linux-kernel - Re: [PATCH 7/8] cpufreq: scpi: Use auto-registration for energy model

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Date:   Tue, 10 Aug 2021 11:27:38 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Rafael Wysocki <rjw@...ysocki.net>,
        Vincent Donnefort <vincent.donnefort@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Cristian Marussi <cristian.marussi@....com>,
        linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/8] cpufreq: scpi: Use auto-registration for energy model



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@...aro.org>
> ---
>   drivers/cpufreq/scpi-cpufreq.c | 5 ++---
>   1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
> index d6a698a1b5d1..bc8c62b1beb5 100644
> --- a/drivers/cpufreq/scpi-cpufreq.c
> +++ b/drivers/cpufreq/scpi-cpufreq.c
> @@ -163,8 +163,6 @@ static int scpi_cpufreq_init(struct cpufreq_policy *policy)
>   
>   	policy->fast_switch_possible = false;
>   
> -	dev_pm_opp_of_register_em(cpu_dev, policy->cpus);
> -
>   	return 0;
>   
>   out_free_cpufreq_table:
> @@ -193,7 +191,8 @@ static struct cpufreq_driver scpi_cpufreq_driver = {
>   	.name	= "scpi-cpufreq",
>   	.flags	= CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
>   		  CPUFREQ_NEED_INITIAL_FREQ_CHECK |
> -		  CPUFREQ_IS_COOLING_DEV,
> +		  CPUFREQ_IS_COOLING_DEV |
> +		  CPUFREQ_REGISTER_WITH_EM,
>   	.verify	= cpufreq_generic_frequency_table_verify,
>   	.attr	= cpufreq_generic_attr,
>   	.get	= scpi_cpufreq_get_rate,
> 

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