linux-kernel - Re: [PATCH v8 1/2] iio: proximity: provide device tree binding document

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Message-ID: <20200415145021.GA16420@bogus>
Date:   Wed, 15 Apr 2020 09:50:21 -0500
From:   Rob Herring <robh@...nel.org>
To:     Ivan Mikhaylov <i.mikhaylov@...ro.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [PATCH v8 1/2] iio: proximity: provide device tree binding
 document

On Mon, Apr 06, 2020 at 08:20:01PM +0300, Ivan Mikhaylov wrote:
> Mostly standard i2c driver with some additional led-current option
> for vcnl3020.
> 
> Signed-off-by: Ivan Mikhaylov <i.mikhaylov@...ro.com>
> ---
>  .../bindings/iio/proximity/vcnl3020.yaml      | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/proximity/vcnl3020.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/proximity/vcnl3020.yaml b/Documentation/devicetree/bindings/iio/proximity/vcnl3020.yaml
> new file mode 100644
> index 000000000000..29ab2dee1694
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/proximity/vcnl3020.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: GPL-2.0

Dual license as Jonathan said.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/proximity/vcnl3020.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Integrated Proximity Sensor With Infrared Emitter
> +
> +maintainers:
> +  - Ivan Mikhaylov <i.mikhaylov@...ro.com>
> +
> +description: |
> +  The VCNL3020 is a fully integrated proximity sensor. Fully integrated means
> +  that the infrared emitter is included in the package. It has 16-bit
> +  resolution. It includes a signal processing IC and features standard I2C
> +  communication interface. It features an interrupt function.
> +
> +  Specifications about the devices can be found at:
> +  https://www.vishay.com/docs/84150/vcnl3020.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - vishay,vcnl3020
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    description: IRQ line for the proximity sensor

Can drop this.

> +    maxItems: 1
> +
> +  vdd-supply:
> +    description: Regulator that provides power to the sensor
> +
> +  vddio-supply:
> +    description: Regulator that provides power to the bus
> +
> +  vishay,led-current-milliamp:
> +    description:
> +        IR LED current value with valid Range = 0 to 20d. e.g. 0 = 0 mA,

Should be indented 2 fewer spaces.

> +        1 = 10 mA, 20 = 200 mA (2 = 20 mA = DEFAULT). LED Current is
> +        limited to 200 mA for values higher than decimal 20.

Use the 'default' property to define the default.

> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32

Can drop this as standard units have a type already. However, the 
standard unit is '-microamp', so use that. Also, looks like this is 
in units of register values, not milliamps. Use microamps (e.g. 200000).

> +      - enum: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
> +              18, 19, 20]
> +
> +required:
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +    i2c {
> +
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        proximity@13 {
> +              compatible = "vishay,vcnl3020";
> +              reg = <0x13>;
> +              vishay,led-current-milliamp = <0x14>;
> +        };
> +    };
> -- 
> 2.21.1
>