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 * 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>
101 * Address is fully defined internally and cannot be changed except for
102 * MAX6659, MAX6680 and MAX6681.
103 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
104 * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
105 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
107 * MAX6647 has address 0x4e.
108 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
109 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
110 * 0x4c, 0x4d or 0x4e.
111 * SA56004 can have address 0x48 through 0x4F.
114 static const unsigned short normal_i2c[] = {
115 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
116 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
118 enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
119 max6646, w83l771, max6696, sa56004, g781, tmp451 };
125 #define LM90_REG_R_MAN_ID 0xFE
126 #define LM90_REG_R_CHIP_ID 0xFF
127 #define LM90_REG_R_CONFIG1 0x03
128 #define LM90_REG_W_CONFIG1 0x09
129 #define LM90_REG_R_CONFIG2 0xBF
130 #define LM90_REG_W_CONFIG2 0xBF
131 #define LM90_REG_R_CONVRATE 0x04
132 #define LM90_REG_W_CONVRATE 0x0A
133 #define LM90_REG_R_STATUS 0x02
134 #define LM90_REG_R_LOCAL_TEMP 0x00
135 #define LM90_REG_R_LOCAL_HIGH 0x05
136 #define LM90_REG_W_LOCAL_HIGH 0x0B
137 #define LM90_REG_R_LOCAL_LOW 0x06
138 #define LM90_REG_W_LOCAL_LOW 0x0C
139 #define LM90_REG_R_LOCAL_CRIT 0x20
140 #define LM90_REG_W_LOCAL_CRIT 0x20
141 #define LM90_REG_R_REMOTE_TEMPH 0x01
142 #define LM90_REG_R_REMOTE_TEMPL 0x10
143 #define LM90_REG_R_REMOTE_OFFSH 0x11
144 #define LM90_REG_W_REMOTE_OFFSH 0x11
145 #define LM90_REG_R_REMOTE_OFFSL 0x12
146 #define LM90_REG_W_REMOTE_OFFSL 0x12
147 #define LM90_REG_R_REMOTE_HIGHH 0x07
148 #define LM90_REG_W_REMOTE_HIGHH 0x0D
149 #define LM90_REG_R_REMOTE_HIGHL 0x13
150 #define LM90_REG_W_REMOTE_HIGHL 0x13
151 #define LM90_REG_R_REMOTE_LOWH 0x08
152 #define LM90_REG_W_REMOTE_LOWH 0x0E
153 #define LM90_REG_R_REMOTE_LOWL 0x14
154 #define LM90_REG_W_REMOTE_LOWL 0x14
155 #define LM90_REG_R_REMOTE_CRIT 0x19
156 #define LM90_REG_W_REMOTE_CRIT 0x19
157 #define LM90_REG_R_TCRIT_HYST 0x21
158 #define LM90_REG_W_TCRIT_HYST 0x21
160 /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
162 #define MAX6657_REG_R_LOCAL_TEMPL 0x11
163 #define MAX6696_REG_R_STATUS2 0x12
164 #define MAX6659_REG_R_REMOTE_EMERG 0x16
165 #define MAX6659_REG_W_REMOTE_EMERG 0x16
166 #define MAX6659_REG_R_LOCAL_EMERG 0x17
167 #define MAX6659_REG_W_LOCAL_EMERG 0x17
169 /* SA56004 registers */
171 #define SA56004_REG_R_LOCAL_TEMPL 0x22
173 #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
174 #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
176 /* TMP451 registers */
177 #define TMP451_REG_R_LOCAL_TEMPL 0x15
182 #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
183 /* Device features */
184 #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
185 #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
186 #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
187 #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
188 #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
189 #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
192 #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */
193 #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */
194 #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */
195 #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */
196 #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */
197 #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */
198 #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */
200 #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */
201 #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */
202 #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */
203 #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */
204 #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */
205 #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */
206 #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */
209 * Driver data (common to all clients)
212 static const struct i2c_device_id lm90_id[] = {
213 { "adm1032", adm1032 },
214 { "adt7461", adt7461 },
215 { "adt7461a", adt7461 },
221 { "max6646", max6646 },
222 { "max6647", max6646 },
223 { "max6649", max6646 },
224 { "max6657", max6657 },
225 { "max6658", max6657 },
226 { "max6659", max6659 },
227 { "max6680", max6680 },
228 { "max6681", max6680 },
229 { "max6695", max6696 },
230 { "max6696", max6696 },
231 { "nct1008", adt7461 },
232 { "w83l771", w83l771 },
233 { "sa56004", sa56004 },
234 { "tmp451", tmp451 },
237 MODULE_DEVICE_TABLE(i2c, lm90_id);
240 * chip type specific parameters
243 u32 flags; /* Capabilities */
244 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
245 /* Upper 8 bits for max6695/96 */
246 u8 max_convrate; /* Maximum conversion rate register value */
247 u8 reg_local_ext; /* Extended local temp register (optional) */
250 static const struct lm90_params lm90_params[] = {
252 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
253 | LM90_HAVE_BROKEN_ALERT,
254 .alert_alarms = 0x7c,
258 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
259 | LM90_HAVE_BROKEN_ALERT,
260 .alert_alarms = 0x7c,
264 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
265 | LM90_HAVE_BROKEN_ALERT,
266 .alert_alarms = 0x7c,
270 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
271 .alert_alarms = 0x7b,
275 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
276 .alert_alarms = 0x7b,
280 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
281 .alert_alarms = 0x7b,
285 .alert_alarms = 0x7c,
287 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
290 .alert_alarms = 0x7c,
292 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
295 .flags = LM90_HAVE_EMERGENCY,
296 .alert_alarms = 0x7c,
298 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
301 .flags = LM90_HAVE_OFFSET,
302 .alert_alarms = 0x7c,
306 .flags = LM90_HAVE_EMERGENCY
307 | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
308 .alert_alarms = 0x1c7c,
310 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
313 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
314 .alert_alarms = 0x7c,
318 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
319 .alert_alarms = 0x7b,
321 .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
324 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
325 | LM90_HAVE_BROKEN_ALERT,
326 .alert_alarms = 0x7c,
328 .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL,
333 * TEMP8 register index
335 enum lm90_temp8_reg_index {
340 LOCAL_EMERG, /* max6659 and max6695/96 */
341 REMOTE_EMERG, /* max6659 and max6695/96 */
342 REMOTE2_CRIT, /* max6695/96 only */
343 REMOTE2_EMERG, /* max6695/96 only */
348 * TEMP11 register index
350 enum lm90_temp11_reg_index {
354 REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */
356 REMOTE2_TEMP, /* max6695/96 only */
357 REMOTE2_LOW, /* max6695/96 only */
358 REMOTE2_HIGH, /* max6695/96 only */
363 * Client data (each client gets its own)
367 struct device *hwmon_dev;
368 struct mutex update_lock;
369 char valid; /* zero until following fields are valid */
370 unsigned long last_updated; /* in jiffies */
374 int update_interval; /* in milliseconds */
376 u8 config_orig; /* Original configuration register value */
377 u8 convrate_orig; /* Original conversion rate register value */
378 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
379 /* Upper 8 bits for max6695/96 */
380 u8 max_convrate; /* Maximum conversion rate */
381 u8 reg_local_ext; /* local extension register offset */
383 /* registers values */
384 s8 temp8[TEMP8_REG_NUM];
385 s16 temp11[TEMP11_REG_NUM];
387 u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
395 * The ADM1032 supports PEC but not on write byte transactions, so we need
396 * to explicitly ask for a transaction without PEC.
398 static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
400 return i2c_smbus_xfer(client->adapter, client->addr,
401 client->flags & ~I2C_CLIENT_PEC,
402 I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
406 * It is assumed that client->update_lock is held (unless we are in
407 * detection or initialization steps). This matters when PEC is enabled,
408 * because we don't want the address pointer to change between the write
409 * byte and the read byte transactions.
411 static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value)
415 if (client->flags & I2C_CLIENT_PEC) {
416 err = adm1032_write_byte(client, reg);
418 err = i2c_smbus_read_byte(client);
420 err = i2c_smbus_read_byte_data(client, reg);
423 dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
432 static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
438 * There is a trick here. We have to read two registers to have the
439 * sensor temperature, but we have to beware a conversion could occur
440 * between the readings. The datasheet says we should either use
441 * the one-shot conversion register, which we don't want to do
442 * (disables hardware monitoring) or monitor the busy bit, which is
443 * impossible (we can't read the values and monitor that bit at the
444 * exact same time). So the solution used here is to read the high
445 * byte once, then the low byte, then the high byte again. If the new
446 * high byte matches the old one, then we have a valid reading. Else
447 * we have to read the low byte again, and now we believe we have a
450 if ((err = lm90_read_reg(client, regh, &oldh))
451 || (err = lm90_read_reg(client, regl, &l))
452 || (err = lm90_read_reg(client, regh, &newh)))
455 err = lm90_read_reg(client, regl, &l);
459 *value = (newh << 8) | l;
465 * client->update_lock must be held when calling this function (unless we are
466 * in detection or initialization steps), and while a remote channel other
467 * than channel 0 is selected. Also, calling code must make sure to re-select
468 * external channel 0 before releasing the lock. This is necessary because
469 * various registers have different meanings as a result of selecting a
470 * non-default remote channel.
472 static inline void lm90_select_remote_channel(struct i2c_client *client,
473 struct lm90_data *data,
478 if (data->kind == max6696) {
479 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
483 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
489 * Set conversion rate.
490 * client->update_lock must be held when calling this function (unless we are
491 * in detection or initialization steps).
493 static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
494 unsigned int interval)
497 unsigned int update_interval;
499 /* Shift calculations to avoid rounding errors */
502 /* find the nearest update rate */
503 for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
504 i < data->max_convrate; i++, update_interval >>= 1)
505 if (interval >= update_interval * 3 / 4)
508 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
509 data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
512 static struct lm90_data *lm90_update_device(struct device *dev)
514 struct i2c_client *client = to_i2c_client(dev);
515 struct lm90_data *data = i2c_get_clientdata(client);
516 unsigned long next_update;
518 mutex_lock(&data->update_lock);
520 next_update = data->last_updated +
521 msecs_to_jiffies(data->update_interval);
522 if (time_after(jiffies, next_update) || !data->valid) {
526 dev_dbg(&client->dev, "Updating lm90 data.\n");
527 lm90_read_reg(client, LM90_REG_R_LOCAL_LOW,
528 &data->temp8[LOCAL_LOW]);
529 lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH,
530 &data->temp8[LOCAL_HIGH]);
531 lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT,
532 &data->temp8[LOCAL_CRIT]);
533 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
534 &data->temp8[REMOTE_CRIT]);
535 lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
537 if (data->reg_local_ext) {
538 lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
540 &data->temp11[LOCAL_TEMP]);
542 if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
544 data->temp11[LOCAL_TEMP] = h << 8;
546 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
547 LM90_REG_R_REMOTE_TEMPL,
548 &data->temp11[REMOTE_TEMP]);
550 if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
551 data->temp11[REMOTE_LOW] = h << 8;
552 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
553 && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
555 data->temp11[REMOTE_LOW] |= l;
557 if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
558 data->temp11[REMOTE_HIGH] = h << 8;
559 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
560 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
562 data->temp11[REMOTE_HIGH] |= l;
565 if (data->flags & LM90_HAVE_OFFSET) {
566 if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
568 && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
570 data->temp11[REMOTE_OFFSET] = (h << 8) | l;
572 if (data->flags & LM90_HAVE_EMERGENCY) {
573 lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
574 &data->temp8[LOCAL_EMERG]);
575 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
576 &data->temp8[REMOTE_EMERG]);
578 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
579 data->alarms = alarms; /* save as 16 bit value */
581 if (data->kind == max6696) {
582 lm90_select_remote_channel(client, data, 1);
583 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
584 &data->temp8[REMOTE2_CRIT]);
585 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
586 &data->temp8[REMOTE2_EMERG]);
587 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
588 LM90_REG_R_REMOTE_TEMPL,
589 &data->temp11[REMOTE2_TEMP]);
590 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
591 data->temp11[REMOTE2_LOW] = h << 8;
592 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
593 data->temp11[REMOTE2_HIGH] = h << 8;
594 lm90_select_remote_channel(client, data, 0);
596 if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
598 data->alarms |= alarms << 8;
602 * Re-enable ALERT# output if it was originally enabled and
603 * relevant alarms are all clear
605 if ((data->config_orig & 0x80) == 0
606 && (data->alarms & data->alert_alarms) == 0) {
609 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
611 dev_dbg(&client->dev, "Re-enabling ALERT#\n");
612 i2c_smbus_write_byte_data(client,
618 data->last_updated = jiffies;
622 mutex_unlock(&data->update_lock);
629 * For local temperatures and limits, critical limits and the hysteresis
630 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
631 * For remote temperatures and limits, it uses signed 11-bit values with
632 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
633 * Maxim chips use unsigned values.
636 static inline int temp_from_s8(s8 val)
641 static inline int temp_from_u8(u8 val)
646 static inline int temp_from_s16(s16 val)
648 return val / 32 * 125;
651 static inline int temp_from_u16(u16 val)
653 return val / 32 * 125;
656 static s8 temp_to_s8(long val)
663 return (val - 500) / 1000;
664 return (val + 500) / 1000;
667 static u8 temp_to_u8(long val)
673 return (val + 500) / 1000;
676 static s16 temp_to_s16(long val)
683 return (val - 62) / 125 * 32;
684 return (val + 62) / 125 * 32;
687 static u8 hyst_to_reg(long val)
693 return (val + 500) / 1000;
697 * ADT7461 in compatibility mode is almost identical to LM90 except that
698 * attempts to write values that are outside the range 0 < temp < 127 are
699 * treated as the boundary value.
701 * ADT7461 in "extended mode" operation uses unsigned integers offset by
702 * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
704 static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
706 if (data->flags & LM90_FLAG_ADT7461_EXT)
707 return (val - 64) * 1000;
709 return temp_from_s8(val);
712 static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
714 if (data->flags & LM90_FLAG_ADT7461_EXT)
715 return (val - 0x4000) / 64 * 250;
717 return temp_from_s16(val);
720 static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
722 if (data->flags & LM90_FLAG_ADT7461_EXT) {
727 return (val + 500 + 64000) / 1000;
733 return (val + 500) / 1000;
737 static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
739 if (data->flags & LM90_FLAG_ADT7461_EXT) {
744 return (val + 64000 + 125) / 250 * 64;
750 return (val + 125) / 250 * 64;
758 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
761 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
762 struct lm90_data *data = lm90_update_device(dev);
765 if (data->kind == adt7461 || data->kind == tmp451)
766 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
767 else if (data->kind == max6646)
768 temp = temp_from_u8(data->temp8[attr->index]);
770 temp = temp_from_s8(data->temp8[attr->index]);
772 /* +16 degrees offset for temp2 for the LM99 */
773 if (data->kind == lm99 && attr->index == 3)
776 return sprintf(buf, "%d\n", temp);
779 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
780 const char *buf, size_t count)
782 static const u8 reg[TEMP8_REG_NUM] = {
783 LM90_REG_W_LOCAL_LOW,
784 LM90_REG_W_LOCAL_HIGH,
785 LM90_REG_W_LOCAL_CRIT,
786 LM90_REG_W_REMOTE_CRIT,
787 MAX6659_REG_W_LOCAL_EMERG,
788 MAX6659_REG_W_REMOTE_EMERG,
789 LM90_REG_W_REMOTE_CRIT,
790 MAX6659_REG_W_REMOTE_EMERG,
793 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
794 struct i2c_client *client = to_i2c_client(dev);
795 struct lm90_data *data = i2c_get_clientdata(client);
796 int nr = attr->index;
800 err = kstrtol(buf, 10, &val);
804 /* +16 degrees offset for temp2 for the LM99 */
805 if (data->kind == lm99 && attr->index == 3)
808 mutex_lock(&data->update_lock);
809 if (data->kind == adt7461 || data->kind == tmp451)
810 data->temp8[nr] = temp_to_u8_adt7461(data, val);
811 else if (data->kind == max6646)
812 data->temp8[nr] = temp_to_u8(val);
814 data->temp8[nr] = temp_to_s8(val);
816 lm90_select_remote_channel(client, data, nr >= 6);
817 i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
818 lm90_select_remote_channel(client, data, 0);
820 mutex_unlock(&data->update_lock);
824 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
827 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
828 struct lm90_data *data = lm90_update_device(dev);
831 if (data->kind == adt7461 || data->kind == tmp451)
832 temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
833 else if (data->kind == max6646)
834 temp = temp_from_u16(data->temp11[attr->index]);
836 temp = temp_from_s16(data->temp11[attr->index]);
838 /* +16 degrees offset for temp2 for the LM99 */
839 if (data->kind == lm99 && attr->index <= 2)
842 return sprintf(buf, "%d\n", temp);
845 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
846 const char *buf, size_t count)
853 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 },
854 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 },
855 { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 },
856 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 },
857 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
860 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
861 struct i2c_client *client = to_i2c_client(dev);
862 struct lm90_data *data = i2c_get_clientdata(client);
864 int index = attr->index;
868 err = kstrtol(buf, 10, &val);
872 /* +16 degrees offset for temp2 for the LM99 */
873 if (data->kind == lm99 && index <= 2)
876 mutex_lock(&data->update_lock);
877 if (data->kind == adt7461 || data->kind == tmp451)
878 data->temp11[index] = temp_to_u16_adt7461(data, val);
879 else if (data->kind == max6646)
880 data->temp11[index] = temp_to_u8(val) << 8;
881 else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
882 data->temp11[index] = temp_to_s16(val);
884 data->temp11[index] = temp_to_s8(val) << 8;
886 lm90_select_remote_channel(client, data, reg[nr].channel);
887 i2c_smbus_write_byte_data(client, reg[nr].high,
888 data->temp11[index] >> 8);
889 if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
890 i2c_smbus_write_byte_data(client, reg[nr].low,
891 data->temp11[index] & 0xff);
892 lm90_select_remote_channel(client, data, 0);
894 mutex_unlock(&data->update_lock);
898 static ssize_t show_temphyst(struct device *dev,
899 struct device_attribute *devattr,
902 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
903 struct lm90_data *data = lm90_update_device(dev);
906 if (data->kind == adt7461 || data->kind == tmp451)
907 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
908 else if (data->kind == max6646)
909 temp = temp_from_u8(data->temp8[attr->index]);
911 temp = temp_from_s8(data->temp8[attr->index]);
913 /* +16 degrees offset for temp2 for the LM99 */
914 if (data->kind == lm99 && attr->index == 3)
917 return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
920 static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
921 const char *buf, size_t count)
923 struct i2c_client *client = to_i2c_client(dev);
924 struct lm90_data *data = i2c_get_clientdata(client);
929 err = kstrtol(buf, 10, &val);
933 mutex_lock(&data->update_lock);
934 if (data->kind == adt7461 || data->kind == tmp451)
935 temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]);
936 else if (data->kind == max6646)
937 temp = temp_from_u8(data->temp8[LOCAL_CRIT]);
939 temp = temp_from_s8(data->temp8[LOCAL_CRIT]);
941 data->temp_hyst = hyst_to_reg(temp - val);
942 i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
944 mutex_unlock(&data->update_lock);
948 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
951 struct lm90_data *data = lm90_update_device(dev);
952 return sprintf(buf, "%d\n", data->alarms);
955 static ssize_t show_alarm(struct device *dev, struct device_attribute
958 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
959 struct lm90_data *data = lm90_update_device(dev);
960 int bitnr = attr->index;
962 return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
965 static ssize_t show_update_interval(struct device *dev,
966 struct device_attribute *attr, char *buf)
968 struct lm90_data *data = dev_get_drvdata(dev);
970 return sprintf(buf, "%u\n", data->update_interval);
973 static ssize_t set_update_interval(struct device *dev,
974 struct device_attribute *attr,
975 const char *buf, size_t count)
977 struct i2c_client *client = to_i2c_client(dev);
978 struct lm90_data *data = i2c_get_clientdata(client);
982 err = kstrtoul(buf, 10, &val);
986 mutex_lock(&data->update_lock);
987 lm90_set_convrate(client, data, clamp_val(val, 0, 100000));
988 mutex_unlock(&data->update_lock);
993 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL,
995 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL,
997 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
998 set_temp8, LOCAL_LOW);
999 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
1000 set_temp11, 0, REMOTE_LOW);
1001 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
1002 set_temp8, LOCAL_HIGH);
1003 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
1004 set_temp11, 1, REMOTE_HIGH);
1005 static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
1006 set_temp8, LOCAL_CRIT);
1007 static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
1008 set_temp8, REMOTE_CRIT);
1009 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
1010 set_temphyst, LOCAL_CRIT);
1011 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL,
1013 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
1014 set_temp11, 2, REMOTE_OFFSET);
1016 /* Individual alarm files */
1017 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
1018 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
1019 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
1020 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
1021 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
1022 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
1023 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
1024 /* Raw alarm file for compatibility */
1025 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1027 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
1028 set_update_interval);
1030 static struct attribute *lm90_attributes[] = {
1031 &sensor_dev_attr_temp1_input.dev_attr.attr,
1032 &sensor_dev_attr_temp2_input.dev_attr.attr,
1033 &sensor_dev_attr_temp1_min.dev_attr.attr,
1034 &sensor_dev_attr_temp2_min.dev_attr.attr,
1035 &sensor_dev_attr_temp1_max.dev_attr.attr,
1036 &sensor_dev_attr_temp2_max.dev_attr.attr,
1037 &sensor_dev_attr_temp1_crit.dev_attr.attr,
1038 &sensor_dev_attr_temp2_crit.dev_attr.attr,
1039 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1040 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1042 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
1043 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
1044 &sensor_dev_attr_temp2_fault.dev_attr.attr,
1045 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
1046 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
1047 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
1048 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
1049 &dev_attr_alarms.attr,
1050 &dev_attr_update_interval.attr,
1054 static const struct attribute_group lm90_group = {
1055 .attrs = lm90_attributes,
1059 * Additional attributes for devices with emergency sensors
1061 static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
1062 set_temp8, LOCAL_EMERG);
1063 static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
1064 set_temp8, REMOTE_EMERG);
1065 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
1067 static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
1068 NULL, REMOTE_EMERG);
1070 static struct attribute *lm90_emergency_attributes[] = {
1071 &sensor_dev_attr_temp1_emergency.dev_attr.attr,
1072 &sensor_dev_attr_temp2_emergency.dev_attr.attr,
1073 &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
1074 &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr,
1078 static const struct attribute_group lm90_emergency_group = {
1079 .attrs = lm90_emergency_attributes,
1082 static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
1083 static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);
1085 static struct attribute *lm90_emergency_alarm_attributes[] = {
1086 &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
1087 &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
1091 static const struct attribute_group lm90_emergency_alarm_group = {
1092 .attrs = lm90_emergency_alarm_attributes,
1096 * Additional attributes for devices with 3 temperature sensors
1098 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL,
1100 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
1101 set_temp11, 3, REMOTE2_LOW);
1102 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
1103 set_temp11, 4, REMOTE2_HIGH);
1104 static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
1105 set_temp8, REMOTE2_CRIT);
1106 static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL,
1108 static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
1109 set_temp8, REMOTE2_EMERG);
1110 static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
1111 NULL, REMOTE2_EMERG);
1113 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
1114 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
1115 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
1116 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
1117 static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);
1119 static struct attribute *lm90_temp3_attributes[] = {
1120 &sensor_dev_attr_temp3_input.dev_attr.attr,
1121 &sensor_dev_attr_temp3_min.dev_attr.attr,
1122 &sensor_dev_attr_temp3_max.dev_attr.attr,
1123 &sensor_dev_attr_temp3_crit.dev_attr.attr,
1124 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1125 &sensor_dev_attr_temp3_emergency.dev_attr.attr,
1126 &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr,
1128 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1129 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
1130 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
1131 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
1132 &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr,
1136 static const struct attribute_group lm90_temp3_group = {
1137 .attrs = lm90_temp3_attributes,
1140 /* pec used for ADM1032 only */
1141 static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
1144 struct i2c_client *client = to_i2c_client(dev);
1145 return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
1148 static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
1149 const char *buf, size_t count)
1151 struct i2c_client *client = to_i2c_client(dev);
1155 err = kstrtol(buf, 10, &val);
1161 client->flags &= ~I2C_CLIENT_PEC;
1164 client->flags |= I2C_CLIENT_PEC;
1173 static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
1179 /* Return 0 if detection is successful, -ENODEV otherwise */
1180 static int lm90_detect(struct i2c_client *client,
1181 struct i2c_board_info *info)
1183 struct i2c_adapter *adapter = client->adapter;
1184 int address = client->addr;
1185 const char *name = NULL;
1186 int man_id, chip_id, config1, config2, convrate;
1188 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1191 /* detection and identification */
1192 man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID);
1193 chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID);
1194 config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1);
1195 convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE);
1196 if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0)
1199 if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
1200 config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2);
1204 config2 = 0; /* Make compiler happy */
1206 if ((address == 0x4C || address == 0x4D)
1207 && man_id == 0x01) { /* National Semiconductor */
1208 if ((config1 & 0x2A) == 0x00
1209 && (config2 & 0xF8) == 0x00
1210 && convrate <= 0x09) {
1212 && (chip_id & 0xF0) == 0x20) { /* LM90 */
1215 if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
1217 dev_info(&adapter->dev,
1218 "Assuming LM99 chip at 0x%02x\n",
1220 dev_info(&adapter->dev,
1221 "If it is an LM89, instantiate it "
1222 "with the new_device sysfs "
1226 && (chip_id & 0xF0) == 0x10) { /* LM86 */
1231 if ((address == 0x4C || address == 0x4D)
1232 && man_id == 0x41) { /* Analog Devices */
1233 if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
1234 && (config1 & 0x3F) == 0x00
1235 && convrate <= 0x0A) {
1238 * The ADM1032 supports PEC, but only if combined
1239 * transactions are not used.
1241 if (i2c_check_functionality(adapter,
1242 I2C_FUNC_SMBUS_BYTE))
1243 info->flags |= I2C_CLIENT_PEC;
1245 if (chip_id == 0x51 /* ADT7461 */
1246 && (config1 & 0x1B) == 0x00
1247 && convrate <= 0x0A) {
1250 if (chip_id == 0x57 /* ADT7461A, NCT1008 */
1251 && (config1 & 0x1B) == 0x00
1252 && convrate <= 0x0A) {
1256 if (man_id == 0x4D) { /* Maxim */
1257 int emerg, emerg2, status2;
1260 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
1261 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
1262 * exists, both readings will reflect the same value. Otherwise,
1263 * the readings will be different.
1265 emerg = i2c_smbus_read_byte_data(client,
1266 MAX6659_REG_R_REMOTE_EMERG);
1267 man_id = i2c_smbus_read_byte_data(client,
1269 emerg2 = i2c_smbus_read_byte_data(client,
1270 MAX6659_REG_R_REMOTE_EMERG);
1271 status2 = i2c_smbus_read_byte_data(client,
1272 MAX6696_REG_R_STATUS2);
1273 if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0)
1277 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
1278 * register. Reading from that address will return the last
1279 * read value, which in our case is those of the man_id
1280 * register. Likewise, the config1 register seems to lack a
1281 * low nibble, so the value will be those of the previous
1282 * read, so in our case those of the man_id register.
1283 * MAX6659 has a third set of upper temperature limit registers.
1284 * Those registers also return values on MAX6657 and MAX6658,
1285 * thus the only way to detect MAX6659 is by its address.
1286 * For this reason it will be mis-detected as MAX6657 if its
1289 if (chip_id == man_id
1290 && (address == 0x4C || address == 0x4D || address == 0x4E)
1291 && (config1 & 0x1F) == (man_id & 0x0F)
1292 && convrate <= 0x09) {
1293 if (address == 0x4C)
1299 * Even though MAX6695 and MAX6696 do not have a chip ID
1300 * register, reading it returns 0x01. Bit 4 of the config1
1301 * register is unused and should return zero when read. Bit 0 of
1302 * the status2 register is unused and should return zero when
1305 * MAX6695 and MAX6696 have an additional set of temperature
1306 * limit registers. We can detect those chips by checking if
1307 * one of those registers exists.
1310 && (config1 & 0x10) == 0x00
1311 && (status2 & 0x01) == 0x00
1313 && convrate <= 0x07) {
1317 * The chip_id register of the MAX6680 and MAX6681 holds the
1318 * revision of the chip. The lowest bit of the config1 register
1319 * is unused and should return zero when read, so should the
1320 * second to last bit of config1 (software reset).
1323 && (config1 & 0x03) == 0x00
1324 && convrate <= 0x07) {
1328 * The chip_id register of the MAX6646/6647/6649 holds the
1329 * revision of the chip. The lowest 6 bits of the config1
1330 * register are unused and should return zero when read.
1333 && (config1 & 0x3f) == 0x00
1334 && convrate <= 0x07) {
1339 && man_id == 0x5C) { /* Winbond/Nuvoton */
1340 if ((config1 & 0x2A) == 0x00
1341 && (config2 & 0xF8) == 0x00) {
1342 if (chip_id == 0x01 /* W83L771W/G */
1343 && convrate <= 0x09) {
1346 if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
1347 && convrate <= 0x08) {
1352 if (address >= 0x48 && address <= 0x4F
1353 && man_id == 0xA1) { /* NXP Semiconductor/Philips */
1355 && (config1 & 0x2A) == 0x00
1356 && (config2 & 0xFE) == 0x00
1357 && convrate <= 0x09) {
1361 if ((address == 0x4C || address == 0x4D)
1362 && man_id == 0x47) { /* GMT */
1363 if (chip_id == 0x01 /* G781 */
1364 && (config1 & 0x3F) == 0x00
1365 && convrate <= 0x08)
1369 && man_id == 0x55) { /* Texas Instruments */
1372 local_ext = i2c_smbus_read_byte_data(client,
1373 TMP451_REG_R_LOCAL_TEMPL);
1375 if (chip_id == 0x00 /* TMP451 */
1376 && (config1 & 0x1B) == 0x00
1378 && (local_ext & 0x0F) == 0x00)
1382 if (!name) { /* identification failed */
1383 dev_dbg(&adapter->dev,
1384 "Unsupported chip at 0x%02x (man_id=0x%02X, "
1385 "chip_id=0x%02X)\n", address, man_id, chip_id);
1389 strlcpy(info->type, name, I2C_NAME_SIZE);
1394 static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
1396 struct device *dev = &client->dev;
1398 if (data->flags & LM90_HAVE_TEMP3)
1399 sysfs_remove_group(&dev->kobj, &lm90_temp3_group);
1400 if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
1401 sysfs_remove_group(&dev->kobj, &lm90_emergency_alarm_group);
1402 if (data->flags & LM90_HAVE_EMERGENCY)
1403 sysfs_remove_group(&dev->kobj, &lm90_emergency_group);
1404 if (data->flags & LM90_HAVE_OFFSET)
1405 device_remove_file(dev, &sensor_dev_attr_temp2_offset.dev_attr);
1406 device_remove_file(dev, &dev_attr_pec);
1407 sysfs_remove_group(&dev->kobj, &lm90_group);
1410 static void lm90_restore_conf(struct i2c_client *client, struct lm90_data *data)
1412 /* Restore initial configuration */
1413 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
1414 data->convrate_orig);
1415 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1419 static void lm90_init_client(struct i2c_client *client)
1421 u8 config, convrate;
1422 struct lm90_data *data = i2c_get_clientdata(client);
1424 if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
1425 dev_warn(&client->dev, "Failed to read convrate register!\n");
1426 convrate = LM90_DEF_CONVRATE_RVAL;
1428 data->convrate_orig = convrate;
1431 * Start the conversions.
1433 lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
1434 if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
1435 dev_warn(&client->dev, "Initialization failed!\n");
1438 data->config_orig = config;
1440 /* Check Temperature Range Select */
1441 if (data->kind == adt7461 || data->kind == tmp451) {
1443 data->flags |= LM90_FLAG_ADT7461_EXT;
1447 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
1448 * 0.125 degree resolution) and range (0x08, extend range
1449 * to -64 degree) mode for the remote temperature sensor.
1451 if (data->kind == max6680)
1455 * Select external channel 0 for max6695/96
1457 if (data->kind == max6696)
1460 config &= 0xBF; /* run */
1461 if (config != data->config_orig) /* Only write if changed */
1462 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
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 int lm90_probe(struct i2c_client *client,
1514 const struct i2c_device_id *id)
1516 struct device *dev = &client->dev;
1517 struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);
1518 struct lm90_data *data;
1521 data = devm_kzalloc(&client->dev, sizeof(struct lm90_data), GFP_KERNEL);
1525 i2c_set_clientdata(client, data);
1526 mutex_init(&data->update_lock);
1528 /* Set the device type */
1529 data->kind = id->driver_data;
1530 if (data->kind == adm1032) {
1531 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
1532 client->flags &= ~I2C_CLIENT_PEC;
1536 * Different devices have different alarm bits triggering the
1539 data->alert_alarms = lm90_params[data->kind].alert_alarms;
1541 /* Set chip capabilities */
1542 data->flags = lm90_params[data->kind].flags;
1543 data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
1545 /* Set maximum conversion rate */
1546 data->max_convrate = lm90_params[data->kind].max_convrate;
1548 /* Initialize the LM90 chip */
1549 lm90_init_client(client);
1551 /* Register sysfs hooks */
1552 err = sysfs_create_group(&dev->kobj, &lm90_group);
1555 if (client->flags & I2C_CLIENT_PEC) {
1556 err = device_create_file(dev, &dev_attr_pec);
1558 goto exit_remove_files;
1560 if (data->flags & LM90_HAVE_OFFSET) {
1561 err = device_create_file(dev,
1562 &sensor_dev_attr_temp2_offset.dev_attr);
1564 goto exit_remove_files;
1566 if (data->flags & LM90_HAVE_EMERGENCY) {
1567 err = sysfs_create_group(&dev->kobj, &lm90_emergency_group);
1569 goto exit_remove_files;
1571 if (data->flags & LM90_HAVE_EMERGENCY_ALARM) {
1572 err = sysfs_create_group(&dev->kobj,
1573 &lm90_emergency_alarm_group);
1575 goto exit_remove_files;
1577 if (data->flags & LM90_HAVE_TEMP3) {
1578 err = sysfs_create_group(&dev->kobj, &lm90_temp3_group);
1580 goto exit_remove_files;
1583 data->hwmon_dev = hwmon_device_register(dev);
1584 if (IS_ERR(data->hwmon_dev)) {
1585 err = PTR_ERR(data->hwmon_dev);
1586 goto exit_remove_files;
1590 dev_dbg(dev, "IRQ: %d\n", client->irq);
1591 err = devm_request_threaded_irq(dev, client->irq,
1592 NULL, lm90_irq_thread,
1593 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
1596 dev_err(dev, "cannot request IRQ %d\n", client->irq);
1597 goto exit_remove_files;
1604 lm90_remove_files(client, data);
1606 lm90_restore_conf(client, data);
1610 static int lm90_remove(struct i2c_client *client)
1612 struct lm90_data *data = i2c_get_clientdata(client);
1614 hwmon_device_unregister(data->hwmon_dev);
1615 lm90_remove_files(client, data);
1616 lm90_restore_conf(client, data);
1621 static void lm90_alert(struct i2c_client *client, unsigned int flag)
1625 if (lm90_is_tripped(client, &alarms)) {
1627 * Disable ALERT# output, because these chips don't implement
1628 * SMBus alert correctly; they should only hold the alert line
1631 struct lm90_data *data = i2c_get_clientdata(client);
1633 if ((data->flags & LM90_HAVE_BROKEN_ALERT)
1634 && (alarms & data->alert_alarms)) {
1636 dev_dbg(&client->dev, "Disabling ALERT#\n");
1637 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
1638 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1642 dev_info(&client->dev, "Everything OK\n");
1646 static struct i2c_driver lm90_driver = {
1647 .class = I2C_CLASS_HWMON,
1651 .probe = lm90_probe,
1652 .remove = lm90_remove,
1653 .alert = lm90_alert,
1654 .id_table = lm90_id,
1655 .detect = lm90_detect,
1656 .address_list = normal_i2c,
1659 module_i2c_driver(lm90_driver);
1661 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1662 MODULE_DESCRIPTION("LM90/ADM1032 driver");
1663 MODULE_LICENSE("GPL");