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1 | /* | |
2 | * lm87.c | |
3 | * | |
4 | * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl> | |
5 | * Philip Edelbrock <phil@netroedge.com> | |
6 | * Stephen Rousset <stephen.rousset@rocketlogix.com> | |
7 | * Dan Eaton <dan.eaton@rocketlogix.com> | |
8 | * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org> | |
9 | * | |
10 | * Original port to Linux 2.6 by Jeff Oliver. | |
11 | * | |
12 | * The LM87 is a sensor chip made by National Semiconductor. It monitors up | |
13 | * to 8 voltages (including its own power source), up to three temperatures | |
14 | * (its own plus up to two external ones) and up to two fans. The default | |
15 | * configuration is 6 voltages, two temperatures and two fans (see below). | |
16 | * Voltages are scaled internally with ratios such that the nominal value of | |
17 | * each voltage correspond to a register value of 192 (which means a | |
18 | * resolution of about 0.5% of the nominal value). Temperature values are | |
19 | * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete | |
20 | * datasheet can be obtained from National's website at: | |
21 | * http://www.national.com/pf/LM/LM87.html | |
22 | * | |
23 | * Some functions share pins, so not all functions are available at the same | |
24 | * time. Which are depends on the hardware setup. This driver normally | |
25 | * assumes that firmware configured the chip correctly. Where this is not | |
26 | * the case, platform code must set the I2C client's platform_data to point | |
27 | * to a u8 value to be written to the channel register. | |
28 | * For reference, here is the list of exclusive functions: | |
29 | * - in0+in5 (default) or temp3 | |
30 | * - fan1 (default) or in6 | |
31 | * - fan2 (default) or in7 | |
32 | * - VID lines (default) or IRQ lines (not handled by this driver) | |
33 | * | |
34 | * The LM87 additionally features an analog output, supposedly usable to | |
35 | * control the speed of a fan. All new chips use pulse width modulation | |
36 | * instead. The LM87 is the only hardware monitoring chipset I know of | |
37 | * which uses amplitude modulation. Be careful when using this feature. | |
38 | * | |
39 | * This driver also supports the ADM1024, a sensor chip made by Analog | |
40 | * Devices. That chip is fully compatible with the LM87. Complete | |
41 | * datasheet can be obtained from Analog's website at: | |
42 | * http://www.analog.com/en/prod/0,2877,ADM1024,00.html | |
43 | * | |
44 | * This program is free software; you can redistribute it and/or modify | |
45 | * it under the terms of the GNU General Public License as published by | |
46 | * the Free Software Foundation; either version 2 of the License, or | |
47 | * (at your option) any later version. | |
48 | * | |
49 | * This program is distributed in the hope that it will be useful, | |
50 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
51 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
52 | * GNU General Public License for more details. | |
53 | * | |
54 | * You should have received a copy of the GNU General Public License | |
55 | * along with this program; if not, write to the Free Software | |
56 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
57 | */ | |
58 | ||
59 | #include <linux/module.h> | |
60 | #include <linux/init.h> | |
61 | #include <linux/slab.h> | |
62 | #include <linux/jiffies.h> | |
63 | #include <linux/i2c.h> | |
64 | #include <linux/hwmon.h> | |
65 | #include <linux/hwmon-sysfs.h> | |
66 | #include <linux/hwmon-vid.h> | |
67 | #include <linux/err.h> | |
68 | #include <linux/mutex.h> | |
69 | ||
70 | /* | |
71 | * Addresses to scan | |
72 | * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e. | |
73 | */ | |
74 | ||
75 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; | |
76 | ||
77 | /* | |
78 | * Insmod parameters | |
79 | */ | |
80 | ||
81 | I2C_CLIENT_INSMOD_2(lm87, adm1024); | |
82 | ||
83 | /* | |
84 | * The LM87 registers | |
85 | */ | |
86 | ||
87 | /* nr in 0..5 */ | |
88 | #define LM87_REG_IN(nr) (0x20 + (nr)) | |
89 | #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2) | |
90 | #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2) | |
91 | /* nr in 0..1 */ | |
92 | #define LM87_REG_AIN(nr) (0x28 + (nr)) | |
93 | #define LM87_REG_AIN_MIN(nr) (0x1A + (nr)) | |
94 | #define LM87_REG_AIN_MAX(nr) (0x3B + (nr)) | |
95 | ||
96 | static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 }; | |
97 | static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B }; | |
98 | static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C }; | |
99 | ||
100 | #define LM87_REG_TEMP_HW_INT_LOCK 0x13 | |
101 | #define LM87_REG_TEMP_HW_EXT_LOCK 0x14 | |
102 | #define LM87_REG_TEMP_HW_INT 0x17 | |
103 | #define LM87_REG_TEMP_HW_EXT 0x18 | |
104 | ||
105 | /* nr in 0..1 */ | |
106 | #define LM87_REG_FAN(nr) (0x28 + (nr)) | |
107 | #define LM87_REG_FAN_MIN(nr) (0x3B + (nr)) | |
108 | #define LM87_REG_AOUT 0x19 | |
109 | ||
110 | #define LM87_REG_CONFIG 0x40 | |
111 | #define LM87_REG_CHANNEL_MODE 0x16 | |
112 | #define LM87_REG_VID_FAN_DIV 0x47 | |
113 | #define LM87_REG_VID4 0x49 | |
114 | ||
115 | #define LM87_REG_ALARMS1 0x41 | |
116 | #define LM87_REG_ALARMS2 0x42 | |
117 | ||
118 | #define LM87_REG_COMPANY_ID 0x3E | |
119 | #define LM87_REG_REVISION 0x3F | |
120 | ||
121 | /* | |
122 | * Conversions and various macros | |
123 | * The LM87 uses signed 8-bit values for temperatures. | |
124 | */ | |
125 | ||
126 | #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) | |
127 | #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ | |
128 | (val) * 192 >= (scale) * 255 ? 255 : \ | |
129 | ((val) * 192 + (scale)/2) / (scale)) | |
130 | ||
131 | #define TEMP_FROM_REG(reg) ((reg) * 1000) | |
132 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ | |
133 | (val) >= 126500 ? 127 : \ | |
134 | (((val) < 0 ? (val)-500 : (val)+500) / 1000)) | |
135 | ||
136 | #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \ | |
137 | (1350000 + (reg)*(div) / 2) / ((reg)*(div))) | |
138 | #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \ | |
139 | (1350000 + (val)*(div) / 2) / ((val)*(div))) | |
140 | ||
141 | #define FAN_DIV_FROM_REG(reg) (1 << (reg)) | |
142 | ||
143 | /* analog out is 9.80mV/LSB */ | |
144 | #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10) | |
145 | #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \ | |
146 | (val) >= 2500 ? 255 : \ | |
147 | ((val) * 10 + 49) / 98) | |
148 | ||
149 | /* nr in 0..1 */ | |
150 | #define CHAN_NO_FAN(nr) (1 << (nr)) | |
151 | #define CHAN_TEMP3 (1 << 2) | |
152 | #define CHAN_VCC_5V (1 << 3) | |
153 | #define CHAN_NO_VID (1 << 7) | |
154 | ||
155 | /* | |
156 | * Functions declaration | |
157 | */ | |
158 | ||
159 | static int lm87_probe(struct i2c_client *client, | |
160 | const struct i2c_device_id *id); | |
161 | static int lm87_detect(struct i2c_client *new_client, int kind, | |
162 | struct i2c_board_info *info); | |
163 | static void lm87_init_client(struct i2c_client *client); | |
164 | static int lm87_remove(struct i2c_client *client); | |
165 | static struct lm87_data *lm87_update_device(struct device *dev); | |
166 | ||
167 | /* | |
168 | * Driver data (common to all clients) | |
169 | */ | |
170 | ||
171 | static const struct i2c_device_id lm87_id[] = { | |
172 | { "lm87", lm87 }, | |
173 | { "adm1024", adm1024 }, | |
174 | { } | |
175 | }; | |
176 | MODULE_DEVICE_TABLE(i2c, lm87_id); | |
177 | ||
178 | static struct i2c_driver lm87_driver = { | |
179 | .class = I2C_CLASS_HWMON, | |
180 | .driver = { | |
181 | .name = "lm87", | |
182 | }, | |
183 | .probe = lm87_probe, | |
184 | .remove = lm87_remove, | |
185 | .id_table = lm87_id, | |
186 | .detect = lm87_detect, | |
187 | .address_data = &addr_data, | |
188 | }; | |
189 | ||
190 | /* | |
191 | * Client data (each client gets its own) | |
192 | */ | |
193 | ||
194 | struct lm87_data { | |
195 | struct device *hwmon_dev; | |
196 | struct mutex update_lock; | |
197 | char valid; /* zero until following fields are valid */ | |
198 | unsigned long last_updated; /* In jiffies */ | |
199 | ||
200 | u8 channel; /* register value */ | |
201 | u8 config; /* original register value */ | |
202 | ||
203 | u8 in[8]; /* register value */ | |
204 | u8 in_max[8]; /* register value */ | |
205 | u8 in_min[8]; /* register value */ | |
206 | u16 in_scale[8]; | |
207 | ||
208 | s8 temp[3]; /* register value */ | |
209 | s8 temp_high[3]; /* register value */ | |
210 | s8 temp_low[3]; /* register value */ | |
211 | s8 temp_crit_int; /* min of two register values */ | |
212 | s8 temp_crit_ext; /* min of two register values */ | |
213 | ||
214 | u8 fan[2]; /* register value */ | |
215 | u8 fan_min[2]; /* register value */ | |
216 | u8 fan_div[2]; /* register value, shifted right */ | |
217 | u8 aout; /* register value */ | |
218 | ||
219 | u16 alarms; /* register values, combined */ | |
220 | u8 vid; /* register values, combined */ | |
221 | u8 vrm; | |
222 | }; | |
223 | ||
224 | /* | |
225 | * Sysfs stuff | |
226 | */ | |
227 | ||
228 | static inline int lm87_read_value(struct i2c_client *client, u8 reg) | |
229 | { | |
230 | return i2c_smbus_read_byte_data(client, reg); | |
231 | } | |
232 | ||
233 | static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value) | |
234 | { | |
235 | return i2c_smbus_write_byte_data(client, reg, value); | |
236 | } | |
237 | ||
238 | #define show_in(offset) \ | |
239 | static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ | |
240 | { \ | |
241 | struct lm87_data *data = lm87_update_device(dev); \ | |
242 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ | |
243 | data->in_scale[offset])); \ | |
244 | } \ | |
245 | static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ | |
246 | { \ | |
247 | struct lm87_data *data = lm87_update_device(dev); \ | |
248 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ | |
249 | data->in_scale[offset])); \ | |
250 | } \ | |
251 | static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ | |
252 | { \ | |
253 | struct lm87_data *data = lm87_update_device(dev); \ | |
254 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ | |
255 | data->in_scale[offset])); \ | |
256 | } \ | |
257 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ | |
258 | show_in##offset##_input, NULL); | |
259 | show_in(0); | |
260 | show_in(1); | |
261 | show_in(2); | |
262 | show_in(3); | |
263 | show_in(4); | |
264 | show_in(5); | |
265 | show_in(6); | |
266 | show_in(7); | |
267 | ||
268 | static void set_in_min(struct device *dev, const char *buf, int nr) | |
269 | { | |
270 | struct i2c_client *client = to_i2c_client(dev); | |
271 | struct lm87_data *data = i2c_get_clientdata(client); | |
272 | long val = simple_strtol(buf, NULL, 10); | |
273 | ||
274 | mutex_lock(&data->update_lock); | |
275 | data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]); | |
276 | lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) : | |
277 | LM87_REG_AIN_MIN(nr-6), data->in_min[nr]); | |
278 | mutex_unlock(&data->update_lock); | |
279 | } | |
280 | ||
281 | static void set_in_max(struct device *dev, const char *buf, int nr) | |
282 | { | |
283 | struct i2c_client *client = to_i2c_client(dev); | |
284 | struct lm87_data *data = i2c_get_clientdata(client); | |
285 | long val = simple_strtol(buf, NULL, 10); | |
286 | ||
287 | mutex_lock(&data->update_lock); | |
288 | data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]); | |
289 | lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) : | |
290 | LM87_REG_AIN_MAX(nr-6), data->in_max[nr]); | |
291 | mutex_unlock(&data->update_lock); | |
292 | } | |
293 | ||
294 | #define set_in(offset) \ | |
295 | static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \ | |
296 | const char *buf, size_t count) \ | |
297 | { \ | |
298 | set_in_min(dev, buf, offset); \ | |
299 | return count; \ | |
300 | } \ | |
301 | static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \ | |
302 | const char *buf, size_t count) \ | |
303 | { \ | |
304 | set_in_max(dev, buf, offset); \ | |
305 | return count; \ | |
306 | } \ | |
307 | static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
308 | show_in##offset##_min, set_in##offset##_min); \ | |
309 | static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
310 | show_in##offset##_max, set_in##offset##_max); | |
311 | set_in(0); | |
312 | set_in(1); | |
313 | set_in(2); | |
314 | set_in(3); | |
315 | set_in(4); | |
316 | set_in(5); | |
317 | set_in(6); | |
318 | set_in(7); | |
319 | ||
320 | #define show_temp(offset) \ | |
321 | static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ | |
322 | { \ | |
323 | struct lm87_data *data = lm87_update_device(dev); \ | |
324 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ | |
325 | } \ | |
326 | static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \ | |
327 | { \ | |
328 | struct lm87_data *data = lm87_update_device(dev); \ | |
329 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \ | |
330 | } \ | |
331 | static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \ | |
332 | { \ | |
333 | struct lm87_data *data = lm87_update_device(dev); \ | |
334 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \ | |
335 | }\ | |
336 | static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ | |
337 | show_temp##offset##_input, NULL); | |
338 | show_temp(1); | |
339 | show_temp(2); | |
340 | show_temp(3); | |
341 | ||
342 | static void set_temp_low(struct device *dev, const char *buf, int nr) | |
343 | { | |
344 | struct i2c_client *client = to_i2c_client(dev); | |
345 | struct lm87_data *data = i2c_get_clientdata(client); | |
346 | long val = simple_strtol(buf, NULL, 10); | |
347 | ||
348 | mutex_lock(&data->update_lock); | |
349 | data->temp_low[nr] = TEMP_TO_REG(val); | |
350 | lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]); | |
351 | mutex_unlock(&data->update_lock); | |
352 | } | |
353 | ||
354 | static void set_temp_high(struct device *dev, const char *buf, int nr) | |
355 | { | |
356 | struct i2c_client *client = to_i2c_client(dev); | |
357 | struct lm87_data *data = i2c_get_clientdata(client); | |
358 | long val = simple_strtol(buf, NULL, 10); | |
359 | ||
360 | mutex_lock(&data->update_lock); | |
361 | data->temp_high[nr] = TEMP_TO_REG(val); | |
362 | lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]); | |
363 | mutex_unlock(&data->update_lock); | |
364 | } | |
365 | ||
366 | #define set_temp(offset) \ | |
367 | static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \ | |
368 | const char *buf, size_t count) \ | |
369 | { \ | |
370 | set_temp_low(dev, buf, offset-1); \ | |
371 | return count; \ | |
372 | } \ | |
373 | static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \ | |
374 | const char *buf, size_t count) \ | |
375 | { \ | |
376 | set_temp_high(dev, buf, offset-1); \ | |
377 | return count; \ | |
378 | } \ | |
379 | static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ | |
380 | show_temp##offset##_high, set_temp##offset##_high); \ | |
381 | static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ | |
382 | show_temp##offset##_low, set_temp##offset##_low); | |
383 | set_temp(1); | |
384 | set_temp(2); | |
385 | set_temp(3); | |
386 | ||
387 | static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf) | |
388 | { | |
389 | struct lm87_data *data = lm87_update_device(dev); | |
390 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int)); | |
391 | } | |
392 | ||
393 | static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf) | |
394 | { | |
395 | struct lm87_data *data = lm87_update_device(dev); | |
396 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext)); | |
397 | } | |
398 | ||
399 | static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL); | |
400 | static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL); | |
401 | static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL); | |
402 | ||
403 | #define show_fan(offset) \ | |
404 | static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \ | |
405 | { \ | |
406 | struct lm87_data *data = lm87_update_device(dev); \ | |
407 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \ | |
408 | FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ | |
409 | } \ | |
410 | static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ | |
411 | { \ | |
412 | struct lm87_data *data = lm87_update_device(dev); \ | |
413 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \ | |
414 | FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \ | |
415 | } \ | |
416 | static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \ | |
417 | { \ | |
418 | struct lm87_data *data = lm87_update_device(dev); \ | |
419 | return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \ | |
420 | } \ | |
421 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
422 | show_fan##offset##_input, NULL); | |
423 | show_fan(1); | |
424 | show_fan(2); | |
425 | ||
426 | static void set_fan_min(struct device *dev, const char *buf, int nr) | |
427 | { | |
428 | struct i2c_client *client = to_i2c_client(dev); | |
429 | struct lm87_data *data = i2c_get_clientdata(client); | |
430 | long val = simple_strtol(buf, NULL, 10); | |
431 | ||
432 | mutex_lock(&data->update_lock); | |
433 | data->fan_min[nr] = FAN_TO_REG(val, | |
434 | FAN_DIV_FROM_REG(data->fan_div[nr])); | |
435 | lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]); | |
436 | mutex_unlock(&data->update_lock); | |
437 | } | |
438 | ||
439 | /* Note: we save and restore the fan minimum here, because its value is | |
440 | determined in part by the fan clock divider. This follows the principle | |
441 | of least surprise; the user doesn't expect the fan minimum to change just | |
442 | because the divider changed. */ | |
443 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
444 | size_t count, int nr) | |
445 | { | |
446 | struct i2c_client *client = to_i2c_client(dev); | |
447 | struct lm87_data *data = i2c_get_clientdata(client); | |
448 | long val = simple_strtol(buf, NULL, 10); | |
449 | unsigned long min; | |
450 | u8 reg; | |
451 | ||
452 | mutex_lock(&data->update_lock); | |
453 | min = FAN_FROM_REG(data->fan_min[nr], | |
454 | FAN_DIV_FROM_REG(data->fan_div[nr])); | |
455 | ||
456 | switch (val) { | |
457 | case 1: data->fan_div[nr] = 0; break; | |
458 | case 2: data->fan_div[nr] = 1; break; | |
459 | case 4: data->fan_div[nr] = 2; break; | |
460 | case 8: data->fan_div[nr] = 3; break; | |
461 | default: | |
462 | mutex_unlock(&data->update_lock); | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV); | |
467 | switch (nr) { | |
468 | case 0: | |
469 | reg = (reg & 0xCF) | (data->fan_div[0] << 4); | |
470 | break; | |
471 | case 1: | |
472 | reg = (reg & 0x3F) | (data->fan_div[1] << 6); | |
473 | break; | |
474 | } | |
475 | lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg); | |
476 | ||
477 | data->fan_min[nr] = FAN_TO_REG(min, val); | |
478 | lm87_write_value(client, LM87_REG_FAN_MIN(nr), | |
479 | data->fan_min[nr]); | |
480 | mutex_unlock(&data->update_lock); | |
481 | ||
482 | return count; | |
483 | } | |
484 | ||
485 | #define set_fan(offset) \ | |
486 | static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ | |
487 | size_t count) \ | |
488 | { \ | |
489 | set_fan_min(dev, buf, offset-1); \ | |
490 | return count; \ | |
491 | } \ | |
492 | static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \ | |
493 | size_t count) \ | |
494 | { \ | |
495 | return set_fan_div(dev, buf, count, offset-1); \ | |
496 | } \ | |
497 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
498 | show_fan##offset##_min, set_fan##offset##_min); \ | |
499 | static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
500 | show_fan##offset##_div, set_fan##offset##_div); | |
501 | set_fan(1); | |
502 | set_fan(2); | |
503 | ||
504 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) | |
505 | { | |
506 | struct lm87_data *data = lm87_update_device(dev); | |
507 | return sprintf(buf, "%d\n", data->alarms); | |
508 | } | |
509 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
510 | ||
511 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) | |
512 | { | |
513 | struct lm87_data *data = lm87_update_device(dev); | |
514 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
515 | } | |
516 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
517 | ||
518 | static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) | |
519 | { | |
520 | struct lm87_data *data = dev_get_drvdata(dev); | |
521 | return sprintf(buf, "%d\n", data->vrm); | |
522 | } | |
523 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) | |
524 | { | |
525 | struct lm87_data *data = dev_get_drvdata(dev); | |
526 | data->vrm = simple_strtoul(buf, NULL, 10); | |
527 | return count; | |
528 | } | |
529 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); | |
530 | ||
531 | static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf) | |
532 | { | |
533 | struct lm87_data *data = lm87_update_device(dev); | |
534 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
535 | } | |
536 | static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) | |
537 | { | |
538 | struct i2c_client *client = to_i2c_client(dev); | |
539 | struct lm87_data *data = i2c_get_clientdata(client); | |
540 | long val = simple_strtol(buf, NULL, 10); | |
541 | ||
542 | mutex_lock(&data->update_lock); | |
543 | data->aout = AOUT_TO_REG(val); | |
544 | lm87_write_value(client, LM87_REG_AOUT, data->aout); | |
545 | mutex_unlock(&data->update_lock); | |
546 | return count; | |
547 | } | |
548 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
549 | ||
550 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, | |
551 | char *buf) | |
552 | { | |
553 | struct lm87_data *data = lm87_update_device(dev); | |
554 | int bitnr = to_sensor_dev_attr(attr)->index; | |
555 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
556 | } | |
557 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
558 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
559 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
560 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
561 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
562 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
563 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); | |
564 | static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); | |
565 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
566 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); | |
567 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5); | |
568 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
569 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
570 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14); | |
571 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15); | |
572 | ||
573 | /* | |
574 | * Real code | |
575 | */ | |
576 | ||
577 | static struct attribute *lm87_attributes[] = { | |
578 | &dev_attr_in1_input.attr, | |
579 | &dev_attr_in1_min.attr, | |
580 | &dev_attr_in1_max.attr, | |
581 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
582 | &dev_attr_in2_input.attr, | |
583 | &dev_attr_in2_min.attr, | |
584 | &dev_attr_in2_max.attr, | |
585 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
586 | &dev_attr_in3_input.attr, | |
587 | &dev_attr_in3_min.attr, | |
588 | &dev_attr_in3_max.attr, | |
589 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
590 | &dev_attr_in4_input.attr, | |
591 | &dev_attr_in4_min.attr, | |
592 | &dev_attr_in4_max.attr, | |
593 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
594 | ||
595 | &dev_attr_temp1_input.attr, | |
596 | &dev_attr_temp1_max.attr, | |
597 | &dev_attr_temp1_min.attr, | |
598 | &dev_attr_temp1_crit.attr, | |
599 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, | |
600 | &dev_attr_temp2_input.attr, | |
601 | &dev_attr_temp2_max.attr, | |
602 | &dev_attr_temp2_min.attr, | |
603 | &dev_attr_temp2_crit.attr, | |
604 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
605 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
606 | ||
607 | &dev_attr_alarms.attr, | |
608 | &dev_attr_aout_output.attr, | |
609 | ||
610 | NULL | |
611 | }; | |
612 | ||
613 | static const struct attribute_group lm87_group = { | |
614 | .attrs = lm87_attributes, | |
615 | }; | |
616 | ||
617 | static struct attribute *lm87_attributes_opt[] = { | |
618 | &dev_attr_in6_input.attr, | |
619 | &dev_attr_in6_min.attr, | |
620 | &dev_attr_in6_max.attr, | |
621 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
622 | ||
623 | &dev_attr_fan1_input.attr, | |
624 | &dev_attr_fan1_min.attr, | |
625 | &dev_attr_fan1_div.attr, | |
626 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, | |
627 | ||
628 | &dev_attr_in7_input.attr, | |
629 | &dev_attr_in7_min.attr, | |
630 | &dev_attr_in7_max.attr, | |
631 | &sensor_dev_attr_in7_alarm.dev_attr.attr, | |
632 | ||
633 | &dev_attr_fan2_input.attr, | |
634 | &dev_attr_fan2_min.attr, | |
635 | &dev_attr_fan2_div.attr, | |
636 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, | |
637 | ||
638 | &dev_attr_temp3_input.attr, | |
639 | &dev_attr_temp3_max.attr, | |
640 | &dev_attr_temp3_min.attr, | |
641 | &dev_attr_temp3_crit.attr, | |
642 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, | |
643 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
644 | ||
645 | &dev_attr_in0_input.attr, | |
646 | &dev_attr_in0_min.attr, | |
647 | &dev_attr_in0_max.attr, | |
648 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
649 | &dev_attr_in5_input.attr, | |
650 | &dev_attr_in5_min.attr, | |
651 | &dev_attr_in5_max.attr, | |
652 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
653 | ||
654 | &dev_attr_cpu0_vid.attr, | |
655 | &dev_attr_vrm.attr, | |
656 | ||
657 | NULL | |
658 | }; | |
659 | ||
660 | static const struct attribute_group lm87_group_opt = { | |
661 | .attrs = lm87_attributes_opt, | |
662 | }; | |
663 | ||
664 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
665 | static int lm87_detect(struct i2c_client *new_client, int kind, | |
666 | struct i2c_board_info *info) | |
667 | { | |
668 | struct i2c_adapter *adapter = new_client->adapter; | |
669 | static const char *names[] = { "lm87", "adm1024" }; | |
670 | ||
671 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
672 | return -ENODEV; | |
673 | ||
674 | /* Default to an LM87 if forced */ | |
675 | if (kind == 0) | |
676 | kind = lm87; | |
677 | ||
678 | /* Now, we do the remaining detection. */ | |
679 | if (kind < 0) { | |
680 | u8 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID); | |
681 | u8 rev = lm87_read_value(new_client, LM87_REG_REVISION); | |
682 | ||
683 | if (cid == 0x02 /* National Semiconductor */ | |
684 | && (rev >= 0x01 && rev <= 0x08)) | |
685 | kind = lm87; | |
686 | else if (cid == 0x41 /* Analog Devices */ | |
687 | && (rev & 0xf0) == 0x10) | |
688 | kind = adm1024; | |
689 | ||
690 | if (kind < 0 | |
691 | || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) { | |
692 | dev_dbg(&adapter->dev, | |
693 | "LM87 detection failed at 0x%02x.\n", | |
694 | new_client->addr); | |
695 | return -ENODEV; | |
696 | } | |
697 | } | |
698 | ||
699 | strlcpy(info->type, names[kind - 1], I2C_NAME_SIZE); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | static int lm87_probe(struct i2c_client *new_client, | |
705 | const struct i2c_device_id *id) | |
706 | { | |
707 | struct lm87_data *data; | |
708 | int err; | |
709 | ||
710 | data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL); | |
711 | if (!data) { | |
712 | err = -ENOMEM; | |
713 | goto exit; | |
714 | } | |
715 | ||
716 | i2c_set_clientdata(new_client, data); | |
717 | data->valid = 0; | |
718 | mutex_init(&data->update_lock); | |
719 | ||
720 | /* Initialize the LM87 chip */ | |
721 | lm87_init_client(new_client); | |
722 | ||
723 | data->in_scale[0] = 2500; | |
724 | data->in_scale[1] = 2700; | |
725 | data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300; | |
726 | data->in_scale[3] = 5000; | |
727 | data->in_scale[4] = 12000; | |
728 | data->in_scale[5] = 2700; | |
729 | data->in_scale[6] = 1875; | |
730 | data->in_scale[7] = 1875; | |
731 | ||
732 | /* Register sysfs hooks */ | |
733 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group))) | |
734 | goto exit_free; | |
735 | ||
736 | if (data->channel & CHAN_NO_FAN(0)) { | |
737 | if ((err = device_create_file(&new_client->dev, | |
738 | &dev_attr_in6_input)) | |
739 | || (err = device_create_file(&new_client->dev, | |
740 | &dev_attr_in6_min)) | |
741 | || (err = device_create_file(&new_client->dev, | |
742 | &dev_attr_in6_max)) | |
743 | || (err = device_create_file(&new_client->dev, | |
744 | &sensor_dev_attr_in6_alarm.dev_attr))) | |
745 | goto exit_remove; | |
746 | } else { | |
747 | if ((err = device_create_file(&new_client->dev, | |
748 | &dev_attr_fan1_input)) | |
749 | || (err = device_create_file(&new_client->dev, | |
750 | &dev_attr_fan1_min)) | |
751 | || (err = device_create_file(&new_client->dev, | |
752 | &dev_attr_fan1_div)) | |
753 | || (err = device_create_file(&new_client->dev, | |
754 | &sensor_dev_attr_fan1_alarm.dev_attr))) | |
755 | goto exit_remove; | |
756 | } | |
757 | ||
758 | if (data->channel & CHAN_NO_FAN(1)) { | |
759 | if ((err = device_create_file(&new_client->dev, | |
760 | &dev_attr_in7_input)) | |
761 | || (err = device_create_file(&new_client->dev, | |
762 | &dev_attr_in7_min)) | |
763 | || (err = device_create_file(&new_client->dev, | |
764 | &dev_attr_in7_max)) | |
765 | || (err = device_create_file(&new_client->dev, | |
766 | &sensor_dev_attr_in7_alarm.dev_attr))) | |
767 | goto exit_remove; | |
768 | } else { | |
769 | if ((err = device_create_file(&new_client->dev, | |
770 | &dev_attr_fan2_input)) | |
771 | || (err = device_create_file(&new_client->dev, | |
772 | &dev_attr_fan2_min)) | |
773 | || (err = device_create_file(&new_client->dev, | |
774 | &dev_attr_fan2_div)) | |
775 | || (err = device_create_file(&new_client->dev, | |
776 | &sensor_dev_attr_fan2_alarm.dev_attr))) | |
777 | goto exit_remove; | |
778 | } | |
779 | ||
780 | if (data->channel & CHAN_TEMP3) { | |
781 | if ((err = device_create_file(&new_client->dev, | |
782 | &dev_attr_temp3_input)) | |
783 | || (err = device_create_file(&new_client->dev, | |
784 | &dev_attr_temp3_max)) | |
785 | || (err = device_create_file(&new_client->dev, | |
786 | &dev_attr_temp3_min)) | |
787 | || (err = device_create_file(&new_client->dev, | |
788 | &dev_attr_temp3_crit)) | |
789 | || (err = device_create_file(&new_client->dev, | |
790 | &sensor_dev_attr_temp3_alarm.dev_attr)) | |
791 | || (err = device_create_file(&new_client->dev, | |
792 | &sensor_dev_attr_temp3_fault.dev_attr))) | |
793 | goto exit_remove; | |
794 | } else { | |
795 | if ((err = device_create_file(&new_client->dev, | |
796 | &dev_attr_in0_input)) | |
797 | || (err = device_create_file(&new_client->dev, | |
798 | &dev_attr_in0_min)) | |
799 | || (err = device_create_file(&new_client->dev, | |
800 | &dev_attr_in0_max)) | |
801 | || (err = device_create_file(&new_client->dev, | |
802 | &sensor_dev_attr_in0_alarm.dev_attr)) | |
803 | || (err = device_create_file(&new_client->dev, | |
804 | &dev_attr_in5_input)) | |
805 | || (err = device_create_file(&new_client->dev, | |
806 | &dev_attr_in5_min)) | |
807 | || (err = device_create_file(&new_client->dev, | |
808 | &dev_attr_in5_max)) | |
809 | || (err = device_create_file(&new_client->dev, | |
810 | &sensor_dev_attr_in5_alarm.dev_attr))) | |
811 | goto exit_remove; | |
812 | } | |
813 | ||
814 | if (!(data->channel & CHAN_NO_VID)) { | |
815 | data->vrm = vid_which_vrm(); | |
816 | if ((err = device_create_file(&new_client->dev, | |
817 | &dev_attr_cpu0_vid)) | |
818 | || (err = device_create_file(&new_client->dev, | |
819 | &dev_attr_vrm))) | |
820 | goto exit_remove; | |
821 | } | |
822 | ||
823 | data->hwmon_dev = hwmon_device_register(&new_client->dev); | |
824 | if (IS_ERR(data->hwmon_dev)) { | |
825 | err = PTR_ERR(data->hwmon_dev); | |
826 | goto exit_remove; | |
827 | } | |
828 | ||
829 | return 0; | |
830 | ||
831 | exit_remove: | |
832 | sysfs_remove_group(&new_client->dev.kobj, &lm87_group); | |
833 | sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt); | |
834 | exit_free: | |
835 | lm87_write_value(new_client, LM87_REG_CONFIG, data->config); | |
836 | kfree(data); | |
837 | exit: | |
838 | return err; | |
839 | } | |
840 | ||
841 | static void lm87_init_client(struct i2c_client *client) | |
842 | { | |
843 | struct lm87_data *data = i2c_get_clientdata(client); | |
844 | ||
845 | if (client->dev.platform_data) { | |
846 | data->channel = *(u8 *)client->dev.platform_data; | |
847 | lm87_write_value(client, | |
848 | LM87_REG_CHANNEL_MODE, data->channel); | |
849 | } else { | |
850 | data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); | |
851 | } | |
852 | data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; | |
853 | ||
854 | if (!(data->config & 0x01)) { | |
855 | int i; | |
856 | ||
857 | /* Limits are left uninitialized after power-up */ | |
858 | for (i = 1; i < 6; i++) { | |
859 | lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00); | |
860 | lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF); | |
861 | } | |
862 | for (i = 0; i < 2; i++) { | |
863 | lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F); | |
864 | lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00); | |
865 | lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00); | |
866 | lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF); | |
867 | } | |
868 | if (data->channel & CHAN_TEMP3) { | |
869 | lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F); | |
870 | lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00); | |
871 | } else { | |
872 | lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00); | |
873 | lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF); | |
874 | } | |
875 | } | |
876 | ||
877 | /* Make sure Start is set and INT#_Clear is clear */ | |
878 | if ((data->config & 0x09) != 0x01) | |
879 | lm87_write_value(client, LM87_REG_CONFIG, | |
880 | (data->config & 0x77) | 0x01); | |
881 | } | |
882 | ||
883 | static int lm87_remove(struct i2c_client *client) | |
884 | { | |
885 | struct lm87_data *data = i2c_get_clientdata(client); | |
886 | ||
887 | hwmon_device_unregister(data->hwmon_dev); | |
888 | sysfs_remove_group(&client->dev.kobj, &lm87_group); | |
889 | sysfs_remove_group(&client->dev.kobj, &lm87_group_opt); | |
890 | ||
891 | lm87_write_value(client, LM87_REG_CONFIG, data->config); | |
892 | kfree(data); | |
893 | return 0; | |
894 | } | |
895 | ||
896 | static struct lm87_data *lm87_update_device(struct device *dev) | |
897 | { | |
898 | struct i2c_client *client = to_i2c_client(dev); | |
899 | struct lm87_data *data = i2c_get_clientdata(client); | |
900 | ||
901 | mutex_lock(&data->update_lock); | |
902 | ||
903 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
904 | int i, j; | |
905 | ||
906 | dev_dbg(&client->dev, "Updating data.\n"); | |
907 | ||
908 | i = (data->channel & CHAN_TEMP3) ? 1 : 0; | |
909 | j = (data->channel & CHAN_TEMP3) ? 5 : 6; | |
910 | for (; i < j; i++) { | |
911 | data->in[i] = lm87_read_value(client, | |
912 | LM87_REG_IN(i)); | |
913 | data->in_min[i] = lm87_read_value(client, | |
914 | LM87_REG_IN_MIN(i)); | |
915 | data->in_max[i] = lm87_read_value(client, | |
916 | LM87_REG_IN_MAX(i)); | |
917 | } | |
918 | ||
919 | for (i = 0; i < 2; i++) { | |
920 | if (data->channel & CHAN_NO_FAN(i)) { | |
921 | data->in[6+i] = lm87_read_value(client, | |
922 | LM87_REG_AIN(i)); | |
923 | data->in_max[6+i] = lm87_read_value(client, | |
924 | LM87_REG_AIN_MAX(i)); | |
925 | data->in_min[6+i] = lm87_read_value(client, | |
926 | LM87_REG_AIN_MIN(i)); | |
927 | ||
928 | } else { | |
929 | data->fan[i] = lm87_read_value(client, | |
930 | LM87_REG_FAN(i)); | |
931 | data->fan_min[i] = lm87_read_value(client, | |
932 | LM87_REG_FAN_MIN(i)); | |
933 | } | |
934 | } | |
935 | ||
936 | j = (data->channel & CHAN_TEMP3) ? 3 : 2; | |
937 | for (i = 0 ; i < j; i++) { | |
938 | data->temp[i] = lm87_read_value(client, | |
939 | LM87_REG_TEMP[i]); | |
940 | data->temp_high[i] = lm87_read_value(client, | |
941 | LM87_REG_TEMP_HIGH[i]); | |
942 | data->temp_low[i] = lm87_read_value(client, | |
943 | LM87_REG_TEMP_LOW[i]); | |
944 | } | |
945 | ||
946 | i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK); | |
947 | j = lm87_read_value(client, LM87_REG_TEMP_HW_INT); | |
948 | data->temp_crit_int = min(i, j); | |
949 | ||
950 | i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK); | |
951 | j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT); | |
952 | data->temp_crit_ext = min(i, j); | |
953 | ||
954 | i = lm87_read_value(client, LM87_REG_VID_FAN_DIV); | |
955 | data->fan_div[0] = (i >> 4) & 0x03; | |
956 | data->fan_div[1] = (i >> 6) & 0x03; | |
957 | data->vid = (i & 0x0F) | |
958 | | (lm87_read_value(client, LM87_REG_VID4) & 0x01) | |
959 | << 4; | |
960 | ||
961 | data->alarms = lm87_read_value(client, LM87_REG_ALARMS1) | |
962 | | (lm87_read_value(client, LM87_REG_ALARMS2) | |
963 | << 8); | |
964 | data->aout = lm87_read_value(client, LM87_REG_AOUT); | |
965 | ||
966 | data->last_updated = jiffies; | |
967 | data->valid = 1; | |
968 | } | |
969 | ||
970 | mutex_unlock(&data->update_lock); | |
971 | ||
972 | return data; | |
973 | } | |
974 | ||
975 | static int __init sensors_lm87_init(void) | |
976 | { | |
977 | return i2c_add_driver(&lm87_driver); | |
978 | } | |
979 | ||
980 | static void __exit sensors_lm87_exit(void) | |
981 | { | |
982 | i2c_del_driver(&lm87_driver); | |
983 | } | |
984 | ||
985 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others"); | |
986 | MODULE_DESCRIPTION("LM87 driver"); | |
987 | MODULE_LICENSE("GPL"); | |
988 | ||
989 | module_init(sensors_lm87_init); | |
990 | module_exit(sensors_lm87_exit); |