lkml.org 
[lkml]   [2013]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V2 1/5] cpufreq: Introduce cpufreq_notify_post_transition()
Date
This introduces another routine cpufreq_notify_post_transition() which can be
used to send POSTCHANGE notification for new freq with or without both
{PRE|POST}CHANGE notifications for last freq. This is useful at multiple places,
specially for sending transition failure notifications.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---

V1->V2:
- Not required to push it for 3.13 anymore and can go in 3.14.
- Rebased over following patchset as there were conflicts in unicore2 driver if
following patchset is applied first (which should be the case):
https://lkml.org/lkml/2013/10/30/553 (create cpufreq_generic_get() routine)

drivers/cpufreq/cpufreq.c | 14 ++++++++++++++
include/linux/cpufreq.h | 2 ++
2 files changed, 16 insertions(+)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 5e27def..3b877d4 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -338,6 +338,20 @@ void cpufreq_notify_transition(struct cpufreq_policy *policy,
}
EXPORT_SYMBOL_GPL(cpufreq_notify_transition);

+/* Do post notifications when there are chances that transition has failed */
+void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
+ struct cpufreq_freqs *freqs, int transition_failed)
+{
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+ if (!transition_failed)
+ return;
+
+ swap(freqs->old, freqs->new);
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE);
+ cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
+}
+EXPORT_SYMBOL_GPL(cpufreq_notify_post_transition);
+

/*********************************************************************
* SYSFS INTERFACE *
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 276e646..b26bfab 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -316,6 +316,8 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);

void cpufreq_notify_transition(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs, unsigned int state);
+void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
+ struct cpufreq_freqs *freqs, int transition_failed);

#else /* CONFIG_CPU_FREQ */
static inline int cpufreq_register_notifier(struct notifier_block *nb,
--
1.7.12.rc2.18.g61b472e


\
 
 \ /
  Last update: 2013-12-02 06:41    [W:0.051 / U:1.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site