2 * lm80.c - From lm_sensors, Linux kernel modules for hardware
4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5 * and Philip Edelbrock <phil@netroedge.com>
7 * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/jiffies.h>
28 #include <linux/i2c.h>
29 #include <linux/i2c-sensor.h>
30 #include <linux/hwmon.h>
31 #include <linux/err.h>
33 /* Addresses to scan */
34 static unsigned short normal_i2c
[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c,
35 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
};
36 static unsigned int normal_isa
[] = { I2C_CLIENT_ISA_END
};
38 /* Insmod parameters */
39 SENSORS_INSMOD_1(lm80
);
41 /* Many LM80 constants specified below */
43 /* The LM80 registers */
44 #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
45 #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
46 #define LM80_REG_IN(nr) (0x20 + (nr))
48 #define LM80_REG_FAN1 0x28
49 #define LM80_REG_FAN2 0x29
50 #define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
52 #define LM80_REG_TEMP 0x27
53 #define LM80_REG_TEMP_HOT_MAX 0x38
54 #define LM80_REG_TEMP_HOT_HYST 0x39
55 #define LM80_REG_TEMP_OS_MAX 0x3a
56 #define LM80_REG_TEMP_OS_HYST 0x3b
58 #define LM80_REG_CONFIG 0x00
59 #define LM80_REG_ALARM1 0x01
60 #define LM80_REG_ALARM2 0x02
61 #define LM80_REG_MASK1 0x03
62 #define LM80_REG_MASK2 0x04
63 #define LM80_REG_FANDIV 0x05
64 #define LM80_REG_RES 0x06
67 /* Conversions. Rounding and limit checking is only done on the TO_REG
68 variants. Note that you should be a bit careful with which arguments
69 these macros are called: arguments may be evaluated more than once.
70 Fixing this is just not worth it. */
72 #define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
73 #define IN_FROM_REG(val) ((val)*10)
75 static inline unsigned char FAN_TO_REG(unsigned rpm
, unsigned div
)
79 rpm
= SENSORS_LIMIT(rpm
, 1, 1000000);
80 return SENSORS_LIMIT((1350000 + rpm
*div
/ 2) / (rpm
*div
), 1, 254);
83 #define FAN_FROM_REG(val,div) ((val)==0?-1:\
84 (val)==255?0:1350000/((div)*(val)))
86 static inline long TEMP_FROM_REG(u16 temp
)
92 res
= 625 * (long) temp
;
94 res
= ((long) temp
- 0x01000) * 625;
99 #define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
101 #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
102 ((val)-500)/1000:((val)+500)/1000,0,255)
104 #define DIV_FROM_REG(val) (1 << (val))
107 * Client data (each client gets its own)
111 struct i2c_client client
;
112 struct class_device
*class_dev
;
113 struct semaphore update_lock
;
114 char valid
; /* !=0 if following fields are valid */
115 unsigned long last_updated
; /* In jiffies */
117 u8 in
[7]; /* Register value */
118 u8 in_max
[7]; /* Register value */
119 u8 in_min
[7]; /* Register value */
120 u8 fan
[2]; /* Register value */
121 u8 fan_min
[2]; /* Register value */
122 u8 fan_div
[2]; /* Register encoding, shifted right */
123 u16 temp
; /* Register values, shifted right */
124 u8 temp_hot_max
; /* Register value */
125 u8 temp_hot_hyst
; /* Register value */
126 u8 temp_os_max
; /* Register value */
127 u8 temp_os_hyst
; /* Register value */
128 u16 alarms
; /* Register encoding, combined */
132 * Functions declaration
135 static int lm80_attach_adapter(struct i2c_adapter
*adapter
);
136 static int lm80_detect(struct i2c_adapter
*adapter
, int address
, int kind
);
137 static void lm80_init_client(struct i2c_client
*client
);
138 static int lm80_detach_client(struct i2c_client
*client
);
139 static struct lm80_data
*lm80_update_device(struct device
*dev
);
140 static int lm80_read_value(struct i2c_client
*client
, u8 reg
);
141 static int lm80_write_value(struct i2c_client
*client
, u8 reg
, u8 value
);
144 * Driver data (common to all clients)
147 static struct i2c_driver lm80_driver
= {
148 .owner
= THIS_MODULE
,
150 .id
= I2C_DRIVERID_LM80
,
151 .flags
= I2C_DF_NOTIFY
,
152 .attach_adapter
= lm80_attach_adapter
,
153 .detach_client
= lm80_detach_client
,
160 #define show_in(suffix, value) \
161 static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
163 struct lm80_data *data = lm80_update_device(dev); \
164 return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \
166 show_in(min0
, in_min
[0]);
167 show_in(min1
, in_min
[1]);
168 show_in(min2
, in_min
[2]);
169 show_in(min3
, in_min
[3]);
170 show_in(min4
, in_min
[4]);
171 show_in(min5
, in_min
[5]);
172 show_in(min6
, in_min
[6]);
173 show_in(max0
, in_max
[0]);
174 show_in(max1
, in_max
[1]);
175 show_in(max2
, in_max
[2]);
176 show_in(max3
, in_max
[3]);
177 show_in(max4
, in_max
[4]);
178 show_in(max5
, in_max
[5]);
179 show_in(max6
, in_max
[6]);
180 show_in(input0
, in
[0]);
181 show_in(input1
, in
[1]);
182 show_in(input2
, in
[2]);
183 show_in(input3
, in
[3]);
184 show_in(input4
, in
[4]);
185 show_in(input5
, in
[5]);
186 show_in(input6
, in
[6]);
188 #define set_in(suffix, value, reg) \
189 static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
192 struct i2c_client *client = to_i2c_client(dev); \
193 struct lm80_data *data = i2c_get_clientdata(client); \
194 long val = simple_strtol(buf, NULL, 10); \
196 down(&data->update_lock);\
197 data->value = IN_TO_REG(val); \
198 lm80_write_value(client, reg, data->value); \
199 up(&data->update_lock);\
202 set_in(min0
, in_min
[0], LM80_REG_IN_MIN(0));
203 set_in(min1
, in_min
[1], LM80_REG_IN_MIN(1));
204 set_in(min2
, in_min
[2], LM80_REG_IN_MIN(2));
205 set_in(min3
, in_min
[3], LM80_REG_IN_MIN(3));
206 set_in(min4
, in_min
[4], LM80_REG_IN_MIN(4));
207 set_in(min5
, in_min
[5], LM80_REG_IN_MIN(5));
208 set_in(min6
, in_min
[6], LM80_REG_IN_MIN(6));
209 set_in(max0
, in_max
[0], LM80_REG_IN_MAX(0));
210 set_in(max1
, in_max
[1], LM80_REG_IN_MAX(1));
211 set_in(max2
, in_max
[2], LM80_REG_IN_MAX(2));
212 set_in(max3
, in_max
[3], LM80_REG_IN_MAX(3));
213 set_in(max4
, in_max
[4], LM80_REG_IN_MAX(4));
214 set_in(max5
, in_max
[5], LM80_REG_IN_MAX(5));
215 set_in(max6
, in_max
[6], LM80_REG_IN_MAX(6));
217 #define show_fan(suffix, value, div) \
218 static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
220 struct lm80_data *data = lm80_update_device(dev); \
221 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \
222 DIV_FROM_REG(data->div))); \
224 show_fan(min1
, fan_min
[0], fan_div
[0]);
225 show_fan(min2
, fan_min
[1], fan_div
[1]);
226 show_fan(input1
, fan
[0], fan_div
[0]);
227 show_fan(input2
, fan
[1], fan_div
[1]);
229 #define show_fan_div(suffix, value) \
230 static ssize_t show_fan_div##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
232 struct lm80_data *data = lm80_update_device(dev); \
233 return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \
235 show_fan_div(1, fan_div
[0]);
236 show_fan_div(2, fan_div
[1]);
238 #define set_fan(suffix, value, reg, div) \
239 static ssize_t set_fan_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
242 struct i2c_client *client = to_i2c_client(dev); \
243 struct lm80_data *data = i2c_get_clientdata(client); \
244 long val = simple_strtoul(buf, NULL, 10); \
246 down(&data->update_lock);\
247 data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \
248 lm80_write_value(client, reg, data->value); \
249 up(&data->update_lock);\
252 set_fan(min1
, fan_min
[0], LM80_REG_FAN_MIN(1), fan_div
[0]);
253 set_fan(min2
, fan_min
[1], LM80_REG_FAN_MIN(2), fan_div
[1]);
255 /* Note: we save and restore the fan minimum here, because its value is
256 determined in part by the fan divisor. This follows the principle of
257 least suprise; the user doesn't expect the fan minimum to change just
258 because the divisor changed. */
259 static ssize_t
set_fan_div(struct device
*dev
, const char *buf
,
260 size_t count
, int nr
)
262 struct i2c_client
*client
= to_i2c_client(dev
);
263 struct lm80_data
*data
= i2c_get_clientdata(client
);
264 unsigned long min
, val
= simple_strtoul(buf
, NULL
, 10);
268 down(&data
->update_lock
);
269 min
= FAN_FROM_REG(data
->fan_min
[nr
],
270 DIV_FROM_REG(data
->fan_div
[nr
]));
273 case 1: data
->fan_div
[nr
] = 0; break;
274 case 2: data
->fan_div
[nr
] = 1; break;
275 case 4: data
->fan_div
[nr
] = 2; break;
276 case 8: data
->fan_div
[nr
] = 3; break;
278 dev_err(&client
->dev
, "fan_div value %ld not "
279 "supported. Choose one of 1, 2, 4 or 8!\n", val
);
280 up(&data
->update_lock
);
284 reg
= (lm80_read_value(client
, LM80_REG_FANDIV
) & ~(3 << (2 * (nr
+ 1))))
285 | (data
->fan_div
[nr
] << (2 * (nr
+ 1)));
286 lm80_write_value(client
, LM80_REG_FANDIV
, reg
);
288 /* Restore fan_min */
289 data
->fan_min
[nr
] = FAN_TO_REG(min
, DIV_FROM_REG(data
->fan_div
[nr
]));
290 lm80_write_value(client
, LM80_REG_FAN_MIN(nr
+ 1), data
->fan_min
[nr
]);
291 up(&data
->update_lock
);
296 #define set_fan_div(number) \
297 static ssize_t set_fan_div##number(struct device *dev, struct device_attribute *attr, const char *buf, \
300 return set_fan_div(dev, buf, count, number - 1); \
305 static ssize_t
show_temp_input1(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
307 struct lm80_data
*data
= lm80_update_device(dev
);
308 return sprintf(buf
, "%ld\n", TEMP_FROM_REG(data
->temp
));
311 #define show_temp(suffix, value) \
312 static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
314 struct lm80_data *data = lm80_update_device(dev); \
315 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
317 show_temp(hot_max
, temp_hot_max
);
318 show_temp(hot_hyst
, temp_hot_hyst
);
319 show_temp(os_max
, temp_os_max
);
320 show_temp(os_hyst
, temp_os_hyst
);
322 #define set_temp(suffix, value, reg) \
323 static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
326 struct i2c_client *client = to_i2c_client(dev); \
327 struct lm80_data *data = i2c_get_clientdata(client); \
328 long val = simple_strtoul(buf, NULL, 10); \
330 down(&data->update_lock); \
331 data->value = TEMP_LIMIT_TO_REG(val); \
332 lm80_write_value(client, reg, data->value); \
333 up(&data->update_lock); \
336 set_temp(hot_max
, temp_hot_max
, LM80_REG_TEMP_HOT_MAX
);
337 set_temp(hot_hyst
, temp_hot_hyst
, LM80_REG_TEMP_HOT_HYST
);
338 set_temp(os_max
, temp_os_max
, LM80_REG_TEMP_OS_MAX
);
339 set_temp(os_hyst
, temp_os_hyst
, LM80_REG_TEMP_OS_HYST
);
341 static ssize_t
show_alarms(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
343 struct lm80_data
*data
= lm80_update_device(dev
);
344 return sprintf(buf
, "%u\n", data
->alarms
);
347 static DEVICE_ATTR(in0_min
, S_IWUSR
| S_IRUGO
, show_in_min0
, set_in_min0
);
348 static DEVICE_ATTR(in1_min
, S_IWUSR
| S_IRUGO
, show_in_min1
, set_in_min1
);
349 static DEVICE_ATTR(in2_min
, S_IWUSR
| S_IRUGO
, show_in_min2
, set_in_min2
);
350 static DEVICE_ATTR(in3_min
, S_IWUSR
| S_IRUGO
, show_in_min3
, set_in_min3
);
351 static DEVICE_ATTR(in4_min
, S_IWUSR
| S_IRUGO
, show_in_min4
, set_in_min4
);
352 static DEVICE_ATTR(in5_min
, S_IWUSR
| S_IRUGO
, show_in_min5
, set_in_min5
);
353 static DEVICE_ATTR(in6_min
, S_IWUSR
| S_IRUGO
, show_in_min6
, set_in_min6
);
354 static DEVICE_ATTR(in0_max
, S_IWUSR
| S_IRUGO
, show_in_max0
, set_in_max0
);
355 static DEVICE_ATTR(in1_max
, S_IWUSR
| S_IRUGO
, show_in_max1
, set_in_max1
);
356 static DEVICE_ATTR(in2_max
, S_IWUSR
| S_IRUGO
, show_in_max2
, set_in_max2
);
357 static DEVICE_ATTR(in3_max
, S_IWUSR
| S_IRUGO
, show_in_max3
, set_in_max3
);
358 static DEVICE_ATTR(in4_max
, S_IWUSR
| S_IRUGO
, show_in_max4
, set_in_max4
);
359 static DEVICE_ATTR(in5_max
, S_IWUSR
| S_IRUGO
, show_in_max5
, set_in_max5
);
360 static DEVICE_ATTR(in6_max
, S_IWUSR
| S_IRUGO
, show_in_max6
, set_in_max6
);
361 static DEVICE_ATTR(in0_input
, S_IRUGO
, show_in_input0
, NULL
);
362 static DEVICE_ATTR(in1_input
, S_IRUGO
, show_in_input1
, NULL
);
363 static DEVICE_ATTR(in2_input
, S_IRUGO
, show_in_input2
, NULL
);
364 static DEVICE_ATTR(in3_input
, S_IRUGO
, show_in_input3
, NULL
);
365 static DEVICE_ATTR(in4_input
, S_IRUGO
, show_in_input4
, NULL
);
366 static DEVICE_ATTR(in5_input
, S_IRUGO
, show_in_input5
, NULL
);
367 static DEVICE_ATTR(in6_input
, S_IRUGO
, show_in_input6
, NULL
);
368 static DEVICE_ATTR(fan1_min
, S_IWUSR
| S_IRUGO
, show_fan_min1
,
370 static DEVICE_ATTR(fan2_min
, S_IWUSR
| S_IRUGO
, show_fan_min2
,
372 static DEVICE_ATTR(fan1_input
, S_IRUGO
, show_fan_input1
, NULL
);
373 static DEVICE_ATTR(fan2_input
, S_IRUGO
, show_fan_input2
, NULL
);
374 static DEVICE_ATTR(fan1_div
, S_IWUSR
| S_IRUGO
, show_fan_div1
, set_fan_div1
);
375 static DEVICE_ATTR(fan2_div
, S_IWUSR
| S_IRUGO
, show_fan_div2
, set_fan_div2
);
376 static DEVICE_ATTR(temp1_input
, S_IRUGO
, show_temp_input1
, NULL
);
377 static DEVICE_ATTR(temp1_max
, S_IWUSR
| S_IRUGO
, show_temp_hot_max
,
379 static DEVICE_ATTR(temp1_max_hyst
, S_IWUSR
| S_IRUGO
, show_temp_hot_hyst
,
381 static DEVICE_ATTR(temp1_crit
, S_IWUSR
| S_IRUGO
, show_temp_os_max
,
383 static DEVICE_ATTR(temp1_crit_hyst
, S_IWUSR
| S_IRUGO
, show_temp_os_hyst
,
385 static DEVICE_ATTR(alarms
, S_IRUGO
, show_alarms
, NULL
);
391 static int lm80_attach_adapter(struct i2c_adapter
*adapter
)
393 if (!(adapter
->class & I2C_CLASS_HWMON
))
395 return i2c_detect(adapter
, &addr_data
, lm80_detect
);
398 int lm80_detect(struct i2c_adapter
*adapter
, int address
, int kind
)
401 struct i2c_client
*new_client
;
402 struct lm80_data
*data
;
406 if (!i2c_check_functionality(adapter
, I2C_FUNC_SMBUS_BYTE_DATA
))
409 /* OK. For now, we presume we have a valid client. We now create the
410 client structure, even though we cannot fill it completely yet.
411 But it allows us to access lm80_{read,write}_value. */
412 if (!(data
= kmalloc(sizeof(struct lm80_data
), GFP_KERNEL
))) {
416 memset(data
, 0, sizeof(struct lm80_data
));
418 new_client
= &data
->client
;
419 i2c_set_clientdata(new_client
, data
);
420 new_client
->addr
= address
;
421 new_client
->adapter
= adapter
;
422 new_client
->driver
= &lm80_driver
;
423 new_client
->flags
= 0;
425 /* Now, we do the remaining detection. It is lousy. */
426 if (lm80_read_value(new_client
, LM80_REG_ALARM2
) & 0xc0)
428 for (i
= 0x2a; i
<= 0x3d; i
++) {
429 cur
= i2c_smbus_read_byte_data(new_client
, i
);
430 if ((i2c_smbus_read_byte_data(new_client
, i
+ 0x40) != cur
)
431 || (i2c_smbus_read_byte_data(new_client
, i
+ 0x80) != cur
)
432 || (i2c_smbus_read_byte_data(new_client
, i
+ 0xc0) != cur
))
436 /* Determine the chip type - only one kind supported! */
440 /* Fill in the remaining client fields and put it into the global list */
441 strlcpy(new_client
->name
, name
, I2C_NAME_SIZE
);
443 init_MUTEX(&data
->update_lock
);
445 /* Tell the I2C layer a new client has arrived */
446 if ((err
= i2c_attach_client(new_client
)))
449 /* Initialize the LM80 chip */
450 lm80_init_client(new_client
);
452 /* A few vars need to be filled upon startup */
453 data
->fan_min
[0] = lm80_read_value(new_client
, LM80_REG_FAN_MIN(1));
454 data
->fan_min
[1] = lm80_read_value(new_client
, LM80_REG_FAN_MIN(2));
456 /* Register sysfs hooks */
457 data
->class_dev
= hwmon_device_register(&new_client
->dev
);
458 if (IS_ERR(data
->class_dev
)) {
459 err
= PTR_ERR(data
->class_dev
);
463 device_create_file(&new_client
->dev
, &dev_attr_in0_min
);
464 device_create_file(&new_client
->dev
, &dev_attr_in1_min
);
465 device_create_file(&new_client
->dev
, &dev_attr_in2_min
);
466 device_create_file(&new_client
->dev
, &dev_attr_in3_min
);
467 device_create_file(&new_client
->dev
, &dev_attr_in4_min
);
468 device_create_file(&new_client
->dev
, &dev_attr_in5_min
);
469 device_create_file(&new_client
->dev
, &dev_attr_in6_min
);
470 device_create_file(&new_client
->dev
, &dev_attr_in0_max
);
471 device_create_file(&new_client
->dev
, &dev_attr_in1_max
);
472 device_create_file(&new_client
->dev
, &dev_attr_in2_max
);
473 device_create_file(&new_client
->dev
, &dev_attr_in3_max
);
474 device_create_file(&new_client
->dev
, &dev_attr_in4_max
);
475 device_create_file(&new_client
->dev
, &dev_attr_in5_max
);
476 device_create_file(&new_client
->dev
, &dev_attr_in6_max
);
477 device_create_file(&new_client
->dev
, &dev_attr_in0_input
);
478 device_create_file(&new_client
->dev
, &dev_attr_in1_input
);
479 device_create_file(&new_client
->dev
, &dev_attr_in2_input
);
480 device_create_file(&new_client
->dev
, &dev_attr_in3_input
);
481 device_create_file(&new_client
->dev
, &dev_attr_in4_input
);
482 device_create_file(&new_client
->dev
, &dev_attr_in5_input
);
483 device_create_file(&new_client
->dev
, &dev_attr_in6_input
);
484 device_create_file(&new_client
->dev
, &dev_attr_fan1_min
);
485 device_create_file(&new_client
->dev
, &dev_attr_fan2_min
);
486 device_create_file(&new_client
->dev
, &dev_attr_fan1_input
);
487 device_create_file(&new_client
->dev
, &dev_attr_fan2_input
);
488 device_create_file(&new_client
->dev
, &dev_attr_fan1_div
);
489 device_create_file(&new_client
->dev
, &dev_attr_fan2_div
);
490 device_create_file(&new_client
->dev
, &dev_attr_temp1_input
);
491 device_create_file(&new_client
->dev
, &dev_attr_temp1_max
);
492 device_create_file(&new_client
->dev
, &dev_attr_temp1_max_hyst
);
493 device_create_file(&new_client
->dev
, &dev_attr_temp1_crit
);
494 device_create_file(&new_client
->dev
, &dev_attr_temp1_crit_hyst
);
495 device_create_file(&new_client
->dev
, &dev_attr_alarms
);
500 i2c_detach_client(new_client
);
507 static int lm80_detach_client(struct i2c_client
*client
)
509 struct lm80_data
*data
= i2c_get_clientdata(client
);
512 hwmon_device_unregister(data
->class_dev
);
514 if ((err
= i2c_detach_client(client
))) {
515 dev_err(&client
->dev
, "Client deregistration failed, "
516 "client not detached.\n");
524 static int lm80_read_value(struct i2c_client
*client
, u8 reg
)
526 return i2c_smbus_read_byte_data(client
, reg
);
529 static int lm80_write_value(struct i2c_client
*client
, u8 reg
, u8 value
)
531 return i2c_smbus_write_byte_data(client
, reg
, value
);
534 /* Called when we have found a new LM80. */
535 static void lm80_init_client(struct i2c_client
*client
)
537 /* Reset all except Watchdog values and last conversion values
538 This sets fan-divs to 2, among others. This makes most other
539 initializations unnecessary */
540 lm80_write_value(client
, LM80_REG_CONFIG
, 0x80);
541 /* Set 11-bit temperature resolution */
542 lm80_write_value(client
, LM80_REG_RES
, 0x08);
544 /* Start monitoring */
545 lm80_write_value(client
, LM80_REG_CONFIG
, 0x01);
548 static struct lm80_data
*lm80_update_device(struct device
*dev
)
550 struct i2c_client
*client
= to_i2c_client(dev
);
551 struct lm80_data
*data
= i2c_get_clientdata(client
);
554 down(&data
->update_lock
);
556 if (time_after(jiffies
, data
->last_updated
+ 2 * HZ
) || !data
->valid
) {
557 dev_dbg(&client
->dev
, "Starting lm80 update\n");
558 for (i
= 0; i
<= 6; i
++) {
560 lm80_read_value(client
, LM80_REG_IN(i
));
562 lm80_read_value(client
, LM80_REG_IN_MIN(i
));
564 lm80_read_value(client
, LM80_REG_IN_MAX(i
));
566 data
->fan
[0] = lm80_read_value(client
, LM80_REG_FAN1
);
568 lm80_read_value(client
, LM80_REG_FAN_MIN(1));
569 data
->fan
[1] = lm80_read_value(client
, LM80_REG_FAN2
);
571 lm80_read_value(client
, LM80_REG_FAN_MIN(2));
574 (lm80_read_value(client
, LM80_REG_TEMP
) << 8) |
575 (lm80_read_value(client
, LM80_REG_RES
) & 0xf0);
577 lm80_read_value(client
, LM80_REG_TEMP_OS_MAX
);
579 lm80_read_value(client
, LM80_REG_TEMP_OS_HYST
);
581 lm80_read_value(client
, LM80_REG_TEMP_HOT_MAX
);
582 data
->temp_hot_hyst
=
583 lm80_read_value(client
, LM80_REG_TEMP_HOT_HYST
);
585 i
= lm80_read_value(client
, LM80_REG_FANDIV
);
586 data
->fan_div
[0] = (i
>> 2) & 0x03;
587 data
->fan_div
[1] = (i
>> 4) & 0x03;
588 data
->alarms
= lm80_read_value(client
, LM80_REG_ALARM1
) +
589 (lm80_read_value(client
, LM80_REG_ALARM2
) << 8);
590 data
->last_updated
= jiffies
;
594 up(&data
->update_lock
);
599 static int __init
sensors_lm80_init(void)
601 return i2c_add_driver(&lm80_driver
);
604 static void __exit
sensors_lm80_exit(void)
606 i2c_del_driver(&lm80_driver
);
609 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
610 "Philip Edelbrock <phil@netroedge.com>");
611 MODULE_DESCRIPTION("LM80 driver");
612 MODULE_LICENSE("GPL");
614 module_init(sensors_lm80_init
);
615 module_exit(sensors_lm80_exit
);
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