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SubjectRe: [PATCH 1/2] input: misc: Add generic input driver to read encoded GPIO lines
On Fri, Aug 12, 2016 at 10:22:28AM +0530, Vignesh R wrote:
> Add a driver to read group of GPIO lines and provide its status as a
> numerical value as input event to the system. This will help in
> intefacing devices, that can be connected over GPIOs, that provide input
> to the system by driving GPIO lines connected to them like a rotary dial
> or a switch.
>
> For example, a rotary switch can be connected to four GPIO lines. The
> status of the GPIO lines reflect the actual position of the rotary
> switch dial. For example, if dial points to 9, then the four GPIO lines
> connected to the switch will read HLLH(0b'1001 = 9). This value
> can be reported as an ABS_* event to the input subsystem.
>
> Signed-off-by: Vignesh R <vigneshr@ti.com>
> ---
> .../devicetree/bindings/input/gpio-decoder.txt | 23 ++++
> drivers/input/misc/Kconfig | 12 ++
> drivers/input/misc/Makefile | 1 +
> drivers/input/misc/gpio_decoder.c | 128 +++++++++++++++++++++
> 4 files changed, 164 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/gpio-decoder.txt
> create mode 100644 drivers/input/misc/gpio_decoder.c
>
> diff --git a/Documentation/devicetree/bindings/input/gpio-decoder.txt b/Documentation/devicetree/bindings/input/gpio-decoder.txt
> new file mode 100644
> index 000000000000..efd947f52cb3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/gpio-decoder.txt
> @@ -0,0 +1,23 @@
> +* GPIO Decoder DT bindings
> +
> +Required Properties:
> +- compatible: should be "gpio-decoder"
> +- gpios: a spec of gpios (atleast two) to be decoded to a number with
> + first entry representing the MSB.
> +
> +Optional Properties:
> +- gpio-decoder,max-value: Maximum possible value that can be reported by

Just "decoder-max-value".

With that, the binding looks fine to me:

Acked-by: Rob Herring <robh@kernel.org>

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