From ff16cab69b6ed621686cf342306785175775152d Mon Sep 17 00:00:00 2001 From: Len Brown Date: Tue, 29 Apr 2008 03:12:17 -0400 Subject: thermal: re-name thermal.c to thermal_sys.c thermal_sys was already the name of the resulting module, and it is built from this one source file. Signed-off-by: Len Brown --- drivers/thermal/Makefile | 1 - drivers/thermal/thermal.c | 899 ------------------------------------------ drivers/thermal/thermal_sys.c | 899 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 899 insertions(+), 900 deletions(-) delete mode 100644 drivers/thermal/thermal.c create mode 100644 drivers/thermal/thermal_sys.c (limited to 'drivers/thermal') diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 02b64517be8..31108a01c22 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -2,5 +2,4 @@ # Makefile for sensor chip drivers. # -thermal_sys-objs += thermal.o obj-$(CONFIG_THERMAL) += thermal_sys.o diff --git a/drivers/thermal/thermal.c b/drivers/thermal/thermal.c deleted file mode 100644 index 6098787341f..00000000000 --- a/drivers/thermal/thermal.c +++ /dev/null @@ -1,899 +0,0 @@ -/* - * thermal.c - Generic Thermal Management Sysfs support. - * - * Copyright (C) 2008 Intel Corp - * Copyright (C) 2008 Zhang Rui - * Copyright (C) 2008 Sujith Thomas - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - */ - -#include -#include -#include -#include -#include -#include -#include - -MODULE_AUTHOR("Zhang Rui"); -MODULE_DESCRIPTION("Generic thermal management sysfs support"); -MODULE_LICENSE("GPL"); - -#define PREFIX "Thermal: " - -struct thermal_cooling_device_instance { - int id; - char name[THERMAL_NAME_LENGTH]; - struct thermal_zone_device *tz; - struct thermal_cooling_device *cdev; - int trip; - char attr_name[THERMAL_NAME_LENGTH]; - struct device_attribute attr; - struct list_head node; -}; - -static DEFINE_IDR(thermal_tz_idr); -static DEFINE_IDR(thermal_cdev_idr); -static DEFINE_MUTEX(thermal_idr_lock); - -static LIST_HEAD(thermal_tz_list); -static LIST_HEAD(thermal_cdev_list); -static DEFINE_MUTEX(thermal_list_lock); - -static int get_idr(struct idr *idr, struct mutex *lock, int *id) -{ - int err; - - again: - if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) - return -ENOMEM; - - if (lock) - mutex_lock(lock); - err = idr_get_new(idr, NULL, id); - if (lock) - mutex_unlock(lock); - if (unlikely(err == -EAGAIN)) - goto again; - else if (unlikely(err)) - return err; - - *id = *id & MAX_ID_MASK; - return 0; -} - -static void release_idr(struct idr *idr, struct mutex *lock, int id) -{ - if (lock) - mutex_lock(lock); - idr_remove(idr, id); - if (lock) - mutex_unlock(lock); -} - -/* sys I/F for thermal zone */ - -#define to_thermal_zone(_dev) \ - container_of(_dev, struct thermal_zone_device, device) - -static ssize_t -type_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct thermal_zone_device *tz = to_thermal_zone(dev); - - return sprintf(buf, "%s\n", tz->type); -} - -static ssize_t -temp_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct thermal_zone_device *tz = to_thermal_zone(dev); - - if (!tz->ops->get_temp) - return -EPERM; - - return tz->ops->get_temp(tz, buf); -} - -static ssize_t -mode_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct thermal_zone_device *tz = to_thermal_zone(dev); - - if (!tz->ops->get_mode) - return -EPERM; - - return tz->ops->get_mode(tz, buf); -} - -static ssize_t -mode_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct thermal_zone_device *tz = to_thermal_zone(dev); - int result; - - if (!tz->ops->set_mode) - return -EPERM; - - result = tz->ops->set_mode(tz, buf); - if (result) - return result; - - return count; -} - -static ssize_t -trip_point_type_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct thermal_zone_device *tz = to_thermal_zone(dev); - int trip; - - if (!tz->ops->get_trip_type) - return -EPERM; - - if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) - return -EINVAL; - - return tz->ops->get_trip_type(tz, trip, buf); -} - -static ssize_t -trip_point_temp_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct thermal_zone_device *tz = to_thermal_zone(dev); - int trip; - - if (!tz->ops->get_trip_temp) - return -EPERM; - - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) - return -EINVAL; - - return tz->ops->get_trip_temp(tz, trip, buf); -} - -static DEVICE_ATTR(type, 0444, type_show, NULL); -static DEVICE_ATTR(temp, 0444, temp_show, NULL); -static DEVICE_ATTR(mode, 0644, mode_show, mode_store); - -static struct device_attribute trip_point_attrs[] = { - __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), - __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), - __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), -}; - -#define TRIP_POINT_ATTR_ADD(_dev, _index, result) \ -do { \ - result = device_create_file(_dev, \ - &trip_point_attrs[_index * 2]); \ - if (result) \ - break; \ - result = device_create_file(_dev, \ - &trip_point_attrs[_index * 2 + 1]); \ -} while (0) - -#define TRIP_POINT_ATTR_REMOVE(_dev, _index) \ -do { \ - device_remove_file(_dev, &trip_point_attrs[_index * 2]); \ - device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \ -} while (0) - -/* sys I/F for cooling device */ -#define to_cooling_device(_dev) \ - container_of(_dev, struct thermal_cooling_device, device) - -static ssize_t -thermal_cooling_device_type_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct thermal_cooling_device *cdev = to_cooling_device(dev); - - return sprintf(buf, "%s\n", cdev->type); -} - -static ssize_t -thermal_cooling_device_max_state_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct thermal_cooling_device *cdev = to_cooling_device(dev); - - return cdev->ops->get_max_state(cdev, buf); -} - -static ssize_t -thermal_cooling_device_cur_state_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct thermal_cooling_device *cdev = to_cooling_device(dev); - - return cdev->ops->get_cur_state(cdev, buf); -} - -static ssize_t -thermal_cooling_device_cur_state_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct thermal_cooling_device *cdev = to_cooling_device(dev); - int state; - int result; - - if (!sscanf(buf, "%d\n", &state)) - return -EINVAL; - - if (state < 0) - return -EINVAL; - - result = cdev->ops->set_cur_state(cdev, state); - if (result) - return result; - return count; -} - -static struct device_attribute dev_attr_cdev_type = -__ATTR(type, 0444, thermal_cooling_device_type_show, NULL); -static DEVICE_ATTR(max_state, 0444, - thermal_cooling_device_max_state_show, NULL); -static DEVICE_ATTR(cur_state, 0644, - thermal_cooling_device_cur_state_show, - thermal_cooling_device_cur_state_store); - -static ssize_t -thermal_cooling_device_trip_point_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct thermal_cooling_device_instance *instance; - - instance = - container_of(attr, struct thermal_cooling_device_instance, attr); - - if (instance->trip == THERMAL_TRIPS_NONE) - return sprintf(buf, "-1\n"); - else - return sprintf(buf, "%d\n", instance->trip); -} - -/* Device management */ - -#if defined(CONFIG_HWMON) || \ - (defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE)) -/* hwmon sys I/F */ -#include -static LIST_HEAD(thermal_hwmon_list); - -static ssize_t -name_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct thermal_hwmon_device *hwmon = dev->driver_data; - return sprintf(buf, "%s\n", hwmon->type); -} -static DEVICE_ATTR(name, 0444, name_show, NULL); - -static ssize_t -temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct thermal_hwmon_attr *hwmon_attr - = container_of(attr, struct thermal_hwmon_attr, attr); - struct thermal_zone_device *tz - = container_of(hwmon_attr, struct thermal_zone_device, - temp_input); - - return tz->ops->get_temp(tz, buf); -} - -static ssize_t -temp_crit_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct thermal_hwmon_attr *hwmon_attr - = container_of(attr, struct thermal_hwmon_attr, attr); - struct thermal_zone_device *tz - = container_of(hwmon_attr, struct thermal_zone_device, - temp_crit); - - return tz->ops->get_trip_temp(tz, 0, buf); -} - - -static int -thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) -{ - struct thermal_hwmon_device *hwmon; - int new_hwmon_device = 1; - int result; - - mutex_lock(&thermal_list_lock); - list_for_each_entry(hwmon, &thermal_hwmon_list, node) - if (!strcmp(hwmon->type, tz->type)) { - new_hwmon_device = 0; - mutex_unlock(&thermal_list_lock); - goto register_sys_interface; - } - mutex_unlock(&thermal_list_lock); - - hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); - if (!hwmon) - return -ENOMEM; - - INIT_LIST_HEAD(&hwmon->tz_list); - strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); - hwmon->device = hwmon_device_register(NULL); - if (IS_ERR(hwmon->device)) { - result = PTR_ERR(hwmon->device); - goto free_mem; - } - hwmon->device->driver_data = hwmon; - result = device_create_file(hwmon->device, &dev_attr_name); - if (result) - goto unregister_hwmon_device; - - register_sys_interface: - tz->hwmon = hwmon; - hwmon->count++; - - snprintf(tz->temp_input.name, THERMAL_NAME_LENGTH, - "temp%d_input", hwmon->count); - tz->temp_input.attr.attr.name = tz->temp_input.name; - tz->temp_input.attr.attr.mode = 0444; - tz->temp_input.attr.show = temp_input_show; - result = device_create_file(hwmon->device, &tz->temp_input.attr); - if (result) - goto unregister_hwmon_device; - - if (tz->ops->get_crit_temp) { - unsigned long temperature; - if (!tz->ops->get_crit_temp(tz, &temperature)) { - snprintf(tz->temp_crit.name, THERMAL_NAME_LENGTH, - "temp%d_crit", hwmon->count); - tz->temp_crit.attr.attr.name = tz->temp_crit.name; - tz->temp_crit.attr.attr.mode = 0444; - tz->temp_crit.attr.show = temp_crit_show; - result = device_create_file(hwmon->device, - &tz->temp_crit.attr); - if (result) - goto unregister_hwmon_device; - } - } - - mutex_lock(&thermal_list_lock); - if (new_hwmon_device) - list_add_tail(&hwmon->node, &thermal_hwmon_list); - list_add_tail(&tz->hwmon_node, &hwmon->tz_list); - mutex_unlock(&thermal_list_lock); - - return 0; - - unregister_hwmon_device: - device_remove_file(hwmon->device, &tz->temp_crit.attr); - device_remove_file(hwmon->device, &tz->temp_input.attr); - if (new_hwmon_device) { - device_remove_file(hwmon->device, &dev_attr_name); - hwmon_device_unregister(hwmon->device); - } - free_mem: - if (new_hwmon_device) - kfree(hwmon); - - return result; -} - -static void -thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) -{ - struct thermal_hwmon_device *hwmon = tz->hwmon; - - tz->hwmon = NULL; - device_remove_file(hwmon->device, &tz->temp_input.attr); - device_remove_file(hwmon->device, &tz->temp_crit.attr); - - mutex_lock(&thermal_list_lock); - list_del(&tz->hwmon_node); - if (!list_empty(&hwmon->tz_list)) { - mutex_unlock(&thermal_list_lock); - return; - } - list_del(&hwmon->node); - mutex_unlock(&thermal_list_lock); - - device_remove_file(hwmon->device, &dev_attr_name); - hwmon_device_unregister(hwmon->device); - kfree(hwmon); -} -#else -static int -thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) -{ - return 0; -} - -static void -thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) -{ -} -#endif - - -/** - * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone - * @tz: thermal zone device - * @trip: indicates which trip point the cooling devices is - * associated with in this thermal zone. - * @cdev: thermal cooling device - * - * This function is usually called in the thermal zone device .bind callback. - */ -int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, - int trip, - struct thermal_cooling_device *cdev) -{ - struct thermal_cooling_device_instance *dev; - struct thermal_cooling_device_instance *pos; - struct thermal_zone_device *pos1; - struct thermal_cooling_device *pos2; - int result; - - if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) - return -EINVAL; - - list_for_each_entry(pos1, &thermal_tz_list, node) { - if (pos1 == tz) - break; - } - list_for_each_entry(pos2, &thermal_cdev_list, node) { - if (pos2 == cdev) - break; - } - - if (tz != pos1 || cdev != pos2) - return -EINVAL; - - dev = - kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); - if (!dev) - return -ENOMEM; - dev->tz = tz; - dev->cdev = cdev; - dev->trip = trip; - result = get_idr(&tz->idr, &tz->lock, &dev->id); - if (result) - goto free_mem; - - sprintf(dev->name, "cdev%d", dev->id); - result = - sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); - if (result) - goto release_idr; - - sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); - dev->attr.attr.name = dev->attr_name; - dev->attr.attr.mode = 0444; - dev->attr.show = thermal_cooling_device_trip_point_show; - result = device_create_file(&tz->device, &dev->attr); - if (result) - goto remove_symbol_link; - - mutex_lock(&tz->lock); - list_for_each_entry(pos, &tz->cooling_devices, node) - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { - result = -EEXIST; - break; - } - if (!result) - list_add_tail(&dev->node, &tz->cooling_devices); - mutex_unlock(&tz->lock); - - if (!result) - return 0; - - device_remove_file(&tz->device, &dev->attr); - remove_symbol_link: - sysfs_remove_link(&tz->device.kobj, dev->name); - release_idr: - release_idr(&tz->idr, &tz->lock, dev->id); - free_mem: - kfree(dev); - return result; -} - -EXPORT_SYMBOL(thermal_zone_bind_cooling_device); - -/** - * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone - * @tz: thermal zone device - * @trip: indicates which trip point the cooling devices is - * associated with in this thermal zone. - * @cdev: thermal cooling device - * - * This function is usually called in the thermal zone device .unbind callback. - */ -int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, - int trip, - struct thermal_cooling_device *cdev) -{ - struct thermal_cooling_device_instance *pos, *next; - - mutex_lock(&tz->lock); - list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { - list_del(&pos->node); - mutex_unlock(&tz->lock); - goto unbind; - } - } - mutex_unlock(&tz->lock); - - return -ENODEV; - - unbind: - device_remove_file(&tz->device, &pos->attr); - sysfs_remove_link(&tz->device.kobj, pos->name); - release_idr(&tz->idr, &tz->lock, pos->id); - kfree(pos); - return 0; -} - -EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); - -static void thermal_release(struct device *dev) -{ - struct thermal_zone_device *tz; - struct thermal_cooling_device *cdev; - - if (!strncmp(dev->bus_id, "thermal_zone", sizeof "thermal_zone" - 1)) { - tz = to_thermal_zone(dev); - kfree(tz); - } else { - cdev = to_cooling_device(dev); - kfree(cdev); - } -} - -static struct class thermal_class = { - .name = "thermal", - .dev_release = thermal_release, -}; - -/** - * thermal_cooling_device_register - register a new thermal cooling device - * @type: the thermal cooling device type. - * @devdata: device private data. - * @ops: standard thermal cooling devices callbacks. - */ -struct thermal_cooling_device *thermal_cooling_device_register(char *type, - void *devdata, - struct - thermal_cooling_device_ops - *ops) -{ - struct thermal_cooling_device *cdev; - struct thermal_zone_device *pos; - int result; - - if (strlen(type) >= THERMAL_NAME_LENGTH) - return ERR_PTR(-EINVAL); - - if (!ops || !ops->get_max_state || !ops->get_cur_state || - !ops->set_cur_state) - return ERR_PTR(-EINVAL); - - cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); - if (!cdev) - return ERR_PTR(-ENOMEM); - - result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); - if (result) { - kfree(cdev); - return ERR_PTR(result); - } - - strcpy(cdev->type, type); - cdev->ops = ops; - cdev->device.class = &thermal_class; - cdev->devdata = devdata; - sprintf(cdev->device.bus_id, "cooling_device%d", cdev->id); - result = device_register(&cdev->device); - if (result) { - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); - kfree(cdev); - return ERR_PTR(result); - } - - /* sys I/F */ - if (type) { - result = device_create_file(&cdev->device, &dev_attr_cdev_type); - if (result) - goto unregister; - } - - result = device_create_file(&cdev->device, &dev_attr_max_state); - if (result) - goto unregister; - - result = device_create_file(&cdev->device, &dev_attr_cur_state); - if (result) - goto unregister; - - mutex_lock(&thermal_list_lock); - list_add(&cdev->node, &thermal_cdev_list); - list_for_each_entry(pos, &thermal_tz_list, node) { - if (!pos->ops->bind) - continue; - result = pos->ops->bind(pos, cdev); - if (result) - break; - - } - mutex_unlock(&thermal_list_lock); - - if (!result) - return cdev; - - unregister: - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); - device_unregister(&cdev->device); - return ERR_PTR(result); -} - -EXPORT_SYMBOL(thermal_cooling_device_register); - -/** - * thermal_cooling_device_unregister - removes the registered thermal cooling device - * @cdev: the thermal cooling device to remove. - * - * thermal_cooling_device_unregister() must be called when the device is no - * longer needed. - */ -void thermal_cooling_device_unregister(struct - thermal_cooling_device - *cdev) -{ - struct thermal_zone_device *tz; - struct thermal_cooling_device *pos = NULL; - - if (!cdev) - return; - - mutex_lock(&thermal_list_lock); - list_for_each_entry(pos, &thermal_cdev_list, node) - if (pos == cdev) - break; - if (pos != cdev) { - /* thermal cooling device not found */ - mutex_unlock(&thermal_list_lock); - return; - } - list_del(&cdev->node); - list_for_each_entry(tz, &thermal_tz_list, node) { - if (!tz->ops->unbind) - continue; - tz->ops->unbind(tz, cdev); - } - mutex_unlock(&thermal_list_lock); - if (cdev->type[0]) - device_remove_file(&cdev->device, &dev_attr_cdev_type); - device_remove_file(&cdev->device, &dev_attr_max_state); - device_remove_file(&cdev->device, &dev_attr_cur_state); - - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); - device_unregister(&cdev->device); - return; -} - -EXPORT_SYMBOL(thermal_cooling_device_unregister); - -/** - * thermal_zone_device_register - register a new thermal zone device - * @type: the thermal zone device type - * @trips: the number of trip points the thermal zone support - * @devdata: private device data - * @ops: standard thermal zone device callbacks - * - * thermal_zone_device_unregister() must be called when the device is no - * longer needed. - */ -struct thermal_zone_device *thermal_zone_device_register(char *type, - int trips, - void *devdata, struct - thermal_zone_device_ops - *ops) -{ - struct thermal_zone_device *tz; - struct thermal_cooling_device *pos; - int result; - int count; - - if (strlen(type) >= THERMAL_NAME_LENGTH) - return ERR_PTR(-EINVAL); - - if (trips > THERMAL_MAX_TRIPS || trips < 0) - return ERR_PTR(-EINVAL); - - if (!ops || !ops->get_temp) - return ERR_PTR(-EINVAL); - - tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); - if (!tz) - return ERR_PTR(-ENOMEM); - - INIT_LIST_HEAD(&tz->cooling_devices); - idr_init(&tz->idr); - mutex_init(&tz->lock); - result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); - if (result) { - kfree(tz); - return ERR_PTR(result); - } - - strcpy(tz->type, type); - tz->ops = ops; - tz->device.class = &thermal_class; - tz->devdata = devdata; - tz->trips = trips; - sprintf(tz->device.bus_id, "thermal_zone%d", tz->id); - result = device_register(&tz->device); - if (result) { - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); - kfree(tz); - return ERR_PTR(result); - } - - /* sys I/F */ - if (type) { - result = device_create_file(&tz->device, &dev_attr_type); - if (result) - goto unregister; - } - - result = device_create_file(&tz->device, &dev_attr_temp); - if (result) - goto unregister; - - if (ops->get_mode) { - result = device_create_file(&tz->device, &dev_attr_mode); - if (result) - goto unregister; - } - - for (count = 0; count < trips; count++) { - TRIP_POINT_ATTR_ADD(&tz->device, count, result); - if (result) - goto unregister; - } - - result = thermal_add_hwmon_sysfs(tz); - if (result) - goto unregister; - - mutex_lock(&thermal_list_lock); - list_add_tail(&tz->node, &thermal_tz_list); - if (ops->bind) - list_for_each_entry(pos, &thermal_cdev_list, node) { - result = ops->bind(tz, pos); - if (result) - break; - } - mutex_unlock(&thermal_list_lock); - - if (!result) - return tz; - - unregister: - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); - device_unregister(&tz->device); - return ERR_PTR(result); -} - -EXPORT_SYMBOL(thermal_zone_device_register); - -/** - * thermal_device_unregister - removes the registered thermal zone device - * @tz: the thermal zone device to remove - */ -void thermal_zone_device_unregister(struct thermal_zone_device *tz) -{ - struct thermal_cooling_device *cdev; - struct thermal_zone_device *pos = NULL; - int count; - - if (!tz) - return; - - mutex_lock(&thermal_list_lock); - list_for_each_entry(pos, &thermal_tz_list, node) - if (pos == tz) - break; - if (pos != tz) { - /* thermal zone device not found */ - mutex_unlock(&thermal_list_lock); - return; - } - list_del(&tz->node); - if (tz->ops->unbind) - list_for_each_entry(cdev, &thermal_cdev_list, node) - tz->ops->unbind(tz, cdev); - mutex_unlock(&thermal_list_lock); - - if (tz->type[0]) - device_remove_file(&tz->device, &dev_attr_type); - device_remove_file(&tz->device, &dev_attr_temp); - if (tz->ops->get_mode) - device_remove_file(&tz->device, &dev_attr_mode); - - for (count = 0; count < tz->trips; count++) - TRIP_POINT_ATTR_REMOVE(&tz->device, count); - - thermal_remove_hwmon_sysfs(tz); - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); - idr_destroy(&tz->idr); - mutex_destroy(&tz->lock); - device_unregister(&tz->device); - return; -} - -EXPORT_SYMBOL(thermal_zone_device_unregister); - -static int __init thermal_init(void) -{ - int result = 0; - - result = class_register(&thermal_class); - if (result) { - idr_destroy(&thermal_tz_idr); - idr_destroy(&thermal_cdev_idr); - mutex_destroy(&thermal_idr_lock); - mutex_destroy(&thermal_list_lock); - } - return result; -} - -static void __exit thermal_exit(void) -{ - class_unregister(&thermal_class); - idr_destroy(&thermal_tz_idr); - idr_destroy(&thermal_cdev_idr); - mutex_destroy(&thermal_idr_lock); - mutex_destroy(&thermal_list_lock); -} - -subsys_initcall(thermal_init); -module_exit(thermal_exit); diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c new file mode 100644 index 00000000000..6098787341f --- /dev/null +++ b/drivers/thermal/thermal_sys.c @@ -0,0 +1,899 @@ +/* + * thermal.c - Generic Thermal Management Sysfs support. + * + * Copyright (C) 2008 Intel Corp + * Copyright (C) 2008 Zhang Rui + * Copyright (C) 2008 Sujith Thomas + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Zhang Rui"); +MODULE_DESCRIPTION("Generic thermal management sysfs support"); +MODULE_LICENSE("GPL"); + +#define PREFIX "Thermal: " + +struct thermal_cooling_device_instance { + int id; + char name[THERMAL_NAME_LENGTH]; + struct thermal_zone_device *tz; + struct thermal_cooling_device *cdev; + int trip; + char attr_name[THERMAL_NAME_LENGTH]; + struct device_attribute attr; + struct list_head node; +}; + +static DEFINE_IDR(thermal_tz_idr); +static DEFINE_IDR(thermal_cdev_idr); +static DEFINE_MUTEX(thermal_idr_lock); + +static LIST_HEAD(thermal_tz_list); +static LIST_HEAD(thermal_cdev_list); +static DEFINE_MUTEX(thermal_list_lock); + +static int get_idr(struct idr *idr, struct mutex *lock, int *id) +{ + int err; + + again: + if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) + return -ENOMEM; + + if (lock) + mutex_lock(lock); + err = idr_get_new(idr, NULL, id); + if (lock) + mutex_unlock(lock); + if (unlikely(err == -EAGAIN)) + goto again; + else if (unlikely(err)) + return err; + + *id = *id & MAX_ID_MASK; + return 0; +} + +static void release_idr(struct idr *idr, struct mutex *lock, int id) +{ + if (lock) + mutex_lock(lock); + idr_remove(idr, id); + if (lock) + mutex_unlock(lock); +} + +/* sys I/F for thermal zone */ + +#define to_thermal_zone(_dev) \ + container_of(_dev, struct thermal_zone_device, device) + +static ssize_t +type_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + + return sprintf(buf, "%s\n", tz->type); +} + +static ssize_t +temp_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + + if (!tz->ops->get_temp) + return -EPERM; + + return tz->ops->get_temp(tz, buf); +} + +static ssize_t +mode_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + + if (!tz->ops->get_mode) + return -EPERM; + + return tz->ops->get_mode(tz, buf); +} + +static ssize_t +mode_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + int result; + + if (!tz->ops->set_mode) + return -EPERM; + + result = tz->ops->set_mode(tz, buf); + if (result) + return result; + + return count; +} + +static ssize_t +trip_point_type_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + int trip; + + if (!tz->ops->get_trip_type) + return -EPERM; + + if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) + return -EINVAL; + + return tz->ops->get_trip_type(tz, trip, buf); +} + +static ssize_t +trip_point_temp_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + int trip; + + if (!tz->ops->get_trip_temp) + return -EPERM; + + if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) + return -EINVAL; + + return tz->ops->get_trip_temp(tz, trip, buf); +} + +static DEVICE_ATTR(type, 0444, type_show, NULL); +static DEVICE_ATTR(temp, 0444, temp_show, NULL); +static DEVICE_ATTR(mode, 0644, mode_show, mode_store); + +static struct device_attribute trip_point_attrs[] = { + __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), + __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), + __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), +}; + +#define TRIP_POINT_ATTR_ADD(_dev, _index, result) \ +do { \ + result = device_create_file(_dev, \ + &trip_point_attrs[_index * 2]); \ + if (result) \ + break; \ + result = device_create_file(_dev, \ + &trip_point_attrs[_index * 2 + 1]); \ +} while (0) + +#define TRIP_POINT_ATTR_REMOVE(_dev, _index) \ +do { \ + device_remove_file(_dev, &trip_point_attrs[_index * 2]); \ + device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \ +} while (0) + +/* sys I/F for cooling device */ +#define to_cooling_device(_dev) \ + container_of(_dev, struct thermal_cooling_device, device) + +static ssize_t +thermal_cooling_device_type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct thermal_cooling_device *cdev = to_cooling_device(dev); + + return sprintf(buf, "%s\n", cdev->type); +} + +static ssize_t +thermal_cooling_device_max_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct thermal_cooling_device *cdev = to_cooling_device(dev); + + return cdev->ops->get_max_state(cdev, buf); +} + +static ssize_t +thermal_cooling_device_cur_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct thermal_cooling_device *cdev = to_cooling_device(dev); + + return cdev->ops->get_cur_state(cdev, buf); +} + +static ssize_t +thermal_cooling_device_cur_state_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct thermal_cooling_device *cdev = to_cooling_device(dev); + int state; + int result; + + if (!sscanf(buf, "%d\n", &state)) + return -EINVAL; + + if (state < 0) + return -EINVAL; + + result = cdev->ops->set_cur_state(cdev, state); + if (result) + return result; + return count; +} + +static struct device_attribute dev_attr_cdev_type = +__ATTR(type, 0444, thermal_cooling_device_type_show, NULL); +static DEVICE_ATTR(max_state, 0444, + thermal_cooling_device_max_state_show, NULL); +static DEVICE_ATTR(cur_state, 0644, + thermal_cooling_device_cur_state_show, + thermal_cooling_device_cur_state_store); + +static ssize_t +thermal_cooling_device_trip_point_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct thermal_cooling_device_instance *instance; + + instance = + container_of(attr, struct thermal_cooling_device_instance, attr); + + if (instance->trip == THERMAL_TRIPS_NONE) + return sprintf(buf, "-1\n"); + else + return sprintf(buf, "%d\n", instance->trip); +} + +/* Device management */ + +#if defined(CONFIG_HWMON) || \ + (defined(CONFIG_HWMON_MODULE) && defined(CONFIG_THERMAL_MODULE)) +/* hwmon sys I/F */ +#include +static LIST_HEAD(thermal_hwmon_list); + +static ssize_t +name_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct thermal_hwmon_device *hwmon = dev->driver_data; + return sprintf(buf, "%s\n", hwmon->type); +} +static DEVICE_ATTR(name, 0444, name_show, NULL); + +static ssize_t +temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct thermal_hwmon_attr *hwmon_attr + = container_of(attr, struct thermal_hwmon_attr, attr); + struct thermal_zone_device *tz + = container_of(hwmon_attr, struct thermal_zone_device, + temp_input); + + return tz->ops->get_temp(tz, buf); +} + +static ssize_t +temp_crit_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct thermal_hwmon_attr *hwmon_attr + = container_of(attr, struct thermal_hwmon_attr, attr); + struct thermal_zone_device *tz + = container_of(hwmon_attr, struct thermal_zone_device, + temp_crit); + + return tz->ops->get_trip_temp(tz, 0, buf); +} + + +static int +thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) +{ + struct thermal_hwmon_device *hwmon; + int new_hwmon_device = 1; + int result; + + mutex_lock(&thermal_list_lock); + list_for_each_entry(hwmon, &thermal_hwmon_list, node) + if (!strcmp(hwmon->type, tz->type)) { + new_hwmon_device = 0; + mutex_unlock(&thermal_list_lock); + goto register_sys_interface; + } + mutex_unlock(&thermal_list_lock); + + hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); + if (!hwmon) + return -ENOMEM; + + INIT_LIST_HEAD(&hwmon->tz_list); + strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); + hwmon->device = hwmon_device_register(NULL); + if (IS_ERR(hwmon->device)) { + result = PTR_ERR(hwmon->device); + goto free_mem; + } + hwmon->device->driver_data = hwmon; + result = device_create_file(hwmon->device, &dev_attr_name); + if (result) + goto unregister_hwmon_device; + + register_sys_interface: + tz->hwmon = hwmon; + hwmon->count++; + + snprintf(tz->temp_input.name, THERMAL_NAME_LENGTH, + "temp%d_input", hwmon->count); + tz->temp_input.attr.attr.name = tz->temp_input.name; + tz->temp_input.attr.attr.mode = 0444; + tz->temp_input.attr.show = temp_input_show; + result = device_create_file(hwmon->device, &tz->temp_input.attr); + if (result) + goto unregister_hwmon_device; + + if (tz->ops->get_crit_temp) { + unsigned long temperature; + if (!tz->ops->get_crit_temp(tz, &temperature)) { + snprintf(tz->temp_crit.name, THERMAL_NAME_LENGTH, + "temp%d_crit", hwmon->count); + tz->temp_crit.attr.attr.name = tz->temp_crit.name; + tz->temp_crit.attr.attr.mode = 0444; + tz->temp_crit.attr.show = temp_crit_show; + result = device_create_file(hwmon->device, + &tz->temp_crit.attr); + if (result) + goto unregister_hwmon_device; + } + } + + mutex_lock(&thermal_list_lock); + if (new_hwmon_device) + list_add_tail(&hwmon->node, &thermal_hwmon_list); + list_add_tail(&tz->hwmon_node, &hwmon->tz_list); + mutex_unlock(&thermal_list_lock); + + return 0; + + unregister_hwmon_device: + device_remove_file(hwmon->device, &tz->temp_crit.attr); + device_remove_file(hwmon->device, &tz->temp_input.attr); + if (new_hwmon_device) { + device_remove_file(hwmon->device, &dev_attr_name); + hwmon_device_unregister(hwmon->device); + } + free_mem: + if (new_hwmon_device) + kfree(hwmon); + + return result; +} + +static void +thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) +{ + struct thermal_hwmon_device *hwmon = tz->hwmon; + + tz->hwmon = NULL; + device_remove_file(hwmon->device, &tz->temp_input.attr); + device_remove_file(hwmon->device, &tz->temp_crit.attr); + + mutex_lock(&thermal_list_lock); + list_del(&tz->hwmon_node); + if (!list_empty(&hwmon->tz_list)) { + mutex_unlock(&thermal_list_lock); + return; + } + list_del(&hwmon->node); + mutex_unlock(&thermal_list_lock); + + device_remove_file(hwmon->device, &dev_attr_name); + hwmon_device_unregister(hwmon->device); + kfree(hwmon); +} +#else +static int +thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) +{ + return 0; +} + +static void +thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) +{ +} +#endif + + +/** + * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone + * @tz: thermal zone device + * @trip: indicates which trip point the cooling devices is + * associated with in this thermal zone. + * @cdev: thermal cooling device + * + * This function is usually called in the thermal zone device .bind callback. + */ +int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, + int trip, + struct thermal_cooling_device *cdev) +{ + struct thermal_cooling_device_instance *dev; + struct thermal_cooling_device_instance *pos; + struct thermal_zone_device *pos1; + struct thermal_cooling_device *pos2; + int result; + + if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) + return -EINVAL; + + list_for_each_entry(pos1, &thermal_tz_list, node) { + if (pos1 == tz) + break; + } + list_for_each_entry(pos2, &thermal_cdev_list, node) { + if (pos2 == cdev) + break; + } + + if (tz != pos1 || cdev != pos2) + return -EINVAL; + + dev = + kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); + if (!dev) + return -ENOMEM; + dev->tz = tz; + dev->cdev = cdev; + dev->trip = trip; + result = get_idr(&tz->idr, &tz->lock, &dev->id); + if (result) + goto free_mem; + + sprintf(dev->name, "cdev%d", dev->id); + result = + sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); + if (result) + goto release_idr; + + sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); + dev->attr.attr.name = dev->attr_name; + dev->attr.attr.mode = 0444; + dev->attr.show = thermal_cooling_device_trip_point_show; + result = device_create_file(&tz->device, &dev->attr); + if (result) + goto remove_symbol_link; + + mutex_lock(&tz->lock); + list_for_each_entry(pos, &tz->cooling_devices, node) + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { + result = -EEXIST; + break; + } + if (!result) + list_add_tail(&dev->node, &tz->cooling_devices); + mutex_unlock(&tz->lock); + + if (!result) + return 0; + + device_remove_file(&tz->device, &dev->attr); + remove_symbol_link: + sysfs_remove_link(&tz->device.kobj, dev->name); + release_idr: + release_idr(&tz->idr, &tz->lock, dev->id); + free_mem: + kfree(dev); + return result; +} + +EXPORT_SYMBOL(thermal_zone_bind_cooling_device); + +/** + * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone + * @tz: thermal zone device + * @trip: indicates which trip point the cooling devices is + * associated with in this thermal zone. + * @cdev: thermal cooling device + * + * This function is usually called in the thermal zone device .unbind callback. + */ +int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, + int trip, + struct thermal_cooling_device *cdev) +{ + struct thermal_cooling_device_instance *pos, *next; + + mutex_lock(&tz->lock); + list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { + list_del(&pos->node); + mutex_unlock(&tz->lock); + goto unbind; + } + } + mutex_unlock(&tz->lock); + + return -ENODEV; + + unbind: + device_remove_file(&tz->device, &pos->attr); + sysfs_remove_link(&tz->device.kobj, pos->name); + release_idr(&tz->idr, &tz->lock, pos->id); + kfree(pos); + return 0; +} + +EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); + +static void thermal_release(struct device *dev) +{ + struct thermal_zone_device *tz; + struct thermal_cooling_device *cdev; + + if (!strncmp(dev->bus_id, "thermal_zone", sizeof "thermal_zone" - 1)) { + tz = to_thermal_zone(dev); + kfree(tz); + } else { + cdev = to_cooling_device(dev); + kfree(cdev); + } +} + +static struct class thermal_class = { + .name = "thermal", + .dev_release = thermal_release, +}; + +/** + * thermal_cooling_device_register - register a new thermal cooling device + * @type: the thermal cooling device type. + * @devdata: device private data. + * @ops: standard thermal cooling devices callbacks. + */ +struct thermal_cooling_device *thermal_cooling_device_register(char *type, + void *devdata, + struct + thermal_cooling_device_ops + *ops) +{ + struct thermal_cooling_device *cdev; + struct thermal_zone_device *pos; + int result; + + if (strlen(type) >= THERMAL_NAME_LENGTH) + return ERR_PTR(-EINVAL); + + if (!ops || !ops->get_max_state || !ops->get_cur_state || + !ops->set_cur_state) + return ERR_PTR(-EINVAL); + + cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); + if (!cdev) + return ERR_PTR(-ENOMEM); + + result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); + if (result) { + kfree(cdev); + return ERR_PTR(result); + } + + strcpy(cdev->type, type); + cdev->ops = ops; + cdev->device.class = &thermal_class; + cdev->devdata = devdata; + sprintf(cdev->device.bus_id, "cooling_device%d", cdev->id); + result = device_register(&cdev->device); + if (result) { + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); + kfree(cdev); + return ERR_PTR(result); + } + + /* sys I/F */ + if (type) { + result = device_create_file(&cdev->device, &dev_attr_cdev_type); + if (result) + goto unregister; + } + + result = device_create_file(&cdev->device, &dev_attr_max_state); + if (result) + goto unregister; + + result = device_create_file(&cdev->device, &dev_attr_cur_state); + if (result) + goto unregister; + + mutex_lock(&thermal_list_lock); + list_add(&cdev->node, &thermal_cdev_list); + list_for_each_entry(pos, &thermal_tz_list, node) { + if (!pos->ops->bind) + continue; + result = pos->ops->bind(pos, cdev); + if (result) + break; + + } + mutex_unlock(&thermal_list_lock); + + if (!result) + return cdev; + + unregister: + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); + device_unregister(&cdev->device); + return ERR_PTR(result); +} + +EXPORT_SYMBOL(thermal_cooling_device_register); + +/** + * thermal_cooling_device_unregister - removes the registered thermal cooling device + * @cdev: the thermal cooling device to remove. + * + * thermal_cooling_device_unregister() must be called when the device is no + * longer needed. + */ +void thermal_cooling_device_unregister(struct + thermal_cooling_device + *cdev) +{ + struct thermal_zone_device *tz; + struct thermal_cooling_device *pos = NULL; + + if (!cdev) + return; + + mutex_lock(&thermal_list_lock); + list_for_each_entry(pos, &thermal_cdev_list, node) + if (pos == cdev) + break; + if (pos != cdev) { + /* thermal cooling device not found */ + mutex_unlock(&thermal_list_lock); + return; + } + list_del(&cdev->node); + list_for_each_entry(tz, &thermal_tz_list, node) { + if (!tz->ops->unbind) + continue; + tz->ops->unbind(tz, cdev); + } + mutex_unlock(&thermal_list_lock); + if (cdev->type[0]) + device_remove_file(&cdev->device, &dev_attr_cdev_type); + device_remove_file(&cdev->device, &dev_attr_max_state); + device_remove_file(&cdev->device, &dev_attr_cur_state); + + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); + device_unregister(&cdev->device); + return; +} + +EXPORT_SYMBOL(thermal_cooling_device_unregister); + +/** + * thermal_zone_device_register - register a new thermal zone device + * @type: the thermal zone device type + * @trips: the number of trip points the thermal zone support + * @devdata: private device data + * @ops: standard thermal zone device callbacks + * + * thermal_zone_device_unregister() must be called when the device is no + * longer needed. + */ +struct thermal_zone_device *thermal_zone_device_register(char *type, + int trips, + void *devdata, struct + thermal_zone_device_ops + *ops) +{ + struct thermal_zone_device *tz; + struct thermal_cooling_device *pos; + int result; + int count; + + if (strlen(type) >= THERMAL_NAME_LENGTH) + return ERR_PTR(-EINVAL); + + if (trips > THERMAL_MAX_TRIPS || trips < 0) + return ERR_PTR(-EINVAL); + + if (!ops || !ops->get_temp) + return ERR_PTR(-EINVAL); + + tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); + if (!tz) + return ERR_PTR(-ENOMEM); + + INIT_LIST_HEAD(&tz->cooling_devices); + idr_init(&tz->idr); + mutex_init(&tz->lock); + result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); + if (result) { + kfree(tz); + return ERR_PTR(result); + } + + strcpy(tz->type, type); + tz->ops = ops; + tz->device.class = &thermal_class; + tz->devdata = devdata; + tz->trips = trips; + sprintf(tz->device.bus_id, "thermal_zone%d", tz->id); + result = device_register(&tz->device); + if (result) { + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); + kfree(tz); + return ERR_PTR(result); + } + + /* sys I/F */ + if (type) { + result = device_create_file(&tz->device, &dev_attr_type); + if (result) + goto unregister; + } + + result = device_create_file(&tz->device, &dev_attr_temp); + if (result) + goto unregister; + + if (ops->get_mode) { + result = device_create_file(&tz->device, &dev_attr_mode); + if (result) + goto unregister; + } + + for (count = 0; count < trips; count++) { + TRIP_POINT_ATTR_ADD(&tz->device, count, result); + if (result) + goto unregister; + } + + result = thermal_add_hwmon_sysfs(tz); + if (result) + goto unregister; + + mutex_lock(&thermal_list_lock); + list_add_tail(&tz->node, &thermal_tz_list); + if (ops->bind) + list_for_each_entry(pos, &thermal_cdev_list, node) { + result = ops->bind(tz, pos); + if (result) + break; + } + mutex_unlock(&thermal_list_lock); + + if (!result) + return tz; + + unregister: + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); + device_unregister(&tz->device); + return ERR_PTR(result); +} + +EXPORT_SYMBOL(thermal_zone_device_register); + +/** + * thermal_device_unregister - removes the registered thermal zone device + * @tz: the thermal zone device to remove + */ +void thermal_zone_device_unregister(struct thermal_zone_device *tz) +{ + struct thermal_cooling_device *cdev; + struct thermal_zone_device *pos = NULL; + int count; + + if (!tz) + return; + + mutex_lock(&thermal_list_lock); + list_for_each_entry(pos, &thermal_tz_list, node) + if (pos == tz) + break; + if (pos != tz) { + /* thermal zone device not found */ + mutex_unlock(&thermal_list_lock); + return; + } + list_del(&tz->node); + if (tz->ops->unbind) + list_for_each_entry(cdev, &thermal_cdev_list, node) + tz->ops->unbind(tz, cdev); + mutex_unlock(&thermal_list_lock); + + if (tz->type[0]) + device_remove_file(&tz->device, &dev_attr_type); + device_remove_file(&tz->device, &dev_attr_temp); + if (tz->ops->get_mode) + device_remove_file(&tz->device, &dev_attr_mode); + + for (count = 0; count < tz->trips; count++) + TRIP_POINT_ATTR_REMOVE(&tz->device, count); + + thermal_remove_hwmon_sysfs(tz); + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); + idr_destroy(&tz->idr); + mutex_destroy(&tz->lock); + device_unregister(&tz->device); + return; +} + +EXPORT_SYMBOL(thermal_zone_device_unregister); + +static int __init thermal_init(void) +{ + int result = 0; + + result = class_register(&thermal_class); + if (result) { + idr_destroy(&thermal_tz_idr); + idr_destroy(&thermal_cdev_idr); + mutex_destroy(&thermal_idr_lock); + mutex_destroy(&thermal_list_lock); + } + return result; +} + +static void __exit thermal_exit(void) +{ + class_unregister(&thermal_class); + idr_destroy(&thermal_tz_idr); + idr_destroy(&thermal_cdev_idr); + mutex_destroy(&thermal_idr_lock); + mutex_destroy(&thermal_list_lock); +} + +subsys_initcall(thermal_init); +module_exit(thermal_exit); -- cgit