Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 1 | /* |
| 2 | * adt7x10.c - Part of lm_sensors, Linux kernel modules for hardware |
| 3 | * monitoring |
| 4 | * This driver handles the ADT7410 and compatible digital temperature sensors. |
| 5 | * Hartmut Knaack <knaack.h@gmx.de> 2012-07-22 |
| 6 | * based on lm75.c by Frodo Looijaard <frodol@dds.nl> |
| 7 | * and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | */ |
| 23 | |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/jiffies.h> |
| 28 | #include <linux/hwmon.h> |
| 29 | #include <linux/hwmon-sysfs.h> |
| 30 | #include <linux/err.h> |
| 31 | #include <linux/mutex.h> |
| 32 | #include <linux/delay.h> |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 33 | #include <linux/interrupt.h> |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 34 | |
| 35 | #include "adt7x10.h" |
| 36 | |
| 37 | /* |
| 38 | * ADT7X10 status |
| 39 | */ |
| 40 | #define ADT7X10_STAT_T_LOW (1 << 4) |
| 41 | #define ADT7X10_STAT_T_HIGH (1 << 5) |
| 42 | #define ADT7X10_STAT_T_CRIT (1 << 6) |
| 43 | #define ADT7X10_STAT_NOT_RDY (1 << 7) |
| 44 | |
| 45 | /* |
| 46 | * ADT7X10 config |
| 47 | */ |
| 48 | #define ADT7X10_FAULT_QUEUE_MASK (1 << 0 | 1 << 1) |
| 49 | #define ADT7X10_CT_POLARITY (1 << 2) |
| 50 | #define ADT7X10_INT_POLARITY (1 << 3) |
| 51 | #define ADT7X10_EVENT_MODE (1 << 4) |
| 52 | #define ADT7X10_MODE_MASK (1 << 5 | 1 << 6) |
| 53 | #define ADT7X10_FULL (0 << 5 | 0 << 6) |
| 54 | #define ADT7X10_PD (1 << 5 | 1 << 6) |
| 55 | #define ADT7X10_RESOLUTION (1 << 7) |
| 56 | |
| 57 | /* |
| 58 | * ADT7X10 masks |
| 59 | */ |
| 60 | #define ADT7X10_T13_VALUE_MASK 0xFFF8 |
| 61 | #define ADT7X10_T_HYST_MASK 0xF |
| 62 | |
| 63 | /* straight from the datasheet */ |
| 64 | #define ADT7X10_TEMP_MIN (-55000) |
| 65 | #define ADT7X10_TEMP_MAX 150000 |
| 66 | |
| 67 | /* Each client has this additional data */ |
| 68 | struct adt7x10_data { |
| 69 | const struct adt7x10_ops *ops; |
| 70 | const char *name; |
| 71 | struct device *hwmon_dev; |
| 72 | struct mutex update_lock; |
| 73 | u8 config; |
| 74 | u8 oldconfig; |
| 75 | bool valid; /* true if registers valid */ |
| 76 | unsigned long last_updated; /* In jiffies */ |
| 77 | s16 temp[4]; /* Register values, |
| 78 | 0 = input |
| 79 | 1 = high |
| 80 | 2 = low |
| 81 | 3 = critical */ |
| 82 | u8 hyst; /* hysteresis offset */ |
| 83 | }; |
| 84 | |
| 85 | static int adt7x10_read_byte(struct device *dev, u8 reg) |
| 86 | { |
| 87 | struct adt7x10_data *d = dev_get_drvdata(dev); |
| 88 | return d->ops->read_byte(dev, reg); |
| 89 | } |
| 90 | |
| 91 | static int adt7x10_write_byte(struct device *dev, u8 reg, u8 data) |
| 92 | { |
| 93 | struct adt7x10_data *d = dev_get_drvdata(dev); |
| 94 | return d->ops->write_byte(dev, reg, data); |
| 95 | } |
| 96 | |
| 97 | static int adt7x10_read_word(struct device *dev, u8 reg) |
| 98 | { |
| 99 | struct adt7x10_data *d = dev_get_drvdata(dev); |
| 100 | return d->ops->read_word(dev, reg); |
| 101 | } |
| 102 | |
| 103 | static int adt7x10_write_word(struct device *dev, u8 reg, u16 data) |
| 104 | { |
| 105 | struct adt7x10_data *d = dev_get_drvdata(dev); |
| 106 | return d->ops->write_word(dev, reg, data); |
| 107 | } |
| 108 | |
| 109 | static const u8 ADT7X10_REG_TEMP[4] = { |
| 110 | ADT7X10_TEMPERATURE, /* input */ |
| 111 | ADT7X10_T_ALARM_HIGH, /* high */ |
| 112 | ADT7X10_T_ALARM_LOW, /* low */ |
| 113 | ADT7X10_T_CRIT, /* critical */ |
| 114 | }; |
| 115 | |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 116 | static irqreturn_t adt7x10_irq_handler(int irq, void *private) |
| 117 | { |
| 118 | struct device *dev = private; |
| 119 | int status; |
| 120 | |
| 121 | status = adt7x10_read_byte(dev, ADT7X10_STATUS); |
| 122 | if (status < 0) |
| 123 | return IRQ_HANDLED; |
| 124 | |
| 125 | if (status & ADT7X10_STAT_T_HIGH) |
| 126 | sysfs_notify(&dev->kobj, NULL, "temp1_max_alarm"); |
| 127 | if (status & ADT7X10_STAT_T_LOW) |
| 128 | sysfs_notify(&dev->kobj, NULL, "temp1_min_alarm"); |
| 129 | if (status & ADT7X10_STAT_T_CRIT) |
| 130 | sysfs_notify(&dev->kobj, NULL, "temp1_crit_alarm"); |
| 131 | |
| 132 | return IRQ_HANDLED; |
| 133 | } |
| 134 | |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 135 | static int adt7x10_temp_ready(struct device *dev) |
| 136 | { |
| 137 | int i, status; |
| 138 | |
| 139 | for (i = 0; i < 6; i++) { |
| 140 | status = adt7x10_read_byte(dev, ADT7X10_STATUS); |
| 141 | if (status < 0) |
| 142 | return status; |
| 143 | if (!(status & ADT7X10_STAT_NOT_RDY)) |
| 144 | return 0; |
| 145 | msleep(60); |
| 146 | } |
| 147 | return -ETIMEDOUT; |
| 148 | } |
| 149 | |
| 150 | static int adt7x10_update_temp(struct device *dev) |
| 151 | { |
| 152 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 153 | int ret = 0; |
| 154 | |
| 155 | mutex_lock(&data->update_lock); |
| 156 | |
| 157 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| 158 | || !data->valid) { |
| 159 | int temp; |
| 160 | |
| 161 | dev_dbg(dev, "Starting update\n"); |
| 162 | |
| 163 | ret = adt7x10_temp_ready(dev); /* check for new value */ |
| 164 | if (ret) |
| 165 | goto abort; |
| 166 | |
| 167 | temp = adt7x10_read_word(dev, ADT7X10_REG_TEMP[0]); |
| 168 | if (temp < 0) { |
| 169 | ret = temp; |
| 170 | dev_dbg(dev, "Failed to read value: reg %d, error %d\n", |
| 171 | ADT7X10_REG_TEMP[0], ret); |
| 172 | goto abort; |
| 173 | } |
| 174 | data->temp[0] = temp; |
| 175 | data->last_updated = jiffies; |
| 176 | data->valid = true; |
| 177 | } |
| 178 | |
| 179 | abort: |
| 180 | mutex_unlock(&data->update_lock); |
| 181 | return ret; |
| 182 | } |
| 183 | |
| 184 | static int adt7x10_fill_cache(struct device *dev) |
| 185 | { |
| 186 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 187 | int ret; |
| 188 | int i; |
| 189 | |
| 190 | for (i = 1; i < ARRAY_SIZE(data->temp); i++) { |
| 191 | ret = adt7x10_read_word(dev, ADT7X10_REG_TEMP[i]); |
| 192 | if (ret < 0) { |
| 193 | dev_dbg(dev, "Failed to read value: reg %d, error %d\n", |
| 194 | ADT7X10_REG_TEMP[i], ret); |
| 195 | return ret; |
| 196 | } |
| 197 | data->temp[i] = ret; |
| 198 | } |
| 199 | |
| 200 | ret = adt7x10_read_byte(dev, ADT7X10_T_HYST); |
| 201 | if (ret < 0) { |
| 202 | dev_dbg(dev, "Failed to read value: reg %d, error %d\n", |
| 203 | ADT7X10_T_HYST, ret); |
| 204 | return ret; |
| 205 | } |
| 206 | data->hyst = ret; |
| 207 | |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | static s16 ADT7X10_TEMP_TO_REG(long temp) |
| 212 | { |
| 213 | return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7X10_TEMP_MIN, |
| 214 | ADT7X10_TEMP_MAX) * 128, 1000); |
| 215 | } |
| 216 | |
| 217 | static int ADT7X10_REG_TO_TEMP(struct adt7x10_data *data, s16 reg) |
| 218 | { |
| 219 | /* in 13 bit mode, bits 0-2 are status flags - mask them out */ |
| 220 | if (!(data->config & ADT7X10_RESOLUTION)) |
| 221 | reg &= ADT7X10_T13_VALUE_MASK; |
| 222 | /* |
| 223 | * temperature is stored in twos complement format, in steps of |
| 224 | * 1/128°C |
| 225 | */ |
| 226 | return DIV_ROUND_CLOSEST(reg * 1000, 128); |
| 227 | } |
| 228 | |
| 229 | /*-----------------------------------------------------------------------*/ |
| 230 | |
| 231 | /* sysfs attributes for hwmon */ |
| 232 | |
| 233 | static ssize_t adt7x10_show_temp(struct device *dev, |
| 234 | struct device_attribute *da, |
| 235 | char *buf) |
| 236 | { |
| 237 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 238 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 239 | |
| 240 | |
| 241 | if (attr->index == 0) { |
| 242 | int ret; |
| 243 | |
| 244 | ret = adt7x10_update_temp(dev); |
| 245 | if (ret) |
| 246 | return ret; |
| 247 | } |
| 248 | |
| 249 | return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data, |
| 250 | data->temp[attr->index])); |
| 251 | } |
| 252 | |
| 253 | static ssize_t adt7x10_set_temp(struct device *dev, |
| 254 | struct device_attribute *da, |
| 255 | const char *buf, size_t count) |
| 256 | { |
| 257 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 258 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 259 | int nr = attr->index; |
| 260 | long temp; |
| 261 | int ret; |
| 262 | |
| 263 | ret = kstrtol(buf, 10, &temp); |
| 264 | if (ret) |
| 265 | return ret; |
| 266 | |
| 267 | mutex_lock(&data->update_lock); |
| 268 | data->temp[nr] = ADT7X10_TEMP_TO_REG(temp); |
| 269 | ret = adt7x10_write_word(dev, ADT7X10_REG_TEMP[nr], data->temp[nr]); |
| 270 | if (ret) |
| 271 | count = ret; |
| 272 | mutex_unlock(&data->update_lock); |
| 273 | return count; |
| 274 | } |
| 275 | |
| 276 | static ssize_t adt7x10_show_t_hyst(struct device *dev, |
| 277 | struct device_attribute *da, |
| 278 | char *buf) |
| 279 | { |
| 280 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 281 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 282 | int nr = attr->index; |
| 283 | int hyst; |
| 284 | |
| 285 | hyst = (data->hyst & ADT7X10_T_HYST_MASK) * 1000; |
| 286 | |
| 287 | /* |
| 288 | * hysteresis is stored as a 4 bit offset in the device, convert it |
| 289 | * to an absolute value |
| 290 | */ |
| 291 | if (nr == 2) /* min has positive offset, others have negative */ |
| 292 | hyst = -hyst; |
| 293 | return sprintf(buf, "%d\n", |
| 294 | ADT7X10_REG_TO_TEMP(data, data->temp[nr]) - hyst); |
| 295 | } |
| 296 | |
| 297 | static ssize_t adt7x10_set_t_hyst(struct device *dev, |
| 298 | struct device_attribute *da, |
| 299 | const char *buf, size_t count) |
| 300 | { |
| 301 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 302 | int limit, ret; |
| 303 | long hyst; |
| 304 | |
| 305 | ret = kstrtol(buf, 10, &hyst); |
| 306 | if (ret) |
| 307 | return ret; |
| 308 | /* convert absolute hysteresis value to a 4 bit delta value */ |
| 309 | limit = ADT7X10_REG_TO_TEMP(data, data->temp[1]); |
| 310 | hyst = clamp_val(hyst, ADT7X10_TEMP_MIN, ADT7X10_TEMP_MAX); |
| 311 | data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), |
| 312 | 0, ADT7X10_T_HYST_MASK); |
| 313 | ret = adt7x10_write_byte(dev, ADT7X10_T_HYST, data->hyst); |
| 314 | if (ret) |
| 315 | return ret; |
| 316 | |
| 317 | return count; |
| 318 | } |
| 319 | |
| 320 | static ssize_t adt7x10_show_alarm(struct device *dev, |
| 321 | struct device_attribute *da, |
| 322 | char *buf) |
| 323 | { |
| 324 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 325 | int ret; |
| 326 | |
| 327 | ret = adt7x10_read_byte(dev, ADT7X10_STATUS); |
| 328 | if (ret < 0) |
| 329 | return ret; |
| 330 | |
| 331 | return sprintf(buf, "%d\n", !!(ret & attr->index)); |
| 332 | } |
| 333 | |
| 334 | static ssize_t adt7x10_show_name(struct device *dev, |
| 335 | struct device_attribute *da, |
| 336 | char *buf) |
| 337 | { |
| 338 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 339 | |
| 340 | return sprintf(buf, "%s\n", data->name); |
| 341 | } |
| 342 | |
| 343 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, adt7x10_show_temp, NULL, 0); |
| 344 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
| 345 | adt7x10_show_temp, adt7x10_set_temp, 1); |
| 346 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, |
| 347 | adt7x10_show_temp, adt7x10_set_temp, 2); |
| 348 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, |
| 349 | adt7x10_show_temp, adt7x10_set_temp, 3); |
| 350 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, |
| 351 | adt7x10_show_t_hyst, adt7x10_set_t_hyst, 1); |
| 352 | static SENSOR_DEVICE_ATTR(temp1_min_hyst, S_IRUGO, |
| 353 | adt7x10_show_t_hyst, NULL, 2); |
| 354 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, |
| 355 | adt7x10_show_t_hyst, NULL, 3); |
| 356 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, adt7x10_show_alarm, |
| 357 | NULL, ADT7X10_STAT_T_LOW); |
| 358 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, adt7x10_show_alarm, |
| 359 | NULL, ADT7X10_STAT_T_HIGH); |
| 360 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, adt7x10_show_alarm, |
| 361 | NULL, ADT7X10_STAT_T_CRIT); |
| 362 | static DEVICE_ATTR(name, S_IRUGO, adt7x10_show_name, NULL); |
| 363 | |
| 364 | static struct attribute *adt7x10_attributes[] = { |
| 365 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 366 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
| 367 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
| 368 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
| 369 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
| 370 | &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, |
| 371 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, |
| 372 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, |
| 373 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
| 374 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
| 375 | NULL |
| 376 | }; |
| 377 | |
| 378 | static const struct attribute_group adt7x10_group = { |
| 379 | .attrs = adt7x10_attributes, |
| 380 | }; |
| 381 | |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 382 | int adt7x10_probe(struct device *dev, const char *name, int irq, |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 383 | const struct adt7x10_ops *ops) |
| 384 | { |
| 385 | struct adt7x10_data *data; |
| 386 | int ret; |
| 387 | |
| 388 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
| 389 | if (!data) |
| 390 | return -ENOMEM; |
| 391 | |
| 392 | data->ops = ops; |
| 393 | data->name = name; |
| 394 | |
| 395 | dev_set_drvdata(dev, data); |
| 396 | mutex_init(&data->update_lock); |
| 397 | |
| 398 | /* configure as specified */ |
| 399 | ret = adt7x10_read_byte(dev, ADT7X10_CONFIG); |
| 400 | if (ret < 0) { |
| 401 | dev_dbg(dev, "Can't read config? %d\n", ret); |
| 402 | return ret; |
| 403 | } |
| 404 | data->oldconfig = ret; |
| 405 | |
| 406 | /* |
| 407 | * Set to 16 bit resolution, continous conversion and comparator mode. |
| 408 | */ |
| 409 | data->config = data->oldconfig; |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 410 | data->config &= ~(ADT7X10_MODE_MASK | ADT7X10_CT_POLARITY | |
| 411 | ADT7X10_INT_POLARITY); |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 412 | data->config |= ADT7X10_FULL | ADT7X10_RESOLUTION | ADT7X10_EVENT_MODE; |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 413 | |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 414 | if (data->config != data->oldconfig) { |
| 415 | ret = adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config); |
| 416 | if (ret) |
| 417 | return ret; |
| 418 | } |
| 419 | dev_dbg(dev, "Config %02x\n", data->config); |
| 420 | |
| 421 | ret = adt7x10_fill_cache(dev); |
| 422 | if (ret) |
| 423 | goto exit_restore; |
| 424 | |
| 425 | /* Register sysfs hooks */ |
| 426 | ret = sysfs_create_group(&dev->kobj, &adt7x10_group); |
| 427 | if (ret) |
| 428 | goto exit_restore; |
| 429 | |
| 430 | /* |
| 431 | * The I2C device will already have it's own 'name' attribute, but for |
| 432 | * the SPI device we need to register it. name will only be non NULL if |
| 433 | * the device doesn't register the 'name' attribute on its own. |
| 434 | */ |
| 435 | if (name) { |
| 436 | ret = device_create_file(dev, &dev_attr_name); |
| 437 | if (ret) |
| 438 | goto exit_remove; |
| 439 | } |
| 440 | |
| 441 | data->hwmon_dev = hwmon_device_register(dev); |
| 442 | if (IS_ERR(data->hwmon_dev)) { |
| 443 | ret = PTR_ERR(data->hwmon_dev); |
| 444 | goto exit_remove_name; |
| 445 | } |
| 446 | |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 447 | if (irq > 0) { |
| 448 | ret = request_threaded_irq(irq, NULL, adt7x10_irq_handler, |
| 449 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 450 | dev_name(dev), dev); |
| 451 | if (ret) |
| 452 | goto exit_hwmon_device_unregister; |
| 453 | } |
| 454 | |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 455 | return 0; |
| 456 | |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 457 | exit_hwmon_device_unregister: |
| 458 | hwmon_device_unregister(data->hwmon_dev); |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 459 | exit_remove_name: |
| 460 | if (name) |
| 461 | device_remove_file(dev, &dev_attr_name); |
| 462 | exit_remove: |
| 463 | sysfs_remove_group(&dev->kobj, &adt7x10_group); |
| 464 | exit_restore: |
| 465 | adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig); |
| 466 | return ret; |
| 467 | } |
| 468 | EXPORT_SYMBOL_GPL(adt7x10_probe); |
| 469 | |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 470 | int adt7x10_remove(struct device *dev, int irq) |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 471 | { |
| 472 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 473 | |
Lars-Peter Clausen | 4b5e536 | 2013-03-12 11:38:47 +0100 | [diff] [blame^] | 474 | if (irq > 0) |
| 475 | free_irq(irq, dev); |
| 476 | |
Lars-Peter Clausen | 51c2a48 | 2013-03-12 11:38:46 +0100 | [diff] [blame] | 477 | hwmon_device_unregister(data->hwmon_dev); |
| 478 | if (data->name) |
| 479 | device_remove_file(dev, &dev_attr_name); |
| 480 | sysfs_remove_group(&dev->kobj, &adt7x10_group); |
| 481 | if (data->oldconfig != data->config) |
| 482 | adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig); |
| 483 | return 0; |
| 484 | } |
| 485 | EXPORT_SYMBOL_GPL(adt7x10_remove); |
| 486 | |
| 487 | #ifdef CONFIG_PM_SLEEP |
| 488 | |
| 489 | static int adt7x10_suspend(struct device *dev) |
| 490 | { |
| 491 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 492 | |
| 493 | return adt7x10_write_byte(dev, ADT7X10_CONFIG, |
| 494 | data->config | ADT7X10_PD); |
| 495 | } |
| 496 | |
| 497 | static int adt7x10_resume(struct device *dev) |
| 498 | { |
| 499 | struct adt7x10_data *data = dev_get_drvdata(dev); |
| 500 | |
| 501 | return adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config); |
| 502 | } |
| 503 | |
| 504 | SIMPLE_DEV_PM_OPS(adt7x10_dev_pm_ops, adt7x10_suspend, adt7x10_resume); |
| 505 | EXPORT_SYMBOL_GPL(adt7x10_dev_pm_ops); |
| 506 | |
| 507 | #endif /* CONFIG_PM_SLEEP */ |
| 508 | |
| 509 | MODULE_AUTHOR("Hartmut Knaack"); |
| 510 | MODULE_DESCRIPTION("ADT7410/ADT7420, ADT7310/ADT7320 common code"); |
| 511 | MODULE_LICENSE("GPL"); |