linux-kernel - [PATCH v2] cpufreq: tegra186: Share policy per cluster

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Message-Id: <20250310-cpufreq-t186-share-policy-v2-1-d0b743cd051f@gmail.com>
Date: Mon, 10 Mar 2025 00:28:48 -0500
From: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@...nel.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Viresh Kumar <viresh.kumar@...aro.org>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>
Cc: linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Aaron Kling <luceoscutum@...il.com>, 
 Sumit Gupta <sumitg@...dia.com>, Thierry Reding <treding@...dia.com>, 
 Aaron Kling <webgeek1234@...il.com>
Subject: [PATCH v2] cpufreq: tegra186: Share policy per cluster

From: Aaron Kling <luceoscutum@...il.com>

This functionally brings tegra186 in line with tegra210 and tegra194,
sharing a cpufreq policy between all cores in a cluster.

Reviewed-by: Sumit Gupta <sumitg@...dia.com>
Acked-by: Thierry Reding <treding@...dia.com>
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 c7761eb99f3ccc3e85389cb1e79d338c47584ae3..92aa50f0166601e7b077a4127eba0cb60181dee3 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 < ARRAY_SIZE(tegra186_cpus); cpu++) {
+		if (data->cpus[cpu].bpmp_cluster_id == cluster)
+			cpumask_set_cpu(cpu, policy->cpus);
+	}
+
 	return 0;
 }

---
base-commit: 1110ce6a1e34fe1fdc1bfe4ad52405f327d5083b
change-id: 20250310-cpufreq-t186-share-policy-a27652838532

Best regards,
-- 
Aaron Kling <webgeek1234@...il.com>