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

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Message-ID: <20250303100306.rwaosbumr7omcqce@vireshk-i7>
Date: Mon, 3 Mar 2025 15:33:06 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Aaron Kling <luceoscutum@...il.com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Aaron Kling <webgeek1234@...il.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 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++) {
> +		if (data->cpus[cpu].bpmp_cluster_id == cluster)
> +			cpumask_set_cpu(cpu, policy->cpus);
> +	}
> +
>  	return 0;
>  }

Thierry / Jonathan,

Any inputs on this ?

-- 
viresh