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1da177e4 LT |
1 | /* |
2 | lm78.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | monitoring | |
4 | Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
c40769fe | 5 | Copyright (c) 2007 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
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> | |
c40769fe JD |
27 | #include <linux/platform_device.h> |
28 | #include <linux/ioport.h> | |
943b0830 | 29 | #include <linux/hwmon.h> |
19f673ed | 30 | #include <linux/hwmon-vid.h> |
943b0830 | 31 | #include <linux/err.h> |
9a61bf63 | 32 | #include <linux/mutex.h> |
1da177e4 LT |
33 | #include <asm/io.h> |
34 | ||
c40769fe JD |
35 | /* ISA device, if found */ |
36 | static struct platform_device *pdev; | |
37 | ||
1da177e4 LT |
38 | /* Addresses to scan */ |
39 | static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24, | |
40 | 0x25, 0x26, 0x27, 0x28, 0x29, | |
41 | 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, | |
42 | 0x2f, I2C_CLIENT_END }; | |
2d8672c5 | 43 | static unsigned short isa_address = 0x290; |
1da177e4 LT |
44 | |
45 | /* Insmod parameters */ | |
f4b50261 | 46 | I2C_CLIENT_INSMOD_2(lm78, lm79); |
1da177e4 LT |
47 | |
48 | /* Many LM78 constants specified below */ | |
49 | ||
50 | /* Length of ISA address segment */ | |
51 | #define LM78_EXTENT 8 | |
52 | ||
53 | /* Where are the ISA address/data registers relative to the base address */ | |
54 | #define LM78_ADDR_REG_OFFSET 5 | |
55 | #define LM78_DATA_REG_OFFSET 6 | |
56 | ||
57 | /* The LM78 registers */ | |
58 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
59 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
60 | #define LM78_REG_IN(nr) (0x20 + (nr)) | |
61 | ||
62 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) | |
63 | #define LM78_REG_FAN(nr) (0x28 + (nr)) | |
64 | ||
65 | #define LM78_REG_TEMP 0x27 | |
66 | #define LM78_REG_TEMP_OVER 0x39 | |
67 | #define LM78_REG_TEMP_HYST 0x3a | |
68 | ||
69 | #define LM78_REG_ALARM1 0x41 | |
70 | #define LM78_REG_ALARM2 0x42 | |
71 | ||
72 | #define LM78_REG_VID_FANDIV 0x47 | |
73 | ||
74 | #define LM78_REG_CONFIG 0x40 | |
75 | #define LM78_REG_CHIPID 0x49 | |
76 | #define LM78_REG_I2C_ADDR 0x48 | |
77 | ||
78 | ||
79 | /* Conversions. Rounding and limit checking is only done on the TO_REG | |
80 | variants. */ | |
81 | ||
82 | /* IN: mV, (0V to 4.08V) | |
83 | REG: 16mV/bit */ | |
84 | static inline u8 IN_TO_REG(unsigned long val) | |
85 | { | |
86 | unsigned long nval = SENSORS_LIMIT(val, 0, 4080); | |
87 | return (nval + 8) / 16; | |
88 | } | |
89 | #define IN_FROM_REG(val) ((val) * 16) | |
90 | ||
91 | static inline u8 FAN_TO_REG(long rpm, int div) | |
92 | { | |
93 | if (rpm <= 0) | |
94 | return 255; | |
95 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
96 | } | |
97 | ||
98 | static inline int FAN_FROM_REG(u8 val, int div) | |
99 | { | |
100 | return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); | |
101 | } | |
102 | ||
103 | /* TEMP: mC (-128C to +127C) | |
104 | REG: 1C/bit, two's complement */ | |
105 | static inline s8 TEMP_TO_REG(int val) | |
106 | { | |
107 | int nval = SENSORS_LIMIT(val, -128000, 127000) ; | |
108 | return nval<0 ? (nval-500)/1000 : (nval+500)/1000; | |
109 | } | |
110 | ||
111 | static inline int TEMP_FROM_REG(s8 val) | |
112 | { | |
113 | return val * 1000; | |
114 | } | |
115 | ||
1da177e4 LT |
116 | #define DIV_FROM_REG(val) (1 << (val)) |
117 | ||
118 | /* There are some complications in a module like this. First off, LM78 chips | |
119 | may be both present on the SMBus and the ISA bus, and we have to handle | |
120 | those cases separately at some places. Second, there might be several | |
121 | LM78 chips available (well, actually, that is probably never done; but | |
122 | it is a clean illustration of how to handle a case like that). Finally, | |
123 | a specific chip may be attached to *both* ISA and SMBus, and we would | |
124 | not like to detect it double. Fortunately, in the case of the LM78 at | |
125 | least, a register tells us what SMBus address we are on, so that helps | |
126 | a bit - except if there could be more than one SMBus. Groan. No solution | |
127 | for this yet. */ | |
128 | ||
c40769fe JD |
129 | /* For ISA chips, we abuse the i2c_client addr and name fields. We also use |
130 | the driver field to differentiate between I2C and ISA chips. */ | |
1da177e4 LT |
131 | struct lm78_data { |
132 | struct i2c_client client; | |
943b0830 | 133 | struct class_device *class_dev; |
9a61bf63 | 134 | struct mutex lock; |
1da177e4 LT |
135 | enum chips type; |
136 | ||
9a61bf63 | 137 | struct mutex update_lock; |
1da177e4 LT |
138 | char valid; /* !=0 if following fields are valid */ |
139 | unsigned long last_updated; /* In jiffies */ | |
140 | ||
141 | u8 in[7]; /* Register value */ | |
142 | u8 in_max[7]; /* Register value */ | |
143 | u8 in_min[7]; /* Register value */ | |
144 | u8 fan[3]; /* Register value */ | |
145 | u8 fan_min[3]; /* Register value */ | |
146 | s8 temp; /* Register value */ | |
147 | s8 temp_over; /* Register value */ | |
148 | s8 temp_hyst; /* Register value */ | |
149 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
150 | u8 vid; /* Register encoding, combined */ | |
151 | u16 alarms; /* Register encoding, combined */ | |
152 | }; | |
153 | ||
154 | ||
155 | static int lm78_attach_adapter(struct i2c_adapter *adapter); | |
156 | static int lm78_detect(struct i2c_adapter *adapter, int address, int kind); | |
157 | static int lm78_detach_client(struct i2c_client *client); | |
158 | ||
c40769fe JD |
159 | static int __devinit lm78_isa_probe(struct platform_device *pdev); |
160 | static int __devexit lm78_isa_remove(struct platform_device *pdev); | |
161 | ||
f6c27fc1 DJ |
162 | static int lm78_read_value(struct i2c_client *client, u8 reg); |
163 | static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value); | |
1da177e4 LT |
164 | static struct lm78_data *lm78_update_device(struct device *dev); |
165 | static void lm78_init_client(struct i2c_client *client); | |
166 | ||
167 | ||
168 | static struct i2c_driver lm78_driver = { | |
cdaf7934 | 169 | .driver = { |
cdaf7934 LR |
170 | .name = "lm78", |
171 | }, | |
1da177e4 | 172 | .id = I2C_DRIVERID_LM78, |
1da177e4 LT |
173 | .attach_adapter = lm78_attach_adapter, |
174 | .detach_client = lm78_detach_client, | |
175 | }; | |
176 | ||
c40769fe | 177 | static struct platform_driver lm78_isa_driver = { |
cdaf7934 | 178 | .driver = { |
87218842 | 179 | .owner = THIS_MODULE, |
c40769fe | 180 | .name = "lm78", |
cdaf7934 | 181 | }, |
c40769fe JD |
182 | .probe = lm78_isa_probe, |
183 | .remove = lm78_isa_remove, | |
fde09509 JD |
184 | }; |
185 | ||
186 | ||
1da177e4 LT |
187 | /* 7 Voltages */ |
188 | static ssize_t show_in(struct device *dev, char *buf, int nr) | |
189 | { | |
190 | struct lm78_data *data = lm78_update_device(dev); | |
191 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); | |
192 | } | |
193 | ||
194 | static ssize_t show_in_min(struct device *dev, char *buf, int nr) | |
195 | { | |
196 | struct lm78_data *data = lm78_update_device(dev); | |
197 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); | |
198 | } | |
199 | ||
200 | static ssize_t show_in_max(struct device *dev, char *buf, int nr) | |
201 | { | |
202 | struct lm78_data *data = lm78_update_device(dev); | |
203 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); | |
204 | } | |
205 | ||
206 | static ssize_t set_in_min(struct device *dev, const char *buf, | |
207 | size_t count, int nr) | |
208 | { | |
c40769fe JD |
209 | struct lm78_data *data = dev_get_drvdata(dev); |
210 | struct i2c_client *client = &data->client; | |
1da177e4 LT |
211 | unsigned long val = simple_strtoul(buf, NULL, 10); |
212 | ||
9a61bf63 | 213 | mutex_lock(&data->update_lock); |
1da177e4 LT |
214 | data->in_min[nr] = IN_TO_REG(val); |
215 | lm78_write_value(client, LM78_REG_IN_MIN(nr), data->in_min[nr]); | |
9a61bf63 | 216 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
217 | return count; |
218 | } | |
219 | ||
220 | static ssize_t set_in_max(struct device *dev, const char *buf, | |
221 | size_t count, int nr) | |
222 | { | |
c40769fe JD |
223 | struct lm78_data *data = dev_get_drvdata(dev); |
224 | struct i2c_client *client = &data->client; | |
1da177e4 LT |
225 | unsigned long val = simple_strtoul(buf, NULL, 10); |
226 | ||
9a61bf63 | 227 | mutex_lock(&data->update_lock); |
1da177e4 LT |
228 | data->in_max[nr] = IN_TO_REG(val); |
229 | lm78_write_value(client, LM78_REG_IN_MAX(nr), data->in_max[nr]); | |
9a61bf63 | 230 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
231 | return count; |
232 | } | |
233 | ||
234 | #define show_in_offset(offset) \ | |
235 | static ssize_t \ | |
8627f9ba | 236 | show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
237 | { \ |
238 | return show_in(dev, buf, offset); \ | |
239 | } \ | |
240 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ | |
241 | show_in##offset, NULL); \ | |
242 | static ssize_t \ | |
8627f9ba | 243 | show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
244 | { \ |
245 | return show_in_min(dev, buf, offset); \ | |
246 | } \ | |
247 | static ssize_t \ | |
8627f9ba | 248 | show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
249 | { \ |
250 | return show_in_max(dev, buf, offset); \ | |
251 | } \ | |
8627f9ba | 252 | static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
253 | const char *buf, size_t count) \ |
254 | { \ | |
255 | return set_in_min(dev, buf, count, offset); \ | |
256 | } \ | |
8627f9ba | 257 | static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
258 | const char *buf, size_t count) \ |
259 | { \ | |
260 | return set_in_max(dev, buf, count, offset); \ | |
261 | } \ | |
262 | static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
263 | show_in##offset##_min, set_in##offset##_min); \ | |
264 | static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
265 | show_in##offset##_max, set_in##offset##_max); | |
266 | ||
267 | show_in_offset(0); | |
268 | show_in_offset(1); | |
269 | show_in_offset(2); | |
270 | show_in_offset(3); | |
271 | show_in_offset(4); | |
272 | show_in_offset(5); | |
273 | show_in_offset(6); | |
274 | ||
275 | /* Temperature */ | |
8627f9ba | 276 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
277 | { |
278 | struct lm78_data *data = lm78_update_device(dev); | |
279 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
280 | } | |
281 | ||
8627f9ba | 282 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
283 | { |
284 | struct lm78_data *data = lm78_update_device(dev); | |
285 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
286 | } | |
287 | ||
8627f9ba | 288 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 | 289 | { |
c40769fe JD |
290 | struct lm78_data *data = dev_get_drvdata(dev); |
291 | struct i2c_client *client = &data->client; | |
1da177e4 LT |
292 | long val = simple_strtol(buf, NULL, 10); |
293 | ||
9a61bf63 | 294 | mutex_lock(&data->update_lock); |
1da177e4 LT |
295 | data->temp_over = TEMP_TO_REG(val); |
296 | lm78_write_value(client, LM78_REG_TEMP_OVER, data->temp_over); | |
9a61bf63 | 297 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
298 | return count; |
299 | } | |
300 | ||
8627f9ba | 301 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
302 | { |
303 | struct lm78_data *data = lm78_update_device(dev); | |
304 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
305 | } | |
306 | ||
8627f9ba | 307 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 | 308 | { |
c40769fe JD |
309 | struct lm78_data *data = dev_get_drvdata(dev); |
310 | struct i2c_client *client = &data->client; | |
1da177e4 LT |
311 | long val = simple_strtol(buf, NULL, 10); |
312 | ||
9a61bf63 | 313 | mutex_lock(&data->update_lock); |
1da177e4 LT |
314 | data->temp_hyst = TEMP_TO_REG(val); |
315 | lm78_write_value(client, LM78_REG_TEMP_HYST, data->temp_hyst); | |
9a61bf63 | 316 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
317 | return count; |
318 | } | |
319 | ||
320 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
321 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, | |
322 | show_temp_over, set_temp_over); | |
323 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
324 | show_temp_hyst, set_temp_hyst); | |
325 | ||
326 | /* 3 Fans */ | |
327 | static ssize_t show_fan(struct device *dev, char *buf, int nr) | |
328 | { | |
329 | struct lm78_data *data = lm78_update_device(dev); | |
330 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], | |
331 | DIV_FROM_REG(data->fan_div[nr])) ); | |
332 | } | |
333 | ||
334 | static ssize_t show_fan_min(struct device *dev, char *buf, int nr) | |
335 | { | |
336 | struct lm78_data *data = lm78_update_device(dev); | |
337 | return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr], | |
338 | DIV_FROM_REG(data->fan_div[nr])) ); | |
339 | } | |
340 | ||
341 | static ssize_t set_fan_min(struct device *dev, const char *buf, | |
342 | size_t count, int nr) | |
343 | { | |
c40769fe JD |
344 | struct lm78_data *data = dev_get_drvdata(dev); |
345 | struct i2c_client *client = &data->client; | |
1da177e4 LT |
346 | unsigned long val = simple_strtoul(buf, NULL, 10); |
347 | ||
9a61bf63 | 348 | mutex_lock(&data->update_lock); |
1da177e4 LT |
349 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
350 | lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); | |
9a61bf63 | 351 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
352 | return count; |
353 | } | |
354 | ||
355 | static ssize_t show_fan_div(struct device *dev, char *buf, int nr) | |
356 | { | |
357 | struct lm78_data *data = lm78_update_device(dev); | |
358 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); | |
359 | } | |
360 | ||
361 | /* Note: we save and restore the fan minimum here, because its value is | |
362 | determined in part by the fan divisor. This follows the principle of | |
d6e05edc | 363 | least surprise; the user doesn't expect the fan minimum to change just |
1da177e4 LT |
364 | because the divisor changed. */ |
365 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
366 | size_t count, int nr) | |
367 | { | |
c40769fe JD |
368 | struct lm78_data *data = dev_get_drvdata(dev); |
369 | struct i2c_client *client = &data->client; | |
1da177e4 LT |
370 | unsigned long val = simple_strtoul(buf, NULL, 10); |
371 | unsigned long min; | |
372 | u8 reg; | |
373 | ||
9a61bf63 | 374 | mutex_lock(&data->update_lock); |
1da177e4 LT |
375 | min = FAN_FROM_REG(data->fan_min[nr], |
376 | DIV_FROM_REG(data->fan_div[nr])); | |
377 | ||
378 | switch (val) { | |
379 | case 1: data->fan_div[nr] = 0; break; | |
380 | case 2: data->fan_div[nr] = 1; break; | |
381 | case 4: data->fan_div[nr] = 2; break; | |
382 | case 8: data->fan_div[nr] = 3; break; | |
383 | default: | |
c40769fe | 384 | dev_err(dev, "fan_div value %ld not " |
1da177e4 | 385 | "supported. Choose one of 1, 2, 4 or 8!\n", val); |
9a61bf63 | 386 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
387 | return -EINVAL; |
388 | } | |
389 | ||
390 | reg = lm78_read_value(client, LM78_REG_VID_FANDIV); | |
391 | switch (nr) { | |
392 | case 0: | |
393 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
394 | break; | |
395 | case 1: | |
396 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
397 | break; | |
398 | } | |
399 | lm78_write_value(client, LM78_REG_VID_FANDIV, reg); | |
400 | ||
401 | data->fan_min[nr] = | |
402 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
403 | lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); | |
9a61bf63 | 404 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
405 | |
406 | return count; | |
407 | } | |
408 | ||
409 | #define show_fan_offset(offset) \ | |
8627f9ba | 410 | static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
411 | { \ |
412 | return show_fan(dev, buf, offset - 1); \ | |
413 | } \ | |
8627f9ba | 414 | static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
415 | { \ |
416 | return show_fan_min(dev, buf, offset - 1); \ | |
417 | } \ | |
8627f9ba | 418 | static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
419 | { \ |
420 | return show_fan_div(dev, buf, offset - 1); \ | |
421 | } \ | |
8627f9ba | 422 | static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
423 | const char *buf, size_t count) \ |
424 | { \ | |
425 | return set_fan_min(dev, buf, count, offset - 1); \ | |
426 | } \ | |
427 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\ | |
428 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
429 | show_fan_##offset##_min, set_fan_##offset##_min); | |
430 | ||
8627f9ba | 431 | static ssize_t set_fan_1_div(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
432 | size_t count) |
433 | { | |
434 | return set_fan_div(dev, buf, count, 0) ; | |
435 | } | |
436 | ||
8627f9ba | 437 | static ssize_t set_fan_2_div(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
438 | size_t count) |
439 | { | |
440 | return set_fan_div(dev, buf, count, 1) ; | |
441 | } | |
442 | ||
443 | show_fan_offset(1); | |
444 | show_fan_offset(2); | |
445 | show_fan_offset(3); | |
446 | ||
447 | /* Fan 3 divisor is locked in H/W */ | |
448 | static DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, | |
449 | show_fan_1_div, set_fan_1_div); | |
450 | static DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
451 | show_fan_2_div, set_fan_2_div); | |
452 | static DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_3_div, NULL); | |
453 | ||
454 | /* VID */ | |
8627f9ba | 455 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
456 | { |
457 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 458 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 LT |
459 | } |
460 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
461 | ||
462 | /* Alarms */ | |
8627f9ba | 463 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
464 | { |
465 | struct lm78_data *data = lm78_update_device(dev); | |
466 | return sprintf(buf, "%u\n", data->alarms); | |
467 | } | |
468 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
469 | ||
470 | /* This function is called when: | |
471 | * lm78_driver is inserted (when this module is loaded), for each | |
472 | available adapter | |
473 | * when a new adapter is inserted (and lm78_driver is still present) */ | |
474 | static int lm78_attach_adapter(struct i2c_adapter *adapter) | |
475 | { | |
476 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
477 | return 0; | |
2ed2dc3c | 478 | return i2c_probe(adapter, &addr_data, lm78_detect); |
1da177e4 LT |
479 | } |
480 | ||
c1685f61 MH |
481 | static struct attribute *lm78_attributes[] = { |
482 | &dev_attr_in0_input.attr, | |
483 | &dev_attr_in0_min.attr, | |
484 | &dev_attr_in0_max.attr, | |
485 | &dev_attr_in1_input.attr, | |
486 | &dev_attr_in1_min.attr, | |
487 | &dev_attr_in1_max.attr, | |
488 | &dev_attr_in2_input.attr, | |
489 | &dev_attr_in2_min.attr, | |
490 | &dev_attr_in2_max.attr, | |
491 | &dev_attr_in3_input.attr, | |
492 | &dev_attr_in3_min.attr, | |
493 | &dev_attr_in3_max.attr, | |
494 | &dev_attr_in4_input.attr, | |
495 | &dev_attr_in4_min.attr, | |
496 | &dev_attr_in4_max.attr, | |
497 | &dev_attr_in5_input.attr, | |
498 | &dev_attr_in5_min.attr, | |
499 | &dev_attr_in5_max.attr, | |
500 | &dev_attr_in6_input.attr, | |
501 | &dev_attr_in6_min.attr, | |
502 | &dev_attr_in6_max.attr, | |
503 | &dev_attr_temp1_input.attr, | |
504 | &dev_attr_temp1_max.attr, | |
505 | &dev_attr_temp1_max_hyst.attr, | |
506 | &dev_attr_fan1_input.attr, | |
507 | &dev_attr_fan1_min.attr, | |
508 | &dev_attr_fan1_div.attr, | |
509 | &dev_attr_fan2_input.attr, | |
510 | &dev_attr_fan2_min.attr, | |
511 | &dev_attr_fan2_div.attr, | |
512 | &dev_attr_fan3_input.attr, | |
513 | &dev_attr_fan3_min.attr, | |
514 | &dev_attr_fan3_div.attr, | |
515 | &dev_attr_alarms.attr, | |
516 | &dev_attr_cpu0_vid.attr, | |
517 | ||
518 | NULL | |
519 | }; | |
520 | ||
521 | static const struct attribute_group lm78_group = { | |
522 | .attrs = lm78_attributes, | |
523 | }; | |
524 | ||
c40769fe JD |
525 | /* I2C devices get this name attribute automatically, but for ISA devices |
526 | we must create it by ourselves. */ | |
527 | static ssize_t show_name(struct device *dev, struct device_attribute | |
528 | *devattr, char *buf) | |
529 | { | |
530 | struct lm78_data *data = dev_get_drvdata(dev); | |
531 | ||
532 | return sprintf(buf, "%s\n", data->client.name); | |
533 | } | |
534 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
535 | ||
2ed2dc3c | 536 | /* This function is called by i2c_probe */ |
d8d20615 | 537 | static int lm78_detect(struct i2c_adapter *adapter, int address, int kind) |
1da177e4 LT |
538 | { |
539 | int i, err; | |
540 | struct i2c_client *new_client; | |
541 | struct lm78_data *data; | |
542 | const char *client_name = ""; | |
1da177e4 | 543 | |
c40769fe | 544 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
1da177e4 | 545 | err = -ENODEV; |
c40769fe | 546 | goto ERROR1; |
1da177e4 LT |
547 | } |
548 | ||
549 | /* OK. For now, we presume we have a valid client. We now create the | |
550 | client structure, even though we cannot fill it completely yet. | |
551 | But it allows us to access lm78_{read,write}_value. */ | |
552 | ||
ba9c2e8d | 553 | if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) { |
1da177e4 LT |
554 | err = -ENOMEM; |
555 | goto ERROR1; | |
556 | } | |
1da177e4 LT |
557 | |
558 | new_client = &data->client; | |
1da177e4 LT |
559 | i2c_set_clientdata(new_client, data); |
560 | new_client->addr = address; | |
561 | new_client->adapter = adapter; | |
c40769fe | 562 | new_client->driver = &lm78_driver; |
1da177e4 LT |
563 | |
564 | /* Now, we do the remaining detection. */ | |
565 | if (kind < 0) { | |
566 | if (lm78_read_value(new_client, LM78_REG_CONFIG) & 0x80) { | |
567 | err = -ENODEV; | |
568 | goto ERROR2; | |
569 | } | |
c40769fe JD |
570 | if (lm78_read_value(new_client, LM78_REG_I2C_ADDR) != |
571 | address) { | |
1da177e4 LT |
572 | err = -ENODEV; |
573 | goto ERROR2; | |
574 | } | |
575 | } | |
576 | ||
577 | /* Determine the chip type. */ | |
578 | if (kind <= 0) { | |
579 | i = lm78_read_value(new_client, LM78_REG_CHIPID); | |
27fe048e JD |
580 | if (i == 0x00 || i == 0x20 /* LM78 */ |
581 | || i == 0x40) /* LM78-J */ | |
1da177e4 | 582 | kind = lm78; |
1da177e4 LT |
583 | else if ((i & 0xfe) == 0xc0) |
584 | kind = lm79; | |
585 | else { | |
586 | if (kind == 0) | |
587 | dev_warn(&adapter->dev, "Ignoring 'force' " | |
588 | "parameter for unknown chip at " | |
589 | "adapter %d, address 0x%02x\n", | |
590 | i2c_adapter_id(adapter), address); | |
591 | err = -ENODEV; | |
592 | goto ERROR2; | |
593 | } | |
594 | } | |
595 | ||
596 | if (kind == lm78) { | |
597 | client_name = "lm78"; | |
1da177e4 LT |
598 | } else if (kind == lm79) { |
599 | client_name = "lm79"; | |
600 | } | |
601 | ||
602 | /* Fill in the remaining client fields and put into the global list */ | |
603 | strlcpy(new_client->name, client_name, I2C_NAME_SIZE); | |
604 | data->type = kind; | |
605 | ||
1da177e4 LT |
606 | /* Tell the I2C layer a new client has arrived */ |
607 | if ((err = i2c_attach_client(new_client))) | |
608 | goto ERROR2; | |
609 | ||
610 | /* Initialize the LM78 chip */ | |
611 | lm78_init_client(new_client); | |
612 | ||
1da177e4 | 613 | /* Register sysfs hooks */ |
c1685f61 MH |
614 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm78_group))) |
615 | goto ERROR3; | |
616 | ||
943b0830 MH |
617 | data->class_dev = hwmon_device_register(&new_client->dev); |
618 | if (IS_ERR(data->class_dev)) { | |
619 | err = PTR_ERR(data->class_dev); | |
c1685f61 | 620 | goto ERROR4; |
943b0830 MH |
621 | } |
622 | ||
1da177e4 LT |
623 | return 0; |
624 | ||
c1685f61 MH |
625 | ERROR4: |
626 | sysfs_remove_group(&new_client->dev.kobj, &lm78_group); | |
943b0830 MH |
627 | ERROR3: |
628 | i2c_detach_client(new_client); | |
1da177e4 LT |
629 | ERROR2: |
630 | kfree(data); | |
631 | ERROR1: | |
1da177e4 LT |
632 | return err; |
633 | } | |
634 | ||
635 | static int lm78_detach_client(struct i2c_client *client) | |
636 | { | |
943b0830 | 637 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
638 | int err; |
639 | ||
943b0830 | 640 | hwmon_device_unregister(data->class_dev); |
c1685f61 | 641 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
943b0830 | 642 | |
7bef5594 | 643 | if ((err = i2c_detach_client(client))) |
1da177e4 | 644 | return err; |
1da177e4 | 645 | |
c40769fe JD |
646 | kfree(data); |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | static int __devinit lm78_isa_probe(struct platform_device *pdev) | |
652 | { | |
653 | int err; | |
654 | struct lm78_data *data; | |
655 | struct resource *res; | |
656 | const char *name; | |
657 | ||
658 | /* Reserve the ISA region */ | |
659 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
660 | if (!request_region(res->start, LM78_EXTENT, "lm78")) { | |
661 | err = -EBUSY; | |
662 | goto exit; | |
663 | } | |
664 | ||
665 | if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) { | |
666 | err = -ENOMEM; | |
667 | goto exit_release_region; | |
668 | } | |
669 | mutex_init(&data->lock); | |
670 | data->client.addr = res->start; | |
671 | i2c_set_clientdata(&data->client, data); | |
672 | platform_set_drvdata(pdev, data); | |
673 | ||
674 | if (lm78_read_value(&data->client, LM78_REG_CHIPID) & 0x80) { | |
675 | data->type = lm79; | |
676 | name = "lm79"; | |
677 | } else { | |
678 | data->type = lm78; | |
679 | name = "lm78"; | |
680 | } | |
681 | strlcpy(data->client.name, name, I2C_NAME_SIZE); | |
682 | ||
683 | /* Initialize the LM78 chip */ | |
684 | lm78_init_client(&data->client); | |
685 | ||
686 | /* Register sysfs hooks */ | |
687 | if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group)) | |
688 | || (err = device_create_file(&pdev->dev, &dev_attr_name))) | |
689 | goto exit_remove_files; | |
690 | ||
691 | data->class_dev = hwmon_device_register(&pdev->dev); | |
692 | if (IS_ERR(data->class_dev)) { | |
693 | err = PTR_ERR(data->class_dev); | |
694 | goto exit_remove_files; | |
695 | } | |
696 | ||
697 | return 0; | |
698 | ||
699 | exit_remove_files: | |
700 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
701 | device_remove_file(&pdev->dev, &dev_attr_name); | |
702 | kfree(data); | |
703 | exit_release_region: | |
704 | release_region(res->start, LM78_EXTENT); | |
705 | exit: | |
706 | return err; | |
707 | } | |
708 | ||
709 | static int __devexit lm78_isa_remove(struct platform_device *pdev) | |
710 | { | |
711 | struct lm78_data *data = platform_get_drvdata(pdev); | |
1da177e4 | 712 | |
c40769fe JD |
713 | hwmon_device_unregister(data->class_dev); |
714 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
715 | device_remove_file(&pdev->dev, &dev_attr_name); | |
716 | release_region(data->client.addr, LM78_EXTENT); | |
943b0830 | 717 | kfree(data); |
1da177e4 LT |
718 | |
719 | return 0; | |
720 | } | |
721 | ||
44bbe87e | 722 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
1da177e4 LT |
723 | We don't want to lock the whole ISA bus, so we lock each client |
724 | separately. | |
725 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
726 | would slow down the LM78 access and should not be necessary. */ | |
727 | static int lm78_read_value(struct i2c_client *client, u8 reg) | |
728 | { | |
729 | int res; | |
c40769fe | 730 | if (!client->driver) { /* ISA device */ |
1da177e4 | 731 | struct lm78_data *data = i2c_get_clientdata(client); |
9a61bf63 | 732 | mutex_lock(&data->lock); |
1da177e4 LT |
733 | outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET); |
734 | res = inb_p(client->addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 735 | mutex_unlock(&data->lock); |
1da177e4 LT |
736 | return res; |
737 | } else | |
738 | return i2c_smbus_read_byte_data(client, reg); | |
739 | } | |
740 | ||
44bbe87e | 741 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
1da177e4 LT |
742 | We don't want to lock the whole ISA bus, so we lock each client |
743 | separately. | |
744 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
745 | would slow down the LM78 access and should not be necessary. | |
746 | There are some ugly typecasts here, but the good new is - they should | |
747 | nowhere else be necessary! */ | |
748 | static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value) | |
749 | { | |
c40769fe | 750 | if (!client->driver) { /* ISA device */ |
1da177e4 | 751 | struct lm78_data *data = i2c_get_clientdata(client); |
9a61bf63 | 752 | mutex_lock(&data->lock); |
1da177e4 LT |
753 | outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET); |
754 | outb_p(value, client->addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 755 | mutex_unlock(&data->lock); |
1da177e4 LT |
756 | return 0; |
757 | } else | |
758 | return i2c_smbus_write_byte_data(client, reg, value); | |
759 | } | |
760 | ||
1da177e4 LT |
761 | static void lm78_init_client(struct i2c_client *client) |
762 | { | |
c40769fe JD |
763 | struct lm78_data *data = i2c_get_clientdata(client); |
764 | u8 config; | |
765 | int i; | |
1da177e4 LT |
766 | |
767 | /* Start monitoring */ | |
c40769fe JD |
768 | config = lm78_read_value(client, LM78_REG_CONFIG); |
769 | if ((config & 0x09) != 0x01) | |
1da177e4 LT |
770 | lm78_write_value(client, LM78_REG_CONFIG, |
771 | (config & 0xf7) | 0x01); | |
c40769fe JD |
772 | |
773 | /* A few vars need to be filled upon startup */ | |
774 | for (i = 0; i < 3; i++) { | |
775 | data->fan_min[i] = lm78_read_value(client, | |
776 | LM78_REG_FAN_MIN(i)); | |
777 | } | |
778 | ||
779 | mutex_init(&data->update_lock); | |
1da177e4 LT |
780 | } |
781 | ||
782 | static struct lm78_data *lm78_update_device(struct device *dev) | |
783 | { | |
c40769fe JD |
784 | struct lm78_data *data = dev_get_drvdata(dev); |
785 | struct i2c_client *client = &data->client; | |
1da177e4 LT |
786 | int i; |
787 | ||
9a61bf63 | 788 | mutex_lock(&data->update_lock); |
1da177e4 LT |
789 | |
790 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
791 | || !data->valid) { | |
792 | ||
c40769fe | 793 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
794 | |
795 | for (i = 0; i <= 6; i++) { | |
796 | data->in[i] = | |
797 | lm78_read_value(client, LM78_REG_IN(i)); | |
798 | data->in_min[i] = | |
799 | lm78_read_value(client, LM78_REG_IN_MIN(i)); | |
800 | data->in_max[i] = | |
801 | lm78_read_value(client, LM78_REG_IN_MAX(i)); | |
802 | } | |
803 | for (i = 0; i < 3; i++) { | |
804 | data->fan[i] = | |
805 | lm78_read_value(client, LM78_REG_FAN(i)); | |
806 | data->fan_min[i] = | |
807 | lm78_read_value(client, LM78_REG_FAN_MIN(i)); | |
808 | } | |
809 | data->temp = lm78_read_value(client, LM78_REG_TEMP); | |
810 | data->temp_over = | |
811 | lm78_read_value(client, LM78_REG_TEMP_OVER); | |
812 | data->temp_hyst = | |
813 | lm78_read_value(client, LM78_REG_TEMP_HYST); | |
814 | i = lm78_read_value(client, LM78_REG_VID_FANDIV); | |
815 | data->vid = i & 0x0f; | |
816 | if (data->type == lm79) | |
817 | data->vid |= | |
818 | (lm78_read_value(client, LM78_REG_CHIPID) & | |
819 | 0x01) << 4; | |
820 | else | |
821 | data->vid |= 0x10; | |
822 | data->fan_div[0] = (i >> 4) & 0x03; | |
823 | data->fan_div[1] = i >> 6; | |
824 | data->alarms = lm78_read_value(client, LM78_REG_ALARM1) + | |
825 | (lm78_read_value(client, LM78_REG_ALARM2) << 8); | |
826 | data->last_updated = jiffies; | |
827 | data->valid = 1; | |
828 | ||
829 | data->fan_div[2] = 1; | |
830 | } | |
831 | ||
9a61bf63 | 832 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
833 | |
834 | return data; | |
835 | } | |
836 | ||
c40769fe JD |
837 | /* return 1 if a supported chip is found, 0 otherwise */ |
838 | static int __init lm78_isa_found(unsigned short address) | |
839 | { | |
840 | int val, save, found = 0; | |
841 | ||
842 | if (!request_region(address, LM78_EXTENT, "lm78")) | |
843 | return 0; | |
844 | ||
845 | #define REALLY_SLOW_IO | |
846 | /* We need the timeouts for at least some LM78-like | |
847 | chips. But only if we read 'undefined' registers. */ | |
848 | val = inb_p(address + 1); | |
849 | if (inb_p(address + 2) != val | |
850 | || inb_p(address + 3) != val | |
851 | || inb_p(address + 7) != val) | |
852 | goto release; | |
853 | #undef REALLY_SLOW_IO | |
854 | ||
855 | /* We should be able to change the 7 LSB of the address port. The | |
856 | MSB (busy flag) should be clear initially, set after the write. */ | |
857 | save = inb_p(address + LM78_ADDR_REG_OFFSET); | |
858 | if (save & 0x80) | |
859 | goto release; | |
860 | val = ~save & 0x7f; | |
861 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
862 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
863 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
864 | goto release; | |
865 | } | |
866 | ||
867 | /* We found a device, now see if it could be an LM78 */ | |
868 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
869 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
870 | if (val & 0x80) | |
871 | goto release; | |
872 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
873 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
874 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
875 | goto release; | |
876 | ||
877 | /* The busy flag should be clear again */ | |
878 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
879 | goto release; | |
880 | ||
881 | /* Explicitly prevent the misdetection of Winbond chips */ | |
882 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
883 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
884 | if (val == 0xa3 || val == 0x5c) | |
885 | goto release; | |
886 | ||
887 | /* Explicitly prevent the misdetection of ITE chips */ | |
888 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
889 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
890 | if (val == 0x90) | |
891 | goto release; | |
892 | ||
893 | /* Determine the chip type */ | |
894 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
895 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
896 | if (val == 0x00 /* LM78 */ | |
897 | || val == 0x40 /* LM78-J */ | |
898 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
899 | found = 1; | |
900 | ||
901 | if (found) | |
902 | pr_info("lm78: Found an %s chip at %#x\n", | |
903 | val & 0x80 ? "LM79" : "LM78", (int)address); | |
904 | ||
905 | release: | |
906 | release_region(address, LM78_EXTENT); | |
907 | return found; | |
908 | } | |
909 | ||
910 | static int __init lm78_isa_device_add(unsigned short address) | |
911 | { | |
912 | struct resource res = { | |
913 | .start = address, | |
914 | .end = address + LM78_EXTENT, | |
915 | .name = "lm78", | |
916 | .flags = IORESOURCE_IO, | |
917 | }; | |
918 | int err; | |
919 | ||
920 | pdev = platform_device_alloc("lm78", address); | |
921 | if (!pdev) { | |
922 | err = -ENOMEM; | |
923 | printk(KERN_ERR "lm78: Device allocation failed\n"); | |
924 | goto exit; | |
925 | } | |
926 | ||
927 | err = platform_device_add_resources(pdev, &res, 1); | |
928 | if (err) { | |
929 | printk(KERN_ERR "lm78: Device resource addition failed " | |
930 | "(%d)\n", err); | |
931 | goto exit_device_put; | |
932 | } | |
933 | ||
934 | err = platform_device_add(pdev); | |
935 | if (err) { | |
936 | printk(KERN_ERR "lm78: Device addition failed (%d)\n", | |
937 | err); | |
938 | goto exit_device_put; | |
939 | } | |
940 | ||
941 | return 0; | |
942 | ||
943 | exit_device_put: | |
944 | platform_device_put(pdev); | |
945 | exit: | |
946 | pdev = NULL; | |
947 | return err; | |
948 | } | |
949 | ||
1da177e4 LT |
950 | static int __init sm_lm78_init(void) |
951 | { | |
fde09509 JD |
952 | int res; |
953 | ||
954 | res = i2c_add_driver(&lm78_driver); | |
955 | if (res) | |
c40769fe JD |
956 | goto exit; |
957 | ||
958 | if (lm78_isa_found(isa_address)) { | |
959 | res = platform_driver_register(&lm78_isa_driver); | |
960 | if (res) | |
961 | goto exit_unreg_i2c_driver; | |
fde09509 | 962 | |
c40769fe JD |
963 | /* Sets global pdev as a side effect */ |
964 | res = lm78_isa_device_add(isa_address); | |
965 | if (res) | |
966 | goto exit_unreg_isa_driver; | |
967 | } | |
fde09509 JD |
968 | |
969 | return 0; | |
c40769fe JD |
970 | |
971 | exit_unreg_isa_driver: | |
972 | platform_driver_unregister(&lm78_isa_driver); | |
973 | exit_unreg_i2c_driver: | |
974 | i2c_del_driver(&lm78_driver); | |
975 | exit: | |
976 | return res; | |
1da177e4 LT |
977 | } |
978 | ||
979 | static void __exit sm_lm78_exit(void) | |
980 | { | |
c40769fe JD |
981 | if (pdev) { |
982 | platform_device_unregister(pdev); | |
983 | platform_driver_unregister(&lm78_isa_driver); | |
984 | } | |
1da177e4 LT |
985 | i2c_del_driver(&lm78_driver); |
986 | } | |
987 | ||
988 | ||
989 | ||
990 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>"); | |
27fe048e | 991 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
992 | MODULE_LICENSE("GPL"); |
993 | ||
994 | module_init(sm_lm78_init); | |
995 | module_exit(sm_lm78_exit); |