Re: [PATCH 26/31] PM / devfreq: tegra30: convert to use devm_pm_opp_* API

[Chanwoo Choi]

Hi,

On Sun, Jan 3, 2021 at 12:57 PM Yangtao Li <tiny.windzz@xxxxxxxxx> wrote:
>
> Use devm_pm_opp_* API to simplify code, and remove opp_table
> from tegra_devfreq.
>
> Signed-off-by: Yangtao Li <tiny.windzz@xxxxxxxxx>
> ---
>  drivers/devfreq/tegra30-devfreq.c | 21 +++++++--------------
>  1 file changed, 7 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
> index 117cad7968ab..4984cb91e9ea 100644
> --- a/drivers/devfreq/tegra30-devfreq.c
> +++ b/drivers/devfreq/tegra30-devfreq.c
> @@ -178,7 +178,6 @@ struct tegra_devfreq_soc_data {
>
>  struct tegra_devfreq {
>         struct devfreq          *devfreq;
> -       struct opp_table        *opp_table;
>
>         struct reset_control    *reset;
>         struct clk              *clock;
> @@ -794,6 +793,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
>         struct tegra_devfreq_device *dev;
>         struct tegra_devfreq *tegra;
>         struct devfreq *devfreq;
> +       struct opp_tabl *opp_table;

opp_tabl -> opp_table. It will make the build error. Please do build
test at least.

>         unsigned int i;
>         long rate;
>         int err;
> @@ -841,25 +841,25 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
>                 return err;
>         }
>
> -       tegra->opp_table = dev_pm_opp_set_supported_hw(&pdev->dev,
> -                                                      &hw_version, 1);
> -       err = PTR_ERR_OR_ZERO(tegra->opp_table);
> +       opp_table = devm_pm_opp_set_supported_hw(&pdev->dev,
> +                                                &hw_version, 1);
> +       err = PTR_ERR_OR_ZERO(opp_table);
>         if (err) {
>                 dev_err(&pdev->dev, "Failed to set supported HW: %d\n", err);
>                 return err;
>         }
>
> -       err = dev_pm_opp_of_add_table(&pdev->dev);
> +       err = devm_pm_opp_of_add_table(&pdev->dev);
>         if (err) {
>                 dev_err(&pdev->dev, "Failed to add OPP table: %d\n", err);
> -               goto put_hw;
> +               return err;
>         }
>
>         err = clk_prepare_enable(tegra->clock);
>         if (err) {
>                 dev_err(&pdev->dev,
>                         "Failed to prepare and enable ACTMON clock\n");
> -               goto remove_table;
> +               return err;
>         }
>
>         err = reset_control_reset(tegra->reset);
> @@ -917,10 +917,6 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
>         reset_control_reset(tegra->reset);
>  disable_clk:
>         clk_disable_unprepare(tegra->clock);
> -remove_table:
> -       dev_pm_opp_of_remove_table(&pdev->dev);
> -put_hw:
> -       dev_pm_opp_put_supported_hw(tegra->opp_table);

You might remove the 'devm_pm_opp_remove_all_dynamic(&pdev->dev)
under ' remove_opp' goto statement.kkkk


(snip)
-- 
Best Regards,
Chanwoo Choi