2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
4 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
5 * Based on the lm90 driver.
7 * The LM63 is a sensor chip made by National Semiconductor. It measures
8 * two temperatures (its own and one external one) and the speed of one
9 * fan, those speed it can additionally control. Complete datasheet can be
10 * obtained from National's website at:
11 * http://www.national.com/pf/LM/LM63.html
13 * The LM63 is basically an LM86 with fan speed monitoring and control
14 * capabilities added. It misses some of the LM86 features though:
15 * - No low limit for local temperature.
16 * - No critical limit for local temperature.
17 * - Critical limit for remote temperature can be changed only once. We
18 * will consider that the critical limit is read-only.
20 * The datasheet isn't very clear about what the tachometer reading is.
21 * I had a explanation from National Semiconductor though. The two lower
22 * bits of the read value have to be masked out. The value is still 16 bit
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/jiffies.h>
44 #include <linux/i2c.h>
45 #include <linux/hwmon-sysfs.h>
46 #include <linux/hwmon.h>
47 #include <linux/err.h>
48 #include <linux/mutex.h>
49 #include <linux/sysfs.h>
50 #include <linux/types.h>
54 * Address is fully defined internally and cannot be changed.
57 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
63 #define LM63_REG_CONFIG1 0x03
64 #define LM63_REG_CONVRATE 0x04
65 #define LM63_REG_CONFIG2 0xBF
66 #define LM63_REG_CONFIG_FAN 0x4A
68 #define LM63_REG_TACH_COUNT_MSB 0x47
69 #define LM63_REG_TACH_COUNT_LSB 0x46
70 #define LM63_REG_TACH_LIMIT_MSB 0x49
71 #define LM63_REG_TACH_LIMIT_LSB 0x48
73 #define LM63_REG_PWM_VALUE 0x4C
74 #define LM63_REG_PWM_FREQ 0x4D
76 #define LM63_REG_LOCAL_TEMP 0x00
77 #define LM63_REG_LOCAL_HIGH 0x05
79 #define LM63_REG_REMOTE_TEMP_MSB 0x01
80 #define LM63_REG_REMOTE_TEMP_LSB 0x10
81 #define LM63_REG_REMOTE_OFFSET_MSB 0x11
82 #define LM63_REG_REMOTE_OFFSET_LSB 0x12
83 #define LM63_REG_REMOTE_HIGH_MSB 0x07
84 #define LM63_REG_REMOTE_HIGH_LSB 0x13
85 #define LM63_REG_REMOTE_LOW_MSB 0x08
86 #define LM63_REG_REMOTE_LOW_LSB 0x14
87 #define LM63_REG_REMOTE_TCRIT 0x19
88 #define LM63_REG_REMOTE_TCRIT_HYST 0x21
90 #define LM63_REG_ALERT_STATUS 0x02
91 #define LM63_REG_ALERT_MASK 0x16
93 #define LM63_REG_MAN_ID 0xFE
94 #define LM63_REG_CHIP_ID 0xFF
96 #define LM96163_REG_TRUTHERM 0x30
97 #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31
98 #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32
99 #define LM96163_REG_CONFIG_ENHANCED 0x45
101 #define LM63_MAX_CONVRATE 9
103 #define LM63_MAX_CONVRATE_HZ 32
104 #define LM96163_MAX_CONVRATE_HZ 26
107 * Conversions and various macros
108 * For tachometer counts, the LM63 uses 16-bit values.
109 * For local temperature and high limit, remote critical limit and hysteresis
110 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
111 * For remote temperature, low and high limits, it uses signed 11-bit values
112 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
113 * For LM64 the actual remote diode temperature is 16 degree Celsius higher
114 * than the register reading. Remote temperature setpoints have to be
115 * adapted accordingly.
118 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
120 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
121 (5400000 / (val)) & 0xFFFC)
122 #define TEMP8_FROM_REG(reg) ((reg) * 1000)
123 #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
124 (val) >= 127000 ? 127 : \
125 (val) < 0 ? ((val) - 500) / 1000 : \
126 ((val) + 500) / 1000)
127 #define TEMP8U_TO_REG(val) ((val) <= 0 ? 0 : \
128 (val) >= 255000 ? 255 : \
129 ((val) + 500) / 1000)
130 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
131 #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
132 (val) >= 127875 ? 0x7FE0 : \
133 (val) < 0 ? ((val) - 62) / 125 * 32 : \
134 ((val) + 62) / 125 * 32)
135 #define TEMP11U_TO_REG(val) ((val) <= 0 ? 0 : \
136 (val) >= 255875 ? 0xFFE0 : \
137 ((val) + 62) / 125 * 32)
138 #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
139 (val) >= 127000 ? 127 : \
140 ((val) + 500) / 1000)
142 #define UPDATE_INTERVAL(max, rate) \
143 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
146 * Functions declaration
149 static int lm63_probe(struct i2c_client *client,
150 const struct i2c_device_id *id);
151 static int lm63_remove(struct i2c_client *client);
153 static struct lm63_data *lm63_update_device(struct device *dev);
155 static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
156 static void lm63_init_client(struct i2c_client *client);
158 enum chips { lm63, lm64, lm96163 };
161 * Driver data (common to all clients)
164 static const struct i2c_device_id lm63_id[] = {
167 { "lm96163", lm96163 },
170 MODULE_DEVICE_TABLE(i2c, lm63_id);
172 static struct i2c_driver lm63_driver = {
173 .class = I2C_CLASS_HWMON,
178 .remove = lm63_remove,
180 .detect = lm63_detect,
181 .address_list = normal_i2c,
185 * Client data (each client gets its own)
189 struct device *hwmon_dev;
190 struct mutex update_lock;
191 char valid; /* zero until following fields are valid */
192 unsigned long last_updated; /* in jiffies */
196 int update_interval; /* in milliseconds */
199 /* registers values */
200 u8 config, config_fan;
201 u16 fan[2]; /* 0: input
205 s8 temp8[3]; /* 0: local input
207 2: remote critical limit */
208 s16 temp11[4]; /* 0: remote input
212 u16 temp11u; /* remote input (unsigned) */
216 bool remote_unsigned; /* true if unsigned remote upper limits */
220 static inline int temp8_from_reg(struct lm63_data *data, int nr)
222 if (data->remote_unsigned)
223 return TEMP8_FROM_REG((u8)data->temp8[nr]);
224 return TEMP8_FROM_REG(data->temp8[nr]);
228 * Sysfs callback functions and files
231 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
234 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
235 struct lm63_data *data = lm63_update_device(dev);
236 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
239 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
240 const char *buf, size_t count)
242 struct i2c_client *client = to_i2c_client(dev);
243 struct lm63_data *data = i2c_get_clientdata(client);
247 err = kstrtoul(buf, 10, &val);
251 mutex_lock(&data->update_lock);
252 data->fan[1] = FAN_TO_REG(val);
253 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
254 data->fan[1] & 0xFF);
255 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
257 mutex_unlock(&data->update_lock);
261 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
264 struct lm63_data *data = lm63_update_device(dev);
267 if (data->pwm_highres)
268 pwm = data->pwm1_value;
270 pwm = data->pwm1_value >= 2 * data->pwm1_freq ?
271 255 : (data->pwm1_value * 255 + data->pwm1_freq) /
272 (2 * data->pwm1_freq);
274 return sprintf(buf, "%d\n", pwm);
277 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
278 const char *buf, size_t count)
280 struct i2c_client *client = to_i2c_client(dev);
281 struct lm63_data *data = i2c_get_clientdata(client);
285 if (!(data->config_fan & 0x20)) /* register is read-only */
288 err = kstrtoul(buf, 10, &val);
292 val = SENSORS_LIMIT(val, 0, 255);
293 mutex_lock(&data->update_lock);
294 data->pwm1_value = data->pwm_highres ? val :
295 (val * data->pwm1_freq * 2 + 127) / 255;
296 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
297 mutex_unlock(&data->update_lock);
301 static ssize_t show_pwm1_enable(struct device *dev,
302 struct device_attribute *dummy, char *buf)
304 struct lm63_data *data = lm63_update_device(dev);
305 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
309 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
310 * For remote sensor registers temp2_offset has to be considered,
311 * for local sensor it must not.
312 * So we need separate 8bit accessors for local and remote sensor.
314 static ssize_t show_local_temp8(struct device *dev,
315 struct device_attribute *devattr,
318 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
319 struct lm63_data *data = lm63_update_device(dev);
320 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
323 static ssize_t show_remote_temp8(struct device *dev,
324 struct device_attribute *devattr,
327 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
328 struct lm63_data *data = lm63_update_device(dev);
329 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
330 + data->temp2_offset);
333 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
334 const char *buf, size_t count)
336 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
337 struct i2c_client *client = to_i2c_client(dev);
338 struct lm63_data *data = i2c_get_clientdata(client);
339 int nr = attr->index;
340 int reg = nr == 2 ? LM63_REG_REMOTE_TCRIT : LM63_REG_LOCAL_HIGH;
345 err = kstrtol(buf, 10, &val);
349 mutex_lock(&data->update_lock);
351 if (data->remote_unsigned)
352 temp = TEMP8U_TO_REG(val - data->temp2_offset);
354 temp = TEMP8_TO_REG(val - data->temp2_offset);
356 temp = TEMP8_TO_REG(val);
358 data->temp8[nr] = temp;
359 i2c_smbus_write_byte_data(client, reg, temp);
360 mutex_unlock(&data->update_lock);
364 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
367 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
368 struct lm63_data *data = lm63_update_device(dev);
369 int nr = attr->index;
374 * Use unsigned temperature unless its value is zero.
375 * If it is zero, use signed temperature.
378 temp = TEMP11_FROM_REG(data->temp11u);
380 temp = TEMP11_FROM_REG(data->temp11[nr]);
382 if (data->remote_unsigned && nr == 2)
383 temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
385 temp = TEMP11_FROM_REG(data->temp11[nr]);
387 return sprintf(buf, "%d\n", temp + data->temp2_offset);
390 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
391 const char *buf, size_t count)
393 static const u8 reg[6] = {
394 LM63_REG_REMOTE_LOW_MSB,
395 LM63_REG_REMOTE_LOW_LSB,
396 LM63_REG_REMOTE_HIGH_MSB,
397 LM63_REG_REMOTE_HIGH_LSB,
398 LM63_REG_REMOTE_OFFSET_MSB,
399 LM63_REG_REMOTE_OFFSET_LSB,
402 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
403 struct i2c_client *client = to_i2c_client(dev);
404 struct lm63_data *data = i2c_get_clientdata(client);
407 int nr = attr->index;
409 err = kstrtol(buf, 10, &val);
413 mutex_lock(&data->update_lock);
414 if (data->remote_unsigned && nr == 2)
415 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
417 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
419 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
420 data->temp11[nr] >> 8);
421 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
422 data->temp11[nr] & 0xff);
423 mutex_unlock(&data->update_lock);
428 * Hysteresis register holds a relative value, while we want to present
429 * an absolute to user-space
431 static ssize_t show_temp2_crit_hyst(struct device *dev,
432 struct device_attribute *dummy, char *buf)
434 struct lm63_data *data = lm63_update_device(dev);
435 return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
437 - TEMP8_FROM_REG(data->temp2_crit_hyst));
441 * And now the other way around, user-space provides an absolute
442 * hysteresis value and we have to store a relative one
444 static ssize_t set_temp2_crit_hyst(struct device *dev,
445 struct device_attribute *dummy,
446 const char *buf, size_t count)
448 struct i2c_client *client = to_i2c_client(dev);
449 struct lm63_data *data = i2c_get_clientdata(client);
454 err = kstrtol(buf, 10, &val);
458 mutex_lock(&data->update_lock);
459 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
460 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
462 mutex_unlock(&data->update_lock);
467 * Set conversion rate.
468 * client->update_lock must be held when calling this function.
470 static void lm63_set_convrate(struct i2c_client *client, struct lm63_data *data,
471 unsigned int interval)
474 unsigned int update_interval;
476 /* Shift calculations to avoid rounding errors */
479 /* find the nearest update rate */
480 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
481 / data->max_convrate_hz;
482 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
483 if (interval >= update_interval * 3 / 4)
486 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
487 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
490 static ssize_t show_update_interval(struct device *dev,
491 struct device_attribute *attr, char *buf)
493 struct lm63_data *data = dev_get_drvdata(dev);
495 return sprintf(buf, "%u\n", data->update_interval);
498 static ssize_t set_update_interval(struct device *dev,
499 struct device_attribute *attr,
500 const char *buf, size_t count)
502 struct i2c_client *client = to_i2c_client(dev);
503 struct lm63_data *data = i2c_get_clientdata(client);
507 err = kstrtoul(buf, 10, &val);
511 mutex_lock(&data->update_lock);
512 lm63_set_convrate(client, data, SENSORS_LIMIT(val, 0, 100000));
513 mutex_unlock(&data->update_lock);
518 static ssize_t show_type(struct device *dev, struct device_attribute *attr,
521 struct i2c_client *client = to_i2c_client(dev);
522 struct lm63_data *data = i2c_get_clientdata(client);
524 return sprintf(buf, data->trutherm ? "1\n" : "2\n");
527 static ssize_t set_type(struct device *dev, struct device_attribute *attr,
528 const char *buf, size_t count)
530 struct i2c_client *client = to_i2c_client(dev);
531 struct lm63_data *data = i2c_get_clientdata(client);
536 ret = kstrtoul(buf, 10, &val);
539 if (val != 1 && val != 2)
542 mutex_lock(&data->update_lock);
543 data->trutherm = val == 1;
544 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
545 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
546 reg | (data->trutherm ? 0x02 : 0x00));
548 mutex_unlock(&data->update_lock);
553 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
556 struct lm63_data *data = lm63_update_device(dev);
557 return sprintf(buf, "%u\n", data->alarms);
560 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
563 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
564 struct lm63_data *data = lm63_update_device(dev);
565 int bitnr = attr->index;
567 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
570 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
571 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
574 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
575 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
577 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
578 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
581 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
582 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
584 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
586 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
588 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
590 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
591 set_temp2_crit_hyst);
593 static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type);
595 /* Individual alarm files */
596 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
597 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
598 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
599 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
600 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
601 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
602 /* Raw alarm file for compatibility */
603 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
605 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
606 set_update_interval);
608 static struct attribute *lm63_attributes[] = {
610 &dev_attr_pwm1_enable.attr,
611 &sensor_dev_attr_temp1_input.dev_attr.attr,
612 &sensor_dev_attr_temp2_input.dev_attr.attr,
613 &sensor_dev_attr_temp2_min.dev_attr.attr,
614 &sensor_dev_attr_temp1_max.dev_attr.attr,
615 &sensor_dev_attr_temp2_max.dev_attr.attr,
616 &sensor_dev_attr_temp2_offset.dev_attr.attr,
617 &sensor_dev_attr_temp2_crit.dev_attr.attr,
618 &dev_attr_temp2_crit_hyst.attr,
620 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
621 &sensor_dev_attr_temp2_fault.dev_attr.attr,
622 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
623 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
624 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
625 &dev_attr_alarms.attr,
626 &dev_attr_update_interval.attr,
631 * On LM63, temp2_crit can be set only once, which should be job
633 * On LM64, temp2_crit can always be set.
634 * On LM96163, temp2_crit can be set if bit 1 of the configuration
637 static umode_t lm63_attribute_mode(struct kobject *kobj,
638 struct attribute *attr, int index)
640 struct device *dev = container_of(kobj, struct device, kobj);
641 struct i2c_client *client = to_i2c_client(dev);
642 struct lm63_data *data = i2c_get_clientdata(client);
644 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
645 && (data->kind == lm64 ||
646 (data->kind == lm96163 && (data->config & 0x02))))
647 return attr->mode | S_IWUSR;
652 static const struct attribute_group lm63_group = {
653 .is_visible = lm63_attribute_mode,
654 .attrs = lm63_attributes,
657 static struct attribute *lm63_attributes_fan1[] = {
658 &sensor_dev_attr_fan1_input.dev_attr.attr,
659 &sensor_dev_attr_fan1_min.dev_attr.attr,
661 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
665 static const struct attribute_group lm63_group_fan1 = {
666 .attrs = lm63_attributes_fan1,
673 /* Return 0 if detection is successful, -ENODEV otherwise */
674 static int lm63_detect(struct i2c_client *new_client,
675 struct i2c_board_info *info)
677 struct i2c_adapter *adapter = new_client->adapter;
678 u8 man_id, chip_id, reg_config1, reg_config2;
679 u8 reg_alert_status, reg_alert_mask;
680 int address = new_client->addr;
682 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
685 man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID);
686 chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID);
688 reg_config1 = i2c_smbus_read_byte_data(new_client,
690 reg_config2 = i2c_smbus_read_byte_data(new_client,
692 reg_alert_status = i2c_smbus_read_byte_data(new_client,
693 LM63_REG_ALERT_STATUS);
694 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
695 LM63_REG_ALERT_MASK);
697 if (man_id != 0x01 /* National Semiconductor */
698 || (reg_config1 & 0x18) != 0x00
699 || (reg_config2 & 0xF8) != 0x00
700 || (reg_alert_status & 0x20) != 0x00
701 || (reg_alert_mask & 0xA4) != 0xA4) {
702 dev_dbg(&adapter->dev,
703 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
708 if (chip_id == 0x41 && address == 0x4c)
709 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
710 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
711 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
712 else if (chip_id == 0x49 && address == 0x4c)
713 strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
720 static int lm63_probe(struct i2c_client *new_client,
721 const struct i2c_device_id *id)
723 struct lm63_data *data;
726 data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
732 i2c_set_clientdata(new_client, data);
734 mutex_init(&data->update_lock);
736 /* Set the device type */
737 data->kind = id->driver_data;
738 if (data->kind == lm64)
739 data->temp2_offset = 16000;
741 /* Initialize chip */
742 lm63_init_client(new_client);
744 /* Register sysfs hooks */
745 err = sysfs_create_group(&new_client->dev.kobj, &lm63_group);
748 if (data->config & 0x04) { /* tachometer enabled */
749 err = sysfs_create_group(&new_client->dev.kobj,
752 goto exit_remove_files;
754 if (data->kind == lm96163) {
755 err = device_create_file(&new_client->dev,
756 &dev_attr_temp2_type);
758 goto exit_remove_files;
761 data->hwmon_dev = hwmon_device_register(&new_client->dev);
762 if (IS_ERR(data->hwmon_dev)) {
763 err = PTR_ERR(data->hwmon_dev);
764 goto exit_remove_files;
770 device_remove_file(&new_client->dev, &dev_attr_temp2_type);
771 sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
772 sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
780 * Ideally we shouldn't have to initialize anything, since the BIOS
781 * should have taken care of everything
783 static void lm63_init_client(struct i2c_client *client)
785 struct lm63_data *data = i2c_get_clientdata(client);
788 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
789 data->config_fan = i2c_smbus_read_byte_data(client,
790 LM63_REG_CONFIG_FAN);
792 /* Start converting if needed */
793 if (data->config & 0x40) { /* standby */
794 dev_dbg(&client->dev, "Switching to operational mode\n");
795 data->config &= 0xA7;
796 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
799 /* Tachometer is always enabled on LM64 */
800 if (data->kind == lm64)
801 data->config |= 0x04;
803 /* We may need pwm1_freq before ever updating the client data */
804 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
805 if (data->pwm1_freq == 0)
808 switch (data->kind) {
811 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
814 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
816 = i2c_smbus_read_byte_data(client,
817 LM96163_REG_TRUTHERM) & 0x02;
820 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
821 if (unlikely(convrate > LM63_MAX_CONVRATE))
822 convrate = LM63_MAX_CONVRATE;
823 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
827 * For LM96163, check if high resolution PWM
828 * and unsigned temperature format is enabled.
830 if (data->kind == lm96163) {
832 = i2c_smbus_read_byte_data(client,
833 LM96163_REG_CONFIG_ENHANCED);
834 if ((config_enhanced & 0x10)
835 && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
836 data->pwm_highres = true;
837 if (config_enhanced & 0x08)
838 data->remote_unsigned = true;
841 /* Show some debug info about the LM63 configuration */
842 if (data->kind == lm63)
843 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
844 (data->config & 0x04) ? "tachometer input" :
846 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
847 (data->config_fan & 0x08) ? "1.4" : "360",
848 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
849 dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
850 (data->config_fan & 0x10) ? "low" : "high",
851 (data->config_fan & 0x20) ? "manual" : "auto");
854 static int lm63_remove(struct i2c_client *client)
856 struct lm63_data *data = i2c_get_clientdata(client);
858 hwmon_device_unregister(data->hwmon_dev);
859 device_remove_file(&client->dev, &dev_attr_temp2_type);
860 sysfs_remove_group(&client->dev.kobj, &lm63_group);
861 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
867 static struct lm63_data *lm63_update_device(struct device *dev)
869 struct i2c_client *client = to_i2c_client(dev);
870 struct lm63_data *data = i2c_get_clientdata(client);
871 unsigned long next_update;
873 mutex_lock(&data->update_lock);
875 next_update = data->last_updated
876 + msecs_to_jiffies(data->update_interval) + 1;
878 if (time_after(jiffies, next_update) || !data->valid) {
879 if (data->config & 0x04) { /* tachometer enabled */
880 /* order matters for fan1_input */
881 data->fan[0] = i2c_smbus_read_byte_data(client,
882 LM63_REG_TACH_COUNT_LSB) & 0xFC;
883 data->fan[0] |= i2c_smbus_read_byte_data(client,
884 LM63_REG_TACH_COUNT_MSB) << 8;
885 data->fan[1] = (i2c_smbus_read_byte_data(client,
886 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
887 | (i2c_smbus_read_byte_data(client,
888 LM63_REG_TACH_LIMIT_MSB) << 8);
891 data->pwm1_freq = i2c_smbus_read_byte_data(client,
893 if (data->pwm1_freq == 0)
895 data->pwm1_value = i2c_smbus_read_byte_data(client,
898 data->temp8[0] = i2c_smbus_read_byte_data(client,
899 LM63_REG_LOCAL_TEMP);
900 data->temp8[1] = i2c_smbus_read_byte_data(client,
901 LM63_REG_LOCAL_HIGH);
903 /* order matters for temp2_input */
904 data->temp11[0] = i2c_smbus_read_byte_data(client,
905 LM63_REG_REMOTE_TEMP_MSB) << 8;
906 data->temp11[0] |= i2c_smbus_read_byte_data(client,
907 LM63_REG_REMOTE_TEMP_LSB);
908 data->temp11[1] = (i2c_smbus_read_byte_data(client,
909 LM63_REG_REMOTE_LOW_MSB) << 8)
910 | i2c_smbus_read_byte_data(client,
911 LM63_REG_REMOTE_LOW_LSB);
912 data->temp11[2] = (i2c_smbus_read_byte_data(client,
913 LM63_REG_REMOTE_HIGH_MSB) << 8)
914 | i2c_smbus_read_byte_data(client,
915 LM63_REG_REMOTE_HIGH_LSB);
916 data->temp11[3] = (i2c_smbus_read_byte_data(client,
917 LM63_REG_REMOTE_OFFSET_MSB) << 8)
918 | i2c_smbus_read_byte_data(client,
919 LM63_REG_REMOTE_OFFSET_LSB);
921 if (data->kind == lm96163)
922 data->temp11u = (i2c_smbus_read_byte_data(client,
923 LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
924 | i2c_smbus_read_byte_data(client,
925 LM96163_REG_REMOTE_TEMP_U_LSB);
927 data->temp8[2] = i2c_smbus_read_byte_data(client,
928 LM63_REG_REMOTE_TCRIT);
929 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
930 LM63_REG_REMOTE_TCRIT_HYST);
932 data->alarms = i2c_smbus_read_byte_data(client,
933 LM63_REG_ALERT_STATUS) & 0x7F;
935 data->last_updated = jiffies;
939 mutex_unlock(&data->update_lock);
944 static int __init sensors_lm63_init(void)
946 return i2c_add_driver(&lm63_driver);
949 static void __exit sensors_lm63_exit(void)
951 i2c_del_driver(&lm63_driver);
954 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
955 MODULE_DESCRIPTION("LM63 driver");
956 MODULE_LICENSE("GPL");
958 module_init(sensors_lm63_init);
959 module_exit(sensors_lm63_exit);