Re: [PATCH 2/3] clk: qcom: gcc-sm8150: Add gcc_parents_0_ao support

["Satya Priya Kakitapalli (Temp)" <quic_skakitap@quicinc.com>]

On 1/25/2024 3:25 PM, Konrad Dybcio wrote:
>
>
> On 1/25/24 06:49, Satya Priya Kakitapalli (Temp) wrote:
>>
>> On 1/23/2024 11:17 PM, Konrad Dybcio wrote:
>>>
>>>
>>> On 1/23/24 17:34, Satya Priya Kakitapalli wrote:
>>>> Add active_only support for gcc_parents_0, this is needed because
>>>> some of the clocks under it are critical which would vote on xo
>>>> blocking the suspend.
>>>>
>>>> Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@quicinc.com>
>>>> ---
>>>
>>> Is there a need to keep gcc_cpuss_ahb_clk_src around? Do we do any
>>> ratesetting on it? Should we ever turn it off?
>>>
>>
>> The branch clocks under gcc_cpuss_ahb_clk_src are critical clocks, 
>> which are running at 19.2Mhz causing vote on XO during suspend. As of 
>> now no rate setting is happening but this rcg is useful to get the 
>> exact rates from debugfs. Hence this change is needed to avoid XO 
>> shutdown issues.
>
> So, if I underderstood you correctly, this clock serves no purpose other
> than getting rate?
>
> In this case, I'd say we should de-register it from the clock driver and
> use debugcc [1] (contributions welcome!) for precise measurements.
>

Although currently there is no rate-setting happening now, its better to 
keep the rcg modelling as is, considering that it might be needed if 
some use case arises in future.