[PATCH] staging: iio: ad5933: add binding doc for ad5933

[Jonathan Cameron]

On Sun, 2 Dec 2018 14:57:12 -0200
Marcelo Schmitt <marcelo.schmitt1 at gmail.com> wrote:

> Add a devicetree documentation for the ad5933 and ad5934 impedance
> converter, network analyzer.
> 
> Co-Developed-by: Gabriel Capella <gabriel at capella.pro>

Put this in line below Gabriel's sign off - it makes script
parsing of these easier.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1 at gmail.com>
Signed-off-by: Gabriel Capella <gabriel at capella.pro>
Co-Developed-by: Gabriel Capella <gabriel at capella.pro>

> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt1 at gmail.com>
> Signed-off-by: Gabriel Capella <gabriel at capella.pro>
> ---
>  .../iio/impedance-analyzer/ad5933.txt         | 23 +++++++++++++++++++
>  1 file changed, 23 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/impedance-analyzer/ad5933.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/impedance-analyzer/ad5933.txt b/Documentation/devicetree/bindings/iio/impedance-analyzer/ad5933.txt
> new file mode 100644
> index 000000000000..d9ae2babf016
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/impedance-analyzer/ad5933.txt
> @@ -0,0 +1,23 @@
> +Analog Devices AD5933/AD5934 Impedance Converter, Network Analyzer
> +
> +https://www.analog.com/media/en/technical-documentation/data-sheets/AD5933.pdf
> +https://www.analog.com/media/en/technical-documentation/data-sheets/AD5934.pdf
> +
> +Required properties:
> + - compatible : should be one of
> +		"adi,ad5933"
> +		"adi,ad5934"
> + - reg : the I2C address
> + - vdd-supply : supply reference for the device.
> +
> +Optional properties:
> + - vref_mv : default voltage reference.

Regulator framework rather than a simple voltage.

> + - ext_clk_hz : external master clock for the system.

Please use the clocks framework for this rather than rolling our own.
There are fixed clocks to cover the common case, but it may be supplied by
something smarter.

> +
> +Example:
> +
> +	impedance-analyzer at 0d {
> +		compatible = "adi,ad5933";
> +		reg = <0x0d>;
> +		vdd-supply = <&vdd_supply>;
> +	};