2 * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
4 * Copyright (C) 2003-2005 Jean Delvare <khali@linux-fr.org>
6 * Based on the lm83 driver. The LM90 is a sensor chip made by National
7 * Semiconductor. It reports up to two temperatures (its own plus up to
8 * one external one) with a 0.125 deg resolution (1 deg for local
9 * temperature) and a 3-4 deg accuracy. Complete datasheet can be
10 * obtained from National's website at:
11 * http://www.national.com/pf/LM/LM90.html
13 * This driver also supports the LM89 and LM99, two other sensor chips
14 * made by National Semiconductor. Both have an increased remote
15 * temperature measurement accuracy (1 degree), and the LM99
16 * additionally shifts remote temperatures (measured and limits) by 16
17 * degrees, which allows for higher temperatures measurement. The
18 * driver doesn't handle it since it can be done easily in user-space.
19 * Complete datasheets can be obtained from National's website at:
20 * http://www.national.com/pf/LM/LM89.html
21 * http://www.national.com/pf/LM/LM99.html
22 * Note that there is no way to differentiate between both chips.
24 * This driver also supports the LM86, another sensor chip made by
25 * National Semiconductor. It is exactly similar to the LM90 except it
26 * has a higher accuracy.
27 * Complete datasheet can be obtained from National's website at:
28 * http://www.national.com/pf/LM/LM86.html
30 * This driver also supports the ADM1032, a sensor chip made by Analog
31 * Devices. That chip is similar to the LM90, with a few differences
32 * that are not handled by this driver. Complete datasheet can be
33 * obtained from Analog's website at:
34 * http://www.analog.com/en/prod/0,2877,ADM1032,00.html
35 * Among others, it has a higher accuracy than the LM90, much like the
38 * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor
39 * chips made by Maxim. These chips are similar to the LM86. Complete
40 * datasheet can be obtained at Maxim's website at:
41 * http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
42 * Note that there is no easy way to differentiate between the three
43 * variants. The extra address and features of the MAX6659 are not
44 * supported by this driver.
46 * This driver also supports the ADT7461 chip from Analog Devices but
47 * only in its "compatability mode". If an ADT7461 chip is found but
48 * is configured in non-compatible mode (where its temperature
49 * register values are decoded differently) it is ignored by this
50 * driver. Complete datasheet can be obtained from Analog's website
52 * http://www.analog.com/en/prod/0,2877,ADT7461,00.html
54 * Since the LM90 was the first chipset supported by this driver, most
55 * comments will refer to this chipset, but are actually general and
56 * concern all supported chipsets, unless mentioned otherwise.
58 * This program is free software; you can redistribute it and/or modify
59 * it under the terms of the GNU General Public License as published by
60 * the Free Software Foundation; either version 2 of the License, or
61 * (at your option) any later version.
63 * This program is distributed in the hope that it will be useful,
64 * but WITHOUT ANY WARRANTY; without even the implied warranty of
65 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
66 * GNU General Public License for more details.
68 * You should have received a copy of the GNU General Public License
69 * along with this program; if not, write to the Free Software
70 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
73 #include <linux/module.h>
74 #include <linux/init.h>
75 #include <linux/slab.h>
76 #include <linux/jiffies.h>
77 #include <linux/i2c.h>
78 #include <linux/hwmon-sysfs.h>
79 #include <linux/hwmon.h>
80 #include <linux/err.h>
84 * Address is fully defined internally and cannot be changed except for
86 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, MAX6657 and MAX6658
88 * ADM1032-2, ADT7461-2, LM89-1, and LM99-1 have address 0x4d.
89 * MAX6659 can have address 0x4c, 0x4d or 0x4e (unsupported).
92 static unsigned short normal_i2c[] = { 0x4c, 0x4d, I2C_CLIENT_END };
98 I2C_CLIENT_INSMOD_6(lm90, adm1032, lm99, lm86, max6657, adt7461);
104 #define LM90_REG_R_MAN_ID 0xFE
105 #define LM90_REG_R_CHIP_ID 0xFF
106 #define LM90_REG_R_CONFIG1 0x03
107 #define LM90_REG_W_CONFIG1 0x09
108 #define LM90_REG_R_CONFIG2 0xBF
109 #define LM90_REG_W_CONFIG2 0xBF
110 #define LM90_REG_R_CONVRATE 0x04
111 #define LM90_REG_W_CONVRATE 0x0A
112 #define LM90_REG_R_STATUS 0x02
113 #define LM90_REG_R_LOCAL_TEMP 0x00
114 #define LM90_REG_R_LOCAL_HIGH 0x05
115 #define LM90_REG_W_LOCAL_HIGH 0x0B
116 #define LM90_REG_R_LOCAL_LOW 0x06
117 #define LM90_REG_W_LOCAL_LOW 0x0C
118 #define LM90_REG_R_LOCAL_CRIT 0x20
119 #define LM90_REG_W_LOCAL_CRIT 0x20
120 #define LM90_REG_R_REMOTE_TEMPH 0x01
121 #define LM90_REG_R_REMOTE_TEMPL 0x10
122 #define LM90_REG_R_REMOTE_OFFSH 0x11
123 #define LM90_REG_W_REMOTE_OFFSH 0x11
124 #define LM90_REG_R_REMOTE_OFFSL 0x12
125 #define LM90_REG_W_REMOTE_OFFSL 0x12
126 #define LM90_REG_R_REMOTE_HIGHH 0x07
127 #define LM90_REG_W_REMOTE_HIGHH 0x0D
128 #define LM90_REG_R_REMOTE_HIGHL 0x13
129 #define LM90_REG_W_REMOTE_HIGHL 0x13
130 #define LM90_REG_R_REMOTE_LOWH 0x08
131 #define LM90_REG_W_REMOTE_LOWH 0x0E
132 #define LM90_REG_R_REMOTE_LOWL 0x14
133 #define LM90_REG_W_REMOTE_LOWL 0x14
134 #define LM90_REG_R_REMOTE_CRIT 0x19
135 #define LM90_REG_W_REMOTE_CRIT 0x19
136 #define LM90_REG_R_TCRIT_HYST 0x21
137 #define LM90_REG_W_TCRIT_HYST 0x21
140 * Conversions and various macros
141 * For local temperatures and limits, critical limits and the hysteresis
142 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
143 * For remote temperatures and limits, it uses signed 11-bit values with
144 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
147 #define TEMP1_FROM_REG(val) ((val) * 1000)
148 #define TEMP1_TO_REG(val) ((val) <= -128000 ? -128 : \
149 (val) >= 127000 ? 127 : \
150 (val) < 0 ? ((val) - 500) / 1000 : \
151 ((val) + 500) / 1000)
152 #define TEMP2_FROM_REG(val) ((val) / 32 * 125)
153 #define TEMP2_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
154 (val) >= 127875 ? 0x7FE0 : \
155 (val) < 0 ? ((val) - 62) / 125 * 32 : \
156 ((val) + 62) / 125 * 32)
157 #define HYST_TO_REG(val) ((val) <= 0 ? 0 : (val) >= 30500 ? 31 : \
158 ((val) + 500) / 1000)
161 * ADT7461 is almost identical to LM90 except that attempts to write
162 * values that are outside the range 0 < temp < 127 are treated as
163 * the boundary value.
166 #define TEMP1_TO_REG_ADT7461(val) ((val) <= 0 ? 0 : \
167 (val) >= 127000 ? 127 : \
168 ((val) + 500) / 1000)
169 #define TEMP2_TO_REG_ADT7461(val) ((val) <= 0 ? 0 : \
170 (val) >= 127750 ? 0x7FC0 : \
171 ((val) + 125) / 250 * 64)
174 * Functions declaration
177 static int lm90_attach_adapter(struct i2c_adapter *adapter);
178 static int lm90_detect(struct i2c_adapter *adapter, int address,
180 static void lm90_init_client(struct i2c_client *client);
181 static int lm90_detach_client(struct i2c_client *client);
182 static struct lm90_data *lm90_update_device(struct device *dev);
185 * Driver data (common to all clients)
188 static struct i2c_driver lm90_driver = {
189 .owner = THIS_MODULE,
191 .id = I2C_DRIVERID_LM90,
192 .attach_adapter = lm90_attach_adapter,
193 .detach_client = lm90_detach_client,
197 * Client data (each client gets its own)
201 struct i2c_client client;
202 struct class_device *class_dev;
203 struct semaphore update_lock;
204 char valid; /* zero until following fields are valid */
205 unsigned long last_updated; /* in jiffies */
208 /* registers values */
209 s8 temp8[5]; /* 0: local input
212 3: local critical limit
213 4: remote critical limit */
214 s16 temp11[3]; /* 0: remote input
216 2: remote high limit */
218 u8 alarms; /* bitvector */
225 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
228 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
229 struct lm90_data *data = lm90_update_device(dev);
230 return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->temp8[attr->index]));
233 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
234 const char *buf, size_t count)
236 static const u8 reg[4] = {
237 LM90_REG_W_LOCAL_LOW,
238 LM90_REG_W_LOCAL_HIGH,
239 LM90_REG_W_LOCAL_CRIT,
240 LM90_REG_W_REMOTE_CRIT,
243 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
244 struct i2c_client *client = to_i2c_client(dev);
245 struct lm90_data *data = i2c_get_clientdata(client);
246 long val = simple_strtol(buf, NULL, 10);
247 int nr = attr->index;
249 down(&data->update_lock);
250 if (data->kind == adt7461)
251 data->temp8[nr] = TEMP1_TO_REG_ADT7461(val);
253 data->temp8[nr] = TEMP1_TO_REG(val);
254 i2c_smbus_write_byte_data(client, reg[nr - 1], data->temp8[nr]);
255 up(&data->update_lock);
259 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
262 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
263 struct lm90_data *data = lm90_update_device(dev);
264 return sprintf(buf, "%d\n", TEMP2_FROM_REG(data->temp11[attr->index]));
267 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
268 const char *buf, size_t count)
270 static const u8 reg[4] = {
271 LM90_REG_W_REMOTE_LOWH,
272 LM90_REG_W_REMOTE_LOWL,
273 LM90_REG_W_REMOTE_HIGHH,
274 LM90_REG_W_REMOTE_HIGHL,
277 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
278 struct i2c_client *client = to_i2c_client(dev);
279 struct lm90_data *data = i2c_get_clientdata(client);
280 long val = simple_strtol(buf, NULL, 10);
281 int nr = attr->index;
283 down(&data->update_lock);
284 if (data->kind == adt7461)
285 data->temp11[nr] = TEMP2_TO_REG_ADT7461(val);
287 data->temp11[nr] = TEMP2_TO_REG(val);
288 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
289 data->temp11[nr] >> 8);
290 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
291 data->temp11[nr] & 0xff);
292 up(&data->update_lock);
296 static ssize_t show_temphyst(struct device *dev, struct device_attribute *devattr,
299 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
300 struct lm90_data *data = lm90_update_device(dev);
301 return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->temp8[attr->index])
302 - TEMP1_FROM_REG(data->temp_hyst));
305 static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
306 const char *buf, size_t count)
308 struct i2c_client *client = to_i2c_client(dev);
309 struct lm90_data *data = i2c_get_clientdata(client);
310 long val = simple_strtol(buf, NULL, 10);
313 down(&data->update_lock);
314 hyst = TEMP1_FROM_REG(data->temp8[3]) - val;
315 i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
317 up(&data->update_lock);
321 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
324 struct lm90_data *data = lm90_update_device(dev);
325 return sprintf(buf, "%d\n", data->alarms);
328 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
329 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
330 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
332 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
334 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
336 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
338 static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
340 static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
342 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
344 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 4);
345 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
347 /* pec used for ADM1032 only */
348 static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
351 struct i2c_client *client = to_i2c_client(dev);
352 return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
355 static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
356 const char *buf, size_t count)
358 struct i2c_client *client = to_i2c_client(dev);
359 long val = simple_strtol(buf, NULL, 10);
363 client->flags &= ~I2C_CLIENT_PEC;
366 client->flags |= I2C_CLIENT_PEC;
375 static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
381 /* The ADM1032 supports PEC but not on write byte transactions, so we need
382 to explicitely ask for a transaction without PEC. */
383 static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
385 return i2c_smbus_xfer(client->adapter, client->addr,
386 client->flags & ~I2C_CLIENT_PEC,
387 I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
390 /* It is assumed that client->update_lock is held (unless we are in
391 detection or initialization steps). This matters when PEC is enabled,
392 because we don't want the address pointer to change between the write
393 byte and the read byte transactions. */
394 static int lm90_read_reg(struct i2c_client* client, u8 reg, u8 *value)
398 if (client->flags & I2C_CLIENT_PEC) {
399 err = adm1032_write_byte(client, reg);
401 err = i2c_smbus_read_byte(client);
403 err = i2c_smbus_read_byte_data(client, reg);
406 dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
415 static int lm90_attach_adapter(struct i2c_adapter *adapter)
417 if (!(adapter->class & I2C_CLASS_HWMON))
419 return i2c_probe(adapter, &addr_data, lm90_detect);
423 * The following function does more than just detection. If detection
424 * succeeds, it also registers the new chip.
426 static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
428 struct i2c_client *new_client;
429 struct lm90_data *data;
431 const char *name = "";
433 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
436 if (!(data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL))) {
441 /* The common I2C client data is placed right before the
442 LM90-specific data. */
443 new_client = &data->client;
444 i2c_set_clientdata(new_client, data);
445 new_client->addr = address;
446 new_client->adapter = adapter;
447 new_client->driver = &lm90_driver;
448 new_client->flags = 0;
451 * Now we do the remaining detection. A negative kind means that
452 * the driver was loaded with no force parameter (default), so we
453 * must both detect and identify the chip. A zero kind means that
454 * the driver was loaded with the force parameter, the detection
455 * step shall be skipped. A positive kind means that the driver
456 * was loaded with the force parameter and a given kind of chip is
457 * requested, so both the detection and the identification steps
461 /* Default to an LM90 if forced */
465 if (kind < 0) { /* detection and identification */
466 u8 man_id, chip_id, reg_config1, reg_convrate;
468 if (lm90_read_reg(new_client, LM90_REG_R_MAN_ID,
470 || lm90_read_reg(new_client, LM90_REG_R_CHIP_ID,
472 || lm90_read_reg(new_client, LM90_REG_R_CONFIG1,
474 || lm90_read_reg(new_client, LM90_REG_R_CONVRATE,
478 if (man_id == 0x01) { /* National Semiconductor */
481 if (lm90_read_reg(new_client, LM90_REG_R_CONFIG2,
485 if ((reg_config1 & 0x2A) == 0x00
486 && (reg_config2 & 0xF8) == 0x00
487 && reg_convrate <= 0x09) {
489 && (chip_id & 0xF0) == 0x20) { /* LM90 */
492 if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
496 && (chip_id & 0xF0) == 0x10) { /* LM86 */
501 if (man_id == 0x41) { /* Analog Devices */
502 if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
503 && (reg_config1 & 0x3F) == 0x00
504 && reg_convrate <= 0x0A) {
507 if (chip_id == 0x51 /* ADT7461 */
508 && (reg_config1 & 0x1F) == 0x00 /* check compat mode */
509 && reg_convrate <= 0x0A) {
513 if (man_id == 0x4D) { /* Maxim */
515 * The Maxim variants do NOT have a chip_id register.
516 * Reading from that address will return the last read
517 * value, which in our case is those of the man_id
518 * register. Likewise, the config1 register seems to
519 * lack a low nibble, so the value will be those of the
520 * previous read, so in our case those of the man_id
523 if (chip_id == man_id
524 && (reg_config1 & 0x1F) == (man_id & 0x0F)
525 && reg_convrate <= 0x09) {
530 if (kind <= 0) { /* identification failed */
531 dev_info(&adapter->dev,
532 "Unsupported chip (man_id=0x%02X, "
533 "chip_id=0x%02X).\n", man_id, chip_id);
540 } else if (kind == adm1032) {
542 /* The ADM1032 supports PEC, but only if combined
543 transactions are not used. */
544 if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
545 new_client->flags |= I2C_CLIENT_PEC;
546 } else if (kind == lm99) {
548 } else if (kind == lm86) {
550 } else if (kind == max6657) {
552 } else if (kind == adt7461) {
556 /* We can fill in the remaining client fields */
557 strlcpy(new_client->name, name, I2C_NAME_SIZE);
560 init_MUTEX(&data->update_lock);
562 /* Tell the I2C layer a new client has arrived */
563 if ((err = i2c_attach_client(new_client)))
566 /* Initialize the LM90 chip */
567 lm90_init_client(new_client);
569 /* Register sysfs hooks */
570 data->class_dev = hwmon_device_register(&new_client->dev);
571 if (IS_ERR(data->class_dev)) {
572 err = PTR_ERR(data->class_dev);
576 device_create_file(&new_client->dev,
577 &sensor_dev_attr_temp1_input.dev_attr);
578 device_create_file(&new_client->dev,
579 &sensor_dev_attr_temp2_input.dev_attr);
580 device_create_file(&new_client->dev,
581 &sensor_dev_attr_temp1_min.dev_attr);
582 device_create_file(&new_client->dev,
583 &sensor_dev_attr_temp2_min.dev_attr);
584 device_create_file(&new_client->dev,
585 &sensor_dev_attr_temp1_max.dev_attr);
586 device_create_file(&new_client->dev,
587 &sensor_dev_attr_temp2_max.dev_attr);
588 device_create_file(&new_client->dev,
589 &sensor_dev_attr_temp1_crit.dev_attr);
590 device_create_file(&new_client->dev,
591 &sensor_dev_attr_temp2_crit.dev_attr);
592 device_create_file(&new_client->dev,
593 &sensor_dev_attr_temp1_crit_hyst.dev_attr);
594 device_create_file(&new_client->dev,
595 &sensor_dev_attr_temp2_crit_hyst.dev_attr);
596 device_create_file(&new_client->dev, &dev_attr_alarms);
598 if (new_client->flags & I2C_CLIENT_PEC)
599 device_create_file(&new_client->dev, &dev_attr_pec);
604 i2c_detach_client(new_client);
611 static void lm90_init_client(struct i2c_client *client)
616 * Start the conversions.
618 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
620 if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
621 dev_warn(&client->dev, "Initialization failed!\n");
625 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
626 config & 0xBF); /* run */
629 static int lm90_detach_client(struct i2c_client *client)
631 struct lm90_data *data = i2c_get_clientdata(client);
634 hwmon_device_unregister(data->class_dev);
636 if ((err = i2c_detach_client(client)))
643 static struct lm90_data *lm90_update_device(struct device *dev)
645 struct i2c_client *client = to_i2c_client(dev);
646 struct lm90_data *data = i2c_get_clientdata(client);
648 down(&data->update_lock);
650 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
653 dev_dbg(&client->dev, "Updating lm90 data.\n");
654 lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP, &data->temp8[0]);
655 lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[1]);
656 lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[2]);
657 lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[3]);
658 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[4]);
659 lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
662 * There is a trick here. We have to read two registers to
663 * have the remote sensor temperature, but we have to beware
664 * a conversion could occur inbetween the readings. The
665 * datasheet says we should either use the one-shot
666 * conversion register, which we don't want to do (disables
667 * hardware monitoring) or monitor the busy bit, which is
668 * impossible (we can't read the values and monitor that bit
669 * at the exact same time). So the solution used here is to
670 * read the high byte once, then the low byte, then the high
671 * byte again. If the new high byte matches the old one,
672 * then we have a valid reading. Else we have to read the low
673 * byte again, and now we believe we have a correct reading.
675 if (lm90_read_reg(client, LM90_REG_R_REMOTE_TEMPH, &oldh) == 0
676 && lm90_read_reg(client, LM90_REG_R_REMOTE_TEMPL, &l) == 0
677 && lm90_read_reg(client, LM90_REG_R_REMOTE_TEMPH, &newh) == 0
679 || lm90_read_reg(client, LM90_REG_R_REMOTE_TEMPL, &l) == 0))
680 data->temp11[0] = (newh << 8) | l;
682 if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &newh) == 0
683 && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL, &l) == 0)
684 data->temp11[1] = (newh << 8) | l;
685 if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &newh) == 0
686 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, &l) == 0)
687 data->temp11[2] = (newh << 8) | l;
688 lm90_read_reg(client, LM90_REG_R_STATUS, &data->alarms);
690 data->last_updated = jiffies;
694 up(&data->update_lock);
699 static int __init sensors_lm90_init(void)
701 return i2c_add_driver(&lm90_driver);
704 static void __exit sensors_lm90_exit(void)
706 i2c_del_driver(&lm90_driver);
709 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
710 MODULE_DESCRIPTION("LM90/ADM1032 driver");
711 MODULE_LICENSE("GPL");
713 module_init(sensors_lm90_init);
714 module_exit(sensors_lm90_exit);