linux-kernel - [PATCH v5 07/12] PM / devfreq: export devfreq

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Message-Id: <20180703234705.227473-8-mka@chromium.org>
Date:   Tue,  3 Jul 2018 16:47:00 -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>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Lee Jones <lee.jones@...aro.org>,
        Benson Leung <bleung@...omium.org>,
        Olof Johansson <olof@...om.net>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v5 07/12] PM / devfreq: export devfreq_class

Exporting the device class allows other parts of the kernel to enumerate
the devfreq devices and receive notification when a devfreq device is
added or removed.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
Reviewed-by: Brian Norris <briannorris@...omium.org>
---
Changes in v5:
- none

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

Changes in v3:
- none

Changes in v2:
- patch added to series
---
 drivers/devfreq/devfreq.c | 3 ++-
 include/linux/devfreq.h   | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 4cbaa7ad1972..38b90b64fc6e 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -31,7 +31,8 @@
 #define MAX(a,b)	((a > b) ? a : b)
 #define MIN(a,b)	((a < b) ? a : b)
 
-static struct class *devfreq_class;
+struct class *devfreq_class;
+EXPORT_SYMBOL_GPL(devfreq_class);
 
 /*
  * devfreq core provides delayed work based load monitoring helper
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index c4f84a769cb5..964e064a951f 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -206,6 +206,8 @@ struct devfreq_freqs {
 };
 
 #if defined(CONFIG_PM_DEVFREQ)
+extern struct class *devfreq_class;
+
 extern struct devfreq *devfreq_add_device(struct device *dev,
 				  struct devfreq_dev_profile *profile,
 				  const char *governor_name,
-- 
2.18.0.203.gfac676dfb9-goog