Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1 | /* |
| 2 | * thermal.c - Generic Thermal Management Sysfs support. |
| 3 | * |
| 4 | * Copyright (C) 2008 Intel Corp |
| 5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> |
| 6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> |
| 7 | * |
| 8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; version 2 of the License. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 22 | * |
| 23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/err.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 30 | #include <linux/kdev_t.h> |
| 31 | #include <linux/idr.h> |
| 32 | #include <linux/thermal.h> |
| 33 | #include <linux/spinlock.h> |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 34 | #include <linux/reboot.h> |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 35 | #include <net/netlink.h> |
| 36 | #include <net/genetlink.h> |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 37 | |
Zhang Rui | 63c4ec9 | 2008-04-21 16:07:13 +0800 | [diff] [blame] | 38 | MODULE_AUTHOR("Zhang Rui"); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 39 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
| 40 | MODULE_LICENSE("GPL"); |
| 41 | |
| 42 | #define PREFIX "Thermal: " |
| 43 | |
| 44 | struct thermal_cooling_device_instance { |
| 45 | int id; |
| 46 | char name[THERMAL_NAME_LENGTH]; |
| 47 | struct thermal_zone_device *tz; |
| 48 | struct thermal_cooling_device *cdev; |
| 49 | int trip; |
| 50 | char attr_name[THERMAL_NAME_LENGTH]; |
| 51 | struct device_attribute attr; |
| 52 | struct list_head node; |
| 53 | }; |
| 54 | |
| 55 | static DEFINE_IDR(thermal_tz_idr); |
| 56 | static DEFINE_IDR(thermal_cdev_idr); |
| 57 | static DEFINE_MUTEX(thermal_idr_lock); |
| 58 | |
| 59 | static LIST_HEAD(thermal_tz_list); |
| 60 | static LIST_HEAD(thermal_cdev_list); |
| 61 | static DEFINE_MUTEX(thermal_list_lock); |
| 62 | |
| 63 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) |
| 64 | { |
| 65 | int err; |
| 66 | |
| 67 | again: |
| 68 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) |
| 69 | return -ENOMEM; |
| 70 | |
| 71 | if (lock) |
| 72 | mutex_lock(lock); |
| 73 | err = idr_get_new(idr, NULL, id); |
| 74 | if (lock) |
| 75 | mutex_unlock(lock); |
| 76 | if (unlikely(err == -EAGAIN)) |
| 77 | goto again; |
| 78 | else if (unlikely(err)) |
| 79 | return err; |
| 80 | |
| 81 | *id = *id & MAX_ID_MASK; |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static void release_idr(struct idr *idr, struct mutex *lock, int id) |
| 86 | { |
| 87 | if (lock) |
| 88 | mutex_lock(lock); |
| 89 | idr_remove(idr, id); |
| 90 | if (lock) |
| 91 | mutex_unlock(lock); |
| 92 | } |
| 93 | |
| 94 | /* sys I/F for thermal zone */ |
| 95 | |
| 96 | #define to_thermal_zone(_dev) \ |
| 97 | container_of(_dev, struct thermal_zone_device, device) |
| 98 | |
| 99 | static ssize_t |
| 100 | type_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 101 | { |
| 102 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
| 103 | |
| 104 | return sprintf(buf, "%s\n", tz->type); |
| 105 | } |
| 106 | |
| 107 | static ssize_t |
| 108 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 109 | { |
| 110 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 111 | long temperature; |
| 112 | int ret; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 113 | |
| 114 | if (!tz->ops->get_temp) |
| 115 | return -EPERM; |
| 116 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 117 | ret = tz->ops->get_temp(tz, &temperature); |
| 118 | |
| 119 | if (ret) |
| 120 | return ret; |
| 121 | |
| 122 | return sprintf(buf, "%ld\n", temperature); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | static ssize_t |
| 126 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 127 | { |
| 128 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 129 | enum thermal_device_mode mode; |
| 130 | int result; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 131 | |
| 132 | if (!tz->ops->get_mode) |
| 133 | return -EPERM; |
| 134 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 135 | result = tz->ops->get_mode(tz, &mode); |
| 136 | if (result) |
| 137 | return result; |
| 138 | |
| 139 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" |
| 140 | : "disabled"); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | static ssize_t |
| 144 | mode_store(struct device *dev, struct device_attribute *attr, |
| 145 | const char *buf, size_t count) |
| 146 | { |
| 147 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
| 148 | int result; |
| 149 | |
| 150 | if (!tz->ops->set_mode) |
| 151 | return -EPERM; |
| 152 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 153 | if (!strncmp(buf, "enabled", sizeof("enabled"))) |
| 154 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
| 155 | else if (!strncmp(buf, "disabled", sizeof("disabled"))) |
| 156 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
| 157 | else |
| 158 | result = -EINVAL; |
| 159 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 160 | if (result) |
| 161 | return result; |
| 162 | |
| 163 | return count; |
| 164 | } |
| 165 | |
| 166 | static ssize_t |
| 167 | trip_point_type_show(struct device *dev, struct device_attribute *attr, |
| 168 | char *buf) |
| 169 | { |
| 170 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 171 | enum thermal_trip_type type; |
| 172 | int trip, result; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 173 | |
| 174 | if (!tz->ops->get_trip_type) |
| 175 | return -EPERM; |
| 176 | |
| 177 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) |
| 178 | return -EINVAL; |
| 179 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 180 | result = tz->ops->get_trip_type(tz, trip, &type); |
| 181 | if (result) |
| 182 | return result; |
| 183 | |
| 184 | switch (type) { |
| 185 | case THERMAL_TRIP_CRITICAL: |
Amit Kucheria | 625120a4 | 2009-10-16 12:46:02 +0300 | [diff] [blame] | 186 | return sprintf(buf, "critical\n"); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 187 | case THERMAL_TRIP_HOT: |
Amit Kucheria | 625120a4 | 2009-10-16 12:46:02 +0300 | [diff] [blame] | 188 | return sprintf(buf, "hot\n"); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 189 | case THERMAL_TRIP_PASSIVE: |
Amit Kucheria | 625120a4 | 2009-10-16 12:46:02 +0300 | [diff] [blame] | 190 | return sprintf(buf, "passive\n"); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 191 | case THERMAL_TRIP_ACTIVE: |
Amit Kucheria | 625120a4 | 2009-10-16 12:46:02 +0300 | [diff] [blame] | 192 | return sprintf(buf, "active\n"); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 193 | default: |
Amit Kucheria | 625120a4 | 2009-10-16 12:46:02 +0300 | [diff] [blame] | 194 | return sprintf(buf, "unknown\n"); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 195 | } |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | static ssize_t |
| 199 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, |
| 200 | char *buf) |
| 201 | { |
| 202 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 203 | int trip, ret; |
| 204 | long temperature; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 205 | |
| 206 | if (!tz->ops->get_trip_temp) |
| 207 | return -EPERM; |
| 208 | |
| 209 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) |
| 210 | return -EINVAL; |
| 211 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 212 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
| 213 | |
| 214 | if (ret) |
| 215 | return ret; |
| 216 | |
| 217 | return sprintf(buf, "%ld\n", temperature); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 218 | } |
| 219 | |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 220 | static ssize_t |
| 221 | passive_store(struct device *dev, struct device_attribute *attr, |
| 222 | const char *buf, size_t count) |
| 223 | { |
| 224 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
| 225 | struct thermal_cooling_device *cdev = NULL; |
| 226 | int state; |
| 227 | |
| 228 | if (!sscanf(buf, "%d\n", &state)) |
| 229 | return -EINVAL; |
| 230 | |
Frans Pop | 3d8e3ad | 2009-10-26 08:39:02 +0100 | [diff] [blame] | 231 | /* sanity check: values below 1000 millicelcius don't make sense |
| 232 | * and can cause the system to go into a thermal heart attack |
| 233 | */ |
| 234 | if (state && state < 1000) |
| 235 | return -EINVAL; |
| 236 | |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 237 | if (state && !tz->forced_passive) { |
| 238 | mutex_lock(&thermal_list_lock); |
| 239 | list_for_each_entry(cdev, &thermal_cdev_list, node) { |
| 240 | if (!strncmp("Processor", cdev->type, |
| 241 | sizeof("Processor"))) |
| 242 | thermal_zone_bind_cooling_device(tz, |
| 243 | THERMAL_TRIPS_NONE, |
| 244 | cdev); |
| 245 | } |
| 246 | mutex_unlock(&thermal_list_lock); |
Frans Pop | e4143b0 | 2009-10-26 08:39:03 +0100 | [diff] [blame] | 247 | if (!tz->passive_delay) |
| 248 | tz->passive_delay = 1000; |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 249 | } else if (!state && tz->forced_passive) { |
| 250 | mutex_lock(&thermal_list_lock); |
| 251 | list_for_each_entry(cdev, &thermal_cdev_list, node) { |
| 252 | if (!strncmp("Processor", cdev->type, |
| 253 | sizeof("Processor"))) |
| 254 | thermal_zone_unbind_cooling_device(tz, |
| 255 | THERMAL_TRIPS_NONE, |
| 256 | cdev); |
| 257 | } |
| 258 | mutex_unlock(&thermal_list_lock); |
Frans Pop | e4143b0 | 2009-10-26 08:39:03 +0100 | [diff] [blame] | 259 | tz->passive_delay = 0; |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | tz->tc1 = 1; |
| 263 | tz->tc2 = 1; |
| 264 | |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 265 | tz->forced_passive = state; |
| 266 | |
| 267 | thermal_zone_device_update(tz); |
| 268 | |
| 269 | return count; |
| 270 | } |
| 271 | |
| 272 | static ssize_t |
| 273 | passive_show(struct device *dev, struct device_attribute *attr, |
| 274 | char *buf) |
| 275 | { |
| 276 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
| 277 | |
| 278 | return sprintf(buf, "%d\n", tz->forced_passive); |
| 279 | } |
| 280 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 281 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
| 282 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); |
| 283 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); |
Joe Perches | 886ee54 | 2012-03-21 12:55:01 -0700 | [diff] [blame^] | 284 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 285 | |
| 286 | static struct device_attribute trip_point_attrs[] = { |
| 287 | __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), |
| 288 | __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), |
| 289 | __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), |
| 290 | __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), |
| 291 | __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), |
| 292 | __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), |
| 293 | __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), |
| 294 | __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), |
| 295 | __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), |
| 296 | __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), |
| 297 | __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), |
| 298 | __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), |
| 299 | __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), |
| 300 | __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), |
| 301 | __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), |
| 302 | __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), |
| 303 | __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), |
| 304 | __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), |
| 305 | __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), |
| 306 | __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), |
Krzysztof Helt | 5f1a3f2 | 2008-04-15 14:34:47 -0700 | [diff] [blame] | 307 | __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), |
| 308 | __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), |
| 309 | __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), |
| 310 | __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 311 | }; |
| 312 | |
| 313 | #define TRIP_POINT_ATTR_ADD(_dev, _index, result) \ |
| 314 | do { \ |
| 315 | result = device_create_file(_dev, \ |
| 316 | &trip_point_attrs[_index * 2]); \ |
| 317 | if (result) \ |
| 318 | break; \ |
| 319 | result = device_create_file(_dev, \ |
| 320 | &trip_point_attrs[_index * 2 + 1]); \ |
| 321 | } while (0) |
| 322 | |
| 323 | #define TRIP_POINT_ATTR_REMOVE(_dev, _index) \ |
| 324 | do { \ |
| 325 | device_remove_file(_dev, &trip_point_attrs[_index * 2]); \ |
| 326 | device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \ |
| 327 | } while (0) |
| 328 | |
| 329 | /* sys I/F for cooling device */ |
| 330 | #define to_cooling_device(_dev) \ |
| 331 | container_of(_dev, struct thermal_cooling_device, device) |
| 332 | |
| 333 | static ssize_t |
| 334 | thermal_cooling_device_type_show(struct device *dev, |
| 335 | struct device_attribute *attr, char *buf) |
| 336 | { |
| 337 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
| 338 | |
| 339 | return sprintf(buf, "%s\n", cdev->type); |
| 340 | } |
| 341 | |
| 342 | static ssize_t |
| 343 | thermal_cooling_device_max_state_show(struct device *dev, |
| 344 | struct device_attribute *attr, char *buf) |
| 345 | { |
| 346 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 347 | unsigned long state; |
| 348 | int ret; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 349 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 350 | ret = cdev->ops->get_max_state(cdev, &state); |
| 351 | if (ret) |
| 352 | return ret; |
| 353 | return sprintf(buf, "%ld\n", state); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | static ssize_t |
| 357 | thermal_cooling_device_cur_state_show(struct device *dev, |
| 358 | struct device_attribute *attr, char *buf) |
| 359 | { |
| 360 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 361 | unsigned long state; |
| 362 | int ret; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 363 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 364 | ret = cdev->ops->get_cur_state(cdev, &state); |
| 365 | if (ret) |
| 366 | return ret; |
| 367 | return sprintf(buf, "%ld\n", state); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | static ssize_t |
| 371 | thermal_cooling_device_cur_state_store(struct device *dev, |
| 372 | struct device_attribute *attr, |
| 373 | const char *buf, size_t count) |
| 374 | { |
| 375 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 376 | unsigned long state; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 377 | int result; |
| 378 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 379 | if (!sscanf(buf, "%ld\n", &state)) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 380 | return -EINVAL; |
| 381 | |
Roel Kluin | edb9491 | 2009-12-15 22:46:50 +0100 | [diff] [blame] | 382 | if ((long)state < 0) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 383 | return -EINVAL; |
| 384 | |
| 385 | result = cdev->ops->set_cur_state(cdev, state); |
| 386 | if (result) |
| 387 | return result; |
| 388 | return count; |
| 389 | } |
| 390 | |
| 391 | static struct device_attribute dev_attr_cdev_type = |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 392 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 393 | static DEVICE_ATTR(max_state, 0444, |
| 394 | thermal_cooling_device_max_state_show, NULL); |
| 395 | static DEVICE_ATTR(cur_state, 0644, |
| 396 | thermal_cooling_device_cur_state_show, |
| 397 | thermal_cooling_device_cur_state_store); |
| 398 | |
| 399 | static ssize_t |
| 400 | thermal_cooling_device_trip_point_show(struct device *dev, |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 401 | struct device_attribute *attr, char *buf) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 402 | { |
| 403 | struct thermal_cooling_device_instance *instance; |
| 404 | |
| 405 | instance = |
| 406 | container_of(attr, struct thermal_cooling_device_instance, attr); |
| 407 | |
| 408 | if (instance->trip == THERMAL_TRIPS_NONE) |
| 409 | return sprintf(buf, "-1\n"); |
| 410 | else |
| 411 | return sprintf(buf, "%d\n", instance->trip); |
| 412 | } |
| 413 | |
| 414 | /* Device management */ |
| 415 | |
Rene Herman | 16d7523 | 2008-06-24 19:38:56 +0200 | [diff] [blame] | 416 | #if defined(CONFIG_THERMAL_HWMON) |
| 417 | |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 418 | /* hwmon sys I/F */ |
| 419 | #include <linux/hwmon.h> |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 420 | |
| 421 | /* thermal zone devices with the same type share one hwmon device */ |
| 422 | struct thermal_hwmon_device { |
| 423 | char type[THERMAL_NAME_LENGTH]; |
| 424 | struct device *device; |
| 425 | int count; |
| 426 | struct list_head tz_list; |
| 427 | struct list_head node; |
| 428 | }; |
| 429 | |
| 430 | struct thermal_hwmon_attr { |
| 431 | struct device_attribute attr; |
| 432 | char name[16]; |
| 433 | }; |
| 434 | |
| 435 | /* one temperature input for each thermal zone */ |
| 436 | struct thermal_hwmon_temp { |
| 437 | struct list_head hwmon_node; |
| 438 | struct thermal_zone_device *tz; |
| 439 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ |
| 440 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ |
| 441 | }; |
| 442 | |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 443 | static LIST_HEAD(thermal_hwmon_list); |
| 444 | |
| 445 | static ssize_t |
| 446 | name_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 447 | { |
Greg Kroah-Hartman | 0e968a3 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 448 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 449 | return sprintf(buf, "%s\n", hwmon->type); |
| 450 | } |
| 451 | static DEVICE_ATTR(name, 0444, name_show, NULL); |
| 452 | |
| 453 | static ssize_t |
| 454 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 455 | { |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 456 | long temperature; |
| 457 | int ret; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 458 | struct thermal_hwmon_attr *hwmon_attr |
| 459 | = container_of(attr, struct thermal_hwmon_attr, attr); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 460 | struct thermal_hwmon_temp *temp |
| 461 | = container_of(hwmon_attr, struct thermal_hwmon_temp, |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 462 | temp_input); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 463 | struct thermal_zone_device *tz = temp->tz; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 464 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 465 | ret = tz->ops->get_temp(tz, &temperature); |
| 466 | |
| 467 | if (ret) |
| 468 | return ret; |
| 469 | |
| 470 | return sprintf(buf, "%ld\n", temperature); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | static ssize_t |
| 474 | temp_crit_show(struct device *dev, struct device_attribute *attr, |
| 475 | char *buf) |
| 476 | { |
| 477 | struct thermal_hwmon_attr *hwmon_attr |
| 478 | = container_of(attr, struct thermal_hwmon_attr, attr); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 479 | struct thermal_hwmon_temp *temp |
| 480 | = container_of(hwmon_attr, struct thermal_hwmon_temp, |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 481 | temp_crit); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 482 | struct thermal_zone_device *tz = temp->tz; |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 483 | long temperature; |
| 484 | int ret; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 485 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 486 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); |
| 487 | if (ret) |
| 488 | return ret; |
| 489 | |
| 490 | return sprintf(buf, "%ld\n", temperature); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | |
Jean Delvare | 0d97d7a | 2011-07-28 13:48:41 -0700 | [diff] [blame] | 494 | static struct thermal_hwmon_device * |
| 495 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) |
| 496 | { |
| 497 | struct thermal_hwmon_device *hwmon; |
| 498 | |
| 499 | mutex_lock(&thermal_list_lock); |
| 500 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) |
| 501 | if (!strcmp(hwmon->type, tz->type)) { |
| 502 | mutex_unlock(&thermal_list_lock); |
| 503 | return hwmon; |
| 504 | } |
| 505 | mutex_unlock(&thermal_list_lock); |
| 506 | |
| 507 | return NULL; |
| 508 | } |
| 509 | |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 510 | /* Find the temperature input matching a given thermal zone */ |
| 511 | static struct thermal_hwmon_temp * |
| 512 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, |
| 513 | const struct thermal_zone_device *tz) |
| 514 | { |
| 515 | struct thermal_hwmon_temp *temp; |
| 516 | |
| 517 | mutex_lock(&thermal_list_lock); |
| 518 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) |
| 519 | if (temp->tz == tz) { |
| 520 | mutex_unlock(&thermal_list_lock); |
| 521 | return temp; |
| 522 | } |
| 523 | mutex_unlock(&thermal_list_lock); |
| 524 | |
| 525 | return NULL; |
| 526 | } |
| 527 | |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 528 | static int |
| 529 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) |
| 530 | { |
| 531 | struct thermal_hwmon_device *hwmon; |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 532 | struct thermal_hwmon_temp *temp; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 533 | int new_hwmon_device = 1; |
| 534 | int result; |
| 535 | |
Jean Delvare | 0d97d7a | 2011-07-28 13:48:41 -0700 | [diff] [blame] | 536 | hwmon = thermal_hwmon_lookup_by_type(tz); |
| 537 | if (hwmon) { |
| 538 | new_hwmon_device = 0; |
| 539 | goto register_sys_interface; |
| 540 | } |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 541 | |
| 542 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
| 543 | if (!hwmon) |
| 544 | return -ENOMEM; |
| 545 | |
| 546 | INIT_LIST_HEAD(&hwmon->tz_list); |
| 547 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); |
| 548 | hwmon->device = hwmon_device_register(NULL); |
| 549 | if (IS_ERR(hwmon->device)) { |
| 550 | result = PTR_ERR(hwmon->device); |
| 551 | goto free_mem; |
| 552 | } |
Greg Kroah-Hartman | 0e968a3 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 553 | dev_set_drvdata(hwmon->device, hwmon); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 554 | result = device_create_file(hwmon->device, &dev_attr_name); |
| 555 | if (result) |
Durgadoss R | b299eb5 | 2011-03-03 04:30:13 +0530 | [diff] [blame] | 556 | goto free_mem; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 557 | |
| 558 | register_sys_interface: |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 559 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
| 560 | if (!temp) { |
| 561 | result = -ENOMEM; |
| 562 | goto unregister_name; |
| 563 | } |
| 564 | |
| 565 | temp->tz = tz; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 566 | hwmon->count++; |
| 567 | |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 568 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 569 | "temp%d_input", hwmon->count); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 570 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
| 571 | temp->temp_input.attr.attr.mode = 0444; |
| 572 | temp->temp_input.attr.show = temp_input_show; |
| 573 | sysfs_attr_init(&temp->temp_input.attr.attr); |
| 574 | result = device_create_file(hwmon->device, &temp->temp_input.attr); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 575 | if (result) |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 576 | goto free_temp_mem; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 577 | |
| 578 | if (tz->ops->get_crit_temp) { |
| 579 | unsigned long temperature; |
| 580 | if (!tz->ops->get_crit_temp(tz, &temperature)) { |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 581 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 582 | "temp%d_crit", hwmon->count); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 583 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
| 584 | temp->temp_crit.attr.attr.mode = 0444; |
| 585 | temp->temp_crit.attr.show = temp_crit_show; |
| 586 | sysfs_attr_init(&temp->temp_crit.attr.attr); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 587 | result = device_create_file(hwmon->device, |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 588 | &temp->temp_crit.attr); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 589 | if (result) |
Durgadoss R | b299eb5 | 2011-03-03 04:30:13 +0530 | [diff] [blame] | 590 | goto unregister_input; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 591 | } |
| 592 | } |
| 593 | |
| 594 | mutex_lock(&thermal_list_lock); |
| 595 | if (new_hwmon_device) |
| 596 | list_add_tail(&hwmon->node, &thermal_hwmon_list); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 597 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 598 | mutex_unlock(&thermal_list_lock); |
| 599 | |
| 600 | return 0; |
| 601 | |
Durgadoss R | b299eb5 | 2011-03-03 04:30:13 +0530 | [diff] [blame] | 602 | unregister_input: |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 603 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
| 604 | free_temp_mem: |
| 605 | kfree(temp); |
Durgadoss R | b299eb5 | 2011-03-03 04:30:13 +0530 | [diff] [blame] | 606 | unregister_name: |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 607 | if (new_hwmon_device) { |
| 608 | device_remove_file(hwmon->device, &dev_attr_name); |
| 609 | hwmon_device_unregister(hwmon->device); |
| 610 | } |
| 611 | free_mem: |
| 612 | if (new_hwmon_device) |
| 613 | kfree(hwmon); |
| 614 | |
| 615 | return result; |
| 616 | } |
| 617 | |
| 618 | static void |
| 619 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) |
| 620 | { |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 621 | struct thermal_hwmon_device *hwmon; |
| 622 | struct thermal_hwmon_temp *temp; |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 623 | |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 624 | hwmon = thermal_hwmon_lookup_by_type(tz); |
| 625 | if (unlikely(!hwmon)) { |
| 626 | /* Should never happen... */ |
| 627 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); |
| 628 | return; |
| 629 | } |
| 630 | |
| 631 | temp = thermal_hwmon_lookup_temp(hwmon, tz); |
| 632 | if (unlikely(!temp)) { |
| 633 | /* Should never happen... */ |
| 634 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); |
| 635 | return; |
| 636 | } |
| 637 | |
| 638 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
Durgadoss R | b299eb5 | 2011-03-03 04:30:13 +0530 | [diff] [blame] | 639 | if (tz->ops->get_crit_temp) |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 640 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 641 | |
| 642 | mutex_lock(&thermal_list_lock); |
Jean Delvare | 31f5396 | 2011-07-28 13:48:42 -0700 | [diff] [blame] | 643 | list_del(&temp->hwmon_node); |
| 644 | kfree(temp); |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 645 | if (!list_empty(&hwmon->tz_list)) { |
| 646 | mutex_unlock(&thermal_list_lock); |
| 647 | return; |
| 648 | } |
| 649 | list_del(&hwmon->node); |
| 650 | mutex_unlock(&thermal_list_lock); |
| 651 | |
| 652 | device_remove_file(hwmon->device, &dev_attr_name); |
| 653 | hwmon_device_unregister(hwmon->device); |
| 654 | kfree(hwmon); |
| 655 | } |
| 656 | #else |
| 657 | static int |
| 658 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) |
| 659 | { |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | static void |
| 664 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) |
| 665 | { |
| 666 | } |
| 667 | #endif |
| 668 | |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 669 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
| 670 | int delay) |
| 671 | { |
| 672 | cancel_delayed_work(&(tz->poll_queue)); |
| 673 | |
| 674 | if (!delay) |
| 675 | return; |
| 676 | |
| 677 | if (delay > 1000) |
Rafael J. Wysocki | 51e20d0 | 2011-11-06 14:21:38 +0100 | [diff] [blame] | 678 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 679 | round_jiffies(msecs_to_jiffies(delay))); |
| 680 | else |
Rafael J. Wysocki | 51e20d0 | 2011-11-06 14:21:38 +0100 | [diff] [blame] | 681 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 682 | msecs_to_jiffies(delay)); |
| 683 | } |
| 684 | |
| 685 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, |
| 686 | int temp, int trip_temp, int trip) |
| 687 | { |
| 688 | int trend = 0; |
| 689 | struct thermal_cooling_device_instance *instance; |
| 690 | struct thermal_cooling_device *cdev; |
| 691 | long state, max_state; |
| 692 | |
| 693 | /* |
| 694 | * Above Trip? |
| 695 | * ----------- |
| 696 | * Calculate the thermal trend (using the passive cooling equation) |
| 697 | * and modify the performance limit for all passive cooling devices |
| 698 | * accordingly. Note that we assume symmetry. |
| 699 | */ |
| 700 | if (temp >= trip_temp) { |
| 701 | tz->passive = true; |
| 702 | |
| 703 | trend = (tz->tc1 * (temp - tz->last_temperature)) + |
| 704 | (tz->tc2 * (temp - trip_temp)); |
| 705 | |
| 706 | /* Heating up? */ |
| 707 | if (trend > 0) { |
| 708 | list_for_each_entry(instance, &tz->cooling_devices, |
| 709 | node) { |
| 710 | if (instance->trip != trip) |
| 711 | continue; |
| 712 | cdev = instance->cdev; |
| 713 | cdev->ops->get_cur_state(cdev, &state); |
| 714 | cdev->ops->get_max_state(cdev, &max_state); |
| 715 | if (state++ < max_state) |
| 716 | cdev->ops->set_cur_state(cdev, state); |
| 717 | } |
| 718 | } else if (trend < 0) { /* Cooling off? */ |
| 719 | list_for_each_entry(instance, &tz->cooling_devices, |
| 720 | node) { |
| 721 | if (instance->trip != trip) |
| 722 | continue; |
| 723 | cdev = instance->cdev; |
| 724 | cdev->ops->get_cur_state(cdev, &state); |
| 725 | cdev->ops->get_max_state(cdev, &max_state); |
| 726 | if (state > 0) |
| 727 | cdev->ops->set_cur_state(cdev, --state); |
| 728 | } |
| 729 | } |
| 730 | return; |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Below Trip? |
| 735 | * ----------- |
| 736 | * Implement passive cooling hysteresis to slowly increase performance |
| 737 | * and avoid thrashing around the passive trip point. Note that we |
| 738 | * assume symmetry. |
| 739 | */ |
| 740 | list_for_each_entry(instance, &tz->cooling_devices, node) { |
| 741 | if (instance->trip != trip) |
| 742 | continue; |
| 743 | cdev = instance->cdev; |
| 744 | cdev->ops->get_cur_state(cdev, &state); |
| 745 | cdev->ops->get_max_state(cdev, &max_state); |
| 746 | if (state > 0) |
| 747 | cdev->ops->set_cur_state(cdev, --state); |
| 748 | if (state == 0) |
| 749 | tz->passive = false; |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | static void thermal_zone_device_check(struct work_struct *work) |
| 754 | { |
| 755 | struct thermal_zone_device *tz = container_of(work, struct |
| 756 | thermal_zone_device, |
| 757 | poll_queue.work); |
| 758 | thermal_zone_device_update(tz); |
| 759 | } |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 760 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 761 | /** |
| 762 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 763 | * @tz: thermal zone device |
| 764 | * @trip: indicates which trip point the cooling devices is |
| 765 | * associated with in this thermal zone. |
| 766 | * @cdev: thermal cooling device |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 767 | * |
| 768 | * This function is usually called in the thermal zone device .bind callback. |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 769 | */ |
| 770 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, |
| 771 | int trip, |
| 772 | struct thermal_cooling_device *cdev) |
| 773 | { |
| 774 | struct thermal_cooling_device_instance *dev; |
| 775 | struct thermal_cooling_device_instance *pos; |
Thomas Sujith | c751670 | 2008-02-15 00:58:50 -0500 | [diff] [blame] | 776 | struct thermal_zone_device *pos1; |
| 777 | struct thermal_cooling_device *pos2; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 778 | int result; |
| 779 | |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 780 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 781 | return -EINVAL; |
| 782 | |
Thomas Sujith | c751670 | 2008-02-15 00:58:50 -0500 | [diff] [blame] | 783 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
| 784 | if (pos1 == tz) |
| 785 | break; |
| 786 | } |
| 787 | list_for_each_entry(pos2, &thermal_cdev_list, node) { |
| 788 | if (pos2 == cdev) |
| 789 | break; |
| 790 | } |
| 791 | |
| 792 | if (tz != pos1 || cdev != pos2) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 793 | return -EINVAL; |
| 794 | |
| 795 | dev = |
| 796 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); |
| 797 | if (!dev) |
| 798 | return -ENOMEM; |
| 799 | dev->tz = tz; |
| 800 | dev->cdev = cdev; |
| 801 | dev->trip = trip; |
| 802 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
| 803 | if (result) |
| 804 | goto free_mem; |
| 805 | |
| 806 | sprintf(dev->name, "cdev%d", dev->id); |
| 807 | result = |
| 808 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); |
| 809 | if (result) |
| 810 | goto release_idr; |
| 811 | |
| 812 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); |
Sergey Senozhatsky | 975f8c5 | 2010-04-06 14:34:51 -0700 | [diff] [blame] | 813 | sysfs_attr_init(&dev->attr.attr); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 814 | dev->attr.attr.name = dev->attr_name; |
| 815 | dev->attr.attr.mode = 0444; |
| 816 | dev->attr.show = thermal_cooling_device_trip_point_show; |
| 817 | result = device_create_file(&tz->device, &dev->attr); |
| 818 | if (result) |
| 819 | goto remove_symbol_link; |
| 820 | |
| 821 | mutex_lock(&tz->lock); |
| 822 | list_for_each_entry(pos, &tz->cooling_devices, node) |
| 823 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
| 824 | result = -EEXIST; |
| 825 | break; |
| 826 | } |
| 827 | if (!result) |
| 828 | list_add_tail(&dev->node, &tz->cooling_devices); |
| 829 | mutex_unlock(&tz->lock); |
| 830 | |
| 831 | if (!result) |
| 832 | return 0; |
| 833 | |
| 834 | device_remove_file(&tz->device, &dev->attr); |
| 835 | remove_symbol_link: |
| 836 | sysfs_remove_link(&tz->device.kobj, dev->name); |
| 837 | release_idr: |
| 838 | release_idr(&tz->idr, &tz->lock, dev->id); |
| 839 | free_mem: |
| 840 | kfree(dev); |
| 841 | return result; |
| 842 | } |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 843 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 844 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); |
| 845 | |
| 846 | /** |
| 847 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 848 | * @tz: thermal zone device |
| 849 | * @trip: indicates which trip point the cooling devices is |
| 850 | * associated with in this thermal zone. |
| 851 | * @cdev: thermal cooling device |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 852 | * |
| 853 | * This function is usually called in the thermal zone device .unbind callback. |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 854 | */ |
| 855 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, |
| 856 | int trip, |
| 857 | struct thermal_cooling_device *cdev) |
| 858 | { |
| 859 | struct thermal_cooling_device_instance *pos, *next; |
| 860 | |
| 861 | mutex_lock(&tz->lock); |
| 862 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 863 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 864 | list_del(&pos->node); |
| 865 | mutex_unlock(&tz->lock); |
| 866 | goto unbind; |
| 867 | } |
| 868 | } |
| 869 | mutex_unlock(&tz->lock); |
| 870 | |
| 871 | return -ENODEV; |
| 872 | |
| 873 | unbind: |
| 874 | device_remove_file(&tz->device, &pos->attr); |
| 875 | sysfs_remove_link(&tz->device.kobj, pos->name); |
| 876 | release_idr(&tz->idr, &tz->lock, pos->id); |
| 877 | kfree(pos); |
| 878 | return 0; |
| 879 | } |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 880 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 881 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); |
| 882 | |
| 883 | static void thermal_release(struct device *dev) |
| 884 | { |
| 885 | struct thermal_zone_device *tz; |
| 886 | struct thermal_cooling_device *cdev; |
| 887 | |
Kay Sievers | 354655e | 2009-01-06 10:44:37 -0800 | [diff] [blame] | 888 | if (!strncmp(dev_name(dev), "thermal_zone", sizeof "thermal_zone" - 1)) { |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 889 | tz = to_thermal_zone(dev); |
| 890 | kfree(tz); |
| 891 | } else { |
| 892 | cdev = to_cooling_device(dev); |
| 893 | kfree(cdev); |
| 894 | } |
| 895 | } |
| 896 | |
| 897 | static struct class thermal_class = { |
| 898 | .name = "thermal", |
| 899 | .dev_release = thermal_release, |
| 900 | }; |
| 901 | |
| 902 | /** |
| 903 | * thermal_cooling_device_register - register a new thermal cooling device |
| 904 | * @type: the thermal cooling device type. |
| 905 | * @devdata: device private data. |
| 906 | * @ops: standard thermal cooling devices callbacks. |
| 907 | */ |
Alan Cox | 5b275ce | 2010-11-11 15:27:29 +0000 | [diff] [blame] | 908 | struct thermal_cooling_device *thermal_cooling_device_register( |
| 909 | char *type, void *devdata, const struct thermal_cooling_device_ops *ops) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 910 | { |
| 911 | struct thermal_cooling_device *cdev; |
| 912 | struct thermal_zone_device *pos; |
| 913 | int result; |
| 914 | |
| 915 | if (strlen(type) >= THERMAL_NAME_LENGTH) |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 916 | return ERR_PTR(-EINVAL); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 917 | |
| 918 | if (!ops || !ops->get_max_state || !ops->get_cur_state || |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 919 | !ops->set_cur_state) |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 920 | return ERR_PTR(-EINVAL); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 921 | |
| 922 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); |
| 923 | if (!cdev) |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 924 | return ERR_PTR(-ENOMEM); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 925 | |
| 926 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); |
| 927 | if (result) { |
| 928 | kfree(cdev); |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 929 | return ERR_PTR(result); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | strcpy(cdev->type, type); |
| 933 | cdev->ops = ops; |
| 934 | cdev->device.class = &thermal_class; |
| 935 | cdev->devdata = devdata; |
Kay Sievers | 354655e | 2009-01-06 10:44:37 -0800 | [diff] [blame] | 936 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 937 | result = device_register(&cdev->device); |
| 938 | if (result) { |
| 939 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
| 940 | kfree(cdev); |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 941 | return ERR_PTR(result); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 942 | } |
| 943 | |
| 944 | /* sys I/F */ |
| 945 | if (type) { |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 946 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 947 | if (result) |
| 948 | goto unregister; |
| 949 | } |
| 950 | |
| 951 | result = device_create_file(&cdev->device, &dev_attr_max_state); |
| 952 | if (result) |
| 953 | goto unregister; |
| 954 | |
| 955 | result = device_create_file(&cdev->device, &dev_attr_cur_state); |
| 956 | if (result) |
| 957 | goto unregister; |
| 958 | |
| 959 | mutex_lock(&thermal_list_lock); |
| 960 | list_add(&cdev->node, &thermal_cdev_list); |
| 961 | list_for_each_entry(pos, &thermal_tz_list, node) { |
| 962 | if (!pos->ops->bind) |
| 963 | continue; |
| 964 | result = pos->ops->bind(pos, cdev); |
| 965 | if (result) |
| 966 | break; |
| 967 | |
| 968 | } |
| 969 | mutex_unlock(&thermal_list_lock); |
| 970 | |
| 971 | if (!result) |
| 972 | return cdev; |
| 973 | |
| 974 | unregister: |
| 975 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
| 976 | device_unregister(&cdev->device); |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 977 | return ERR_PTR(result); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 978 | } |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 979 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 980 | EXPORT_SYMBOL(thermal_cooling_device_register); |
| 981 | |
| 982 | /** |
| 983 | * thermal_cooling_device_unregister - removes the registered thermal cooling device |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 984 | * @cdev: the thermal cooling device to remove. |
| 985 | * |
| 986 | * thermal_cooling_device_unregister() must be called when the device is no |
| 987 | * longer needed. |
| 988 | */ |
| 989 | void thermal_cooling_device_unregister(struct |
| 990 | thermal_cooling_device |
| 991 | *cdev) |
| 992 | { |
| 993 | struct thermal_zone_device *tz; |
| 994 | struct thermal_cooling_device *pos = NULL; |
| 995 | |
| 996 | if (!cdev) |
| 997 | return; |
| 998 | |
| 999 | mutex_lock(&thermal_list_lock); |
| 1000 | list_for_each_entry(pos, &thermal_cdev_list, node) |
| 1001 | if (pos == cdev) |
| 1002 | break; |
| 1003 | if (pos != cdev) { |
| 1004 | /* thermal cooling device not found */ |
| 1005 | mutex_unlock(&thermal_list_lock); |
| 1006 | return; |
| 1007 | } |
| 1008 | list_del(&cdev->node); |
| 1009 | list_for_each_entry(tz, &thermal_tz_list, node) { |
| 1010 | if (!tz->ops->unbind) |
| 1011 | continue; |
| 1012 | tz->ops->unbind(tz, cdev); |
| 1013 | } |
| 1014 | mutex_unlock(&thermal_list_lock); |
| 1015 | if (cdev->type[0]) |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 1016 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1017 | device_remove_file(&cdev->device, &dev_attr_max_state); |
| 1018 | device_remove_file(&cdev->device, &dev_attr_cur_state); |
| 1019 | |
| 1020 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
| 1021 | device_unregister(&cdev->device); |
| 1022 | return; |
| 1023 | } |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 1024 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1025 | EXPORT_SYMBOL(thermal_cooling_device_unregister); |
| 1026 | |
| 1027 | /** |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1028 | * thermal_zone_device_update - force an update of a thermal zone's state |
| 1029 | * @ttz: the thermal zone to update |
| 1030 | */ |
| 1031 | |
| 1032 | void thermal_zone_device_update(struct thermal_zone_device *tz) |
| 1033 | { |
| 1034 | int count, ret = 0; |
| 1035 | long temp, trip_temp; |
| 1036 | enum thermal_trip_type trip_type; |
| 1037 | struct thermal_cooling_device_instance *instance; |
| 1038 | struct thermal_cooling_device *cdev; |
| 1039 | |
| 1040 | mutex_lock(&tz->lock); |
| 1041 | |
Michael Brunner | 0d28816 | 2009-08-26 14:29:25 -0700 | [diff] [blame] | 1042 | if (tz->ops->get_temp(tz, &temp)) { |
| 1043 | /* get_temp failed - retry it later */ |
| 1044 | printk(KERN_WARNING PREFIX "failed to read out thermal zone " |
| 1045 | "%d\n", tz->id); |
| 1046 | goto leave; |
| 1047 | } |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1048 | |
| 1049 | for (count = 0; count < tz->trips; count++) { |
| 1050 | tz->ops->get_trip_type(tz, count, &trip_type); |
| 1051 | tz->ops->get_trip_temp(tz, count, &trip_temp); |
| 1052 | |
| 1053 | switch (trip_type) { |
| 1054 | case THERMAL_TRIP_CRITICAL: |
Vladimir Zajac | 2932135 | 2009-05-06 19:34:21 +0200 | [diff] [blame] | 1055 | if (temp >= trip_temp) { |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1056 | if (tz->ops->notify) |
| 1057 | ret = tz->ops->notify(tz, count, |
| 1058 | trip_type); |
| 1059 | if (!ret) { |
| 1060 | printk(KERN_EMERG |
| 1061 | "Critical temperature reached (%ld C), shutting down.\n", |
| 1062 | temp/1000); |
| 1063 | orderly_poweroff(true); |
| 1064 | } |
| 1065 | } |
| 1066 | break; |
| 1067 | case THERMAL_TRIP_HOT: |
Vladimir Zajac | 2932135 | 2009-05-06 19:34:21 +0200 | [diff] [blame] | 1068 | if (temp >= trip_temp) |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1069 | if (tz->ops->notify) |
| 1070 | tz->ops->notify(tz, count, trip_type); |
| 1071 | break; |
| 1072 | case THERMAL_TRIP_ACTIVE: |
| 1073 | list_for_each_entry(instance, &tz->cooling_devices, |
| 1074 | node) { |
| 1075 | if (instance->trip != count) |
| 1076 | continue; |
| 1077 | |
| 1078 | cdev = instance->cdev; |
| 1079 | |
Vladimir Zajac | 2932135 | 2009-05-06 19:34:21 +0200 | [diff] [blame] | 1080 | if (temp >= trip_temp) |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1081 | cdev->ops->set_cur_state(cdev, 1); |
| 1082 | else |
| 1083 | cdev->ops->set_cur_state(cdev, 0); |
| 1084 | } |
| 1085 | break; |
| 1086 | case THERMAL_TRIP_PASSIVE: |
Vladimir Zajac | 2932135 | 2009-05-06 19:34:21 +0200 | [diff] [blame] | 1087 | if (temp >= trip_temp || tz->passive) |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1088 | thermal_zone_device_passive(tz, temp, |
| 1089 | trip_temp, count); |
| 1090 | break; |
| 1091 | } |
| 1092 | } |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 1093 | |
| 1094 | if (tz->forced_passive) |
| 1095 | thermal_zone_device_passive(tz, temp, tz->forced_passive, |
| 1096 | THERMAL_TRIPS_NONE); |
| 1097 | |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1098 | tz->last_temperature = temp; |
Michael Brunner | 0d28816 | 2009-08-26 14:29:25 -0700 | [diff] [blame] | 1099 | |
| 1100 | leave: |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1101 | if (tz->passive) |
| 1102 | thermal_zone_device_set_polling(tz, tz->passive_delay); |
| 1103 | else if (tz->polling_delay) |
| 1104 | thermal_zone_device_set_polling(tz, tz->polling_delay); |
Frans Pop | 3767cb5 | 2009-10-26 08:39:04 +0100 | [diff] [blame] | 1105 | else |
| 1106 | thermal_zone_device_set_polling(tz, 0); |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1107 | mutex_unlock(&tz->lock); |
| 1108 | } |
| 1109 | EXPORT_SYMBOL(thermal_zone_device_update); |
| 1110 | |
| 1111 | /** |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1112 | * thermal_zone_device_register - register a new thermal zone device |
| 1113 | * @type: the thermal zone device type |
| 1114 | * @trips: the number of trip points the thermal zone support |
| 1115 | * @devdata: private device data |
| 1116 | * @ops: standard thermal zone device callbacks |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1117 | * @tc1: thermal coefficient 1 for passive calculations |
| 1118 | * @tc2: thermal coefficient 2 for passive calculations |
| 1119 | * @passive_delay: number of milliseconds to wait between polls when |
| 1120 | * performing passive cooling |
| 1121 | * @polling_delay: number of milliseconds to wait between polls when checking |
| 1122 | * whether trip points have been crossed (0 for interrupt |
| 1123 | * driven systems) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1124 | * |
| 1125 | * thermal_zone_device_unregister() must be called when the device is no |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1126 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
| 1127 | * section 11.1.5.1 of the ACPI specification 3.0. |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1128 | */ |
| 1129 | struct thermal_zone_device *thermal_zone_device_register(char *type, |
Alan Cox | 5b275ce | 2010-11-11 15:27:29 +0000 | [diff] [blame] | 1130 | int trips, void *devdata, |
| 1131 | const struct thermal_zone_device_ops *ops, |
| 1132 | int tc1, int tc2, int passive_delay, int polling_delay) |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1133 | { |
| 1134 | struct thermal_zone_device *tz; |
| 1135 | struct thermal_cooling_device *pos; |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 1136 | enum thermal_trip_type trip_type; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1137 | int result; |
| 1138 | int count; |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 1139 | int passive = 0; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1140 | |
| 1141 | if (strlen(type) >= THERMAL_NAME_LENGTH) |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 1142 | return ERR_PTR(-EINVAL); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1143 | |
| 1144 | if (trips > THERMAL_MAX_TRIPS || trips < 0) |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 1145 | return ERR_PTR(-EINVAL); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1146 | |
| 1147 | if (!ops || !ops->get_temp) |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 1148 | return ERR_PTR(-EINVAL); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1149 | |
| 1150 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
| 1151 | if (!tz) |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 1152 | return ERR_PTR(-ENOMEM); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1153 | |
| 1154 | INIT_LIST_HEAD(&tz->cooling_devices); |
| 1155 | idr_init(&tz->idr); |
| 1156 | mutex_init(&tz->lock); |
| 1157 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); |
| 1158 | if (result) { |
| 1159 | kfree(tz); |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 1160 | return ERR_PTR(result); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | strcpy(tz->type, type); |
| 1164 | tz->ops = ops; |
| 1165 | tz->device.class = &thermal_class; |
| 1166 | tz->devdata = devdata; |
| 1167 | tz->trips = trips; |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1168 | tz->tc1 = tc1; |
| 1169 | tz->tc2 = tc2; |
| 1170 | tz->passive_delay = passive_delay; |
| 1171 | tz->polling_delay = polling_delay; |
| 1172 | |
Kay Sievers | 354655e | 2009-01-06 10:44:37 -0800 | [diff] [blame] | 1173 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1174 | result = device_register(&tz->device); |
| 1175 | if (result) { |
| 1176 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
| 1177 | kfree(tz); |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 1178 | return ERR_PTR(result); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1179 | } |
| 1180 | |
| 1181 | /* sys I/F */ |
| 1182 | if (type) { |
| 1183 | result = device_create_file(&tz->device, &dev_attr_type); |
| 1184 | if (result) |
| 1185 | goto unregister; |
| 1186 | } |
| 1187 | |
| 1188 | result = device_create_file(&tz->device, &dev_attr_temp); |
| 1189 | if (result) |
| 1190 | goto unregister; |
| 1191 | |
| 1192 | if (ops->get_mode) { |
| 1193 | result = device_create_file(&tz->device, &dev_attr_mode); |
| 1194 | if (result) |
| 1195 | goto unregister; |
| 1196 | } |
| 1197 | |
| 1198 | for (count = 0; count < trips; count++) { |
| 1199 | TRIP_POINT_ATTR_ADD(&tz->device, count, result); |
| 1200 | if (result) |
| 1201 | goto unregister; |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 1202 | tz->ops->get_trip_type(tz, count, &trip_type); |
| 1203 | if (trip_type == THERMAL_TRIP_PASSIVE) |
| 1204 | passive = 1; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1205 | } |
| 1206 | |
Matthew Garrett | 03a971a | 2008-12-03 18:00:38 +0000 | [diff] [blame] | 1207 | if (!passive) |
| 1208 | result = device_create_file(&tz->device, |
| 1209 | &dev_attr_passive); |
| 1210 | |
| 1211 | if (result) |
| 1212 | goto unregister; |
| 1213 | |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 1214 | result = thermal_add_hwmon_sysfs(tz); |
| 1215 | if (result) |
| 1216 | goto unregister; |
| 1217 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1218 | mutex_lock(&thermal_list_lock); |
| 1219 | list_add_tail(&tz->node, &thermal_tz_list); |
| 1220 | if (ops->bind) |
| 1221 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 1222 | result = ops->bind(tz, pos); |
| 1223 | if (result) |
| 1224 | break; |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1225 | } |
| 1226 | mutex_unlock(&thermal_list_lock); |
| 1227 | |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1228 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
| 1229 | |
| 1230 | thermal_zone_device_update(tz); |
| 1231 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1232 | if (!result) |
| 1233 | return tz; |
| 1234 | |
| 1235 | unregister: |
| 1236 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
| 1237 | device_unregister(&tz->device); |
Thomas Sujith | 3e6fda5 | 2008-02-15 00:59:50 -0500 | [diff] [blame] | 1238 | return ERR_PTR(result); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1239 | } |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 1240 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1241 | EXPORT_SYMBOL(thermal_zone_device_register); |
| 1242 | |
| 1243 | /** |
| 1244 | * thermal_device_unregister - removes the registered thermal zone device |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1245 | * @tz: the thermal zone device to remove |
| 1246 | */ |
| 1247 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) |
| 1248 | { |
| 1249 | struct thermal_cooling_device *cdev; |
| 1250 | struct thermal_zone_device *pos = NULL; |
| 1251 | int count; |
| 1252 | |
| 1253 | if (!tz) |
| 1254 | return; |
| 1255 | |
| 1256 | mutex_lock(&thermal_list_lock); |
| 1257 | list_for_each_entry(pos, &thermal_tz_list, node) |
| 1258 | if (pos == tz) |
| 1259 | break; |
| 1260 | if (pos != tz) { |
| 1261 | /* thermal zone device not found */ |
| 1262 | mutex_unlock(&thermal_list_lock); |
| 1263 | return; |
| 1264 | } |
| 1265 | list_del(&tz->node); |
| 1266 | if (tz->ops->unbind) |
| 1267 | list_for_each_entry(cdev, &thermal_cdev_list, node) |
| 1268 | tz->ops->unbind(tz, cdev); |
| 1269 | mutex_unlock(&thermal_list_lock); |
| 1270 | |
Matthew Garrett | b1569e9 | 2008-12-03 17:55:32 +0000 | [diff] [blame] | 1271 | thermal_zone_device_set_polling(tz, 0); |
| 1272 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1273 | if (tz->type[0]) |
| 1274 | device_remove_file(&tz->device, &dev_attr_type); |
| 1275 | device_remove_file(&tz->device, &dev_attr_temp); |
| 1276 | if (tz->ops->get_mode) |
| 1277 | device_remove_file(&tz->device, &dev_attr_mode); |
| 1278 | |
| 1279 | for (count = 0; count < tz->trips; count++) |
| 1280 | TRIP_POINT_ATTR_REMOVE(&tz->device, count); |
| 1281 | |
Zhang Rui | e68b16a | 2008-04-21 16:07:52 +0800 | [diff] [blame] | 1282 | thermal_remove_hwmon_sysfs(tz); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1283 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
| 1284 | idr_destroy(&tz->idr); |
| 1285 | mutex_destroy(&tz->lock); |
| 1286 | device_unregister(&tz->device); |
| 1287 | return; |
| 1288 | } |
Len Brown | 543a956 | 2008-02-07 16:55:08 -0500 | [diff] [blame] | 1289 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1290 | EXPORT_SYMBOL(thermal_zone_device_unregister); |
| 1291 | |
Rafael J. Wysocki | af06216 | 2011-03-01 01:12:19 +0100 | [diff] [blame] | 1292 | #ifdef CONFIG_NET |
| 1293 | static struct genl_family thermal_event_genl_family = { |
| 1294 | .id = GENL_ID_GENERATE, |
| 1295 | .name = THERMAL_GENL_FAMILY_NAME, |
| 1296 | .version = THERMAL_GENL_VERSION, |
| 1297 | .maxattr = THERMAL_GENL_ATTR_MAX, |
| 1298 | }; |
| 1299 | |
| 1300 | static struct genl_multicast_group thermal_event_mcgrp = { |
| 1301 | .name = THERMAL_GENL_MCAST_GROUP_NAME, |
| 1302 | }; |
| 1303 | |
Jean Delvare | 2d58d7e | 2011-11-04 10:31:04 +0100 | [diff] [blame] | 1304 | int thermal_generate_netlink_event(u32 orig, enum events event) |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1305 | { |
| 1306 | struct sk_buff *skb; |
| 1307 | struct nlattr *attr; |
| 1308 | struct thermal_genl_event *thermal_event; |
| 1309 | void *msg_header; |
| 1310 | int size; |
| 1311 | int result; |
Fabio Estevam | b11de07 | 2012-03-21 12:55:00 -0700 | [diff] [blame] | 1312 | static unsigned int thermal_event_seqnum; |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1313 | |
| 1314 | /* allocate memory */ |
Joe Perches | 886ee54 | 2012-03-21 12:55:01 -0700 | [diff] [blame^] | 1315 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
| 1316 | nla_total_size(0); |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1317 | |
| 1318 | skb = genlmsg_new(size, GFP_ATOMIC); |
| 1319 | if (!skb) |
| 1320 | return -ENOMEM; |
| 1321 | |
| 1322 | /* add the genetlink message header */ |
| 1323 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, |
| 1324 | &thermal_event_genl_family, 0, |
| 1325 | THERMAL_GENL_CMD_EVENT); |
| 1326 | if (!msg_header) { |
| 1327 | nlmsg_free(skb); |
| 1328 | return -ENOMEM; |
| 1329 | } |
| 1330 | |
| 1331 | /* fill the data */ |
Joe Perches | 886ee54 | 2012-03-21 12:55:01 -0700 | [diff] [blame^] | 1332 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
| 1333 | sizeof(struct thermal_genl_event)); |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1334 | |
| 1335 | if (!attr) { |
| 1336 | nlmsg_free(skb); |
| 1337 | return -EINVAL; |
| 1338 | } |
| 1339 | |
| 1340 | thermal_event = nla_data(attr); |
| 1341 | if (!thermal_event) { |
| 1342 | nlmsg_free(skb); |
| 1343 | return -EINVAL; |
| 1344 | } |
| 1345 | |
| 1346 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); |
| 1347 | |
| 1348 | thermal_event->orig = orig; |
| 1349 | thermal_event->event = event; |
| 1350 | |
| 1351 | /* send multicast genetlink message */ |
| 1352 | result = genlmsg_end(skb, msg_header); |
| 1353 | if (result < 0) { |
| 1354 | nlmsg_free(skb); |
| 1355 | return result; |
| 1356 | } |
| 1357 | |
| 1358 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); |
| 1359 | if (result) |
| 1360 | printk(KERN_INFO "failed to send netlink event:%d", result); |
| 1361 | |
| 1362 | return result; |
| 1363 | } |
Jean Delvare | 2d58d7e | 2011-11-04 10:31:04 +0100 | [diff] [blame] | 1364 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1365 | |
| 1366 | static int genetlink_init(void) |
| 1367 | { |
| 1368 | int result; |
| 1369 | |
| 1370 | result = genl_register_family(&thermal_event_genl_family); |
| 1371 | if (result) |
| 1372 | return result; |
| 1373 | |
| 1374 | result = genl_register_mc_group(&thermal_event_genl_family, |
| 1375 | &thermal_event_mcgrp); |
| 1376 | if (result) |
| 1377 | genl_unregister_family(&thermal_event_genl_family); |
| 1378 | return result; |
| 1379 | } |
| 1380 | |
Rafael J. Wysocki | af06216 | 2011-03-01 01:12:19 +0100 | [diff] [blame] | 1381 | static void genetlink_exit(void) |
| 1382 | { |
| 1383 | genl_unregister_family(&thermal_event_genl_family); |
| 1384 | } |
| 1385 | #else /* !CONFIG_NET */ |
| 1386 | static inline int genetlink_init(void) { return 0; } |
| 1387 | static inline void genetlink_exit(void) {} |
| 1388 | #endif /* !CONFIG_NET */ |
| 1389 | |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1390 | static int __init thermal_init(void) |
| 1391 | { |
| 1392 | int result = 0; |
| 1393 | |
| 1394 | result = class_register(&thermal_class); |
| 1395 | if (result) { |
| 1396 | idr_destroy(&thermal_tz_idr); |
| 1397 | idr_destroy(&thermal_cdev_idr); |
| 1398 | mutex_destroy(&thermal_idr_lock); |
| 1399 | mutex_destroy(&thermal_list_lock); |
| 1400 | } |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1401 | result = genetlink_init(); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1402 | return result; |
| 1403 | } |
| 1404 | |
| 1405 | static void __exit thermal_exit(void) |
| 1406 | { |
| 1407 | class_unregister(&thermal_class); |
| 1408 | idr_destroy(&thermal_tz_idr); |
| 1409 | idr_destroy(&thermal_cdev_idr); |
| 1410 | mutex_destroy(&thermal_idr_lock); |
| 1411 | mutex_destroy(&thermal_list_lock); |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1412 | genetlink_exit(); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1413 | } |
| 1414 | |
R.Durgadoss | 4cb1872 | 2010-10-27 03:33:29 +0530 | [diff] [blame] | 1415 | fs_initcall(thermal_init); |
Zhang Rui | 203d3d4 | 2008-01-17 15:51:08 +0800 | [diff] [blame] | 1416 | module_exit(thermal_exit); |