linux-kernel - [PATCH 1/2] thermal: core: Make thermal_zone_set

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Date:   Tue, 31 Mar 2020 18:54:48 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     daniel.lezcano@...aro.org
Cc:     Zhang Rui <rui.zhang@...el.com>,
        Amit Kucheria <amit.kucheria@...durent.com>,
        linux-pm@...r.kernel.org (open list:THERMAL),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 1/2] thermal: core: Make thermal_zone_set_trips private

The function thermal_zone_set_trips() is used by the thermal core code
in order to update the next trip points, there are no other users.

Move the function definition in the thermal_core.h, remove the
EXPORT_SYMBOL_GPL and document the function.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 drivers/thermal/thermal_core.h    |  3 +++
 drivers/thermal/thermal_helpers.c | 13 ++++++++++++-
 include/linux/thermal.h           |  3 ---
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
index a9bf00e91d64..37cd4e2bead2 100644
--- a/drivers/thermal/thermal_core.h
+++ b/drivers/thermal/thermal_core.h
@@ -69,6 +69,9 @@ void thermal_zone_device_unbind_exception(struct thermal_zone_device *,
 int thermal_zone_device_set_policy(struct thermal_zone_device *, char *);
 int thermal_build_list_of_policies(char *buf);
 
+/* Helpers */
+void thermal_zone_set_trips(struct thermal_zone_device *tz);
+
 /* sysfs I/F */
 int thermal_zone_create_device_groups(struct thermal_zone_device *, int);
 void thermal_zone_destroy_device_groups(struct thermal_zone_device *);
diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
index 2ba756af76b7..59eaf2d0fdb3 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -113,6 +113,18 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
 }
 EXPORT_SYMBOL_GPL(thermal_zone_get_temp);
 
+/**
+ * thermal_zone_set_trips - Computes the next trip points for the driver
+ * @tz: a pointer to a thermal zone device structure
+ *
+ * The function computes the next temperature boundaries by browsing
+ * the trip points. The result is the closer low and high trip points
+ * to the current temperature. These values are passed to the backend
+ * driver to let it set its own notification mechanism (usually an
+ * interrupt).
+ *
+ * It does not return a value
+ */
 void thermal_zone_set_trips(struct thermal_zone_device *tz)
 {
 	int low = -INT_MAX;
@@ -161,7 +173,6 @@ void thermal_zone_set_trips(struct thermal_zone_device *tz)
 exit:
 	mutex_unlock(&tz->lock);
 }
-EXPORT_SYMBOL_GPL(thermal_zone_set_trips);
 
 void thermal_cdev_update(struct thermal_cooling_device *cdev)
 {
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index c91b1e344d56..448841ab0dca 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -439,7 +439,6 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
 				       struct thermal_cooling_device *);
 void thermal_zone_device_update(struct thermal_zone_device *,
 				enum thermal_notify_event);
-void thermal_zone_set_trips(struct thermal_zone_device *);
 
 struct thermal_cooling_device *thermal_cooling_device_register(const char *,
 		void *, const struct thermal_cooling_device_ops *);
@@ -497,8 +496,6 @@ static inline int thermal_zone_unbind_cooling_device(
 static inline void thermal_zone_device_update(struct thermal_zone_device *tz,
 					      enum thermal_notify_event event)
 { }
-static inline void thermal_zone_set_trips(struct thermal_zone_device *tz)
-{ }
 static inline struct thermal_cooling_device *
 thermal_cooling_device_register(char *type, void *devdata,
 	const struct thermal_cooling_device_ops *ops)
-- 
2.17.1