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Message-ID: <e88d9482-4858-7042-7148-142ed9ebb6ad@quicinc.com>
Date:   Wed, 22 Mar 2023 19:16:46 +0530
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Subject: Re: [PATCH V1 2/4] dt-bindings: soc: qcom,mpm-sleep-counter: Add the
 dtschema
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To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Rob Herring <robh+dt@kernel.org>
CC:     <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
        <devicetree@vger.kernel.org>, Sibi Sankar <quic_sibis@quicinc.com>,
        Rajendra Nayak <quic_rjendra@quicinc.com>
References: <cover.1679403696.git.quic_schowdhu@quicinc.com>
 <576e53a1d0ef218536da976102b4cc207436ec1d.1679403696.git.quic_schowdhu@quicinc.com>
 <fc46c48d-2de0-ba3a-08b0-a09526bd9e26@linaro.org>
From:   Souradeep Chowdhury <quic_schowdhu@quicinc.com>
In-Reply-To: <fc46c48d-2de0-ba3a-08b0-a09526bd9e26@linaro.org>
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On 3/21/2023 11:03 PM, Krzysztof Kozlowski wrote:
> On 21/03/2023 14:51, Souradeep Chowdhury wrote:
>> Add the device tree bindings for the module power manager sleep
>> counter.
>>
>> Signed-off-by: Souradeep Chowdhury <quic_schowdhu@quicinc.com>
>> ---
>>   .../bindings/soc/qcom/qcom,mpm-sleep-counter.yaml  | 40 ++++++++++++++++++++++
>>   1 file changed, 40 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml
>> new file mode 100644
>> index 0000000..f9f46b7
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,mpm-sleep-counter.yaml
>> @@ -0,0 +1,40 @@
>> +# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/soc/qcom/qcom,mpm-sleep-counter.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: MPM Sleep Counter
>> +
>> +maintainers:
>> +  - Souradeep Chowdhury <quic_schowdhu@quicinc.com>
>> +
>> +description: |
>> +    MPM(Module Power Manager) has a sleep counter which is used to track
> 
> Missing space:
> MPM (Module
> 

Ack
>> +    various stages of the boot process in Qualcomm.
> 
> in Qualcomm SoC. Because you do not track it in the company...
> 

Ack
>> +
>> +properties:
>> +  compatible:
>> +    items:
> 
> Drop items.
> 

Ack
>> +      - const: qcom,mpm2-sleep-counter
> 
> SoC specific compatible.
> 

This is a generic Module Power Manager Sleep Counter which is present in 
all Qcom Socs, so SoC specific compatible is not given here.

>> +
>> +  reg:
>> +    items:
>> +      - description: MPM Sleep Counter Base
> 
> just maxItems: 1
> 

Ack
>> +
>> +  clock-frequency:
>> +    description: Frequency for the sleep counter
> 
> Since this does not have clocks, what frequency you are setting here?

Module Power Manager(MPM) Sleep Counter is a clock that starts ticking 
from Primary Boot Loader(PBL) Stage. This is usually a 32 Khz clock and 
the frequency for the same is stored here.

> 
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    mpm2-sleep-counter@c221000{
> 
> Node names should be generic.
> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

Ack
> 
>> +       compatible = "qcom,mpm2-sleep-counter";
>> +       reg = <0xc221000 0x1000>;
>> +       clock-frequency = <32768>;
>> +    };
> 
> Best regards,
> Krzysztof
>