[PATCH V3 1/6] thermal: split thermal_zone_of_sensor_register{,_param}()

[marek.vasut@gmail.com]

From: Marek Vasut <marek.vasut@gmail.com>

Introduce new thermal_zone_of_sensor_register_params() function, which
allows passing struct thermal_zone_params into it and convert original
thermal_zone_of_sensor_register() to call it with params set to NULL.

From: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: linux-renesas-soc@vger.kernel.org
To: linux-pm@vger.kernel.org
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
---
V2: Add EXPORT_SYMBOL_GPL() to fix build as a module
V3: - Work around the From line and SoB line checkpatch warning
    - Reorder the SoB line at the end
---
 drivers/thermal/of-thermal.c | 51 +++++++++++++++++++++++++++++++++---
 include/linux/thermal.h      | 12 +++++++++
 2 files changed, 60 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index 4bfdb4a1e47d..1fb450d02ab5 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -446,7 +446,8 @@ thermal_zone_of_add_sensor(struct device_node *zone,
 }
 
 /**
- * thermal_zone_of_sensor_register - registers a sensor to a DT thermal zone
+ * thermal_zone_of_sensor_register_params - registers a sensor to a DT thermal
+ *					zone with thermal zone parameters
  * @dev: a valid struct device pointer of a sensor device. Must contain
  *       a valid .of_node, for the sensor node.
  * @sensor_id: a sensor identifier, in case the sensor IP has more
@@ -454,6 +455,7 @@ thermal_zone_of_add_sensor(struct device_node *zone,
  * @data: a private pointer (owned by the caller) that will be passed
  *        back, when a temperature reading is needed.
  * @ops: struct thermal_zone_of_device_ops *. Must contain at least .get_temp.
+ * @tzp: thermal zone platform parameters
  *
  * 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
@@ -478,8 +480,9 @@ 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,
-				const struct thermal_zone_of_device_ops *ops)
+thermal_zone_of_sensor_register_params(struct device *dev, int sensor_id,
+	void *data, const struct thermal_zone_of_device_ops *ops,
+	struct thermal_zone_params *tzp)
 {
 	struct device_node *np, *child, *sensor_np;
 	struct thermal_zone_device *tzd = ERR_PTR(-ENODEV);
@@ -533,6 +536,48 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data,
 
 	return tzd;
 }
+EXPORT_SYMBOL_GPL(thermal_zone_of_sensor_register_params);
+
+/**
+ * thermal_zone_of_sensor_register - registers a sensor to a DT thermal zone
+ * @dev: a valid struct device pointer of a sensor device. Must contain
+ *       a valid .of_node, for the sensor node.
+ * @sensor_id: a sensor identifier, in case the sensor IP has more
+ *             than one sensors
+ * @data: a private pointer (owned by the caller) that will be passed
+ *        back, when a temperature reading is needed.
+ * @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
+ * @dev->of_node as temperature providers. For the zone pointing to the
+ * sensor node, the sensor will be added to the DT thermal zone device.
+ *
+ * The thermal zone temperature is provided by the @get_temp function
+ * pointer. When called, it will have the private pointer @data back.
+ *
+ * The thermal zone temperature trend is provided by the @get_trend function
+ * pointer. When called, it will have the private pointer @data back.
+ *
+ * TODO:
+ * 01 - This function must enqueue the new sensor instead of using
+ * it as the only source of temperature values.
+ *
+ * 02 - There must be a way to match the sensor with all thermal zones
+ * that refer to it.
+ *
+ * Return: On success returns a valid struct thermal_zone_device,
+ * otherwise, it returns a corresponding ERR_PTR(). Caller must
+ * 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,
+				const struct thermal_zone_of_device_ops *ops)
+{
+	return thermal_zone_of_sensor_register_params(dev, sensor_id, data,
+						      ops, NULL);
+}
 EXPORT_SYMBOL_GPL(thermal_zone_of_sensor_register);
 
 /**
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 5f4705f46c2f..922034eae74b 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -378,6 +378,10 @@ struct thermal_trip {
 struct thermal_zone_device *
 thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
 				const struct thermal_zone_of_device_ops *ops);
+struct thermal_zone_device *
+thermal_zone_of_sensor_register_params(struct device *dev, int id, void *data,
+			const struct thermal_zone_of_device_ops *ops,
+			struct thermal_zone_params *tzp);
 void thermal_zone_of_sensor_unregister(struct device *dev,
 				       struct thermal_zone_device *tz);
 struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
@@ -393,6 +397,14 @@ thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
 	return ERR_PTR(-ENODEV);
 }
 
+static inline struct thermal_zone_device *
+thermal_zone_of_sensor_register_params(struct device *dev, int id, void *data,
+			const struct thermal_zone_of_device_ops *ops,
+			struct thermal_zone_params *tzp)
+{
+	return ERR_PTR(-ENODEV);
+}
+
 static inline
 void thermal_zone_of_sensor_unregister(struct device *dev,
 				       struct thermal_zone_device *tz)
-- 
2.18.0