linux-kernel - Re: [PATCH 0/2] cpufreq/opp: rework regulator initialization

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Message-ID: <f9f54181-f7bc-6add-2c06-2ed3d6410d01@samsung.com>
Date:   Mon, 11 Feb 2019 13:22:24 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Dave Gerlach <d-gerlach@...com>,
        Wolfram Sang <wsa@...-dreams.de>, Sudeep.Holla@....com
Subject: Re: [PATCH 0/2] cpufreq/opp: rework regulator initialization

Hi Viresh,

On 2019-02-11 10:55, Viresh Kumar wrote:
> On 11-02-19, 10:52, Marek Szyprowski wrote:
>> On 2019-02-11 09:44, Viresh Kumar wrote:
>>> On 07-02-19, 13:22, Marek Szyprowski wrote:
>>>> Dear All,
>>>>
>>>> Recent commit 9ac6cb5fbb17 ("i2c: add suspended flag and accessors for
>>>> i2c adapters") added a visible warning for an attempt to do i2c transfer
>>>> over a suspended i2c bus. This revealed a long standing issue in the
>>>> cpufreq-dt driver, which gives a following warning during system
>>>> suspend/resume cycle:
>>> Marek,
>>>
>>> I have sent a patchset which is not directly related to the problem
>>> you are facing, but it may solve your problem as a side effect. Can
>>> you please see if that works to solve this issue as well ?
>>>
>>> https://lore.kernel.org/lkml/cover.1549874368.git.viresh.kumar@linaro.org/T/#u
>> Thanks for the patch. It indeed solves the problem of the i2c transfer
>> in cpu hotplug procedure during system resume, although my resources
>> management rewrite is still valid as a way to fix remaining 'todos' in
>> the cpufreq-dt driver.
> Which remaining todos are you talking about ? Sorry I am not able to
> recall :(

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/cpufreq/cpufreq-dt.c#n347

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland