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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
75static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
76
77enum chips { lm87, adm1024 };
78
79/*
80 * The LM87 registers
81 */
82
83/* nr in 0..5 */
84#define LM87_REG_IN(nr) (0x20 + (nr))
85#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
86#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
87/* nr in 0..1 */
88#define LM87_REG_AIN(nr) (0x28 + (nr))
89#define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
90#define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
91
92static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
93static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
94static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
95
96#define LM87_REG_TEMP_HW_INT_LOCK 0x13
97#define LM87_REG_TEMP_HW_EXT_LOCK 0x14
98#define LM87_REG_TEMP_HW_INT 0x17
99#define LM87_REG_TEMP_HW_EXT 0x18
100
101/* nr in 0..1 */
102#define LM87_REG_FAN(nr) (0x28 + (nr))
103#define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
104#define LM87_REG_AOUT 0x19
105
106#define LM87_REG_CONFIG 0x40
107#define LM87_REG_CHANNEL_MODE 0x16
108#define LM87_REG_VID_FAN_DIV 0x47
109#define LM87_REG_VID4 0x49
110
111#define LM87_REG_ALARMS1 0x41
112#define LM87_REG_ALARMS2 0x42
113
114#define LM87_REG_COMPANY_ID 0x3E
115#define LM87_REG_REVISION 0x3F
116
117/*
118 * Conversions and various macros
119 * The LM87 uses signed 8-bit values for temperatures.
120 */
121
122#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
123#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
124 (val) * 192 >= (scale) * 255 ? 255 : \
125 ((val) * 192 + (scale)/2) / (scale))
126
127#define TEMP_FROM_REG(reg) ((reg) * 1000)
128#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
129 (val) >= 126500 ? 127 : \
130 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
131
132#define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \
133 (1350000 + (reg)*(div) / 2) / ((reg)*(div)))
134#define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \
135 (1350000 + (val)*(div) / 2) / ((val)*(div)))
136
137#define FAN_DIV_FROM_REG(reg) (1 << (reg))
138
139/* analog out is 9.80mV/LSB */
140#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
141#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
142 (val) >= 2500 ? 255 : \
143 ((val) * 10 + 49) / 98)
144
145/* nr in 0..1 */
146#define CHAN_NO_FAN(nr) (1 << (nr))
147#define CHAN_TEMP3 (1 << 2)
148#define CHAN_VCC_5V (1 << 3)
149#define CHAN_NO_VID (1 << 7)
150
151/*
152 * Functions declaration
153 */
154
155static int lm87_probe(struct i2c_client *client,
156 const struct i2c_device_id *id);
157static int lm87_detect(struct i2c_client *new_client,
158 struct i2c_board_info *info);
159static void lm87_init_client(struct i2c_client *client);
160static int lm87_remove(struct i2c_client *client);
161static struct lm87_data *lm87_update_device(struct device *dev);
162
163/*
164 * Driver data (common to all clients)
165 */
166
167static const struct i2c_device_id lm87_id[] = {
168 { "lm87", lm87 },
169 { "adm1024", adm1024 },
170 { }
171};
172MODULE_DEVICE_TABLE(i2c, lm87_id);
173
174static struct i2c_driver lm87_driver = {
175 .class = I2C_CLASS_HWMON,
176 .driver = {
177 .name = "lm87",
178 },
179 .probe = lm87_probe,
180 .remove = lm87_remove,
181 .id_table = lm87_id,
182 .detect = lm87_detect,
183 .address_list = normal_i2c,
184};
185
186/*
187 * Client data (each client gets its own)
188 */
189
190struct lm87_data {
191 struct device *hwmon_dev;
192 struct mutex update_lock;
193 char valid; /* zero until following fields are valid */
194 unsigned long last_updated; /* In jiffies */
195
196 u8 channel; /* register value */
197 u8 config; /* original register value */
198
199 u8 in[8]; /* register value */
200 u8 in_max[8]; /* register value */
201 u8 in_min[8]; /* register value */
202 u16 in_scale[8];
203
204 s8 temp[3]; /* register value */
205 s8 temp_high[3]; /* register value */
206 s8 temp_low[3]; /* register value */
207 s8 temp_crit_int; /* min of two register values */
208 s8 temp_crit_ext; /* min of two register values */
209
210 u8 fan[2]; /* register value */
211 u8 fan_min[2]; /* register value */
212 u8 fan_div[2]; /* register value, shifted right */
213 u8 aout; /* register value */
214
215 u16 alarms; /* register values, combined */
216 u8 vid; /* register values, combined */
217 u8 vrm;
218};
219
220/*
221 * Sysfs stuff
222 */
223
224static inline int lm87_read_value(struct i2c_client *client, u8 reg)
225{
226 return i2c_smbus_read_byte_data(client, reg);
227}
228
229static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
230{
231 return i2c_smbus_write_byte_data(client, reg, value);
232}
233
234#define show_in(offset) \
235static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
236{ \
237 struct lm87_data *data = lm87_update_device(dev); \
238 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
239 data->in_scale[offset])); \
240} \
241static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
242{ \
243 struct lm87_data *data = lm87_update_device(dev); \
244 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
245 data->in_scale[offset])); \
246} \
247static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
248{ \
249 struct lm87_data *data = lm87_update_device(dev); \
250 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
251 data->in_scale[offset])); \
252} \
253static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
254 show_in##offset##_input, NULL);
255show_in(0);
256show_in(1);
257show_in(2);
258show_in(3);
259show_in(4);
260show_in(5);
261show_in(6);
262show_in(7);
263
264static void set_in_min(struct device *dev, const char *buf, int nr)
265{
266 struct i2c_client *client = to_i2c_client(dev);
267 struct lm87_data *data = i2c_get_clientdata(client);
268 long val = simple_strtol(buf, NULL, 10);
269
270 mutex_lock(&data->update_lock);
271 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
272 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) :
273 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]);
274 mutex_unlock(&data->update_lock);
275}
276
277static void set_in_max(struct device *dev, const char *buf, int nr)
278{
279 struct i2c_client *client = to_i2c_client(dev);
280 struct lm87_data *data = i2c_get_clientdata(client);
281 long val = simple_strtol(buf, NULL, 10);
282
283 mutex_lock(&data->update_lock);
284 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
285 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) :
286 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]);
287 mutex_unlock(&data->update_lock);
288}
289
290#define set_in(offset) \
291static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
292 const char *buf, size_t count) \
293{ \
294 set_in_min(dev, buf, offset); \
295 return count; \
296} \
297static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
298 const char *buf, size_t count) \
299{ \
300 set_in_max(dev, buf, offset); \
301 return count; \
302} \
303static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
304 show_in##offset##_min, set_in##offset##_min); \
305static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
306 show_in##offset##_max, set_in##offset##_max);
307set_in(0);
308set_in(1);
309set_in(2);
310set_in(3);
311set_in(4);
312set_in(5);
313set_in(6);
314set_in(7);
315
316#define show_temp(offset) \
317static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
318{ \
319 struct lm87_data *data = lm87_update_device(dev); \
320 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
321} \
322static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
323{ \
324 struct lm87_data *data = lm87_update_device(dev); \
325 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
326} \
327static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
328{ \
329 struct lm87_data *data = lm87_update_device(dev); \
330 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
331}\
332static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
333 show_temp##offset##_input, NULL);
334show_temp(1);
335show_temp(2);
336show_temp(3);
337
338static void set_temp_low(struct device *dev, const char *buf, int nr)
339{
340 struct i2c_client *client = to_i2c_client(dev);
341 struct lm87_data *data = i2c_get_clientdata(client);
342 long val = simple_strtol(buf, NULL, 10);
343
344 mutex_lock(&data->update_lock);
345 data->temp_low[nr] = TEMP_TO_REG(val);
346 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
347 mutex_unlock(&data->update_lock);
348}
349
350static void set_temp_high(struct device *dev, const char *buf, int nr)
351{
352 struct i2c_client *client = to_i2c_client(dev);
353 struct lm87_data *data = i2c_get_clientdata(client);
354 long val = simple_strtol(buf, NULL, 10);
355
356 mutex_lock(&data->update_lock);
357 data->temp_high[nr] = TEMP_TO_REG(val);
358 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
359 mutex_unlock(&data->update_lock);
360}
361
362#define set_temp(offset) \
363static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
364 const char *buf, size_t count) \
365{ \
366 set_temp_low(dev, buf, offset-1); \
367 return count; \
368} \
369static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
370 const char *buf, size_t count) \
371{ \
372 set_temp_high(dev, buf, offset-1); \
373 return count; \
374} \
375static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
376 show_temp##offset##_high, set_temp##offset##_high); \
377static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
378 show_temp##offset##_low, set_temp##offset##_low);
379set_temp(1);
380set_temp(2);
381set_temp(3);
382
383static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf)
384{
385 struct lm87_data *data = lm87_update_device(dev);
386 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
387}
388
389static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf)
390{
391 struct lm87_data *data = lm87_update_device(dev);
392 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
393}
394
395static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
396static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
397static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
398
399#define show_fan(offset) \
400static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
401{ \
402 struct lm87_data *data = lm87_update_device(dev); \
403 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
404 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
405} \
406static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
407{ \
408 struct lm87_data *data = lm87_update_device(dev); \
409 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
410 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
411} \
412static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
413{ \
414 struct lm87_data *data = lm87_update_device(dev); \
415 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
416} \
417static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
418 show_fan##offset##_input, NULL);
419show_fan(1);
420show_fan(2);
421
422static void set_fan_min(struct device *dev, const char *buf, int nr)
423{
424 struct i2c_client *client = to_i2c_client(dev);
425 struct lm87_data *data = i2c_get_clientdata(client);
426 long val = simple_strtol(buf, NULL, 10);
427
428 mutex_lock(&data->update_lock);
429 data->fan_min[nr] = FAN_TO_REG(val,
430 FAN_DIV_FROM_REG(data->fan_div[nr]));
431 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
432 mutex_unlock(&data->update_lock);
433}
434
435/* Note: we save and restore the fan minimum here, because its value is
436 determined in part by the fan clock divider. This follows the principle
437 of least surprise; the user doesn't expect the fan minimum to change just
438 because the divider changed. */
439static ssize_t set_fan_div(struct device *dev, const char *buf,
440 size_t count, int nr)
441{
442 struct i2c_client *client = to_i2c_client(dev);
443 struct lm87_data *data = i2c_get_clientdata(client);
444 long val = simple_strtol(buf, NULL, 10);
445 unsigned long min;
446 u8 reg;
447
448 mutex_lock(&data->update_lock);
449 min = FAN_FROM_REG(data->fan_min[nr],
450 FAN_DIV_FROM_REG(data->fan_div[nr]));
451
452 switch (val) {
453 case 1: data->fan_div[nr] = 0; break;
454 case 2: data->fan_div[nr] = 1; break;
455 case 4: data->fan_div[nr] = 2; break;
456 case 8: data->fan_div[nr] = 3; break;
457 default:
458 mutex_unlock(&data->update_lock);
459 return -EINVAL;
460 }
461
462 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
463 switch (nr) {
464 case 0:
465 reg = (reg & 0xCF) | (data->fan_div[0] << 4);
466 break;
467 case 1:
468 reg = (reg & 0x3F) | (data->fan_div[1] << 6);
469 break;
470 }
471 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
472
473 data->fan_min[nr] = FAN_TO_REG(min, val);
474 lm87_write_value(client, LM87_REG_FAN_MIN(nr),
475 data->fan_min[nr]);
476 mutex_unlock(&data->update_lock);
477
478 return count;
479}
480
481#define set_fan(offset) \
482static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
483 size_t count) \
484{ \
485 set_fan_min(dev, buf, offset-1); \
486 return count; \
487} \
488static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
489 size_t count) \
490{ \
491 return set_fan_div(dev, buf, count, offset-1); \
492} \
493static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
494 show_fan##offset##_min, set_fan##offset##_min); \
495static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
496 show_fan##offset##_div, set_fan##offset##_div);
497set_fan(1);
498set_fan(2);
499
500static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
501{
502 struct lm87_data *data = lm87_update_device(dev);
503 return sprintf(buf, "%d\n", data->alarms);
504}
505static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
506
507static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
508{
509 struct lm87_data *data = lm87_update_device(dev);
510 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
511}
512static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
513
514static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
515{
516 struct lm87_data *data = dev_get_drvdata(dev);
517 return sprintf(buf, "%d\n", data->vrm);
518}
519static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
520{
521 struct lm87_data *data = dev_get_drvdata(dev);
522 data->vrm = simple_strtoul(buf, NULL, 10);
523 return count;
524}
525static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
526
527static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf)
528{
529 struct lm87_data *data = lm87_update_device(dev);
530 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
531}
532static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
533{
534 struct i2c_client *client = to_i2c_client(dev);
535 struct lm87_data *data = i2c_get_clientdata(client);
536 long val = simple_strtol(buf, NULL, 10);
537
538 mutex_lock(&data->update_lock);
539 data->aout = AOUT_TO_REG(val);
540 lm87_write_value(client, LM87_REG_AOUT, data->aout);
541 mutex_unlock(&data->update_lock);
542 return count;
543}
544static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
545
546static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
547 char *buf)
548{
549 struct lm87_data *data = lm87_update_device(dev);
550 int bitnr = to_sensor_dev_attr(attr)->index;
551 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
552}
553static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
554static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
555static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
556static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
557static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
558static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
559static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
560static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
561static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
562static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
563static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5);
564static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
565static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
566static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14);
567static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
568
569/*
570 * Real code
571 */
572
573static struct attribute *lm87_attributes[] = {
574 &dev_attr_in1_input.attr,
575 &dev_attr_in1_min.attr,
576 &dev_attr_in1_max.attr,
577 &sensor_dev_attr_in1_alarm.dev_attr.attr,
578 &dev_attr_in2_input.attr,
579 &dev_attr_in2_min.attr,
580 &dev_attr_in2_max.attr,
581 &sensor_dev_attr_in2_alarm.dev_attr.attr,
582 &dev_attr_in3_input.attr,
583 &dev_attr_in3_min.attr,
584 &dev_attr_in3_max.attr,
585 &sensor_dev_attr_in3_alarm.dev_attr.attr,
586 &dev_attr_in4_input.attr,
587 &dev_attr_in4_min.attr,
588 &dev_attr_in4_max.attr,
589 &sensor_dev_attr_in4_alarm.dev_attr.attr,
590
591 &dev_attr_temp1_input.attr,
592 &dev_attr_temp1_max.attr,
593 &dev_attr_temp1_min.attr,
594 &dev_attr_temp1_crit.attr,
595 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
596 &dev_attr_temp2_input.attr,
597 &dev_attr_temp2_max.attr,
598 &dev_attr_temp2_min.attr,
599 &dev_attr_temp2_crit.attr,
600 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
601 &sensor_dev_attr_temp2_fault.dev_attr.attr,
602
603 &dev_attr_alarms.attr,
604 &dev_attr_aout_output.attr,
605
606 NULL
607};
608
609static const struct attribute_group lm87_group = {
610 .attrs = lm87_attributes,
611};
612
613static struct attribute *lm87_attributes_opt[] = {
614 &dev_attr_in6_input.attr,
615 &dev_attr_in6_min.attr,
616 &dev_attr_in6_max.attr,
617 &sensor_dev_attr_in6_alarm.dev_attr.attr,
618
619 &dev_attr_fan1_input.attr,
620 &dev_attr_fan1_min.attr,
621 &dev_attr_fan1_div.attr,
622 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
623
624 &dev_attr_in7_input.attr,
625 &dev_attr_in7_min.attr,
626 &dev_attr_in7_max.attr,
627 &sensor_dev_attr_in7_alarm.dev_attr.attr,
628
629 &dev_attr_fan2_input.attr,
630 &dev_attr_fan2_min.attr,
631 &dev_attr_fan2_div.attr,
632 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
633
634 &dev_attr_temp3_input.attr,
635 &dev_attr_temp3_max.attr,
636 &dev_attr_temp3_min.attr,
637 &dev_attr_temp3_crit.attr,
638 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
639 &sensor_dev_attr_temp3_fault.dev_attr.attr,
640
641 &dev_attr_in0_input.attr,
642 &dev_attr_in0_min.attr,
643 &dev_attr_in0_max.attr,
644 &sensor_dev_attr_in0_alarm.dev_attr.attr,
645 &dev_attr_in5_input.attr,
646 &dev_attr_in5_min.attr,
647 &dev_attr_in5_max.attr,
648 &sensor_dev_attr_in5_alarm.dev_attr.attr,
649
650 &dev_attr_cpu0_vid.attr,
651 &dev_attr_vrm.attr,
652
653 NULL
654};
655
656static const struct attribute_group lm87_group_opt = {
657 .attrs = lm87_attributes_opt,
658};
659
660/* Return 0 if detection is successful, -ENODEV otherwise */
661static int lm87_detect(struct i2c_client *new_client,
662 struct i2c_board_info *info)
663{
664 struct i2c_adapter *adapter = new_client->adapter;
665 const char *name;
666 u8 cid, rev;
667
668 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
669 return -ENODEV;
670
671 if (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)
672 return -ENODEV;
673
674 /* Now, we do the remaining detection. */
675 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID);
676 rev = lm87_read_value(new_client, LM87_REG_REVISION);
677
678 if (cid == 0x02 /* National Semiconductor */
679 && (rev >= 0x01 && rev <= 0x08))
680 name = "lm87";
681 else if (cid == 0x41 /* Analog Devices */
682 && (rev & 0xf0) == 0x10)
683 name = "adm1024";
684 else {
685 dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n",
686 new_client->addr);
687 return -ENODEV;
688 }
689
690 strlcpy(info->type, name, I2C_NAME_SIZE);
691
692 return 0;
693}
694
695static int lm87_probe(struct i2c_client *new_client,
696 const struct i2c_device_id *id)
697{
698 struct lm87_data *data;
699 int err;
700
701 data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL);
702 if (!data) {
703 err = -ENOMEM;
704 goto exit;
705 }
706
707 i2c_set_clientdata(new_client, data);
708 data->valid = 0;
709 mutex_init(&data->update_lock);
710
711 /* Initialize the LM87 chip */
712 lm87_init_client(new_client);
713
714 data->in_scale[0] = 2500;
715 data->in_scale[1] = 2700;
716 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
717 data->in_scale[3] = 5000;
718 data->in_scale[4] = 12000;
719 data->in_scale[5] = 2700;
720 data->in_scale[6] = 1875;
721 data->in_scale[7] = 1875;
722
723 /* Register sysfs hooks */
724 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
725 goto exit_free;
726
727 if (data->channel & CHAN_NO_FAN(0)) {
728 if ((err = device_create_file(&new_client->dev,
729 &dev_attr_in6_input))
730 || (err = device_create_file(&new_client->dev,
731 &dev_attr_in6_min))
732 || (err = device_create_file(&new_client->dev,
733 &dev_attr_in6_max))
734 || (err = device_create_file(&new_client->dev,
735 &sensor_dev_attr_in6_alarm.dev_attr)))
736 goto exit_remove;
737 } else {
738 if ((err = device_create_file(&new_client->dev,
739 &dev_attr_fan1_input))
740 || (err = device_create_file(&new_client->dev,
741 &dev_attr_fan1_min))
742 || (err = device_create_file(&new_client->dev,
743 &dev_attr_fan1_div))
744 || (err = device_create_file(&new_client->dev,
745 &sensor_dev_attr_fan1_alarm.dev_attr)))
746 goto exit_remove;
747 }
748
749 if (data->channel & CHAN_NO_FAN(1)) {
750 if ((err = device_create_file(&new_client->dev,
751 &dev_attr_in7_input))
752 || (err = device_create_file(&new_client->dev,
753 &dev_attr_in7_min))
754 || (err = device_create_file(&new_client->dev,
755 &dev_attr_in7_max))
756 || (err = device_create_file(&new_client->dev,
757 &sensor_dev_attr_in7_alarm.dev_attr)))
758 goto exit_remove;
759 } else {
760 if ((err = device_create_file(&new_client->dev,
761 &dev_attr_fan2_input))
762 || (err = device_create_file(&new_client->dev,
763 &dev_attr_fan2_min))
764 || (err = device_create_file(&new_client->dev,
765 &dev_attr_fan2_div))
766 || (err = device_create_file(&new_client->dev,
767 &sensor_dev_attr_fan2_alarm.dev_attr)))
768 goto exit_remove;
769 }
770
771 if (data->channel & CHAN_TEMP3) {
772 if ((err = device_create_file(&new_client->dev,
773 &dev_attr_temp3_input))
774 || (err = device_create_file(&new_client->dev,
775 &dev_attr_temp3_max))
776 || (err = device_create_file(&new_client->dev,
777 &dev_attr_temp3_min))
778 || (err = device_create_file(&new_client->dev,
779 &dev_attr_temp3_crit))
780 || (err = device_create_file(&new_client->dev,
781 &sensor_dev_attr_temp3_alarm.dev_attr))
782 || (err = device_create_file(&new_client->dev,
783 &sensor_dev_attr_temp3_fault.dev_attr)))
784 goto exit_remove;
785 } else {
786 if ((err = device_create_file(&new_client->dev,
787 &dev_attr_in0_input))
788 || (err = device_create_file(&new_client->dev,
789 &dev_attr_in0_min))
790 || (err = device_create_file(&new_client->dev,
791 &dev_attr_in0_max))
792 || (err = device_create_file(&new_client->dev,
793 &sensor_dev_attr_in0_alarm.dev_attr))
794 || (err = device_create_file(&new_client->dev,
795 &dev_attr_in5_input))
796 || (err = device_create_file(&new_client->dev,
797 &dev_attr_in5_min))
798 || (err = device_create_file(&new_client->dev,
799 &dev_attr_in5_max))
800 || (err = device_create_file(&new_client->dev,
801 &sensor_dev_attr_in5_alarm.dev_attr)))
802 goto exit_remove;
803 }
804
805 if (!(data->channel & CHAN_NO_VID)) {
806 data->vrm = vid_which_vrm();
807 if ((err = device_create_file(&new_client->dev,
808 &dev_attr_cpu0_vid))
809 || (err = device_create_file(&new_client->dev,
810 &dev_attr_vrm)))
811 goto exit_remove;
812 }
813
814 data->hwmon_dev = hwmon_device_register(&new_client->dev);
815 if (IS_ERR(data->hwmon_dev)) {
816 err = PTR_ERR(data->hwmon_dev);
817 goto exit_remove;
818 }
819
820 return 0;
821
822exit_remove:
823 sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
824 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
825exit_free:
826 lm87_write_value(new_client, LM87_REG_CONFIG, data->config);
827 kfree(data);
828exit:
829 return err;
830}
831
832static void lm87_init_client(struct i2c_client *client)
833{
834 struct lm87_data *data = i2c_get_clientdata(client);
835
836 if (client->dev.platform_data) {
837 data->channel = *(u8 *)client->dev.platform_data;
838 lm87_write_value(client,
839 LM87_REG_CHANNEL_MODE, data->channel);
840 } else {
841 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
842 }
843 data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
844
845 if (!(data->config & 0x01)) {
846 int i;
847
848 /* Limits are left uninitialized after power-up */
849 for (i = 1; i < 6; i++) {
850 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
851 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
852 }
853 for (i = 0; i < 2; i++) {
854 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
855 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
856 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
857 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
858 }
859 if (data->channel & CHAN_TEMP3) {
860 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
861 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
862 } else {
863 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
864 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
865 }
866 }
867
868 /* Make sure Start is set and INT#_Clear is clear */
869 if ((data->config & 0x09) != 0x01)
870 lm87_write_value(client, LM87_REG_CONFIG,
871 (data->config & 0x77) | 0x01);
872}
873
874static int lm87_remove(struct i2c_client *client)
875{
876 struct lm87_data *data = i2c_get_clientdata(client);
877
878 hwmon_device_unregister(data->hwmon_dev);
879 sysfs_remove_group(&client->dev.kobj, &lm87_group);
880 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
881
882 lm87_write_value(client, LM87_REG_CONFIG, data->config);
883 kfree(data);
884 return 0;
885}
886
887static struct lm87_data *lm87_update_device(struct device *dev)
888{
889 struct i2c_client *client = to_i2c_client(dev);
890 struct lm87_data *data = i2c_get_clientdata(client);
891
892 mutex_lock(&data->update_lock);
893
894 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
895 int i, j;
896
897 dev_dbg(&client->dev, "Updating data.\n");
898
899 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
900 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
901 for (; i < j; i++) {
902 data->in[i] = lm87_read_value(client,
903 LM87_REG_IN(i));
904 data->in_min[i] = lm87_read_value(client,
905 LM87_REG_IN_MIN(i));
906 data->in_max[i] = lm87_read_value(client,
907 LM87_REG_IN_MAX(i));
908 }
909
910 for (i = 0; i < 2; i++) {
911 if (data->channel & CHAN_NO_FAN(i)) {
912 data->in[6+i] = lm87_read_value(client,
913 LM87_REG_AIN(i));
914 data->in_max[6+i] = lm87_read_value(client,
915 LM87_REG_AIN_MAX(i));
916 data->in_min[6+i] = lm87_read_value(client,
917 LM87_REG_AIN_MIN(i));
918
919 } else {
920 data->fan[i] = lm87_read_value(client,
921 LM87_REG_FAN(i));
922 data->fan_min[i] = lm87_read_value(client,
923 LM87_REG_FAN_MIN(i));
924 }
925 }
926
927 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
928 for (i = 0 ; i < j; i++) {
929 data->temp[i] = lm87_read_value(client,
930 LM87_REG_TEMP[i]);
931 data->temp_high[i] = lm87_read_value(client,
932 LM87_REG_TEMP_HIGH[i]);
933 data->temp_low[i] = lm87_read_value(client,
934 LM87_REG_TEMP_LOW[i]);
935 }
936
937 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
938 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
939 data->temp_crit_int = min(i, j);
940
941 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
942 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
943 data->temp_crit_ext = min(i, j);
944
945 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
946 data->fan_div[0] = (i >> 4) & 0x03;
947 data->fan_div[1] = (i >> 6) & 0x03;
948 data->vid = (i & 0x0F)
949 | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
950 << 4;
951
952 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
953 | (lm87_read_value(client, LM87_REG_ALARMS2)
954 << 8);
955 data->aout = lm87_read_value(client, LM87_REG_AOUT);
956
957 data->last_updated = jiffies;
958 data->valid = 1;
959 }
960
961 mutex_unlock(&data->update_lock);
962
963 return data;
964}
965
966static int __init sensors_lm87_init(void)
967{
968 return i2c_add_driver(&lm87_driver);
969}
970
971static void __exit sensors_lm87_exit(void)
972{
973 i2c_del_driver(&lm87_driver);
974}
975
976MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
977MODULE_DESCRIPTION("LM87 driver");
978MODULE_LICENSE("GPL");
979
980module_init(sensors_lm87_init);
981module_exit(sensors_lm87_exit);
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 <jdelvare@suse.de>
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
75static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
76
77enum chips { lm87, adm1024 };
78
79/*
80 * The LM87 registers
81 */
82
83/* nr in 0..5 */
84#define LM87_REG_IN(nr) (0x20 + (nr))
85#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
86#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
87/* nr in 0..1 */
88#define LM87_REG_AIN(nr) (0x28 + (nr))
89#define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
90#define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
91
92static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
93static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
94static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
95
96#define LM87_REG_TEMP_HW_INT_LOCK 0x13
97#define LM87_REG_TEMP_HW_EXT_LOCK 0x14
98#define LM87_REG_TEMP_HW_INT 0x17
99#define LM87_REG_TEMP_HW_EXT 0x18
100
101/* nr in 0..1 */
102#define LM87_REG_FAN(nr) (0x28 + (nr))
103#define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
104#define LM87_REG_AOUT 0x19
105
106#define LM87_REG_CONFIG 0x40
107#define LM87_REG_CHANNEL_MODE 0x16
108#define LM87_REG_VID_FAN_DIV 0x47
109#define LM87_REG_VID4 0x49
110
111#define LM87_REG_ALARMS1 0x41
112#define LM87_REG_ALARMS2 0x42
113
114#define LM87_REG_COMPANY_ID 0x3E
115#define LM87_REG_REVISION 0x3F
116
117/*
118 * Conversions and various macros
119 * The LM87 uses signed 8-bit values for temperatures.
120 */
121
122#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
123#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \
124 (val) >= (scale) * 255 / 192 ? 255 : \
125 ((val) * 192 + (scale) / 2) / (scale))
126
127#define TEMP_FROM_REG(reg) ((reg) * 1000)
128#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
129 (val) >= 126500 ? 127 : \
130 (((val) < 0 ? (val) - 500 : \
131 (val) + 500) / 1000))
132
133#define FAN_FROM_REG(reg, div) ((reg) == 255 || (reg) == 0 ? 0 : \
134 (1350000 + (reg)*(div) / 2) / ((reg) * (div)))
135#define FAN_TO_REG(val, div) ((val) * (div) * 255 <= 1350000 ? 255 : \
136 (1350000 + (val)*(div) / 2) / ((val) * (div)))
137
138#define FAN_DIV_FROM_REG(reg) (1 << (reg))
139
140/* analog out is 9.80mV/LSB */
141#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
142#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
143 (val) >= 2500 ? 255 : \
144 ((val) * 10 + 49) / 98)
145
146/* nr in 0..1 */
147#define CHAN_NO_FAN(nr) (1 << (nr))
148#define CHAN_TEMP3 (1 << 2)
149#define CHAN_VCC_5V (1 << 3)
150#define CHAN_NO_VID (1 << 7)
151
152/*
153 * Client data (each client gets its own)
154 */
155
156struct lm87_data {
157 struct mutex update_lock;
158 char valid; /* zero until following fields are valid */
159 unsigned long last_updated; /* In jiffies */
160
161 u8 channel; /* register value */
162 u8 config; /* original register value */
163
164 u8 in[8]; /* register value */
165 u8 in_max[8]; /* register value */
166 u8 in_min[8]; /* register value */
167 u16 in_scale[8];
168
169 s8 temp[3]; /* register value */
170 s8 temp_high[3]; /* register value */
171 s8 temp_low[3]; /* register value */
172 s8 temp_crit_int; /* min of two register values */
173 s8 temp_crit_ext; /* min of two register values */
174
175 u8 fan[2]; /* register value */
176 u8 fan_min[2]; /* register value */
177 u8 fan_div[2]; /* register value, shifted right */
178 u8 aout; /* register value */
179
180 u16 alarms; /* register values, combined */
181 u8 vid; /* register values, combined */
182 u8 vrm;
183
184 const struct attribute_group *attr_groups[6];
185};
186
187static inline int lm87_read_value(struct i2c_client *client, u8 reg)
188{
189 return i2c_smbus_read_byte_data(client, reg);
190}
191
192static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
193{
194 return i2c_smbus_write_byte_data(client, reg, value);
195}
196
197static struct lm87_data *lm87_update_device(struct device *dev)
198{
199 struct i2c_client *client = dev_get_drvdata(dev);
200 struct lm87_data *data = i2c_get_clientdata(client);
201
202 mutex_lock(&data->update_lock);
203
204 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
205 int i, j;
206
207 dev_dbg(&client->dev, "Updating data.\n");
208
209 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
210 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
211 for (; i < j; i++) {
212 data->in[i] = lm87_read_value(client,
213 LM87_REG_IN(i));
214 data->in_min[i] = lm87_read_value(client,
215 LM87_REG_IN_MIN(i));
216 data->in_max[i] = lm87_read_value(client,
217 LM87_REG_IN_MAX(i));
218 }
219
220 for (i = 0; i < 2; i++) {
221 if (data->channel & CHAN_NO_FAN(i)) {
222 data->in[6+i] = lm87_read_value(client,
223 LM87_REG_AIN(i));
224 data->in_max[6+i] = lm87_read_value(client,
225 LM87_REG_AIN_MAX(i));
226 data->in_min[6+i] = lm87_read_value(client,
227 LM87_REG_AIN_MIN(i));
228
229 } else {
230 data->fan[i] = lm87_read_value(client,
231 LM87_REG_FAN(i));
232 data->fan_min[i] = lm87_read_value(client,
233 LM87_REG_FAN_MIN(i));
234 }
235 }
236
237 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
238 for (i = 0 ; i < j; i++) {
239 data->temp[i] = lm87_read_value(client,
240 LM87_REG_TEMP[i]);
241 data->temp_high[i] = lm87_read_value(client,
242 LM87_REG_TEMP_HIGH[i]);
243 data->temp_low[i] = lm87_read_value(client,
244 LM87_REG_TEMP_LOW[i]);
245 }
246
247 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
248 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
249 data->temp_crit_int = min(i, j);
250
251 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
252 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
253 data->temp_crit_ext = min(i, j);
254
255 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
256 data->fan_div[0] = (i >> 4) & 0x03;
257 data->fan_div[1] = (i >> 6) & 0x03;
258 data->vid = (i & 0x0F)
259 | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
260 << 4;
261
262 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
263 | (lm87_read_value(client, LM87_REG_ALARMS2)
264 << 8);
265 data->aout = lm87_read_value(client, LM87_REG_AOUT);
266
267 data->last_updated = jiffies;
268 data->valid = 1;
269 }
270
271 mutex_unlock(&data->update_lock);
272
273 return data;
274}
275
276/*
277 * Sysfs stuff
278 */
279
280static ssize_t show_in_input(struct device *dev, struct device_attribute *attr,
281 char *buf)
282{
283 struct lm87_data *data = lm87_update_device(dev);
284 int nr = to_sensor_dev_attr(attr)->index;
285
286 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[nr],
287 data->in_scale[nr]));
288}
289
290static ssize_t show_in_min(struct device *dev,
291 struct device_attribute *attr, char *buf)
292{
293 struct lm87_data *data = lm87_update_device(dev);
294 int nr = to_sensor_dev_attr(attr)->index;
295
296 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[nr],
297 data->in_scale[nr]));
298}
299
300static ssize_t show_in_max(struct device *dev,
301 struct device_attribute *attr, char *buf)
302{
303 struct lm87_data *data = lm87_update_device(dev);
304 int nr = to_sensor_dev_attr(attr)->index;
305
306 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[nr],
307 data->in_scale[nr]));
308}
309
310static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
311 const char *buf, size_t count)
312{
313 struct i2c_client *client = dev_get_drvdata(dev);
314 struct lm87_data *data = i2c_get_clientdata(client);
315 int nr = to_sensor_dev_attr(attr)->index;
316 long val;
317 int err;
318
319 err = kstrtol(buf, 10, &val);
320 if (err)
321 return err;
322
323 mutex_lock(&data->update_lock);
324 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
325 lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) :
326 LM87_REG_AIN_MIN(nr - 6), data->in_min[nr]);
327 mutex_unlock(&data->update_lock);
328 return count;
329}
330
331static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
332 const char *buf, size_t count)
333{
334 struct i2c_client *client = dev_get_drvdata(dev);
335 struct lm87_data *data = i2c_get_clientdata(client);
336 int nr = to_sensor_dev_attr(attr)->index;
337 long val;
338 int err;
339
340 err = kstrtol(buf, 10, &val);
341 if (err)
342 return err;
343
344 mutex_lock(&data->update_lock);
345 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
346 lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) :
347 LM87_REG_AIN_MAX(nr - 6), data->in_max[nr]);
348 mutex_unlock(&data->update_lock);
349 return count;
350}
351
352#define set_in(offset) \
353static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
354 show_in_input, NULL, offset); \
355static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
356 show_in_min, set_in_min, offset); \
357static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
358 show_in_max, set_in_max, offset)
359set_in(0);
360set_in(1);
361set_in(2);
362set_in(3);
363set_in(4);
364set_in(5);
365set_in(6);
366set_in(7);
367
368static ssize_t show_temp_input(struct device *dev,
369 struct device_attribute *attr, char *buf)
370{
371 struct lm87_data *data = lm87_update_device(dev);
372 int nr = to_sensor_dev_attr(attr)->index;
373
374 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
375}
376
377static ssize_t show_temp_low(struct device *dev,
378 struct device_attribute *attr, char *buf)
379{
380 struct lm87_data *data = lm87_update_device(dev);
381 int nr = to_sensor_dev_attr(attr)->index;
382
383 return sprintf(buf, "%d\n",
384 TEMP_FROM_REG(data->temp_low[nr]));
385}
386
387static ssize_t show_temp_high(struct device *dev,
388 struct device_attribute *attr, char *buf)
389{
390 struct lm87_data *data = lm87_update_device(dev);
391 int nr = to_sensor_dev_attr(attr)->index;
392
393 return sprintf(buf, "%d\n",
394 TEMP_FROM_REG(data->temp_high[nr]));
395}
396
397static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr,
398 const char *buf, size_t count)
399{
400 struct i2c_client *client = dev_get_drvdata(dev);
401 struct lm87_data *data = i2c_get_clientdata(client);
402 int nr = to_sensor_dev_attr(attr)->index;
403 long val;
404 int err;
405
406 err = kstrtol(buf, 10, &val);
407 if (err)
408 return err;
409
410 mutex_lock(&data->update_lock);
411 data->temp_low[nr] = TEMP_TO_REG(val);
412 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
413 mutex_unlock(&data->update_lock);
414 return count;
415}
416
417static ssize_t set_temp_high(struct device *dev, struct device_attribute *attr,
418 const char *buf, size_t count)
419{
420 struct i2c_client *client = dev_get_drvdata(dev);
421 struct lm87_data *data = i2c_get_clientdata(client);
422 int nr = to_sensor_dev_attr(attr)->index;
423 long val;
424 int err;
425
426 err = kstrtol(buf, 10, &val);
427 if (err)
428 return err;
429
430 mutex_lock(&data->update_lock);
431 data->temp_high[nr] = TEMP_TO_REG(val);
432 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
433 mutex_unlock(&data->update_lock);
434 return count;
435}
436
437#define set_temp(offset) \
438static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
439 show_temp_input, NULL, offset - 1); \
440static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
441 show_temp_high, set_temp_high, offset - 1); \
442static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
443 show_temp_low, set_temp_low, offset - 1)
444set_temp(1);
445set_temp(2);
446set_temp(3);
447
448static ssize_t show_temp_crit_int(struct device *dev,
449 struct device_attribute *attr, char *buf)
450{
451 struct lm87_data *data = lm87_update_device(dev);
452 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
453}
454
455static ssize_t show_temp_crit_ext(struct device *dev,
456 struct device_attribute *attr, char *buf)
457{
458 struct lm87_data *data = lm87_update_device(dev);
459 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
460}
461
462static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
463static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
464static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
465
466static ssize_t show_fan_input(struct device *dev,
467 struct device_attribute *attr, char *buf)
468{
469 struct lm87_data *data = lm87_update_device(dev);
470 int nr = to_sensor_dev_attr(attr)->index;
471
472 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
473 FAN_DIV_FROM_REG(data->fan_div[nr])));
474}
475
476static ssize_t show_fan_min(struct device *dev,
477 struct device_attribute *attr, char *buf)
478{
479 struct lm87_data *data = lm87_update_device(dev);
480 int nr = to_sensor_dev_attr(attr)->index;
481
482 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
483 FAN_DIV_FROM_REG(data->fan_div[nr])));
484}
485
486static ssize_t show_fan_div(struct device *dev,
487 struct device_attribute *attr, char *buf)
488{
489 struct lm87_data *data = lm87_update_device(dev);
490 int nr = to_sensor_dev_attr(attr)->index;
491
492 return sprintf(buf, "%d\n",
493 FAN_DIV_FROM_REG(data->fan_div[nr]));
494}
495
496static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
497 const char *buf, size_t count)
498{
499 struct i2c_client *client = dev_get_drvdata(dev);
500 struct lm87_data *data = i2c_get_clientdata(client);
501 int nr = to_sensor_dev_attr(attr)->index;
502 long val;
503 int err;
504
505 err = kstrtol(buf, 10, &val);
506 if (err)
507 return err;
508
509 mutex_lock(&data->update_lock);
510 data->fan_min[nr] = FAN_TO_REG(val,
511 FAN_DIV_FROM_REG(data->fan_div[nr]));
512 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
513 mutex_unlock(&data->update_lock);
514 return count;
515}
516
517/*
518 * Note: we save and restore the fan minimum here, because its value is
519 * determined in part by the fan clock divider. This follows the principle
520 * of least surprise; the user doesn't expect the fan minimum to change just
521 * because the divider changed.
522 */
523static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
524 const char *buf, size_t count)
525{
526 struct i2c_client *client = dev_get_drvdata(dev);
527 struct lm87_data *data = i2c_get_clientdata(client);
528 int nr = to_sensor_dev_attr(attr)->index;
529 long val;
530 int err;
531 unsigned long min;
532 u8 reg;
533
534 err = kstrtol(buf, 10, &val);
535 if (err)
536 return err;
537
538 mutex_lock(&data->update_lock);
539 min = FAN_FROM_REG(data->fan_min[nr],
540 FAN_DIV_FROM_REG(data->fan_div[nr]));
541
542 switch (val) {
543 case 1:
544 data->fan_div[nr] = 0;
545 break;
546 case 2:
547 data->fan_div[nr] = 1;
548 break;
549 case 4:
550 data->fan_div[nr] = 2;
551 break;
552 case 8:
553 data->fan_div[nr] = 3;
554 break;
555 default:
556 mutex_unlock(&data->update_lock);
557 return -EINVAL;
558 }
559
560 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
561 switch (nr) {
562 case 0:
563 reg = (reg & 0xCF) | (data->fan_div[0] << 4);
564 break;
565 case 1:
566 reg = (reg & 0x3F) | (data->fan_div[1] << 6);
567 break;
568 }
569 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
570
571 data->fan_min[nr] = FAN_TO_REG(min, val);
572 lm87_write_value(client, LM87_REG_FAN_MIN(nr),
573 data->fan_min[nr]);
574 mutex_unlock(&data->update_lock);
575
576 return count;
577}
578
579#define set_fan(offset) \
580static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
581 show_fan_input, NULL, offset - 1); \
582static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
583 show_fan_min, set_fan_min, offset - 1); \
584static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
585 show_fan_div, set_fan_div, offset - 1)
586set_fan(1);
587set_fan(2);
588
589static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
590 char *buf)
591{
592 struct lm87_data *data = lm87_update_device(dev);
593 return sprintf(buf, "%d\n", data->alarms);
594}
595static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
596
597static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
598 char *buf)
599{
600 struct lm87_data *data = lm87_update_device(dev);
601 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
602}
603static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
604
605static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 struct lm87_data *data = dev_get_drvdata(dev);
609 return sprintf(buf, "%d\n", data->vrm);
610}
611static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
612 const char *buf, size_t count)
613{
614 struct lm87_data *data = dev_get_drvdata(dev);
615 unsigned long val;
616 int err;
617
618 err = kstrtoul(buf, 10, &val);
619 if (err)
620 return err;
621
622 if (val > 255)
623 return -EINVAL;
624
625 data->vrm = val;
626 return count;
627}
628static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
629
630static ssize_t show_aout(struct device *dev, struct device_attribute *attr,
631 char *buf)
632{
633 struct lm87_data *data = lm87_update_device(dev);
634 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
635}
636static ssize_t set_aout(struct device *dev, struct device_attribute *attr,
637 const char *buf, size_t count)
638{
639 struct i2c_client *client = dev_get_drvdata(dev);
640 struct lm87_data *data = i2c_get_clientdata(client);
641 long val;
642 int err;
643
644 err = kstrtol(buf, 10, &val);
645 if (err)
646 return err;
647
648 mutex_lock(&data->update_lock);
649 data->aout = AOUT_TO_REG(val);
650 lm87_write_value(client, LM87_REG_AOUT, data->aout);
651 mutex_unlock(&data->update_lock);
652 return count;
653}
654static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
655
656static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
657 char *buf)
658{
659 struct lm87_data *data = lm87_update_device(dev);
660 int bitnr = to_sensor_dev_attr(attr)->index;
661 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
662}
663static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
664static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
665static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
666static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
667static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
668static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
669static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
670static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
671static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
672static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
673static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5);
674static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
675static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
676static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14);
677static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
678
679/*
680 * Real code
681 */
682
683static struct attribute *lm87_attributes[] = {
684 &sensor_dev_attr_in1_input.dev_attr.attr,
685 &sensor_dev_attr_in1_min.dev_attr.attr,
686 &sensor_dev_attr_in1_max.dev_attr.attr,
687 &sensor_dev_attr_in1_alarm.dev_attr.attr,
688 &sensor_dev_attr_in2_input.dev_attr.attr,
689 &sensor_dev_attr_in2_min.dev_attr.attr,
690 &sensor_dev_attr_in2_max.dev_attr.attr,
691 &sensor_dev_attr_in2_alarm.dev_attr.attr,
692 &sensor_dev_attr_in3_input.dev_attr.attr,
693 &sensor_dev_attr_in3_min.dev_attr.attr,
694 &sensor_dev_attr_in3_max.dev_attr.attr,
695 &sensor_dev_attr_in3_alarm.dev_attr.attr,
696 &sensor_dev_attr_in4_input.dev_attr.attr,
697 &sensor_dev_attr_in4_min.dev_attr.attr,
698 &sensor_dev_attr_in4_max.dev_attr.attr,
699 &sensor_dev_attr_in4_alarm.dev_attr.attr,
700
701 &sensor_dev_attr_temp1_input.dev_attr.attr,
702 &sensor_dev_attr_temp1_max.dev_attr.attr,
703 &sensor_dev_attr_temp1_min.dev_attr.attr,
704 &dev_attr_temp1_crit.attr,
705 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
706 &sensor_dev_attr_temp2_input.dev_attr.attr,
707 &sensor_dev_attr_temp2_max.dev_attr.attr,
708 &sensor_dev_attr_temp2_min.dev_attr.attr,
709 &dev_attr_temp2_crit.attr,
710 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
711 &sensor_dev_attr_temp2_fault.dev_attr.attr,
712
713 &dev_attr_alarms.attr,
714 &dev_attr_aout_output.attr,
715
716 NULL
717};
718
719static const struct attribute_group lm87_group = {
720 .attrs = lm87_attributes,
721};
722
723static struct attribute *lm87_attributes_in6[] = {
724 &sensor_dev_attr_in6_input.dev_attr.attr,
725 &sensor_dev_attr_in6_min.dev_attr.attr,
726 &sensor_dev_attr_in6_max.dev_attr.attr,
727 &sensor_dev_attr_in6_alarm.dev_attr.attr,
728 NULL
729};
730
731static const struct attribute_group lm87_group_in6 = {
732 .attrs = lm87_attributes_in6,
733};
734
735static struct attribute *lm87_attributes_fan1[] = {
736 &sensor_dev_attr_fan1_input.dev_attr.attr,
737 &sensor_dev_attr_fan1_min.dev_attr.attr,
738 &sensor_dev_attr_fan1_div.dev_attr.attr,
739 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
740 NULL
741};
742
743static const struct attribute_group lm87_group_fan1 = {
744 .attrs = lm87_attributes_fan1,
745};
746
747static struct attribute *lm87_attributes_in7[] = {
748 &sensor_dev_attr_in7_input.dev_attr.attr,
749 &sensor_dev_attr_in7_min.dev_attr.attr,
750 &sensor_dev_attr_in7_max.dev_attr.attr,
751 &sensor_dev_attr_in7_alarm.dev_attr.attr,
752 NULL
753};
754
755static const struct attribute_group lm87_group_in7 = {
756 .attrs = lm87_attributes_in7,
757};
758
759static struct attribute *lm87_attributes_fan2[] = {
760 &sensor_dev_attr_fan2_input.dev_attr.attr,
761 &sensor_dev_attr_fan2_min.dev_attr.attr,
762 &sensor_dev_attr_fan2_div.dev_attr.attr,
763 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
764 NULL
765};
766
767static const struct attribute_group lm87_group_fan2 = {
768 .attrs = lm87_attributes_fan2,
769};
770
771static struct attribute *lm87_attributes_temp3[] = {
772 &sensor_dev_attr_temp3_input.dev_attr.attr,
773 &sensor_dev_attr_temp3_max.dev_attr.attr,
774 &sensor_dev_attr_temp3_min.dev_attr.attr,
775 &dev_attr_temp3_crit.attr,
776 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
777 &sensor_dev_attr_temp3_fault.dev_attr.attr,
778 NULL
779};
780
781static const struct attribute_group lm87_group_temp3 = {
782 .attrs = lm87_attributes_temp3,
783};
784
785static struct attribute *lm87_attributes_in0_5[] = {
786 &sensor_dev_attr_in0_input.dev_attr.attr,
787 &sensor_dev_attr_in0_min.dev_attr.attr,
788 &sensor_dev_attr_in0_max.dev_attr.attr,
789 &sensor_dev_attr_in0_alarm.dev_attr.attr,
790 &sensor_dev_attr_in5_input.dev_attr.attr,
791 &sensor_dev_attr_in5_min.dev_attr.attr,
792 &sensor_dev_attr_in5_max.dev_attr.attr,
793 &sensor_dev_attr_in5_alarm.dev_attr.attr,
794 NULL
795};
796
797static const struct attribute_group lm87_group_in0_5 = {
798 .attrs = lm87_attributes_in0_5,
799};
800
801static struct attribute *lm87_attributes_vid[] = {
802 &dev_attr_cpu0_vid.attr,
803 &dev_attr_vrm.attr,
804 NULL
805};
806
807static const struct attribute_group lm87_group_vid = {
808 .attrs = lm87_attributes_vid,
809};
810
811/* Return 0 if detection is successful, -ENODEV otherwise */
812static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info)
813{
814 struct i2c_adapter *adapter = client->adapter;
815 const char *name;
816 u8 cid, rev;
817
818 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
819 return -ENODEV;
820
821 if (lm87_read_value(client, LM87_REG_CONFIG) & 0x80)
822 return -ENODEV;
823
824 /* Now, we do the remaining detection. */
825 cid = lm87_read_value(client, LM87_REG_COMPANY_ID);
826 rev = lm87_read_value(client, LM87_REG_REVISION);
827
828 if (cid == 0x02 /* National Semiconductor */
829 && (rev >= 0x01 && rev <= 0x08))
830 name = "lm87";
831 else if (cid == 0x41 /* Analog Devices */
832 && (rev & 0xf0) == 0x10)
833 name = "adm1024";
834 else {
835 dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n",
836 client->addr);
837 return -ENODEV;
838 }
839
840 strlcpy(info->type, name, I2C_NAME_SIZE);
841
842 return 0;
843}
844
845static void lm87_restore_config(void *arg)
846{
847 struct i2c_client *client = arg;
848 struct lm87_data *data = i2c_get_clientdata(client);
849
850 lm87_write_value(client, LM87_REG_CONFIG, data->config);
851}
852
853static int lm87_init_client(struct i2c_client *client)
854{
855 struct lm87_data *data = i2c_get_clientdata(client);
856 int rc;
857
858 if (dev_get_platdata(&client->dev)) {
859 data->channel = *(u8 *)dev_get_platdata(&client->dev);
860 lm87_write_value(client,
861 LM87_REG_CHANNEL_MODE, data->channel);
862 } else {
863 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
864 }
865 data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
866
867 rc = devm_add_action(&client->dev, lm87_restore_config, client);
868 if (rc)
869 return rc;
870
871 if (!(data->config & 0x01)) {
872 int i;
873
874 /* Limits are left uninitialized after power-up */
875 for (i = 1; i < 6; i++) {
876 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
877 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
878 }
879 for (i = 0; i < 2; i++) {
880 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
881 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
882 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
883 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
884 }
885 if (data->channel & CHAN_TEMP3) {
886 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
887 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
888 } else {
889 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
890 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
891 }
892 }
893
894 /* Make sure Start is set and INT#_Clear is clear */
895 if ((data->config & 0x09) != 0x01)
896 lm87_write_value(client, LM87_REG_CONFIG,
897 (data->config & 0x77) | 0x01);
898 return 0;
899}
900
901static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id)
902{
903 struct lm87_data *data;
904 struct device *hwmon_dev;
905 int err;
906 unsigned int group_tail = 0;
907
908 data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL);
909 if (!data)
910 return -ENOMEM;
911
912 i2c_set_clientdata(client, data);
913 mutex_init(&data->update_lock);
914
915 /* Initialize the LM87 chip */
916 err = lm87_init_client(client);
917 if (err)
918 return err;
919
920 data->in_scale[0] = 2500;
921 data->in_scale[1] = 2700;
922 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
923 data->in_scale[3] = 5000;
924 data->in_scale[4] = 12000;
925 data->in_scale[5] = 2700;
926 data->in_scale[6] = 1875;
927 data->in_scale[7] = 1875;
928
929 /*
930 * Construct the list of attributes, the list depends on the
931 * configuration of the chip
932 */
933 data->attr_groups[group_tail++] = &lm87_group;
934 if (data->channel & CHAN_NO_FAN(0))
935 data->attr_groups[group_tail++] = &lm87_group_in6;
936 else
937 data->attr_groups[group_tail++] = &lm87_group_fan1;
938
939 if (data->channel & CHAN_NO_FAN(1))
940 data->attr_groups[group_tail++] = &lm87_group_in7;
941 else
942 data->attr_groups[group_tail++] = &lm87_group_fan2;
943
944 if (data->channel & CHAN_TEMP3)
945 data->attr_groups[group_tail++] = &lm87_group_temp3;
946 else
947 data->attr_groups[group_tail++] = &lm87_group_in0_5;
948
949 if (!(data->channel & CHAN_NO_VID)) {
950 data->vrm = vid_which_vrm();
951 data->attr_groups[group_tail++] = &lm87_group_vid;
952 }
953
954 hwmon_dev = devm_hwmon_device_register_with_groups(
955 &client->dev, client->name, client, data->attr_groups);
956 return PTR_ERR_OR_ZERO(hwmon_dev);
957}
958
959/*
960 * Driver data (common to all clients)
961 */
962
963static const struct i2c_device_id lm87_id[] = {
964 { "lm87", lm87 },
965 { "adm1024", adm1024 },
966 { }
967};
968MODULE_DEVICE_TABLE(i2c, lm87_id);
969
970static struct i2c_driver lm87_driver = {
971 .class = I2C_CLASS_HWMON,
972 .driver = {
973 .name = "lm87",
974 },
975 .probe = lm87_probe,
976 .id_table = lm87_id,
977 .detect = lm87_detect,
978 .address_list = normal_i2c,
979};
980
981module_i2c_driver(lm87_driver);
982
983MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de> and others");
984MODULE_DESCRIPTION("LM87 driver");
985MODULE_LICENSE("GPL");