On Mon, Jan 25, 2016 at 10:37:30AM -0600, Andrew F. Davis wrote:
> Add binding for generic parallel-in/serial-out shift register devices
> used as GPIO.
>
> Signed-off-by: Andrew F. Davis <a...@ti.com>
> ---
> .../devicetree/bindings/gpio/gpio-pisosr.txt | 34
> ++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/gpio/gpio-pisosr.txt
One nit, otherwise:
Acked-by: Rob Herring <r...@kernel.org>
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-pisosr.txt
> b/Documentation/devicetree/bindings/gpio/gpio-pisosr.txt
> new file mode 100644
> index 0000000..e69e8ec
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-pisosr.txt
> @@ -0,0 +1,34 @@
> +Generic Parallel-in/Serial-out Shift Register GPIO Driver
> +
> +This binding describes generic parallel-in/serial-out shift register
> +devices that can be used for GPI (General Purpose Input). This includes
> +SN74165 serial-out shift registers and the SN65HVS88x series of
> +industrial serializers.
> +
> +Required properties:
> + - compatible : Should be "pisosr-gpio".
> + - gpio-controller : Marks the device node as a GPIO controller.
> + - #gpio-cells : Should be two. For consumer use see gpio.txt.
> +
> +Optional properties:
> + - ngpios : Number of GPIO lines, default is 8.
> + - load-gpios : GPIO pin specifier attached to load enable,
> this
> + pin is pulsed before reading from the device to
> + load input pin values into the the device.
> +
> +For other required and optional properties of SPI slave
> +nodes please refer to ../spi/spi-bus.txt.
> +
> +Example:
> +
> + sn65hvs882@0 {
should be gpio@0
> + compatible = "pisosr-gpio";
> + gpio-controller;
> + #gpio-cells = <2>;
> +
> + load-gpios = <&gpio2 23 GPIO_ACTIVE_LOW>;
> +
> + reg = <0>;
> + spi-max-frequency = <1000000>;
> + spi-cpol;
> + };
> --
> 2.7.0
>
