Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | adm1021.c - Part of lm_sensors, Linux kernel modules for hardware | |
c83c41e4 | 3 | monitoring |
1da177e4 LT |
4 | Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and |
5 | Philip Edelbrock <phil@netroedge.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/init.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/jiffies.h> | |
26 | #include <linux/i2c.h> | |
943b0830 | 27 | #include <linux/hwmon.h> |
a8d6646e | 28 | #include <linux/hwmon-sysfs.h> |
943b0830 | 29 | #include <linux/err.h> |
9a61bf63 | 30 | #include <linux/mutex.h> |
1da177e4 LT |
31 | |
32 | ||
33 | /* Addresses to scan */ | |
34 | static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, | |
35 | 0x29, 0x2a, 0x2b, | |
c83c41e4 | 36 | 0x4c, 0x4d, 0x4e, |
1da177e4 | 37 | I2C_CLIENT_END }; |
1da177e4 LT |
38 | |
39 | /* Insmod parameters */ | |
c83c41e4 KH |
40 | I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, |
41 | mc1066); | |
1da177e4 LT |
42 | |
43 | /* adm1021 constants specified below */ | |
44 | ||
45 | /* The adm1021 registers */ | |
46 | /* Read-only */ | |
a8d6646e KH |
47 | /* For nr in 0-1 */ |
48 | #define ADM1021_REG_TEMP(nr) (nr) | |
1da177e4 | 49 | #define ADM1021_REG_STATUS 0x02 |
c83c41e4 KH |
50 | /* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */ |
51 | #define ADM1021_REG_MAN_ID 0xFE | |
52 | /* ADM1021 = 0x0X, ADM1023 = 0x3X */ | |
53 | #define ADM1021_REG_DEV_ID 0xFF | |
1da177e4 LT |
54 | /* These use different addresses for reading/writing */ |
55 | #define ADM1021_REG_CONFIG_R 0x03 | |
56 | #define ADM1021_REG_CONFIG_W 0x09 | |
57 | #define ADM1021_REG_CONV_RATE_R 0x04 | |
58 | #define ADM1021_REG_CONV_RATE_W 0x0A | |
59 | /* These are for the ADM1023's additional precision on the remote temp sensor */ | |
c83c41e4 KH |
60 | #define ADM1023_REG_REM_TEMP_PREC 0x10 |
61 | #define ADM1023_REG_REM_OFFSET 0x11 | |
62 | #define ADM1023_REG_REM_OFFSET_PREC 0x12 | |
63 | #define ADM1023_REG_REM_TOS_PREC 0x13 | |
64 | #define ADM1023_REG_REM_THYST_PREC 0x14 | |
1da177e4 | 65 | /* limits */ |
a8d6646e KH |
66 | /* For nr in 0-1 */ |
67 | #define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr)) | |
68 | #define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr)) | |
69 | #define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr)) | |
70 | #define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr)) | |
1da177e4 LT |
71 | /* write-only */ |
72 | #define ADM1021_REG_ONESHOT 0x0F | |
73 | ||
1da177e4 LT |
74 | /* Initial values */ |
75 | ||
c83c41e4 KH |
76 | /* Note: Even though I left the low and high limits named os and hyst, |
77 | they don't quite work like a thermostat the way the LM75 does. I.e., | |
78 | a lower temp than THYST actually triggers an alarm instead of | |
1da177e4 LT |
79 | clearing it. Weird, ey? --Phil */ |
80 | ||
81 | /* Each client has this additional data */ | |
82 | struct adm1021_data { | |
83 | struct i2c_client client; | |
1beeffe4 | 84 | struct device *hwmon_dev; |
1da177e4 LT |
85 | enum chips type; |
86 | ||
9a61bf63 | 87 | struct mutex update_lock; |
1da177e4 LT |
88 | char valid; /* !=0 if following fields are valid */ |
89 | unsigned long last_updated; /* In jiffies */ | |
90 | ||
a8d6646e KH |
91 | s8 temp_max[2]; /* Register values */ |
92 | s8 temp_min[2]; | |
93 | s8 temp[2]; | |
94 | u8 alarms; | |
95 | /* Special values for ADM1023 only */ | |
96 | u8 remote_temp_prec; | |
97 | u8 remote_temp_os_prec; | |
98 | u8 remote_temp_hyst_prec; | |
99 | u8 remote_temp_offset; | |
100 | u8 remote_temp_offset_prec; | |
1da177e4 LT |
101 | }; |
102 | ||
103 | static int adm1021_attach_adapter(struct i2c_adapter *adapter); | |
104 | static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind); | |
105 | static void adm1021_init_client(struct i2c_client *client); | |
106 | static int adm1021_detach_client(struct i2c_client *client); | |
1da177e4 LT |
107 | static struct adm1021_data *adm1021_update_device(struct device *dev); |
108 | ||
109 | /* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */ | |
02002963 | 110 | static int read_only; |
1da177e4 LT |
111 | |
112 | ||
113 | /* This is the driver that will be inserted */ | |
114 | static struct i2c_driver adm1021_driver = { | |
cdaf7934 | 115 | .driver = { |
cdaf7934 LR |
116 | .name = "adm1021", |
117 | }, | |
1da177e4 | 118 | .id = I2C_DRIVERID_ADM1021, |
1da177e4 LT |
119 | .attach_adapter = adm1021_attach_adapter, |
120 | .detach_client = adm1021_detach_client, | |
121 | }; | |
122 | ||
a8d6646e KH |
123 | static ssize_t show_temp(struct device *dev, |
124 | struct device_attribute *devattr, char *buf) | |
125 | { | |
126 | int index = to_sensor_dev_attr(devattr)->index; | |
127 | struct adm1021_data *data = adm1021_update_device(dev); | |
128 | ||
129 | return sprintf(buf, "%d\n", 1000 * data->temp[index]); | |
130 | } | |
131 | ||
132 | static ssize_t show_temp_max(struct device *dev, | |
133 | struct device_attribute *devattr, char *buf) | |
134 | { | |
135 | int index = to_sensor_dev_attr(devattr)->index; | |
136 | struct adm1021_data *data = adm1021_update_device(dev); | |
137 | ||
138 | return sprintf(buf, "%d\n", 1000 * data->temp_max[index]); | |
139 | } | |
140 | ||
141 | static ssize_t show_temp_min(struct device *dev, | |
142 | struct device_attribute *devattr, char *buf) | |
143 | { | |
144 | int index = to_sensor_dev_attr(devattr)->index; | |
145 | struct adm1021_data *data = adm1021_update_device(dev); | |
146 | ||
147 | return sprintf(buf, "%d\n", 1000 * data->temp_min[index]); | |
1da177e4 | 148 | } |
1da177e4 | 149 | |
739ba248 KH |
150 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
151 | char *buf) | |
152 | { | |
153 | int index = to_sensor_dev_attr(attr)->index; | |
154 | struct adm1021_data *data = adm1021_update_device(dev); | |
155 | return sprintf(buf, "%u\n", (data->alarms >> index) & 1); | |
156 | } | |
157 | ||
c83c41e4 KH |
158 | static ssize_t show_alarms(struct device *dev, |
159 | struct device_attribute *attr, | |
160 | char *buf) | |
161 | { | |
162 | struct adm1021_data *data = adm1021_update_device(dev); | |
163 | return sprintf(buf, "%u\n", data->alarms); | |
1da177e4 | 164 | } |
c83c41e4 | 165 | |
a8d6646e KH |
166 | static ssize_t set_temp_max(struct device *dev, |
167 | struct device_attribute *devattr, | |
168 | const char *buf, size_t count) | |
169 | { | |
170 | int index = to_sensor_dev_attr(devattr)->index; | |
171 | struct i2c_client *client = to_i2c_client(dev); | |
172 | struct adm1021_data *data = i2c_get_clientdata(client); | |
173 | long temp = simple_strtol(buf, NULL, 10) / 1000; | |
174 | ||
175 | mutex_lock(&data->update_lock); | |
176 | data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127); | |
177 | if (!read_only) | |
178 | i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index), | |
179 | data->temp_max[index]); | |
180 | mutex_unlock(&data->update_lock); | |
181 | ||
182 | return count; | |
183 | } | |
184 | ||
185 | static ssize_t set_temp_min(struct device *dev, | |
186 | struct device_attribute *devattr, | |
187 | const char *buf, size_t count) | |
188 | { | |
189 | int index = to_sensor_dev_attr(devattr)->index; | |
190 | struct i2c_client *client = to_i2c_client(dev); | |
191 | struct adm1021_data *data = i2c_get_clientdata(client); | |
192 | long temp = simple_strtol(buf, NULL, 10) / 1000; | |
193 | ||
194 | mutex_lock(&data->update_lock); | |
195 | data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127); | |
196 | if (!read_only) | |
197 | i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index), | |
198 | data->temp_min[index]); | |
199 | mutex_unlock(&data->update_lock); | |
200 | ||
201 | return count; | |
1da177e4 | 202 | } |
1da177e4 | 203 | |
a8d6646e KH |
204 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); |
205 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, | |
206 | set_temp_max, 0); | |
207 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, | |
208 | set_temp_min, 0); | |
209 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
210 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, | |
211 | set_temp_max, 1); | |
212 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, | |
213 | set_temp_min, 1); | |
739ba248 KH |
214 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); |
215 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
216 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
217 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); | |
218 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); | |
219 | ||
a8d6646e | 220 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
1da177e4 LT |
221 | |
222 | static int adm1021_attach_adapter(struct i2c_adapter *adapter) | |
223 | { | |
224 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
225 | return 0; | |
2ed2dc3c | 226 | return i2c_probe(adapter, &addr_data, adm1021_detect); |
1da177e4 LT |
227 | } |
228 | ||
681c6f7a | 229 | static struct attribute *adm1021_attributes[] = { |
a8d6646e KH |
230 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
231 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
232 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
233 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
234 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
235 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
739ba248 KH |
236 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
237 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
238 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
239 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, | |
240 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
681c6f7a MH |
241 | &dev_attr_alarms.attr, |
242 | NULL | |
243 | }; | |
244 | ||
245 | static const struct attribute_group adm1021_group = { | |
246 | .attrs = adm1021_attributes, | |
247 | }; | |
248 | ||
1da177e4 LT |
249 | static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind) |
250 | { | |
251 | int i; | |
c83c41e4 | 252 | struct i2c_client *client; |
1da177e4 LT |
253 | struct adm1021_data *data; |
254 | int err = 0; | |
255 | const char *type_name = ""; | |
c83c41e4 | 256 | int conv_rate, status, config; |
1da177e4 | 257 | |
c83c41e4 KH |
258 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
259 | pr_debug("adm1021: detect failed, " | |
260 | "smbus byte data not supported!\n"); | |
1da177e4 | 261 | goto error0; |
c83c41e4 | 262 | } |
1da177e4 LT |
263 | |
264 | /* OK. For now, we presume we have a valid client. We now create the | |
265 | client structure, even though we cannot fill it completely yet. | |
c83c41e4 | 266 | But it allows us to access adm1021 register values. */ |
1da177e4 | 267 | |
ba9c2e8d | 268 | if (!(data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL))) { |
c83c41e4 | 269 | pr_debug("adm1021: detect failed, kzalloc failed!\n"); |
1da177e4 LT |
270 | err = -ENOMEM; |
271 | goto error0; | |
272 | } | |
1da177e4 | 273 | |
c83c41e4 KH |
274 | client = &data->client; |
275 | i2c_set_clientdata(client, data); | |
276 | client->addr = address; | |
277 | client->adapter = adapter; | |
278 | client->driver = &adm1021_driver; | |
279 | status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS); | |
280 | conv_rate = i2c_smbus_read_byte_data(client, | |
281 | ADM1021_REG_CONV_RATE_R); | |
282 | config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R); | |
1da177e4 LT |
283 | |
284 | /* Now, we do the remaining detection. */ | |
285 | if (kind < 0) { | |
c83c41e4 KH |
286 | if ((status & 0x03) != 0x00 || (config & 0x3F) != 0x00 |
287 | || (conv_rate & 0xF8) != 0x00) { | |
288 | pr_debug("adm1021: detect failed, " | |
289 | "chip not detected!\n"); | |
1da177e4 LT |
290 | err = -ENODEV; |
291 | goto error1; | |
292 | } | |
293 | } | |
294 | ||
295 | /* Determine the chip type. */ | |
296 | if (kind <= 0) { | |
c83c41e4 | 297 | i = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID); |
1da177e4 | 298 | if (i == 0x41) |
c83c41e4 KH |
299 | if ((i2c_smbus_read_byte_data(client, |
300 | ADM1021_REG_DEV_ID) & 0xF0) == 0x30) | |
1da177e4 LT |
301 | kind = adm1023; |
302 | else | |
303 | kind = adm1021; | |
304 | else if (i == 0x49) | |
305 | kind = thmc10; | |
306 | else if (i == 0x23) | |
307 | kind = gl523sm; | |
308 | else if ((i == 0x4d) && | |
c83c41e4 KH |
309 | (i2c_smbus_read_byte_data(client, |
310 | ADM1021_REG_DEV_ID) == 0x01)) | |
1da177e4 LT |
311 | kind = max1617a; |
312 | else if (i == 0x54) | |
313 | kind = mc1066; | |
314 | /* LM84 Mfr ID in a different place, and it has more unused bits */ | |
c83c41e4 KH |
315 | else if (conv_rate == 0x00 |
316 | && (kind == 0 /* skip extra detection */ | |
317 | || ((config & 0x7F) == 0x00 | |
318 | && (status & 0xAB) == 0x00))) | |
1da177e4 LT |
319 | kind = lm84; |
320 | else | |
321 | kind = max1617; | |
322 | } | |
323 | ||
324 | if (kind == max1617) { | |
325 | type_name = "max1617"; | |
326 | } else if (kind == max1617a) { | |
327 | type_name = "max1617a"; | |
328 | } else if (kind == adm1021) { | |
329 | type_name = "adm1021"; | |
330 | } else if (kind == adm1023) { | |
331 | type_name = "adm1023"; | |
332 | } else if (kind == thmc10) { | |
333 | type_name = "thmc10"; | |
334 | } else if (kind == lm84) { | |
335 | type_name = "lm84"; | |
336 | } else if (kind == gl523sm) { | |
337 | type_name = "gl523sm"; | |
338 | } else if (kind == mc1066) { | |
339 | type_name = "mc1066"; | |
340 | } | |
c83c41e4 KH |
341 | pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n", |
342 | type_name, i2c_adapter_id(adapter), address); | |
1da177e4 | 343 | |
c83c41e4 KH |
344 | /* Fill in the remaining client fields */ |
345 | strlcpy(client->name, type_name, I2C_NAME_SIZE); | |
1da177e4 | 346 | data->type = kind; |
9a61bf63 | 347 | mutex_init(&data->update_lock); |
1da177e4 LT |
348 | |
349 | /* Tell the I2C layer a new client has arrived */ | |
c83c41e4 | 350 | if ((err = i2c_attach_client(client))) |
1da177e4 LT |
351 | goto error1; |
352 | ||
353 | /* Initialize the ADM1021 chip */ | |
c83c41e4 KH |
354 | if (kind != lm84 && !read_only) |
355 | adm1021_init_client(client); | |
1da177e4 LT |
356 | |
357 | /* Register sysfs hooks */ | |
c83c41e4 | 358 | if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group))) |
681c6f7a MH |
359 | goto error2; |
360 | ||
1beeffe4 TJ |
361 | data->hwmon_dev = hwmon_device_register(&client->dev); |
362 | if (IS_ERR(data->hwmon_dev)) { | |
363 | err = PTR_ERR(data->hwmon_dev); | |
681c6f7a | 364 | goto error3; |
943b0830 MH |
365 | } |
366 | ||
1da177e4 LT |
367 | return 0; |
368 | ||
681c6f7a | 369 | error3: |
c83c41e4 | 370 | sysfs_remove_group(&client->dev.kobj, &adm1021_group); |
943b0830 | 371 | error2: |
c83c41e4 | 372 | i2c_detach_client(client); |
1da177e4 LT |
373 | error1: |
374 | kfree(data); | |
375 | error0: | |
376 | return err; | |
377 | } | |
378 | ||
379 | static void adm1021_init_client(struct i2c_client *client) | |
380 | { | |
381 | /* Enable ADC and disable suspend mode */ | |
c83c41e4 KH |
382 | i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W, |
383 | i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF); | |
1da177e4 | 384 | /* Set Conversion rate to 1/sec (this can be tinkered with) */ |
c83c41e4 | 385 | i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04); |
1da177e4 LT |
386 | } |
387 | ||
388 | static int adm1021_detach_client(struct i2c_client *client) | |
389 | { | |
943b0830 | 390 | struct adm1021_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
391 | int err; |
392 | ||
1beeffe4 | 393 | hwmon_device_unregister(data->hwmon_dev); |
681c6f7a | 394 | sysfs_remove_group(&client->dev.kobj, &adm1021_group); |
943b0830 | 395 | |
7bef5594 | 396 | if ((err = i2c_detach_client(client))) |
1da177e4 | 397 | return err; |
1da177e4 | 398 | |
943b0830 | 399 | kfree(data); |
1da177e4 LT |
400 | return 0; |
401 | } | |
402 | ||
1da177e4 LT |
403 | static struct adm1021_data *adm1021_update_device(struct device *dev) |
404 | { | |
405 | struct i2c_client *client = to_i2c_client(dev); | |
406 | struct adm1021_data *data = i2c_get_clientdata(client); | |
407 | ||
9a61bf63 | 408 | mutex_lock(&data->update_lock); |
1da177e4 LT |
409 | |
410 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
411 | || !data->valid) { | |
a8d6646e KH |
412 | int i; |
413 | ||
1da177e4 LT |
414 | dev_dbg(&client->dev, "Starting adm1021 update\n"); |
415 | ||
a8d6646e KH |
416 | for (i = 0; i < 2; i++) { |
417 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
418 | ADM1021_REG_TEMP(i)); | |
419 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
420 | ADM1021_REG_TOS_R(i)); | |
421 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
422 | ADM1021_REG_THYST_R(i)); | |
423 | } | |
c83c41e4 KH |
424 | data->alarms = i2c_smbus_read_byte_data(client, |
425 | ADM1021_REG_STATUS) & 0x7c; | |
1da177e4 | 426 | if (data->type == adm1023) { |
c83c41e4 KH |
427 | data->remote_temp_prec = |
428 | i2c_smbus_read_byte_data(client, | |
429 | ADM1023_REG_REM_TEMP_PREC); | |
430 | data->remote_temp_os_prec = | |
431 | i2c_smbus_read_byte_data(client, | |
432 | ADM1023_REG_REM_TOS_PREC); | |
433 | data->remote_temp_hyst_prec = | |
434 | i2c_smbus_read_byte_data(client, | |
435 | ADM1023_REG_REM_THYST_PREC); | |
436 | data->remote_temp_offset = | |
437 | i2c_smbus_read_byte_data(client, | |
438 | ADM1023_REG_REM_OFFSET); | |
439 | data->remote_temp_offset_prec = | |
440 | i2c_smbus_read_byte_data(client, | |
441 | ADM1023_REG_REM_OFFSET_PREC); | |
1da177e4 LT |
442 | } |
443 | data->last_updated = jiffies; | |
444 | data->valid = 1; | |
445 | } | |
446 | ||
9a61bf63 | 447 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
448 | |
449 | return data; | |
450 | } | |
451 | ||
452 | static int __init sensors_adm1021_init(void) | |
453 | { | |
454 | return i2c_add_driver(&adm1021_driver); | |
455 | } | |
456 | ||
457 | static void __exit sensors_adm1021_exit(void) | |
458 | { | |
459 | i2c_del_driver(&adm1021_driver); | |
460 | } | |
461 | ||
462 | MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and " | |
463 | "Philip Edelbrock <phil@netroedge.com>"); | |
464 | MODULE_DESCRIPTION("adm1021 driver"); | |
465 | MODULE_LICENSE("GPL"); | |
466 | ||
467 | module_param(read_only, bool, 0); | |
468 | MODULE_PARM_DESC(read_only, "Don't set any values, read only mode"); | |
469 | ||
470 | module_init(sensors_adm1021_init) | |
471 | module_exit(sensors_adm1021_exit) |