linux-kernel - Re: [PATCH 2/3] iio: adc: Add PMIC7 ADC bindings

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Date:   Mon, 6 Apr 2020 17:15:21 +0530
From:   Jishnu Prakash <jprakash@...eaurora.org>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     agross@...nel.org, bjorn.andersson@...aro.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        mka@...omium.org, linus.walleij@...aro.org, sboyd@...eaurora.org,
        Jonathan.Cameron@...wei.com, smohanad@...eaurora.org,
        kgunda@...eaurora.org, aghayal@...eaurora.org,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-iio@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-arm-msm-owner@...r.kernel.org
Subject: Re: [PATCH 2/3] iio: adc: Add PMIC7 ADC bindings

Hi Jonathan,

On 3/28/2020 10:24 PM, Jonathan Cameron wrote:
> On Tue, 24 Mar 2020 21:14:09 +0530
> Jishnu Prakash <jprakash@...eaurora.org> wrote:
>
>> Add documentation for PMIC7 ADC peripheral. For PMIC7 ADC, all SW
>> communication to ADC goes through PMK8350, which communicates with
>> other PMICs through PBS.
>>
>> Signed-off-by: Jishnu Prakash <jprakash@...eaurora.org>
>> ---
>>   .../bindings/iio/adc/qcom,spmi-vadc.yaml           | 28 ++++++++++++++++------
>>   1 file changed, 21 insertions(+), 7 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
>> index 72db14c..20f010c 100644
>> --- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
>> +++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
>> @@ -13,7 +13,7 @@ maintainers:
>>   description: |
>>     SPMI PMIC voltage ADC (VADC) provides interface to clients to read
>>     voltage. The VADC is a 15-bit sigma-delta ADC.
>> -  SPMI PMIC5 voltage ADC (ADC) provides interface to clients to read
>> +  SPMI PMIC5/PMIC7 voltage ADC (ADC) provides interface to clients to read
>>     voltage. The VADC is a 16-bit sigma-delta ADC.
>>   
>>   properties:
>> @@ -23,6 +23,7 @@ properties:
>>         - qcom,spmi-adc5
>>         - qcom,spmi-adc-rev2
>>         - qcom,pms405-adc
>> +      - qcom,spmi-adc7
>>   
>>     reg:
>>       description: VADC base address in the SPMI PMIC register map
>> @@ -65,6 +66,8 @@ patternProperties:
>>           description: |
>>             ADC channel number.
>>             See include/dt-bindings/iio/qcom,spmi-vadc.h
>> +          For PMIC7 ADC, the channel numbers are specified separately per PMIC
>> +          in the PMIC-specific files in include/dt-bindings/iio/.
> That makes me thing we really should have separate compatibles.  The
> parts clearly have differences, even if we haven't needed to use them
> explicitly as yet.
I'm not sure what you mean by this. We have added a new compatible 
property "qcom,spmi-adc7" for PMIC7 ADC.
>
>>   
>>         label:
>>           description: |
>> @@ -72,7 +75,7 @@ patternProperties:
>>               For thermistor inputs connected to generic AMUX or GPIO inputs
>>               these can vary across platform for the same pins. Hence select
>>               the platform schematics name for this channel. It is required
>> -            for "qcom,spmi-adc5" and "qcom,spmi-adc-rev2".
>> +            for "qcom,spmi-adc5", "qcom,spmi-adc7" and "qcom,spmi-adc-rev2".
>>           allOf:
>>             - $ref: /schemas/types.yaml#/definitions/string
>>   
>>