Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 1 | /* |
| 2 | * adt7410.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/i2c.h> |
| 29 | #include <linux/hwmon.h> |
| 30 | #include <linux/hwmon-sysfs.h> |
| 31 | #include <linux/err.h> |
| 32 | #include <linux/mutex.h> |
| 33 | #include <linux/delay.h> |
| 34 | |
| 35 | /* |
| 36 | * ADT7410 registers definition |
| 37 | */ |
| 38 | |
| 39 | #define ADT7410_TEMPERATURE 0 |
| 40 | #define ADT7410_STATUS 2 |
| 41 | #define ADT7410_CONFIG 3 |
| 42 | #define ADT7410_T_ALARM_HIGH 4 |
| 43 | #define ADT7410_T_ALARM_LOW 6 |
| 44 | #define ADT7410_T_CRIT 8 |
| 45 | #define ADT7410_T_HYST 0xA |
| 46 | |
| 47 | /* |
| 48 | * ADT7410 status |
| 49 | */ |
| 50 | #define ADT7410_STAT_T_LOW (1 << 4) |
| 51 | #define ADT7410_STAT_T_HIGH (1 << 5) |
| 52 | #define ADT7410_STAT_T_CRIT (1 << 6) |
| 53 | #define ADT7410_STAT_NOT_RDY (1 << 7) |
| 54 | |
| 55 | /* |
| 56 | * ADT7410 config |
| 57 | */ |
| 58 | #define ADT7410_FAULT_QUEUE_MASK (1 << 0 | 1 << 1) |
| 59 | #define ADT7410_CT_POLARITY (1 << 2) |
| 60 | #define ADT7410_INT_POLARITY (1 << 3) |
| 61 | #define ADT7410_EVENT_MODE (1 << 4) |
| 62 | #define ADT7410_MODE_MASK (1 << 5 | 1 << 6) |
| 63 | #define ADT7410_FULL (0 << 5 | 0 << 6) |
| 64 | #define ADT7410_PD (1 << 5 | 1 << 6) |
| 65 | #define ADT7410_RESOLUTION (1 << 7) |
| 66 | |
| 67 | /* |
| 68 | * ADT7410 masks |
| 69 | */ |
| 70 | #define ADT7410_T13_VALUE_MASK 0xFFF8 |
| 71 | #define ADT7410_T_HYST_MASK 0xF |
| 72 | |
| 73 | /* straight from the datasheet */ |
| 74 | #define ADT7410_TEMP_MIN (-55000) |
| 75 | #define ADT7410_TEMP_MAX 150000 |
| 76 | |
| 77 | enum adt7410_type { /* keep sorted in alphabetical order */ |
| 78 | adt7410, |
| 79 | }; |
| 80 | |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 81 | static const u8 ADT7410_REG_TEMP[4] = { |
| 82 | ADT7410_TEMPERATURE, /* input */ |
| 83 | ADT7410_T_ALARM_HIGH, /* high */ |
| 84 | ADT7410_T_ALARM_LOW, /* low */ |
| 85 | ADT7410_T_CRIT, /* critical */ |
| 86 | }; |
| 87 | |
| 88 | /* Each client has this additional data */ |
| 89 | struct adt7410_data { |
| 90 | struct device *hwmon_dev; |
| 91 | struct mutex update_lock; |
| 92 | u8 config; |
| 93 | u8 oldconfig; |
| 94 | bool valid; /* true if registers valid */ |
| 95 | unsigned long last_updated; /* In jiffies */ |
| 96 | s16 temp[4]; /* Register values, |
| 97 | 0 = input |
| 98 | 1 = high |
| 99 | 2 = low |
| 100 | 3 = critical */ |
| 101 | u8 hyst; /* hysteresis offset */ |
| 102 | }; |
| 103 | |
| 104 | /* |
| 105 | * adt7410 register access by I2C |
| 106 | */ |
| 107 | static int adt7410_temp_ready(struct i2c_client *client) |
| 108 | { |
| 109 | int i, status; |
| 110 | |
| 111 | for (i = 0; i < 6; i++) { |
| 112 | status = i2c_smbus_read_byte_data(client, ADT7410_STATUS); |
| 113 | if (status < 0) |
| 114 | return status; |
| 115 | if (!(status & ADT7410_STAT_NOT_RDY)) |
| 116 | return 0; |
| 117 | msleep(60); |
| 118 | } |
| 119 | return -ETIMEDOUT; |
| 120 | } |
| 121 | |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 122 | static int adt7410_update_temp(struct device *dev) |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 123 | { |
| 124 | struct i2c_client *client = to_i2c_client(dev); |
| 125 | struct adt7410_data *data = i2c_get_clientdata(client); |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 126 | int ret = 0; |
| 127 | |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 128 | mutex_lock(&data->update_lock); |
| 129 | |
| 130 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| 131 | || !data->valid) { |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 132 | int temp; |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 133 | |
| 134 | dev_dbg(&client->dev, "Starting update\n"); |
| 135 | |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 136 | ret = adt7410_temp_ready(client); /* check for new value */ |
| 137 | if (ret) |
| 138 | goto abort; |
| 139 | |
| 140 | temp = i2c_smbus_read_word_swapped(client, ADT7410_REG_TEMP[0]); |
| 141 | if (temp < 0) { |
| 142 | ret = temp; |
| 143 | dev_dbg(dev, "Failed to read value: reg %d, error %d\n", |
| 144 | ADT7410_REG_TEMP[0], ret); |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 145 | goto abort; |
| 146 | } |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 147 | data->temp[0] = temp; |
| 148 | |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 149 | data->last_updated = jiffies; |
| 150 | data->valid = true; |
| 151 | } |
| 152 | |
| 153 | abort: |
| 154 | mutex_unlock(&data->update_lock); |
| 155 | return ret; |
| 156 | } |
| 157 | |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 158 | static int adt7410_fill_cache(struct i2c_client *client) |
| 159 | { |
| 160 | struct adt7410_data *data = i2c_get_clientdata(client); |
| 161 | int ret; |
| 162 | int i; |
| 163 | |
| 164 | for (i = 1; i < ARRAY_SIZE(ADT7410_REG_TEMP); i++) { |
| 165 | ret = i2c_smbus_read_word_swapped(client, ADT7410_REG_TEMP[i]); |
| 166 | if (ret < 0) { |
| 167 | dev_dbg(&client->dev, |
| 168 | "Failed to read value: reg %d, error %d\n", |
| 169 | ADT7410_REG_TEMP[i], ret); |
| 170 | return ret; |
| 171 | } |
| 172 | data->temp[i] = ret; |
| 173 | } |
| 174 | |
| 175 | ret = i2c_smbus_read_byte_data(client, ADT7410_T_HYST); |
| 176 | if (ret < 0) { |
| 177 | dev_dbg(&client->dev, |
| 178 | "Failed to read value: hyst reg, error %d\n", |
| 179 | ret); |
| 180 | return ret; |
| 181 | } |
| 182 | data->hyst = ret; |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 187 | static s16 ADT7410_TEMP_TO_REG(long temp) |
| 188 | { |
Guenter Roeck | 2a844c1 | 2013-01-09 08:09:34 -0800 | [diff] [blame] | 189 | return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7410_TEMP_MIN, |
| 190 | ADT7410_TEMP_MAX) * 128, 1000); |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | static int ADT7410_REG_TO_TEMP(struct adt7410_data *data, s16 reg) |
| 194 | { |
| 195 | /* in 13 bit mode, bits 0-2 are status flags - mask them out */ |
| 196 | if (!(data->config & ADT7410_RESOLUTION)) |
| 197 | reg &= ADT7410_T13_VALUE_MASK; |
| 198 | /* |
| 199 | * temperature is stored in twos complement format, in steps of |
| 200 | * 1/128°C |
| 201 | */ |
| 202 | return DIV_ROUND_CLOSEST(reg * 1000, 128); |
| 203 | } |
| 204 | |
| 205 | /*-----------------------------------------------------------------------*/ |
| 206 | |
| 207 | /* sysfs attributes for hwmon */ |
| 208 | |
| 209 | static ssize_t adt7410_show_temp(struct device *dev, |
| 210 | struct device_attribute *da, char *buf) |
| 211 | { |
| 212 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 213 | struct i2c_client *client = to_i2c_client(dev); |
| 214 | struct adt7410_data *data = i2c_get_clientdata(client); |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 215 | |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 216 | if (attr->index == 0) { |
| 217 | int ret; |
| 218 | |
| 219 | ret = adt7410_update_temp(dev); |
| 220 | if (ret) |
| 221 | return ret; |
| 222 | } |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 223 | |
| 224 | return sprintf(buf, "%d\n", ADT7410_REG_TO_TEMP(data, |
| 225 | data->temp[attr->index])); |
| 226 | } |
| 227 | |
| 228 | static ssize_t adt7410_set_temp(struct device *dev, |
| 229 | struct device_attribute *da, |
| 230 | const char *buf, size_t count) |
| 231 | { |
| 232 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 233 | struct i2c_client *client = to_i2c_client(dev); |
| 234 | struct adt7410_data *data = i2c_get_clientdata(client); |
| 235 | int nr = attr->index; |
| 236 | long temp; |
| 237 | int ret; |
| 238 | |
| 239 | ret = kstrtol(buf, 10, &temp); |
| 240 | if (ret) |
| 241 | return ret; |
| 242 | |
| 243 | mutex_lock(&data->update_lock); |
| 244 | data->temp[nr] = ADT7410_TEMP_TO_REG(temp); |
| 245 | ret = i2c_smbus_write_word_swapped(client, ADT7410_REG_TEMP[nr], |
| 246 | data->temp[nr]); |
| 247 | if (ret) |
| 248 | count = ret; |
| 249 | mutex_unlock(&data->update_lock); |
| 250 | return count; |
| 251 | } |
| 252 | |
| 253 | static ssize_t adt7410_show_t_hyst(struct device *dev, |
| 254 | struct device_attribute *da, |
| 255 | char *buf) |
| 256 | { |
| 257 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 258 | struct i2c_client *client = to_i2c_client(dev); |
| 259 | struct adt7410_data *data = i2c_get_clientdata(client); |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 260 | int nr = attr->index; |
Dan Carpenter | 37f9648 | 2012-08-15 10:49:43 +0300 | [diff] [blame] | 261 | int hyst; |
| 262 | |
Dan Carpenter | 37f9648 | 2012-08-15 10:49:43 +0300 | [diff] [blame] | 263 | hyst = (data->hyst & ADT7410_T_HYST_MASK) * 1000; |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 264 | |
| 265 | /* |
| 266 | * hysteresis is stored as a 4 bit offset in the device, convert it |
| 267 | * to an absolute value |
| 268 | */ |
| 269 | if (nr == 2) /* min has positive offset, others have negative */ |
| 270 | hyst = -hyst; |
| 271 | return sprintf(buf, "%d\n", |
| 272 | ADT7410_REG_TO_TEMP(data, data->temp[nr]) - hyst); |
| 273 | } |
| 274 | |
| 275 | static ssize_t adt7410_set_t_hyst(struct device *dev, |
| 276 | struct device_attribute *da, |
| 277 | const char *buf, size_t count) |
| 278 | { |
| 279 | struct i2c_client *client = to_i2c_client(dev); |
| 280 | struct adt7410_data *data = i2c_get_clientdata(client); |
| 281 | int limit, ret; |
| 282 | long hyst; |
| 283 | |
| 284 | ret = kstrtol(buf, 10, &hyst); |
| 285 | if (ret) |
| 286 | return ret; |
| 287 | /* convert absolute hysteresis value to a 4 bit delta value */ |
| 288 | limit = ADT7410_REG_TO_TEMP(data, data->temp[1]); |
Guenter Roeck | 2a844c1 | 2013-01-09 08:09:34 -0800 | [diff] [blame] | 289 | hyst = clamp_val(hyst, ADT7410_TEMP_MIN, ADT7410_TEMP_MAX); |
| 290 | data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), 0, |
| 291 | ADT7410_T_HYST_MASK); |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 292 | ret = i2c_smbus_write_byte_data(client, ADT7410_T_HYST, data->hyst); |
| 293 | if (ret) |
| 294 | return ret; |
| 295 | |
| 296 | return count; |
| 297 | } |
| 298 | |
| 299 | static ssize_t adt7410_show_alarm(struct device *dev, |
| 300 | struct device_attribute *da, |
| 301 | char *buf) |
| 302 | { |
| 303 | struct i2c_client *client = to_i2c_client(dev); |
| 304 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
| 305 | int ret; |
| 306 | |
| 307 | ret = i2c_smbus_read_byte_data(client, ADT7410_STATUS); |
| 308 | if (ret < 0) |
| 309 | return ret; |
| 310 | |
| 311 | return sprintf(buf, "%d\n", !!(ret & attr->index)); |
| 312 | } |
| 313 | |
| 314 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, adt7410_show_temp, NULL, 0); |
| 315 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
| 316 | adt7410_show_temp, adt7410_set_temp, 1); |
| 317 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, |
| 318 | adt7410_show_temp, adt7410_set_temp, 2); |
| 319 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, |
| 320 | adt7410_show_temp, adt7410_set_temp, 3); |
| 321 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, |
| 322 | adt7410_show_t_hyst, adt7410_set_t_hyst, 1); |
| 323 | static SENSOR_DEVICE_ATTR(temp1_min_hyst, S_IRUGO, |
| 324 | adt7410_show_t_hyst, NULL, 2); |
| 325 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, |
| 326 | adt7410_show_t_hyst, NULL, 3); |
| 327 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, adt7410_show_alarm, |
| 328 | NULL, ADT7410_STAT_T_LOW); |
| 329 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, adt7410_show_alarm, |
| 330 | NULL, ADT7410_STAT_T_HIGH); |
| 331 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, adt7410_show_alarm, |
| 332 | NULL, ADT7410_STAT_T_CRIT); |
| 333 | |
| 334 | static struct attribute *adt7410_attributes[] = { |
| 335 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 336 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
| 337 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
| 338 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
| 339 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
| 340 | &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, |
| 341 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, |
| 342 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, |
| 343 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
| 344 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
| 345 | NULL |
| 346 | }; |
| 347 | |
| 348 | static const struct attribute_group adt7410_group = { |
| 349 | .attrs = adt7410_attributes, |
| 350 | }; |
| 351 | |
| 352 | /*-----------------------------------------------------------------------*/ |
| 353 | |
| 354 | /* device probe and removal */ |
| 355 | |
| 356 | static int adt7410_probe(struct i2c_client *client, |
| 357 | const struct i2c_device_id *id) |
| 358 | { |
| 359 | struct adt7410_data *data; |
| 360 | int ret; |
| 361 | |
| 362 | if (!i2c_check_functionality(client->adapter, |
| 363 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) |
| 364 | return -ENODEV; |
| 365 | |
| 366 | data = devm_kzalloc(&client->dev, sizeof(struct adt7410_data), |
| 367 | GFP_KERNEL); |
| 368 | if (!data) |
| 369 | return -ENOMEM; |
| 370 | |
| 371 | i2c_set_clientdata(client, data); |
| 372 | mutex_init(&data->update_lock); |
| 373 | |
| 374 | /* configure as specified */ |
| 375 | ret = i2c_smbus_read_byte_data(client, ADT7410_CONFIG); |
| 376 | if (ret < 0) { |
| 377 | dev_dbg(&client->dev, "Can't read config? %d\n", ret); |
| 378 | return ret; |
| 379 | } |
| 380 | data->oldconfig = ret; |
| 381 | /* |
| 382 | * Set to 16 bit resolution, continous conversion and comparator mode. |
| 383 | */ |
Lars-Peter Clausen | 6e7d3b6 | 2013-02-15 17:57:10 +0100 | [diff] [blame] | 384 | ret &= ~ADT7410_MODE_MASK; |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 385 | data->config = ret | ADT7410_FULL | ADT7410_RESOLUTION | |
| 386 | ADT7410_EVENT_MODE; |
| 387 | if (data->config != data->oldconfig) { |
| 388 | ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG, |
| 389 | data->config); |
| 390 | if (ret) |
| 391 | return ret; |
| 392 | } |
| 393 | dev_dbg(&client->dev, "Config %02x\n", data->config); |
| 394 | |
Lars-Peter Clausen | c55dc91 | 2013-03-12 11:38:45 +0100 | [diff] [blame^] | 395 | ret = adt7410_fill_cache(client); |
| 396 | if (ret) |
| 397 | goto exit_restore; |
| 398 | |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 399 | /* Register sysfs hooks */ |
| 400 | ret = sysfs_create_group(&client->dev.kobj, &adt7410_group); |
| 401 | if (ret) |
| 402 | goto exit_restore; |
| 403 | |
| 404 | data->hwmon_dev = hwmon_device_register(&client->dev); |
| 405 | if (IS_ERR(data->hwmon_dev)) { |
| 406 | ret = PTR_ERR(data->hwmon_dev); |
| 407 | goto exit_remove; |
| 408 | } |
| 409 | |
| 410 | dev_info(&client->dev, "sensor '%s'\n", client->name); |
| 411 | |
| 412 | return 0; |
| 413 | |
| 414 | exit_remove: |
| 415 | sysfs_remove_group(&client->dev.kobj, &adt7410_group); |
| 416 | exit_restore: |
| 417 | i2c_smbus_write_byte_data(client, ADT7410_CONFIG, data->oldconfig); |
| 418 | return ret; |
| 419 | } |
| 420 | |
| 421 | static int adt7410_remove(struct i2c_client *client) |
| 422 | { |
| 423 | struct adt7410_data *data = i2c_get_clientdata(client); |
| 424 | |
| 425 | hwmon_device_unregister(data->hwmon_dev); |
| 426 | sysfs_remove_group(&client->dev.kobj, &adt7410_group); |
| 427 | if (data->oldconfig != data->config) |
| 428 | i2c_smbus_write_byte_data(client, ADT7410_CONFIG, |
| 429 | data->oldconfig); |
| 430 | return 0; |
| 431 | } |
| 432 | |
| 433 | static const struct i2c_device_id adt7410_ids[] = { |
| 434 | { "adt7410", adt7410, }, |
Lars-Peter Clausen | e46e5dc | 2013-02-15 17:57:14 +0100 | [diff] [blame] | 435 | { "adt7420", adt7410, }, |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 436 | { /* LIST END */ } |
| 437 | }; |
| 438 | MODULE_DEVICE_TABLE(i2c, adt7410_ids); |
| 439 | |
Lars-Peter Clausen | e0db9c4 | 2013-02-15 17:57:11 +0100 | [diff] [blame] | 440 | #ifdef CONFIG_PM_SLEEP |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 441 | static int adt7410_suspend(struct device *dev) |
| 442 | { |
| 443 | int ret; |
| 444 | struct i2c_client *client = to_i2c_client(dev); |
| 445 | struct adt7410_data *data = i2c_get_clientdata(client); |
| 446 | |
| 447 | ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG, |
| 448 | data->config | ADT7410_PD); |
| 449 | return ret; |
| 450 | } |
| 451 | |
| 452 | static int adt7410_resume(struct device *dev) |
| 453 | { |
| 454 | int ret; |
| 455 | struct i2c_client *client = to_i2c_client(dev); |
| 456 | struct adt7410_data *data = i2c_get_clientdata(client); |
| 457 | |
| 458 | ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG, data->config); |
| 459 | return ret; |
| 460 | } |
| 461 | |
Lars-Peter Clausen | 436440f | 2013-02-15 17:57:12 +0100 | [diff] [blame] | 462 | static SIMPLE_DEV_PM_OPS(adt7410_dev_pm_ops, adt7410_suspend, adt7410_resume); |
| 463 | |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 464 | #define ADT7410_DEV_PM_OPS (&adt7410_dev_pm_ops) |
| 465 | #else |
| 466 | #define ADT7410_DEV_PM_OPS NULL |
| 467 | #endif /* CONFIG_PM */ |
| 468 | |
| 469 | static struct i2c_driver adt7410_driver = { |
| 470 | .class = I2C_CLASS_HWMON, |
| 471 | .driver = { |
| 472 | .name = "adt7410", |
| 473 | .pm = ADT7410_DEV_PM_OPS, |
| 474 | }, |
| 475 | .probe = adt7410_probe, |
| 476 | .remove = adt7410_remove, |
| 477 | .id_table = adt7410_ids, |
Lars-Peter Clausen | 54be068 | 2013-02-15 17:57:13 +0100 | [diff] [blame] | 478 | .address_list = I2C_ADDRS(0x48, 0x49, 0x4a, 0x4b), |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 479 | }; |
| 480 | |
| 481 | module_i2c_driver(adt7410_driver); |
| 482 | |
| 483 | MODULE_AUTHOR("Hartmut Knaack"); |
Lars-Peter Clausen | e46e5dc | 2013-02-15 17:57:14 +0100 | [diff] [blame] | 484 | MODULE_DESCRIPTION("ADT7410/ADT7420 driver"); |
Hartmut Knaack | 983b97b | 2012-08-12 18:15:49 +0200 | [diff] [blame] | 485 | MODULE_LICENSE("GPL"); |