diff options
Diffstat (limited to 'target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.patch')
| -rw-r--r-- | target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.patch | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.patch b/target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.patch new file mode 100644 index 0000000..b551bac --- /dev/null +++ b/target/linux/generic/patches-4.4/086-0001-thermal-of-thermal-Add-devm-version-of-thermal_zone_.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: [PATCH] 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) |