linux-kernel - Re: [PATCH v4 2/4] OPP: change parameter to device pointer in dev_pm_opp_of_register

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Message-ID: <20200313101524.GA150397@google.com>
Date:   Fri, 13 Mar 2020 10:15:24 +0000
From:   Quentin Perret <qperret@...gle.com>
To:     Lukasz Luba <lukasz.luba@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
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Subject: Re: [PATCH v4 2/4] OPP: change parameter to device pointer in
 dev_pm_opp_of_register_em()

On Monday 09 Mar 2020 at 13:41:15 (+0000), Lukasz Luba wrote:
> diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
> index d2b5f062a07b..676b56424886 100644
> --- a/drivers/cpufreq/cpufreq-dt.c
> +++ b/drivers/cpufreq/cpufreq-dt.c
> @@ -275,7 +275,9 @@ static int cpufreq_init(struct cpufreq_policy *policy)
>  	policy->cpuinfo.transition_latency = transition_latency;
>  	policy->dvfs_possible_from_any_cpu = true;
>  
> -	dev_pm_opp_of_register_em(policy->cpus);
> +	ret = dev_pm_opp_of_register_em(cpu_dev, policy->cpus);
> +	if (ret)
> +		dev_dbg(cpu_dev, "Couldn't register Energy Model %d\n", ret);
>  
>  	return 0;

Ah, that answers my comment on patch 01. You're adding the error
messages here.

Isn't this more boilerplate for the drivers ? All they do is print the
same debug message. Maybe just move it inside dev_pm_opp_of_register_em
directly ?

Thanks,
Quentin