2 * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
4 * Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de>
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 * This driver also supports the G781 from GMT. This device is compatible
63 * This driver also supports TMP451 from Texas Instruments. This device is
64 * supported in both compatibility and extended mode. It's mostly compatible
65 * with ADT7461 except for local temperature low byte register and max
68 * Since the LM90 was the first chipset supported by this driver, most
69 * comments will refer to this chipset, but are actually general and
70 * concern all supported chipsets, unless mentioned otherwise.
72 * This program is free software; you can redistribute it and/or modify
73 * it under the terms of the GNU General Public License as published by
74 * the Free Software Foundation; either version 2 of the License, or
75 * (at your option) any later version.
77 * This program is distributed in the hope that it will be useful,
78 * but WITHOUT ANY WARRANTY; without even the implied warranty of
79 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
80 * GNU General Public License for more details.
82 * You should have received a copy of the GNU General Public License
83 * along with this program; if not, write to the Free Software
84 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
87 #include <linux/module.h>
88 #include <linux/init.h>
89 #include <linux/slab.h>
90 #include <linux/jiffies.h>
91 #include <linux/i2c.h>
92 #include <linux/hwmon-sysfs.h>
93 #include <linux/hwmon.h>
94 #include <linux/err.h>
95 #include <linux/mutex.h>
96 #include <linux/sysfs.h>
97 #include <linux/interrupt.h>
98 #include <linux/regulator/consumer.h>
102 * Address is fully defined internally and cannot be changed except for
103 * MAX6659, MAX6680 and MAX6681.
104 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
105 * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
106 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
108 * MAX6647 has address 0x4e.
109 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
110 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
111 * 0x4c, 0x4d or 0x4e.
112 * SA56004 can have address 0x48 through 0x4F.
115 static const unsigned short normal_i2c[] = {
116 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
117 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
119 enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
120 max6646, w83l771, max6696, sa56004, g781, tmp451 };
126 #define LM90_REG_R_MAN_ID 0xFE
127 #define LM90_REG_R_CHIP_ID 0xFF
128 #define LM90_REG_R_CONFIG1 0x03
129 #define LM90_REG_W_CONFIG1 0x09
130 #define LM90_REG_R_CONFIG2 0xBF
131 #define LM90_REG_W_CONFIG2 0xBF
132 #define LM90_REG_R_CONVRATE 0x04
133 #define LM90_REG_W_CONVRATE 0x0A
134 #define LM90_REG_R_STATUS 0x02
135 #define LM90_REG_R_LOCAL_TEMP 0x00
136 #define LM90_REG_R_LOCAL_HIGH 0x05
137 #define LM90_REG_W_LOCAL_HIGH 0x0B
138 #define LM90_REG_R_LOCAL_LOW 0x06
139 #define LM90_REG_W_LOCAL_LOW 0x0C
140 #define LM90_REG_R_LOCAL_CRIT 0x20
141 #define LM90_REG_W_LOCAL_CRIT 0x20
142 #define LM90_REG_R_REMOTE_TEMPH 0x01
143 #define LM90_REG_R_REMOTE_TEMPL 0x10
144 #define LM90_REG_R_REMOTE_OFFSH 0x11
145 #define LM90_REG_W_REMOTE_OFFSH 0x11
146 #define LM90_REG_R_REMOTE_OFFSL 0x12
147 #define LM90_REG_W_REMOTE_OFFSL 0x12
148 #define LM90_REG_R_REMOTE_HIGHH 0x07
149 #define LM90_REG_W_REMOTE_HIGHH 0x0D
150 #define LM90_REG_R_REMOTE_HIGHL 0x13
151 #define LM90_REG_W_REMOTE_HIGHL 0x13
152 #define LM90_REG_R_REMOTE_LOWH 0x08
153 #define LM90_REG_W_REMOTE_LOWH 0x0E
154 #define LM90_REG_R_REMOTE_LOWL 0x14
155 #define LM90_REG_W_REMOTE_LOWL 0x14
156 #define LM90_REG_R_REMOTE_CRIT 0x19
157 #define LM90_REG_W_REMOTE_CRIT 0x19
158 #define LM90_REG_R_TCRIT_HYST 0x21
159 #define LM90_REG_W_TCRIT_HYST 0x21
161 /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
163 #define MAX6657_REG_R_LOCAL_TEMPL 0x11
164 #define MAX6696_REG_R_STATUS2 0x12
165 #define MAX6659_REG_R_REMOTE_EMERG 0x16
166 #define MAX6659_REG_W_REMOTE_EMERG 0x16
167 #define MAX6659_REG_R_LOCAL_EMERG 0x17
168 #define MAX6659_REG_W_LOCAL_EMERG 0x17
170 /* SA56004 registers */
172 #define SA56004_REG_R_LOCAL_TEMPL 0x22
174 #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
175 #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
177 /* TMP451 registers */
178 #define TMP451_REG_R_LOCAL_TEMPL 0x15
183 #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
184 /* Device features */
185 #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
186 #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
187 #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
188 #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
189 #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
190 #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
193 #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */
194 #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */
195 #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */
196 #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */
197 #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */
198 #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */
199 #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */
201 #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */
202 #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */
203 #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */
204 #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */
205 #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */
206 #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */
207 #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */
210 * Driver data (common to all clients)
213 static const struct i2c_device_id lm90_id[] = {
214 { "adm1032", adm1032 },
215 { "adt7461", adt7461 },
216 { "adt7461a", adt7461 },
222 { "max6646", max6646 },
223 { "max6647", max6646 },
224 { "max6649", max6646 },
225 { "max6657", max6657 },
226 { "max6658", max6657 },
227 { "max6659", max6659 },
228 { "max6680", max6680 },
229 { "max6681", max6680 },
230 { "max6695", max6696 },
231 { "max6696", max6696 },
232 { "nct1008", adt7461 },
233 { "w83l771", w83l771 },
234 { "sa56004", sa56004 },
235 { "tmp451", tmp451 },
238 MODULE_DEVICE_TABLE(i2c, lm90_id);
241 * chip type specific parameters
244 u32 flags; /* Capabilities */
245 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
246 /* Upper 8 bits for max6695/96 */
247 u8 max_convrate; /* Maximum conversion rate register value */
248 u8 reg_local_ext; /* Extended local temp register (optional) */
251 static const struct lm90_params lm90_params[] = {
253 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
254 | LM90_HAVE_BROKEN_ALERT,
255 .alert_alarms = 0x7c,
259 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
260 | LM90_HAVE_BROKEN_ALERT,
261 .alert_alarms = 0x7c,
265 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
266 | LM90_HAVE_BROKEN_ALERT,
267 .alert_alarms = 0x7c,
271 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
272 .alert_alarms = 0x7b,
276 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
277 .alert_alarms = 0x7b,
281 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
282 .alert_alarms = 0x7b,
286 .alert_alarms = 0x7c,
288 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
291 .alert_alarms = 0x7c,
293 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
296 .flags = LM90_HAVE_EMERGENCY,
297 .alert_alarms = 0x7c,
299 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
302 .flags = LM90_HAVE_OFFSET,
303 .alert_alarms = 0x7c,
307 .flags = LM90_HAVE_EMERGENCY
308 | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
309 .alert_alarms = 0x1c7c,
311 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
314 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
315 .alert_alarms = 0x7c,
319 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
320 .alert_alarms = 0x7b,
322 .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
325 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
326 | LM90_HAVE_BROKEN_ALERT,
327 .alert_alarms = 0x7c,
329 .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL,
334 * TEMP8 register index
336 enum lm90_temp8_reg_index {
341 LOCAL_EMERG, /* max6659 and max6695/96 */
342 REMOTE_EMERG, /* max6659 and max6695/96 */
343 REMOTE2_CRIT, /* max6695/96 only */
344 REMOTE2_EMERG, /* max6695/96 only */
349 * TEMP11 register index
351 enum lm90_temp11_reg_index {
355 REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */
357 REMOTE2_TEMP, /* max6695/96 only */
358 REMOTE2_LOW, /* max6695/96 only */
359 REMOTE2_HIGH, /* max6695/96 only */
364 * Client data (each client gets its own)
368 struct i2c_client *client;
369 struct device *hwmon_dev;
370 const struct attribute_group *groups[6];
371 struct mutex update_lock;
372 char valid; /* zero until following fields are valid */
373 unsigned long last_updated; /* in jiffies */
377 unsigned int update_interval; /* in milliseconds */
379 u8 config_orig; /* Original configuration register value */
380 u8 convrate_orig; /* Original conversion rate register value */
381 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
382 /* Upper 8 bits for max6695/96 */
383 u8 max_convrate; /* Maximum conversion rate */
384 u8 reg_local_ext; /* local extension register offset */
386 /* registers values */
387 s8 temp8[TEMP8_REG_NUM];
388 s16 temp11[TEMP11_REG_NUM];
390 u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
398 * The ADM1032 supports PEC but not on write byte transactions, so we need
399 * to explicitly ask for a transaction without PEC.
401 static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
403 return i2c_smbus_xfer(client->adapter, client->addr,
404 client->flags & ~I2C_CLIENT_PEC,
405 I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
409 * It is assumed that client->update_lock is held (unless we are in
410 * detection or initialization steps). This matters when PEC is enabled,
411 * because we don't want the address pointer to change between the write
412 * byte and the read byte transactions.
414 static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value)
418 if (client->flags & I2C_CLIENT_PEC) {
419 err = adm1032_write_byte(client, reg);
421 err = i2c_smbus_read_byte(client);
423 err = i2c_smbus_read_byte_data(client, reg);
426 dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
435 static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
441 * There is a trick here. We have to read two registers to have the
442 * sensor temperature, but we have to beware a conversion could occur
443 * between the readings. The datasheet says we should either use
444 * the one-shot conversion register, which we don't want to do
445 * (disables hardware monitoring) or monitor the busy bit, which is
446 * impossible (we can't read the values and monitor that bit at the
447 * exact same time). So the solution used here is to read the high
448 * byte once, then the low byte, then the high byte again. If the new
449 * high byte matches the old one, then we have a valid reading. Else
450 * we have to read the low byte again, and now we believe we have a
453 if ((err = lm90_read_reg(client, regh, &oldh))
454 || (err = lm90_read_reg(client, regl, &l))
455 || (err = lm90_read_reg(client, regh, &newh)))
458 err = lm90_read_reg(client, regl, &l);
462 *value = (newh << 8) | l;
468 * client->update_lock must be held when calling this function (unless we are
469 * in detection or initialization steps), and while a remote channel other
470 * than channel 0 is selected. Also, calling code must make sure to re-select
471 * external channel 0 before releasing the lock. This is necessary because
472 * various registers have different meanings as a result of selecting a
473 * non-default remote channel.
475 static inline void lm90_select_remote_channel(struct i2c_client *client,
476 struct lm90_data *data,
481 if (data->kind == max6696) {
482 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
486 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
492 * Set conversion rate.
493 * client->update_lock must be held when calling this function (unless we are
494 * in detection or initialization steps).
496 static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
497 unsigned int interval)
500 unsigned int update_interval;
502 /* Shift calculations to avoid rounding errors */
505 /* find the nearest update rate */
506 for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
507 i < data->max_convrate; i++, update_interval >>= 1)
508 if (interval >= update_interval * 3 / 4)
511 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
512 data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
515 static struct lm90_data *lm90_update_device(struct device *dev)
517 struct lm90_data *data = dev_get_drvdata(dev);
518 struct i2c_client *client = data->client;
519 unsigned long next_update;
521 mutex_lock(&data->update_lock);
523 next_update = data->last_updated +
524 msecs_to_jiffies(data->update_interval);
525 if (time_after(jiffies, next_update) || !data->valid) {
529 dev_dbg(&client->dev, "Updating lm90 data.\n");
530 lm90_read_reg(client, LM90_REG_R_LOCAL_LOW,
531 &data->temp8[LOCAL_LOW]);
532 lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH,
533 &data->temp8[LOCAL_HIGH]);
534 lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT,
535 &data->temp8[LOCAL_CRIT]);
536 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
537 &data->temp8[REMOTE_CRIT]);
538 lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
540 if (data->reg_local_ext) {
541 lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
543 &data->temp11[LOCAL_TEMP]);
545 if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
547 data->temp11[LOCAL_TEMP] = h << 8;
549 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
550 LM90_REG_R_REMOTE_TEMPL,
551 &data->temp11[REMOTE_TEMP]);
553 if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
554 data->temp11[REMOTE_LOW] = h << 8;
555 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
556 && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
558 data->temp11[REMOTE_LOW] |= l;
560 if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
561 data->temp11[REMOTE_HIGH] = h << 8;
562 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
563 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
565 data->temp11[REMOTE_HIGH] |= l;
568 if (data->flags & LM90_HAVE_OFFSET) {
569 if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
571 && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
573 data->temp11[REMOTE_OFFSET] = (h << 8) | l;
575 if (data->flags & LM90_HAVE_EMERGENCY) {
576 lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
577 &data->temp8[LOCAL_EMERG]);
578 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
579 &data->temp8[REMOTE_EMERG]);
581 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
582 data->alarms = alarms; /* save as 16 bit value */
584 if (data->kind == max6696) {
585 lm90_select_remote_channel(client, data, 1);
586 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
587 &data->temp8[REMOTE2_CRIT]);
588 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
589 &data->temp8[REMOTE2_EMERG]);
590 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
591 LM90_REG_R_REMOTE_TEMPL,
592 &data->temp11[REMOTE2_TEMP]);
593 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
594 data->temp11[REMOTE2_LOW] = h << 8;
595 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
596 data->temp11[REMOTE2_HIGH] = h << 8;
597 lm90_select_remote_channel(client, data, 0);
599 if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
601 data->alarms |= alarms << 8;
605 * Re-enable ALERT# output if it was originally enabled and
606 * relevant alarms are all clear
608 if ((data->config_orig & 0x80) == 0
609 && (data->alarms & data->alert_alarms) == 0) {
612 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
614 dev_dbg(&client->dev, "Re-enabling ALERT#\n");
615 i2c_smbus_write_byte_data(client,
621 data->last_updated = jiffies;
625 mutex_unlock(&data->update_lock);
632 * For local temperatures and limits, critical limits and the hysteresis
633 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
634 * For remote temperatures and limits, it uses signed 11-bit values with
635 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
636 * Maxim chips use unsigned values.
639 static inline int temp_from_s8(s8 val)
644 static inline int temp_from_u8(u8 val)
649 static inline int temp_from_s16(s16 val)
651 return val / 32 * 125;
654 static inline int temp_from_u16(u16 val)
656 return val / 32 * 125;
659 static s8 temp_to_s8(long val)
666 return (val - 500) / 1000;
667 return (val + 500) / 1000;
670 static u8 temp_to_u8(long val)
676 return (val + 500) / 1000;
679 static s16 temp_to_s16(long val)
686 return (val - 62) / 125 * 32;
687 return (val + 62) / 125 * 32;
690 static u8 hyst_to_reg(long val)
696 return (val + 500) / 1000;
700 * ADT7461 in compatibility mode is almost identical to LM90 except that
701 * attempts to write values that are outside the range 0 < temp < 127 are
702 * treated as the boundary value.
704 * ADT7461 in "extended mode" operation uses unsigned integers offset by
705 * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
707 static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
709 if (data->flags & LM90_FLAG_ADT7461_EXT)
710 return (val - 64) * 1000;
712 return temp_from_s8(val);
715 static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
717 if (data->flags & LM90_FLAG_ADT7461_EXT)
718 return (val - 0x4000) / 64 * 250;
720 return temp_from_s16(val);
723 static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
725 if (data->flags & LM90_FLAG_ADT7461_EXT) {
730 return (val + 500 + 64000) / 1000;
736 return (val + 500) / 1000;
740 static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
742 if (data->flags & LM90_FLAG_ADT7461_EXT) {
747 return (val + 64000 + 125) / 250 * 64;
753 return (val + 125) / 250 * 64;
761 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
764 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
765 struct lm90_data *data = lm90_update_device(dev);
768 if (data->kind == adt7461 || data->kind == tmp451)
769 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
770 else if (data->kind == max6646)
771 temp = temp_from_u8(data->temp8[attr->index]);
773 temp = temp_from_s8(data->temp8[attr->index]);
775 /* +16 degrees offset for temp2 for the LM99 */
776 if (data->kind == lm99 && attr->index == 3)
779 return sprintf(buf, "%d\n", temp);
782 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
783 const char *buf, size_t count)
785 static const u8 reg[TEMP8_REG_NUM] = {
786 LM90_REG_W_LOCAL_LOW,
787 LM90_REG_W_LOCAL_HIGH,
788 LM90_REG_W_LOCAL_CRIT,
789 LM90_REG_W_REMOTE_CRIT,
790 MAX6659_REG_W_LOCAL_EMERG,
791 MAX6659_REG_W_REMOTE_EMERG,
792 LM90_REG_W_REMOTE_CRIT,
793 MAX6659_REG_W_REMOTE_EMERG,
796 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
797 struct lm90_data *data = dev_get_drvdata(dev);
798 struct i2c_client *client = data->client;
799 int nr = attr->index;
803 err = kstrtol(buf, 10, &val);
807 /* +16 degrees offset for temp2 for the LM99 */
808 if (data->kind == lm99 && attr->index == 3)
811 mutex_lock(&data->update_lock);
812 if (data->kind == adt7461 || data->kind == tmp451)
813 data->temp8[nr] = temp_to_u8_adt7461(data, val);
814 else if (data->kind == max6646)
815 data->temp8[nr] = temp_to_u8(val);
817 data->temp8[nr] = temp_to_s8(val);
819 lm90_select_remote_channel(client, data, nr >= 6);
820 i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
821 lm90_select_remote_channel(client, data, 0);
823 mutex_unlock(&data->update_lock);
827 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
830 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
831 struct lm90_data *data = lm90_update_device(dev);
834 if (data->kind == adt7461 || data->kind == tmp451)
835 temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
836 else if (data->kind == max6646)
837 temp = temp_from_u16(data->temp11[attr->index]);
839 temp = temp_from_s16(data->temp11[attr->index]);
841 /* +16 degrees offset for temp2 for the LM99 */
842 if (data->kind == lm99 && attr->index <= 2)
845 return sprintf(buf, "%d\n", temp);
848 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
849 const char *buf, size_t count)
856 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 },
857 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 },
858 { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 },
859 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 },
860 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
863 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
864 struct lm90_data *data = dev_get_drvdata(dev);
865 struct i2c_client *client = data->client;
867 int index = attr->index;
871 err = kstrtol(buf, 10, &val);
875 /* +16 degrees offset for temp2 for the LM99 */
876 if (data->kind == lm99 && index <= 2)
879 mutex_lock(&data->update_lock);
880 if (data->kind == adt7461 || data->kind == tmp451)
881 data->temp11[index] = temp_to_u16_adt7461(data, val);
882 else if (data->kind == max6646)
883 data->temp11[index] = temp_to_u8(val) << 8;
884 else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
885 data->temp11[index] = temp_to_s16(val);
887 data->temp11[index] = temp_to_s8(val) << 8;
889 lm90_select_remote_channel(client, data, reg[nr].channel);
890 i2c_smbus_write_byte_data(client, reg[nr].high,
891 data->temp11[index] >> 8);
892 if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
893 i2c_smbus_write_byte_data(client, reg[nr].low,
894 data->temp11[index] & 0xff);
895 lm90_select_remote_channel(client, data, 0);
897 mutex_unlock(&data->update_lock);
901 static ssize_t show_temphyst(struct device *dev,
902 struct device_attribute *devattr,
905 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
906 struct lm90_data *data = lm90_update_device(dev);
909 if (data->kind == adt7461 || data->kind == tmp451)
910 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
911 else if (data->kind == max6646)
912 temp = temp_from_u8(data->temp8[attr->index]);
914 temp = temp_from_s8(data->temp8[attr->index]);
916 /* +16 degrees offset for temp2 for the LM99 */
917 if (data->kind == lm99 && attr->index == 3)
920 return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
923 static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
924 const char *buf, size_t count)
926 struct lm90_data *data = dev_get_drvdata(dev);
927 struct i2c_client *client = data->client;
932 err = kstrtol(buf, 10, &val);
936 mutex_lock(&data->update_lock);
937 if (data->kind == adt7461 || data->kind == tmp451)
938 temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]);
939 else if (data->kind == max6646)
940 temp = temp_from_u8(data->temp8[LOCAL_CRIT]);
942 temp = temp_from_s8(data->temp8[LOCAL_CRIT]);
944 data->temp_hyst = hyst_to_reg(temp - val);
945 i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
947 mutex_unlock(&data->update_lock);
951 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
954 struct lm90_data *data = lm90_update_device(dev);
955 return sprintf(buf, "%d\n", data->alarms);
958 static ssize_t show_alarm(struct device *dev, struct device_attribute
961 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
962 struct lm90_data *data = lm90_update_device(dev);
963 int bitnr = attr->index;
965 return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
968 static ssize_t show_update_interval(struct device *dev,
969 struct device_attribute *attr, char *buf)
971 struct lm90_data *data = dev_get_drvdata(dev);
973 return sprintf(buf, "%u\n", data->update_interval);
976 static ssize_t set_update_interval(struct device *dev,
977 struct device_attribute *attr,
978 const char *buf, size_t count)
980 struct lm90_data *data = dev_get_drvdata(dev);
981 struct i2c_client *client = data->client;
985 err = kstrtoul(buf, 10, &val);
989 mutex_lock(&data->update_lock);
990 lm90_set_convrate(client, data, clamp_val(val, 0, 100000));
991 mutex_unlock(&data->update_lock);
996 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL,
998 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL,
1000 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
1001 set_temp8, LOCAL_LOW);
1002 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
1003 set_temp11, 0, REMOTE_LOW);
1004 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
1005 set_temp8, LOCAL_HIGH);
1006 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
1007 set_temp11, 1, REMOTE_HIGH);
1008 static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
1009 set_temp8, LOCAL_CRIT);
1010 static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
1011 set_temp8, REMOTE_CRIT);
1012 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
1013 set_temphyst, LOCAL_CRIT);
1014 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL,
1016 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
1017 set_temp11, 2, REMOTE_OFFSET);
1019 /* Individual alarm files */
1020 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
1021 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
1022 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
1023 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
1024 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
1025 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
1026 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
1027 /* Raw alarm file for compatibility */
1028 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1030 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
1031 set_update_interval);
1033 static struct attribute *lm90_attributes[] = {
1034 &sensor_dev_attr_temp1_input.dev_attr.attr,
1035 &sensor_dev_attr_temp2_input.dev_attr.attr,
1036 &sensor_dev_attr_temp1_min.dev_attr.attr,
1037 &sensor_dev_attr_temp2_min.dev_attr.attr,
1038 &sensor_dev_attr_temp1_max.dev_attr.attr,
1039 &sensor_dev_attr_temp2_max.dev_attr.attr,
1040 &sensor_dev_attr_temp1_crit.dev_attr.attr,
1041 &sensor_dev_attr_temp2_crit.dev_attr.attr,
1042 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1043 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1045 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
1046 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
1047 &sensor_dev_attr_temp2_fault.dev_attr.attr,
1048 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
1049 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
1050 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
1051 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
1052 &dev_attr_alarms.attr,
1053 &dev_attr_update_interval.attr,
1057 static const struct attribute_group lm90_group = {
1058 .attrs = lm90_attributes,
1061 static struct attribute *lm90_temp2_offset_attributes[] = {
1062 &sensor_dev_attr_temp2_offset.dev_attr.attr,
1066 static const struct attribute_group lm90_temp2_offset_group = {
1067 .attrs = lm90_temp2_offset_attributes,
1071 * Additional attributes for devices with emergency sensors
1073 static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
1074 set_temp8, LOCAL_EMERG);
1075 static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
1076 set_temp8, REMOTE_EMERG);
1077 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
1079 static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
1080 NULL, REMOTE_EMERG);
1082 static struct attribute *lm90_emergency_attributes[] = {
1083 &sensor_dev_attr_temp1_emergency.dev_attr.attr,
1084 &sensor_dev_attr_temp2_emergency.dev_attr.attr,
1085 &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
1086 &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr,
1090 static const struct attribute_group lm90_emergency_group = {
1091 .attrs = lm90_emergency_attributes,
1094 static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
1095 static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);
1097 static struct attribute *lm90_emergency_alarm_attributes[] = {
1098 &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
1099 &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
1103 static const struct attribute_group lm90_emergency_alarm_group = {
1104 .attrs = lm90_emergency_alarm_attributes,
1108 * Additional attributes for devices with 3 temperature sensors
1110 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL,
1112 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
1113 set_temp11, 3, REMOTE2_LOW);
1114 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
1115 set_temp11, 4, REMOTE2_HIGH);
1116 static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
1117 set_temp8, REMOTE2_CRIT);
1118 static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL,
1120 static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
1121 set_temp8, REMOTE2_EMERG);
1122 static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
1123 NULL, REMOTE2_EMERG);
1125 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
1126 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
1127 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
1128 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
1129 static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);
1131 static struct attribute *lm90_temp3_attributes[] = {
1132 &sensor_dev_attr_temp3_input.dev_attr.attr,
1133 &sensor_dev_attr_temp3_min.dev_attr.attr,
1134 &sensor_dev_attr_temp3_max.dev_attr.attr,
1135 &sensor_dev_attr_temp3_crit.dev_attr.attr,
1136 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1137 &sensor_dev_attr_temp3_emergency.dev_attr.attr,
1138 &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr,
1140 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1141 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
1142 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
1143 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
1144 &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr,
1148 static const struct attribute_group lm90_temp3_group = {
1149 .attrs = lm90_temp3_attributes,
1152 /* pec used for ADM1032 only */
1153 static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
1156 struct i2c_client *client = to_i2c_client(dev);
1157 return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
1160 static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
1161 const char *buf, size_t count)
1163 struct i2c_client *client = to_i2c_client(dev);
1167 err = kstrtol(buf, 10, &val);
1173 client->flags &= ~I2C_CLIENT_PEC;
1176 client->flags |= I2C_CLIENT_PEC;
1185 static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
1191 /* Return 0 if detection is successful, -ENODEV otherwise */
1192 static int lm90_detect(struct i2c_client *client,
1193 struct i2c_board_info *info)
1195 struct i2c_adapter *adapter = client->adapter;
1196 int address = client->addr;
1197 const char *name = NULL;
1198 int man_id, chip_id, config1, config2, convrate;
1200 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1203 /* detection and identification */
1204 man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID);
1205 chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID);
1206 config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1);
1207 convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE);
1208 if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0)
1211 if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
1212 config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2);
1216 config2 = 0; /* Make compiler happy */
1218 if ((address == 0x4C || address == 0x4D)
1219 && man_id == 0x01) { /* National Semiconductor */
1220 if ((config1 & 0x2A) == 0x00
1221 && (config2 & 0xF8) == 0x00
1222 && convrate <= 0x09) {
1224 && (chip_id & 0xF0) == 0x20) { /* LM90 */
1227 if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
1229 dev_info(&adapter->dev,
1230 "Assuming LM99 chip at 0x%02x\n",
1232 dev_info(&adapter->dev,
1233 "If it is an LM89, instantiate it "
1234 "with the new_device sysfs "
1238 && (chip_id & 0xF0) == 0x10) { /* LM86 */
1243 if ((address == 0x4C || address == 0x4D)
1244 && man_id == 0x41) { /* Analog Devices */
1245 if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
1246 && (config1 & 0x3F) == 0x00
1247 && convrate <= 0x0A) {
1250 * The ADM1032 supports PEC, but only if combined
1251 * transactions are not used.
1253 if (i2c_check_functionality(adapter,
1254 I2C_FUNC_SMBUS_BYTE))
1255 info->flags |= I2C_CLIENT_PEC;
1257 if (chip_id == 0x51 /* ADT7461 */
1258 && (config1 & 0x1B) == 0x00
1259 && convrate <= 0x0A) {
1262 if (chip_id == 0x57 /* ADT7461A, NCT1008 */
1263 && (config1 & 0x1B) == 0x00
1264 && convrate <= 0x0A) {
1268 if (man_id == 0x4D) { /* Maxim */
1269 int emerg, emerg2, status2;
1272 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
1273 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
1274 * exists, both readings will reflect the same value. Otherwise,
1275 * the readings will be different.
1277 emerg = i2c_smbus_read_byte_data(client,
1278 MAX6659_REG_R_REMOTE_EMERG);
1279 man_id = i2c_smbus_read_byte_data(client,
1281 emerg2 = i2c_smbus_read_byte_data(client,
1282 MAX6659_REG_R_REMOTE_EMERG);
1283 status2 = i2c_smbus_read_byte_data(client,
1284 MAX6696_REG_R_STATUS2);
1285 if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0)
1289 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
1290 * register. Reading from that address will return the last
1291 * read value, which in our case is those of the man_id
1292 * register. Likewise, the config1 register seems to lack a
1293 * low nibble, so the value will be those of the previous
1294 * read, so in our case those of the man_id register.
1295 * MAX6659 has a third set of upper temperature limit registers.
1296 * Those registers also return values on MAX6657 and MAX6658,
1297 * thus the only way to detect MAX6659 is by its address.
1298 * For this reason it will be mis-detected as MAX6657 if its
1301 if (chip_id == man_id
1302 && (address == 0x4C || address == 0x4D || address == 0x4E)
1303 && (config1 & 0x1F) == (man_id & 0x0F)
1304 && convrate <= 0x09) {
1305 if (address == 0x4C)
1311 * Even though MAX6695 and MAX6696 do not have a chip ID
1312 * register, reading it returns 0x01. Bit 4 of the config1
1313 * register is unused and should return zero when read. Bit 0 of
1314 * the status2 register is unused and should return zero when
1317 * MAX6695 and MAX6696 have an additional set of temperature
1318 * limit registers. We can detect those chips by checking if
1319 * one of those registers exists.
1322 && (config1 & 0x10) == 0x00
1323 && (status2 & 0x01) == 0x00
1325 && convrate <= 0x07) {
1329 * The chip_id register of the MAX6680 and MAX6681 holds the
1330 * revision of the chip. The lowest bit of the config1 register
1331 * is unused and should return zero when read, so should the
1332 * second to last bit of config1 (software reset).
1335 && (config1 & 0x03) == 0x00
1336 && convrate <= 0x07) {
1340 * The chip_id register of the MAX6646/6647/6649 holds the
1341 * revision of the chip. The lowest 6 bits of the config1
1342 * register are unused and should return zero when read.
1345 && (config1 & 0x3f) == 0x00
1346 && convrate <= 0x07) {
1351 && man_id == 0x5C) { /* Winbond/Nuvoton */
1352 if ((config1 & 0x2A) == 0x00
1353 && (config2 & 0xF8) == 0x00) {
1354 if (chip_id == 0x01 /* W83L771W/G */
1355 && convrate <= 0x09) {
1358 if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
1359 && convrate <= 0x08) {
1364 if (address >= 0x48 && address <= 0x4F
1365 && man_id == 0xA1) { /* NXP Semiconductor/Philips */
1367 && (config1 & 0x2A) == 0x00
1368 && (config2 & 0xFE) == 0x00
1369 && convrate <= 0x09) {
1373 if ((address == 0x4C || address == 0x4D)
1374 && man_id == 0x47) { /* GMT */
1375 if (chip_id == 0x01 /* G781 */
1376 && (config1 & 0x3F) == 0x00
1377 && convrate <= 0x08)
1381 && man_id == 0x55) { /* Texas Instruments */
1384 local_ext = i2c_smbus_read_byte_data(client,
1385 TMP451_REG_R_LOCAL_TEMPL);
1387 if (chip_id == 0x00 /* TMP451 */
1388 && (config1 & 0x1B) == 0x00
1390 && (local_ext & 0x0F) == 0x00)
1394 if (!name) { /* identification failed */
1395 dev_dbg(&adapter->dev,
1396 "Unsupported chip at 0x%02x (man_id=0x%02X, "
1397 "chip_id=0x%02X)\n", address, man_id, chip_id);
1401 strlcpy(info->type, name, I2C_NAME_SIZE);
1406 static void lm90_restore_conf(void *_data)
1408 struct lm90_data *data = _data;
1409 struct i2c_client *client = data->client;
1411 /* Restore initial configuration */
1412 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
1413 data->convrate_orig);
1414 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1418 static void lm90_init_client(struct i2c_client *client, struct lm90_data *data)
1420 u8 config, convrate;
1422 if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
1423 dev_warn(&client->dev, "Failed to read convrate register!\n");
1424 convrate = LM90_DEF_CONVRATE_RVAL;
1426 data->convrate_orig = convrate;
1429 * Start the conversions.
1431 lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
1432 if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
1433 dev_warn(&client->dev, "Initialization failed!\n");
1436 data->config_orig = config;
1438 /* Check Temperature Range Select */
1439 if (data->kind == adt7461 || data->kind == tmp451) {
1441 data->flags |= LM90_FLAG_ADT7461_EXT;
1445 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
1446 * 0.125 degree resolution) and range (0x08, extend range
1447 * to -64 degree) mode for the remote temperature sensor.
1449 if (data->kind == max6680)
1453 * Select external channel 0 for max6695/96
1455 if (data->kind == max6696)
1458 config &= 0xBF; /* run */
1459 if (config != data->config_orig) /* Only write if changed */
1460 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
1462 devm_add_action(&client->dev, lm90_restore_conf, data);
1465 static bool lm90_is_tripped(struct i2c_client *client, u16 *status)
1467 struct lm90_data *data = i2c_get_clientdata(client);
1470 lm90_read_reg(client, LM90_REG_R_STATUS, &st);
1472 if (data->kind == max6696)
1473 lm90_read_reg(client, MAX6696_REG_R_STATUS2, &st2);
1475 *status = st | (st2 << 8);
1477 if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0)
1480 if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) ||
1481 (st2 & MAX6696_STATUS2_LOT2))
1482 dev_warn(&client->dev,
1483 "temp%d out of range, please check!\n", 1);
1484 if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) ||
1485 (st2 & MAX6696_STATUS2_ROT2))
1486 dev_warn(&client->dev,
1487 "temp%d out of range, please check!\n", 2);
1488 if (st & LM90_STATUS_ROPEN)
1489 dev_warn(&client->dev,
1490 "temp%d diode open, please check!\n", 2);
1491 if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH |
1492 MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2))
1493 dev_warn(&client->dev,
1494 "temp%d out of range, please check!\n", 3);
1495 if (st2 & MAX6696_STATUS2_R2OPEN)
1496 dev_warn(&client->dev,
1497 "temp%d diode open, please check!\n", 3);
1502 static irqreturn_t lm90_irq_thread(int irq, void *dev_id)
1504 struct i2c_client *client = dev_id;
1507 if (lm90_is_tripped(client, &status))
1513 static void lm90_remove_pec(void *dev)
1515 device_remove_file(dev, &dev_attr_pec);
1518 static void lm90_regulator_disable(void *regulator)
1520 regulator_disable(regulator);
1523 static int lm90_probe(struct i2c_client *client,
1524 const struct i2c_device_id *id)
1526 struct device *dev = &client->dev;
1527 struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);
1528 struct lm90_data *data;
1529 struct regulator *regulator;
1533 regulator = devm_regulator_get(dev, "vcc");
1534 if (IS_ERR(regulator))
1535 return PTR_ERR(regulator);
1537 err = regulator_enable(regulator);
1539 dev_err(dev, "Failed to enable regulator: %d\n", err);
1543 devm_add_action(dev, lm90_regulator_disable, regulator);
1545 data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL);
1549 data->client = client;
1550 i2c_set_clientdata(client, data);
1551 mutex_init(&data->update_lock);
1553 /* Set the device type */
1554 data->kind = id->driver_data;
1555 if (data->kind == adm1032) {
1556 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
1557 client->flags &= ~I2C_CLIENT_PEC;
1561 * Different devices have different alarm bits triggering the
1564 data->alert_alarms = lm90_params[data->kind].alert_alarms;
1566 /* Set chip capabilities */
1567 data->flags = lm90_params[data->kind].flags;
1568 data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
1570 /* Set maximum conversion rate */
1571 data->max_convrate = lm90_params[data->kind].max_convrate;
1573 /* Initialize the LM90 chip */
1574 lm90_init_client(client, data);
1576 /* Register sysfs hooks */
1577 data->groups[groups++] = &lm90_group;
1579 if (data->flags & LM90_HAVE_OFFSET)
1580 data->groups[groups++] = &lm90_temp2_offset_group;
1582 if (data->flags & LM90_HAVE_EMERGENCY)
1583 data->groups[groups++] = &lm90_emergency_group;
1585 if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
1586 data->groups[groups++] = &lm90_emergency_alarm_group;
1588 if (data->flags & LM90_HAVE_TEMP3)
1589 data->groups[groups++] = &lm90_temp3_group;
1591 if (client->flags & I2C_CLIENT_PEC) {
1592 err = device_create_file(dev, &dev_attr_pec);
1595 devm_add_action(dev, lm90_remove_pec, dev);
1598 data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
1599 data, data->groups);
1600 if (IS_ERR(data->hwmon_dev))
1601 return PTR_ERR(data->hwmon_dev);
1604 dev_dbg(dev, "IRQ: %d\n", client->irq);
1605 err = devm_request_threaded_irq(dev, client->irq,
1606 NULL, lm90_irq_thread,
1607 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
1610 dev_err(dev, "cannot request IRQ %d\n", client->irq);
1611 goto exit_unregister;
1618 hwmon_device_unregister(data->hwmon_dev);
1622 static int lm90_remove(struct i2c_client *client)
1624 struct lm90_data *data = i2c_get_clientdata(client);
1626 hwmon_device_unregister(data->hwmon_dev);
1631 static void lm90_alert(struct i2c_client *client, unsigned int flag)
1635 if (lm90_is_tripped(client, &alarms)) {
1637 * Disable ALERT# output, because these chips don't implement
1638 * SMBus alert correctly; they should only hold the alert line
1641 struct lm90_data *data = i2c_get_clientdata(client);
1643 if ((data->flags & LM90_HAVE_BROKEN_ALERT)
1644 && (alarms & data->alert_alarms)) {
1646 dev_dbg(&client->dev, "Disabling ALERT#\n");
1647 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
1648 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1652 dev_info(&client->dev, "Everything OK\n");
1656 static struct i2c_driver lm90_driver = {
1657 .class = I2C_CLASS_HWMON,
1661 .probe = lm90_probe,
1662 .remove = lm90_remove,
1663 .alert = lm90_alert,
1664 .id_table = lm90_id,
1665 .detect = lm90_detect,
1666 .address_list = normal_i2c,
1669 module_i2c_driver(lm90_driver);
1671 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1672 MODULE_DESCRIPTION("LM90/ADM1032 driver");
1673 MODULE_LICENSE("GPL");