blob: 2282d77e83e8ee117a6ffc4baeea24b8d3580498 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * lm92 - Hardware monitoring driver
Jean Delvare910e8dc2008-07-16 19:30:15 +02003 * Copyright (C) 2005-2008 Jean Delvare <khali@linux-fr.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * Based on the lm90 driver, with some ideas taken from the lm_sensors
6 * lm92 driver as well.
7 *
8 * The LM92 is a sensor chip made by National Semiconductor. It reports
9 * its own temperature with a 0.0625 deg resolution and a 0.33 deg
10 * accuracy. Complete datasheet can be obtained from National's website
11 * at:
12 * http://www.national.com/pf/LM/LM92.html
13 *
14 * This driver also supports the MAX6635 sensor chip made by Maxim.
15 * This chip is compatible with the LM92, but has a lesser accuracy
16 * (1.0 deg). Complete datasheet can be obtained from Maxim's website
17 * at:
18 * http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3074
19 *
20 * Since the LM92 was the first chipset supported by this driver, most
21 * comments will refer to this chipset, but are actually general and
22 * concern all supported chipsets, unless mentioned otherwise.
23 *
24 * Support could easily be added for the National Semiconductor LM76
25 * and Maxim MAX6633 and MAX6634 chips, which are mostly compatible
26 * with the LM92.
27 *
28 * This program is free software; you can redistribute it and/or modify
29 * it under the terms of the GNU General Public License as published by
30 * the Free Software Foundation; either version 2 of the License, or
31 * (at your option) any later version.
32 *
33 * This program is distributed in the hope that it will be useful,
34 * but WITHOUT ANY WARRANTY; without even the implied warranty of
35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
36 * GNU General Public License for more details.
37 *
38 * You should have received a copy of the GNU General Public License
39 * along with this program; if not, write to the Free Software
40 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
41 */
42
43#include <linux/module.h>
44#include <linux/init.h>
45#include <linux/slab.h>
46#include <linux/i2c.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040047#include <linux/hwmon.h>
Jean Delvare6cb59e92008-01-06 15:25:52 +010048#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040049#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010050#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Guenter Roecka318afd2012-01-14 21:04:18 -080052/*
53 * The LM92 and MAX6635 have 2 two-state pins for address selection,
54 * resulting in 4 possible addresses.
55 */
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050056static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b,
57 I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/* The LM92 registers */
60#define LM92_REG_CONFIG 0x01 /* 8-bit, RW */
61#define LM92_REG_TEMP 0x00 /* 16-bit, RO */
62#define LM92_REG_TEMP_HYST 0x02 /* 16-bit, RW */
63#define LM92_REG_TEMP_CRIT 0x03 /* 16-bit, RW */
64#define LM92_REG_TEMP_LOW 0x04 /* 16-bit, RW */
65#define LM92_REG_TEMP_HIGH 0x05 /* 16-bit, RW */
66#define LM92_REG_MAN_ID 0x07 /* 16-bit, RO, LM92 only */
67
Guenter Roecka318afd2012-01-14 21:04:18 -080068/*
69 * The LM92 uses signed 13-bit values with LSB = 0.0625 degree Celsius,
70 * left-justified in 16-bit registers. No rounding is done, with such
71 * a resolution it's just not worth it. Note that the MAX6635 doesn't
72 * make use of the 4 lower bits for limits (i.e. effective resolution
73 * for limits is 1 degree Celsius).
74 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070075static inline int TEMP_FROM_REG(s16 reg)
76{
77 return reg / 8 * 625 / 10;
78}
79
80static inline s16 TEMP_TO_REG(int val)
81{
82 if (val <= -60000)
83 return -60000 * 10 / 625 * 8;
84 if (val >= 160000)
85 return 160000 * 10 / 625 * 8;
86 return val * 10 / 625 * 8;
87}
88
89/* Alarm flags are stored in the 3 LSB of the temperature register */
90static inline u8 ALARMS_FROM_REG(s16 reg)
91{
92 return reg & 0x0007;
93}
94
95/* Driver data (common to all clients) */
96static struct i2c_driver lm92_driver;
97
98/* Client data (each client gets its own) */
99struct lm92_data {
Tony Jones1beeffe2007-08-20 13:46:20 -0700100 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100101 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 char valid; /* zero until following fields are valid */
103 unsigned long last_updated; /* in jiffies */
104
105 /* registers values */
106 s16 temp1_input, temp1_crit, temp1_min, temp1_max, temp1_hyst;
107};
108
109
110/*
111 * Sysfs attributes and callback functions
112 */
113
114static struct lm92_data *lm92_update_device(struct device *dev)
115{
116 struct i2c_client *client = to_i2c_client(dev);
117 struct lm92_data *data = i2c_get_clientdata(client);
118
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100119 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121 if (time_after(jiffies, data->last_updated + HZ)
122 || !data->valid) {
123 dev_dbg(&client->dev, "Updating lm92 data\n");
Jean Delvare90f41022011-11-04 12:00:47 +0100124 data->temp1_input = i2c_smbus_read_word_swapped(client,
125 LM92_REG_TEMP);
126 data->temp1_hyst = i2c_smbus_read_word_swapped(client,
127 LM92_REG_TEMP_HYST);
128 data->temp1_crit = i2c_smbus_read_word_swapped(client,
129 LM92_REG_TEMP_CRIT);
130 data->temp1_min = i2c_smbus_read_word_swapped(client,
131 LM92_REG_TEMP_LOW);
132 data->temp1_max = i2c_smbus_read_word_swapped(client,
133 LM92_REG_TEMP_HIGH);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135 data->last_updated = jiffies;
136 data->valid = 1;
137 }
138
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100139 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
141 return data;
142}
143
144#define show_temp(value) \
Guenter Roecka318afd2012-01-14 21:04:18 -0800145static ssize_t show_##value(struct device *dev, struct device_attribute *attr, \
146 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{ \
148 struct lm92_data *data = lm92_update_device(dev); \
149 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \
150}
151show_temp(temp1_input);
152show_temp(temp1_crit);
153show_temp(temp1_min);
154show_temp(temp1_max);
155
156#define set_temp(value, reg) \
Guenter Roecka318afd2012-01-14 21:04:18 -0800157static ssize_t set_##value(struct device *dev, struct device_attribute *attr, \
158 const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 size_t count) \
160{ \
161 struct i2c_client *client = to_i2c_client(dev); \
162 struct lm92_data *data = i2c_get_clientdata(client); \
Guenter Roecka318afd2012-01-14 21:04:18 -0800163 long val; \
164 int err = kstrtol(buf, 10, &val); \
165 if (err) \
166 return err; \
167\
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100168 mutex_lock(&data->update_lock); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 data->value = TEMP_TO_REG(val); \
Jean Delvare90f41022011-11-04 12:00:47 +0100170 i2c_smbus_write_word_swapped(client, reg, data->value); \
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100171 mutex_unlock(&data->update_lock); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 return count; \
173}
174set_temp(temp1_crit, LM92_REG_TEMP_CRIT);
175set_temp(temp1_min, LM92_REG_TEMP_LOW);
176set_temp(temp1_max, LM92_REG_TEMP_HIGH);
177
Guenter Roecka318afd2012-01-14 21:04:18 -0800178static ssize_t show_temp1_crit_hyst(struct device *dev,
179 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180{
181 struct lm92_data *data = lm92_update_device(dev);
182 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp1_crit)
183 - TEMP_FROM_REG(data->temp1_hyst));
184}
Guenter Roecka318afd2012-01-14 21:04:18 -0800185static ssize_t show_temp1_max_hyst(struct device *dev,
186 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
188 struct lm92_data *data = lm92_update_device(dev);
189 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp1_max)
190 - TEMP_FROM_REG(data->temp1_hyst));
191}
Guenter Roecka318afd2012-01-14 21:04:18 -0800192static ssize_t show_temp1_min_hyst(struct device *dev,
193 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
195 struct lm92_data *data = lm92_update_device(dev);
196 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp1_min)
197 + TEMP_FROM_REG(data->temp1_hyst));
198}
199
Guenter Roecka318afd2012-01-14 21:04:18 -0800200static ssize_t set_temp1_crit_hyst(struct device *dev,
201 struct device_attribute *attr,
202 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
204 struct i2c_client *client = to_i2c_client(dev);
205 struct lm92_data *data = i2c_get_clientdata(client);
Guenter Roecka318afd2012-01-14 21:04:18 -0800206 long val;
207 int err;
208
209 err = kstrtol(buf, 10, &val);
210 if (err)
211 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100213 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 data->temp1_hyst = TEMP_FROM_REG(data->temp1_crit) - val;
Jean Delvare90f41022011-11-04 12:00:47 +0100215 i2c_smbus_write_word_swapped(client, LM92_REG_TEMP_HYST,
216 TEMP_TO_REG(data->temp1_hyst));
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100217 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 return count;
219}
220
Guenter Roecka318afd2012-01-14 21:04:18 -0800221static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
222 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223{
224 struct lm92_data *data = lm92_update_device(dev);
225 return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->temp1_input));
226}
227
Jean Delvare6cb59e92008-01-06 15:25:52 +0100228static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
229 char *buf)
230{
231 int bitnr = to_sensor_dev_attr(attr)->index;
232 struct lm92_data *data = lm92_update_device(dev);
233 return sprintf(buf, "%d\n", (data->temp1_input >> bitnr) & 1);
234}
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp1_input, NULL);
237static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp1_crit,
238 set_temp1_crit);
239static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp1_crit_hyst,
240 set_temp1_crit_hyst);
241static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp1_min,
242 set_temp1_min);
243static DEVICE_ATTR(temp1_min_hyst, S_IRUGO, show_temp1_min_hyst, NULL);
244static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp1_max,
245 set_temp1_max);
246static DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_temp1_max_hyst, NULL);
247static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
Jean Delvare6cb59e92008-01-06 15:25:52 +0100248static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 2);
249static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
250static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252
253/*
254 * Detection and registration
255 */
256
257static void lm92_init_client(struct i2c_client *client)
258{
259 u8 config;
260
261 /* Start the conversions if needed */
262 config = i2c_smbus_read_byte_data(client, LM92_REG_CONFIG);
263 if (config & 0x01)
264 i2c_smbus_write_byte_data(client, LM92_REG_CONFIG,
265 config & 0xFE);
266}
267
Guenter Roecka318afd2012-01-14 21:04:18 -0800268/*
269 * The MAX6635 has no identification register, so we have to use tricks
270 * to identify it reliably. This is somewhat slow.
271 * Note that we do NOT rely on the 2 MSB of the configuration register
272 * always reading 0, as suggested by the datasheet, because it was once
273 * reported not to be true.
274 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275static int max6635_check(struct i2c_client *client)
276{
277 u16 temp_low, temp_high, temp_hyst, temp_crit;
278 u8 conf;
279 int i;
280
Guenter Roecka318afd2012-01-14 21:04:18 -0800281 /*
282 * No manufacturer ID register, so a read from this address will
283 * always return the last read value.
284 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 temp_low = i2c_smbus_read_word_data(client, LM92_REG_TEMP_LOW);
286 if (i2c_smbus_read_word_data(client, LM92_REG_MAN_ID) != temp_low)
287 return 0;
288 temp_high = i2c_smbus_read_word_data(client, LM92_REG_TEMP_HIGH);
289 if (i2c_smbus_read_word_data(client, LM92_REG_MAN_ID) != temp_high)
290 return 0;
Guenter Roecka318afd2012-01-14 21:04:18 -0800291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 /* Limits are stored as integer values (signed, 9-bit). */
293 if ((temp_low & 0x7f00) || (temp_high & 0x7f00))
294 return 0;
295 temp_hyst = i2c_smbus_read_word_data(client, LM92_REG_TEMP_HYST);
296 temp_crit = i2c_smbus_read_word_data(client, LM92_REG_TEMP_CRIT);
297 if ((temp_hyst & 0x7f00) || (temp_crit & 0x7f00))
298 return 0;
299
Guenter Roecka318afd2012-01-14 21:04:18 -0800300 /*
301 * Registers addresses were found to cycle over 16-byte boundaries.
302 * We don't test all registers with all offsets so as to save some
303 * reads and time, but this should still be sufficient to dismiss
304 * non-MAX6635 chips.
305 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 conf = i2c_smbus_read_byte_data(client, LM92_REG_CONFIG);
Guenter Roecka318afd2012-01-14 21:04:18 -0800307 for (i = 16; i < 96; i *= 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 if (temp_hyst != i2c_smbus_read_word_data(client,
Guenter Roecka318afd2012-01-14 21:04:18 -0800309 LM92_REG_TEMP_HYST + i - 16)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 || temp_crit != i2c_smbus_read_word_data(client,
Guenter Roecka318afd2012-01-14 21:04:18 -0800311 LM92_REG_TEMP_CRIT + i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 || temp_low != i2c_smbus_read_word_data(client,
313 LM92_REG_TEMP_LOW + i + 16)
314 || temp_high != i2c_smbus_read_word_data(client,
Guenter Roecka318afd2012-01-14 21:04:18 -0800315 LM92_REG_TEMP_HIGH + i + 32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 || conf != i2c_smbus_read_byte_data(client,
Guenter Roecka318afd2012-01-14 21:04:18 -0800317 LM92_REG_CONFIG + i))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 return 0;
319 }
320
321 return 1;
322}
323
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200324static struct attribute *lm92_attributes[] = {
325 &dev_attr_temp1_input.attr,
326 &dev_attr_temp1_crit.attr,
327 &dev_attr_temp1_crit_hyst.attr,
328 &dev_attr_temp1_min.attr,
329 &dev_attr_temp1_min_hyst.attr,
330 &dev_attr_temp1_max.attr,
331 &dev_attr_temp1_max_hyst.attr,
332 &dev_attr_alarms.attr,
Jean Delvare6cb59e92008-01-06 15:25:52 +0100333 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
334 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
335 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200336 NULL
337};
338
339static const struct attribute_group lm92_group = {
340 .attrs = lm92_attributes,
341};
342
Jean Delvare910e8dc2008-07-16 19:30:15 +0200343/* Return 0 if detection is successful, -ENODEV otherwise */
Jean Delvare310ec792009-12-14 21:17:23 +0100344static int lm92_detect(struct i2c_client *new_client,
Jean Delvare910e8dc2008-07-16 19:30:15 +0200345 struct i2c_board_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346{
Jean Delvare910e8dc2008-07-16 19:30:15 +0200347 struct i2c_adapter *adapter = new_client->adapter;
Jean Delvare52df6442009-12-09 20:35:57 +0100348 u8 config;
349 u16 man_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
351 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
352 | I2C_FUNC_SMBUS_WORD_DATA))
Jean Delvare910e8dc2008-07-16 19:30:15 +0200353 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Jean Delvare52df6442009-12-09 20:35:57 +0100355 config = i2c_smbus_read_byte_data(new_client, LM92_REG_CONFIG);
356 man_id = i2c_smbus_read_word_data(new_client, LM92_REG_MAN_ID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Jean Delvare52df6442009-12-09 20:35:57 +0100358 if ((config & 0xe0) == 0x00 && man_id == 0x0180)
359 pr_info("lm92: Found National Semiconductor LM92 chip\n");
360 else if (max6635_check(new_client))
361 pr_info("lm92: Found Maxim MAX6635 chip\n");
362 else
363 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Jean Delvare910e8dc2008-07-16 19:30:15 +0200365 strlcpy(info->type, "lm92", I2C_NAME_SIZE);
366
367 return 0;
368}
369
370static int lm92_probe(struct i2c_client *new_client,
371 const struct i2c_device_id *id)
372{
373 struct lm92_data *data;
374 int err;
375
Guenter Roeck705375c2012-06-02 09:58:11 -0700376 data = devm_kzalloc(&new_client->dev, sizeof(struct lm92_data),
377 GFP_KERNEL);
378 if (!data)
379 return -ENOMEM;
Jean Delvare910e8dc2008-07-16 19:30:15 +0200380
381 i2c_set_clientdata(new_client, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 data->valid = 0;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100383 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 /* Initialize the chipset */
386 lm92_init_client(new_client);
387
388 /* Register sysfs hooks */
Guenter Roecka318afd2012-01-14 21:04:18 -0800389 err = sysfs_create_group(&new_client->dev.kobj, &lm92_group);
390 if (err)
Guenter Roeck705375c2012-06-02 09:58:11 -0700391 return err;
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200392
Tony Jones1beeffe2007-08-20 13:46:20 -0700393 data->hwmon_dev = hwmon_device_register(&new_client->dev);
394 if (IS_ERR(data->hwmon_dev)) {
395 err = PTR_ERR(data->hwmon_dev);
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200396 goto exit_remove;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400397 }
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 return 0;
400
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200401exit_remove:
402 sysfs_remove_group(&new_client->dev.kobj, &lm92_group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 return err;
404}
405
Jean Delvare910e8dc2008-07-16 19:30:15 +0200406static int lm92_remove(struct i2c_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400408 struct lm92_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Tony Jones1beeffe2007-08-20 13:46:20 -0700410 hwmon_device_unregister(data->hwmon_dev);
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200411 sysfs_remove_group(&client->dev.kobj, &lm92_group);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 return 0;
414}
415
416
417/*
418 * Module and driver stuff
419 */
420
Jean Delvare910e8dc2008-07-16 19:30:15 +0200421static const struct i2c_device_id lm92_id[] = {
Jean Delvare1f86df42009-12-14 21:17:26 +0100422 { "lm92", 0 },
Jean Delvare910e8dc2008-07-16 19:30:15 +0200423 /* max6635 could be added here */
424 { }
425};
426MODULE_DEVICE_TABLE(i2c, lm92_id);
427
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428static struct i2c_driver lm92_driver = {
Jean Delvare910e8dc2008-07-16 19:30:15 +0200429 .class = I2C_CLASS_HWMON,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100430 .driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100431 .name = "lm92",
432 },
Jean Delvare910e8dc2008-07-16 19:30:15 +0200433 .probe = lm92_probe,
434 .remove = lm92_remove,
435 .id_table = lm92_id,
436 .detect = lm92_detect,
Jean Delvarec3813d62009-12-14 21:17:25 +0100437 .address_list = normal_i2c,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438};
439
Axel Linf0967ee2012-01-20 15:38:18 +0800440module_i2c_driver(lm92_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
443MODULE_DESCRIPTION("LM92/MAX6635 driver");
444MODULE_LICENSE("GPL");