2 * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
4 * Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
6 * Based on the lm83 driver. The LM90 is a sensor chip made by National
7 * Semiconductor. It reports up to two temperatures (its own plus up to
8 * one external one) with a 0.125 deg resolution (1 deg for local
9 * temperature) and a 3-4 deg accuracy.
11 * This driver also supports the LM89 and LM99, two other sensor chips
12 * made by National Semiconductor. Both have an increased remote
13 * temperature measurement accuracy (1 degree), and the LM99
14 * additionally shifts remote temperatures (measured and limits) by 16
15 * degrees, which allows for higher temperatures measurement.
16 * Note that there is no way to differentiate between both chips.
17 * When device is auto-detected, the driver will assume an LM99.
19 * This driver also supports the LM86, another sensor chip made by
20 * National Semiconductor. It is exactly similar to the LM90 except it
21 * has a higher accuracy.
23 * This driver also supports the ADM1032, a sensor chip made by Analog
24 * Devices. That chip is similar to the LM90, with a few differences
25 * that are not handled by this driver. Among others, it has a higher
26 * accuracy than the LM90, much like the LM86 does.
28 * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor
29 * chips made by Maxim. These chips are similar to the LM86.
30 * Note that there is no easy way to differentiate between the three
31 * variants. We use the device address to detect MAX6659, which will result
32 * in a detection as max6657 if it is on address 0x4c. The extra address
33 * and features of the MAX6659 are only supported if the chip is configured
34 * explicitly as max6659, or if its address is not 0x4c.
35 * These chips lack the remote temperature offset feature.
37 * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and
38 * MAX6692 chips made by Maxim. These are again similar to the LM86,
39 * but they use unsigned temperature values and can report temperatures
40 * from 0 to 145 degrees.
42 * This driver also supports the MAX6680 and MAX6681, two other sensor
43 * chips made by Maxim. These are quite similar to the other Maxim
44 * chips. The MAX6680 and MAX6681 only differ in the pinout so they can
45 * be treated identically.
47 * This driver also supports the MAX6695 and MAX6696, two other sensor
48 * chips made by Maxim. These are also quite similar to other Maxim
49 * chips, but support three temperature sensors instead of two. MAX6695
50 * and MAX6696 only differ in the pinout so they can be treated identically.
52 * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as
53 * NCT1008 from ON Semiconductor. The chips are supported in both compatibility
54 * and extended mode. They are mostly compatible with LM90 except for a data
55 * format difference for the temperature value registers.
57 * This driver also supports the SA56004 from Philips. This device is
58 * pin-compatible with the LM86, the ED/EDP parts are also address-compatible.
60 * Since the LM90 was the first chipset supported by this driver, most
61 * comments will refer to this chipset, but are actually general and
62 * concern all supported chipsets, unless mentioned otherwise.
64 * This program is free software; you can redistribute it and/or modify
65 * it under the terms of the GNU General Public License as published by
66 * the Free Software Foundation; either version 2 of the License, or
67 * (at your option) any later version.
69 * This program is distributed in the hope that it will be useful,
70 * but WITHOUT ANY WARRANTY; without even the implied warranty of
71 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
72 * GNU General Public License for more details.
74 * You should have received a copy of the GNU General Public License
75 * along with this program; if not, write to the Free Software
76 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
79 #include <linux/module.h>
80 #include <linux/init.h>
81 #include <linux/slab.h>
82 #include <linux/jiffies.h>
83 #include <linux/i2c.h>
84 #include <linux/hwmon-sysfs.h>
85 #include <linux/hwmon.h>
86 #include <linux/err.h>
87 #include <linux/mutex.h>
88 #include <linux/sysfs.h>
92 * Address is fully defined internally and cannot be changed except for
93 * MAX6659, MAX6680 and MAX6681.
94 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
95 * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
96 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
98 * MAX6647 has address 0x4e.
99 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
100 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
101 * 0x4c, 0x4d or 0x4e.
102 * SA56004 can have address 0x48 through 0x4F.
105 static const unsigned short normal_i2c
[] = {
106 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
107 0x4d, 0x4e, 0x4f, I2C_CLIENT_END
};
109 enum chips
{ lm90
, adm1032
, lm99
, lm86
, max6657
, max6659
, adt7461
, max6680
,
110 max6646
, w83l771
, max6696
, sa56004
};
116 #define LM90_REG_R_MAN_ID 0xFE
117 #define LM90_REG_R_CHIP_ID 0xFF
118 #define LM90_REG_R_CONFIG1 0x03
119 #define LM90_REG_W_CONFIG1 0x09
120 #define LM90_REG_R_CONFIG2 0xBF
121 #define LM90_REG_W_CONFIG2 0xBF
122 #define LM90_REG_R_CONVRATE 0x04
123 #define LM90_REG_W_CONVRATE 0x0A
124 #define LM90_REG_R_STATUS 0x02
125 #define LM90_REG_R_LOCAL_TEMP 0x00
126 #define LM90_REG_R_LOCAL_HIGH 0x05
127 #define LM90_REG_W_LOCAL_HIGH 0x0B
128 #define LM90_REG_R_LOCAL_LOW 0x06
129 #define LM90_REG_W_LOCAL_LOW 0x0C
130 #define LM90_REG_R_LOCAL_CRIT 0x20
131 #define LM90_REG_W_LOCAL_CRIT 0x20
132 #define LM90_REG_R_REMOTE_TEMPH 0x01
133 #define LM90_REG_R_REMOTE_TEMPL 0x10
134 #define LM90_REG_R_REMOTE_OFFSH 0x11
135 #define LM90_REG_W_REMOTE_OFFSH 0x11
136 #define LM90_REG_R_REMOTE_OFFSL 0x12
137 #define LM90_REG_W_REMOTE_OFFSL 0x12
138 #define LM90_REG_R_REMOTE_HIGHH 0x07
139 #define LM90_REG_W_REMOTE_HIGHH 0x0D
140 #define LM90_REG_R_REMOTE_HIGHL 0x13
141 #define LM90_REG_W_REMOTE_HIGHL 0x13
142 #define LM90_REG_R_REMOTE_LOWH 0x08
143 #define LM90_REG_W_REMOTE_LOWH 0x0E
144 #define LM90_REG_R_REMOTE_LOWL 0x14
145 #define LM90_REG_W_REMOTE_LOWL 0x14
146 #define LM90_REG_R_REMOTE_CRIT 0x19
147 #define LM90_REG_W_REMOTE_CRIT 0x19
148 #define LM90_REG_R_TCRIT_HYST 0x21
149 #define LM90_REG_W_TCRIT_HYST 0x21
151 /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
153 #define MAX6657_REG_R_LOCAL_TEMPL 0x11
154 #define MAX6696_REG_R_STATUS2 0x12
155 #define MAX6659_REG_R_REMOTE_EMERG 0x16
156 #define MAX6659_REG_W_REMOTE_EMERG 0x16
157 #define MAX6659_REG_R_LOCAL_EMERG 0x17
158 #define MAX6659_REG_W_LOCAL_EMERG 0x17
160 /* SA56004 registers */
162 #define SA56004_REG_R_LOCAL_TEMPL 0x22
164 #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
165 #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
170 #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
171 /* Device features */
172 #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
173 #define LM90_HAVE_LOCAL_EXT (1 << 2) /* extended local temperature */
174 #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
175 #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
176 #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
177 #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
178 #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
181 * Driver data (common to all clients)
184 static const struct i2c_device_id lm90_id
[] = {
185 { "adm1032", adm1032
},
186 { "adt7461", adt7461
},
187 { "adt7461a", adt7461
},
192 { "max6646", max6646
},
193 { "max6647", max6646
},
194 { "max6649", max6646
},
195 { "max6657", max6657
},
196 { "max6658", max6657
},
197 { "max6659", max6659
},
198 { "max6680", max6680
},
199 { "max6681", max6680
},
200 { "max6695", max6696
},
201 { "max6696", max6696
},
202 { "nct1008", adt7461
},
203 { "w83l771", w83l771
},
204 { "sa56004", sa56004
},
207 MODULE_DEVICE_TABLE(i2c
, lm90_id
);
210 * chip type specific parameters
213 u32 flags
; /* Capabilities */
214 u16 alert_alarms
; /* Which alarm bits trigger ALERT# */
215 /* Upper 8 bits for max6695/96 */
216 u8 max_convrate
; /* Maximum conversion rate register value */
217 u8 reg_local_ext
; /* Local extension register if
218 LM90_HAVE_LOCAL_EXT is set*/
221 static const struct lm90_params lm90_params
[] = {
223 .flags
= LM90_HAVE_OFFSET
| LM90_HAVE_REM_LIMIT_EXT
224 | LM90_HAVE_BROKEN_ALERT
,
225 .alert_alarms
= 0x7c,
229 .flags
= LM90_HAVE_OFFSET
| LM90_HAVE_REM_LIMIT_EXT
230 | LM90_HAVE_BROKEN_ALERT
,
231 .alert_alarms
= 0x7c,
235 .flags
= LM90_HAVE_OFFSET
| LM90_HAVE_REM_LIMIT_EXT
,
236 .alert_alarms
= 0x7b,
240 .flags
= LM90_HAVE_OFFSET
| LM90_HAVE_REM_LIMIT_EXT
,
241 .alert_alarms
= 0x7b,
245 .flags
= LM90_HAVE_OFFSET
| LM90_HAVE_REM_LIMIT_EXT
,
246 .alert_alarms
= 0x7b,
250 .flags
= LM90_HAVE_LOCAL_EXT
,
251 .alert_alarms
= 0x7c,
253 .reg_local_ext
= MAX6657_REG_R_LOCAL_TEMPL
,
256 .flags
= LM90_HAVE_LOCAL_EXT
,
257 .alert_alarms
= 0x7c,
259 .reg_local_ext
= MAX6657_REG_R_LOCAL_TEMPL
,
262 .flags
= LM90_HAVE_LOCAL_EXT
| LM90_HAVE_EMERGENCY
,
263 .alert_alarms
= 0x7c,
265 .reg_local_ext
= MAX6657_REG_R_LOCAL_TEMPL
,
268 .flags
= LM90_HAVE_OFFSET
,
269 .alert_alarms
= 0x7c,
273 .flags
= LM90_HAVE_LOCAL_EXT
| LM90_HAVE_EMERGENCY
274 | LM90_HAVE_EMERGENCY_ALARM
| LM90_HAVE_TEMP3
,
275 .alert_alarms
= 0x187c,
277 .reg_local_ext
= MAX6657_REG_R_LOCAL_TEMPL
,
280 .flags
= LM90_HAVE_OFFSET
| LM90_HAVE_REM_LIMIT_EXT
,
281 .alert_alarms
= 0x7c,
285 .flags
= LM90_HAVE_OFFSET
| LM90_HAVE_REM_LIMIT_EXT
286 | LM90_HAVE_LOCAL_EXT
,
287 .alert_alarms
= 0x7b,
289 .reg_local_ext
= SA56004_REG_R_LOCAL_TEMPL
,
294 * Client data (each client gets its own)
298 struct device
*hwmon_dev
;
299 struct mutex update_lock
;
300 char valid
; /* zero until following fields are valid */
301 unsigned long last_updated
; /* in jiffies */
305 int update_interval
; /* in milliseconds */
307 u8 config_orig
; /* Original configuration register value */
308 u8 convrate_orig
; /* Original conversion rate register value */
309 u16 alert_alarms
; /* Which alarm bits trigger ALERT# */
310 /* Upper 8 bits for max6695/96 */
311 u8 max_convrate
; /* Maximum conversion rate */
312 u8 reg_local_ext
; /* local extension register offset */
314 /* registers values */
315 s8 temp8
[8]; /* 0: local low limit
317 2: local critical limit
318 3: remote critical limit
319 4: local emergency limit (max6659 and max6695/96)
320 5: remote emergency limit (max6659 and max6695/96)
321 6: remote 2 critical limit (max6695/96 only)
322 7: remote 2 emergency limit (max6695/96 only) */
323 s16 temp11
[8]; /* 0: remote input
326 3: remote offset (except max6646, max6657/58/59,
329 5: remote 2 input (max6695/96 only)
330 6: remote 2 low limit (max6695/96 only)
331 7: remote 2 high limit (ma6695/96 only) */
333 u16 alarms
; /* bitvector (upper 8 bits for max6695/96) */
341 * The ADM1032 supports PEC but not on write byte transactions, so we need
342 * to explicitly ask for a transaction without PEC.
344 static inline s32
adm1032_write_byte(struct i2c_client
*client
, u8 value
)
346 return i2c_smbus_xfer(client
->adapter
, client
->addr
,
347 client
->flags
& ~I2C_CLIENT_PEC
,
348 I2C_SMBUS_WRITE
, value
, I2C_SMBUS_BYTE
, NULL
);
352 * It is assumed that client->update_lock is held (unless we are in
353 * detection or initialization steps). This matters when PEC is enabled,
354 * because we don't want the address pointer to change between the write
355 * byte and the read byte transactions.
357 static int lm90_read_reg(struct i2c_client
*client
, u8 reg
, u8
*value
)
361 if (client
->flags
& I2C_CLIENT_PEC
) {
362 err
= adm1032_write_byte(client
, reg
);
364 err
= i2c_smbus_read_byte(client
);
366 err
= i2c_smbus_read_byte_data(client
, reg
);
369 dev_warn(&client
->dev
, "Register %#02x read failed (%d)\n",
378 static int lm90_read16(struct i2c_client
*client
, u8 regh
, u8 regl
, u16
*value
)
384 * There is a trick here. We have to read two registers to have the
385 * sensor temperature, but we have to beware a conversion could occur
386 * between the readings. The datasheet says we should either use
387 * the one-shot conversion register, which we don't want to do
388 * (disables hardware monitoring) or monitor the busy bit, which is
389 * impossible (we can't read the values and monitor that bit at the
390 * exact same time). So the solution used here is to read the high
391 * byte once, then the low byte, then the high byte again. If the new
392 * high byte matches the old one, then we have a valid reading. Else
393 * we have to read the low byte again, and now we believe we have a
396 if ((err
= lm90_read_reg(client
, regh
, &oldh
))
397 || (err
= lm90_read_reg(client
, regl
, &l
))
398 || (err
= lm90_read_reg(client
, regh
, &newh
)))
401 err
= lm90_read_reg(client
, regl
, &l
);
405 *value
= (newh
<< 8) | l
;
411 * client->update_lock must be held when calling this function (unless we are
412 * in detection or initialization steps), and while a remote channel other
413 * than channel 0 is selected. Also, calling code must make sure to re-select
414 * external channel 0 before releasing the lock. This is necessary because
415 * various registers have different meanings as a result of selecting a
416 * non-default remote channel.
418 static inline void lm90_select_remote_channel(struct i2c_client
*client
,
419 struct lm90_data
*data
,
424 if (data
->kind
== max6696
) {
425 lm90_read_reg(client
, LM90_REG_R_CONFIG1
, &config
);
429 i2c_smbus_write_byte_data(client
, LM90_REG_W_CONFIG1
,
435 * Set conversion rate.
436 * client->update_lock must be held when calling this function (unless we are
437 * in detection or initialization steps).
439 static void lm90_set_convrate(struct i2c_client
*client
, struct lm90_data
*data
,
440 unsigned int interval
)
443 unsigned int update_interval
;
445 /* Shift calculations to avoid rounding errors */
448 /* find the nearest update rate */
449 for (i
= 0, update_interval
= LM90_MAX_CONVRATE_MS
<< 6;
450 i
< data
->max_convrate
; i
++, update_interval
>>= 1)
451 if (interval
>= update_interval
* 3 / 4)
454 i2c_smbus_write_byte_data(client
, LM90_REG_W_CONVRATE
, i
);
455 data
->update_interval
= DIV_ROUND_CLOSEST(update_interval
, 64);
458 static struct lm90_data
*lm90_update_device(struct device
*dev
)
460 struct i2c_client
*client
= to_i2c_client(dev
);
461 struct lm90_data
*data
= i2c_get_clientdata(client
);
462 unsigned long next_update
;
464 mutex_lock(&data
->update_lock
);
466 next_update
= data
->last_updated
467 + msecs_to_jiffies(data
->update_interval
) + 1;
468 if (time_after(jiffies
, next_update
) || !data
->valid
) {
472 dev_dbg(&client
->dev
, "Updating lm90 data.\n");
473 lm90_read_reg(client
, LM90_REG_R_LOCAL_LOW
, &data
->temp8
[0]);
474 lm90_read_reg(client
, LM90_REG_R_LOCAL_HIGH
, &data
->temp8
[1]);
475 lm90_read_reg(client
, LM90_REG_R_LOCAL_CRIT
, &data
->temp8
[2]);
476 lm90_read_reg(client
, LM90_REG_R_REMOTE_CRIT
, &data
->temp8
[3]);
477 lm90_read_reg(client
, LM90_REG_R_TCRIT_HYST
, &data
->temp_hyst
);
479 if (data
->flags
& LM90_HAVE_LOCAL_EXT
) {
480 lm90_read16(client
, LM90_REG_R_LOCAL_TEMP
,
484 if (lm90_read_reg(client
, LM90_REG_R_LOCAL_TEMP
,
486 data
->temp11
[4] = h
<< 8;
488 lm90_read16(client
, LM90_REG_R_REMOTE_TEMPH
,
489 LM90_REG_R_REMOTE_TEMPL
, &data
->temp11
[0]);
491 if (lm90_read_reg(client
, LM90_REG_R_REMOTE_LOWH
, &h
) == 0) {
492 data
->temp11
[1] = h
<< 8;
493 if ((data
->flags
& LM90_HAVE_REM_LIMIT_EXT
)
494 && lm90_read_reg(client
, LM90_REG_R_REMOTE_LOWL
,
496 data
->temp11
[1] |= l
;
498 if (lm90_read_reg(client
, LM90_REG_R_REMOTE_HIGHH
, &h
) == 0) {
499 data
->temp11
[2] = h
<< 8;
500 if ((data
->flags
& LM90_HAVE_REM_LIMIT_EXT
)
501 && lm90_read_reg(client
, LM90_REG_R_REMOTE_HIGHL
,
503 data
->temp11
[2] |= l
;
506 if (data
->flags
& LM90_HAVE_OFFSET
) {
507 if (lm90_read_reg(client
, LM90_REG_R_REMOTE_OFFSH
,
509 && lm90_read_reg(client
, LM90_REG_R_REMOTE_OFFSL
,
511 data
->temp11
[3] = (h
<< 8) | l
;
513 if (data
->flags
& LM90_HAVE_EMERGENCY
) {
514 lm90_read_reg(client
, MAX6659_REG_R_LOCAL_EMERG
,
516 lm90_read_reg(client
, MAX6659_REG_R_REMOTE_EMERG
,
519 lm90_read_reg(client
, LM90_REG_R_STATUS
, &alarms
);
520 data
->alarms
= alarms
; /* save as 16 bit value */
522 if (data
->kind
== max6696
) {
523 lm90_select_remote_channel(client
, data
, 1);
524 lm90_read_reg(client
, LM90_REG_R_REMOTE_CRIT
,
526 lm90_read_reg(client
, MAX6659_REG_R_REMOTE_EMERG
,
528 lm90_read16(client
, LM90_REG_R_REMOTE_TEMPH
,
529 LM90_REG_R_REMOTE_TEMPL
, &data
->temp11
[5]);
530 if (!lm90_read_reg(client
, LM90_REG_R_REMOTE_LOWH
, &h
))
531 data
->temp11
[6] = h
<< 8;
532 if (!lm90_read_reg(client
, LM90_REG_R_REMOTE_HIGHH
, &h
))
533 data
->temp11
[7] = h
<< 8;
534 lm90_select_remote_channel(client
, data
, 0);
536 if (!lm90_read_reg(client
, MAX6696_REG_R_STATUS2
,
538 data
->alarms
|= alarms
<< 8;
541 /* Re-enable ALERT# output if it was originally enabled and
542 * relevant alarms are all clear */
543 if ((data
->config_orig
& 0x80) == 0
544 && (data
->alarms
& data
->alert_alarms
) == 0) {
547 lm90_read_reg(client
, LM90_REG_R_CONFIG1
, &config
);
549 dev_dbg(&client
->dev
, "Re-enabling ALERT#\n");
550 i2c_smbus_write_byte_data(client
,
556 data
->last_updated
= jiffies
;
560 mutex_unlock(&data
->update_lock
);
567 * For local temperatures and limits, critical limits and the hysteresis
568 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
569 * For remote temperatures and limits, it uses signed 11-bit values with
570 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
571 * Maxim chips use unsigned values.
574 static inline int temp_from_s8(s8 val
)
579 static inline int temp_from_u8(u8 val
)
584 static inline int temp_from_s16(s16 val
)
586 return val
/ 32 * 125;
589 static inline int temp_from_u16(u16 val
)
591 return val
/ 32 * 125;
594 static s8
temp_to_s8(long val
)
601 return (val
- 500) / 1000;
602 return (val
+ 500) / 1000;
605 static u8
temp_to_u8(long val
)
611 return (val
+ 500) / 1000;
614 static s16
temp_to_s16(long val
)
621 return (val
- 62) / 125 * 32;
622 return (val
+ 62) / 125 * 32;
625 static u8
hyst_to_reg(long val
)
631 return (val
+ 500) / 1000;
635 * ADT7461 in compatibility mode is almost identical to LM90 except that
636 * attempts to write values that are outside the range 0 < temp < 127 are
637 * treated as the boundary value.
639 * ADT7461 in "extended mode" operation uses unsigned integers offset by
640 * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
642 static inline int temp_from_u8_adt7461(struct lm90_data
*data
, u8 val
)
644 if (data
->flags
& LM90_FLAG_ADT7461_EXT
)
645 return (val
- 64) * 1000;
647 return temp_from_s8(val
);
650 static inline int temp_from_u16_adt7461(struct lm90_data
*data
, u16 val
)
652 if (data
->flags
& LM90_FLAG_ADT7461_EXT
)
653 return (val
- 0x4000) / 64 * 250;
655 return temp_from_s16(val
);
658 static u8
temp_to_u8_adt7461(struct lm90_data
*data
, long val
)
660 if (data
->flags
& LM90_FLAG_ADT7461_EXT
) {
665 return (val
+ 500 + 64000) / 1000;
671 return (val
+ 500) / 1000;
675 static u16
temp_to_u16_adt7461(struct lm90_data
*data
, long val
)
677 if (data
->flags
& LM90_FLAG_ADT7461_EXT
) {
682 return (val
+ 64000 + 125) / 250 * 64;
688 return (val
+ 125) / 250 * 64;
696 static ssize_t
show_temp8(struct device
*dev
, struct device_attribute
*devattr
,
699 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
700 struct lm90_data
*data
= lm90_update_device(dev
);
703 if (data
->kind
== adt7461
)
704 temp
= temp_from_u8_adt7461(data
, data
->temp8
[attr
->index
]);
705 else if (data
->kind
== max6646
)
706 temp
= temp_from_u8(data
->temp8
[attr
->index
]);
708 temp
= temp_from_s8(data
->temp8
[attr
->index
]);
710 /* +16 degrees offset for temp2 for the LM99 */
711 if (data
->kind
== lm99
&& attr
->index
== 3)
714 return sprintf(buf
, "%d\n", temp
);
717 static ssize_t
set_temp8(struct device
*dev
, struct device_attribute
*devattr
,
718 const char *buf
, size_t count
)
720 static const u8 reg
[8] = {
721 LM90_REG_W_LOCAL_LOW
,
722 LM90_REG_W_LOCAL_HIGH
,
723 LM90_REG_W_LOCAL_CRIT
,
724 LM90_REG_W_REMOTE_CRIT
,
725 MAX6659_REG_W_LOCAL_EMERG
,
726 MAX6659_REG_W_REMOTE_EMERG
,
727 LM90_REG_W_REMOTE_CRIT
,
728 MAX6659_REG_W_REMOTE_EMERG
,
731 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
732 struct i2c_client
*client
= to_i2c_client(dev
);
733 struct lm90_data
*data
= i2c_get_clientdata(client
);
734 int nr
= attr
->index
;
738 err
= strict_strtol(buf
, 10, &val
);
742 /* +16 degrees offset for temp2 for the LM99 */
743 if (data
->kind
== lm99
&& attr
->index
== 3)
746 mutex_lock(&data
->update_lock
);
747 if (data
->kind
== adt7461
)
748 data
->temp8
[nr
] = temp_to_u8_adt7461(data
, val
);
749 else if (data
->kind
== max6646
)
750 data
->temp8
[nr
] = temp_to_u8(val
);
752 data
->temp8
[nr
] = temp_to_s8(val
);
754 lm90_select_remote_channel(client
, data
, nr
>= 6);
755 i2c_smbus_write_byte_data(client
, reg
[nr
], data
->temp8
[nr
]);
756 lm90_select_remote_channel(client
, data
, 0);
758 mutex_unlock(&data
->update_lock
);
762 static ssize_t
show_temp11(struct device
*dev
, struct device_attribute
*devattr
,
765 struct sensor_device_attribute_2
*attr
= to_sensor_dev_attr_2(devattr
);
766 struct lm90_data
*data
= lm90_update_device(dev
);
769 if (data
->kind
== adt7461
)
770 temp
= temp_from_u16_adt7461(data
, data
->temp11
[attr
->index
]);
771 else if (data
->kind
== max6646
)
772 temp
= temp_from_u16(data
->temp11
[attr
->index
]);
774 temp
= temp_from_s16(data
->temp11
[attr
->index
]);
776 /* +16 degrees offset for temp2 for the LM99 */
777 if (data
->kind
== lm99
&& attr
->index
<= 2)
780 return sprintf(buf
, "%d\n", temp
);
783 static ssize_t
set_temp11(struct device
*dev
, struct device_attribute
*devattr
,
784 const char *buf
, size_t count
)
791 { LM90_REG_W_REMOTE_LOWH
, LM90_REG_W_REMOTE_LOWL
, 0 },
792 { LM90_REG_W_REMOTE_HIGHH
, LM90_REG_W_REMOTE_HIGHL
, 0 },
793 { LM90_REG_W_REMOTE_OFFSH
, LM90_REG_W_REMOTE_OFFSL
, 0 },
794 { LM90_REG_W_REMOTE_LOWH
, LM90_REG_W_REMOTE_LOWL
, 1 },
795 { LM90_REG_W_REMOTE_HIGHH
, LM90_REG_W_REMOTE_HIGHL
, 1 }
798 struct sensor_device_attribute_2
*attr
= to_sensor_dev_attr_2(devattr
);
799 struct i2c_client
*client
= to_i2c_client(dev
);
800 struct lm90_data
*data
= i2c_get_clientdata(client
);
802 int index
= attr
->index
;
806 err
= strict_strtol(buf
, 10, &val
);
810 /* +16 degrees offset for temp2 for the LM99 */
811 if (data
->kind
== lm99
&& index
<= 2)
814 mutex_lock(&data
->update_lock
);
815 if (data
->kind
== adt7461
)
816 data
->temp11
[index
] = temp_to_u16_adt7461(data
, val
);
817 else if (data
->kind
== max6646
)
818 data
->temp11
[index
] = temp_to_u8(val
) << 8;
819 else if (data
->flags
& LM90_HAVE_REM_LIMIT_EXT
)
820 data
->temp11
[index
] = temp_to_s16(val
);
822 data
->temp11
[index
] = temp_to_s8(val
) << 8;
824 lm90_select_remote_channel(client
, data
, reg
[nr
].channel
);
825 i2c_smbus_write_byte_data(client
, reg
[nr
].high
,
826 data
->temp11
[index
] >> 8);
827 if (data
->flags
& LM90_HAVE_REM_LIMIT_EXT
)
828 i2c_smbus_write_byte_data(client
, reg
[nr
].low
,
829 data
->temp11
[index
] & 0xff);
830 lm90_select_remote_channel(client
, data
, 0);
832 mutex_unlock(&data
->update_lock
);
836 static ssize_t
show_temphyst(struct device
*dev
,
837 struct device_attribute
*devattr
,
840 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
841 struct lm90_data
*data
= lm90_update_device(dev
);
844 if (data
->kind
== adt7461
)
845 temp
= temp_from_u8_adt7461(data
, data
->temp8
[attr
->index
]);
846 else if (data
->kind
== max6646
)
847 temp
= temp_from_u8(data
->temp8
[attr
->index
]);
849 temp
= temp_from_s8(data
->temp8
[attr
->index
]);
851 /* +16 degrees offset for temp2 for the LM99 */
852 if (data
->kind
== lm99
&& attr
->index
== 3)
855 return sprintf(buf
, "%d\n", temp
- temp_from_s8(data
->temp_hyst
));
858 static ssize_t
set_temphyst(struct device
*dev
, struct device_attribute
*dummy
,
859 const char *buf
, size_t count
)
861 struct i2c_client
*client
= to_i2c_client(dev
);
862 struct lm90_data
*data
= i2c_get_clientdata(client
);
867 err
= strict_strtol(buf
, 10, &val
);
871 mutex_lock(&data
->update_lock
);
872 if (data
->kind
== adt7461
)
873 temp
= temp_from_u8_adt7461(data
, data
->temp8
[2]);
874 else if (data
->kind
== max6646
)
875 temp
= temp_from_u8(data
->temp8
[2]);
877 temp
= temp_from_s8(data
->temp8
[2]);
879 data
->temp_hyst
= hyst_to_reg(temp
- val
);
880 i2c_smbus_write_byte_data(client
, LM90_REG_W_TCRIT_HYST
,
882 mutex_unlock(&data
->update_lock
);
886 static ssize_t
show_alarms(struct device
*dev
, struct device_attribute
*dummy
,
889 struct lm90_data
*data
= lm90_update_device(dev
);
890 return sprintf(buf
, "%d\n", data
->alarms
);
893 static ssize_t
show_alarm(struct device
*dev
, struct device_attribute
896 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
897 struct lm90_data
*data
= lm90_update_device(dev
);
898 int bitnr
= attr
->index
;
900 return sprintf(buf
, "%d\n", (data
->alarms
>> bitnr
) & 1);
903 static ssize_t
show_update_interval(struct device
*dev
,
904 struct device_attribute
*attr
, char *buf
)
906 struct lm90_data
*data
= dev_get_drvdata(dev
);
908 return sprintf(buf
, "%u\n", data
->update_interval
);
911 static ssize_t
set_update_interval(struct device
*dev
,
912 struct device_attribute
*attr
,
913 const char *buf
, size_t count
)
915 struct i2c_client
*client
= to_i2c_client(dev
);
916 struct lm90_data
*data
= i2c_get_clientdata(client
);
920 err
= strict_strtoul(buf
, 10, &val
);
924 mutex_lock(&data
->update_lock
);
925 lm90_set_convrate(client
, data
, val
);
926 mutex_unlock(&data
->update_lock
);
931 static SENSOR_DEVICE_ATTR_2(temp1_input
, S_IRUGO
, show_temp11
, NULL
, 0, 4);
932 static SENSOR_DEVICE_ATTR_2(temp2_input
, S_IRUGO
, show_temp11
, NULL
, 0, 0);
933 static SENSOR_DEVICE_ATTR(temp1_min
, S_IWUSR
| S_IRUGO
, show_temp8
,
935 static SENSOR_DEVICE_ATTR_2(temp2_min
, S_IWUSR
| S_IRUGO
, show_temp11
,
937 static SENSOR_DEVICE_ATTR(temp1_max
, S_IWUSR
| S_IRUGO
, show_temp8
,
939 static SENSOR_DEVICE_ATTR_2(temp2_max
, S_IWUSR
| S_IRUGO
, show_temp11
,
941 static SENSOR_DEVICE_ATTR(temp1_crit
, S_IWUSR
| S_IRUGO
, show_temp8
,
943 static SENSOR_DEVICE_ATTR(temp2_crit
, S_IWUSR
| S_IRUGO
, show_temp8
,
945 static SENSOR_DEVICE_ATTR(temp1_crit_hyst
, S_IWUSR
| S_IRUGO
, show_temphyst
,
947 static SENSOR_DEVICE_ATTR(temp2_crit_hyst
, S_IRUGO
, show_temphyst
, NULL
, 3);
948 static SENSOR_DEVICE_ATTR_2(temp2_offset
, S_IWUSR
| S_IRUGO
, show_temp11
,
951 /* Individual alarm files */
952 static SENSOR_DEVICE_ATTR(temp1_crit_alarm
, S_IRUGO
, show_alarm
, NULL
, 0);
953 static SENSOR_DEVICE_ATTR(temp2_crit_alarm
, S_IRUGO
, show_alarm
, NULL
, 1);
954 static SENSOR_DEVICE_ATTR(temp2_fault
, S_IRUGO
, show_alarm
, NULL
, 2);
955 static SENSOR_DEVICE_ATTR(temp2_min_alarm
, S_IRUGO
, show_alarm
, NULL
, 3);
956 static SENSOR_DEVICE_ATTR(temp2_max_alarm
, S_IRUGO
, show_alarm
, NULL
, 4);
957 static SENSOR_DEVICE_ATTR(temp1_min_alarm
, S_IRUGO
, show_alarm
, NULL
, 5);
958 static SENSOR_DEVICE_ATTR(temp1_max_alarm
, S_IRUGO
, show_alarm
, NULL
, 6);
959 /* Raw alarm file for compatibility */
960 static DEVICE_ATTR(alarms
, S_IRUGO
, show_alarms
, NULL
);
962 static DEVICE_ATTR(update_interval
, S_IRUGO
| S_IWUSR
, show_update_interval
,
963 set_update_interval
);
965 static struct attribute
*lm90_attributes
[] = {
966 &sensor_dev_attr_temp1_input
.dev_attr
.attr
,
967 &sensor_dev_attr_temp2_input
.dev_attr
.attr
,
968 &sensor_dev_attr_temp1_min
.dev_attr
.attr
,
969 &sensor_dev_attr_temp2_min
.dev_attr
.attr
,
970 &sensor_dev_attr_temp1_max
.dev_attr
.attr
,
971 &sensor_dev_attr_temp2_max
.dev_attr
.attr
,
972 &sensor_dev_attr_temp1_crit
.dev_attr
.attr
,
973 &sensor_dev_attr_temp2_crit
.dev_attr
.attr
,
974 &sensor_dev_attr_temp1_crit_hyst
.dev_attr
.attr
,
975 &sensor_dev_attr_temp2_crit_hyst
.dev_attr
.attr
,
977 &sensor_dev_attr_temp1_crit_alarm
.dev_attr
.attr
,
978 &sensor_dev_attr_temp2_crit_alarm
.dev_attr
.attr
,
979 &sensor_dev_attr_temp2_fault
.dev_attr
.attr
,
980 &sensor_dev_attr_temp2_min_alarm
.dev_attr
.attr
,
981 &sensor_dev_attr_temp2_max_alarm
.dev_attr
.attr
,
982 &sensor_dev_attr_temp1_min_alarm
.dev_attr
.attr
,
983 &sensor_dev_attr_temp1_max_alarm
.dev_attr
.attr
,
984 &dev_attr_alarms
.attr
,
985 &dev_attr_update_interval
.attr
,
989 static const struct attribute_group lm90_group
= {
990 .attrs
= lm90_attributes
,
994 * Additional attributes for devices with emergency sensors
996 static SENSOR_DEVICE_ATTR(temp1_emergency
, S_IWUSR
| S_IRUGO
, show_temp8
,
998 static SENSOR_DEVICE_ATTR(temp2_emergency
, S_IWUSR
| S_IRUGO
, show_temp8
,
1000 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst
, S_IRUGO
, show_temphyst
,
1002 static SENSOR_DEVICE_ATTR(temp2_emergency_hyst
, S_IRUGO
, show_temphyst
,
1005 static struct attribute
*lm90_emergency_attributes
[] = {
1006 &sensor_dev_attr_temp1_emergency
.dev_attr
.attr
,
1007 &sensor_dev_attr_temp2_emergency
.dev_attr
.attr
,
1008 &sensor_dev_attr_temp1_emergency_hyst
.dev_attr
.attr
,
1009 &sensor_dev_attr_temp2_emergency_hyst
.dev_attr
.attr
,
1013 static const struct attribute_group lm90_emergency_group
= {
1014 .attrs
= lm90_emergency_attributes
,
1017 static SENSOR_DEVICE_ATTR(temp1_emergency_alarm
, S_IRUGO
, show_alarm
, NULL
, 15);
1018 static SENSOR_DEVICE_ATTR(temp2_emergency_alarm
, S_IRUGO
, show_alarm
, NULL
, 13);
1020 static struct attribute
*lm90_emergency_alarm_attributes
[] = {
1021 &sensor_dev_attr_temp1_emergency_alarm
.dev_attr
.attr
,
1022 &sensor_dev_attr_temp2_emergency_alarm
.dev_attr
.attr
,
1026 static const struct attribute_group lm90_emergency_alarm_group
= {
1027 .attrs
= lm90_emergency_alarm_attributes
,
1031 * Additional attributes for devices with 3 temperature sensors
1033 static SENSOR_DEVICE_ATTR_2(temp3_input
, S_IRUGO
, show_temp11
, NULL
, 0, 5);
1034 static SENSOR_DEVICE_ATTR_2(temp3_min
, S_IWUSR
| S_IRUGO
, show_temp11
,
1036 static SENSOR_DEVICE_ATTR_2(temp3_max
, S_IWUSR
| S_IRUGO
, show_temp11
,
1038 static SENSOR_DEVICE_ATTR(temp3_crit
, S_IWUSR
| S_IRUGO
, show_temp8
,
1040 static SENSOR_DEVICE_ATTR(temp3_crit_hyst
, S_IRUGO
, show_temphyst
, NULL
, 6);
1041 static SENSOR_DEVICE_ATTR(temp3_emergency
, S_IWUSR
| S_IRUGO
, show_temp8
,
1043 static SENSOR_DEVICE_ATTR(temp3_emergency_hyst
, S_IRUGO
, show_temphyst
,
1046 static SENSOR_DEVICE_ATTR(temp3_crit_alarm
, S_IRUGO
, show_alarm
, NULL
, 9);
1047 static SENSOR_DEVICE_ATTR(temp3_fault
, S_IRUGO
, show_alarm
, NULL
, 10);
1048 static SENSOR_DEVICE_ATTR(temp3_min_alarm
, S_IRUGO
, show_alarm
, NULL
, 11);
1049 static SENSOR_DEVICE_ATTR(temp3_max_alarm
, S_IRUGO
, show_alarm
, NULL
, 12);
1050 static SENSOR_DEVICE_ATTR(temp3_emergency_alarm
, S_IRUGO
, show_alarm
, NULL
, 14);
1052 static struct attribute
*lm90_temp3_attributes
[] = {
1053 &sensor_dev_attr_temp3_input
.dev_attr
.attr
,
1054 &sensor_dev_attr_temp3_min
.dev_attr
.attr
,
1055 &sensor_dev_attr_temp3_max
.dev_attr
.attr
,
1056 &sensor_dev_attr_temp3_crit
.dev_attr
.attr
,
1057 &sensor_dev_attr_temp3_crit_hyst
.dev_attr
.attr
,
1058 &sensor_dev_attr_temp3_emergency
.dev_attr
.attr
,
1059 &sensor_dev_attr_temp3_emergency_hyst
.dev_attr
.attr
,
1061 &sensor_dev_attr_temp3_fault
.dev_attr
.attr
,
1062 &sensor_dev_attr_temp3_min_alarm
.dev_attr
.attr
,
1063 &sensor_dev_attr_temp3_max_alarm
.dev_attr
.attr
,
1064 &sensor_dev_attr_temp3_crit_alarm
.dev_attr
.attr
,
1065 &sensor_dev_attr_temp3_emergency_alarm
.dev_attr
.attr
,
1069 static const struct attribute_group lm90_temp3_group
= {
1070 .attrs
= lm90_temp3_attributes
,
1073 /* pec used for ADM1032 only */
1074 static ssize_t
show_pec(struct device
*dev
, struct device_attribute
*dummy
,
1077 struct i2c_client
*client
= to_i2c_client(dev
);
1078 return sprintf(buf
, "%d\n", !!(client
->flags
& I2C_CLIENT_PEC
));
1081 static ssize_t
set_pec(struct device
*dev
, struct device_attribute
*dummy
,
1082 const char *buf
, size_t count
)
1084 struct i2c_client
*client
= to_i2c_client(dev
);
1088 err
= strict_strtol(buf
, 10, &val
);
1094 client
->flags
&= ~I2C_CLIENT_PEC
;
1097 client
->flags
|= I2C_CLIENT_PEC
;
1106 static DEVICE_ATTR(pec
, S_IWUSR
| S_IRUGO
, show_pec
, set_pec
);
1112 /* Return 0 if detection is successful, -ENODEV otherwise */
1113 static int lm90_detect(struct i2c_client
*new_client
,
1114 struct i2c_board_info
*info
)
1116 struct i2c_adapter
*adapter
= new_client
->adapter
;
1117 int address
= new_client
->addr
;
1118 const char *name
= NULL
;
1119 int man_id
, chip_id
, reg_config1
, reg_convrate
;
1121 if (!i2c_check_functionality(adapter
, I2C_FUNC_SMBUS_BYTE_DATA
))
1124 /* detection and identification */
1125 if ((man_id
= i2c_smbus_read_byte_data(new_client
,
1126 LM90_REG_R_MAN_ID
)) < 0
1127 || (chip_id
= i2c_smbus_read_byte_data(new_client
,
1128 LM90_REG_R_CHIP_ID
)) < 0
1129 || (reg_config1
= i2c_smbus_read_byte_data(new_client
,
1130 LM90_REG_R_CONFIG1
)) < 0
1131 || (reg_convrate
= i2c_smbus_read_byte_data(new_client
,
1132 LM90_REG_R_CONVRATE
)) < 0)
1135 if ((address
== 0x4C || address
== 0x4D)
1136 && man_id
== 0x01) { /* National Semiconductor */
1139 reg_config2
= i2c_smbus_read_byte_data(new_client
,
1140 LM90_REG_R_CONFIG2
);
1141 if (reg_config2
< 0)
1144 if ((reg_config1
& 0x2A) == 0x00
1145 && (reg_config2
& 0xF8) == 0x00
1146 && reg_convrate
<= 0x09) {
1148 && (chip_id
& 0xF0) == 0x20) { /* LM90 */
1151 if ((chip_id
& 0xF0) == 0x30) { /* LM89/LM99 */
1153 dev_info(&adapter
->dev
,
1154 "Assuming LM99 chip at 0x%02x\n",
1156 dev_info(&adapter
->dev
,
1157 "If it is an LM89, instantiate it "
1158 "with the new_device sysfs "
1162 && (chip_id
& 0xF0) == 0x10) { /* LM86 */
1167 if ((address
== 0x4C || address
== 0x4D)
1168 && man_id
== 0x41) { /* Analog Devices */
1169 if ((chip_id
& 0xF0) == 0x40 /* ADM1032 */
1170 && (reg_config1
& 0x3F) == 0x00
1171 && reg_convrate
<= 0x0A) {
1173 /* The ADM1032 supports PEC, but only if combined
1174 transactions are not used. */
1175 if (i2c_check_functionality(adapter
,
1176 I2C_FUNC_SMBUS_BYTE
))
1177 info
->flags
|= I2C_CLIENT_PEC
;
1179 if (chip_id
== 0x51 /* ADT7461 */
1180 && (reg_config1
& 0x1B) == 0x00
1181 && reg_convrate
<= 0x0A) {
1184 if (chip_id
== 0x57 /* ADT7461A, NCT1008 */
1185 && (reg_config1
& 0x1B) == 0x00
1186 && reg_convrate
<= 0x0A) {
1190 if (man_id
== 0x4D) { /* Maxim */
1191 int reg_emerg
, reg_emerg2
, reg_status2
;
1194 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
1195 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
1196 * exists, both readings will reflect the same value. Otherwise,
1197 * the readings will be different.
1199 if ((reg_emerg
= i2c_smbus_read_byte_data(new_client
,
1200 MAX6659_REG_R_REMOTE_EMERG
)) < 0
1201 || i2c_smbus_read_byte_data(new_client
, LM90_REG_R_MAN_ID
) < 0
1202 || (reg_emerg2
= i2c_smbus_read_byte_data(new_client
,
1203 MAX6659_REG_R_REMOTE_EMERG
)) < 0
1204 || (reg_status2
= i2c_smbus_read_byte_data(new_client
,
1205 MAX6696_REG_R_STATUS2
)) < 0)
1209 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
1210 * register. Reading from that address will return the last
1211 * read value, which in our case is those of the man_id
1212 * register. Likewise, the config1 register seems to lack a
1213 * low nibble, so the value will be those of the previous
1214 * read, so in our case those of the man_id register.
1215 * MAX6659 has a third set of upper temperature limit registers.
1216 * Those registers also return values on MAX6657 and MAX6658,
1217 * thus the only way to detect MAX6659 is by its address.
1218 * For this reason it will be mis-detected as MAX6657 if its
1221 if (chip_id
== man_id
1222 && (address
== 0x4C || address
== 0x4D || address
== 0x4E)
1223 && (reg_config1
& 0x1F) == (man_id
& 0x0F)
1224 && reg_convrate
<= 0x09) {
1225 if (address
== 0x4C)
1231 * Even though MAX6695 and MAX6696 do not have a chip ID
1232 * register, reading it returns 0x01. Bit 4 of the config1
1233 * register is unused and should return zero when read. Bit 0 of
1234 * the status2 register is unused and should return zero when
1237 * MAX6695 and MAX6696 have an additional set of temperature
1238 * limit registers. We can detect those chips by checking if
1239 * one of those registers exists.
1242 && (reg_config1
& 0x10) == 0x00
1243 && (reg_status2
& 0x01) == 0x00
1244 && reg_emerg
== reg_emerg2
1245 && reg_convrate
<= 0x07) {
1249 * The chip_id register of the MAX6680 and MAX6681 holds the
1250 * revision of the chip. The lowest bit of the config1 register
1251 * is unused and should return zero when read, so should the
1252 * second to last bit of config1 (software reset).
1255 && (reg_config1
& 0x03) == 0x00
1256 && reg_convrate
<= 0x07) {
1260 * The chip_id register of the MAX6646/6647/6649 holds the
1261 * revision of the chip. The lowest 6 bits of the config1
1262 * register are unused and should return zero when read.
1265 && (reg_config1
& 0x3f) == 0x00
1266 && reg_convrate
<= 0x07) {
1271 && man_id
== 0x5C) { /* Winbond/Nuvoton */
1274 reg_config2
= i2c_smbus_read_byte_data(new_client
,
1275 LM90_REG_R_CONFIG2
);
1276 if (reg_config2
< 0)
1279 if ((reg_config1
& 0x2A) == 0x00
1280 && (reg_config2
& 0xF8) == 0x00) {
1281 if (chip_id
== 0x01 /* W83L771W/G */
1282 && reg_convrate
<= 0x09) {
1285 if ((chip_id
& 0xFE) == 0x10 /* W83L771AWG/ASG */
1286 && reg_convrate
<= 0x08) {
1291 if (man_id
== 0xA1) { /* NXP Semiconductor/Philips */
1292 if (chip_id
== 0x00 && address
>= 0x48 && address
<= 0x4F) {
1297 if (!name
) { /* identification failed */
1298 dev_dbg(&adapter
->dev
,
1299 "Unsupported chip at 0x%02x (man_id=0x%02X, "
1300 "chip_id=0x%02X)\n", address
, man_id
, chip_id
);
1304 strlcpy(info
->type
, name
, I2C_NAME_SIZE
);
1309 static void lm90_remove_files(struct i2c_client
*client
, struct lm90_data
*data
)
1311 if (data
->flags
& LM90_HAVE_TEMP3
)
1312 sysfs_remove_group(&client
->dev
.kobj
, &lm90_temp3_group
);
1313 if (data
->flags
& LM90_HAVE_EMERGENCY_ALARM
)
1314 sysfs_remove_group(&client
->dev
.kobj
,
1315 &lm90_emergency_alarm_group
);
1316 if (data
->flags
& LM90_HAVE_EMERGENCY
)
1317 sysfs_remove_group(&client
->dev
.kobj
,
1318 &lm90_emergency_group
);
1319 if (data
->flags
& LM90_HAVE_OFFSET
)
1320 device_remove_file(&client
->dev
,
1321 &sensor_dev_attr_temp2_offset
.dev_attr
);
1322 device_remove_file(&client
->dev
, &dev_attr_pec
);
1323 sysfs_remove_group(&client
->dev
.kobj
, &lm90_group
);
1326 static void lm90_init_client(struct i2c_client
*client
)
1328 u8 config
, convrate
;
1329 struct lm90_data
*data
= i2c_get_clientdata(client
);
1331 if (lm90_read_reg(client
, LM90_REG_R_CONVRATE
, &convrate
) < 0) {
1332 dev_warn(&client
->dev
, "Failed to read convrate register!\n");
1333 convrate
= LM90_DEF_CONVRATE_RVAL
;
1335 data
->convrate_orig
= convrate
;
1338 * Start the conversions.
1340 lm90_set_convrate(client
, data
, 500); /* 500ms; 2Hz conversion rate */
1341 if (lm90_read_reg(client
, LM90_REG_R_CONFIG1
, &config
) < 0) {
1342 dev_warn(&client
->dev
, "Initialization failed!\n");
1345 data
->config_orig
= config
;
1347 /* Check Temperature Range Select */
1348 if (data
->kind
== adt7461
) {
1350 data
->flags
|= LM90_FLAG_ADT7461_EXT
;
1354 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
1355 * 0.125 degree resolution) and range (0x08, extend range
1356 * to -64 degree) mode for the remote temperature sensor.
1358 if (data
->kind
== max6680
)
1362 * Select external channel 0 for max6695/96
1364 if (data
->kind
== max6696
)
1367 config
&= 0xBF; /* run */
1368 if (config
!= data
->config_orig
) /* Only write if changed */
1369 i2c_smbus_write_byte_data(client
, LM90_REG_W_CONFIG1
, config
);
1372 static int lm90_probe(struct i2c_client
*new_client
,
1373 const struct i2c_device_id
*id
)
1375 struct i2c_adapter
*adapter
= to_i2c_adapter(new_client
->dev
.parent
);
1376 struct lm90_data
*data
;
1379 data
= kzalloc(sizeof(struct lm90_data
), GFP_KERNEL
);
1384 i2c_set_clientdata(new_client
, data
);
1385 mutex_init(&data
->update_lock
);
1387 /* Set the device type */
1388 data
->kind
= id
->driver_data
;
1389 if (data
->kind
== adm1032
) {
1390 if (!i2c_check_functionality(adapter
, I2C_FUNC_SMBUS_BYTE
))
1391 new_client
->flags
&= ~I2C_CLIENT_PEC
;
1394 /* Different devices have different alarm bits triggering the
1396 data
->alert_alarms
= lm90_params
[data
->kind
].alert_alarms
;
1398 /* Set chip capabilities */
1399 data
->flags
= lm90_params
[data
->kind
].flags
;
1401 /* Set maximum conversion rate */
1402 data
->max_convrate
= lm90_params
[data
->kind
].max_convrate
;
1404 if (data
->flags
& LM90_HAVE_LOCAL_EXT
) {
1405 data
->reg_local_ext
= lm90_params
[data
->kind
].reg_local_ext
;
1406 WARN_ON(data
->reg_local_ext
== 0);
1409 /* Initialize the LM90 chip */
1410 lm90_init_client(new_client
);
1412 /* Register sysfs hooks */
1413 err
= sysfs_create_group(&new_client
->dev
.kobj
, &lm90_group
);
1416 if (new_client
->flags
& I2C_CLIENT_PEC
) {
1417 err
= device_create_file(&new_client
->dev
, &dev_attr_pec
);
1419 goto exit_remove_files
;
1421 if (data
->flags
& LM90_HAVE_OFFSET
) {
1422 err
= device_create_file(&new_client
->dev
,
1423 &sensor_dev_attr_temp2_offset
.dev_attr
);
1425 goto exit_remove_files
;
1427 if (data
->flags
& LM90_HAVE_EMERGENCY
) {
1428 err
= sysfs_create_group(&new_client
->dev
.kobj
,
1429 &lm90_emergency_group
);
1431 goto exit_remove_files
;
1433 if (data
->flags
& LM90_HAVE_EMERGENCY_ALARM
) {
1434 err
= sysfs_create_group(&new_client
->dev
.kobj
,
1435 &lm90_emergency_alarm_group
);
1437 goto exit_remove_files
;
1439 if (data
->flags
& LM90_HAVE_TEMP3
) {
1440 err
= sysfs_create_group(&new_client
->dev
.kobj
,
1443 goto exit_remove_files
;
1446 data
->hwmon_dev
= hwmon_device_register(&new_client
->dev
);
1447 if (IS_ERR(data
->hwmon_dev
)) {
1448 err
= PTR_ERR(data
->hwmon_dev
);
1449 goto exit_remove_files
;
1455 lm90_remove_files(new_client
, data
);
1462 static int lm90_remove(struct i2c_client
*client
)
1464 struct lm90_data
*data
= i2c_get_clientdata(client
);
1466 hwmon_device_unregister(data
->hwmon_dev
);
1467 lm90_remove_files(client
, data
);
1469 /* Restore initial configuration */
1470 i2c_smbus_write_byte_data(client
, LM90_REG_W_CONVRATE
,
1471 data
->convrate_orig
);
1472 i2c_smbus_write_byte_data(client
, LM90_REG_W_CONFIG1
,
1479 static void lm90_alert(struct i2c_client
*client
, unsigned int flag
)
1481 struct lm90_data
*data
= i2c_get_clientdata(client
);
1482 u8 config
, alarms
, alarms2
= 0;
1484 lm90_read_reg(client
, LM90_REG_R_STATUS
, &alarms
);
1486 if (data
->kind
== max6696
)
1487 lm90_read_reg(client
, MAX6696_REG_R_STATUS2
, &alarms2
);
1489 if ((alarms
& 0x7f) == 0 && (alarms2
& 0xfe) == 0) {
1490 dev_info(&client
->dev
, "Everything OK\n");
1493 dev_warn(&client
->dev
,
1494 "temp%d out of range, please check!\n", 1);
1496 dev_warn(&client
->dev
,
1497 "temp%d out of range, please check!\n", 2);
1499 dev_warn(&client
->dev
,
1500 "temp%d diode open, please check!\n", 2);
1503 dev_warn(&client
->dev
,
1504 "temp%d out of range, please check!\n", 3);
1506 /* Disable ALERT# output, because these chips don't implement
1507 SMBus alert correctly; they should only hold the alert line
1509 if ((data
->flags
& LM90_HAVE_BROKEN_ALERT
)
1510 && (alarms
& data
->alert_alarms
)) {
1511 dev_dbg(&client
->dev
, "Disabling ALERT#\n");
1512 lm90_read_reg(client
, LM90_REG_R_CONFIG1
, &config
);
1513 i2c_smbus_write_byte_data(client
, LM90_REG_W_CONFIG1
,
1519 static struct i2c_driver lm90_driver
= {
1520 .class = I2C_CLASS_HWMON
,
1524 .probe
= lm90_probe
,
1525 .remove
= lm90_remove
,
1526 .alert
= lm90_alert
,
1527 .id_table
= lm90_id
,
1528 .detect
= lm90_detect
,
1529 .address_list
= normal_i2c
,
1532 static int __init
sensors_lm90_init(void)
1534 return i2c_add_driver(&lm90_driver
);
1537 static void __exit
sensors_lm90_exit(void)
1539 i2c_del_driver(&lm90_driver
);
1542 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1543 MODULE_DESCRIPTION("LM90/ADM1032 driver");
1544 MODULE_LICENSE("GPL");
1546 module_init(sensors_lm90_init
);
1547 module_exit(sensors_lm90_exit
);