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Subject: Re: [PATCH 4/8] cpufreq: mediatek: Use auto-registration for energy
 model
To:     Viresh Kumar <viresh.kumar@linaro.org>
Cc:     Rafael Wysocki <rjw@rjwysocki.net>,
        Vincent Donnefort <vincent.donnefort@arm.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        linux-pm@vger.kernel.org,
        Vincent Guittot <vincent.guittot@linaro.org>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org
References: <cover.1628579170.git.viresh.kumar@linaro.org>
 <fe10f291210bfd16620f4be766e6647c8e577995.1628579170.git.viresh.kumar@linaro.org>
From:   Lukasz Luba <lukasz.luba@arm.com>
Message-ID: <12fc1e9d-bb74-63c2-7905-c0917df1cf5b@arm.com>
Date:   Tue, 10 Aug 2021 11:20:53 +0100
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On 8/10/21 8:36 AM, Viresh Kumar wrote:
> Use the CPUFREQ_REGISTER_WITH_EM flag to allow cpufreq core to
> automatically register with the energy model.
> 
> This allows removal of boiler plate code from the driver and fixes the
> unregistration part as well.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
>   drivers/cpufreq/mediatek-cpufreq.c | 5 ++---
>   1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
> index 87019d5a9547..4743f2e58b97 100644
> --- a/drivers/cpufreq/mediatek-cpufreq.c
> +++ b/drivers/cpufreq/mediatek-cpufreq.c
> @@ -448,8 +448,6 @@ static int mtk_cpufreq_init(struct cpufreq_policy *policy)
>   	policy->driver_data = info;
>   	policy->clk = info->cpu_clk;
>   
> -	dev_pm_opp_of_register_em(info->cpu_dev, policy->cpus);
> -
>   	return 0;
>   }
>   
> @@ -465,7 +463,8 @@ static int mtk_cpufreq_exit(struct cpufreq_policy *policy)
>   static struct cpufreq_driver mtk_cpufreq_driver = {
>   	.flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK |
>   		 CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
> -		 CPUFREQ_IS_COOLING_DEV,
> +		 CPUFREQ_IS_COOLING_DEV |
> +		 CPUFREQ_REGISTER_WITH_EM,
>   	.verify = cpufreq_generic_frequency_table_verify,
>   	.target_index = mtk_cpufreq_set_target,
>   	.get = cpufreq_generic_get,
> 

Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>