lkml.org 
[lkml]   [2018]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 11/14] staging: iio: ad7746: Add devicetree bindings documentation
On Fri, 13 Apr 2018 13:36:48 -0300
Hernán Gonzalez <hernan@vanguardiasur.com.ar> wrote:

> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Hernán Gonzalez <hernan@vanguardiasur.com.ar>
A few comments inline.

Thanks,

Jonathan

> ---
> .../devicetree/bindings/staging/iio/cdc/ad7746.txt | 34 ++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
>
> diff --git a/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt b/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
> new file mode 100644
> index 0000000..7740f05
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
> @@ -0,0 +1,34 @@
> +Analog Devices AD7746/5/7 capacitive sensor driver
> +
> +Required properties:
> + - compatible: Should be one of
> + * "adi,ad7745"
> + * "adi,ad7746"
> + * "adi,ad7747"
> + - reg: The 7-bits long I2c address of the device
> +
> +Optional properties:
> + - adi,exclvl: This property defines the excitation voltage level for the
> + capacitance to be measured. Possible values are:
> + * 0 = +-VDD/8
> + * 1 = +-VDD/4
> + * 2 = +-VDD * 3/8
> + * 3 = +-VDD/2 (Default)
> + - adi,nexca_en: Invert excitation output A.

The naming is rather odd. Why _en?

> + - adi,nexcb_en: Invert excitation output B.
> +
> +Example:
> +Here exclvl would be 1 (VDD/4), Excitation pin A would be inverted and
> +Excitation pin B would NOT be inverted.
> +
> +i2c2 {
> +
> + < . . . >
What does this spacer add to the example?
Sure, there can be other devices, but no need to illustrate that here.

> +
> + ad7746: ad7746@60 {
> + compatible = "ad7746";
> + reg = <0x60>;
> + adi,exclvl = <1>;
> + adi,nexca_en;
> + };
> +};

\
 
 \ /
  Last update: 2018-04-15 17:38    [W:0.117 / U:18.660 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site