linux-kernel - [PATCH v6 3/3] PM / devfreq: Make update

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Message-Id: <20180803200511.189664-4-mka@chromium.org>
Date:   Fri,  3 Aug 2018 13:05:11 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v6 3/3] PM / devfreq: Make update_devfreq() public

Currently update_devfreq() is only visible to devfreq governors outside
of devfreq.c. Make it public to allow drivers that adjust devfreq policies
to cause a re-evaluation of the frequency after a policy change.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>
Reviewed-by: Brian Norris <briannorris@...omium.org>
Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>
--
Changes in v6:
- added 'Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>' tag

Changes in v5:
- none

Changed in v4:
- added 'Reviewed-by: Brian Norris <briannorris@...omium.org>' tag

Changes in v3:
- none

Changes in v2:
- added 'Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>' tag
---
 drivers/devfreq/governor.h | 3 ---
 include/linux/devfreq.h    | 8 ++++++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h
index b81700244ce3..f53339ca610f 100644
--- a/drivers/devfreq/governor.h
+++ b/drivers/devfreq/governor.h
@@ -57,9 +57,6 @@ struct devfreq_governor {
 				unsigned int event, void *data);
 };
 
-/* Caution: devfreq->lock must be locked before calling update_devfreq */
-extern int update_devfreq(struct devfreq *devfreq);
-
 extern void devfreq_monitor_start(struct devfreq *devfreq);
 extern void devfreq_monitor_stop(struct devfreq *devfreq);
 extern void devfreq_monitor_suspend(struct devfreq *devfreq);
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index 3aae5b3af87c..e4963b0f45da 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -198,6 +198,14 @@ extern void devm_devfreq_remove_device(struct device *dev,
 extern int devfreq_suspend_device(struct devfreq *devfreq);
 extern int devfreq_resume_device(struct devfreq *devfreq);
 
+/**
+ * update_devfreq() - Reevaluate the device and configure frequency
+ * @devfreq:	the devfreq device
+ *
+ * Note: devfreq->lock must be held
+ */
+extern int update_devfreq(struct devfreq *devfreq);
+
 /* Helper functions for devfreq user device driver with OPP. */
 extern struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
 					   unsigned long *freq, u32 flags);
-- 
2.18.0.597.ga71716f1ad-goog