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 * Since the LM90 was the first chipset supported by this driver, most
64 * comments will refer to this chipset, but are actually general and
65 * concern all supported chipsets, unless mentioned otherwise.
67 * This program is free software; you can redistribute it and/or modify
68 * it under the terms of the GNU General Public License as published by
69 * the Free Software Foundation; either version 2 of the License, or
70 * (at your option) any later version.
72 * This program is distributed in the hope that it will be useful,
73 * but WITHOUT ANY WARRANTY; without even the implied warranty of
74 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
75 * GNU General Public License for more details.
77 * You should have received a copy of the GNU General Public License
78 * along with this program; if not, write to the Free Software
79 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
82 #include <linux/module.h>
83 #include <linux/init.h>
84 #include <linux/slab.h>
85 #include <linux/jiffies.h>
86 #include <linux/i2c.h>
87 #include <linux/hwmon-sysfs.h>
88 #include <linux/hwmon.h>
89 #include <linux/err.h>
90 #include <linux/mutex.h>
91 #include <linux/sysfs.h>
92 #include <linux/interrupt.h>
96 * Address is fully defined internally and cannot be changed except for
97 * MAX6659, MAX6680 and MAX6681.
98 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
99 * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
100 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
102 * MAX6647 has address 0x4e.
103 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
104 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
105 * 0x4c, 0x4d or 0x4e.
106 * SA56004 can have address 0x48 through 0x4F.
109 static const unsigned short normal_i2c[] = {
110 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
111 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
113 enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
114 max6646, w83l771, max6696, sa56004, g781 };
120 #define LM90_REG_R_MAN_ID 0xFE
121 #define LM90_REG_R_CHIP_ID 0xFF
122 #define LM90_REG_R_CONFIG1 0x03
123 #define LM90_REG_W_CONFIG1 0x09
124 #define LM90_REG_R_CONFIG2 0xBF
125 #define LM90_REG_W_CONFIG2 0xBF
126 #define LM90_REG_R_CONVRATE 0x04
127 #define LM90_REG_W_CONVRATE 0x0A
128 #define LM90_REG_R_STATUS 0x02
129 #define LM90_REG_R_LOCAL_TEMP 0x00
130 #define LM90_REG_R_LOCAL_HIGH 0x05
131 #define LM90_REG_W_LOCAL_HIGH 0x0B
132 #define LM90_REG_R_LOCAL_LOW 0x06
133 #define LM90_REG_W_LOCAL_LOW 0x0C
134 #define LM90_REG_R_LOCAL_CRIT 0x20
135 #define LM90_REG_W_LOCAL_CRIT 0x20
136 #define LM90_REG_R_REMOTE_TEMPH 0x01
137 #define LM90_REG_R_REMOTE_TEMPL 0x10
138 #define LM90_REG_R_REMOTE_OFFSH 0x11
139 #define LM90_REG_W_REMOTE_OFFSH 0x11
140 #define LM90_REG_R_REMOTE_OFFSL 0x12
141 #define LM90_REG_W_REMOTE_OFFSL 0x12
142 #define LM90_REG_R_REMOTE_HIGHH 0x07
143 #define LM90_REG_W_REMOTE_HIGHH 0x0D
144 #define LM90_REG_R_REMOTE_HIGHL 0x13
145 #define LM90_REG_W_REMOTE_HIGHL 0x13
146 #define LM90_REG_R_REMOTE_LOWH 0x08
147 #define LM90_REG_W_REMOTE_LOWH 0x0E
148 #define LM90_REG_R_REMOTE_LOWL 0x14
149 #define LM90_REG_W_REMOTE_LOWL 0x14
150 #define LM90_REG_R_REMOTE_CRIT 0x19
151 #define LM90_REG_W_REMOTE_CRIT 0x19
152 #define LM90_REG_R_TCRIT_HYST 0x21
153 #define LM90_REG_W_TCRIT_HYST 0x21
155 /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
157 #define MAX6657_REG_R_LOCAL_TEMPL 0x11
158 #define MAX6696_REG_R_STATUS2 0x12
159 #define MAX6659_REG_R_REMOTE_EMERG 0x16
160 #define MAX6659_REG_W_REMOTE_EMERG 0x16
161 #define MAX6659_REG_R_LOCAL_EMERG 0x17
162 #define MAX6659_REG_W_LOCAL_EMERG 0x17
164 /* SA56004 registers */
166 #define SA56004_REG_R_LOCAL_TEMPL 0x22
168 #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
169 #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
174 #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
175 /* Device features */
176 #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
177 #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
178 #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
179 #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
180 #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
181 #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
184 #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */
185 #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */
186 #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */
187 #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */
188 #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */
189 #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */
190 #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */
192 #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */
193 #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */
194 #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */
195 #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */
196 #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */
197 #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */
198 #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */
201 * Driver data (common to all clients)
204 static const struct i2c_device_id lm90_id[] = {
205 { "adm1032", adm1032 },
206 { "adt7461", adt7461 },
207 { "adt7461a", adt7461 },
213 { "max6646", max6646 },
214 { "max6647", max6646 },
215 { "max6649", max6646 },
216 { "max6657", max6657 },
217 { "max6658", max6657 },
218 { "max6659", max6659 },
219 { "max6680", max6680 },
220 { "max6681", max6680 },
221 { "max6695", max6696 },
222 { "max6696", max6696 },
223 { "nct1008", adt7461 },
224 { "w83l771", w83l771 },
225 { "sa56004", sa56004 },
228 MODULE_DEVICE_TABLE(i2c, lm90_id);
231 * chip type specific parameters
234 u32 flags; /* Capabilities */
235 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
236 /* Upper 8 bits for max6695/96 */
237 u8 max_convrate; /* Maximum conversion rate register value */
238 u8 reg_local_ext; /* Extended local temp register (optional) */
241 static const struct lm90_params lm90_params[] = {
243 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
244 | LM90_HAVE_BROKEN_ALERT,
245 .alert_alarms = 0x7c,
249 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
250 | LM90_HAVE_BROKEN_ALERT,
251 .alert_alarms = 0x7c,
255 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
256 | LM90_HAVE_BROKEN_ALERT,
257 .alert_alarms = 0x7c,
261 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
262 .alert_alarms = 0x7b,
266 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
267 .alert_alarms = 0x7b,
271 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
272 .alert_alarms = 0x7b,
276 .alert_alarms = 0x7c,
278 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
281 .alert_alarms = 0x7c,
283 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
286 .flags = LM90_HAVE_EMERGENCY,
287 .alert_alarms = 0x7c,
289 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
292 .flags = LM90_HAVE_OFFSET,
293 .alert_alarms = 0x7c,
297 .flags = LM90_HAVE_EMERGENCY
298 | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
299 .alert_alarms = 0x1c7c,
301 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
304 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
305 .alert_alarms = 0x7c,
309 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
310 .alert_alarms = 0x7b,
312 .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
317 * TEMP8 register index
319 enum lm90_temp8_reg_index {
324 LOCAL_EMERG, /* max6659 and max6695/96 */
325 REMOTE_EMERG, /* max6659 and max6695/96 */
326 REMOTE2_CRIT, /* max6695/96 only */
327 REMOTE2_EMERG, /* max6695/96 only */
332 * TEMP11 register index
334 enum lm90_temp11_reg_index {
338 REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */
340 REMOTE2_TEMP, /* max6695/96 only */
341 REMOTE2_LOW, /* max6695/96 only */
342 REMOTE2_HIGH, /* max6695/96 only */
347 * Client data (each client gets its own)
351 struct device *hwmon_dev;
352 struct mutex update_lock;
353 char valid; /* zero until following fields are valid */
354 unsigned long last_updated; /* in jiffies */
358 int update_interval; /* in milliseconds */
360 u8 config_orig; /* Original configuration register value */
361 u8 convrate_orig; /* Original conversion rate register value */
362 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
363 /* Upper 8 bits for max6695/96 */
364 u8 max_convrate; /* Maximum conversion rate */
365 u8 reg_local_ext; /* local extension register offset */
367 /* registers values */
368 s8 temp8[TEMP8_REG_NUM];
369 s16 temp11[TEMP11_REG_NUM];
371 u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
379 * The ADM1032 supports PEC but not on write byte transactions, so we need
380 * to explicitly ask for a transaction without PEC.
382 static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
384 return i2c_smbus_xfer(client->adapter, client->addr,
385 client->flags & ~I2C_CLIENT_PEC,
386 I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
390 * It is assumed that client->update_lock is held (unless we are in
391 * detection or initialization steps). This matters when PEC is enabled,
392 * because we don't want the address pointer to change between the write
393 * byte and the read byte transactions.
395 static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value)
399 if (client->flags & I2C_CLIENT_PEC) {
400 err = adm1032_write_byte(client, reg);
402 err = i2c_smbus_read_byte(client);
404 err = i2c_smbus_read_byte_data(client, reg);
407 dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
416 static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
422 * There is a trick here. We have to read two registers to have the
423 * sensor temperature, but we have to beware a conversion could occur
424 * between the readings. The datasheet says we should either use
425 * the one-shot conversion register, which we don't want to do
426 * (disables hardware monitoring) or monitor the busy bit, which is
427 * impossible (we can't read the values and monitor that bit at the
428 * exact same time). So the solution used here is to read the high
429 * byte once, then the low byte, then the high byte again. If the new
430 * high byte matches the old one, then we have a valid reading. Else
431 * we have to read the low byte again, and now we believe we have a
434 if ((err = lm90_read_reg(client, regh, &oldh))
435 || (err = lm90_read_reg(client, regl, &l))
436 || (err = lm90_read_reg(client, regh, &newh)))
439 err = lm90_read_reg(client, regl, &l);
443 *value = (newh << 8) | l;
449 * client->update_lock must be held when calling this function (unless we are
450 * in detection or initialization steps), and while a remote channel other
451 * than channel 0 is selected. Also, calling code must make sure to re-select
452 * external channel 0 before releasing the lock. This is necessary because
453 * various registers have different meanings as a result of selecting a
454 * non-default remote channel.
456 static inline void lm90_select_remote_channel(struct i2c_client *client,
457 struct lm90_data *data,
462 if (data->kind == max6696) {
463 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
467 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
473 * Set conversion rate.
474 * client->update_lock must be held when calling this function (unless we are
475 * in detection or initialization steps).
477 static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
478 unsigned int interval)
481 unsigned int update_interval;
483 /* Shift calculations to avoid rounding errors */
486 /* find the nearest update rate */
487 for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
488 i < data->max_convrate; i++, update_interval >>= 1)
489 if (interval >= update_interval * 3 / 4)
492 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
493 data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
496 static struct lm90_data *lm90_update_device(struct device *dev)
498 struct i2c_client *client = to_i2c_client(dev);
499 struct lm90_data *data = i2c_get_clientdata(client);
500 unsigned long next_update;
502 mutex_lock(&data->update_lock);
504 next_update = data->last_updated +
505 msecs_to_jiffies(data->update_interval);
506 if (time_after(jiffies, next_update) || !data->valid) {
510 dev_dbg(&client->dev, "Updating lm90 data.\n");
511 lm90_read_reg(client, LM90_REG_R_LOCAL_LOW,
512 &data->temp8[LOCAL_LOW]);
513 lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH,
514 &data->temp8[LOCAL_HIGH]);
515 lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT,
516 &data->temp8[LOCAL_CRIT]);
517 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
518 &data->temp8[REMOTE_CRIT]);
519 lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
521 if (data->reg_local_ext) {
522 lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
524 &data->temp11[LOCAL_TEMP]);
526 if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
528 data->temp11[LOCAL_TEMP] = h << 8;
530 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
531 LM90_REG_R_REMOTE_TEMPL,
532 &data->temp11[REMOTE_TEMP]);
534 if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
535 data->temp11[REMOTE_LOW] = h << 8;
536 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
537 && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
539 data->temp11[REMOTE_LOW] |= l;
541 if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
542 data->temp11[REMOTE_HIGH] = h << 8;
543 if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
544 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
546 data->temp11[REMOTE_HIGH] |= l;
549 if (data->flags & LM90_HAVE_OFFSET) {
550 if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
552 && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
554 data->temp11[REMOTE_OFFSET] = (h << 8) | l;
556 if (data->flags & LM90_HAVE_EMERGENCY) {
557 lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
558 &data->temp8[LOCAL_EMERG]);
559 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
560 &data->temp8[REMOTE_EMERG]);
562 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
563 data->alarms = alarms; /* save as 16 bit value */
565 if (data->kind == max6696) {
566 lm90_select_remote_channel(client, data, 1);
567 lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
568 &data->temp8[REMOTE2_CRIT]);
569 lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
570 &data->temp8[REMOTE2_EMERG]);
571 lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
572 LM90_REG_R_REMOTE_TEMPL,
573 &data->temp11[REMOTE2_TEMP]);
574 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
575 data->temp11[REMOTE2_LOW] = h << 8;
576 if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
577 data->temp11[REMOTE2_HIGH] = h << 8;
578 lm90_select_remote_channel(client, data, 0);
580 if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
582 data->alarms |= alarms << 8;
586 * Re-enable ALERT# output if it was originally enabled and
587 * relevant alarms are all clear
589 if ((data->config_orig & 0x80) == 0
590 && (data->alarms & data->alert_alarms) == 0) {
593 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
595 dev_dbg(&client->dev, "Re-enabling ALERT#\n");
596 i2c_smbus_write_byte_data(client,
602 data->last_updated = jiffies;
606 mutex_unlock(&data->update_lock);
613 * For local temperatures and limits, critical limits and the hysteresis
614 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
615 * For remote temperatures and limits, it uses signed 11-bit values with
616 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
617 * Maxim chips use unsigned values.
620 static inline int temp_from_s8(s8 val)
625 static inline int temp_from_u8(u8 val)
630 static inline int temp_from_s16(s16 val)
632 return val / 32 * 125;
635 static inline int temp_from_u16(u16 val)
637 return val / 32 * 125;
640 static s8 temp_to_s8(long val)
647 return (val - 500) / 1000;
648 return (val + 500) / 1000;
651 static u8 temp_to_u8(long val)
657 return (val + 500) / 1000;
660 static s16 temp_to_s16(long val)
667 return (val - 62) / 125 * 32;
668 return (val + 62) / 125 * 32;
671 static u8 hyst_to_reg(long val)
677 return (val + 500) / 1000;
681 * ADT7461 in compatibility mode is almost identical to LM90 except that
682 * attempts to write values that are outside the range 0 < temp < 127 are
683 * treated as the boundary value.
685 * ADT7461 in "extended mode" operation uses unsigned integers offset by
686 * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
688 static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
690 if (data->flags & LM90_FLAG_ADT7461_EXT)
691 return (val - 64) * 1000;
693 return temp_from_s8(val);
696 static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
698 if (data->flags & LM90_FLAG_ADT7461_EXT)
699 return (val - 0x4000) / 64 * 250;
701 return temp_from_s16(val);
704 static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
706 if (data->flags & LM90_FLAG_ADT7461_EXT) {
711 return (val + 500 + 64000) / 1000;
717 return (val + 500) / 1000;
721 static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
723 if (data->flags & LM90_FLAG_ADT7461_EXT) {
728 return (val + 64000 + 125) / 250 * 64;
734 return (val + 125) / 250 * 64;
742 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
745 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
746 struct lm90_data *data = lm90_update_device(dev);
749 if (data->kind == adt7461)
750 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
751 else if (data->kind == max6646)
752 temp = temp_from_u8(data->temp8[attr->index]);
754 temp = temp_from_s8(data->temp8[attr->index]);
756 /* +16 degrees offset for temp2 for the LM99 */
757 if (data->kind == lm99 && attr->index == 3)
760 return sprintf(buf, "%d\n", temp);
763 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
764 const char *buf, size_t count)
766 static const u8 reg[TEMP8_REG_NUM] = {
767 LM90_REG_W_LOCAL_LOW,
768 LM90_REG_W_LOCAL_HIGH,
769 LM90_REG_W_LOCAL_CRIT,
770 LM90_REG_W_REMOTE_CRIT,
771 MAX6659_REG_W_LOCAL_EMERG,
772 MAX6659_REG_W_REMOTE_EMERG,
773 LM90_REG_W_REMOTE_CRIT,
774 MAX6659_REG_W_REMOTE_EMERG,
777 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
778 struct i2c_client *client = to_i2c_client(dev);
779 struct lm90_data *data = i2c_get_clientdata(client);
780 int nr = attr->index;
784 err = kstrtol(buf, 10, &val);
788 /* +16 degrees offset for temp2 for the LM99 */
789 if (data->kind == lm99 && attr->index == 3)
792 mutex_lock(&data->update_lock);
793 if (data->kind == adt7461)
794 data->temp8[nr] = temp_to_u8_adt7461(data, val);
795 else if (data->kind == max6646)
796 data->temp8[nr] = temp_to_u8(val);
798 data->temp8[nr] = temp_to_s8(val);
800 lm90_select_remote_channel(client, data, nr >= 6);
801 i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
802 lm90_select_remote_channel(client, data, 0);
804 mutex_unlock(&data->update_lock);
808 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
811 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
812 struct lm90_data *data = lm90_update_device(dev);
815 if (data->kind == adt7461)
816 temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
817 else if (data->kind == max6646)
818 temp = temp_from_u16(data->temp11[attr->index]);
820 temp = temp_from_s16(data->temp11[attr->index]);
822 /* +16 degrees offset for temp2 for the LM99 */
823 if (data->kind == lm99 && attr->index <= 2)
826 return sprintf(buf, "%d\n", temp);
829 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
830 const char *buf, size_t count)
837 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 },
838 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 },
839 { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 },
840 { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 },
841 { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
844 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
845 struct i2c_client *client = to_i2c_client(dev);
846 struct lm90_data *data = i2c_get_clientdata(client);
848 int index = attr->index;
852 err = kstrtol(buf, 10, &val);
856 /* +16 degrees offset for temp2 for the LM99 */
857 if (data->kind == lm99 && index <= 2)
860 mutex_lock(&data->update_lock);
861 if (data->kind == adt7461)
862 data->temp11[index] = temp_to_u16_adt7461(data, val);
863 else if (data->kind == max6646)
864 data->temp11[index] = temp_to_u8(val) << 8;
865 else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
866 data->temp11[index] = temp_to_s16(val);
868 data->temp11[index] = temp_to_s8(val) << 8;
870 lm90_select_remote_channel(client, data, reg[nr].channel);
871 i2c_smbus_write_byte_data(client, reg[nr].high,
872 data->temp11[index] >> 8);
873 if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
874 i2c_smbus_write_byte_data(client, reg[nr].low,
875 data->temp11[index] & 0xff);
876 lm90_select_remote_channel(client, data, 0);
878 mutex_unlock(&data->update_lock);
882 static ssize_t show_temphyst(struct device *dev,
883 struct device_attribute *devattr,
886 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
887 struct lm90_data *data = lm90_update_device(dev);
890 if (data->kind == adt7461)
891 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
892 else if (data->kind == max6646)
893 temp = temp_from_u8(data->temp8[attr->index]);
895 temp = temp_from_s8(data->temp8[attr->index]);
897 /* +16 degrees offset for temp2 for the LM99 */
898 if (data->kind == lm99 && attr->index == 3)
901 return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
904 static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
905 const char *buf, size_t count)
907 struct i2c_client *client = to_i2c_client(dev);
908 struct lm90_data *data = i2c_get_clientdata(client);
913 err = kstrtol(buf, 10, &val);
917 mutex_lock(&data->update_lock);
918 if (data->kind == adt7461)
919 temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]);
920 else if (data->kind == max6646)
921 temp = temp_from_u8(data->temp8[LOCAL_CRIT]);
923 temp = temp_from_s8(data->temp8[LOCAL_CRIT]);
925 data->temp_hyst = hyst_to_reg(temp - val);
926 i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
928 mutex_unlock(&data->update_lock);
932 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
935 struct lm90_data *data = lm90_update_device(dev);
936 return sprintf(buf, "%d\n", data->alarms);
939 static ssize_t show_alarm(struct device *dev, struct device_attribute
942 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
943 struct lm90_data *data = lm90_update_device(dev);
944 int bitnr = attr->index;
946 return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
949 static ssize_t show_update_interval(struct device *dev,
950 struct device_attribute *attr, char *buf)
952 struct lm90_data *data = dev_get_drvdata(dev);
954 return sprintf(buf, "%u\n", data->update_interval);
957 static ssize_t set_update_interval(struct device *dev,
958 struct device_attribute *attr,
959 const char *buf, size_t count)
961 struct i2c_client *client = to_i2c_client(dev);
962 struct lm90_data *data = i2c_get_clientdata(client);
966 err = kstrtoul(buf, 10, &val);
970 mutex_lock(&data->update_lock);
971 lm90_set_convrate(client, data, clamp_val(val, 0, 100000));
972 mutex_unlock(&data->update_lock);
977 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL,
979 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL,
981 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
982 set_temp8, LOCAL_LOW);
983 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
984 set_temp11, 0, REMOTE_LOW);
985 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
986 set_temp8, LOCAL_HIGH);
987 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
988 set_temp11, 1, REMOTE_HIGH);
989 static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
990 set_temp8, LOCAL_CRIT);
991 static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
992 set_temp8, REMOTE_CRIT);
993 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
994 set_temphyst, LOCAL_CRIT);
995 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL,
997 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
998 set_temp11, 2, REMOTE_OFFSET);
1000 /* Individual alarm files */
1001 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
1002 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
1003 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
1004 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
1005 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
1006 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
1007 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
1008 /* Raw alarm file for compatibility */
1009 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1011 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
1012 set_update_interval);
1014 static struct attribute *lm90_attributes[] = {
1015 &sensor_dev_attr_temp1_input.dev_attr.attr,
1016 &sensor_dev_attr_temp2_input.dev_attr.attr,
1017 &sensor_dev_attr_temp1_min.dev_attr.attr,
1018 &sensor_dev_attr_temp2_min.dev_attr.attr,
1019 &sensor_dev_attr_temp1_max.dev_attr.attr,
1020 &sensor_dev_attr_temp2_max.dev_attr.attr,
1021 &sensor_dev_attr_temp1_crit.dev_attr.attr,
1022 &sensor_dev_attr_temp2_crit.dev_attr.attr,
1023 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1024 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1026 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
1027 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
1028 &sensor_dev_attr_temp2_fault.dev_attr.attr,
1029 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
1030 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
1031 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
1032 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
1033 &dev_attr_alarms.attr,
1034 &dev_attr_update_interval.attr,
1038 static const struct attribute_group lm90_group = {
1039 .attrs = lm90_attributes,
1043 * Additional attributes for devices with emergency sensors
1045 static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
1046 set_temp8, LOCAL_EMERG);
1047 static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
1048 set_temp8, REMOTE_EMERG);
1049 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
1051 static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
1052 NULL, REMOTE_EMERG);
1054 static struct attribute *lm90_emergency_attributes[] = {
1055 &sensor_dev_attr_temp1_emergency.dev_attr.attr,
1056 &sensor_dev_attr_temp2_emergency.dev_attr.attr,
1057 &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
1058 &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr,
1062 static const struct attribute_group lm90_emergency_group = {
1063 .attrs = lm90_emergency_attributes,
1066 static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
1067 static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);
1069 static struct attribute *lm90_emergency_alarm_attributes[] = {
1070 &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
1071 &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
1075 static const struct attribute_group lm90_emergency_alarm_group = {
1076 .attrs = lm90_emergency_alarm_attributes,
1080 * Additional attributes for devices with 3 temperature sensors
1082 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL,
1084 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
1085 set_temp11, 3, REMOTE2_LOW);
1086 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
1087 set_temp11, 4, REMOTE2_HIGH);
1088 static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
1089 set_temp8, REMOTE2_CRIT);
1090 static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL,
1092 static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
1093 set_temp8, REMOTE2_EMERG);
1094 static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
1095 NULL, REMOTE2_EMERG);
1097 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
1098 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
1099 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
1100 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
1101 static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);
1103 static struct attribute *lm90_temp3_attributes[] = {
1104 &sensor_dev_attr_temp3_input.dev_attr.attr,
1105 &sensor_dev_attr_temp3_min.dev_attr.attr,
1106 &sensor_dev_attr_temp3_max.dev_attr.attr,
1107 &sensor_dev_attr_temp3_crit.dev_attr.attr,
1108 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1109 &sensor_dev_attr_temp3_emergency.dev_attr.attr,
1110 &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr,
1112 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1113 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
1114 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
1115 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
1116 &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr,
1120 static const struct attribute_group lm90_temp3_group = {
1121 .attrs = lm90_temp3_attributes,
1124 /* pec used for ADM1032 only */
1125 static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
1128 struct i2c_client *client = to_i2c_client(dev);
1129 return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
1132 static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
1133 const char *buf, size_t count)
1135 struct i2c_client *client = to_i2c_client(dev);
1139 err = kstrtol(buf, 10, &val);
1145 client->flags &= ~I2C_CLIENT_PEC;
1148 client->flags |= I2C_CLIENT_PEC;
1157 static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
1163 /* Return 0 if detection is successful, -ENODEV otherwise */
1164 static int lm90_detect(struct i2c_client *client,
1165 struct i2c_board_info *info)
1167 struct i2c_adapter *adapter = client->adapter;
1168 int address = client->addr;
1169 const char *name = NULL;
1170 int man_id, chip_id, config1, config2, convrate;
1172 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1175 /* detection and identification */
1176 man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID);
1177 chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID);
1178 config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1);
1179 convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE);
1180 if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0)
1183 if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
1184 config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2);
1188 config2 = 0; /* Make compiler happy */
1190 if ((address == 0x4C || address == 0x4D)
1191 && man_id == 0x01) { /* National Semiconductor */
1192 if ((config1 & 0x2A) == 0x00
1193 && (config2 & 0xF8) == 0x00
1194 && convrate <= 0x09) {
1196 && (chip_id & 0xF0) == 0x20) { /* LM90 */
1199 if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
1201 dev_info(&adapter->dev,
1202 "Assuming LM99 chip at 0x%02x\n",
1204 dev_info(&adapter->dev,
1205 "If it is an LM89, instantiate it "
1206 "with the new_device sysfs "
1210 && (chip_id & 0xF0) == 0x10) { /* LM86 */
1215 if ((address == 0x4C || address == 0x4D)
1216 && man_id == 0x41) { /* Analog Devices */
1217 if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
1218 && (config1 & 0x3F) == 0x00
1219 && convrate <= 0x0A) {
1222 * The ADM1032 supports PEC, but only if combined
1223 * transactions are not used.
1225 if (i2c_check_functionality(adapter,
1226 I2C_FUNC_SMBUS_BYTE))
1227 info->flags |= I2C_CLIENT_PEC;
1229 if (chip_id == 0x51 /* ADT7461 */
1230 && (config1 & 0x1B) == 0x00
1231 && convrate <= 0x0A) {
1234 if (chip_id == 0x57 /* ADT7461A, NCT1008 */
1235 && (config1 & 0x1B) == 0x00
1236 && convrate <= 0x0A) {
1240 if (man_id == 0x4D) { /* Maxim */
1241 int emerg, emerg2, status2;
1244 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
1245 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
1246 * exists, both readings will reflect the same value. Otherwise,
1247 * the readings will be different.
1249 emerg = i2c_smbus_read_byte_data(client,
1250 MAX6659_REG_R_REMOTE_EMERG);
1251 man_id = i2c_smbus_read_byte_data(client,
1253 emerg2 = i2c_smbus_read_byte_data(client,
1254 MAX6659_REG_R_REMOTE_EMERG);
1255 status2 = i2c_smbus_read_byte_data(client,
1256 MAX6696_REG_R_STATUS2);
1257 if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0)
1261 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
1262 * register. Reading from that address will return the last
1263 * read value, which in our case is those of the man_id
1264 * register. Likewise, the config1 register seems to lack a
1265 * low nibble, so the value will be those of the previous
1266 * read, so in our case those of the man_id register.
1267 * MAX6659 has a third set of upper temperature limit registers.
1268 * Those registers also return values on MAX6657 and MAX6658,
1269 * thus the only way to detect MAX6659 is by its address.
1270 * For this reason it will be mis-detected as MAX6657 if its
1273 if (chip_id == man_id
1274 && (address == 0x4C || address == 0x4D || address == 0x4E)
1275 && (config1 & 0x1F) == (man_id & 0x0F)
1276 && convrate <= 0x09) {
1277 if (address == 0x4C)
1283 * Even though MAX6695 and MAX6696 do not have a chip ID
1284 * register, reading it returns 0x01. Bit 4 of the config1
1285 * register is unused and should return zero when read. Bit 0 of
1286 * the status2 register is unused and should return zero when
1289 * MAX6695 and MAX6696 have an additional set of temperature
1290 * limit registers. We can detect those chips by checking if
1291 * one of those registers exists.
1294 && (config1 & 0x10) == 0x00
1295 && (status2 & 0x01) == 0x00
1297 && convrate <= 0x07) {
1301 * The chip_id register of the MAX6680 and MAX6681 holds the
1302 * revision of the chip. The lowest bit of the config1 register
1303 * is unused and should return zero when read, so should the
1304 * second to last bit of config1 (software reset).
1307 && (config1 & 0x03) == 0x00
1308 && convrate <= 0x07) {
1312 * The chip_id register of the MAX6646/6647/6649 holds the
1313 * revision of the chip. The lowest 6 bits of the config1
1314 * register are unused and should return zero when read.
1317 && (config1 & 0x3f) == 0x00
1318 && convrate <= 0x07) {
1323 && man_id == 0x5C) { /* Winbond/Nuvoton */
1324 if ((config1 & 0x2A) == 0x00
1325 && (config2 & 0xF8) == 0x00) {
1326 if (chip_id == 0x01 /* W83L771W/G */
1327 && convrate <= 0x09) {
1330 if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
1331 && convrate <= 0x08) {
1336 if (address >= 0x48 && address <= 0x4F
1337 && man_id == 0xA1) { /* NXP Semiconductor/Philips */
1339 && (config1 & 0x2A) == 0x00
1340 && (config2 & 0xFE) == 0x00
1341 && convrate <= 0x09) {
1345 if ((address == 0x4C || address == 0x4D)
1346 && man_id == 0x47) { /* GMT */
1347 if (chip_id == 0x01 /* G781 */
1348 && (config1 & 0x3F) == 0x00
1349 && convrate <= 0x08)
1353 if (!name) { /* identification failed */
1354 dev_dbg(&adapter->dev,
1355 "Unsupported chip at 0x%02x (man_id=0x%02X, "
1356 "chip_id=0x%02X)\n", address, man_id, chip_id);
1360 strlcpy(info->type, name, I2C_NAME_SIZE);
1365 static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
1367 struct device *dev = &client->dev;
1369 if (data->flags & LM90_HAVE_TEMP3)
1370 sysfs_remove_group(&dev->kobj, &lm90_temp3_group);
1371 if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
1372 sysfs_remove_group(&dev->kobj, &lm90_emergency_alarm_group);
1373 if (data->flags & LM90_HAVE_EMERGENCY)
1374 sysfs_remove_group(&dev->kobj, &lm90_emergency_group);
1375 if (data->flags & LM90_HAVE_OFFSET)
1376 device_remove_file(dev, &sensor_dev_attr_temp2_offset.dev_attr);
1377 device_remove_file(dev, &dev_attr_pec);
1378 sysfs_remove_group(&dev->kobj, &lm90_group);
1381 static void lm90_restore_conf(struct i2c_client *client, struct lm90_data *data)
1383 /* Restore initial configuration */
1384 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
1385 data->convrate_orig);
1386 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1390 static void lm90_init_client(struct i2c_client *client)
1392 u8 config, convrate;
1393 struct lm90_data *data = i2c_get_clientdata(client);
1395 if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
1396 dev_warn(&client->dev, "Failed to read convrate register!\n");
1397 convrate = LM90_DEF_CONVRATE_RVAL;
1399 data->convrate_orig = convrate;
1402 * Start the conversions.
1404 lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
1405 if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
1406 dev_warn(&client->dev, "Initialization failed!\n");
1409 data->config_orig = config;
1411 /* Check Temperature Range Select */
1412 if (data->kind == adt7461) {
1414 data->flags |= LM90_FLAG_ADT7461_EXT;
1418 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
1419 * 0.125 degree resolution) and range (0x08, extend range
1420 * to -64 degree) mode for the remote temperature sensor.
1422 if (data->kind == max6680)
1426 * Select external channel 0 for max6695/96
1428 if (data->kind == max6696)
1431 config &= 0xBF; /* run */
1432 if (config != data->config_orig) /* Only write if changed */
1433 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
1436 static bool lm90_is_tripped(struct i2c_client *client, u16 *status)
1438 struct lm90_data *data = i2c_get_clientdata(client);
1441 lm90_read_reg(client, LM90_REG_R_STATUS, &st);
1443 if (data->kind == max6696)
1444 lm90_read_reg(client, MAX6696_REG_R_STATUS2, &st2);
1446 *status = st | (st2 << 8);
1448 if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0)
1451 if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) ||
1452 (st2 & MAX6696_STATUS2_LOT2))
1453 dev_warn(&client->dev,
1454 "temp%d out of range, please check!\n", 1);
1455 if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) ||
1456 (st2 & MAX6696_STATUS2_ROT2))
1457 dev_warn(&client->dev,
1458 "temp%d out of range, please check!\n", 2);
1459 if (st & LM90_STATUS_ROPEN)
1460 dev_warn(&client->dev,
1461 "temp%d diode open, please check!\n", 2);
1462 if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH |
1463 MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2))
1464 dev_warn(&client->dev,
1465 "temp%d out of range, please check!\n", 3);
1466 if (st2 & MAX6696_STATUS2_R2OPEN)
1467 dev_warn(&client->dev,
1468 "temp%d diode open, please check!\n", 3);
1473 static irqreturn_t lm90_irq_thread(int irq, void *dev_id)
1475 struct i2c_client *client = dev_id;
1478 if (lm90_is_tripped(client, &status))
1484 static int lm90_probe(struct i2c_client *client,
1485 const struct i2c_device_id *id)
1487 struct device *dev = &client->dev;
1488 struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);
1489 struct lm90_data *data;
1492 data = devm_kzalloc(&client->dev, sizeof(struct lm90_data), GFP_KERNEL);
1496 i2c_set_clientdata(client, data);
1497 mutex_init(&data->update_lock);
1499 /* Set the device type */
1500 data->kind = id->driver_data;
1501 if (data->kind == adm1032) {
1502 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
1503 client->flags &= ~I2C_CLIENT_PEC;
1507 * Different devices have different alarm bits triggering the
1510 data->alert_alarms = lm90_params[data->kind].alert_alarms;
1512 /* Set chip capabilities */
1513 data->flags = lm90_params[data->kind].flags;
1514 data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
1516 /* Set maximum conversion rate */
1517 data->max_convrate = lm90_params[data->kind].max_convrate;
1519 /* Initialize the LM90 chip */
1520 lm90_init_client(client);
1522 /* Register sysfs hooks */
1523 err = sysfs_create_group(&dev->kobj, &lm90_group);
1526 if (client->flags & I2C_CLIENT_PEC) {
1527 err = device_create_file(dev, &dev_attr_pec);
1529 goto exit_remove_files;
1531 if (data->flags & LM90_HAVE_OFFSET) {
1532 err = device_create_file(dev,
1533 &sensor_dev_attr_temp2_offset.dev_attr);
1535 goto exit_remove_files;
1537 if (data->flags & LM90_HAVE_EMERGENCY) {
1538 err = sysfs_create_group(&dev->kobj, &lm90_emergency_group);
1540 goto exit_remove_files;
1542 if (data->flags & LM90_HAVE_EMERGENCY_ALARM) {
1543 err = sysfs_create_group(&dev->kobj,
1544 &lm90_emergency_alarm_group);
1546 goto exit_remove_files;
1548 if (data->flags & LM90_HAVE_TEMP3) {
1549 err = sysfs_create_group(&dev->kobj, &lm90_temp3_group);
1551 goto exit_remove_files;
1554 data->hwmon_dev = hwmon_device_register(dev);
1555 if (IS_ERR(data->hwmon_dev)) {
1556 err = PTR_ERR(data->hwmon_dev);
1557 goto exit_remove_files;
1561 dev_dbg(dev, "IRQ: %d\n", client->irq);
1562 err = devm_request_threaded_irq(dev, client->irq,
1563 NULL, lm90_irq_thread,
1564 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
1567 dev_err(dev, "cannot request IRQ %d\n", client->irq);
1568 goto exit_remove_files;
1575 lm90_remove_files(client, data);
1577 lm90_restore_conf(client, data);
1581 static int lm90_remove(struct i2c_client *client)
1583 struct lm90_data *data = i2c_get_clientdata(client);
1585 hwmon_device_unregister(data->hwmon_dev);
1586 lm90_remove_files(client, data);
1587 lm90_restore_conf(client, data);
1592 static void lm90_alert(struct i2c_client *client, unsigned int flag)
1596 if (lm90_is_tripped(client, &alarms)) {
1598 * Disable ALERT# output, because these chips don't implement
1599 * SMBus alert correctly; they should only hold the alert line
1602 struct lm90_data *data = i2c_get_clientdata(client);
1604 if ((data->flags & LM90_HAVE_BROKEN_ALERT)
1605 && (alarms & data->alert_alarms)) {
1607 dev_dbg(&client->dev, "Disabling ALERT#\n");
1608 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
1609 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1613 dev_info(&client->dev, "Everything OK\n");
1617 static struct i2c_driver lm90_driver = {
1618 .class = I2C_CLASS_HWMON,
1622 .probe = lm90_probe,
1623 .remove = lm90_remove,
1624 .alert = lm90_alert,
1625 .id_table = lm90_id,
1626 .detect = lm90_detect,
1627 .address_list = normal_i2c,
1630 module_i2c_driver(lm90_driver);
1632 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1633 MODULE_DESCRIPTION("LM90/ADM1032 driver");
1634 MODULE_LICENSE("GPL");