linux-kernel - Re: [PATCH V2 11/13] devfreq: tegra30: Migrate to dev_pm_opp_set

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Message-ID: <20210127100234.vl2wwe7rjrrz4btz@vireshk-i7>
Date:   Wed, 27 Jan 2021 15:32:34 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>
Cc:     linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 11/13] devfreq: tegra30: Migrate to
 dev_pm_opp_set_opp()

On 27-01-21, 14:40, Viresh Kumar wrote:
> dev_pm_opp_set_bw() is getting removed and dev_pm_opp_set_opp() should
> be used instead. Migrate to the new API.
> 
> We don't want the OPP core to manage the clk for this driver, migrate to
> dev_pm_opp_of_add_table_noclk() to make sure dev_pm_opp_set_opp()
> doesn't have any side effects.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
> Dmitry,
> 
> This is based over the patches sent here:
> 
> https://lore.kernel.org/lkml/6c2160ff30a8f421563793020264cf9f533f293c.1611738228.git.viresh.kumar@linaro.org/
> 
> This should fix the problem you mentioned earlier. Will push this for
> linux-next unless you have any issues with it.
> 
>  drivers/devfreq/tegra30-devfreq.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
> index 117cad7968ab..31f7dec5990b 100644
> --- a/drivers/devfreq/tegra30-devfreq.c
> +++ b/drivers/devfreq/tegra30-devfreq.c
> @@ -647,7 +647,7 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
>  		return PTR_ERR(opp);
>  	}
>  
> -	ret = dev_pm_opp_set_bw(dev, opp);
> +	ret = dev_pm_opp_set_opp(dev, opp);
>  	dev_pm_opp_put(opp);
>  
>  	return ret;
> @@ -849,7 +849,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
>  		return err;
>  	}
>  
> -	err = dev_pm_opp_of_add_table(&pdev->dev);
> +	err = dev_pm_opp_of_add_table_noclk(&pdev->dev);

Plus this, somehow was left uncommited in my tree :(

diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index 31f7dec5990b..ce83f883ca65 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -849,7 +849,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
                return err;
        }
 
-       err = dev_pm_opp_of_add_table_noclk(&pdev->dev);
+       err = dev_pm_opp_of_add_table_noclk(&pdev->dev, 0);
        if (err) {
                dev_err(&pdev->dev, "Failed to add OPP table: %d\n", err);
                goto put_hw;

-- 
viresh