thermal/core: Add a thermal zone 'devdata' accessor

The thermal zone device structure is exposed to the different drivers
and obviously they access the internals while that should be
restricted to the core thermal code.

In order to self-encapsulate the thermal core code, we need to prevent
the drivers accessing directly the thermal zone structure and provide
accessor functions to deal with.

Provide an accessor to the 'devdata' structure and make use of it in
the different drivers.

No functional changes intended.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 55679fd86505d762ea05ec68028e1a500aec0b5d..8a0cdabccc7d92c2d6f57a4314e85bb59e302715 100644 (file)
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1377,6 +1377,12 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, int n
 }
 EXPORT_SYMBOL_GPL(thermal_zone_device_register);
 
+void *thermal_zone_device_priv(struct thermal_zone_device *tzd)
+{
+       return tzd->devdata;
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_priv);
+
 /**
  * thermal_zone_device_unregister - removes the registered thermal zone device
  * @tz: the thermal zone device to remove

diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 2bb4bf33f4f32df80449108f53aaa7c193a75fb2..7dbb5712434c776b022ad0709a66005a36db4388 100644 (file)
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -365,6 +365,8 @@ thermal_zone_device_register_with_trips(const char *, struct thermal_trip *, int
                                        void *, struct thermal_zone_device_ops *,
                                        struct thermal_zone_params *, int, int);
 
+void *thermal_zone_device_priv(struct thermal_zone_device *tzd);
+
 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
                                     struct thermal_cooling_device *,
                                     unsigned long, unsigned long,
@@ -436,6 +438,11 @@ static inline int thermal_zone_get_offset(
                struct thermal_zone_device *tz)
 { return -ENODEV; }
 
+static inline void *thermal_zone_device_priv(struct thermal_zone_device *tz)
+{
+       return NULL;
+}
+
 static inline int thermal_zone_device_enable(struct thermal_zone_device *tz)
 { return -ENODEV; }