2 * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
4 * Copyright (C) 2003-2010 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.
11 * This driver also supports the LM89 and LM99, two other sensor chips
12 * made by National Semiconductor. Both have an increased remote
13 * temperature measurement accuracy (1 degree), and the LM99
14 * additionally shifts remote temperatures (measured and limits) by 16
15 * degrees, which allows for higher temperatures measurement.
16 * Note that there is no way to differentiate between both chips.
17 * When device is auto-detected, the driver will assume an LM99.
19 * This driver also supports the LM86, another sensor chip made by
20 * National Semiconductor. It is exactly similar to the LM90 except it
21 * has a higher accuracy.
23 * This driver also supports the ADM1032, a sensor chip made by Analog
24 * Devices. That chip is similar to the LM90, with a few differences
25 * that are not handled by this driver. Among others, it has a higher
26 * accuracy than the LM90, much like the LM86 does.
28 * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor
29 * chips made by Maxim. These chips are similar to the LM86.
30 * Note that there is no easy way to differentiate between the three
31 * variants. We use the device address to detect MAX6659, which will result
32 * in a detection as max6657 if it is on address 0x4c. The extra address
33 * and features of the MAX6659 are only supported if the chip is configured
34 * explicitly as max6659, or if its address is not 0x4c.
35 * These chips lack the remote temperature offset feature.
37 * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and
38 * MAX6692 chips made by Maxim. These are again similar to the LM86,
39 * but they use unsigned temperature values and can report temperatures
40 * from 0 to 145 degrees.
42 * This driver also supports the MAX6680 and MAX6681, two other sensor
43 * chips made by Maxim. These are quite similar to the other Maxim
44 * chips. The MAX6680 and MAX6681 only differ in the pinout so they can
45 * be treated identically.
47 * This driver also supports the MAX6695 and MAX6696, two other sensor
48 * chips made by Maxim. These are also quite similar to other Maxim
49 * chips, but support three temperature sensors instead of two. MAX6695
50 * and MAX6696 only differ in the pinout so they can be treated identically.
52 * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as
53 * NCT1008 from ON Semiconductor. The chips are supported in both compatibility
54 * and extended mode. They are mostly compatible with LM90 except for a data
55 * format difference for the temperature value registers.
57 * Since the LM90 was the first chipset supported by this driver, most
58 * comments will refer to this chipset, but are actually general and
59 * concern all supported chipsets, unless mentioned otherwise.
61 * This program is free software; you can redistribute it and/or modify
62 * it under the terms of the GNU General Public License as published by
63 * the Free Software Foundation; either version 2 of the License, or
64 * (at your option) any later version.
66 * This program is distributed in the hope that it will be useful,
67 * but WITHOUT ANY WARRANTY; without even the implied warranty of
68 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
69 * GNU General Public License for more details.
71 * You should have received a copy of the GNU General Public License
72 * along with this program; if not, write to the Free Software
73 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
76 #include <linux/module.h>
77 #include <linux/init.h>
78 #include <linux/slab.h>
79 #include <linux/jiffies.h>
80 #include <linux/i2c.h>
81 #include <linux/hwmon-sysfs.h>
82 #include <linux/hwmon.h>
83 #include <linux/err.h>
84 #include <linux/mutex.h>
85 #include <linux/sysfs.h>
89 * Address is fully defined internally and cannot be changed except for
90 * MAX6659, MAX6680 and MAX6681.
91 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
92 * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
93 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
95 * MAX6647 has address 0x4e.
96 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
97 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
101 static const unsigned short normal_i2c[] = {
102 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
104 enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
105 max6646, w83l771, max6696 };
111 #define LM90_REG_R_MAN_ID 0xFE
112 #define LM90_REG_R_CHIP_ID 0xFF
113 #define LM90_REG_R_CONFIG1 0x03
114 #define LM90_REG_W_CONFIG1 0x09
115 #define LM90_REG_R_CONFIG2 0xBF
116 #define LM90_REG_W_CONFIG2 0xBF
117 #define LM90_REG_R_CONVRATE 0x04
118 #define LM90_REG_W_CONVRATE 0x0A
119 #define LM90_REG_R_STATUS 0x02
120 #define LM90_REG_R_LOCAL_TEMP 0x00
121 #define LM90_REG_R_LOCAL_HIGH 0x05
122 #define LM90_REG_W_LOCAL_HIGH 0x0B
123 #define LM90_REG_R_LOCAL_LOW 0x06
124 #define LM90_REG_W_LOCAL_LOW 0x0C
125 #define LM90_REG_R_LOCAL_CRIT 0x20
126 #define LM90_REG_W_LOCAL_CRIT 0x20
127 #define LM90_REG_R_REMOTE_TEMPH 0x01
128 #define LM90_REG_R_REMOTE_TEMPL 0x10
129 #define LM90_REG_R_REMOTE_OFFSH 0x11
130 #define LM90_REG_W_REMOTE_OFFSH 0x11
131 #define LM90_REG_R_REMOTE_OFFSL 0x12
132 #define LM90_REG_W_REMOTE_OFFSL 0x12
133 #define LM90_REG_R_REMOTE_HIGHH 0x07
134 #define LM90_REG_W_REMOTE_HIGHH 0x0D
135 #define LM90_REG_R_REMOTE_HIGHL 0x13
136 #define LM90_REG_W_REMOTE_HIGHL 0x13
137 #define LM90_REG_R_REMOTE_LOWH 0x08
138 #define LM90_REG_W_REMOTE_LOWH 0x0E
139 #define LM90_REG_R_REMOTE_LOWL 0x14
140 #define LM90_REG_W_REMOTE_LOWL 0x14
141 #define LM90_REG_R_REMOTE_CRIT 0x19
142 #define LM90_REG_W_REMOTE_CRIT 0x19
143 #define LM90_REG_R_TCRIT_HYST 0x21
144 #define LM90_REG_W_TCRIT_HYST 0x21
146 /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
148 #define MAX6657_REG_R_LOCAL_TEMPL 0x11
149 #define MAX6696_REG_R_STATUS2 0x12
150 #define MAX6659_REG_R_REMOTE_EMERG 0x16
151 #define MAX6659_REG_W_REMOTE_EMERG 0x16
152 #define MAX6659_REG_R_LOCAL_EMERG 0x17
153 #define MAX6659_REG_W_LOCAL_EMERG 0x17
155 #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
156 #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
161 #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
162 /* Device features */
163 #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
164 #define LM90_HAVE_LOCAL_EXT (1 << 2) /* extended local temperature */
165 #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
166 #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
167 #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
168 #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
169 #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
172 * Driver data (common to all clients)
175 static const struct i2c_device_id lm90_id[] = {
176 { "adm1032", adm1032 },
177 { "adt7461", adt7461 },
178 { "adt7461a", adt7461 },
183 { "max6646", max6646 },
184 { "max6647", max6646 },
185 { "max6649", max6646 },
186 { "max6657", max6657 },
187 { "max6658", max6657 },
188 { "max6659", max6659 },
189 { "max6680", max6680 },
190 { "max6681", max6680 },
191 { "max6695", max6696 },
192 { "max6696", max6696 },
193 { "nct1008", adt7461 },
194 { "w83l771", w83l771 },
197 MODULE_DEVICE_TABLE(i2c, lm90_id);
200 * chip type specific parameters
203 u32 flags; /* Capabilities */
204 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
205 /* Upper 8 bits for max6695/96 */
206 u8 max_convrate; /* Maximum conversion rate register value */
209 static const struct lm90_params lm90_params[] = {
211 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
212 | LM90_HAVE_BROKEN_ALERT,
213 .alert_alarms = 0x7c,
217 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
218 | LM90_HAVE_BROKEN_ALERT,
219 .alert_alarms = 0x7c,
223 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
224 .alert_alarms = 0x7b,
228 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
229 .alert_alarms = 0x7b,
233 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
234 .alert_alarms = 0x7b,
238 .flags = LM90_HAVE_LOCAL_EXT,
239 .alert_alarms = 0x7c,
243 .flags = LM90_HAVE_LOCAL_EXT,
244 .alert_alarms = 0x7c,
248 .flags = LM90_HAVE_LOCAL_EXT | LM90_HAVE_EMERGENCY,
249 .alert_alarms = 0x7c,
253 .flags = LM90_HAVE_OFFSET,
254 .alert_alarms = 0x7c,
258 .flags = LM90_HAVE_LOCAL_EXT | LM90_HAVE_EMERGENCY
259 | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
260 .alert_alarms = 0x187c,
264 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
265 .alert_alarms = 0x7c,
271 * Client data (each client gets its own)
275 struct device *hwmon_dev;
276 struct mutex update_lock;
277 char valid; /* zero until following fields are valid */
278 unsigned long last_updated; /* in jiffies */
282 int update_interval; /* in milliseconds */
284 u8 config_orig; /* Original configuration register value */
285 u8 convrate_orig; /* Original conversion rate register value */
286 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
287 /* Upper 8 bits for max6695/96 */
288 u8 max_convrate; /* Maximum conversion rate */
290 /* registers values */
291 s8 temp8[8]; /* 0: local low limit
293 2: local critical limit
294 3: remote critical limit
295 4: local emergency limit (max6659 and max6695/96)
296 5: remote emergency limit (max6659 and max6695/96)
297 6: remote 2 critical limit (max6695/96 only)
298 7: remote 2 emergency limit (max6695/96 only) */
299 s16 temp11[8]; /* 0: remote input
302 3: remote offset (except max6646, max6657/58/59,
305 5: remote 2 input (max6695/96 only)
306 6: remote 2 low limit (max6695/96 only)
307 7: remote 2 high limit (ma6695/96 only) */
309 u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
317 * The ADM1032 supports PEC but not on write byte transactions, so we need
318 * to explicitly ask for a transaction without PEC.
320 static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
322 return i2c_smbus_xfer(client->adapter, client->addr,
323 client->flags & ~I2C_CLIENT_PEC,
324 I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
328 * It is assumed that client->update_lock is held (unless we are in
329 * detection or initialization steps). This matters when PEC is enabled,
330 * because we don't want the address pointer to change between the write
331 * byte and the read byte transactions.
333 static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value)
337 if (client->flags & I2C_CLIENT_PEC) {
338 err = adm1032_write_byte(client, reg);
340 err = i2c_smbus_read_byte(client);
342 err = i2c_smbus_read_byte_data(client, reg);
345 dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
354 static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
360 * There is a trick here. We have to read two registers to have the
361 * sensor temperature, but we have to beware a conversion could occur
362 * between the readings. The datasheet says we should either use
363 * the one-shot conversion register, which we don't want to do
364 * (disables hardware monitoring) or monitor the busy bit, which is
365 * impossible (we can't read the values and monitor that bit at the
366 * exact same time). So the solution used here is to read the high
367 * byte once, then the low byte, then the high byte again. If the new
368 * high byte matches the old one, then we have a valid reading. Else
369 * we have to read the low byte again, and now we believe we have a
372 if ((err = lm90_read_reg(client, regh, &oldh))
373 || (err = lm90_read_reg(client, regl, &l))
374 || (err = lm90_read_reg(client, regh, &newh)))
377 err = lm90_read_reg(client, regl, &l);
381 *value = (newh << 8) | l;
387 * client->update_lock must be held when calling this function (unless we are
388 * in detection or initialization steps), and while a remote channel other
389 * than channel 0 is selected. Also, calling code must make sure to re-select
390 * external channel 0 before releasing the lock. This is necessary because
391 * various registers have different meanings as a result of selecting a
392 * non-default remote channel.
394 static inline void lm90_select_remote_channel(struct i2c_client *client,
395 struct lm90_data *data,
400 if (data->kind == max6696) {
401 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
405 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
411 * Set conversion rate.
412 * client->update_lock must be held when calling this function (unless we are
413 * in detection or initialization steps).
415 static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
416 unsigned int interval)
419 unsigned int update_interval;
421 /* Shift calculations to avoid rounding errors */
424 /* find the nearest update rate */
425 for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
426 i < data->max_convrate; i++, update_interval >>= 1)
427 if (interval >= update_interval * 3 / 4)
430 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
431 data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
434 static struct lm90_data *lm90_update_device(struct device *dev)
436 struct i2c_client *client = to_i2c_client(dev);
437 struct lm90_data *data = i2c_get_clientdata(client);
438 unsigned long next_update;
440 mutex_lock(&data->update_lock);
442 next_update = data->last_updated
443 + msecs_to_jiffies(data->update_interval) + 1;
444 if (time_after(jiffies, next_update) || !data->valid) {
448 dev_dbg(&client->dev, "Updating lm90 data.\n");
449 lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]);
450 lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]);
451 lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]);
452 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]);
453 lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
455 if (data->flags & LM90_HAVE_LOCAL_EXT) {
456 lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
457 MAX6657_REG_R_LOCAL_TEMPL,
460 if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
462 data->temp11[4] = h << 8;
464 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
465 LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]);
467 if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
468 data->temp11[1] = h << 8;
469 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
470 && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
472 data->temp11[1] |= l;
474 if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
475 data->temp11[2] = h << 8;
476 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
477 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
479 data->temp11[2] |= l;
482 if (data->flags & LM90_HAVE_OFFSET) {
483 if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
485 && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
487 data->temp11[3] = (h << 8) | l;
489 if (data->flags & LM90_HAVE_EMERGENCY) {
490 lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
492 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
495 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
496 data->alarms = alarms; /* save as 16 bit value */
498 if (data->kind == max6696) {
499 lm90_select_remote_channel(client, data, 1);
500 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
502 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
504 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
505 LM90_REG_R_REMOTE_TEMPL, &data->temp11[5]);
506 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
507 data->temp11[6] = h << 8;
508 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
509 data->temp11[7] = h << 8;
510 lm90_select_remote_channel(client, data, 0);
512 if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
514 data->alarms |= alarms << 8;
517 /* Re-enable ALERT# output if it was originally enabled and
518 * relevant alarms are all clear */
519 if ((data->config_orig & 0x80) == 0
520 && (data->alarms & data->alert_alarms) == 0) {
523 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
525 dev_dbg(&client->dev, "Re-enabling ALERT#\n");
526 i2c_smbus_write_byte_data(client,
532 data->last_updated = jiffies;
536 mutex_unlock(&data->update_lock);
543 * For local temperatures and limits, critical limits and the hysteresis
544 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
545 * For remote temperatures and limits, it uses signed 11-bit values with
546 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
547 * Maxim chips use unsigned values.
550 static inline int temp_from_s8(s8 val)
555 static inline int temp_from_u8(u8 val)
560 static inline int temp_from_s16(s16 val)
562 return val / 32 * 125;
565 static inline int temp_from_u16(u16 val)
567 return val / 32 * 125;
570 static s8 temp_to_s8(long val)
577 return (val - 500) / 1000;
578 return (val + 500) / 1000;
581 static u8 temp_to_u8(long val)
587 return (val + 500) / 1000;
590 static s16 temp_to_s16(long val)
597 return (val - 62) / 125 * 32;
598 return (val + 62) / 125 * 32;
601 static u8 hyst_to_reg(long val)
607 return (val + 500) / 1000;
611 * ADT7461 in compatibility mode is almost identical to LM90 except that
612 * attempts to write values that are outside the range 0 < temp < 127 are
613 * treated as the boundary value.
615 * ADT7461 in "extended mode" operation uses unsigned integers offset by
616 * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
618 static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
620 if (data->flags & LM90_FLAG_ADT7461_EXT)
621 return (val - 64) * 1000;
623 return temp_from_s8(val);
626 static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
628 if (data->flags & LM90_FLAG_ADT7461_EXT)
629 return (val - 0x4000) / 64 * 250;
631 return temp_from_s16(val);
634 static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
636 if (data->flags & LM90_FLAG_ADT7461_EXT) {
641 return (val + 500 + 64000) / 1000;
647 return (val + 500) / 1000;
651 static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
653 if (data->flags & LM90_FLAG_ADT7461_EXT) {
658 return (val + 64000 + 125) / 250 * 64;
664 return (val + 125) / 250 * 64;
672 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
675 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
676 struct lm90_data *data = lm90_update_device(dev);
679 if (data->kind == adt7461)
680 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
681 else if (data->kind == max6646)
682 temp = temp_from_u8(data->temp8[attr->index]);
684 temp = temp_from_s8(data->temp8[attr->index]);
686 /* +16 degrees offset for temp2 for the LM99 */
687 if (data->kind == lm99 && attr->index == 3)
690 return sprintf(buf, "%d\n", temp);
693 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
694 const char *buf, size_t count)
696 static const u8 reg[8] = {
697 LM90_REG_W_LOCAL_LOW,
698 LM90_REG_W_LOCAL_HIGH,
699 LM90_REG_W_LOCAL_CRIT,
700 LM90_REG_W_REMOTE_CRIT,
701 MAX6659_REG_W_LOCAL_EMERG,
702 MAX6659_REG_W_REMOTE_EMERG,
703 LM90_REG_W_REMOTE_CRIT,
704 MAX6659_REG_W_REMOTE_EMERG,
707 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
708 struct i2c_client *client = to_i2c_client(dev);
709 struct lm90_data *data = i2c_get_clientdata(client);
710 int nr = attr->index;
714 err = strict_strtol(buf, 10, &val);
718 /* +16 degrees offset for temp2 for the LM99 */
719 if (data->kind == lm99 && attr->index == 3)
722 mutex_lock(&data->update_lock);
723 if (data->kind == adt7461)
724 data->temp8[nr] = temp_to_u8_adt7461(data, val);
725 else if (data->kind == max6646)
726 data->temp8[nr] = temp_to_u8(val);
728 data->temp8[nr] = temp_to_s8(val);
730 lm90_select_remote_channel(client, data, nr >= 6);
731 i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
732 lm90_select_remote_channel(client, data, 0);
734 mutex_unlock(&data->update_lock);
738 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
741 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
742 struct lm90_data *data = lm90_update_device(dev);
745 if (data->kind == adt7461)
746 temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
747 else if (data->kind == max6646)
748 temp = temp_from_u16(data->temp11[attr->index]);
750 temp = temp_from_s16(data->temp11[attr->index]);
752 /* +16 degrees offset for temp2 for the LM99 */
753 if (data->kind == lm99 && attr->index <= 2)
756 return sprintf(buf, "%d\n", temp);
759 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
760 const char *buf, size_t count)
767 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 },
768 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 },
769 { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 },
770 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 },
771 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
774 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
775 struct i2c_client *client = to_i2c_client(dev);
776 struct lm90_data *data = i2c_get_clientdata(client);
778 int index = attr->index;
782 err = strict_strtol(buf, 10, &val);
786 /* +16 degrees offset for temp2 for the LM99 */
787 if (data->kind == lm99 && index <= 2)
790 mutex_lock(&data->update_lock);
791 if (data->kind == adt7461)
792 data->temp11[index] = temp_to_u16_adt7461(data, val);
793 else if (data->kind == max6646)
794 data->temp11[index] = temp_to_u8(val) << 8;
795 else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
796 data->temp11[index] = temp_to_s16(val);
798 data->temp11[index] = temp_to_s8(val) << 8;
800 lm90_select_remote_channel(client, data, reg[nr].channel);
801 i2c_smbus_write_byte_data(client, reg[nr].high,
802 data->temp11[index] >> 8);
803 if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
804 i2c_smbus_write_byte_data(client, reg[nr].low,
805 data->temp11[index] & 0xff);
806 lm90_select_remote_channel(client, data, 0);
808 mutex_unlock(&data->update_lock);
812 static ssize_t show_temphyst(struct device *dev,
813 struct device_attribute *devattr,
816 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
817 struct lm90_data *data = lm90_update_device(dev);
820 if (data->kind == adt7461)
821 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
822 else if (data->kind == max6646)
823 temp = temp_from_u8(data->temp8[attr->index]);
825 temp = temp_from_s8(data->temp8[attr->index]);
827 /* +16 degrees offset for temp2 for the LM99 */
828 if (data->kind == lm99 && attr->index == 3)
831 return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
834 static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
835 const char *buf, size_t count)
837 struct i2c_client *client = to_i2c_client(dev);
838 struct lm90_data *data = i2c_get_clientdata(client);
843 err = strict_strtol(buf, 10, &val);
847 mutex_lock(&data->update_lock);
848 if (data->kind == adt7461)
849 temp = temp_from_u8_adt7461(data, data->temp8[2]);
850 else if (data->kind == max6646)
851 temp = temp_from_u8(data->temp8[2]);
853 temp = temp_from_s8(data->temp8[2]);
855 data->temp_hyst = hyst_to_reg(temp - val);
856 i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
858 mutex_unlock(&data->update_lock);
862 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
865 struct lm90_data *data = lm90_update_device(dev);
866 return sprintf(buf, "%d\n", data->alarms);
869 static ssize_t show_alarm(struct device *dev, struct device_attribute
872 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
873 struct lm90_data *data = lm90_update_device(dev);
874 int bitnr = attr->index;
876 return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
879 static ssize_t show_update_interval(struct device *dev,
880 struct device_attribute *attr, char *buf)
882 struct lm90_data *data = dev_get_drvdata(dev);
884 return sprintf(buf, "%u\n", data->update_interval);
887 static ssize_t set_update_interval(struct device *dev,
888 struct device_attribute *attr,
889 const char *buf, size_t count)
891 struct i2c_client *client = to_i2c_client(dev);
892 struct lm90_data *data = i2c_get_clientdata(client);
896 err = strict_strtoul(buf, 10, &val);
900 mutex_lock(&data->update_lock);
901 lm90_set_convrate(client, data, val);
902 mutex_unlock(&data->update_lock);
907 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 4);
908 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 0, 0);
909 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
911 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
913 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
915 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
917 static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
919 static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
921 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
923 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3);
924 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
927 /* Individual alarm files */
928 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
929 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
930 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
931 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
932 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
933 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
934 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
935 /* Raw alarm file for compatibility */
936 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
938 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
939 set_update_interval);
941 static struct attribute *lm90_attributes[] = {
942 &sensor_dev_attr_temp1_input.dev_attr.attr,
943 &sensor_dev_attr_temp2_input.dev_attr.attr,
944 &sensor_dev_attr_temp1_min.dev_attr.attr,
945 &sensor_dev_attr_temp2_min.dev_attr.attr,
946 &sensor_dev_attr_temp1_max.dev_attr.attr,
947 &sensor_dev_attr_temp2_max.dev_attr.attr,
948 &sensor_dev_attr_temp1_crit.dev_attr.attr,
949 &sensor_dev_attr_temp2_crit.dev_attr.attr,
950 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
951 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
953 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
954 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
955 &sensor_dev_attr_temp2_fault.dev_attr.attr,
956 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
957 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
958 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
959 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
960 &dev_attr_alarms.attr,
961 &dev_attr_update_interval.attr,
965 static const struct attribute_group lm90_group = {
966 .attrs = lm90_attributes,
970 * Additional attributes for devices with emergency sensors
972 static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
974 static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
976 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
978 static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
981 static struct attribute *lm90_emergency_attributes[] = {
982 &sensor_dev_attr_temp1_emergency.dev_attr.attr,
983 &sensor_dev_attr_temp2_emergency.dev_attr.attr,
984 &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
985 &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr,
989 static const struct attribute_group lm90_emergency_group = {
990 .attrs = lm90_emergency_attributes,
993 static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
994 static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);
996 static struct attribute *lm90_emergency_alarm_attributes[] = {
997 &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
998 &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
1002 static const struct attribute_group lm90_emergency_alarm_group = {
1003 .attrs = lm90_emergency_alarm_attributes,
1007 * Additional attributes for devices with 3 temperature sensors
1009 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 0, 5);
1010 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
1012 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
1014 static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
1016 static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, 6);
1017 static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
1019 static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
1022 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
1023 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
1024 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
1025 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
1026 static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);
1028 static struct attribute *lm90_temp3_attributes[] = {
1029 &sensor_dev_attr_temp3_input.dev_attr.attr,
1030 &sensor_dev_attr_temp3_min.dev_attr.attr,
1031 &sensor_dev_attr_temp3_max.dev_attr.attr,
1032 &sensor_dev_attr_temp3_crit.dev_attr.attr,
1033 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1034 &sensor_dev_attr_temp3_emergency.dev_attr.attr,
1035 &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr,
1037 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1038 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
1039 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
1040 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
1041 &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr,
1045 static const struct attribute_group lm90_temp3_group = {
1046 .attrs = lm90_temp3_attributes,
1049 /* pec used for ADM1032 only */
1050 static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
1053 struct i2c_client *client = to_i2c_client(dev);
1054 return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
1057 static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
1058 const char *buf, size_t count)
1060 struct i2c_client *client = to_i2c_client(dev);
1064 err = strict_strtol(buf, 10, &val);
1070 client->flags &= ~I2C_CLIENT_PEC;
1073 client->flags |= I2C_CLIENT_PEC;
1082 static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
1088 /* Return 0 if detection is successful, -ENODEV otherwise */
1089 static int lm90_detect(struct i2c_client *new_client,
1090 struct i2c_board_info *info)
1092 struct i2c_adapter *adapter = new_client->adapter;
1093 int address = new_client->addr;
1094 const char *name = NULL;
1095 int man_id, chip_id, reg_config1, reg_convrate;
1097 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1100 /* detection and identification */
1101 if ((man_id = i2c_smbus_read_byte_data(new_client,
1102 LM90_REG_R_MAN_ID)) < 0
1103 || (chip_id = i2c_smbus_read_byte_data(new_client,
1104 LM90_REG_R_CHIP_ID)) < 0
1105 || (reg_config1 = i2c_smbus_read_byte_data(new_client,
1106 LM90_REG_R_CONFIG1)) < 0
1107 || (reg_convrate = i2c_smbus_read_byte_data(new_client,
1108 LM90_REG_R_CONVRATE)) < 0)
1111 if ((address == 0x4C || address == 0x4D)
1112 && man_id == 0x01) { /* National Semiconductor */
1115 reg_config2 = i2c_smbus_read_byte_data(new_client,
1116 LM90_REG_R_CONFIG2);
1117 if (reg_config2 < 0)
1120 if ((reg_config1 & 0x2A) == 0x00
1121 && (reg_config2 & 0xF8) == 0x00
1122 && reg_convrate <= 0x09) {
1124 && (chip_id & 0xF0) == 0x20) { /* LM90 */
1127 if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
1129 dev_info(&adapter->dev,
1130 "Assuming LM99 chip at 0x%02x\n",
1132 dev_info(&adapter->dev,
1133 "If it is an LM89, instantiate it "
1134 "with the new_device sysfs "
1138 && (chip_id & 0xF0) == 0x10) { /* LM86 */
1143 if ((address == 0x4C || address == 0x4D)
1144 && man_id == 0x41) { /* Analog Devices */
1145 if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
1146 && (reg_config1 & 0x3F) == 0x00
1147 && reg_convrate <= 0x0A) {
1149 /* The ADM1032 supports PEC, but only if combined
1150 transactions are not used. */
1151 if (i2c_check_functionality(adapter,
1152 I2C_FUNC_SMBUS_BYTE))
1153 info->flags |= I2C_CLIENT_PEC;
1155 if (chip_id == 0x51 /* ADT7461 */
1156 && (reg_config1 & 0x1B) == 0x00
1157 && reg_convrate <= 0x0A) {
1160 if (chip_id == 0x57 /* ADT7461A, NCT1008 */
1161 && (reg_config1 & 0x1B) == 0x00
1162 && reg_convrate <= 0x0A) {
1166 if (man_id == 0x4D) { /* Maxim */
1167 int reg_emerg, reg_emerg2, reg_status2;
1170 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
1171 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
1172 * exists, both readings will reflect the same value. Otherwise,
1173 * the readings will be different.
1175 if ((reg_emerg = i2c_smbus_read_byte_data(new_client,
1176 MAX6659_REG_R_REMOTE_EMERG)) < 0
1177 || i2c_smbus_read_byte_data(new_client, LM90_REG_R_MAN_ID) < 0
1178 || (reg_emerg2 = i2c_smbus_read_byte_data(new_client,
1179 MAX6659_REG_R_REMOTE_EMERG)) < 0
1180 || (reg_status2 = i2c_smbus_read_byte_data(new_client,
1181 MAX6696_REG_R_STATUS2)) < 0)
1185 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
1186 * register. Reading from that address will return the last
1187 * read value, which in our case is those of the man_id
1188 * register. Likewise, the config1 register seems to lack a
1189 * low nibble, so the value will be those of the previous
1190 * read, so in our case those of the man_id register.
1191 * MAX6659 has a third set of upper temperature limit registers.
1192 * Those registers also return values on MAX6657 and MAX6658,
1193 * thus the only way to detect MAX6659 is by its address.
1194 * For this reason it will be mis-detected as MAX6657 if its
1197 if (chip_id == man_id
1198 && (address == 0x4C || address == 0x4D || address == 0x4E)
1199 && (reg_config1 & 0x1F) == (man_id & 0x0F)
1200 && reg_convrate <= 0x09) {
1201 if (address == 0x4C)
1207 * Even though MAX6695 and MAX6696 do not have a chip ID
1208 * register, reading it returns 0x01. Bit 4 of the config1
1209 * register is unused and should return zero when read. Bit 0 of
1210 * the status2 register is unused and should return zero when
1213 * MAX6695 and MAX6696 have an additional set of temperature
1214 * limit registers. We can detect those chips by checking if
1215 * one of those registers exists.
1218 && (reg_config1 & 0x10) == 0x00
1219 && (reg_status2 & 0x01) == 0x00
1220 && reg_emerg == reg_emerg2
1221 && reg_convrate <= 0x07) {
1225 * The chip_id register of the MAX6680 and MAX6681 holds the
1226 * revision of the chip. The lowest bit of the config1 register
1227 * is unused and should return zero when read, so should the
1228 * second to last bit of config1 (software reset).
1231 && (reg_config1 & 0x03) == 0x00
1232 && reg_convrate <= 0x07) {
1236 * The chip_id register of the MAX6646/6647/6649 holds the
1237 * revision of the chip. The lowest 6 bits of the config1
1238 * register are unused and should return zero when read.
1241 && (reg_config1 & 0x3f) == 0x00
1242 && reg_convrate <= 0x07) {
1247 && man_id == 0x5C) { /* Winbond/Nuvoton */
1250 reg_config2 = i2c_smbus_read_byte_data(new_client,
1251 LM90_REG_R_CONFIG2);
1252 if (reg_config2 < 0)
1255 if ((reg_config1 & 0x2A) == 0x00
1256 && (reg_config2 & 0xF8) == 0x00) {
1257 if (chip_id == 0x01 /* W83L771W/G */
1258 && reg_convrate <= 0x09) {
1261 if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
1262 && reg_convrate <= 0x08) {
1268 if (!name) { /* identification failed */
1269 dev_dbg(&adapter->dev,
1270 "Unsupported chip at 0x%02x (man_id=0x%02X, "
1271 "chip_id=0x%02X)\n", address, man_id, chip_id);
1275 strlcpy(info->type, name, I2C_NAME_SIZE);
1280 static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
1282 if (data->flags & LM90_HAVE_TEMP3)
1283 sysfs_remove_group(&client->dev.kobj, &lm90_temp3_group);
1284 if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
1285 sysfs_remove_group(&client->dev.kobj,
1286 &lm90_emergency_alarm_group);
1287 if (data->flags & LM90_HAVE_EMERGENCY)
1288 sysfs_remove_group(&client->dev.kobj,
1289 &lm90_emergency_group);
1290 if (data->flags & LM90_HAVE_OFFSET)
1291 device_remove_file(&client->dev,
1292 &sensor_dev_attr_temp2_offset.dev_attr);
1293 device_remove_file(&client->dev, &dev_attr_pec);
1294 sysfs_remove_group(&client->dev.kobj, &lm90_group);
1297 static void lm90_init_client(struct i2c_client *client)
1299 u8 config, convrate;
1300 struct lm90_data *data = i2c_get_clientdata(client);
1302 if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
1303 dev_warn(&client->dev, "Failed to read convrate register!\n");
1304 convrate = LM90_DEF_CONVRATE_RVAL;
1306 data->convrate_orig = convrate;
1309 * Start the conversions.
1311 lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
1312 if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
1313 dev_warn(&client->dev, "Initialization failed!\n");
1316 data->config_orig = config;
1318 /* Check Temperature Range Select */
1319 if (data->kind == adt7461) {
1321 data->flags |= LM90_FLAG_ADT7461_EXT;
1325 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
1326 * 0.125 degree resolution) and range (0x08, extend range
1327 * to -64 degree) mode for the remote temperature sensor.
1329 if (data->kind == max6680)
1333 * Select external channel 0 for max6695/96
1335 if (data->kind == max6696)
1338 config &= 0xBF; /* run */
1339 if (config != data->config_orig) /* Only write if changed */
1340 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
1343 static int lm90_probe(struct i2c_client *new_client,
1344 const struct i2c_device_id *id)
1346 struct i2c_adapter *adapter = to_i2c_adapter(new_client->dev.parent);
1347 struct lm90_data *data;
1350 data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL);
1355 i2c_set_clientdata(new_client, data);
1356 mutex_init(&data->update_lock);
1358 /* Set the device type */
1359 data->kind = id->driver_data;
1360 if (data->kind == adm1032) {
1361 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
1362 new_client->flags &= ~I2C_CLIENT_PEC;
1365 /* Different devices have different alarm bits triggering the
1367 data->alert_alarms = lm90_params[data->kind].alert_alarms;
1369 /* Set chip capabilities */
1370 data->flags = lm90_params[data->kind].flags;
1372 /* Set maximum conversion rate */
1373 data->max_convrate = lm90_params[data->kind].max_convrate;
1375 /* Initialize the LM90 chip */
1376 lm90_init_client(new_client);
1378 /* Register sysfs hooks */
1379 err = sysfs_create_group(&new_client->dev.kobj, &lm90_group);
1382 if (new_client->flags & I2C_CLIENT_PEC) {
1383 err = device_create_file(&new_client->dev, &dev_attr_pec);
1385 goto exit_remove_files;
1387 if (data->flags & LM90_HAVE_OFFSET) {
1388 err = device_create_file(&new_client->dev,
1389 &sensor_dev_attr_temp2_offset.dev_attr);
1391 goto exit_remove_files;
1393 if (data->flags & LM90_HAVE_EMERGENCY) {
1394 err = sysfs_create_group(&new_client->dev.kobj,
1395 &lm90_emergency_group);
1397 goto exit_remove_files;
1399 if (data->flags & LM90_HAVE_EMERGENCY_ALARM) {
1400 err = sysfs_create_group(&new_client->dev.kobj,
1401 &lm90_emergency_alarm_group);
1403 goto exit_remove_files;
1405 if (data->flags & LM90_HAVE_TEMP3) {
1406 err = sysfs_create_group(&new_client->dev.kobj,
1409 goto exit_remove_files;
1412 data->hwmon_dev = hwmon_device_register(&new_client->dev);
1413 if (IS_ERR(data->hwmon_dev)) {
1414 err = PTR_ERR(data->hwmon_dev);
1415 goto exit_remove_files;
1421 lm90_remove_files(new_client, data);
1428 static int lm90_remove(struct i2c_client *client)
1430 struct lm90_data *data = i2c_get_clientdata(client);
1432 hwmon_device_unregister(data->hwmon_dev);
1433 lm90_remove_files(client, data);
1435 /* Restore initial configuration */
1436 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
1437 data->convrate_orig);
1438 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1445 static void lm90_alert(struct i2c_client *client, unsigned int flag)
1447 struct lm90_data *data = i2c_get_clientdata(client);
1448 u8 config, alarms, alarms2 = 0;
1450 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
1452 if (data->kind == max6696)
1453 lm90_read_reg(client, MAX6696_REG_R_STATUS2, &alarms2);
1455 if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
1456 dev_info(&client->dev, "Everything OK\n");
1459 dev_warn(&client->dev,
1460 "temp%d out of range, please check!\n", 1);
1462 dev_warn(&client->dev,
1463 "temp%d out of range, please check!\n", 2);
1465 dev_warn(&client->dev,
1466 "temp%d diode open, please check!\n", 2);
1469 dev_warn(&client->dev,
1470 "temp%d out of range, please check!\n", 3);
1472 /* Disable ALERT# output, because these chips don't implement
1473 SMBus alert correctly; they should only hold the alert line
1475 if ((data->flags & LM90_HAVE_BROKEN_ALERT)
1476 && (alarms & data->alert_alarms)) {
1477 dev_dbg(&client->dev, "Disabling ALERT#\n");
1478 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
1479 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1485 static struct i2c_driver lm90_driver = {
1486 .class = I2C_CLASS_HWMON,
1490 .probe = lm90_probe,
1491 .remove = lm90_remove,
1492 .alert = lm90_alert,
1493 .id_table = lm90_id,
1494 .detect = lm90_detect,
1495 .address_list = normal_i2c,
1498 static int __init sensors_lm90_init(void)
1500 return i2c_add_driver(&lm90_driver);
1503 static void __exit sensors_lm90_exit(void)
1505 i2c_del_driver(&lm90_driver);
1508 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1509 MODULE_DESCRIPTION("LM90/ADM1032 driver");
1510 MODULE_LICENSE("GPL");
1512 module_init(sensors_lm90_init);
1513 module_exit(sensors_lm90_exit);