Devicetree

* Re: [PATCH v2 1/6] soc: qcom: rpmpd: Add a powerdomain driver to model corners
From: Rajendra Nayak @ 2018-05-31  4:20 UTC (permalink / raw)
  To: Ulf Hansson
  Cc: Viresh Kumar, Stephen Boyd, Andy Gross, devicetree, linux-arm-msm,
	Linux Kernel Mailing List, collinsd
In-Reply-To: <CAPDyKFpuZ4s7C+Nr3NhU-A40oVw84yK7eEniO6NhHNJ3VosR-A@mail.gmail.com>

On 05/30/2018 06:14 PM, Ulf Hansson wrote:
> [...]
> 
>>>> +
>>>> +static DEFINE_MUTEX(rpmpd_lock);
>>>> +
>>>> +/* msm8996 RPM powerdomains */
>>>> +DEFINE_RPMPD_CORN_SMPA(msm8996, vddcx, vddcx_ao, 1);
>>>> +DEFINE_RPMPD_CORN_SMPA(msm8996, vddmx, vddmx_ao, 2);
>>>> +DEFINE_RPMPD_CORN_LDOA(msm8996, vddsscx, 26);
>>>> +
>>>> +DEFINE_RPMPD_VFC_SMPA(msm8996, vddcx_vfc, 1);
>>>> +DEFINE_RPMPD_VFC_LDOA(msm8996, vddsscx_vfc, 26);
>>>> +
>>>> +static struct rpmpd *msm8996_rpmpds[] = {
>>>> +       [0] = &msm8996_vddcx,
>>>> +       [1] = &msm8996_vddcx_ao,
>>>> +       [2] = &msm8996_vddcx_vfc,
>>>> +       [3] = &msm8996_vddmx,
>>>> +       [4] = &msm8996_vddmx_ao,
>>>> +       [5] = &msm8996_vddsscx,
>>>> +       [6] = &msm8996_vddsscx_vfc,
>>>> +};
>>>
>>> It's not my call, but honestly the above all macros makes the code
>>> less readable.
>>
>> This is all static data per SoC. The macros will keep the new additions
>> needed for every new SoC to a minimal. Currently this supports only
>> msm8996.
> 
> Right, that's fine then.
> 
>>
>>>
>>> Anyway, I think you should convert to allocate these structs
>>> dynamically from the heap (kzalloc/kcalloc), instead of statically as
>>> above.
> 
> However, I assume this is still doable!?

Perhaps it is, but is there any specific advantage of constructing these structures
dynamically vs statically, given they are static data?
Most other powerdomain/clock/regulator drivers I see do it statically, and thats
what I followed.

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation

^ permalink raw reply