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

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Date:   Sun, 19 Jun 2022 12:26:36 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     ChiYuan Huang <u0084500@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        cy_huang <cy_huang@...htek.com>,
        linux-iio <linux-iio@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: iio: adc: Add rtq6056 adc support

On 18/06/2022 19:34, Jonathan Cameron wrote:
> On Sat, 18 Jun 2022 19:00:19 +0200
> Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:
> 
>> On 18/06/2022 08:50, ChiYuan Huang wrote:
>>> Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> 於 2022年6月18日 週六 上午9:45寫道：  
>>>>
>>>> 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.
>>>>  
>>> Use richtek.shunt-resistor-micro-ohms?  
>>
>> Yes.
>>
>>> Or the prefix 'richtek,' can be removed?  
>>
>> No, the vendor prefix must stay.
> 
> It's a standard generic binding used in a bunch of IIO and hwmon
> drivers without vendor prefix.  Mind you I can't find a definition
> in any of the top level binding files.  Probably wants to be in
> adc.yaml for IIO.

Indeed, thanks for correcting me. It should be just
"shunt-resistor-micro-ohms" then.


Best regards,
Krzysztof