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 * This driver also supports the SA56004 from Philips. This device is
58 * pin-compatible with the LM86, the ED/EDP parts are also address-compatible.
60 * Since the LM90 was the first chipset supported by this driver, most
61 * comments will refer to this chipset, but are actually general and
62 * concern all supported chipsets, unless mentioned otherwise.
64 * This program is free software; you can redistribute it and/or modify
65 * it under the terms of the GNU General Public License as published by
66 * the Free Software Foundation; either version 2 of the License, or
67 * (at your option) any later version.
69 * This program is distributed in the hope that it will be useful,
70 * but WITHOUT ANY WARRANTY; without even the implied warranty of
71 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
72 * GNU General Public License for more details.
74 * You should have received a copy of the GNU General Public License
75 * along with this program; if not, write to the Free Software
76 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
79 #include <linux/module.h>
80 #include <linux/init.h>
81 #include <linux/slab.h>
82 #include <linux/jiffies.h>
83 #include <linux/i2c.h>
84 #include <linux/hwmon-sysfs.h>
85 #include <linux/hwmon.h>
86 #include <linux/err.h>
87 #include <linux/mutex.h>
88 #include <linux/sysfs.h>
92 * Address is fully defined internally and cannot be changed except for
93 * MAX6659, MAX6680 and MAX6681.
94 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
95 * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
96 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
98 * MAX6647 has address 0x4e.
99 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
100 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
101 * 0x4c, 0x4d or 0x4e.
102 * SA56004 can have address 0x48 through 0x4F.
105 static const unsigned short normal_i2c[] = {
106 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
107 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
109 enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
110 max6646, w83l771, max6696, sa56004 };
116 #define LM90_REG_R_MAN_ID 0xFE
117 #define LM90_REG_R_CHIP_ID 0xFF
118 #define LM90_REG_R_CONFIG1 0x03
119 #define LM90_REG_W_CONFIG1 0x09
120 #define LM90_REG_R_CONFIG2 0xBF
121 #define LM90_REG_W_CONFIG2 0xBF
122 #define LM90_REG_R_CONVRATE 0x04
123 #define LM90_REG_W_CONVRATE 0x0A
124 #define LM90_REG_R_STATUS 0x02
125 #define LM90_REG_R_LOCAL_TEMP 0x00
126 #define LM90_REG_R_LOCAL_HIGH 0x05
127 #define LM90_REG_W_LOCAL_HIGH 0x0B
128 #define LM90_REG_R_LOCAL_LOW 0x06
129 #define LM90_REG_W_LOCAL_LOW 0x0C
130 #define LM90_REG_R_LOCAL_CRIT 0x20
131 #define LM90_REG_W_LOCAL_CRIT 0x20
132 #define LM90_REG_R_REMOTE_TEMPH 0x01
133 #define LM90_REG_R_REMOTE_TEMPL 0x10
134 #define LM90_REG_R_REMOTE_OFFSH 0x11
135 #define LM90_REG_W_REMOTE_OFFSH 0x11
136 #define LM90_REG_R_REMOTE_OFFSL 0x12
137 #define LM90_REG_W_REMOTE_OFFSL 0x12
138 #define LM90_REG_R_REMOTE_HIGHH 0x07
139 #define LM90_REG_W_REMOTE_HIGHH 0x0D
140 #define LM90_REG_R_REMOTE_HIGHL 0x13
141 #define LM90_REG_W_REMOTE_HIGHL 0x13
142 #define LM90_REG_R_REMOTE_LOWH 0x08
143 #define LM90_REG_W_REMOTE_LOWH 0x0E
144 #define LM90_REG_R_REMOTE_LOWL 0x14
145 #define LM90_REG_W_REMOTE_LOWL 0x14
146 #define LM90_REG_R_REMOTE_CRIT 0x19
147 #define LM90_REG_W_REMOTE_CRIT 0x19
148 #define LM90_REG_R_TCRIT_HYST 0x21
149 #define LM90_REG_W_TCRIT_HYST 0x21
151 /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
153 #define MAX6657_REG_R_LOCAL_TEMPL 0x11
154 #define MAX6696_REG_R_STATUS2 0x12
155 #define MAX6659_REG_R_REMOTE_EMERG 0x16
156 #define MAX6659_REG_W_REMOTE_EMERG 0x16
157 #define MAX6659_REG_R_LOCAL_EMERG 0x17
158 #define MAX6659_REG_W_LOCAL_EMERG 0x17
160 /* SA56004 registers */
162 #define SA56004_REG_R_LOCAL_TEMPL 0x22
164 #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
165 #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
170 #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
171 /* Device features */
172 #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
173 #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
174 #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
175 #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
176 #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
177 #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
180 * Driver data (common to all clients)
183 static const struct i2c_device_id lm90_id[] = {
184 { "adm1032", adm1032 },
185 { "adt7461", adt7461 },
186 { "adt7461a", adt7461 },
191 { "max6646", max6646 },
192 { "max6647", max6646 },
193 { "max6649", max6646 },
194 { "max6657", max6657 },
195 { "max6658", max6657 },
196 { "max6659", max6659 },
197 { "max6680", max6680 },
198 { "max6681", max6680 },
199 { "max6695", max6696 },
200 { "max6696", max6696 },
201 { "nct1008", adt7461 },
202 { "w83l771", w83l771 },
203 { "sa56004", sa56004 },
206 MODULE_DEVICE_TABLE(i2c, lm90_id);
209 * chip type specific parameters
212 u32 flags; /* Capabilities */
213 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
214 /* Upper 8 bits for max6695/96 */
215 u8 max_convrate; /* Maximum conversion rate register value */
216 u8 reg_local_ext; /* Extended local temp register (optional) */
219 static const struct lm90_params lm90_params[] = {
221 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
222 | LM90_HAVE_BROKEN_ALERT,
223 .alert_alarms = 0x7c,
227 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
228 | LM90_HAVE_BROKEN_ALERT,
229 .alert_alarms = 0x7c,
233 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
234 .alert_alarms = 0x7b,
238 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
239 .alert_alarms = 0x7b,
243 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
244 .alert_alarms = 0x7b,
248 .alert_alarms = 0x7c,
250 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
253 .alert_alarms = 0x7c,
255 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
258 .flags = LM90_HAVE_EMERGENCY,
259 .alert_alarms = 0x7c,
261 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
264 .flags = LM90_HAVE_OFFSET,
265 .alert_alarms = 0x7c,
269 .flags = LM90_HAVE_EMERGENCY
270 | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
271 .alert_alarms = 0x187c,
273 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
276 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
277 .alert_alarms = 0x7c,
281 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
282 .alert_alarms = 0x7b,
284 .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
289 * Client data (each client gets its own)
293 struct device *hwmon_dev;
294 struct mutex update_lock;
295 char valid; /* zero until following fields are valid */
296 unsigned long last_updated; /* in jiffies */
300 int update_interval; /* in milliseconds */
302 u8 config_orig; /* Original configuration register value */
303 u8 convrate_orig; /* Original conversion rate register value */
304 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
305 /* Upper 8 bits for max6695/96 */
306 u8 max_convrate; /* Maximum conversion rate */
307 u8 reg_local_ext; /* local extension register offset */
309 /* registers values */
310 s8 temp8[8]; /* 0: local low limit
312 2: local critical limit
313 3: remote critical limit
314 4: local emergency limit (max6659 and max6695/96)
315 5: remote emergency limit (max6659 and max6695/96)
316 6: remote 2 critical limit (max6695/96 only)
317 7: remote 2 emergency limit (max6695/96 only) */
318 s16 temp11[8]; /* 0: remote input
321 3: remote offset (except max6646, max6657/58/59,
324 5: remote 2 input (max6695/96 only)
325 6: remote 2 low limit (max6695/96 only)
326 7: remote 2 high limit (ma6695/96 only) */
328 u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
336 * The ADM1032 supports PEC but not on write byte transactions, so we need
337 * to explicitly ask for a transaction without PEC.
339 static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
341 return i2c_smbus_xfer(client->adapter, client->addr,
342 client->flags & ~I2C_CLIENT_PEC,
343 I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
347 * It is assumed that client->update_lock is held (unless we are in
348 * detection or initialization steps). This matters when PEC is enabled,
349 * because we don't want the address pointer to change between the write
350 * byte and the read byte transactions.
352 static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value)
356 if (client->flags & I2C_CLIENT_PEC) {
357 err = adm1032_write_byte(client, reg);
359 err = i2c_smbus_read_byte(client);
361 err = i2c_smbus_read_byte_data(client, reg);
364 dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
373 static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
379 * There is a trick here. We have to read two registers to have the
380 * sensor temperature, but we have to beware a conversion could occur
381 * between the readings. The datasheet says we should either use
382 * the one-shot conversion register, which we don't want to do
383 * (disables hardware monitoring) or monitor the busy bit, which is
384 * impossible (we can't read the values and monitor that bit at the
385 * exact same time). So the solution used here is to read the high
386 * byte once, then the low byte, then the high byte again. If the new
387 * high byte matches the old one, then we have a valid reading. Else
388 * we have to read the low byte again, and now we believe we have a
391 if ((err = lm90_read_reg(client, regh, &oldh))
392 || (err = lm90_read_reg(client, regl, &l))
393 || (err = lm90_read_reg(client, regh, &newh)))
396 err = lm90_read_reg(client, regl, &l);
400 *value = (newh << 8) | l;
406 * client->update_lock must be held when calling this function (unless we are
407 * in detection or initialization steps), and while a remote channel other
408 * than channel 0 is selected. Also, calling code must make sure to re-select
409 * external channel 0 before releasing the lock. This is necessary because
410 * various registers have different meanings as a result of selecting a
411 * non-default remote channel.
413 static inline void lm90_select_remote_channel(struct i2c_client *client,
414 struct lm90_data *data,
419 if (data->kind == max6696) {
420 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
424 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
430 * Set conversion rate.
431 * client->update_lock must be held when calling this function (unless we are
432 * in detection or initialization steps).
434 static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
435 unsigned int interval)
438 unsigned int update_interval;
440 /* Shift calculations to avoid rounding errors */
443 /* find the nearest update rate */
444 for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
445 i < data->max_convrate; i++, update_interval >>= 1)
446 if (interval >= update_interval * 3 / 4)
449 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
450 data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
453 static struct lm90_data *lm90_update_device(struct device *dev)
455 struct i2c_client *client = to_i2c_client(dev);
456 struct lm90_data *data = i2c_get_clientdata(client);
457 unsigned long next_update;
459 mutex_lock(&data->update_lock);
461 next_update = data->last_updated
462 + msecs_to_jiffies(data->update_interval) + 1;
463 if (time_after(jiffies, next_update) || !data->valid) {
467 dev_dbg(&client->dev, "Updating lm90 data.\n");
468 lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]);
469 lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]);
470 lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]);
471 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]);
472 lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
474 if (data->reg_local_ext) {
475 lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
479 if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
481 data->temp11[4] = h << 8;
483 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
484 LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]);
486 if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
487 data->temp11[1] = h << 8;
488 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
489 && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
491 data->temp11[1] |= l;
493 if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
494 data->temp11[2] = h << 8;
495 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
496 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
498 data->temp11[2] |= l;
501 if (data->flags & LM90_HAVE_OFFSET) {
502 if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
504 && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
506 data->temp11[3] = (h << 8) | l;
508 if (data->flags & LM90_HAVE_EMERGENCY) {
509 lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
511 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
514 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
515 data->alarms = alarms; /* save as 16 bit value */
517 if (data->kind == max6696) {
518 lm90_select_remote_channel(client, data, 1);
519 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
521 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
523 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
524 LM90_REG_R_REMOTE_TEMPL, &data->temp11[5]);
525 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
526 data->temp11[6] = h << 8;
527 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
528 data->temp11[7] = h << 8;
529 lm90_select_remote_channel(client, data, 0);
531 if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
533 data->alarms |= alarms << 8;
536 /* Re-enable ALERT# output if it was originally enabled and
537 * relevant alarms are all clear */
538 if ((data->config_orig & 0x80) == 0
539 && (data->alarms & data->alert_alarms) == 0) {
542 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
544 dev_dbg(&client->dev, "Re-enabling ALERT#\n");
545 i2c_smbus_write_byte_data(client,
551 data->last_updated = jiffies;
555 mutex_unlock(&data->update_lock);
562 * For local temperatures and limits, critical limits and the hysteresis
563 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
564 * For remote temperatures and limits, it uses signed 11-bit values with
565 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
566 * Maxim chips use unsigned values.
569 static inline int temp_from_s8(s8 val)
574 static inline int temp_from_u8(u8 val)
579 static inline int temp_from_s16(s16 val)
581 return val / 32 * 125;
584 static inline int temp_from_u16(u16 val)
586 return val / 32 * 125;
589 static s8 temp_to_s8(long val)
596 return (val - 500) / 1000;
597 return (val + 500) / 1000;
600 static u8 temp_to_u8(long val)
606 return (val + 500) / 1000;
609 static s16 temp_to_s16(long val)
616 return (val - 62) / 125 * 32;
617 return (val + 62) / 125 * 32;
620 static u8 hyst_to_reg(long val)
626 return (val + 500) / 1000;
630 * ADT7461 in compatibility mode is almost identical to LM90 except that
631 * attempts to write values that are outside the range 0 < temp < 127 are
632 * treated as the boundary value.
634 * ADT7461 in "extended mode" operation uses unsigned integers offset by
635 * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
637 static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
639 if (data->flags & LM90_FLAG_ADT7461_EXT)
640 return (val - 64) * 1000;
642 return temp_from_s8(val);
645 static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
647 if (data->flags & LM90_FLAG_ADT7461_EXT)
648 return (val - 0x4000) / 64 * 250;
650 return temp_from_s16(val);
653 static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
655 if (data->flags & LM90_FLAG_ADT7461_EXT) {
660 return (val + 500 + 64000) / 1000;
666 return (val + 500) / 1000;
670 static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
672 if (data->flags & LM90_FLAG_ADT7461_EXT) {
677 return (val + 64000 + 125) / 250 * 64;
683 return (val + 125) / 250 * 64;
691 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
694 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
695 struct lm90_data *data = lm90_update_device(dev);
698 if (data->kind == adt7461)
699 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
700 else if (data->kind == max6646)
701 temp = temp_from_u8(data->temp8[attr->index]);
703 temp = temp_from_s8(data->temp8[attr->index]);
705 /* +16 degrees offset for temp2 for the LM99 */
706 if (data->kind == lm99 && attr->index == 3)
709 return sprintf(buf, "%d\n", temp);
712 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
713 const char *buf, size_t count)
715 static const u8 reg[8] = {
716 LM90_REG_W_LOCAL_LOW,
717 LM90_REG_W_LOCAL_HIGH,
718 LM90_REG_W_LOCAL_CRIT,
719 LM90_REG_W_REMOTE_CRIT,
720 MAX6659_REG_W_LOCAL_EMERG,
721 MAX6659_REG_W_REMOTE_EMERG,
722 LM90_REG_W_REMOTE_CRIT,
723 MAX6659_REG_W_REMOTE_EMERG,
726 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
727 struct i2c_client *client = to_i2c_client(dev);
728 struct lm90_data *data = i2c_get_clientdata(client);
729 int nr = attr->index;
733 err = strict_strtol(buf, 10, &val);
737 /* +16 degrees offset for temp2 for the LM99 */
738 if (data->kind == lm99 && attr->index == 3)
741 mutex_lock(&data->update_lock);
742 if (data->kind == adt7461)
743 data->temp8[nr] = temp_to_u8_adt7461(data, val);
744 else if (data->kind == max6646)
745 data->temp8[nr] = temp_to_u8(val);
747 data->temp8[nr] = temp_to_s8(val);
749 lm90_select_remote_channel(client, data, nr >= 6);
750 i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
751 lm90_select_remote_channel(client, data, 0);
753 mutex_unlock(&data->update_lock);
757 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
760 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
761 struct lm90_data *data = lm90_update_device(dev);
764 if (data->kind == adt7461)
765 temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
766 else if (data->kind == max6646)
767 temp = temp_from_u16(data->temp11[attr->index]);
769 temp = temp_from_s16(data->temp11[attr->index]);
771 /* +16 degrees offset for temp2 for the LM99 */
772 if (data->kind == lm99 && attr->index <= 2)
775 return sprintf(buf, "%d\n", temp);
778 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
779 const char *buf, size_t count)
786 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 },
787 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 },
788 { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 },
789 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 },
790 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
793 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
794 struct i2c_client *client = to_i2c_client(dev);
795 struct lm90_data *data = i2c_get_clientdata(client);
797 int index = attr->index;
801 err = strict_strtol(buf, 10, &val);
805 /* +16 degrees offset for temp2 for the LM99 */
806 if (data->kind == lm99 && index <= 2)
809 mutex_lock(&data->update_lock);
810 if (data->kind == adt7461)
811 data->temp11[index] = temp_to_u16_adt7461(data, val);
812 else if (data->kind == max6646)
813 data->temp11[index] = temp_to_u8(val) << 8;
814 else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
815 data->temp11[index] = temp_to_s16(val);
817 data->temp11[index] = temp_to_s8(val) << 8;
819 lm90_select_remote_channel(client, data, reg[nr].channel);
820 i2c_smbus_write_byte_data(client, reg[nr].high,
821 data->temp11[index] >> 8);
822 if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
823 i2c_smbus_write_byte_data(client, reg[nr].low,
824 data->temp11[index] & 0xff);
825 lm90_select_remote_channel(client, data, 0);
827 mutex_unlock(&data->update_lock);
831 static ssize_t show_temphyst(struct device *dev,
832 struct device_attribute *devattr,
835 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
836 struct lm90_data *data = lm90_update_device(dev);
839 if (data->kind == adt7461)
840 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
841 else if (data->kind == max6646)
842 temp = temp_from_u8(data->temp8[attr->index]);
844 temp = temp_from_s8(data->temp8[attr->index]);
846 /* +16 degrees offset for temp2 for the LM99 */
847 if (data->kind == lm99 && attr->index == 3)
850 return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
853 static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
854 const char *buf, size_t count)
856 struct i2c_client *client = to_i2c_client(dev);
857 struct lm90_data *data = i2c_get_clientdata(client);
862 err = strict_strtol(buf, 10, &val);
866 mutex_lock(&data->update_lock);
867 if (data->kind == adt7461)
868 temp = temp_from_u8_adt7461(data, data->temp8[2]);
869 else if (data->kind == max6646)
870 temp = temp_from_u8(data->temp8[2]);
872 temp = temp_from_s8(data->temp8[2]);
874 data->temp_hyst = hyst_to_reg(temp - val);
875 i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
877 mutex_unlock(&data->update_lock);
881 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
884 struct lm90_data *data = lm90_update_device(dev);
885 return sprintf(buf, "%d\n", data->alarms);
888 static ssize_t show_alarm(struct device *dev, struct device_attribute
891 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
892 struct lm90_data *data = lm90_update_device(dev);
893 int bitnr = attr->index;
895 return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
898 static ssize_t show_update_interval(struct device *dev,
899 struct device_attribute *attr, char *buf)
901 struct lm90_data *data = dev_get_drvdata(dev);
903 return sprintf(buf, "%u\n", data->update_interval);
906 static ssize_t set_update_interval(struct device *dev,
907 struct device_attribute *attr,
908 const char *buf, size_t count)
910 struct i2c_client *client = to_i2c_client(dev);
911 struct lm90_data *data = i2c_get_clientdata(client);
915 err = strict_strtoul(buf, 10, &val);
919 mutex_lock(&data->update_lock);
920 lm90_set_convrate(client, data, val);
921 mutex_unlock(&data->update_lock);
926 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 4);
927 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 0, 0);
928 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
930 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
932 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
934 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
936 static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
938 static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
940 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
942 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3);
943 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
946 /* Individual alarm files */
947 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
948 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
949 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
950 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
951 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
952 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
953 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
954 /* Raw alarm file for compatibility */
955 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
957 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
958 set_update_interval);
960 static struct attribute *lm90_attributes[] = {
961 &sensor_dev_attr_temp1_input.dev_attr.attr,
962 &sensor_dev_attr_temp2_input.dev_attr.attr,
963 &sensor_dev_attr_temp1_min.dev_attr.attr,
964 &sensor_dev_attr_temp2_min.dev_attr.attr,
965 &sensor_dev_attr_temp1_max.dev_attr.attr,
966 &sensor_dev_attr_temp2_max.dev_attr.attr,
967 &sensor_dev_attr_temp1_crit.dev_attr.attr,
968 &sensor_dev_attr_temp2_crit.dev_attr.attr,
969 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
970 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
972 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
973 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
974 &sensor_dev_attr_temp2_fault.dev_attr.attr,
975 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
976 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
977 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
978 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
979 &dev_attr_alarms.attr,
980 &dev_attr_update_interval.attr,
984 static const struct attribute_group lm90_group = {
985 .attrs = lm90_attributes,
989 * Additional attributes for devices with emergency sensors
991 static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
993 static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
995 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
997 static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
1000 static struct attribute *lm90_emergency_attributes[] = {
1001 &sensor_dev_attr_temp1_emergency.dev_attr.attr,
1002 &sensor_dev_attr_temp2_emergency.dev_attr.attr,
1003 &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
1004 &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr,
1008 static const struct attribute_group lm90_emergency_group = {
1009 .attrs = lm90_emergency_attributes,
1012 static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
1013 static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);
1015 static struct attribute *lm90_emergency_alarm_attributes[] = {
1016 &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
1017 &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
1021 static const struct attribute_group lm90_emergency_alarm_group = {
1022 .attrs = lm90_emergency_alarm_attributes,
1026 * Additional attributes for devices with 3 temperature sensors
1028 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 0, 5);
1029 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
1031 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
1033 static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
1035 static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, 6);
1036 static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
1038 static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
1041 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
1042 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
1043 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
1044 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
1045 static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);
1047 static struct attribute *lm90_temp3_attributes[] = {
1048 &sensor_dev_attr_temp3_input.dev_attr.attr,
1049 &sensor_dev_attr_temp3_min.dev_attr.attr,
1050 &sensor_dev_attr_temp3_max.dev_attr.attr,
1051 &sensor_dev_attr_temp3_crit.dev_attr.attr,
1052 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1053 &sensor_dev_attr_temp3_emergency.dev_attr.attr,
1054 &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr,
1056 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1057 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
1058 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
1059 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
1060 &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr,
1064 static const struct attribute_group lm90_temp3_group = {
1065 .attrs = lm90_temp3_attributes,
1068 /* pec used for ADM1032 only */
1069 static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
1072 struct i2c_client *client = to_i2c_client(dev);
1073 return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
1076 static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
1077 const char *buf, size_t count)
1079 struct i2c_client *client = to_i2c_client(dev);
1083 err = strict_strtol(buf, 10, &val);
1089 client->flags &= ~I2C_CLIENT_PEC;
1092 client->flags |= I2C_CLIENT_PEC;
1101 static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
1107 /* Return 0 if detection is successful, -ENODEV otherwise */
1108 static int lm90_detect(struct i2c_client *new_client,
1109 struct i2c_board_info *info)
1111 struct i2c_adapter *adapter = new_client->adapter;
1112 int address = new_client->addr;
1113 const char *name = NULL;
1114 int man_id, chip_id, reg_config1, reg_config2, reg_convrate;
1116 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1119 /* detection and identification */
1120 man_id = i2c_smbus_read_byte_data(new_client, LM90_REG_R_MAN_ID);
1121 chip_id = i2c_smbus_read_byte_data(new_client, LM90_REG_R_CHIP_ID);
1122 reg_config1 = i2c_smbus_read_byte_data(new_client, LM90_REG_R_CONFIG1);
1123 reg_convrate = i2c_smbus_read_byte_data(new_client,
1124 LM90_REG_R_CONVRATE);
1125 if (man_id < 0 || chip_id < 0 || reg_config1 < 0 || reg_convrate < 0)
1128 if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
1129 reg_config2 = i2c_smbus_read_byte_data(new_client,
1130 LM90_REG_R_CONFIG2);
1131 if (reg_config2 < 0)
1134 reg_config2 = 0; /* Make compiler happy */
1136 if ((address == 0x4C || address == 0x4D)
1137 && man_id == 0x01) { /* National Semiconductor */
1138 if ((reg_config1 & 0x2A) == 0x00
1139 && (reg_config2 & 0xF8) == 0x00
1140 && reg_convrate <= 0x09) {
1142 && (chip_id & 0xF0) == 0x20) { /* LM90 */
1145 if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
1147 dev_info(&adapter->dev,
1148 "Assuming LM99 chip at 0x%02x\n",
1150 dev_info(&adapter->dev,
1151 "If it is an LM89, instantiate it "
1152 "with the new_device sysfs "
1156 && (chip_id & 0xF0) == 0x10) { /* LM86 */
1161 if ((address == 0x4C || address == 0x4D)
1162 && man_id == 0x41) { /* Analog Devices */
1163 if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
1164 && (reg_config1 & 0x3F) == 0x00
1165 && reg_convrate <= 0x0A) {
1167 /* The ADM1032 supports PEC, but only if combined
1168 transactions are not used. */
1169 if (i2c_check_functionality(adapter,
1170 I2C_FUNC_SMBUS_BYTE))
1171 info->flags |= I2C_CLIENT_PEC;
1173 if (chip_id == 0x51 /* ADT7461 */
1174 && (reg_config1 & 0x1B) == 0x00
1175 && reg_convrate <= 0x0A) {
1178 if (chip_id == 0x57 /* ADT7461A, NCT1008 */
1179 && (reg_config1 & 0x1B) == 0x00
1180 && reg_convrate <= 0x0A) {
1184 if (man_id == 0x4D) { /* Maxim */
1185 int reg_emerg, reg_emerg2, reg_status2;
1188 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
1189 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
1190 * exists, both readings will reflect the same value. Otherwise,
1191 * the readings will be different.
1193 reg_emerg = i2c_smbus_read_byte_data(new_client,
1194 MAX6659_REG_R_REMOTE_EMERG);
1195 man_id = i2c_smbus_read_byte_data(new_client,
1197 reg_emerg2 = i2c_smbus_read_byte_data(new_client,
1198 MAX6659_REG_R_REMOTE_EMERG);
1199 reg_status2 = i2c_smbus_read_byte_data(new_client,
1200 MAX6696_REG_R_STATUS2);
1201 if (reg_emerg < 0 || man_id < 0 || reg_emerg2 < 0
1206 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
1207 * register. Reading from that address will return the last
1208 * read value, which in our case is those of the man_id
1209 * register. Likewise, the config1 register seems to lack a
1210 * low nibble, so the value will be those of the previous
1211 * read, so in our case those of the man_id register.
1212 * MAX6659 has a third set of upper temperature limit registers.
1213 * Those registers also return values on MAX6657 and MAX6658,
1214 * thus the only way to detect MAX6659 is by its address.
1215 * For this reason it will be mis-detected as MAX6657 if its
1218 if (chip_id == man_id
1219 && (address == 0x4C || address == 0x4D || address == 0x4E)
1220 && (reg_config1 & 0x1F) == (man_id & 0x0F)
1221 && reg_convrate <= 0x09) {
1222 if (address == 0x4C)
1228 * Even though MAX6695 and MAX6696 do not have a chip ID
1229 * register, reading it returns 0x01. Bit 4 of the config1
1230 * register is unused and should return zero when read. Bit 0 of
1231 * the status2 register is unused and should return zero when
1234 * MAX6695 and MAX6696 have an additional set of temperature
1235 * limit registers. We can detect those chips by checking if
1236 * one of those registers exists.
1239 && (reg_config1 & 0x10) == 0x00
1240 && (reg_status2 & 0x01) == 0x00
1241 && reg_emerg == reg_emerg2
1242 && reg_convrate <= 0x07) {
1246 * The chip_id register of the MAX6680 and MAX6681 holds the
1247 * revision of the chip. The lowest bit of the config1 register
1248 * is unused and should return zero when read, so should the
1249 * second to last bit of config1 (software reset).
1252 && (reg_config1 & 0x03) == 0x00
1253 && reg_convrate <= 0x07) {
1257 * The chip_id register of the MAX6646/6647/6649 holds the
1258 * revision of the chip. The lowest 6 bits of the config1
1259 * register are unused and should return zero when read.
1262 && (reg_config1 & 0x3f) == 0x00
1263 && reg_convrate <= 0x07) {
1268 && man_id == 0x5C) { /* Winbond/Nuvoton */
1269 if ((reg_config1 & 0x2A) == 0x00
1270 && (reg_config2 & 0xF8) == 0x00) {
1271 if (chip_id == 0x01 /* W83L771W/G */
1272 && reg_convrate <= 0x09) {
1275 if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
1276 && reg_convrate <= 0x08) {
1281 if (address >= 0x48 && address <= 0x4F
1282 && man_id == 0xA1) { /* NXP Semiconductor/Philips */
1284 && (reg_config1 & 0x2A) == 0x00
1285 && (reg_config2 & 0xFE) == 0x00
1286 && reg_convrate <= 0x09) {
1291 if (!name) { /* identification failed */
1292 dev_dbg(&adapter->dev,
1293 "Unsupported chip at 0x%02x (man_id=0x%02X, "
1294 "chip_id=0x%02X)\n", address, man_id, chip_id);
1298 strlcpy(info->type, name, I2C_NAME_SIZE);
1303 static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
1305 if (data->flags & LM90_HAVE_TEMP3)
1306 sysfs_remove_group(&client->dev.kobj, &lm90_temp3_group);
1307 if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
1308 sysfs_remove_group(&client->dev.kobj,
1309 &lm90_emergency_alarm_group);
1310 if (data->flags & LM90_HAVE_EMERGENCY)
1311 sysfs_remove_group(&client->dev.kobj,
1312 &lm90_emergency_group);
1313 if (data->flags & LM90_HAVE_OFFSET)
1314 device_remove_file(&client->dev,
1315 &sensor_dev_attr_temp2_offset.dev_attr);
1316 device_remove_file(&client->dev, &dev_attr_pec);
1317 sysfs_remove_group(&client->dev.kobj, &lm90_group);
1320 static void lm90_init_client(struct i2c_client *client)
1322 u8 config, convrate;
1323 struct lm90_data *data = i2c_get_clientdata(client);
1325 if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
1326 dev_warn(&client->dev, "Failed to read convrate register!\n");
1327 convrate = LM90_DEF_CONVRATE_RVAL;
1329 data->convrate_orig = convrate;
1332 * Start the conversions.
1334 lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
1335 if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
1336 dev_warn(&client->dev, "Initialization failed!\n");
1339 data->config_orig = config;
1341 /* Check Temperature Range Select */
1342 if (data->kind == adt7461) {
1344 data->flags |= LM90_FLAG_ADT7461_EXT;
1348 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
1349 * 0.125 degree resolution) and range (0x08, extend range
1350 * to -64 degree) mode for the remote temperature sensor.
1352 if (data->kind == max6680)
1356 * Select external channel 0 for max6695/96
1358 if (data->kind == max6696)
1361 config &= 0xBF; /* run */
1362 if (config != data->config_orig) /* Only write if changed */
1363 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
1366 static int lm90_probe(struct i2c_client *new_client,
1367 const struct i2c_device_id *id)
1369 struct i2c_adapter *adapter = to_i2c_adapter(new_client->dev.parent);
1370 struct lm90_data *data;
1373 data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL);
1378 i2c_set_clientdata(new_client, data);
1379 mutex_init(&data->update_lock);
1381 /* Set the device type */
1382 data->kind = id->driver_data;
1383 if (data->kind == adm1032) {
1384 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
1385 new_client->flags &= ~I2C_CLIENT_PEC;
1388 /* Different devices have different alarm bits triggering the
1390 data->alert_alarms = lm90_params[data->kind].alert_alarms;
1392 /* Set chip capabilities */
1393 data->flags = lm90_params[data->kind].flags;
1394 data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
1396 /* Set maximum conversion rate */
1397 data->max_convrate = lm90_params[data->kind].max_convrate;
1399 /* Initialize the LM90 chip */
1400 lm90_init_client(new_client);
1402 /* Register sysfs hooks */
1403 err = sysfs_create_group(&new_client->dev.kobj, &lm90_group);
1406 if (new_client->flags & I2C_CLIENT_PEC) {
1407 err = device_create_file(&new_client->dev, &dev_attr_pec);
1409 goto exit_remove_files;
1411 if (data->flags & LM90_HAVE_OFFSET) {
1412 err = device_create_file(&new_client->dev,
1413 &sensor_dev_attr_temp2_offset.dev_attr);
1415 goto exit_remove_files;
1417 if (data->flags & LM90_HAVE_EMERGENCY) {
1418 err = sysfs_create_group(&new_client->dev.kobj,
1419 &lm90_emergency_group);
1421 goto exit_remove_files;
1423 if (data->flags & LM90_HAVE_EMERGENCY_ALARM) {
1424 err = sysfs_create_group(&new_client->dev.kobj,
1425 &lm90_emergency_alarm_group);
1427 goto exit_remove_files;
1429 if (data->flags & LM90_HAVE_TEMP3) {
1430 err = sysfs_create_group(&new_client->dev.kobj,
1433 goto exit_remove_files;
1436 data->hwmon_dev = hwmon_device_register(&new_client->dev);
1437 if (IS_ERR(data->hwmon_dev)) {
1438 err = PTR_ERR(data->hwmon_dev);
1439 goto exit_remove_files;
1445 lm90_remove_files(new_client, data);
1452 static int lm90_remove(struct i2c_client *client)
1454 struct lm90_data *data = i2c_get_clientdata(client);
1456 hwmon_device_unregister(data->hwmon_dev);
1457 lm90_remove_files(client, data);
1459 /* Restore initial configuration */
1460 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
1461 data->convrate_orig);
1462 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1469 static void lm90_alert(struct i2c_client *client, unsigned int flag)
1471 struct lm90_data *data = i2c_get_clientdata(client);
1472 u8 config, alarms, alarms2 = 0;
1474 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
1476 if (data->kind == max6696)
1477 lm90_read_reg(client, MAX6696_REG_R_STATUS2, &alarms2);
1479 if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
1480 dev_info(&client->dev, "Everything OK\n");
1483 dev_warn(&client->dev,
1484 "temp%d out of range, please check!\n", 1);
1486 dev_warn(&client->dev,
1487 "temp%d out of range, please check!\n", 2);
1489 dev_warn(&client->dev,
1490 "temp%d diode open, please check!\n", 2);
1493 dev_warn(&client->dev,
1494 "temp%d out of range, please check!\n", 3);
1496 /* Disable ALERT# output, because these chips don't implement
1497 SMBus alert correctly; they should only hold the alert line
1499 if ((data->flags & LM90_HAVE_BROKEN_ALERT)
1500 && (alarms & data->alert_alarms)) {
1501 dev_dbg(&client->dev, "Disabling ALERT#\n");
1502 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
1503 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1509 static struct i2c_driver lm90_driver = {
1510 .class = I2C_CLASS_HWMON,
1514 .probe = lm90_probe,
1515 .remove = lm90_remove,
1516 .alert = lm90_alert,
1517 .id_table = lm90_id,
1518 .detect = lm90_detect,
1519 .address_list = normal_i2c,
1522 static int __init sensors_lm90_init(void)
1524 return i2c_add_driver(&lm90_driver);
1527 static void __exit sensors_lm90_exit(void)
1529 i2c_del_driver(&lm90_driver);
1532 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1533 MODULE_DESCRIPTION("LM90/ADM1032 driver");
1534 MODULE_LICENSE("GPL");
1536 module_init(sensors_lm90_init);
1537 module_exit(sensors_lm90_exit);