1 files changed, 143 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.4/016-2-thermal-of-thermal-Add-devm-version-of.patch b/target/linux/ipq806x/patches-4.4/016-2-thermal-of-thermal-Add-devm-version-of.patch
new file mode 100644
index 0000000..1ca7326
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/016-2-thermal-of-thermal-Add-devm-version-of.patch
@@ -0,0 +1,143 @@
+From e498b4984db82b4ba3ceea7dba813222a31e9c2e Mon Sep 17 00:00:00 2001
+From: Laxman Dewangan <ldewangan@nvidia.com>
+Date: Wed, 9 Mar 2016 18:40:06 +0530
+Subject: thermal: of-thermal: Add devm version of
+ thermal_zone_of_sensor_register
+
+Add resource managed version of thermal_zone_of_sensor_register() and
+thermal_zone_of_sensor_unregister().
+
+This helps in reducing the code size in error path, remove of
+driver remove callbacks and making proper sequence for deallocations.
+
+Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
+Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
+---
+ drivers/thermal/of-thermal.c | 81 ++++++++++++++++++++++++++++++++++++++++++++
+ include/linux/thermal.h      | 18 ++++++++++
+ 2 files changed, 99 insertions(+)
+
+--- a/drivers/thermal/of-thermal.c
++++ b/drivers/thermal/of-thermal.c
+@@ -559,6 +559,87 @@ void thermal_zone_of_sensor_unregister(s
+ }
+ EXPORT_SYMBOL_GPL(thermal_zone_of_sensor_unregister);
+ 
++static void devm_thermal_zone_of_sensor_release(struct device *dev, void *res)
++{
++	thermal_zone_of_sensor_unregister(dev,
++					  *(struct thermal_zone_device **)res);
++}
++
++static int devm_thermal_zone_of_sensor_match(struct device *dev, void *res,
++					     void *data)
++{
++	struct thermal_zone_device **r = res;
++
++	if (WARN_ON(!r || !*r))
++		return 0;
++
++	return *r == data;
++}
++
++/**
++ * devm_thermal_zone_of_sensor_register - Resource managed version of
++ *				thermal_zone_of_sensor_register()
++ * @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.
++ *
++ * Refer thermal_zone_of_sensor_register() for more details.
++ *
++ * 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.
++ * Registered hermal_zone_device device will automatically be
++ * released when device is unbounded.
++ */
++struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
++	struct device *dev, int sensor_id,
++	void *data, const struct thermal_zone_of_device_ops *ops)
++{
++	struct thermal_zone_device **ptr, *tzd;
++
++	ptr = devres_alloc(devm_thermal_zone_of_sensor_release, sizeof(*ptr),
++			   GFP_KERNEL);
++	if (!ptr)
++		return ERR_PTR(-ENOMEM);
++
++	tzd = thermal_zone_of_sensor_register(dev, sensor_id, data, ops);
++	if (IS_ERR(tzd)) {
++		devres_free(ptr);
++		return tzd;
++	}
++
++	*ptr = tzd;
++	devres_add(dev, ptr);
++
++	return tzd;
++}
++EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_register);
++
++/**
++ * devm_thermal_zone_of_sensor_unregister - Resource managed version of
++ *				thermal_zone_of_sensor_unregister().
++ * @dev: Device for which which resource was allocated.
++ * @tzd: a pointer to struct thermal_zone_device where the sensor is registered.
++ *
++ * This function removes the sensor callbacks and private data from the
++ * thermal zone device registered with devm_thermal_zone_of_sensor_register()
++ * API. It will also silent the zone by remove the .get_temp() and .get_trend()
++ * thermal zone device callbacks.
++ * Normally this function will not need to be called and the resource
++ * management code will ensure that the resource is freed.
++ */
++void devm_thermal_zone_of_sensor_unregister(struct device *dev,
++					    struct thermal_zone_device *tzd)
++{
++	WARN_ON(devres_release(dev, devm_thermal_zone_of_sensor_release,
++			       devm_thermal_zone_of_sensor_match, tzd));
++}
++EXPORT_SYMBOL_GPL(devm_thermal_zone_of_sensor_unregister);
++
+ /***   functions parsing device tree nodes   ***/
+ 
+ /**
+--- a/include/linux/thermal.h
++++ b/include/linux/thermal.h
+@@ -364,6 +364,11 @@ thermal_zone_of_sensor_register(struct d
+ 				const struct thermal_zone_of_device_ops *ops);
+ void thermal_zone_of_sensor_unregister(struct device *dev,
+ 				       struct thermal_zone_device *tz);
++struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
++		struct device *dev, int id, void *data,
++		const struct thermal_zone_of_device_ops *ops);
++void devm_thermal_zone_of_sensor_unregister(struct device *dev,
++					    struct thermal_zone_device *tz);
+ #else
+ static inline struct thermal_zone_device *
+ thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
+@@ -378,6 +383,19 @@ void thermal_zone_of_sensor_unregister(s
+ {
+ }
+ 
++static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
++		struct device *dev, int id, void *data,
++		const struct thermal_zone_of_device_ops *ops)
++{
++	return ERR_PTR(-ENODEV);
++}
++
++static inline
++void devm_thermal_zone_of_sensor_unregister(struct device *dev,
++					    struct thermal_zone_device *tz)
++{
++}
++
+ #endif
+ 
+ #if IS_ENABLED(CONFIG_THERMAL)