blob: a83f206af2442c2fce7de86a4b335a240e50b744 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Shubhrajyoti Dcaaa0f32010-10-28 20:31:44 +02002 * lm75.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/slab.h>
24#include <linux/jiffies.h>
25#include <linux/i2c.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040026#include <linux/hwmon.h>
Jean Delvare9ca8e40c82007-05-08 17:22:01 +020027#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040028#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010029#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "lm75.h"
31
32
David Brownell01a52392008-04-21 12:10:53 -070033/*
34 * This driver handles the LM75 and compatible digital temperature sensors.
David Brownell01a52392008-04-21 12:10:53 -070035 */
36
David Brownell9ebd3d82008-05-03 19:33:15 -070037enum lm75_type { /* keep sorted in alphabetical order */
Michael Henneriche96f9d82011-10-13 04:43:31 -040038 adt75,
Jean Delvare1f86df42009-12-14 21:17:26 +010039 ds1775,
David Brownell9ebd3d82008-05-03 19:33:15 -070040 ds75,
Jean Delvare1f86df42009-12-14 21:17:26 +010041 lm75,
David Brownell9ebd3d82008-05-03 19:33:15 -070042 lm75a,
43 max6625,
44 max6626,
45 mcp980x,
46 stds75,
47 tcn75,
48 tmp100,
49 tmp101,
Shubhrajyoti Datta6d034052010-05-27 19:59:03 +020050 tmp105,
David Brownell9ebd3d82008-05-03 19:33:15 -070051 tmp175,
52 tmp275,
53 tmp75,
54};
55
Jean Delvare8ff69ee2008-08-10 22:56:16 +020056/* Addresses scanned */
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050057static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61/* The LM75 registers */
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#define LM75_REG_CONF 0x01
Jean Delvare9ca8e40c82007-05-08 17:22:01 +020063static const u8 LM75_REG_TEMP[3] = {
64 0x00, /* input */
65 0x03, /* max */
66 0x02, /* hyst */
67};
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69/* Each client has this additional data */
70struct lm75_data {
David Brownell01a52392008-04-21 12:10:53 -070071 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +010072 struct mutex update_lock;
David Brownell9ebd3d82008-05-03 19:33:15 -070073 u8 orig_conf;
David Brownell01a52392008-04-21 12:10:53 -070074 char valid; /* !=0 if registers are valid */
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 unsigned long last_updated; /* In jiffies */
Jean Delvare9ca8e40c82007-05-08 17:22:01 +020076 u16 temp[3]; /* Register values,
77 0 = input
78 1 = max
79 2 = hyst */
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082static int lm75_read_value(struct i2c_client *client, u8 reg);
83static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value);
84static struct lm75_data *lm75_update_device(struct device *dev);
85
86
David Brownell01a52392008-04-21 12:10:53 -070087/*-----------------------------------------------------------------------*/
88
89/* sysfs attributes for hwmon */
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Jean Delvare9ca8e40c82007-05-08 17:22:01 +020091static ssize_t show_temp(struct device *dev, struct device_attribute *da,
92 char *buf)
93{
94 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
95 struct lm75_data *data = lm75_update_device(dev);
Frans Meulenbroeks1f962f32012-01-03 12:02:40 +010096
97 if (IS_ERR(data))
98 return PTR_ERR(data);
99
Jean Delvare9ca8e40c82007-05-08 17:22:01 +0200100 return sprintf(buf, "%d\n",
101 LM75_TEMP_FROM_REG(data->temp[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Jean Delvare9ca8e40c82007-05-08 17:22:01 +0200104static ssize_t set_temp(struct device *dev, struct device_attribute *da,
105 const char *buf, size_t count)
106{
107 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
108 struct i2c_client *client = to_i2c_client(dev);
109 struct lm75_data *data = i2c_get_clientdata(client);
110 int nr = attr->index;
Shubhrajyoti De3cd9522010-10-28 20:31:44 +0200111 long temp;
112 int error;
113
Frans Meulenbroeks24edc0a2012-01-03 12:02:41 +0100114 error = kstrtol(buf, 10, &temp);
Shubhrajyoti De3cd9522010-10-28 20:31:44 +0200115 if (error)
116 return error;
Jean Delvare9ca8e40c82007-05-08 17:22:01 +0200117
118 mutex_lock(&data->update_lock);
119 data->temp[nr] = LM75_TEMP_TO_REG(temp);
120 lm75_write_value(client, LM75_REG_TEMP[nr], data->temp[nr]);
121 mutex_unlock(&data->update_lock);
122 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Jean Delvare9ca8e40c82007-05-08 17:22:01 +0200125static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
126 show_temp, set_temp, 1);
127static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
128 show_temp, set_temp, 2);
129static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200131static struct attribute *lm75_attributes[] = {
Jean Delvare9ca8e40c82007-05-08 17:22:01 +0200132 &sensor_dev_attr_temp1_input.dev_attr.attr,
133 &sensor_dev_attr_temp1_max.dev_attr.attr,
134 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200135
136 NULL
137};
138
139static const struct attribute_group lm75_group = {
140 .attrs = lm75_attributes,
141};
142
David Brownell01a52392008-04-21 12:10:53 -0700143/*-----------------------------------------------------------------------*/
144
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200145/* device probe and removal */
David Brownell9ebd3d82008-05-03 19:33:15 -0700146
147static int
148lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
149{
150 struct lm75_data *data;
151 int status;
152 u8 set_mask, clr_mask;
153 int new;
154
155 if (!i2c_check_functionality(client->adapter,
156 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
157 return -EIO;
158
159 data = kzalloc(sizeof(struct lm75_data), GFP_KERNEL);
160 if (!data)
161 return -ENOMEM;
162
163 i2c_set_clientdata(client, data);
David Brownell9ebd3d82008-05-03 19:33:15 -0700164 mutex_init(&data->update_lock);
165
166 /* Set to LM75 resolution (9 bits, 1/2 degree C) and range.
167 * Then tweak to be more precise when appropriate.
168 */
169 set_mask = 0;
170 clr_mask = (1 << 0) /* continuous conversions */
171 | (1 << 6) | (1 << 5); /* 9-bit mode */
172
173 /* configure as specified */
174 status = lm75_read_value(client, LM75_REG_CONF);
175 if (status < 0) {
176 dev_dbg(&client->dev, "Can't read config? %d\n", status);
177 goto exit_free;
178 }
179 data->orig_conf = status;
180 new = status & ~clr_mask;
181 new |= set_mask;
182 if (status != new)
183 lm75_write_value(client, LM75_REG_CONF, new);
184 dev_dbg(&client->dev, "Config %02x\n", new);
185
186 /* Register sysfs hooks */
187 status = sysfs_create_group(&client->dev.kobj, &lm75_group);
188 if (status)
189 goto exit_free;
190
191 data->hwmon_dev = hwmon_device_register(&client->dev);
192 if (IS_ERR(data->hwmon_dev)) {
193 status = PTR_ERR(data->hwmon_dev);
194 goto exit_remove;
195 }
196
197 dev_info(&client->dev, "%s: sensor '%s'\n",
Kay Sievers739cf3a2009-01-06 10:44:41 -0800198 dev_name(data->hwmon_dev), client->name);
David Brownell9ebd3d82008-05-03 19:33:15 -0700199
200 return 0;
201
202exit_remove:
203 sysfs_remove_group(&client->dev.kobj, &lm75_group);
204exit_free:
David Brownell9ebd3d82008-05-03 19:33:15 -0700205 kfree(data);
206 return status;
207}
208
209static int lm75_remove(struct i2c_client *client)
210{
211 struct lm75_data *data = i2c_get_clientdata(client);
212
213 hwmon_device_unregister(data->hwmon_dev);
214 sysfs_remove_group(&client->dev.kobj, &lm75_group);
215 lm75_write_value(client, LM75_REG_CONF, data->orig_conf);
David Brownell9ebd3d82008-05-03 19:33:15 -0700216 kfree(data);
217 return 0;
218}
219
220static const struct i2c_device_id lm75_ids[] = {
Michael Henneriche96f9d82011-10-13 04:43:31 -0400221 { "adt75", adt75, },
David Brownell9ebd3d82008-05-03 19:33:15 -0700222 { "ds1775", ds1775, },
223 { "ds75", ds75, },
224 { "lm75", lm75, },
225 { "lm75a", lm75a, },
226 { "max6625", max6625, },
227 { "max6626", max6626, },
228 { "mcp980x", mcp980x, },
229 { "stds75", stds75, },
230 { "tcn75", tcn75, },
231 { "tmp100", tmp100, },
232 { "tmp101", tmp101, },
Shubhrajyoti Datta6d034052010-05-27 19:59:03 +0200233 { "tmp105", tmp105, },
David Brownell9ebd3d82008-05-03 19:33:15 -0700234 { "tmp175", tmp175, },
235 { "tmp275", tmp275, },
236 { "tmp75", tmp75, },
237 { /* LIST END */ }
238};
239MODULE_DEVICE_TABLE(i2c, lm75_ids);
240
Len Sorensen05e82fe2011-03-21 17:59:36 +0100241#define LM75A_ID 0xA1
242
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200243/* Return 0 if detection is successful, -ENODEV otherwise */
Jean Delvare310ec792009-12-14 21:17:23 +0100244static int lm75_detect(struct i2c_client *new_client,
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200245 struct i2c_board_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246{
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200247 struct i2c_adapter *adapter = new_client->adapter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 int i;
Jean Delvaree76f67b2011-03-21 17:59:36 +0100249 int conf, hyst, os;
Len Sorensen05e82fe2011-03-21 17:59:36 +0100250 bool is_lm75a = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
253 I2C_FUNC_SMBUS_WORD_DATA))
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200254 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Jean Delvare426343e2011-10-13 17:15:11 -0400256 /*
257 * Now, we do the remaining detection. There is no identification-
258 * dedicated register so we have to rely on several tricks:
259 * unused bits, registers cycling over 8-address boundaries,
260 * addresses 0x04-0x07 returning the last read value.
261 * The cycling+unused addresses combination is not tested,
262 * since it would significantly slow the detection down and would
263 * hardly add any value.
264 *
265 * The National Semiconductor LM75A is different than earlier
266 * LM75s. It has an ID byte of 0xaX (where X is the chip
267 * revision, with 1 being the only revision in existence) in
268 * register 7, and unused registers return 0xff rather than the
269 * last read value.
270 *
271 * Note that this function only detects the original National
272 * Semiconductor LM75 and the LM75A. Clones from other vendors
273 * aren't detected, on purpose, because they are typically never
274 * found on PC hardware. They are found on embedded designs where
275 * they can be instantiated explicitly so detection is not needed.
276 * The absence of identification registers on all these clones
277 * would make their exhaustive detection very difficult and weak,
278 * and odds are that the driver would bind to unsupported devices.
279 */
Len Sorensen05e82fe2011-03-21 17:59:36 +0100280
Jean Delvaree76f67b2011-03-21 17:59:36 +0100281 /* Unused bits */
Jean Delvare52df6442009-12-09 20:35:57 +0100282 conf = i2c_smbus_read_byte_data(new_client, 1);
Jean Delvaree76f67b2011-03-21 17:59:36 +0100283 if (conf & 0xe0)
284 return -ENODEV;
Len Sorensen05e82fe2011-03-21 17:59:36 +0100285
286 /* First check for LM75A */
287 if (i2c_smbus_read_byte_data(new_client, 7) == LM75A_ID) {
288 /* LM75A returns 0xff on unused registers so
289 just to be sure we check for that too. */
290 if (i2c_smbus_read_byte_data(new_client, 4) != 0xff
291 || i2c_smbus_read_byte_data(new_client, 5) != 0xff
292 || i2c_smbus_read_byte_data(new_client, 6) != 0xff)
293 return -ENODEV;
294 is_lm75a = 1;
Jean Delvaree76f67b2011-03-21 17:59:36 +0100295 hyst = i2c_smbus_read_byte_data(new_client, 2);
296 os = i2c_smbus_read_byte_data(new_client, 3);
Len Sorensen05e82fe2011-03-21 17:59:36 +0100297 } else { /* Traditional style LM75 detection */
298 /* Unused addresses */
Jean Delvaree76f67b2011-03-21 17:59:36 +0100299 hyst = i2c_smbus_read_byte_data(new_client, 2);
300 if (i2c_smbus_read_byte_data(new_client, 4) != hyst
301 || i2c_smbus_read_byte_data(new_client, 5) != hyst
302 || i2c_smbus_read_byte_data(new_client, 6) != hyst
303 || i2c_smbus_read_byte_data(new_client, 7) != hyst)
Len Sorensen05e82fe2011-03-21 17:59:36 +0100304 return -ENODEV;
Jean Delvaree76f67b2011-03-21 17:59:36 +0100305 os = i2c_smbus_read_byte_data(new_client, 3);
306 if (i2c_smbus_read_byte_data(new_client, 4) != os
307 || i2c_smbus_read_byte_data(new_client, 5) != os
308 || i2c_smbus_read_byte_data(new_client, 6) != os
309 || i2c_smbus_read_byte_data(new_client, 7) != os)
Len Sorensen05e82fe2011-03-21 17:59:36 +0100310 return -ENODEV;
311 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Jean Delvare52df6442009-12-09 20:35:57 +0100313 /* Addresses cycling */
Jean Delvaree76f67b2011-03-21 17:59:36 +0100314 for (i = 8; i <= 248; i += 40) {
Jean Delvare52df6442009-12-09 20:35:57 +0100315 if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
Jean Delvaree76f67b2011-03-21 17:59:36 +0100316 || i2c_smbus_read_byte_data(new_client, i + 2) != hyst
317 || i2c_smbus_read_byte_data(new_client, i + 3) != os)
Jean Delvare52df6442009-12-09 20:35:57 +0100318 return -ENODEV;
Len Sorensen05e82fe2011-03-21 17:59:36 +0100319 if (is_lm75a && i2c_smbus_read_byte_data(new_client, i + 7)
320 != LM75A_ID)
321 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 }
323
Len Sorensen05e82fe2011-03-21 17:59:36 +0100324 strlcpy(info->type, is_lm75a ? "lm75a" : "lm75", I2C_NAME_SIZE);
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327}
328
Shubhrajyoti Datta99145182010-08-14 21:08:50 +0200329#ifdef CONFIG_PM
330static int lm75_suspend(struct device *dev)
331{
332 int status;
333 struct i2c_client *client = to_i2c_client(dev);
334 status = lm75_read_value(client, LM75_REG_CONF);
335 if (status < 0) {
336 dev_dbg(&client->dev, "Can't read config? %d\n", status);
337 return status;
338 }
339 status = status | LM75_SHUTDOWN;
340 lm75_write_value(client, LM75_REG_CONF, status);
341 return 0;
342}
343
344static int lm75_resume(struct device *dev)
345{
346 int status;
347 struct i2c_client *client = to_i2c_client(dev);
348 status = lm75_read_value(client, LM75_REG_CONF);
349 if (status < 0) {
350 dev_dbg(&client->dev, "Can't read config? %d\n", status);
351 return status;
352 }
353 status = status & ~LM75_SHUTDOWN;
354 lm75_write_value(client, LM75_REG_CONF, status);
355 return 0;
356}
357
358static const struct dev_pm_ops lm75_dev_pm_ops = {
359 .suspend = lm75_suspend,
360 .resume = lm75_resume,
361};
362#define LM75_DEV_PM_OPS (&lm75_dev_pm_ops)
363#else
364#define LM75_DEV_PM_OPS NULL
365#endif /* CONFIG_PM */
366
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200367static struct i2c_driver lm75_driver = {
368 .class = I2C_CLASS_HWMON,
David Brownell01a52392008-04-21 12:10:53 -0700369 .driver = {
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200370 .name = "lm75",
Shubhrajyoti Datta99145182010-08-14 21:08:50 +0200371 .pm = LM75_DEV_PM_OPS,
David Brownell01a52392008-04-21 12:10:53 -0700372 },
Jean Delvare8ff69ee2008-08-10 22:56:16 +0200373 .probe = lm75_probe,
374 .remove = lm75_remove,
375 .id_table = lm75_ids,
376 .detect = lm75_detect,
Jean Delvarec3813d62009-12-14 21:17:25 +0100377 .address_list = normal_i2c,
David Brownell01a52392008-04-21 12:10:53 -0700378};
379
380/*-----------------------------------------------------------------------*/
381
382/* register access */
383
Shubhrajyoti Dcaaa0f32010-10-28 20:31:44 +0200384/*
385 * All registers are word-sized, except for the configuration register.
386 * LM75 uses a high-byte first convention, which is exactly opposite to
387 * the SMBus standard.
388 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389static int lm75_read_value(struct i2c_client *client, u8 reg)
390{
391 if (reg == LM75_REG_CONF)
392 return i2c_smbus_read_byte_data(client, reg);
Jean Delvare90f41022011-11-04 12:00:47 +0100393 else
394 return i2c_smbus_read_word_swapped(client, reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395}
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value)
398{
399 if (reg == LM75_REG_CONF)
400 return i2c_smbus_write_byte_data(client, reg, value);
401 else
Jean Delvare90f41022011-11-04 12:00:47 +0100402 return i2c_smbus_write_word_swapped(client, reg, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
404
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405static struct lm75_data *lm75_update_device(struct device *dev)
406{
407 struct i2c_client *client = to_i2c_client(dev);
408 struct lm75_data *data = i2c_get_clientdata(client);
Frans Meulenbroeks1f962f32012-01-03 12:02:40 +0100409 struct lm75_data *ret = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100411 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
413 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
414 || !data->valid) {
Jean Delvare9ca8e40c82007-05-08 17:22:01 +0200415 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 dev_dbg(&client->dev, "Starting lm75 update\n");
417
David Brownellbcccc3a2008-05-03 19:19:16 -0700418 for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
419 int status;
420
421 status = lm75_read_value(client, LM75_REG_TEMP[i]);
Frans Meulenbroeks1f962f32012-01-03 12:02:40 +0100422 if (unlikely(status < 0)) {
423 dev_dbg(dev,
424 "LM75: Failed to read value: reg %d, error %d\n",
425 LM75_REG_TEMP[i], status);
426 ret = ERR_PTR(status);
427 data->valid = 0;
428 goto abort;
429 }
430 data->temp[i] = status;
David Brownellbcccc3a2008-05-03 19:19:16 -0700431 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 data->last_updated = jiffies;
433 data->valid = 1;
434 }
435
Frans Meulenbroeks1f962f32012-01-03 12:02:40 +0100436abort:
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100437 mutex_unlock(&data->update_lock);
Frans Meulenbroeks1f962f32012-01-03 12:02:40 +0100438 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439}
440
Axel Linf0967ee2012-01-20 15:38:18 +0800441module_i2c_driver(lm75_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
443MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>");
444MODULE_DESCRIPTION("LM75 driver");
445MODULE_LICENSE("GPL");