linux-kernel - Re: [PATCH v2 3/3] dt-bindings: iio: chemical: pms7003: add device tree support

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Date:   Mon, 28 Jan 2019 08:58:19 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Tomasz Duszynski <tduszyns@...il.com>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, johan@...nel.org, robh@...nel.org,
        jic23@...23.retrosnub.co.uk
Subject: Re: [PATCH v2 3/3] dt-bindings: iio: chemical: pms7003: add device
 tree support

On Sun, Jan 27, 2019 at 07:19:16PM +0100, Tomasz Duszynski wrote:
> Add device tree support for Plantower PMS7003 particulate matter sensor.
> 
> Signed-off-by: Tomasz Duszynski <tduszyns@...il.com>
> ---
>  .../iio/chemical/plantower,pms7003.txt        | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt b/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt
> new file mode 100644
> index 000000000000..e4c7f2fb1e30
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.txt
> @@ -0,0 +1,19 @@
> +* Plantower PMS7003 particulate matter sensor
> +
> +Required properties:
> +- compatible: must be "plantower,pms7003"
> +
> +Optional properties:
> +- vcc-supply: phandle to the regulator that provides power to the sensor

Shouldn't this one be a required property?

> +- set-gpios: phandle to the GPIO connected to the SET line
> +- reset-gpios: phandle to the GPIO connected to the RESET line
> +
> +Refer to serial/slave-device.txt for generic serial attached device bindings.
> +
> +Example:
> +
> +&uart0 {
> +	pms7003 {

The node name should be generic and reflect the functionality rather
than model. Perhaps "pms" will do here.

> +		compatible = "plantower,pms7003";
> +	};
> +};

Johan