linux-kernel - Re: [PATCH v4 8/9] cpufreq: scmi: Use auto-registration of thermal cooling device

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Message-ID: <49b6cb24-6f38-750d-e652-cc4e47f96db0@linaro.org>
Date:   Mon, 28 Jan 2019 09:39:19 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Amit Kucheria <amit.kucheria@...aro.org>,
        linux-kernel@...r.kernel.org
Cc:     linux-arm-msm@...r.kernel.org, viresh.kumar@...aro.org,
        edubezval@...il.com, swboyd@...omium.org, dianders@...omium.org,
        mka@...omium.org, Sudeep Holla <sudeep.holla@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v4 8/9] cpufreq: scmi: Use auto-registration of thermal
 cooling device

On 28/01/2019 07:41, Amit Kucheria wrote:
> Use the CPUFREQ_AUTO_REGISTER_COOLING_DEV flag to allow cpufreq core to
> automatically register as a thermal cooling device.
> 
> This allows removal of boiler plate code from the driver.
> 
> Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
> Acked-by: Sudeep Holla <sudeep.holla@....com>

Reviewed-by: Daniel Lezcano <daniel.lezcano@...aro.org>

> ---
>  drivers/cpufreq/scmi-cpufreq.c | 14 ++------------
>  1 file changed, 2 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
> index 242c3370544e..b19e9d129f8f 100644
> --- a/drivers/cpufreq/scmi-cpufreq.c
> +++ b/drivers/cpufreq/scmi-cpufreq.c
> @@ -11,7 +11,6 @@
>  #include <linux/cpu.h>
>  #include <linux/cpufreq.h>
>  #include <linux/cpumask.h>
> -#include <linux/cpu_cooling.h>
>  #include <linux/export.h>
>  #include <linux/module.h>
>  #include <linux/pm_opp.h>
> @@ -22,7 +21,6 @@
>  struct scmi_data {
>  	int domain_id;
>  	struct device *cpu_dev;
> -	struct thermal_cooling_device *cdev;
>  };
>  
>  static const struct scmi_handle *handle;
> @@ -185,7 +183,6 @@ static int scmi_cpufreq_exit(struct cpufreq_policy *policy)
>  {
>  	struct scmi_data *priv = policy->driver_data;
>  
> -	cpufreq_cooling_unregister(priv->cdev);
>  	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
>  	kfree(priv);
>  	dev_pm_opp_remove_all_dynamic(priv->cpu_dev);
> @@ -193,17 +190,11 @@ static int scmi_cpufreq_exit(struct cpufreq_policy *policy)
>  	return 0;
>  }
>  
> -static void scmi_cpufreq_ready(struct cpufreq_policy *policy)
> -{
> -	struct scmi_data *priv = policy->driver_data;
> -
> -	priv->cdev = of_cpufreq_cooling_register(policy);
> -}
> -
>  static struct cpufreq_driver scmi_cpufreq_driver = {
>  	.name	= "scmi",
>  	.flags	= CPUFREQ_STICKY | CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
> -		  CPUFREQ_NEED_INITIAL_FREQ_CHECK,
> +		  CPUFREQ_NEED_INITIAL_FREQ_CHECK |
> +		  CPUFREQ_AUTO_REGISTER_COOLING_DEV,
>  	.verify	= cpufreq_generic_frequency_table_verify,
>  	.attr	= cpufreq_generic_attr,
>  	.target_index	= scmi_cpufreq_set_target,
> @@ -211,7 +202,6 @@ static struct cpufreq_driver scmi_cpufreq_driver = {
>  	.get	= scmi_cpufreq_get_rate,
>  	.init	= scmi_cpufreq_init,
>  	.exit	= scmi_cpufreq_exit,
> -	.ready	= scmi_cpufreq_ready,
>  };
>  
>  static int scmi_cpufreq_probe(struct scmi_device *sdev)
> 


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