Re: [PATCH v1 17/30] mmc: sdhci-tegra: Support OPP and core voltage scaling

Dmitry Osipenko
2020-11-09T05:09:06Z

09.11.2020 08:00, Viresh Kumar пишет:
> On 06-11-20, 21:41, Frank Lee wrote:
>> On Fri, Nov 6, 2020 at 9:18 PM Dmitry Osipenko <digetx@gmail.com> wrote:
>>>
>>> 06.11.2020 09:15, Viresh Kumar пишет:
>>>> Setting regulators for count as 0 doesn't sound good to me.
>>>>
>>>> But, I understand that you don't want to have that if (have_regulator)
>>>> check, and it is a fair request. What I will instead do is, allow all
>>>> dev_pm_opp_put*() API to start accepting a NULL pointer for the OPP
>>>> table and fail silently. And so you won't be required to have this
>>>> unwanted check. But you will be required to save the pointer returned
>>>> back by dev_pm_opp_set_regulators(), which is the right thing to do
>>>> anyways.
>>>
>>> Perhaps even a better variant could be to add a devm versions of the OPP
>>> API functions, then drivers won't need to care about storing the
>>> opp_table pointer if it's unused by drivers.
>>
>> I think so. The consumer may not be so concerned about the status of
>> these OPP tables.
>> If the driver needs to manage the release, it needs to add a pointer
>> to their driver global structure.
>>
>> Maybe it's worth having these devm interfaces for opp.
>
> Sure if there are enough users of this, I am all for it. I was fine
> with the patches you sent, just that there were not a lot of users of
> it and so I pushed them back. If we find that we have more users of it
> now, we can surely get that back.
>

There was already attempt to add the devm? Could you please give me a
link to the patches?

I already prepared a patch which adds the devm helpers. It helps to keep
code cleaner and readable.