linux-kernel - Re: [PATCH 2/2] soc: qcom: socinfo: Add sysfs attributes for fields in v2-v6

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Message-ID: <1d31a521-f5c6-48f0-1202-2f19919bca6b@quicinc.com>
Date:   Thu, 19 Jan 2023 15:05:25 +0530
From:   Naman Jain <quic_namajain@...cinc.com>
To:     Trilok Soni <quic_tsoni@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Andy Gross" <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_pkondeti@...cinc.com>
Subject: Re: [PATCH 2/2] soc: qcom: socinfo: Add sysfs attributes for fields
 in v2-v6

Hi Trilok,

On 1/12/2023 5:28 AM, Trilok Soni wrote:
> On 1/11/2023 3:19 PM, Dmitry Baryshkov wrote:
>> On 11/01/2023 10:21, Naman Jain wrote:
>>> Add support in sysfs custom attributes for fields in socinfo version
>>> v2-v6. This is to support SoC based operations in userland scripts
>>> and test scripts. Also, add name mappings for hw-platform type to
>>> make the sysfs information more descriptive.
>>
>> Please include a patch documenting your additions to 
>> Documentation/ABI/testing/sysfs-devices-soc. Please describe usecases 
>> for new attributes and their applicability to non-Qualcomm boards.
>>
>> Note, that testing scripts can access debugfs entries without any 
>> issues.
>
> The commit text mentions the "userland" scripts and it could mean the 
> product OS like Android or Yocto having the applications using these 
> /sysfs entries. Naman, please clarify if the vendor application layer 
> in the Android is using these Entries to make decisions based on the 
> platforms / soc information?


That may have been a wrong choice of word here, if that is what it 
means. The use of these interfaces is in post boot shell scripts, and 
userspace services. As these are Qualcomm specific, I don't think we 
have any examples in Android. I have now mentioned the use-cases of 
sysfs interface, in my reply on Dmitry's email on PATCH 2/2. Have added 
you there to avoid duplication.


>
> ---Trilok Soni


Thanks,

Naman Jain