linux-kernel - Re: [PATCH v6 51/52] PM / devfreq: tegra30: Support interconnect and OPPs from device-tree

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Message-ID: <5f5a22b1-4d01-5698-1bca-6bcc66c55e6f@gmail.com>
Date:   Sun, 1 Nov 2020 18:49:16 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     cwchoi00@...il.com
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Mikko Perttunen <cyndis@...si.fi>,
        Viresh Kumar <vireshk@...nel.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-tegra@...r.kernel.org,
        Linux PM list <linux-pm@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree <devicetree@...r.kernel.org>
Subject: Re: [PATCH v6 51/52] PM / devfreq: tegra30: Support interconnect and
 OPPs from device-tree

01.11.2020 18:44, Chanwoo Choi пишет:
>> OPP core will try to grab the clock reference for the table and it may
>> cause EPROBE_DEFER. Although, it shouldn't happen here because we have
>> devm_clk_get() before the get_opp_table(), hence seems the deferred
>> probe indeed shouldn't happen in this case.
> It is my missing point. If there, you're right.
> Could you provide the code point to check the clock reference on the OPP core?

Please see it here:

https://elixir.bootlin.com/linux/v5.10-rc1/source/drivers/opp/core.c#L1101