <&tlmm>;
> +             interrupts = <67 IRQ_TYPE_EDGE_FALLING>;
> +             linux,keycodes = <BTN_0>, <BTN_1>,
> +                     <BTN_2>, <BTN_3>,
> +                     <BTN_4>, <BTN_5>,
> +                     <BTN_6>, <BTN_7>;
> +             autorepeat;
> +     };
> -- 
> 2.1.2
> 

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