Thread (42 messages) 42 messages, 5 authors, 2017-10-10

[PATCH 13/34] cpufreq: exynos5440: set CPUFREQ_NO_NOTIFICATION flag

From: kgene@kernel.org (Kukjin Kim)
Date: 2013-08-18 21:57:31
Also in: linux-pm, lkml

amit daniel kachhap wrote:
On Fri, Aug 16, 2013 at 7:55 AM, Viresh Kumar [off-list ref]
wrote:
quoted
Most of the drivers do following in their ->target_index() routines:

        struct cpufreq_freqs freqs;
        freqs.old = old freq...
        freqs.new = new freq...

        cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);

        /* Change rate here */

        cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);

This is replicated over all cpufreq drivers today and there doesn't
exists a
quoted
good enough reason why this shouldn't be moved to cpufreq core instead.

Earlier patches have added support in cpufreq core to do cpufreq
notification on
quoted
frequency change, but this drivers needs to do this notification itself
and so
quoted
it sets its CPUFREQ_NO_NOTIFICATION flag.

Cc: Kukjin Kim <redacted>
Acked-by: Kukjin Kim <redacted>

Thanks,
Kukjin
quoted
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The code change looks fine,
Acked-By: Amit Daniel Kachhap <redacted>

Thanks
Amit Daniel
quoted
---
 drivers/cpufreq/exynos5440-cpufreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cpufreq/exynos5440-cpufreq.c
b/drivers/cpufreq/exynos5440-cpufreq.c
quoted
index 91a64d6..8fb6183 100644
--- a/drivers/cpufreq/exynos5440-cpufreq.c
+++ b/drivers/cpufreq/exynos5440-cpufreq.c
@@ -323,7 +323,7 @@ static int exynos_cpufreq_cpu_init(struct
cpufreq_policy *policy)
quoted
 }

 static struct cpufreq_driver exynos_driver = {
-       .flags          = CPUFREQ_STICKY,
+       .flags          = CPUFREQ_STICKY | CPUFREQ_NO_NOTIFICATION,
        .verify         = cpufreq_generic_frequency_table_verify,
        .target_index   = exynos_target,
        .get            = exynos_getspeed,
--
1.7.12.rc2.18.g61b472e
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