linux-kernel - [PATCH v2 2/2] cpufreq: Wire-up arch-flavored freq info into cpufreq_verify_current

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Message-Id: <20231127160838.1403404-3-beata.michalska@arm.com>
Date:   Mon, 27 Nov 2023 16:08:38 +0000
From:   Beata Michalska <beata.michalska@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pm@...r.kernel.org, sumitg@...dia.com
Cc:     sudeep.holla@....covm, will@...nel.org, catalin.marinas@....com,
        viresh.kumar@...aro.org, rafael@...nel.org,
        ionela.voinescu@....com, yang@...amperecomputing.com,
        linux-tegra@...r.kernel.org
Subject: [PATCH v2 2/2] cpufreq: Wire-up arch-flavored freq info into cpufreq_verify_current_freq

From: Sumit Gupta <sumitg@...dia.com>

When available, use arch_freq_get_on_cpu to obtain current frequency
(usually an average reported over given period of time)
to better align the cpufreq's view on the current state of affairs.
This also automatically pulls in the update for cpuinfo_cur_freq sysfs
attribute, aligning it with the scaling_cur_freq one, and thus providing
consistent view on relevant platforms.

Signed-off-by: Sumit Gupta <sumitg@...dia.com>
[BM: Subject & commit msg]
Signed-off-by: Beata Michalska <beata.michalska@....com>
---
 drivers/cpufreq/cpufreq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 8c4f9c2f9c44..109559438f45 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1756,7 +1756,8 @@ static unsigned int cpufreq_verify_current_freq(struct cpufreq_policy *policy, b
 {
 	unsigned int new_freq;
 
-	new_freq = cpufreq_driver->get(policy->cpu);
+	new_freq = arch_freq_get_on_cpu(policy->cpu);
+	new_freq = new_freq ?: cpufreq_driver->get(policy->cpu);
 	if (!new_freq)
 		return 0;
 
-- 
2.25.1