linux-kernel - [PATCH v2 06/11] PM / devfreq: Make update

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Message-Id: <20180607181214.30338-7-mka@chromium.org>
Date:   Thu,  7 Jun 2018 11:12:09 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>
Cc:     Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v2 06/11] 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>
---
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 8a4c0f10a394..781edefb0087 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -222,6 +222,14 @@ 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.rc1.242.g61856ae69a-goog