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authorEduardo Valentin <edubezval@gmail.com>2014-11-08 04:24:39 +0300
committerEduardo Valentin <edubezval@gmail.com>2014-11-20 17:44:54 +0300
commit2251aef64a38db60f4ae7a4a83f9203c6791f196 (patch)
treeeb3fe5a0e6eb2c857f331ed39538a9fb2988939d /drivers/thermal/of-thermal.c
parent66fb84805134c39f00d7c2054c881faa50910390 (diff)
downloadlinux-2251aef64a38db60f4ae7a4a83f9203c6791f196.tar.xz
thermal: of: improve of-thermal sensor registration API
Different drivers request API extensions in of-thermal. For this reason, additional callbacks are required to fit the new drivers needs. The current API implementation expects the registering sensor driver to provide a get_temp and get_trend callbacks as function parameters. As the amount of callbacks is growing, this patch changes the existing implementation to use a .ops field to hold all the of thermal callbacks to sensor drivers. This patch also changes the existing of-thermal users to fit the new API design. No functional change is introduced in this patch. Cc: Alexandre Courbot <gnurou@gmail.com> Cc: devicetree@vger.kernel.org Cc: Grant Likely <grant.likely@linaro.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Jean Delvare <jdelvare@suse.de> Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: linux-tegra@vger.kernel.org Cc: lm-sensors@lm-sensors.org Cc: Rob Herring <robh+dt@kernel.org> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Zhang Rui <rui.zhang@intel.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Mikko Perttunen <mikko.perttunen@kapsi.fi> Reviewed-by: Mikko Perttunen <mikko.perttunen@kapsi.fi> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/of-thermal.c')
-rw-r--r--drivers/thermal/of-thermal.c39
1 files changed, 17 insertions, 22 deletions
diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index 62143ba31001..b7982f0a6eaf 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -30,6 +30,7 @@
#include <linux/err.h>
#include <linux/export.h>
#include <linux/string.h>
+#include <linux/thermal.h>
#include "thermal_core.h"
@@ -77,8 +78,7 @@ struct __thermal_bind_params {
* @num_tbps: number of thermal bind params
* @tbps: an array of thermal bind params (0..num_tbps - 1)
* @sensor_data: sensor private data used while reading temperature and trend
- * @get_temp: sensor callback to read temperature
- * @get_trend: sensor callback to read temperature trend
+ * @ops: set of callbacks to handle the thermal zone based on DT
*/
struct __thermal_zone {
@@ -96,8 +96,7 @@ struct __thermal_zone {
/* sensor interface */
void *sensor_data;
- int (*get_temp)(void *, long *);
- int (*get_trend)(void *, long *);
+ const struct thermal_zone_of_device_ops *ops;
};
/*** DT thermal zone device callbacks ***/
@@ -107,10 +106,10 @@ static int of_thermal_get_temp(struct thermal_zone_device *tz,
{
struct __thermal_zone *data = tz->devdata;
- if (!data->get_temp)
+ if (!data->ops->get_temp)
return -EINVAL;
- return data->get_temp(data->sensor_data, temp);
+ return data->ops->get_temp(data->sensor_data, temp);
}
static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
@@ -120,10 +119,10 @@ static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
long dev_trend;
int r;
- if (!data->get_trend)
+ if (!data->ops->get_trend)
return -EINVAL;
- r = data->get_trend(data->sensor_data, &dev_trend);
+ r = data->ops->get_trend(data->sensor_data, &dev_trend);
if (r)
return r;
@@ -324,8 +323,7 @@ static struct thermal_zone_device_ops of_thermal_ops = {
static struct thermal_zone_device *
thermal_zone_of_add_sensor(struct device_node *zone,
struct device_node *sensor, void *data,
- int (*get_temp)(void *, long *),
- int (*get_trend)(void *, long *))
+ const struct thermal_zone_of_device_ops *ops)
{
struct thermal_zone_device *tzd;
struct __thermal_zone *tz;
@@ -336,9 +334,11 @@ thermal_zone_of_add_sensor(struct device_node *zone,
tz = tzd->devdata;
+ if (!ops)
+ return ERR_PTR(-EINVAL);
+
mutex_lock(&tzd->lock);
- tz->get_temp = get_temp;
- tz->get_trend = get_trend;
+ tz->ops = ops;
tz->sensor_data = data;
tzd->ops->get_temp = of_thermal_get_temp;
@@ -356,8 +356,7 @@ thermal_zone_of_add_sensor(struct device_node *zone,
* than one sensors
* @data: a private pointer (owned by the caller) that will be passed
* back, when a temperature reading is needed.
- * @get_temp: a pointer to a function that reads the sensor temperature.
- * @get_trend: a pointer to a function that reads the sensor temperature trend.
+ * @ops: struct thermal_zone_of_device_ops *. Must contain at least .get_temp.
*
* This function will search the list of thermal zones described in device
* tree and look for the zone that refer to the sensor device pointed by
@@ -382,9 +381,8 @@ thermal_zone_of_add_sensor(struct device_node *zone,
* check the return value with help of IS_ERR() helper.
*/
struct thermal_zone_device *
-thermal_zone_of_sensor_register(struct device *dev, int sensor_id,
- void *data, int (*get_temp)(void *, long *),
- int (*get_trend)(void *, long *))
+thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data,
+ const struct thermal_zone_of_device_ops *ops)
{
struct device_node *np, *child, *sensor_np;
struct thermal_zone_device *tzd = ERR_PTR(-ENODEV);
@@ -426,9 +424,7 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id,
if (sensor_specs.np == sensor_np && id == sensor_id) {
tzd = thermal_zone_of_add_sensor(child, sensor_np,
- data,
- get_temp,
- get_trend);
+ data, ops);
of_node_put(sensor_specs.np);
of_node_put(child);
goto exit;
@@ -476,8 +472,7 @@ void thermal_zone_of_sensor_unregister(struct device *dev,
tzd->ops->get_temp = NULL;
tzd->ops->get_trend = NULL;
- tz->get_temp = NULL;
- tz->get_trend = NULL;
+ tz->ops = NULL;
tz->sensor_data = NULL;
mutex_unlock(&tzd->lock);
}