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[RFCv2,16/23] sched, cpufreq: Current compute capacity hack for ARM TC2

Message ID 1404404770-323-17-git-send-email-morten.rasmussen@arm.com (mailing list archive)
State RFC, archived
Headers show

Commit Message

Morten Rasmussen July 3, 2014, 4:26 p.m. UTC 
Hack to report different cpu capacities for big and little cpus.
This is for experimentation on ARM TC2 _only_. A proper solution
has to address this problem.

Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
---
 drivers/cpufreq/cpufreq.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index a2b788d..efec777 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -316,7 +316,13 @@  static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
 		pr_debug("FREQ: %lu - CPU: %lu\n",
 			 (unsigned long)freqs->new, (unsigned long)freqs->cpu);
 		trace_cpu_frequency(freqs->new, freqs->cpu);
-		set_curr_capacity(freqs->cpu, (freqs->new*1024)/policy->max);
+		/* Massive TC2 hack */
+		if (freqs->cpu == 0 || freqs->cpu == 1)
+			/* A15 cpus (max_capacity = 2015) */
+			set_curr_capacity(freqs->cpu, (freqs->new*2015)/1200000);
+		else
+			/* A7 cpus (nax_capacity = 1024) */
+			set_curr_capacity(freqs->cpu, (freqs->new*1024)/1000000);
 		srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
 				CPUFREQ_POSTCHANGE, freqs);
 		if (likely(policy) && likely(policy->cpu == freqs->cpu))