4 * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl>
5 * Philip Edelbrock <phil@netroedge.com>
6 * Stephen Rousset <stephen.rousset@rocketlogix.com>
7 * Dan Eaton <dan.eaton@rocketlogix.com>
8 * Copyright (C) 2004,2007 Jean Delvare <khali@linux-fr.org>
10 * Original port to Linux 2.6 by Jeff Oliver.
12 * The LM87 is a sensor chip made by National Semiconductor. It monitors up
13 * to 8 voltages (including its own power source), up to three temperatures
14 * (its own plus up to two external ones) and up to two fans. The default
15 * configuration is 6 voltages, two temperatures and two fans (see below).
16 * Voltages are scaled internally with ratios such that the nominal value of
17 * each voltage correspond to a register value of 192 (which means a
18 * resolution of about 0.5% of the nominal value). Temperature values are
19 * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete
20 * datasheet can be obtained from National's website at:
21 * http://www.national.com/pf/LM/LM87.html
23 * Some functions share pins, so not all functions are available at the same
24 * time. Which are depends on the hardware setup. This driver assumes that
25 * the BIOS configured the chip correctly. In that respect, it differs from
26 * the original driver (from lm_sensors for Linux 2.4), which would force the
27 * LM87 to an arbitrary, compile-time chosen mode, regardless of the actual
29 * For reference, here is the list of exclusive functions:
30 * - in0+in5 (default) or temp3
31 * - fan1 (default) or in6
32 * - fan2 (default) or in7
33 * - VID lines (default) or IRQ lines (not handled by this driver)
35 * The LM87 additionally features an analog output, supposedly usable to
36 * control the speed of a fan. All new chips use pulse width modulation
37 * instead. The LM87 is the only hardware monitoring chipset I know of
38 * which uses amplitude modulation. Be careful when using this feature.
40 * This driver also supports the ADM1024, a sensor chip made by Analog
41 * Devices. That chip is fully compatible with the LM87. Complete
42 * datasheet can be obtained from Analog's website at:
43 * http://www.analog.com/en/prod/0,2877,ADM1024,00.html
45 * This program is free software; you can redistribute it and/or modify
46 * it under the terms of the GNU General Public License as published by
47 * the Free Software Foundation; either version 2 of the License, or
48 * (at your option) any later version.
50 * This program is distributed in the hope that it will be useful,
51 * but WITHOUT ANY WARRANTY; without even the implied warranty of
52 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
53 * GNU General Public License for more details.
55 * You should have received a copy of the GNU General Public License
56 * along with this program; if not, write to the Free Software
57 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
60 #include <linux/module.h>
61 #include <linux/init.h>
62 #include <linux/slab.h>
63 #include <linux/jiffies.h>
64 #include <linux/i2c.h>
65 #include <linux/hwmon.h>
66 #include <linux/hwmon-sysfs.h>
67 #include <linux/hwmon-vid.h>
68 #include <linux/err.h>
69 #include <linux/mutex.h>
73 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
76 static unsigned short normal_i2c
[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END
};
82 I2C_CLIENT_INSMOD_2(lm87
, adm1024
);
89 #define LM87_REG_IN(nr) (0x20 + (nr))
90 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
91 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
93 #define LM87_REG_AIN(nr) (0x28 + (nr))
94 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
95 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
97 static u8 LM87_REG_TEMP
[3] = { 0x27, 0x26, 0x20 };
98 static u8 LM87_REG_TEMP_HIGH
[3] = { 0x39, 0x37, 0x2B };
99 static u8 LM87_REG_TEMP_LOW
[3] = { 0x3A, 0x38, 0x2C };
101 #define LM87_REG_TEMP_HW_INT_LOCK 0x13
102 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14
103 #define LM87_REG_TEMP_HW_INT 0x17
104 #define LM87_REG_TEMP_HW_EXT 0x18
107 #define LM87_REG_FAN(nr) (0x28 + (nr))
108 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
109 #define LM87_REG_AOUT 0x19
111 #define LM87_REG_CONFIG 0x40
112 #define LM87_REG_CHANNEL_MODE 0x16
113 #define LM87_REG_VID_FAN_DIV 0x47
114 #define LM87_REG_VID4 0x49
116 #define LM87_REG_ALARMS1 0x41
117 #define LM87_REG_ALARMS2 0x42
119 #define LM87_REG_COMPANY_ID 0x3E
120 #define LM87_REG_REVISION 0x3F
123 * Conversions and various macros
124 * The LM87 uses signed 8-bit values for temperatures.
127 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
128 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
129 (val) * 192 >= (scale) * 255 ? 255 : \
130 ((val) * 192 + (scale)/2) / (scale))
132 #define TEMP_FROM_REG(reg) ((reg) * 1000)
133 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
134 (val) >= 126500 ? 127 : \
135 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
137 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \
138 (1350000 + (reg)*(div) / 2) / ((reg)*(div)))
139 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \
140 (1350000 + (val)*(div) / 2) / ((val)*(div)))
142 #define FAN_DIV_FROM_REG(reg) (1 << (reg))
144 /* analog out is 9.80mV/LSB */
145 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
146 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
147 (val) >= 2500 ? 255 : \
148 ((val) * 10 + 49) / 98)
151 #define CHAN_NO_FAN(nr) (1 << (nr))
152 #define CHAN_TEMP3 (1 << 2)
153 #define CHAN_VCC_5V (1 << 3)
154 #define CHAN_NO_VID (1 << 7)
157 * Functions declaration
160 static int lm87_attach_adapter(struct i2c_adapter
*adapter
);
161 static int lm87_detect(struct i2c_adapter
*adapter
, int address
, int kind
);
162 static void lm87_init_client(struct i2c_client
*client
);
163 static int lm87_detach_client(struct i2c_client
*client
);
164 static struct lm87_data
*lm87_update_device(struct device
*dev
);
167 * Driver data (common to all clients)
170 static struct i2c_driver lm87_driver
= {
174 .attach_adapter
= lm87_attach_adapter
,
175 .detach_client
= lm87_detach_client
,
179 * Client data (each client gets its own)
183 struct i2c_client client
;
184 struct device
*hwmon_dev
;
185 struct mutex update_lock
;
186 char valid
; /* zero until following fields are valid */
187 unsigned long last_updated
; /* In jiffies */
189 u8 channel
; /* register value */
191 u8 in
[8]; /* register value */
192 u8 in_max
[8]; /* register value */
193 u8 in_min
[8]; /* register value */
196 s8 temp
[3]; /* register value */
197 s8 temp_high
[3]; /* register value */
198 s8 temp_low
[3]; /* register value */
199 s8 temp_crit_int
; /* min of two register values */
200 s8 temp_crit_ext
; /* min of two register values */
202 u8 fan
[2]; /* register value */
203 u8 fan_min
[2]; /* register value */
204 u8 fan_div
[2]; /* register value, shifted right */
205 u8 aout
; /* register value */
207 u16 alarms
; /* register values, combined */
208 u8 vid
; /* register values, combined */
216 static inline int lm87_read_value(struct i2c_client
*client
, u8 reg
)
218 return i2c_smbus_read_byte_data(client
, reg
);
221 static inline int lm87_write_value(struct i2c_client
*client
, u8 reg
, u8 value
)
223 return i2c_smbus_write_byte_data(client
, reg
, value
);
226 #define show_in(offset) \
227 static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
229 struct lm87_data *data = lm87_update_device(dev); \
230 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
231 data->in_scale[offset])); \
233 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
235 struct lm87_data *data = lm87_update_device(dev); \
236 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
237 data->in_scale[offset])); \
239 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
241 struct lm87_data *data = lm87_update_device(dev); \
242 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
243 data->in_scale[offset])); \
245 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
246 show_in##offset##_input, NULL);
256 static void set_in_min(struct device
*dev
, const char *buf
, int nr
)
258 struct i2c_client
*client
= to_i2c_client(dev
);
259 struct lm87_data
*data
= i2c_get_clientdata(client
);
260 long val
= simple_strtol(buf
, NULL
, 10);
262 mutex_lock(&data
->update_lock
);
263 data
->in_min
[nr
] = IN_TO_REG(val
, data
->in_scale
[nr
]);
264 lm87_write_value(client
, nr
<6 ? LM87_REG_IN_MIN(nr
) :
265 LM87_REG_AIN_MIN(nr
-6), data
->in_min
[nr
]);
266 mutex_unlock(&data
->update_lock
);
269 static void set_in_max(struct device
*dev
, const char *buf
, int nr
)
271 struct i2c_client
*client
= to_i2c_client(dev
);
272 struct lm87_data
*data
= i2c_get_clientdata(client
);
273 long val
= simple_strtol(buf
, NULL
, 10);
275 mutex_lock(&data
->update_lock
);
276 data
->in_max
[nr
] = IN_TO_REG(val
, data
->in_scale
[nr
]);
277 lm87_write_value(client
, nr
<6 ? LM87_REG_IN_MAX(nr
) :
278 LM87_REG_AIN_MAX(nr
-6), data
->in_max
[nr
]);
279 mutex_unlock(&data
->update_lock
);
282 #define set_in(offset) \
283 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
284 const char *buf, size_t count) \
286 set_in_min(dev, buf, offset); \
289 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
290 const char *buf, size_t count) \
292 set_in_max(dev, buf, offset); \
295 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
296 show_in##offset##_min, set_in##offset##_min); \
297 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
298 show_in##offset##_max, set_in##offset##_max);
308 #define show_temp(offset) \
309 static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
311 struct lm87_data *data = lm87_update_device(dev); \
312 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
314 static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
316 struct lm87_data *data = lm87_update_device(dev); \
317 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
319 static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
321 struct lm87_data *data = lm87_update_device(dev); \
322 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
324 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
325 show_temp##offset##_input, NULL);
330 static void set_temp_low(struct device
*dev
, const char *buf
, int nr
)
332 struct i2c_client
*client
= to_i2c_client(dev
);
333 struct lm87_data
*data
= i2c_get_clientdata(client
);
334 long val
= simple_strtol(buf
, NULL
, 10);
336 mutex_lock(&data
->update_lock
);
337 data
->temp_low
[nr
] = TEMP_TO_REG(val
);
338 lm87_write_value(client
, LM87_REG_TEMP_LOW
[nr
], data
->temp_low
[nr
]);
339 mutex_unlock(&data
->update_lock
);
342 static void set_temp_high(struct device
*dev
, const char *buf
, int nr
)
344 struct i2c_client
*client
= to_i2c_client(dev
);
345 struct lm87_data
*data
= i2c_get_clientdata(client
);
346 long val
= simple_strtol(buf
, NULL
, 10);
348 mutex_lock(&data
->update_lock
);
349 data
->temp_high
[nr
] = TEMP_TO_REG(val
);
350 lm87_write_value(client
, LM87_REG_TEMP_HIGH
[nr
], data
->temp_high
[nr
]);
351 mutex_unlock(&data
->update_lock
);
354 #define set_temp(offset) \
355 static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
356 const char *buf, size_t count) \
358 set_temp_low(dev, buf, offset-1); \
361 static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
362 const char *buf, size_t count) \
364 set_temp_high(dev, buf, offset-1); \
367 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
368 show_temp##offset##_high, set_temp##offset##_high); \
369 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
370 show_temp##offset##_low, set_temp##offset##_low);
375 static ssize_t
show_temp_crit_int(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
377 struct lm87_data
*data
= lm87_update_device(dev
);
378 return sprintf(buf
, "%d\n", TEMP_FROM_REG(data
->temp_crit_int
));
381 static ssize_t
show_temp_crit_ext(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
383 struct lm87_data
*data
= lm87_update_device(dev
);
384 return sprintf(buf
, "%d\n", TEMP_FROM_REG(data
->temp_crit_ext
));
387 static DEVICE_ATTR(temp1_crit
, S_IRUGO
, show_temp_crit_int
, NULL
);
388 static DEVICE_ATTR(temp2_crit
, S_IRUGO
, show_temp_crit_ext
, NULL
);
389 static DEVICE_ATTR(temp3_crit
, S_IRUGO
, show_temp_crit_ext
, NULL
);
391 #define show_fan(offset) \
392 static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
394 struct lm87_data *data = lm87_update_device(dev); \
395 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
396 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
398 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
400 struct lm87_data *data = lm87_update_device(dev); \
401 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
402 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
404 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
406 struct lm87_data *data = lm87_update_device(dev); \
407 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
409 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
410 show_fan##offset##_input, NULL);
414 static void set_fan_min(struct device
*dev
, const char *buf
, int nr
)
416 struct i2c_client
*client
= to_i2c_client(dev
);
417 struct lm87_data
*data
= i2c_get_clientdata(client
);
418 long val
= simple_strtol(buf
, NULL
, 10);
420 mutex_lock(&data
->update_lock
);
421 data
->fan_min
[nr
] = FAN_TO_REG(val
,
422 FAN_DIV_FROM_REG(data
->fan_div
[nr
]));
423 lm87_write_value(client
, LM87_REG_FAN_MIN(nr
), data
->fan_min
[nr
]);
424 mutex_unlock(&data
->update_lock
);
427 /* Note: we save and restore the fan minimum here, because its value is
428 determined in part by the fan clock divider. This follows the principle
429 of least surprise; the user doesn't expect the fan minimum to change just
430 because the divider changed. */
431 static ssize_t
set_fan_div(struct device
*dev
, const char *buf
,
432 size_t count
, int nr
)
434 struct i2c_client
*client
= to_i2c_client(dev
);
435 struct lm87_data
*data
= i2c_get_clientdata(client
);
436 long val
= simple_strtol(buf
, NULL
, 10);
440 mutex_lock(&data
->update_lock
);
441 min
= FAN_FROM_REG(data
->fan_min
[nr
],
442 FAN_DIV_FROM_REG(data
->fan_div
[nr
]));
445 case 1: data
->fan_div
[nr
] = 0; break;
446 case 2: data
->fan_div
[nr
] = 1; break;
447 case 4: data
->fan_div
[nr
] = 2; break;
448 case 8: data
->fan_div
[nr
] = 3; break;
450 mutex_unlock(&data
->update_lock
);
454 reg
= lm87_read_value(client
, LM87_REG_VID_FAN_DIV
);
457 reg
= (reg
& 0xCF) | (data
->fan_div
[0] << 4);
460 reg
= (reg
& 0x3F) | (data
->fan_div
[1] << 6);
463 lm87_write_value(client
, LM87_REG_VID_FAN_DIV
, reg
);
465 data
->fan_min
[nr
] = FAN_TO_REG(min
, val
);
466 lm87_write_value(client
, LM87_REG_FAN_MIN(nr
),
468 mutex_unlock(&data
->update_lock
);
473 #define set_fan(offset) \
474 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
477 set_fan_min(dev, buf, offset-1); \
480 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
483 return set_fan_div(dev, buf, count, offset-1); \
485 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
486 show_fan##offset##_min, set_fan##offset##_min); \
487 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
488 show_fan##offset##_div, set_fan##offset##_div);
492 static ssize_t
show_alarms(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
494 struct lm87_data
*data
= lm87_update_device(dev
);
495 return sprintf(buf
, "%d\n", data
->alarms
);
497 static DEVICE_ATTR(alarms
, S_IRUGO
, show_alarms
, NULL
);
499 static ssize_t
show_vid(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
501 struct lm87_data
*data
= lm87_update_device(dev
);
502 return sprintf(buf
, "%d\n", vid_from_reg(data
->vid
, data
->vrm
));
504 static DEVICE_ATTR(cpu0_vid
, S_IRUGO
, show_vid
, NULL
);
506 static ssize_t
show_vrm(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
508 struct lm87_data
*data
= dev_get_drvdata(dev
);
509 return sprintf(buf
, "%d\n", data
->vrm
);
511 static ssize_t
set_vrm(struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
513 struct i2c_client
*client
= to_i2c_client(dev
);
514 struct lm87_data
*data
= i2c_get_clientdata(client
);
515 data
->vrm
= simple_strtoul(buf
, NULL
, 10);
518 static DEVICE_ATTR(vrm
, S_IRUGO
| S_IWUSR
, show_vrm
, set_vrm
);
520 static ssize_t
show_aout(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
522 struct lm87_data
*data
= lm87_update_device(dev
);
523 return sprintf(buf
, "%d\n", AOUT_FROM_REG(data
->aout
));
525 static ssize_t
set_aout(struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
527 struct i2c_client
*client
= to_i2c_client(dev
);
528 struct lm87_data
*data
= i2c_get_clientdata(client
);
529 long val
= simple_strtol(buf
, NULL
, 10);
531 mutex_lock(&data
->update_lock
);
532 data
->aout
= AOUT_TO_REG(val
);
533 lm87_write_value(client
, LM87_REG_AOUT
, data
->aout
);
534 mutex_unlock(&data
->update_lock
);
537 static DEVICE_ATTR(aout_output
, S_IRUGO
| S_IWUSR
, show_aout
, set_aout
);
539 static ssize_t
show_alarm(struct device
*dev
, struct device_attribute
*attr
,
542 struct lm87_data
*data
= lm87_update_device(dev
);
543 int bitnr
= to_sensor_dev_attr(attr
)->index
;
544 return sprintf(buf
, "%u\n", (data
->alarms
>> bitnr
) & 1);
546 static SENSOR_DEVICE_ATTR(in0_alarm
, S_IRUGO
, show_alarm
, NULL
, 0);
547 static SENSOR_DEVICE_ATTR(in1_alarm
, S_IRUGO
, show_alarm
, NULL
, 1);
548 static SENSOR_DEVICE_ATTR(in2_alarm
, S_IRUGO
, show_alarm
, NULL
, 2);
549 static SENSOR_DEVICE_ATTR(in3_alarm
, S_IRUGO
, show_alarm
, NULL
, 3);
550 static SENSOR_DEVICE_ATTR(in4_alarm
, S_IRUGO
, show_alarm
, NULL
, 8);
551 static SENSOR_DEVICE_ATTR(in5_alarm
, S_IRUGO
, show_alarm
, NULL
, 9);
552 static SENSOR_DEVICE_ATTR(in6_alarm
, S_IRUGO
, show_alarm
, NULL
, 6);
553 static SENSOR_DEVICE_ATTR(in7_alarm
, S_IRUGO
, show_alarm
, NULL
, 7);
554 static SENSOR_DEVICE_ATTR(temp1_alarm
, S_IRUGO
, show_alarm
, NULL
, 4);
555 static SENSOR_DEVICE_ATTR(temp2_alarm
, S_IRUGO
, show_alarm
, NULL
, 5);
556 static SENSOR_DEVICE_ATTR(temp3_alarm
, S_IRUGO
, show_alarm
, NULL
, 5);
557 static SENSOR_DEVICE_ATTR(fan1_alarm
, S_IRUGO
, show_alarm
, NULL
, 6);
558 static SENSOR_DEVICE_ATTR(fan2_alarm
, S_IRUGO
, show_alarm
, NULL
, 7);
559 static SENSOR_DEVICE_ATTR(temp2_fault
, S_IRUGO
, show_alarm
, NULL
, 14);
560 static SENSOR_DEVICE_ATTR(temp3_fault
, S_IRUGO
, show_alarm
, NULL
, 15);
566 static int lm87_attach_adapter(struct i2c_adapter
*adapter
)
568 if (!(adapter
->class & I2C_CLASS_HWMON
))
570 return i2c_probe(adapter
, &addr_data
, lm87_detect
);
573 static struct attribute
*lm87_attributes
[] = {
574 &dev_attr_in1_input
.attr
,
575 &dev_attr_in1_min
.attr
,
576 &dev_attr_in1_max
.attr
,
577 &sensor_dev_attr_in1_alarm
.dev_attr
.attr
,
578 &dev_attr_in2_input
.attr
,
579 &dev_attr_in2_min
.attr
,
580 &dev_attr_in2_max
.attr
,
581 &sensor_dev_attr_in2_alarm
.dev_attr
.attr
,
582 &dev_attr_in3_input
.attr
,
583 &dev_attr_in3_min
.attr
,
584 &dev_attr_in3_max
.attr
,
585 &sensor_dev_attr_in3_alarm
.dev_attr
.attr
,
586 &dev_attr_in4_input
.attr
,
587 &dev_attr_in4_min
.attr
,
588 &dev_attr_in4_max
.attr
,
589 &sensor_dev_attr_in4_alarm
.dev_attr
.attr
,
591 &dev_attr_temp1_input
.attr
,
592 &dev_attr_temp1_max
.attr
,
593 &dev_attr_temp1_min
.attr
,
594 &dev_attr_temp1_crit
.attr
,
595 &sensor_dev_attr_temp1_alarm
.dev_attr
.attr
,
596 &dev_attr_temp2_input
.attr
,
597 &dev_attr_temp2_max
.attr
,
598 &dev_attr_temp2_min
.attr
,
599 &dev_attr_temp2_crit
.attr
,
600 &sensor_dev_attr_temp2_alarm
.dev_attr
.attr
,
601 &sensor_dev_attr_temp2_fault
.dev_attr
.attr
,
603 &dev_attr_alarms
.attr
,
604 &dev_attr_aout_output
.attr
,
609 static const struct attribute_group lm87_group
= {
610 .attrs
= lm87_attributes
,
613 static struct attribute
*lm87_attributes_opt
[] = {
614 &dev_attr_in6_input
.attr
,
615 &dev_attr_in6_min
.attr
,
616 &dev_attr_in6_max
.attr
,
617 &sensor_dev_attr_in6_alarm
.dev_attr
.attr
,
619 &dev_attr_fan1_input
.attr
,
620 &dev_attr_fan1_min
.attr
,
621 &dev_attr_fan1_div
.attr
,
622 &sensor_dev_attr_fan1_alarm
.dev_attr
.attr
,
624 &dev_attr_in7_input
.attr
,
625 &dev_attr_in7_min
.attr
,
626 &dev_attr_in7_max
.attr
,
627 &sensor_dev_attr_in7_alarm
.dev_attr
.attr
,
629 &dev_attr_fan2_input
.attr
,
630 &dev_attr_fan2_min
.attr
,
631 &dev_attr_fan2_div
.attr
,
632 &sensor_dev_attr_fan2_alarm
.dev_attr
.attr
,
634 &dev_attr_temp3_input
.attr
,
635 &dev_attr_temp3_max
.attr
,
636 &dev_attr_temp3_min
.attr
,
637 &dev_attr_temp3_crit
.attr
,
638 &sensor_dev_attr_temp3_alarm
.dev_attr
.attr
,
639 &sensor_dev_attr_temp3_fault
.dev_attr
.attr
,
641 &dev_attr_in0_input
.attr
,
642 &dev_attr_in0_min
.attr
,
643 &dev_attr_in0_max
.attr
,
644 &sensor_dev_attr_in0_alarm
.dev_attr
.attr
,
645 &dev_attr_in5_input
.attr
,
646 &dev_attr_in5_min
.attr
,
647 &dev_attr_in5_max
.attr
,
648 &sensor_dev_attr_in5_alarm
.dev_attr
.attr
,
650 &dev_attr_cpu0_vid
.attr
,
656 static const struct attribute_group lm87_group_opt
= {
657 .attrs
= lm87_attributes_opt
,
661 * The following function does more than just detection. If detection
662 * succeeds, it also registers the new chip.
664 static int lm87_detect(struct i2c_adapter
*adapter
, int address
, int kind
)
666 struct i2c_client
*new_client
;
667 struct lm87_data
*data
;
669 static const char *names
[] = { "lm87", "adm1024" };
671 if (!i2c_check_functionality(adapter
, I2C_FUNC_SMBUS_BYTE_DATA
))
674 if (!(data
= kzalloc(sizeof(struct lm87_data
), GFP_KERNEL
))) {
679 /* The common I2C client data is placed right before the
680 LM87-specific data. */
681 new_client
= &data
->client
;
682 i2c_set_clientdata(new_client
, data
);
683 new_client
->addr
= address
;
684 new_client
->adapter
= adapter
;
685 new_client
->driver
= &lm87_driver
;
686 new_client
->flags
= 0;
688 /* Default to an LM87 if forced */
692 /* Now, we do the remaining detection. */
694 u8 cid
= lm87_read_value(new_client
, LM87_REG_COMPANY_ID
);
695 u8 rev
= lm87_read_value(new_client
, LM87_REG_REVISION
);
697 if (cid
== 0x02 /* National Semiconductor */
698 && (rev
>= 0x01 && rev
<= 0x08))
700 else if (cid
== 0x41 /* Analog Devices */
701 && (rev
& 0xf0) == 0x10)
705 || (lm87_read_value(new_client
, LM87_REG_CONFIG
) & 0x80)) {
706 dev_dbg(&adapter
->dev
,
707 "LM87 detection failed at 0x%02x.\n",
713 /* We can fill in the remaining client fields */
714 strlcpy(new_client
->name
, names
[kind
- 1], I2C_NAME_SIZE
);
716 mutex_init(&data
->update_lock
);
718 /* Tell the I2C layer a new client has arrived */
719 if ((err
= i2c_attach_client(new_client
)))
722 /* Initialize the LM87 chip */
723 lm87_init_client(new_client
);
725 data
->in_scale
[0] = 2500;
726 data
->in_scale
[1] = 2700;
727 data
->in_scale
[2] = (data
->channel
& CHAN_VCC_5V
) ? 5000 : 3300;
728 data
->in_scale
[3] = 5000;
729 data
->in_scale
[4] = 12000;
730 data
->in_scale
[5] = 2700;
731 data
->in_scale
[6] = 1875;
732 data
->in_scale
[7] = 1875;
734 /* Register sysfs hooks */
735 if ((err
= sysfs_create_group(&new_client
->dev
.kobj
, &lm87_group
)))
738 if (data
->channel
& CHAN_NO_FAN(0)) {
739 if ((err
= device_create_file(&new_client
->dev
,
740 &dev_attr_in6_input
))
741 || (err
= device_create_file(&new_client
->dev
,
743 || (err
= device_create_file(&new_client
->dev
,
745 || (err
= device_create_file(&new_client
->dev
,
746 &sensor_dev_attr_in6_alarm
.dev_attr
)))
749 if ((err
= device_create_file(&new_client
->dev
,
750 &dev_attr_fan1_input
))
751 || (err
= device_create_file(&new_client
->dev
,
753 || (err
= device_create_file(&new_client
->dev
,
755 || (err
= device_create_file(&new_client
->dev
,
756 &sensor_dev_attr_fan1_alarm
.dev_attr
)))
760 if (data
->channel
& CHAN_NO_FAN(1)) {
761 if ((err
= device_create_file(&new_client
->dev
,
762 &dev_attr_in7_input
))
763 || (err
= device_create_file(&new_client
->dev
,
765 || (err
= device_create_file(&new_client
->dev
,
767 || (err
= device_create_file(&new_client
->dev
,
768 &sensor_dev_attr_in7_alarm
.dev_attr
)))
771 if ((err
= device_create_file(&new_client
->dev
,
772 &dev_attr_fan2_input
))
773 || (err
= device_create_file(&new_client
->dev
,
775 || (err
= device_create_file(&new_client
->dev
,
777 || (err
= device_create_file(&new_client
->dev
,
778 &sensor_dev_attr_fan2_alarm
.dev_attr
)))
782 if (data
->channel
& CHAN_TEMP3
) {
783 if ((err
= device_create_file(&new_client
->dev
,
784 &dev_attr_temp3_input
))
785 || (err
= device_create_file(&new_client
->dev
,
786 &dev_attr_temp3_max
))
787 || (err
= device_create_file(&new_client
->dev
,
788 &dev_attr_temp3_min
))
789 || (err
= device_create_file(&new_client
->dev
,
790 &dev_attr_temp3_crit
))
791 || (err
= device_create_file(&new_client
->dev
,
792 &sensor_dev_attr_temp3_alarm
.dev_attr
))
793 || (err
= device_create_file(&new_client
->dev
,
794 &sensor_dev_attr_temp3_fault
.dev_attr
)))
797 if ((err
= device_create_file(&new_client
->dev
,
798 &dev_attr_in0_input
))
799 || (err
= device_create_file(&new_client
->dev
,
801 || (err
= device_create_file(&new_client
->dev
,
803 || (err
= device_create_file(&new_client
->dev
,
804 &sensor_dev_attr_in0_alarm
.dev_attr
))
805 || (err
= device_create_file(&new_client
->dev
,
806 &dev_attr_in5_input
))
807 || (err
= device_create_file(&new_client
->dev
,
809 || (err
= device_create_file(&new_client
->dev
,
811 || (err
= device_create_file(&new_client
->dev
,
812 &sensor_dev_attr_in5_alarm
.dev_attr
)))
816 if (!(data
->channel
& CHAN_NO_VID
)) {
817 data
->vrm
= vid_which_vrm();
818 if ((err
= device_create_file(&new_client
->dev
,
820 || (err
= device_create_file(&new_client
->dev
,
825 data
->hwmon_dev
= hwmon_device_register(&new_client
->dev
);
826 if (IS_ERR(data
->hwmon_dev
)) {
827 err
= PTR_ERR(data
->hwmon_dev
);
834 sysfs_remove_group(&new_client
->dev
.kobj
, &lm87_group
);
835 sysfs_remove_group(&new_client
->dev
.kobj
, &lm87_group_opt
);
837 i2c_detach_client(new_client
);
844 static void lm87_init_client(struct i2c_client
*client
)
846 struct lm87_data
*data
= i2c_get_clientdata(client
);
849 data
->channel
= lm87_read_value(client
, LM87_REG_CHANNEL_MODE
);
851 config
= lm87_read_value(client
, LM87_REG_CONFIG
);
852 if (!(config
& 0x01)) {
855 /* Limits are left uninitialized after power-up */
856 for (i
= 1; i
< 6; i
++) {
857 lm87_write_value(client
, LM87_REG_IN_MIN(i
), 0x00);
858 lm87_write_value(client
, LM87_REG_IN_MAX(i
), 0xFF);
860 for (i
= 0; i
< 2; i
++) {
861 lm87_write_value(client
, LM87_REG_TEMP_HIGH
[i
], 0x7F);
862 lm87_write_value(client
, LM87_REG_TEMP_LOW
[i
], 0x00);
863 lm87_write_value(client
, LM87_REG_AIN_MIN(i
), 0x00);
864 lm87_write_value(client
, LM87_REG_AIN_MAX(i
), 0xFF);
866 if (data
->channel
& CHAN_TEMP3
) {
867 lm87_write_value(client
, LM87_REG_TEMP_HIGH
[2], 0x7F);
868 lm87_write_value(client
, LM87_REG_TEMP_LOW
[2], 0x00);
870 lm87_write_value(client
, LM87_REG_IN_MIN(0), 0x00);
871 lm87_write_value(client
, LM87_REG_IN_MAX(0), 0xFF);
874 if ((config
& 0x81) != 0x01) {
875 /* Start monitoring */
876 lm87_write_value(client
, LM87_REG_CONFIG
,
877 (config
& 0xF7) | 0x01);
881 static int lm87_detach_client(struct i2c_client
*client
)
883 struct lm87_data
*data
= i2c_get_clientdata(client
);
886 hwmon_device_unregister(data
->hwmon_dev
);
887 sysfs_remove_group(&client
->dev
.kobj
, &lm87_group
);
888 sysfs_remove_group(&client
->dev
.kobj
, &lm87_group_opt
);
890 if ((err
= i2c_detach_client(client
)))
897 static struct lm87_data
*lm87_update_device(struct device
*dev
)
899 struct i2c_client
*client
= to_i2c_client(dev
);
900 struct lm87_data
*data
= i2c_get_clientdata(client
);
902 mutex_lock(&data
->update_lock
);
904 if (time_after(jiffies
, data
->last_updated
+ HZ
) || !data
->valid
) {
907 dev_dbg(&client
->dev
, "Updating data.\n");
909 i
= (data
->channel
& CHAN_TEMP3
) ? 1 : 0;
910 j
= (data
->channel
& CHAN_TEMP3
) ? 5 : 6;
912 data
->in
[i
] = lm87_read_value(client
,
914 data
->in_min
[i
] = lm87_read_value(client
,
916 data
->in_max
[i
] = lm87_read_value(client
,
920 for (i
= 0; i
< 2; i
++) {
921 if (data
->channel
& CHAN_NO_FAN(i
)) {
922 data
->in
[6+i
] = lm87_read_value(client
,
924 data
->in_max
[6+i
] = lm87_read_value(client
,
925 LM87_REG_AIN_MAX(i
));
926 data
->in_min
[6+i
] = lm87_read_value(client
,
927 LM87_REG_AIN_MIN(i
));
930 data
->fan
[i
] = lm87_read_value(client
,
932 data
->fan_min
[i
] = lm87_read_value(client
,
933 LM87_REG_FAN_MIN(i
));
937 j
= (data
->channel
& CHAN_TEMP3
) ? 3 : 2;
938 for (i
= 0 ; i
< j
; i
++) {
939 data
->temp
[i
] = lm87_read_value(client
,
941 data
->temp_high
[i
] = lm87_read_value(client
,
942 LM87_REG_TEMP_HIGH
[i
]);
943 data
->temp_low
[i
] = lm87_read_value(client
,
944 LM87_REG_TEMP_LOW
[i
]);
947 i
= lm87_read_value(client
, LM87_REG_TEMP_HW_INT_LOCK
);
948 j
= lm87_read_value(client
, LM87_REG_TEMP_HW_INT
);
949 data
->temp_crit_int
= min(i
, j
);
951 i
= lm87_read_value(client
, LM87_REG_TEMP_HW_EXT_LOCK
);
952 j
= lm87_read_value(client
, LM87_REG_TEMP_HW_EXT
);
953 data
->temp_crit_ext
= min(i
, j
);
955 i
= lm87_read_value(client
, LM87_REG_VID_FAN_DIV
);
956 data
->fan_div
[0] = (i
>> 4) & 0x03;
957 data
->fan_div
[1] = (i
>> 6) & 0x03;
958 data
->vid
= (i
& 0x0F)
959 | (lm87_read_value(client
, LM87_REG_VID4
) & 0x01)
962 data
->alarms
= lm87_read_value(client
, LM87_REG_ALARMS1
)
963 | (lm87_read_value(client
, LM87_REG_ALARMS2
)
965 data
->aout
= lm87_read_value(client
, LM87_REG_AOUT
);
967 data
->last_updated
= jiffies
;
971 mutex_unlock(&data
->update_lock
);
976 static int __init
sensors_lm87_init(void)
978 return i2c_add_driver(&lm87_driver
);
981 static void __exit
sensors_lm87_exit(void)
983 i2c_del_driver(&lm87_driver
);
986 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
987 MODULE_DESCRIPTION("LM87 driver");
988 MODULE_LICENSE("GPL");
990 module_init(sensors_lm87_init
);
991 module_exit(sensors_lm87_exit
);