[PATCH 5/5] devfreq: exynos5: Use devm_devfreq_* function using device resource management

[Sachin Kamat]

Hi Chanwoo,

On 25 April 2014 14:38, Chanwoo Choi <cw00.choi at samsung.com> wrote:
> This patch uses devm_devfreq_add_device()/devm_devfreq_register_opp_notifier()
> to control automatically the resource of devfreq.
>
> Signed-off-by: Chanwoo Choi <cw00.choi at samsung.com>
> Cc: Kukjin Kim <kgene.kim at samsung.com>
> Cc: Sachin Kamat <sachin.kamat at linaro.org>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie at samsung.com>
> Cc: Manish Badarkhe <badarkhe.manish at gmail.com>
> Cc: Abhilash Kesavan <a.kesavan at samsung.com>
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-samsung-soc at vger.kernel.org
> ---
>  drivers/devfreq/exynos/exynos5_bus.c | 23 ++++++++---------------
>  1 file changed, 8 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/devfreq/exynos/exynos5_bus.c b/drivers/devfreq/exynos/exynos5_bus.c
> index ab54a69..1f622f8 100644
> --- a/drivers/devfreq/exynos/exynos5_bus.c
> +++ b/drivers/devfreq/exynos/exynos5_bus.c
> @@ -165,11 +165,6 @@ static int exynos5_int_get_dev_status(struct device *dev,
>  }
>  static void exynos5_int_exit(struct device *dev)
>  {
> -       struct platform_device *pdev = container_of(dev, struct platform_device,
> -                                                   dev);
> -       struct busfreq_data_int *data = platform_get_drvdata(pdev);
> -
> -       devfreq_unregister_opp_notifier(dev, data->devfreq);
>  }

Do you need an empty function?

>
>  static struct devfreq_dev_profile exynos5_devfreq_int_profile = {
> @@ -343,30 +338,29 @@ static int exynos5_busfreq_int_probe(struct platform_device *pdev)
>
>         busfreq_mon_reset(ppmu_data);
>
> -       data->devfreq = devfreq_add_device(dev, &exynos5_devfreq_int_profile,
> +       data->devfreq = devm_devfreq_add_device(dev, &exynos5_devfreq_int_profile,
>                                            "simple_ondemand", NULL);
> -
>         if (IS_ERR(data->devfreq)) {
>                 err = PTR_ERR(data->devfreq);

No need of err.   return PTR_ERR(data->devfreq);

> -               goto err_devfreq_add;
> +               return err;
>         }
>
> -       devfreq_register_opp_notifier(dev, data->devfreq);
> +       err = devm_devfreq_register_opp_notifier(dev, data->devfreq);
> +       if (err < 0) {
> +               dev_err(dev, "Failed to register opp notifier\n");
> +               return err;
> +       }
>
>         err = register_pm_notifier(&data->pm_notifier);
>         if (err) {
>                 dev_err(dev, "Failed to setup pm notifier\n");
> -               goto err_devfreq_add;
> +               return err;
>         }
>
>         /* TODO: Add a new QOS class for int/mif bus */
>         pm_qos_add_request(&data->int_req, PM_QOS_NETWORK_THROUGHPUT, -1);
>
>         return 0;
> -
> -err_devfreq_add:
> -       devfreq_remove_device(data->devfreq);
> -       return err;
>  }
>
>  static int exynos5_busfreq_int_remove(struct platform_device *pdev)
> @@ -375,7 +369,6 @@ static int exynos5_busfreq_int_remove(struct platform_device *pdev)
>
>         pm_qos_remove_request(&data->int_req);
>         unregister_pm_notifier(&data->pm_notifier);
> -       devfreq_remove_device(data->devfreq);
>
>         return 0;
>  }
> --
> 1.8.0
>



-- 
With warm regards,
Sachin