Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 1 | /* |
| 2 | * lm95241.c - Part of lm_sensors, Linux kernel modules for hardware |
| 3 | * monitoring |
| 4 | * Copyright (C) 2008 Davide Rizzo <elpa-rizzo@gmail.com> |
| 5 | * |
| 6 | * Based on the max1619 driver. The LM95241 is a sensor chip made by National |
| 7 | * Semiconductors. |
| 8 | * It reports up to three temperatures (its own plus up to |
| 9 | * two external ones). Complete datasheet can be |
| 10 | * obtained from National's website at: |
| 11 | * http://www.national.com/ds.cgi/LM/LM95241.pdf |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | */ |
| 27 | |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/jiffies.h> |
| 32 | #include <linux/i2c.h> |
| 33 | #include <linux/hwmon.h> |
| 34 | #include <linux/hwmon-sysfs.h> |
| 35 | #include <linux/err.h> |
| 36 | #include <linux/mutex.h> |
| 37 | #include <linux/sysfs.h> |
| 38 | |
| 39 | static const unsigned short normal_i2c[] = { |
| 40 | 0x19, 0x2a, 0x2b, I2C_CLIENT_END}; |
| 41 | |
| 42 | /* Insmod parameters */ |
| 43 | I2C_CLIENT_INSMOD_1(lm95241); |
| 44 | |
| 45 | /* LM95241 registers */ |
| 46 | #define LM95241_REG_R_MAN_ID 0xFE |
| 47 | #define LM95241_REG_R_CHIP_ID 0xFF |
| 48 | #define LM95241_REG_R_STATUS 0x02 |
| 49 | #define LM95241_REG_RW_CONFIG 0x03 |
| 50 | #define LM95241_REG_RW_REM_FILTER 0x06 |
| 51 | #define LM95241_REG_RW_TRUTHERM 0x07 |
| 52 | #define LM95241_REG_W_ONE_SHOT 0x0F |
| 53 | #define LM95241_REG_R_LOCAL_TEMPH 0x10 |
| 54 | #define LM95241_REG_R_REMOTE1_TEMPH 0x11 |
| 55 | #define LM95241_REG_R_REMOTE2_TEMPH 0x12 |
| 56 | #define LM95241_REG_R_LOCAL_TEMPL 0x20 |
| 57 | #define LM95241_REG_R_REMOTE1_TEMPL 0x21 |
| 58 | #define LM95241_REG_R_REMOTE2_TEMPL 0x22 |
| 59 | #define LM95241_REG_RW_REMOTE_MODEL 0x30 |
| 60 | |
| 61 | /* LM95241 specific bitfields */ |
| 62 | #define CFG_STOP 0x40 |
| 63 | #define CFG_CR0076 0x00 |
| 64 | #define CFG_CR0182 0x10 |
| 65 | #define CFG_CR1000 0x20 |
| 66 | #define CFG_CR2700 0x30 |
| 67 | #define R1MS_SHIFT 0 |
| 68 | #define R2MS_SHIFT 2 |
| 69 | #define R1MS_MASK (0x01 << (R1MS_SHIFT)) |
| 70 | #define R2MS_MASK (0x01 << (R2MS_SHIFT)) |
| 71 | #define R1DF_SHIFT 1 |
| 72 | #define R2DF_SHIFT 2 |
| 73 | #define R1DF_MASK (0x01 << (R1DF_SHIFT)) |
| 74 | #define R2DF_MASK (0x01 << (R2DF_SHIFT)) |
| 75 | #define R1FE_MASK 0x01 |
| 76 | #define R2FE_MASK 0x05 |
| 77 | #define TT1_SHIFT 0 |
| 78 | #define TT2_SHIFT 4 |
| 79 | #define TT_OFF 0 |
| 80 | #define TT_ON 1 |
| 81 | #define TT_MASK 7 |
| 82 | #define MANUFACTURER_ID 0x01 |
| 83 | #define DEFAULT_REVISION 0xA4 |
| 84 | |
| 85 | /* Conversions and various macros */ |
| 86 | #define TEMP_FROM_REG(val_h, val_l) (((val_h) & 0x80 ? (val_h) - 0x100 : \ |
| 87 | (val_h)) * 1000 + (val_l) * 1000 / 256) |
| 88 | |
| 89 | /* Functions declaration */ |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 90 | static void lm95241_init_client(struct i2c_client *client); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 91 | static struct lm95241_data *lm95241_update_device(struct device *dev); |
| 92 | |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 93 | /* Client data (each client gets its own) */ |
| 94 | struct lm95241_data { |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 95 | struct device *hwmon_dev; |
| 96 | struct mutex update_lock; |
| 97 | unsigned long last_updated, rate; /* in jiffies */ |
| 98 | char valid; /* zero until following fields are valid */ |
| 99 | /* registers values */ |
| 100 | u8 local_h, local_l; /* local */ |
| 101 | u8 remote1_h, remote1_l; /* remote1 */ |
| 102 | u8 remote2_h, remote2_l; /* remote2 */ |
| 103 | u8 config, model, trutherm; |
| 104 | }; |
| 105 | |
| 106 | /* Sysfs stuff */ |
| 107 | #define show_temp(value) \ |
| 108 | static ssize_t show_##value(struct device *dev, \ |
| 109 | struct device_attribute *attr, char *buf) \ |
| 110 | { \ |
| 111 | struct lm95241_data *data = lm95241_update_device(dev); \ |
| 112 | snprintf(buf, PAGE_SIZE - 1, "%d\n", \ |
| 113 | TEMP_FROM_REG(data->value##_h, data->value##_l)); \ |
| 114 | return strlen(buf); \ |
| 115 | } |
| 116 | show_temp(local); |
| 117 | show_temp(remote1); |
| 118 | show_temp(remote2); |
| 119 | |
| 120 | static ssize_t show_rate(struct device *dev, struct device_attribute *attr, |
| 121 | char *buf) |
| 122 | { |
| 123 | struct lm95241_data *data = lm95241_update_device(dev); |
| 124 | |
| 125 | snprintf(buf, PAGE_SIZE - 1, "%lu\n", 1000 * data->rate / HZ); |
| 126 | return strlen(buf); |
| 127 | } |
| 128 | |
| 129 | static ssize_t set_rate(struct device *dev, struct device_attribute *attr, |
| 130 | const char *buf, size_t count) |
| 131 | { |
| 132 | struct i2c_client *client = to_i2c_client(dev); |
| 133 | struct lm95241_data *data = i2c_get_clientdata(client); |
| 134 | |
| 135 | strict_strtol(buf, 10, &data->rate); |
| 136 | data->rate = data->rate * HZ / 1000; |
| 137 | |
| 138 | return count; |
| 139 | } |
| 140 | |
| 141 | #define show_type(flag) \ |
| 142 | static ssize_t show_type##flag(struct device *dev, \ |
| 143 | struct device_attribute *attr, char *buf) \ |
| 144 | { \ |
| 145 | struct i2c_client *client = to_i2c_client(dev); \ |
| 146 | struct lm95241_data *data = i2c_get_clientdata(client); \ |
| 147 | \ |
| 148 | snprintf(buf, PAGE_SIZE - 1, \ |
| 149 | data->model & R##flag##MS_MASK ? "1\n" : "2\n"); \ |
| 150 | return strlen(buf); \ |
| 151 | } |
| 152 | show_type(1); |
| 153 | show_type(2); |
| 154 | |
| 155 | #define show_min(flag) \ |
| 156 | static ssize_t show_min##flag(struct device *dev, \ |
| 157 | struct device_attribute *attr, char *buf) \ |
| 158 | { \ |
| 159 | struct i2c_client *client = to_i2c_client(dev); \ |
| 160 | struct lm95241_data *data = i2c_get_clientdata(client); \ |
| 161 | \ |
| 162 | snprintf(buf, PAGE_SIZE - 1, \ |
| 163 | data->config & R##flag##DF_MASK ? \ |
| 164 | "-127000\n" : "0\n"); \ |
| 165 | return strlen(buf); \ |
| 166 | } |
| 167 | show_min(1); |
| 168 | show_min(2); |
| 169 | |
| 170 | #define show_max(flag) \ |
| 171 | static ssize_t show_max##flag(struct device *dev, \ |
| 172 | struct device_attribute *attr, char *buf) \ |
| 173 | { \ |
| 174 | struct i2c_client *client = to_i2c_client(dev); \ |
| 175 | struct lm95241_data *data = i2c_get_clientdata(client); \ |
| 176 | \ |
| 177 | snprintf(buf, PAGE_SIZE - 1, \ |
| 178 | data->config & R##flag##DF_MASK ? \ |
| 179 | "127000\n" : "255000\n"); \ |
| 180 | return strlen(buf); \ |
| 181 | } |
| 182 | show_max(1); |
| 183 | show_max(2); |
| 184 | |
| 185 | #define set_type(flag) \ |
| 186 | static ssize_t set_type##flag(struct device *dev, \ |
| 187 | struct device_attribute *attr, \ |
| 188 | const char *buf, size_t count) \ |
| 189 | { \ |
| 190 | struct i2c_client *client = to_i2c_client(dev); \ |
| 191 | struct lm95241_data *data = i2c_get_clientdata(client); \ |
| 192 | \ |
| 193 | long val; \ |
| 194 | strict_strtol(buf, 10, &val); \ |
| 195 | \ |
| 196 | if ((val == 1) || (val == 2)) { \ |
| 197 | \ |
| 198 | mutex_lock(&data->update_lock); \ |
| 199 | \ |
| 200 | data->trutherm &= ~(TT_MASK << TT##flag##_SHIFT); \ |
| 201 | if (val == 1) { \ |
| 202 | data->model |= R##flag##MS_MASK; \ |
| 203 | data->trutherm |= (TT_ON << TT##flag##_SHIFT); \ |
| 204 | } \ |
| 205 | else { \ |
| 206 | data->model &= ~R##flag##MS_MASK; \ |
| 207 | data->trutherm |= (TT_OFF << TT##flag##_SHIFT); \ |
| 208 | } \ |
| 209 | \ |
| 210 | data->valid = 0; \ |
| 211 | \ |
| 212 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL, \ |
| 213 | data->model); \ |
| 214 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM, \ |
| 215 | data->trutherm); \ |
| 216 | \ |
| 217 | mutex_unlock(&data->update_lock); \ |
| 218 | \ |
| 219 | } \ |
| 220 | return count; \ |
| 221 | } |
| 222 | set_type(1); |
| 223 | set_type(2); |
| 224 | |
| 225 | #define set_min(flag) \ |
| 226 | static ssize_t set_min##flag(struct device *dev, \ |
| 227 | struct device_attribute *devattr, const char *buf, size_t count) \ |
| 228 | { \ |
| 229 | struct i2c_client *client = to_i2c_client(dev); \ |
| 230 | struct lm95241_data *data = i2c_get_clientdata(client); \ |
| 231 | \ |
| 232 | long val; \ |
| 233 | strict_strtol(buf, 10, &val); \ |
| 234 | \ |
| 235 | mutex_lock(&data->update_lock); \ |
| 236 | \ |
| 237 | if (val < 0) \ |
| 238 | data->config |= R##flag##DF_MASK; \ |
| 239 | else \ |
| 240 | data->config &= ~R##flag##DF_MASK; \ |
| 241 | \ |
| 242 | data->valid = 0; \ |
| 243 | \ |
| 244 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, \ |
| 245 | data->config); \ |
| 246 | \ |
| 247 | mutex_unlock(&data->update_lock); \ |
| 248 | \ |
| 249 | return count; \ |
| 250 | } |
| 251 | set_min(1); |
| 252 | set_min(2); |
| 253 | |
| 254 | #define set_max(flag) \ |
| 255 | static ssize_t set_max##flag(struct device *dev, \ |
| 256 | struct device_attribute *devattr, const char *buf, size_t count) \ |
| 257 | { \ |
| 258 | struct i2c_client *client = to_i2c_client(dev); \ |
| 259 | struct lm95241_data *data = i2c_get_clientdata(client); \ |
| 260 | \ |
| 261 | long val; \ |
| 262 | strict_strtol(buf, 10, &val); \ |
| 263 | \ |
| 264 | mutex_lock(&data->update_lock); \ |
| 265 | \ |
| 266 | if (val <= 127000) \ |
| 267 | data->config |= R##flag##DF_MASK; \ |
| 268 | else \ |
| 269 | data->config &= ~R##flag##DF_MASK; \ |
| 270 | \ |
| 271 | data->valid = 0; \ |
| 272 | \ |
| 273 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, \ |
| 274 | data->config); \ |
| 275 | \ |
| 276 | mutex_unlock(&data->update_lock); \ |
| 277 | \ |
| 278 | return count; \ |
| 279 | } |
| 280 | set_max(1); |
| 281 | set_max(2); |
| 282 | |
| 283 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_local, NULL); |
| 284 | static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote1, NULL); |
| 285 | static DEVICE_ATTR(temp3_input, S_IRUGO, show_remote2, NULL); |
| 286 | static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type1, set_type1); |
| 287 | static DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type2, set_type2); |
| 288 | static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min1, set_min1); |
| 289 | static DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min2, set_min2); |
| 290 | static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max1, set_max1); |
| 291 | static DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max2, set_max2); |
| 292 | static DEVICE_ATTR(rate, S_IWUSR | S_IRUGO, show_rate, set_rate); |
| 293 | |
| 294 | static struct attribute *lm95241_attributes[] = { |
| 295 | &dev_attr_temp1_input.attr, |
| 296 | &dev_attr_temp2_input.attr, |
| 297 | &dev_attr_temp3_input.attr, |
| 298 | &dev_attr_temp2_type.attr, |
| 299 | &dev_attr_temp3_type.attr, |
| 300 | &dev_attr_temp2_min.attr, |
| 301 | &dev_attr_temp3_min.attr, |
| 302 | &dev_attr_temp2_max.attr, |
| 303 | &dev_attr_temp3_max.attr, |
| 304 | &dev_attr_rate.attr, |
| 305 | NULL |
| 306 | }; |
| 307 | |
| 308 | static const struct attribute_group lm95241_group = { |
| 309 | .attrs = lm95241_attributes, |
| 310 | }; |
| 311 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 312 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
| 313 | static int lm95241_detect(struct i2c_client *new_client, int kind, |
| 314 | struct i2c_board_info *info) |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 315 | { |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 316 | struct i2c_adapter *adapter = new_client->adapter; |
| 317 | int address = new_client->addr; |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame] | 318 | const char *name; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 319 | |
| 320 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 321 | return -ENODEV; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 322 | |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame] | 323 | if ((i2c_smbus_read_byte_data(new_client, LM95241_REG_R_MAN_ID) |
| 324 | == MANUFACTURER_ID) |
| 325 | && (i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID) |
| 326 | >= DEFAULT_REVISION)) { |
| 327 | name = "lm95241"; |
| 328 | } else { |
| 329 | dev_dbg(&adapter->dev, "LM95241 detection failed at 0x%02x\n", |
| 330 | address); |
| 331 | return -ENODEV; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 332 | } |
| 333 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 334 | /* Fill the i2c board info */ |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 335 | strlcpy(info->type, name, I2C_NAME_SIZE); |
| 336 | return 0; |
| 337 | } |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 338 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 339 | static int lm95241_probe(struct i2c_client *new_client, |
| 340 | const struct i2c_device_id *id) |
| 341 | { |
| 342 | struct lm95241_data *data; |
| 343 | int err; |
| 344 | |
| 345 | data = kzalloc(sizeof(struct lm95241_data), GFP_KERNEL); |
| 346 | if (!data) { |
| 347 | err = -ENOMEM; |
| 348 | goto exit; |
| 349 | } |
| 350 | |
| 351 | i2c_set_clientdata(new_client, data); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 352 | mutex_init(&data->update_lock); |
| 353 | |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 354 | /* Initialize the LM95241 chip */ |
| 355 | lm95241_init_client(new_client); |
| 356 | |
| 357 | /* Register sysfs hooks */ |
| 358 | err = sysfs_create_group(&new_client->dev.kobj, &lm95241_group); |
| 359 | if (err) |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 360 | goto exit_free; |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 361 | |
| 362 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
| 363 | if (IS_ERR(data->hwmon_dev)) { |
| 364 | err = PTR_ERR(data->hwmon_dev); |
| 365 | goto exit_remove_files; |
| 366 | } |
| 367 | |
| 368 | return 0; |
| 369 | |
| 370 | exit_remove_files: |
| 371 | sysfs_remove_group(&new_client->dev.kobj, &lm95241_group); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 372 | exit_free: |
| 373 | kfree(data); |
| 374 | exit: |
| 375 | return err; |
| 376 | } |
| 377 | |
| 378 | static void lm95241_init_client(struct i2c_client *client) |
| 379 | { |
| 380 | struct lm95241_data *data = i2c_get_clientdata(client); |
| 381 | |
| 382 | data->rate = HZ; /* 1 sec default */ |
| 383 | data->valid = 0; |
| 384 | data->config = CFG_CR0076; |
| 385 | data->model = 0; |
| 386 | data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT); |
| 387 | |
| 388 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, |
| 389 | data->config); |
| 390 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_REM_FILTER, |
| 391 | R1FE_MASK | R2FE_MASK); |
| 392 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM, |
| 393 | data->trutherm); |
| 394 | i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL, |
| 395 | data->model); |
| 396 | } |
| 397 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 398 | static int lm95241_remove(struct i2c_client *client) |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 399 | { |
| 400 | struct lm95241_data *data = i2c_get_clientdata(client); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 401 | |
| 402 | hwmon_device_unregister(data->hwmon_dev); |
| 403 | sysfs_remove_group(&client->dev.kobj, &lm95241_group); |
| 404 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 405 | i2c_set_clientdata(client, NULL); |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 406 | kfree(data); |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | static struct lm95241_data *lm95241_update_device(struct device *dev) |
| 411 | { |
| 412 | struct i2c_client *client = to_i2c_client(dev); |
| 413 | struct lm95241_data *data = i2c_get_clientdata(client); |
| 414 | |
| 415 | mutex_lock(&data->update_lock); |
| 416 | |
| 417 | if (time_after(jiffies, data->last_updated + data->rate) || |
| 418 | !data->valid) { |
| 419 | dev_dbg(&client->dev, "Updating lm95241 data.\n"); |
| 420 | data->local_h = |
| 421 | i2c_smbus_read_byte_data(client, |
| 422 | LM95241_REG_R_LOCAL_TEMPH); |
| 423 | data->local_l = |
| 424 | i2c_smbus_read_byte_data(client, |
| 425 | LM95241_REG_R_LOCAL_TEMPL); |
| 426 | data->remote1_h = |
| 427 | i2c_smbus_read_byte_data(client, |
| 428 | LM95241_REG_R_REMOTE1_TEMPH); |
| 429 | data->remote1_l = |
| 430 | i2c_smbus_read_byte_data(client, |
| 431 | LM95241_REG_R_REMOTE1_TEMPL); |
| 432 | data->remote2_h = |
| 433 | i2c_smbus_read_byte_data(client, |
| 434 | LM95241_REG_R_REMOTE2_TEMPH); |
| 435 | data->remote2_l = |
| 436 | i2c_smbus_read_byte_data(client, |
| 437 | LM95241_REG_R_REMOTE2_TEMPL); |
| 438 | data->last_updated = jiffies; |
| 439 | data->valid = 1; |
| 440 | } |
| 441 | |
| 442 | mutex_unlock(&data->update_lock); |
| 443 | |
| 444 | return data; |
| 445 | } |
| 446 | |
Jean Delvare | 797eaa4 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 447 | /* Driver data (common to all clients) */ |
| 448 | static const struct i2c_device_id lm95241_id[] = { |
| 449 | { "lm95241", lm95241 }, |
| 450 | { } |
| 451 | }; |
| 452 | MODULE_DEVICE_TABLE(i2c, lm95241_id); |
| 453 | |
| 454 | static struct i2c_driver lm95241_driver = { |
| 455 | .class = I2C_CLASS_HWMON, |
| 456 | .driver = { |
| 457 | .name = "lm95241", |
| 458 | }, |
| 459 | .probe = lm95241_probe, |
| 460 | .remove = lm95241_remove, |
| 461 | .id_table = lm95241_id, |
| 462 | .detect = lm95241_detect, |
| 463 | .address_data = &addr_data, |
| 464 | }; |
| 465 | |
Davide Rizzo | 0616032 | 2009-03-31 15:24:27 -0700 | [diff] [blame] | 466 | static int __init sensors_lm95241_init(void) |
| 467 | { |
| 468 | return i2c_add_driver(&lm95241_driver); |
| 469 | } |
| 470 | |
| 471 | static void __exit sensors_lm95241_exit(void) |
| 472 | { |
| 473 | i2c_del_driver(&lm95241_driver); |
| 474 | } |
| 475 | |
| 476 | MODULE_AUTHOR("Davide Rizzo <elpa-rizzo@gmail.com>"); |
| 477 | MODULE_DESCRIPTION("LM95241 sensor driver"); |
| 478 | MODULE_LICENSE("GPL"); |
| 479 | |
| 480 | module_init(sensors_lm95241_init); |
| 481 | module_exit(sensors_lm95241_exit); |