linux-kernel - Re: [PATCH] cpufreq: tegra186: Share policy per cluster

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Message-ID: <CALHNRZ-YpkSmLipQJ6i8XR+R-4ReLp1fd=jx0X1V8vDvuPG-gA@mail.gmail.com>
Date: Mon, 10 Mar 2025 00:08:41 -0500
From: Aaron Kling <webgeek1234@...il.com>
To: Viresh Kumar <viresh.kumar@...aro.org>
Cc: Aaron Kling <luceoscutum@...il.com>, "Rafael J. Wysocki" <rafael@...nel.org>, 
	Thierry Reding <thierry.reding@...il.com>, Jonathan Hunter <jonathanh@...dia.com>, 
	linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: tegra186: Share policy per cluster

On Sun, Mar 9, 2025 at 11:45 PM Viresh Kumar <viresh.kumar@...aro.org> wrote:
>
> On 16-02-25, 10:08, Aaron Kling wrote:
> > This functionally brings tegra186 in line with tegra210 and tegra194,
> > sharing a cpufreq policy between all cores in a cluster.
> >
> > Signed-off-by: Aaron Kling <webgeek1234@...il.com>
> > ---
> >  drivers/cpufreq/tegra186-cpufreq.c | 7 +++++++
> >  1 file changed, 7 insertions(+)
> >
> > diff --git a/drivers/cpufreq/tegra186-cpufreq.c b/drivers/cpufreq/tegra186-cpufreq.c
> > index c7761eb99f3cc..c832a1270e688 100644
> > --- a/drivers/cpufreq/tegra186-cpufreq.c
> > +++ b/drivers/cpufreq/tegra186-cpufreq.c
> > @@ -73,11 +73,18 @@ static int tegra186_cpufreq_init(struct cpufreq_policy *policy)
> >  {
> >       struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
> >       unsigned int cluster = data->cpus[policy->cpu].bpmp_cluster_id;
> > +     u32 cpu;
> >
> >       policy->freq_table = data->clusters[cluster].table;
> >       policy->cpuinfo.transition_latency = 300 * 1000;
> >       policy->driver_data = NULL;
> >
> > +     /* set same policy for all cpus in a cluster */
> > +     for (cpu = 0; cpu < (sizeof(tegra186_cpus)/sizeof(struct tegra186_cpufreq_cpu)); cpu++) {
>
> Can't you use ARRAY_SIZE here ?

I could, just wasn't aware of that macro. Is that enough to send a v2 over?
>
> > +             if (data->cpus[cpu].bpmp_cluster_id == cluster)
> > +                     cpumask_set_cpu(cpu, policy->cpus);
> > +     }
> > +
> >       return 0;
>
> --
> viresh

Sincerely,
Aaron