linux-kernel - Re: [PATCH] cpufreq: dt-platdev: Add devices covered by ti-cpufreq to blacklist

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Date:   Tue, 19 Sep 2017 10:08:00 -0500
From:   Dave Gerlach <d-gerlach@...com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
CC:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        Tony Lindgren <tony@...mide.com>
Subject: Re: [PATCH] cpufreq: dt-platdev: Add devices covered by ti-cpufreq to
 blacklist

On 09/19/2017 10:02 AM, Viresh Kumar wrote:
> On 19 September 2017 at 07:57, Dave Gerlach <d-gerlach@...com> wrote:
>> Commit edeec420de24 ("cpufreq: dt-platdev: Automatically create cpufreq
>> device with OPP v2") causes a cpufreq-dt platform device to be
>> automatically created for any platform with an OPP v2 node defined.
>> However, ti-cpufreq registers the cpufreq-dt platdev at the end of probe
>> in order to ensure the ti-cpufreq driver probes first and provides the
>> necessary opp-supported-hw for cpufreq-dt. With this new patch now a
>> dupluicate cpufreq-dt is created, which we do not want. To avoid this,
>> add the platforms handled by ti-cpufreq to the blacklist provided in the
>> aforementioned commit to allow ti-cpufreq to continue creating the
>> cpufreq-dt platdev.
>>
>> This applies to am335x, am437x, dra7xx, and am57xx.
>>
>> Fixes: edeec420de24 ("cpufreq: dt-cpufreq: platdev Automatically create device with OPP v2")
>> Signed-off-by: Dave Gerlach <d-gerlach@...com>
>> ---
>>  drivers/cpufreq/cpufreq-dt-platdev.c | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
>> index a020da7940d6..c6f554ba9bb3 100644
>> --- a/drivers/cpufreq/cpufreq-dt-platdev.c
>> +++ b/drivers/cpufreq/cpufreq-dt-platdev.c
>> @@ -106,6 +106,10 @@ static const struct of_device_id whitelist[] __initconst = {
>>   * platforms using "operating-points-v2" property.
>>   */
>>  static const struct of_device_id blacklist[] __initconst = {
>> +       { .compatible = "ti,am33xx", },
>> +       { .compatible = "ti,am43", },
>> +       { .compatible = "ti,dra7", },
>> +
>>         { }
>>  };
> 
> Perhaps you should ask Sunil to improve his patch.
> 
> https://marc.info/?l=linux-kernel&m=150576233031387&w=2
> 

Ah, did not see that. Somebody added me to a thread last week about this and I
just got around to making a fix now, I will jump on to that thread thanks.

Regards,
Dave