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

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Date:   Mon, 28 Jan 2019 09:40:38 +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 9/9] cpufreq: scpi: 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/scpi-cpufreq.c | 14 ++------------
>  1 file changed, 2 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
> index 99449738faa4..82420e8e5f0d 100644
> --- a/drivers/cpufreq/scpi-cpufreq.c
> +++ b/drivers/cpufreq/scpi-cpufreq.c
> @@ -22,7 +22,6 @@
>  #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/of_platform.h>
> @@ -34,7 +33,6 @@
>  struct scpi_data {
>  	struct clk *clk;
>  	struct device *cpu_dev;
> -	struct thermal_cooling_device *cdev;
>  };
>  
>  static struct scpi_ops *scpi_ops;
> @@ -186,7 +184,6 @@ static int scpi_cpufreq_exit(struct cpufreq_policy *policy)
>  {
>  	struct scpi_data *priv = policy->driver_data;
>  
> -	cpufreq_cooling_unregister(priv->cdev);
>  	clk_put(priv->clk);
>  	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
>  	kfree(priv);
> @@ -195,23 +192,16 @@ static int scpi_cpufreq_exit(struct cpufreq_policy *policy)
>  	return 0;
>  }
>  
> -static void scpi_cpufreq_ready(struct cpufreq_policy *policy)
> -{
> -	struct scpi_data *priv = policy->driver_data;
> -
> -	priv->cdev = of_cpufreq_cooling_register(policy);
> -}
> -
>  static struct cpufreq_driver scpi_cpufreq_driver = {
>  	.name	= "scpi-cpufreq",
>  	.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,
>  	.get	= scpi_cpufreq_get_rate,
>  	.init	= scpi_cpufreq_init,
>  	.exit	= scpi_cpufreq_exit,
> -	.ready	= scpi_cpufreq_ready,
>  	.target_index	= scpi_cpufreq_set_target,
>  };
>  
> 


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