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>
10 * Original port to Linux 2.6 by Jeff Oliver.
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
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)
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.
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
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.
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.
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.
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 #include <linux/regulator/consumer.h>
73 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
76 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
83 #define LM87_REG_IN(nr) (0x20 + (nr))
84 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
85 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
87 #define LM87_REG_AIN(nr) (0x28 + (nr))
88 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
89 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
91 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
92 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
93 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
95 #define LM87_REG_TEMP_HW_INT_LOCK 0x13
96 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14
97 #define LM87_REG_TEMP_HW_INT 0x17
98 #define LM87_REG_TEMP_HW_EXT 0x18
101 #define LM87_REG_FAN(nr) (0x28 + (nr))
102 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
103 #define LM87_REG_AOUT 0x19
105 #define LM87_REG_CONFIG 0x40
106 #define LM87_REG_CHANNEL_MODE 0x16
107 #define LM87_REG_VID_FAN_DIV 0x47
108 #define LM87_REG_VID4 0x49
110 #define LM87_REG_ALARMS1 0x41
111 #define LM87_REG_ALARMS2 0x42
113 #define LM87_REG_COMPANY_ID 0x3E
114 #define LM87_REG_REVISION 0x3F
117 * Conversions and various macros
118 * The LM87 uses signed 8-bit values for temperatures.
121 #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
122 #define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \
123 (val) >= (scale) * 255 / 192 ? 255 : \
124 ((val) * 192 + (scale) / 2) / (scale))
126 #define TEMP_FROM_REG(reg) ((reg) * 1000)
127 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
128 (val) >= 126500 ? 127 : \
129 (((val) < 0 ? (val) - 500 : \
130 (val) + 500) / 1000))
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)))
137 #define FAN_DIV_FROM_REG(reg) (1 << (reg))
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)
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)
152 * Client data (each client gets its own)
156 struct mutex update_lock;
157 char valid; /* zero until following fields are valid */
158 unsigned long last_updated; /* In jiffies */
160 u8 channel; /* register value */
161 u8 config; /* original register value */
163 u8 in[8]; /* register value */
164 u8 in_max[8]; /* register value */
165 u8 in_min[8]; /* register value */
168 s8 temp[3]; /* register value */
169 s8 temp_high[3]; /* register value */
170 s8 temp_low[3]; /* register value */
171 s8 temp_crit_int; /* min of two register values */
172 s8 temp_crit_ext; /* min of two register values */
174 u8 fan[2]; /* register value */
175 u8 fan_min[2]; /* register value */
176 u8 fan_div[2]; /* register value, shifted right */
177 u8 aout; /* register value */
179 u16 alarms; /* register values, combined */
180 u8 vid; /* register values, combined */
183 const struct attribute_group *attr_groups[6];
186 static inline int lm87_read_value(struct i2c_client *client, u8 reg)
188 return i2c_smbus_read_byte_data(client, reg);
191 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
193 return i2c_smbus_write_byte_data(client, reg, value);
196 static struct lm87_data *lm87_update_device(struct device *dev)
198 struct i2c_client *client = dev_get_drvdata(dev);
199 struct lm87_data *data = i2c_get_clientdata(client);
201 mutex_lock(&data->update_lock);
203 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
206 dev_dbg(&client->dev, "Updating data.\n");
208 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
209 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
211 data->in[i] = lm87_read_value(client,
213 data->in_min[i] = lm87_read_value(client,
215 data->in_max[i] = lm87_read_value(client,
219 for (i = 0; i < 2; i++) {
220 if (data->channel & CHAN_NO_FAN(i)) {
221 data->in[6+i] = lm87_read_value(client,
223 data->in_max[6+i] = lm87_read_value(client,
224 LM87_REG_AIN_MAX(i));
225 data->in_min[6+i] = lm87_read_value(client,
226 LM87_REG_AIN_MIN(i));
229 data->fan[i] = lm87_read_value(client,
231 data->fan_min[i] = lm87_read_value(client,
232 LM87_REG_FAN_MIN(i));
236 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
237 for (i = 0 ; i < j; i++) {
238 data->temp[i] = lm87_read_value(client,
240 data->temp_high[i] = lm87_read_value(client,
241 LM87_REG_TEMP_HIGH[i]);
242 data->temp_low[i] = lm87_read_value(client,
243 LM87_REG_TEMP_LOW[i]);
246 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
247 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
248 data->temp_crit_int = min(i, j);
250 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
251 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
252 data->temp_crit_ext = min(i, j);
254 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
255 data->fan_div[0] = (i >> 4) & 0x03;
256 data->fan_div[1] = (i >> 6) & 0x03;
257 data->vid = (i & 0x0F)
258 | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
261 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
262 | (lm87_read_value(client, LM87_REG_ALARMS2)
264 data->aout = lm87_read_value(client, LM87_REG_AOUT);
266 data->last_updated = jiffies;
270 mutex_unlock(&data->update_lock);
279 static ssize_t in_input_show(struct device *dev,
280 struct device_attribute *attr, char *buf)
282 struct lm87_data *data = lm87_update_device(dev);
283 int nr = to_sensor_dev_attr(attr)->index;
285 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[nr],
286 data->in_scale[nr]));
289 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
292 struct lm87_data *data = lm87_update_device(dev);
293 int nr = to_sensor_dev_attr(attr)->index;
295 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[nr],
296 data->in_scale[nr]));
299 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
302 struct lm87_data *data = lm87_update_device(dev);
303 int nr = to_sensor_dev_attr(attr)->index;
305 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[nr],
306 data->in_scale[nr]));
309 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
310 const char *buf, size_t count)
312 struct i2c_client *client = dev_get_drvdata(dev);
313 struct lm87_data *data = i2c_get_clientdata(client);
314 int nr = to_sensor_dev_attr(attr)->index;
318 err = kstrtol(buf, 10, &val);
322 mutex_lock(&data->update_lock);
323 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
324 lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) :
325 LM87_REG_AIN_MIN(nr - 6), data->in_min[nr]);
326 mutex_unlock(&data->update_lock);
330 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
331 const char *buf, size_t count)
333 struct i2c_client *client = dev_get_drvdata(dev);
334 struct lm87_data *data = i2c_get_clientdata(client);
335 int nr = to_sensor_dev_attr(attr)->index;
339 err = kstrtol(buf, 10, &val);
343 mutex_lock(&data->update_lock);
344 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
345 lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) :
346 LM87_REG_AIN_MAX(nr - 6), data->in_max[nr]);
347 mutex_unlock(&data->update_lock);
351 static SENSOR_DEVICE_ATTR_RO(in0_input, in_input, 0);
352 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
353 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
354 static SENSOR_DEVICE_ATTR_RO(in1_input, in_input, 1);
355 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
356 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
357 static SENSOR_DEVICE_ATTR_RO(in2_input, in_input, 2);
358 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
359 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
360 static SENSOR_DEVICE_ATTR_RO(in3_input, in_input, 3);
361 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
362 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
363 static SENSOR_DEVICE_ATTR_RO(in4_input, in_input, 4);
364 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
365 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
366 static SENSOR_DEVICE_ATTR_RO(in5_input, in_input, 5);
367 static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
368 static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
369 static SENSOR_DEVICE_ATTR_RO(in6_input, in_input, 6);
370 static SENSOR_DEVICE_ATTR_RW(in6_min, in_min, 6);
371 static SENSOR_DEVICE_ATTR_RW(in6_max, in_max, 6);
372 static SENSOR_DEVICE_ATTR_RO(in7_input, in_input, 7);
373 static SENSOR_DEVICE_ATTR_RW(in7_min, in_min, 7);
374 static SENSOR_DEVICE_ATTR_RW(in7_max, in_max, 7);
376 static ssize_t temp_input_show(struct device *dev,
377 struct device_attribute *attr, char *buf)
379 struct lm87_data *data = lm87_update_device(dev);
380 int nr = to_sensor_dev_attr(attr)->index;
382 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
385 static ssize_t temp_low_show(struct device *dev,
386 struct device_attribute *attr, char *buf)
388 struct lm87_data *data = lm87_update_device(dev);
389 int nr = to_sensor_dev_attr(attr)->index;
391 return sprintf(buf, "%d\n",
392 TEMP_FROM_REG(data->temp_low[nr]));
395 static ssize_t temp_high_show(struct device *dev,
396 struct device_attribute *attr, char *buf)
398 struct lm87_data *data = lm87_update_device(dev);
399 int nr = to_sensor_dev_attr(attr)->index;
401 return sprintf(buf, "%d\n",
402 TEMP_FROM_REG(data->temp_high[nr]));
405 static ssize_t temp_low_store(struct device *dev,
406 struct device_attribute *attr, const char *buf,
409 struct i2c_client *client = dev_get_drvdata(dev);
410 struct lm87_data *data = i2c_get_clientdata(client);
411 int nr = to_sensor_dev_attr(attr)->index;
415 err = kstrtol(buf, 10, &val);
419 mutex_lock(&data->update_lock);
420 data->temp_low[nr] = TEMP_TO_REG(val);
421 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
422 mutex_unlock(&data->update_lock);
426 static ssize_t temp_high_store(struct device *dev,
427 struct device_attribute *attr, const char *buf,
430 struct i2c_client *client = dev_get_drvdata(dev);
431 struct lm87_data *data = i2c_get_clientdata(client);
432 int nr = to_sensor_dev_attr(attr)->index;
436 err = kstrtol(buf, 10, &val);
440 mutex_lock(&data->update_lock);
441 data->temp_high[nr] = TEMP_TO_REG(val);
442 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
443 mutex_unlock(&data->update_lock);
447 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
448 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_low, 0);
449 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_high, 0);
450 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
451 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_low, 1);
452 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_high, 1);
453 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2);
454 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_low, 2);
455 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_high, 2);
457 static ssize_t temp1_crit_show(struct device *dev,
458 struct device_attribute *attr, char *buf)
460 struct lm87_data *data = lm87_update_device(dev);
461 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
464 static ssize_t temp2_crit_show(struct device *dev,
465 struct device_attribute *attr, char *buf)
467 struct lm87_data *data = lm87_update_device(dev);
468 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
471 static DEVICE_ATTR_RO(temp1_crit);
472 static DEVICE_ATTR_RO(temp2_crit);
473 static DEVICE_ATTR(temp3_crit, 0444, temp2_crit_show, NULL);
475 static ssize_t fan_input_show(struct device *dev,
476 struct device_attribute *attr, char *buf)
478 struct lm87_data *data = lm87_update_device(dev);
479 int nr = to_sensor_dev_attr(attr)->index;
481 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
482 FAN_DIV_FROM_REG(data->fan_div[nr])));
485 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
488 struct lm87_data *data = lm87_update_device(dev);
489 int nr = to_sensor_dev_attr(attr)->index;
491 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
492 FAN_DIV_FROM_REG(data->fan_div[nr])));
495 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
498 struct lm87_data *data = lm87_update_device(dev);
499 int nr = to_sensor_dev_attr(attr)->index;
501 return sprintf(buf, "%d\n",
502 FAN_DIV_FROM_REG(data->fan_div[nr]));
505 static ssize_t fan_min_store(struct device *dev,
506 struct device_attribute *attr, const char *buf,
509 struct i2c_client *client = dev_get_drvdata(dev);
510 struct lm87_data *data = i2c_get_clientdata(client);
511 int nr = to_sensor_dev_attr(attr)->index;
515 err = kstrtol(buf, 10, &val);
519 mutex_lock(&data->update_lock);
520 data->fan_min[nr] = FAN_TO_REG(val,
521 FAN_DIV_FROM_REG(data->fan_div[nr]));
522 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
523 mutex_unlock(&data->update_lock);
528 * Note: we save and restore the fan minimum here, because its value is
529 * determined in part by the fan clock divider. This follows the principle
530 * of least surprise; the user doesn't expect the fan minimum to change just
531 * because the divider changed.
533 static ssize_t fan_div_store(struct device *dev,
534 struct device_attribute *attr, const char *buf,
537 struct i2c_client *client = dev_get_drvdata(dev);
538 struct lm87_data *data = i2c_get_clientdata(client);
539 int nr = to_sensor_dev_attr(attr)->index;
545 err = kstrtol(buf, 10, &val);
549 mutex_lock(&data->update_lock);
550 min = FAN_FROM_REG(data->fan_min[nr],
551 FAN_DIV_FROM_REG(data->fan_div[nr]));
555 data->fan_div[nr] = 0;
558 data->fan_div[nr] = 1;
561 data->fan_div[nr] = 2;
564 data->fan_div[nr] = 3;
567 mutex_unlock(&data->update_lock);
571 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
574 reg = (reg & 0xCF) | (data->fan_div[0] << 4);
577 reg = (reg & 0x3F) | (data->fan_div[1] << 6);
580 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
582 data->fan_min[nr] = FAN_TO_REG(min, val);
583 lm87_write_value(client, LM87_REG_FAN_MIN(nr),
585 mutex_unlock(&data->update_lock);
590 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
591 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
592 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
593 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
594 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
595 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
597 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
600 struct lm87_data *data = lm87_update_device(dev);
601 return sprintf(buf, "%d\n", data->alarms);
603 static DEVICE_ATTR_RO(alarms);
605 static ssize_t cpu0_vid_show(struct device *dev,
606 struct device_attribute *attr, char *buf)
608 struct lm87_data *data = lm87_update_device(dev);
609 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
611 static DEVICE_ATTR_RO(cpu0_vid);
613 static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,
616 struct lm87_data *data = dev_get_drvdata(dev);
617 return sprintf(buf, "%d\n", data->vrm);
619 static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
620 const char *buf, size_t count)
622 struct lm87_data *data = dev_get_drvdata(dev);
626 err = kstrtoul(buf, 10, &val);
636 static DEVICE_ATTR_RW(vrm);
638 static ssize_t aout_output_show(struct device *dev,
639 struct device_attribute *attr, char *buf)
641 struct lm87_data *data = lm87_update_device(dev);
642 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
644 static ssize_t aout_output_store(struct device *dev,
645 struct device_attribute *attr,
646 const char *buf, size_t count)
648 struct i2c_client *client = dev_get_drvdata(dev);
649 struct lm87_data *data = i2c_get_clientdata(client);
653 err = kstrtol(buf, 10, &val);
657 mutex_lock(&data->update_lock);
658 data->aout = AOUT_TO_REG(val);
659 lm87_write_value(client, LM87_REG_AOUT, data->aout);
660 mutex_unlock(&data->update_lock);
663 static DEVICE_ATTR_RW(aout_output);
665 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
668 struct lm87_data *data = lm87_update_device(dev);
669 int bitnr = to_sensor_dev_attr(attr)->index;
670 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
672 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
673 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
674 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
675 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
676 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
677 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
678 static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 6);
679 static SENSOR_DEVICE_ATTR_RO(in7_alarm, alarm, 7);
680 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
681 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 5);
682 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 5);
683 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
684 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
685 static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 14);
686 static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 15);
692 static struct attribute *lm87_attributes[] = {
693 &sensor_dev_attr_in1_input.dev_attr.attr,
694 &sensor_dev_attr_in1_min.dev_attr.attr,
695 &sensor_dev_attr_in1_max.dev_attr.attr,
696 &sensor_dev_attr_in1_alarm.dev_attr.attr,
697 &sensor_dev_attr_in2_input.dev_attr.attr,
698 &sensor_dev_attr_in2_min.dev_attr.attr,
699 &sensor_dev_attr_in2_max.dev_attr.attr,
700 &sensor_dev_attr_in2_alarm.dev_attr.attr,
701 &sensor_dev_attr_in3_input.dev_attr.attr,
702 &sensor_dev_attr_in3_min.dev_attr.attr,
703 &sensor_dev_attr_in3_max.dev_attr.attr,
704 &sensor_dev_attr_in3_alarm.dev_attr.attr,
705 &sensor_dev_attr_in4_input.dev_attr.attr,
706 &sensor_dev_attr_in4_min.dev_attr.attr,
707 &sensor_dev_attr_in4_max.dev_attr.attr,
708 &sensor_dev_attr_in4_alarm.dev_attr.attr,
710 &sensor_dev_attr_temp1_input.dev_attr.attr,
711 &sensor_dev_attr_temp1_max.dev_attr.attr,
712 &sensor_dev_attr_temp1_min.dev_attr.attr,
713 &dev_attr_temp1_crit.attr,
714 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
715 &sensor_dev_attr_temp2_input.dev_attr.attr,
716 &sensor_dev_attr_temp2_max.dev_attr.attr,
717 &sensor_dev_attr_temp2_min.dev_attr.attr,
718 &dev_attr_temp2_crit.attr,
719 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
720 &sensor_dev_attr_temp2_fault.dev_attr.attr,
722 &dev_attr_alarms.attr,
723 &dev_attr_aout_output.attr,
728 static const struct attribute_group lm87_group = {
729 .attrs = lm87_attributes,
732 static struct attribute *lm87_attributes_in6[] = {
733 &sensor_dev_attr_in6_input.dev_attr.attr,
734 &sensor_dev_attr_in6_min.dev_attr.attr,
735 &sensor_dev_attr_in6_max.dev_attr.attr,
736 &sensor_dev_attr_in6_alarm.dev_attr.attr,
740 static const struct attribute_group lm87_group_in6 = {
741 .attrs = lm87_attributes_in6,
744 static struct attribute *lm87_attributes_fan1[] = {
745 &sensor_dev_attr_fan1_input.dev_attr.attr,
746 &sensor_dev_attr_fan1_min.dev_attr.attr,
747 &sensor_dev_attr_fan1_div.dev_attr.attr,
748 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
752 static const struct attribute_group lm87_group_fan1 = {
753 .attrs = lm87_attributes_fan1,
756 static struct attribute *lm87_attributes_in7[] = {
757 &sensor_dev_attr_in7_input.dev_attr.attr,
758 &sensor_dev_attr_in7_min.dev_attr.attr,
759 &sensor_dev_attr_in7_max.dev_attr.attr,
760 &sensor_dev_attr_in7_alarm.dev_attr.attr,
764 static const struct attribute_group lm87_group_in7 = {
765 .attrs = lm87_attributes_in7,
768 static struct attribute *lm87_attributes_fan2[] = {
769 &sensor_dev_attr_fan2_input.dev_attr.attr,
770 &sensor_dev_attr_fan2_min.dev_attr.attr,
771 &sensor_dev_attr_fan2_div.dev_attr.attr,
772 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
776 static const struct attribute_group lm87_group_fan2 = {
777 .attrs = lm87_attributes_fan2,
780 static struct attribute *lm87_attributes_temp3[] = {
781 &sensor_dev_attr_temp3_input.dev_attr.attr,
782 &sensor_dev_attr_temp3_max.dev_attr.attr,
783 &sensor_dev_attr_temp3_min.dev_attr.attr,
784 &dev_attr_temp3_crit.attr,
785 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
786 &sensor_dev_attr_temp3_fault.dev_attr.attr,
790 static const struct attribute_group lm87_group_temp3 = {
791 .attrs = lm87_attributes_temp3,
794 static struct attribute *lm87_attributes_in0_5[] = {
795 &sensor_dev_attr_in0_input.dev_attr.attr,
796 &sensor_dev_attr_in0_min.dev_attr.attr,
797 &sensor_dev_attr_in0_max.dev_attr.attr,
798 &sensor_dev_attr_in0_alarm.dev_attr.attr,
799 &sensor_dev_attr_in5_input.dev_attr.attr,
800 &sensor_dev_attr_in5_min.dev_attr.attr,
801 &sensor_dev_attr_in5_max.dev_attr.attr,
802 &sensor_dev_attr_in5_alarm.dev_attr.attr,
806 static const struct attribute_group lm87_group_in0_5 = {
807 .attrs = lm87_attributes_in0_5,
810 static struct attribute *lm87_attributes_vid[] = {
811 &dev_attr_cpu0_vid.attr,
816 static const struct attribute_group lm87_group_vid = {
817 .attrs = lm87_attributes_vid,
820 /* Return 0 if detection is successful, -ENODEV otherwise */
821 static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info)
823 struct i2c_adapter *adapter = client->adapter;
827 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
830 if (lm87_read_value(client, LM87_REG_CONFIG) & 0x80)
833 /* Now, we do the remaining detection. */
834 cid = lm87_read_value(client, LM87_REG_COMPANY_ID);
835 rev = lm87_read_value(client, LM87_REG_REVISION);
837 if (cid == 0x02 /* National Semiconductor */
838 && (rev >= 0x01 && rev <= 0x08))
840 else if (cid == 0x41 /* Analog Devices */
841 && (rev & 0xf0) == 0x10)
844 dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n",
849 strlcpy(info->type, name, I2C_NAME_SIZE);
854 static void lm87_restore_config(void *arg)
856 struct i2c_client *client = arg;
857 struct lm87_data *data = i2c_get_clientdata(client);
859 lm87_write_value(client, LM87_REG_CONFIG, data->config);
862 static int lm87_init_client(struct i2c_client *client)
864 struct lm87_data *data = i2c_get_clientdata(client);
866 struct device_node *of_node = client->dev.of_node;
868 struct regulator *vcc = NULL;
871 if (of_property_read_bool(of_node, "has-temp3"))
873 if (of_property_read_bool(of_node, "has-in6"))
874 val |= CHAN_NO_FAN(0);
875 if (of_property_read_bool(of_node, "has-in7"))
876 val |= CHAN_NO_FAN(1);
877 vcc = devm_regulator_get_optional(&client->dev, "vcc");
879 if (regulator_get_voltage(vcc) == 5000000)
883 lm87_write_value(client,
884 LM87_REG_CHANNEL_MODE, data->channel);
885 } else if (dev_get_platdata(&client->dev)) {
886 data->channel = *(u8 *)dev_get_platdata(&client->dev);
887 lm87_write_value(client,
888 LM87_REG_CHANNEL_MODE, data->channel);
890 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
892 data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
894 rc = devm_add_action(&client->dev, lm87_restore_config, client);
898 if (!(data->config & 0x01)) {
901 /* Limits are left uninitialized after power-up */
902 for (i = 1; i < 6; i++) {
903 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
904 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
906 for (i = 0; i < 2; i++) {
907 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
908 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
909 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
910 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
912 if (data->channel & CHAN_TEMP3) {
913 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
914 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
916 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
917 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
921 /* Make sure Start is set and INT#_Clear is clear */
922 if ((data->config & 0x09) != 0x01)
923 lm87_write_value(client, LM87_REG_CONFIG,
924 (data->config & 0x77) | 0x01);
928 static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id)
930 struct lm87_data *data;
931 struct device *hwmon_dev;
933 unsigned int group_tail = 0;
935 data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL);
939 i2c_set_clientdata(client, data);
940 mutex_init(&data->update_lock);
942 /* Initialize the LM87 chip */
943 err = lm87_init_client(client);
947 data->in_scale[0] = 2500;
948 data->in_scale[1] = 2700;
949 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
950 data->in_scale[3] = 5000;
951 data->in_scale[4] = 12000;
952 data->in_scale[5] = 2700;
953 data->in_scale[6] = 1875;
954 data->in_scale[7] = 1875;
957 * Construct the list of attributes, the list depends on the
958 * configuration of the chip
960 data->attr_groups[group_tail++] = &lm87_group;
961 if (data->channel & CHAN_NO_FAN(0))
962 data->attr_groups[group_tail++] = &lm87_group_in6;
964 data->attr_groups[group_tail++] = &lm87_group_fan1;
966 if (data->channel & CHAN_NO_FAN(1))
967 data->attr_groups[group_tail++] = &lm87_group_in7;
969 data->attr_groups[group_tail++] = &lm87_group_fan2;
971 if (data->channel & CHAN_TEMP3)
972 data->attr_groups[group_tail++] = &lm87_group_temp3;
974 data->attr_groups[group_tail++] = &lm87_group_in0_5;
976 if (!(data->channel & CHAN_NO_VID)) {
977 data->vrm = vid_which_vrm();
978 data->attr_groups[group_tail++] = &lm87_group_vid;
981 hwmon_dev = devm_hwmon_device_register_with_groups(
982 &client->dev, client->name, client, data->attr_groups);
983 return PTR_ERR_OR_ZERO(hwmon_dev);
987 * Driver data (common to all clients)
990 static const struct i2c_device_id lm87_id[] = {
995 MODULE_DEVICE_TABLE(i2c, lm87_id);
997 static const struct of_device_id lm87_of_match[] = {
998 { .compatible = "ti,lm87" },
999 { .compatible = "adi,adm1024" },
1002 MODULE_DEVICE_TABLE(of, lm87_of_match);
1004 static struct i2c_driver lm87_driver = {
1005 .class = I2C_CLASS_HWMON,
1008 .of_match_table = lm87_of_match,
1010 .probe = lm87_probe,
1011 .id_table = lm87_id,
1012 .detect = lm87_detect,
1013 .address_list = normal_i2c,
1016 module_i2c_driver(lm87_driver);
1018 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de> and others");
1019 MODULE_DESCRIPTION("LM87 driver");
1020 MODULE_LICENSE("GPL");