linux-kernel - Re: [PATCH 1/2] dt-bindings: iio: adc: Add rtq6056 adc support

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Date:   Fri, 17 Jun 2022 18:45:02 -0700
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     cy_huang <u0084500@...il.com>, jic23@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org
Cc:     lars@...afoo.de, cy_huang@...htek.com, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: iio: adc: Add rtq6056 adc support

On 17/06/2022 02:32, cy_huang wrote:
> From: ChiYuan Huang <cy_huang@...htek.com>
> 
> Add the documentation for Richtek RTQ6056.
> 
> Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
> ---
>  .../bindings/iio/adc/richtek,rtq6056-adc.yaml      | 57 ++++++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/richtek,rtq6056-adc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/richtek,rtq6056-adc.yaml b/Documentation/devicetree/bindings/iio/adc/richtek,rtq6056-adc.yaml
> new file mode 100644
> index 00000000..6b4e0e0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/richtek,rtq6056-adc.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/richtek,rtq6056-adc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: RTQ6056 Bi-Directional Current and Power Monitor with 16-bit ADC
> +
> +maintainers:
> +  - ChiYuan Huang <cy_huang@...htek.com>
> +
> +description: |
> +  The RTQ6056 is a high accuracy current-sense monitor with I2C and SMBus
> +  interface, and the device provides full information for system by reading
> +  out the loading current and power.
> +
> +  The device monitors both of the drops across sense resistor and the BUS
> +  voltage, converts into the current in amperes, and power in watts through
> +  internal analog-to-digital converter ADC. The programmable calibration,
> +  adjustable conversion time, and averaging function are also built in for
> +  more design flexibility.
> +
> +  Datasheet is available at
> +  https://www.richtek.com/assets/product_file/RTQ6056/DSQ6056-00.pdf
> +
> +properties:
> +  compatible:
> +    const: richtek,rtq6056
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#io-channel-cells":
> +    const: 1
> +
> +  richtek,shunt-resistor-uohm:

Use standard properties, so "-micro-ohms". Drop the unit from
description and drop the ref.

> +    description: Shunt IN+/IN- sensing node resistor in microohm.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#io-channel-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +      rtq6056@40 {

Generic node name, so probably "adc" (or something else appropriate).

> +        compatible = "richtek,rtq6056";
> +        reg = <0x40>;
> +        #io-channel-cells = <1>;
> +      };
> +    };


Best regards,
Krzysztof