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 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 program is free software; you can redistribute it and/or modify
41 * it under the terms of the GNU General Public License as published by
42 * the Free Software Foundation; either version 2 of the License, or
43 * (at your option) any later version.
45 * This program is distributed in the hope that it will be useful,
46 * but WITHOUT ANY WARRANTY; without even the implied warranty of
47 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
48 * GNU General Public License for more details.
50 * You should have received a copy of the GNU General Public License
51 * along with this program; if not, write to the Free Software
52 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
55 #include <linux/config.h>
56 #include <linux/module.h>
57 #include <linux/init.h>
58 #include <linux/slab.h>
59 #include <linux/i2c.h>
60 #include <linux/i2c-sensor.h>
61 #include <linux/i2c-vid.h>
65 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
68 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
69 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
75 SENSORS_INSMOD_1(lm87);
82 #define LM87_REG_IN(nr) (0x20 + (nr))
83 #define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
84 #define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
86 #define LM87_REG_AIN(nr) (0x28 + (nr))
87 #define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
88 #define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
90 static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
91 static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
92 static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
94 #define LM87_REG_TEMP_HW_INT_LOCK 0x13
95 #define LM87_REG_TEMP_HW_EXT_LOCK 0x14
96 #define LM87_REG_TEMP_HW_INT 0x17
97 #define LM87_REG_TEMP_HW_EXT 0x18
100 #define LM87_REG_FAN(nr) (0x28 + (nr))
101 #define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
102 #define LM87_REG_AOUT 0x19
104 #define LM87_REG_CONFIG 0x40
105 #define LM87_REG_CHANNEL_MODE 0x16
106 #define LM87_REG_VID_FAN_DIV 0x47
107 #define LM87_REG_VID4 0x49
109 #define LM87_REG_ALARMS1 0x41
110 #define LM87_REG_ALARMS2 0x42
112 #define LM87_REG_COMPANY_ID 0x3E
113 #define LM87_REG_REVISION 0x3F
116 * Conversions and various macros
117 * The LM87 uses signed 8-bit values for temperatures.
120 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
121 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
122 (val) * 192 >= (scale) * 255 ? 255 : \
123 ((val) * 192 + (scale)/2) / (scale))
125 #define TEMP_FROM_REG(reg) ((reg) * 1000)
126 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
127 (val) >= 126500 ? 127 : \
128 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
130 #define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \
131 1350000 + (reg)*(div) / 2) / ((reg)*(div))
132 #define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \
133 (1350000 + (val)*(div) / 2) / ((val)*(div)))
135 #define FAN_DIV_FROM_REG(reg) (1 << (reg))
137 /* analog out is 9.80mV/LSB */
138 #define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
139 #define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
140 (val) >= 2500 ? 255 : \
141 ((val) * 10 + 49) / 98)
144 #define CHAN_NO_FAN(nr) (1 << (nr))
145 #define CHAN_TEMP3 (1 << 2)
146 #define CHAN_VCC_5V (1 << 3)
147 #define CHAN_NO_VID (1 << 8)
150 * Functions declaration
153 static int lm87_attach_adapter(struct i2c_adapter *adapter);
154 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind);
155 static void lm87_init_client(struct i2c_client *client);
156 static int lm87_detach_client(struct i2c_client *client);
157 static struct lm87_data *lm87_update_device(struct device *dev);
160 * Driver data (common to all clients)
163 static struct i2c_driver lm87_driver = {
164 .owner = THIS_MODULE,
166 .id = I2C_DRIVERID_LM87,
167 .flags = I2C_DF_NOTIFY,
168 .attach_adapter = lm87_attach_adapter,
169 .detach_client = lm87_detach_client,
173 * Client data (each client gets its own)
177 struct i2c_client client;
178 struct semaphore update_lock;
179 char valid; /* zero until following fields are valid */
180 unsigned long last_updated; /* In jiffies */
182 u8 channel; /* register value */
184 u8 in[8]; /* register value */
185 u8 in_max[8]; /* register value */
186 u8 in_min[8]; /* register value */
189 s8 temp[3]; /* register value */
190 s8 temp_high[3]; /* register value */
191 s8 temp_low[3]; /* register value */
192 s8 temp_crit_int; /* min of two register values */
193 s8 temp_crit_ext; /* min of two register values */
195 u8 fan[2]; /* register value */
196 u8 fan_min[2]; /* register value */
197 u8 fan_div[2]; /* register value, shifted right */
198 u8 aout; /* register value */
200 u16 alarms; /* register values, combined */
201 u8 vid; /* register values, combined */
215 static inline int lm87_read_value(struct i2c_client *client, u8 reg)
217 return i2c_smbus_read_byte_data(client, reg);
220 static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
222 return i2c_smbus_write_byte_data(client, reg, value);
225 #define show_in(offset) \
226 static ssize_t show_in##offset##_input(struct device *dev, char *buf) \
228 struct lm87_data *data = lm87_update_device(dev); \
229 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
230 data->in_scale[offset])); \
232 static ssize_t show_in##offset##_min(struct device *dev, char *buf) \
234 struct lm87_data *data = lm87_update_device(dev); \
235 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
236 data->in_scale[offset])); \
238 static ssize_t show_in##offset##_max(struct device *dev, char *buf) \
240 struct lm87_data *data = lm87_update_device(dev); \
241 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
242 data->in_scale[offset])); \
244 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
245 show_in##offset##_input, NULL);
255 static void set_in_min(struct device *dev, const char *buf, int nr)
257 struct i2c_client *client = to_i2c_client(dev);
258 struct lm87_data *data = i2c_get_clientdata(client);
259 long val = simple_strtol(buf, NULL, 10);
260 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
261 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) :
262 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]);
265 static void set_in_max(struct device *dev, const char *buf, int nr)
267 struct i2c_client *client = to_i2c_client(dev);
268 struct lm87_data *data = i2c_get_clientdata(client);
269 long val = simple_strtol(buf, NULL, 10);
270 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
271 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) :
272 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]);
275 #define set_in(offset) \
276 static ssize_t set_in##offset##_min(struct device *dev, \
277 const char *buf, size_t count) \
279 set_in_min(dev, buf, offset); \
282 static ssize_t set_in##offset##_max(struct device *dev, \
283 const char *buf, size_t count) \
285 set_in_max(dev, buf, offset); \
288 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
289 show_in##offset##_min, set_in##offset##_min); \
290 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
291 show_in##offset##_max, set_in##offset##_max);
301 #define show_temp(offset) \
302 static ssize_t show_temp##offset##_input(struct device *dev, char *buf) \
304 struct lm87_data *data = lm87_update_device(dev); \
305 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
307 static ssize_t show_temp##offset##_low(struct device *dev, char *buf) \
309 struct lm87_data *data = lm87_update_device(dev); \
310 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
312 static ssize_t show_temp##offset##_high(struct device *dev, char *buf) \
314 struct lm87_data *data = lm87_update_device(dev); \
315 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
317 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
318 show_temp##offset##_input, NULL);
323 static void set_temp_low(struct device *dev, const char *buf, int nr)
325 struct i2c_client *client = to_i2c_client(dev);
326 struct lm87_data *data = i2c_get_clientdata(client);
327 long val = simple_strtol(buf, NULL, 10);
328 data->temp_low[nr] = TEMP_TO_REG(val);
329 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
332 static void set_temp_high(struct device *dev, const char *buf, int nr)
334 struct i2c_client *client = to_i2c_client(dev);
335 struct lm87_data *data = i2c_get_clientdata(client);
336 long val = simple_strtol(buf, NULL, 10);
337 data->temp_high[nr] = TEMP_TO_REG(val);
338 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
341 #define set_temp(offset) \
342 static ssize_t set_temp##offset##_low(struct device *dev, \
343 const char *buf, size_t count) \
345 set_temp_low(dev, buf, offset-1); \
348 static ssize_t set_temp##offset##_high(struct device *dev, \
349 const char *buf, size_t count) \
351 set_temp_high(dev, buf, offset-1); \
354 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
355 show_temp##offset##_high, set_temp##offset##_high); \
356 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
357 show_temp##offset##_low, set_temp##offset##_low);
362 static ssize_t show_temp_crit_int(struct device *dev, char *buf)
364 struct lm87_data *data = lm87_update_device(dev);
365 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
368 static ssize_t show_temp_crit_ext(struct device *dev, char *buf)
370 struct lm87_data *data = lm87_update_device(dev);
371 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
374 static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
375 static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
376 static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
378 #define show_fan(offset) \
379 static ssize_t show_fan##offset##_input(struct device *dev, char *buf) \
381 struct lm87_data *data = lm87_update_device(dev); \
382 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
383 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
385 static ssize_t show_fan##offset##_min(struct device *dev, char *buf) \
387 struct lm87_data *data = lm87_update_device(dev); \
388 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
389 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
391 static ssize_t show_fan##offset##_div(struct device *dev, char *buf) \
393 struct lm87_data *data = lm87_update_device(dev); \
394 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
396 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
397 show_fan##offset##_input, NULL);
401 static void set_fan_min(struct device *dev, const char *buf, int nr)
403 struct i2c_client *client = to_i2c_client(dev);
404 struct lm87_data *data = i2c_get_clientdata(client);
405 long val = simple_strtol(buf, NULL, 10);
406 data->fan_min[nr] = FAN_TO_REG(val,
407 FAN_DIV_FROM_REG(data->fan_div[nr]));
408 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
411 /* Note: we save and restore the fan minimum here, because its value is
412 determined in part by the fan clock divider. This follows the principle
413 of least suprise; the user doesn't expect the fan minimum to change just
414 because the divider changed. */
415 static ssize_t set_fan_div(struct device *dev, const char *buf,
416 size_t count, int nr)
418 struct i2c_client *client = to_i2c_client(dev);
419 struct lm87_data *data = i2c_get_clientdata(client);
420 long val = simple_strtol(buf, NULL, 10);
421 unsigned long min = FAN_FROM_REG(data->fan_min[nr],
422 FAN_DIV_FROM_REG(data->fan_div[nr]));
426 case 1: data->fan_div[nr] = 0; break;
427 case 2: data->fan_div[nr] = 1; break;
428 case 4: data->fan_div[nr] = 2; break;
429 case 8: data->fan_div[nr] = 3; break;
430 default: return -EINVAL;
433 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
436 reg = (reg & 0xCF) | (data->fan_div[0] << 4);
439 reg = (reg & 0x3F) | (data->fan_div[1] << 6);
442 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
444 data->fan_min[nr] = FAN_TO_REG(min, val);
445 lm87_write_value(client, LM87_REG_FAN_MIN(nr),
450 #define set_fan(offset) \
451 static ssize_t set_fan##offset##_min(struct device *dev, const char *buf, \
454 set_fan_min(dev, buf, offset-1); \
457 static ssize_t set_fan##offset##_div(struct device *dev, const char *buf, \
460 return set_fan_div(dev, buf, count, offset-1); \
462 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
463 show_fan##offset##_min, set_fan##offset##_min); \
464 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
465 show_fan##offset##_div, set_fan##offset##_div);
469 static ssize_t show_alarms(struct device *dev, char *buf)
471 struct lm87_data *data = lm87_update_device(dev);
472 return sprintf(buf, "%d\n", data->alarms);
474 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
476 static ssize_t show_vid(struct device *dev, char *buf)
478 struct lm87_data *data = lm87_update_device(dev);
479 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
481 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
483 static ssize_t show_vrm(struct device *dev, char *buf)
485 struct lm87_data *data = lm87_update_device(dev);
486 return sprintf(buf, "%d\n", data->vrm);
488 static ssize_t set_vrm(struct device *dev, const char *buf, size_t count)
490 struct i2c_client *client = to_i2c_client(dev);
491 struct lm87_data *data = i2c_get_clientdata(client);
492 data->vrm = simple_strtoul(buf, NULL, 10);
495 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
497 static ssize_t show_aout(struct device *dev, char *buf)
499 struct lm87_data *data = lm87_update_device(dev);
500 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
502 static ssize_t set_aout(struct device *dev, const char *buf, size_t count)
504 struct i2c_client *client = to_i2c_client(dev);
505 struct lm87_data *data = i2c_get_clientdata(client);
506 long val = simple_strtol(buf, NULL, 10);
507 data->aout = AOUT_TO_REG(val);
508 lm87_write_value(client, LM87_REG_AOUT, data->aout);
511 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
517 static int lm87_attach_adapter(struct i2c_adapter *adapter)
519 if (!(adapter->class & I2C_CLASS_HWMON))
521 return i2c_detect(adapter, &addr_data, lm87_detect);
525 * The following function does more than just detection. If detection
526 * succeeds, it also registers the new chip.
528 static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
530 struct i2c_client *new_client;
531 struct lm87_data *data;
534 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
537 if (!(data = kmalloc(sizeof(struct lm87_data), GFP_KERNEL))) {
541 memset(data, 0, sizeof(struct lm87_data));
543 /* The common I2C client data is placed right before the
544 LM87-specific data. */
545 new_client = &data->client;
546 i2c_set_clientdata(new_client, data);
547 new_client->addr = address;
548 new_client->adapter = adapter;
549 new_client->driver = &lm87_driver;
550 new_client->flags = 0;
552 /* Default to an LM87 if forced */
556 /* Now, we do the remaining detection. */
558 u8 rev = lm87_read_value(new_client, LM87_REG_REVISION);
560 if (rev < 0x01 || rev > 0x08
561 || (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)
562 || lm87_read_value(new_client, LM87_REG_COMPANY_ID) != 0x02) {
563 dev_dbg(&adapter->dev,
564 "LM87 detection failed at 0x%02x.\n",
570 /* We can fill in the remaining client fields */
571 strlcpy(new_client->name, "lm87", I2C_NAME_SIZE);
572 new_client->id = lm87_id++;
574 init_MUTEX(&data->update_lock);
576 /* Tell the I2C layer a new client has arrived */
577 if ((err = i2c_attach_client(new_client)))
580 /* Initialize the LM87 chip */
581 lm87_init_client(new_client);
583 data->in_scale[0] = 2500;
584 data->in_scale[1] = 2700;
585 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
586 data->in_scale[3] = 5000;
587 data->in_scale[4] = 12000;
588 data->in_scale[5] = 2700;
589 data->in_scale[6] = 1875;
590 data->in_scale[7] = 1875;
592 /* Register sysfs hooks */
593 device_create_file(&new_client->dev, &dev_attr_in1_input);
594 device_create_file(&new_client->dev, &dev_attr_in1_min);
595 device_create_file(&new_client->dev, &dev_attr_in1_max);
596 device_create_file(&new_client->dev, &dev_attr_in2_input);
597 device_create_file(&new_client->dev, &dev_attr_in2_min);
598 device_create_file(&new_client->dev, &dev_attr_in2_max);
599 device_create_file(&new_client->dev, &dev_attr_in3_input);
600 device_create_file(&new_client->dev, &dev_attr_in3_min);
601 device_create_file(&new_client->dev, &dev_attr_in3_max);
602 device_create_file(&new_client->dev, &dev_attr_in4_input);
603 device_create_file(&new_client->dev, &dev_attr_in4_min);
604 device_create_file(&new_client->dev, &dev_attr_in4_max);
606 if (data->channel & CHAN_NO_FAN(0)) {
607 device_create_file(&new_client->dev, &dev_attr_in6_input);
608 device_create_file(&new_client->dev, &dev_attr_in6_min);
609 device_create_file(&new_client->dev, &dev_attr_in6_max);
611 device_create_file(&new_client->dev, &dev_attr_fan1_input);
612 device_create_file(&new_client->dev, &dev_attr_fan1_min);
613 device_create_file(&new_client->dev, &dev_attr_fan1_div);
615 if (data->channel & CHAN_NO_FAN(1)) {
616 device_create_file(&new_client->dev, &dev_attr_in7_input);
617 device_create_file(&new_client->dev, &dev_attr_in7_min);
618 device_create_file(&new_client->dev, &dev_attr_in7_max);
620 device_create_file(&new_client->dev, &dev_attr_fan2_input);
621 device_create_file(&new_client->dev, &dev_attr_fan2_min);
622 device_create_file(&new_client->dev, &dev_attr_fan2_div);
625 device_create_file(&new_client->dev, &dev_attr_temp1_input);
626 device_create_file(&new_client->dev, &dev_attr_temp1_max);
627 device_create_file(&new_client->dev, &dev_attr_temp1_min);
628 device_create_file(&new_client->dev, &dev_attr_temp1_crit);
629 device_create_file(&new_client->dev, &dev_attr_temp2_input);
630 device_create_file(&new_client->dev, &dev_attr_temp2_max);
631 device_create_file(&new_client->dev, &dev_attr_temp2_min);
632 device_create_file(&new_client->dev, &dev_attr_temp2_crit);
634 if (data->channel & CHAN_TEMP3) {
635 device_create_file(&new_client->dev, &dev_attr_temp3_input);
636 device_create_file(&new_client->dev, &dev_attr_temp3_max);
637 device_create_file(&new_client->dev, &dev_attr_temp3_min);
638 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
640 device_create_file(&new_client->dev, &dev_attr_in0_input);
641 device_create_file(&new_client->dev, &dev_attr_in0_min);
642 device_create_file(&new_client->dev, &dev_attr_in0_max);
643 device_create_file(&new_client->dev, &dev_attr_in5_input);
644 device_create_file(&new_client->dev, &dev_attr_in5_min);
645 device_create_file(&new_client->dev, &dev_attr_in5_max);
648 if (!(data->channel & CHAN_NO_VID)) {
649 device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
650 device_create_file(&new_client->dev, &dev_attr_vrm);
653 device_create_file(&new_client->dev, &dev_attr_alarms);
654 device_create_file(&new_client->dev, &dev_attr_aout_output);
664 static void lm87_init_client(struct i2c_client *client)
666 struct lm87_data *data = i2c_get_clientdata(client);
669 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
670 data->vrm = i2c_which_vrm();
672 config = lm87_read_value(client, LM87_REG_CONFIG);
673 if (!(config & 0x01)) {
676 /* Limits are left uninitialized after power-up */
677 for (i = 1; i < 6; i++) {
678 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
679 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
681 for (i = 0; i < 2; i++) {
682 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
683 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
684 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
685 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
687 if (data->channel & CHAN_TEMP3) {
688 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
689 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
691 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
692 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
695 if ((config & 0x81) != 0x01) {
696 /* Start monitoring */
697 lm87_write_value(client, LM87_REG_CONFIG,
698 (config & 0xF7) | 0x01);
702 static int lm87_detach_client(struct i2c_client *client)
706 if ((err = i2c_detach_client(client))) {
707 dev_err(&client->dev, "Client deregistration failed, "
708 "client not detached.\n");
712 kfree(i2c_get_clientdata(client));
716 static struct lm87_data *lm87_update_device(struct device *dev)
718 struct i2c_client *client = to_i2c_client(dev);
719 struct lm87_data *data = i2c_get_clientdata(client);
721 down(&data->update_lock);
723 if (jiffies - data->last_updated > HZ
724 || jiffies < data->last_updated
728 dev_dbg(&client->dev, "Updating data.\n");
730 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
731 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
733 data->in[i] = lm87_read_value(client,
735 data->in_min[i] = lm87_read_value(client,
737 data->in_max[i] = lm87_read_value(client,
741 for (i = 0; i < 2; i++) {
742 if (data->channel & CHAN_NO_FAN(i)) {
743 data->in[6+i] = lm87_read_value(client,
745 data->in_max[6+i] = lm87_read_value(client,
746 LM87_REG_AIN_MAX(i));
747 data->in_min[6+i] = lm87_read_value(client,
748 LM87_REG_AIN_MIN(i));
751 data->fan[i] = lm87_read_value(client,
753 data->fan_min[i] = lm87_read_value(client,
754 LM87_REG_FAN_MIN(i));
758 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
759 for (i = 0 ; i < j; i++) {
760 data->temp[i] = lm87_read_value(client,
762 data->temp_high[i] = lm87_read_value(client,
763 LM87_REG_TEMP_HIGH[i]);
764 data->temp_low[i] = lm87_read_value(client,
765 LM87_REG_TEMP_LOW[i]);
768 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
769 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
770 data->temp_crit_int = min(i, j);
772 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
773 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
774 data->temp_crit_ext = min(i, j);
776 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
777 data->fan_div[0] = (i >> 4) & 0x03;
778 data->fan_div[1] = (i >> 6) & 0x03;
779 data->vid = (i & 0x0F)
780 | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
783 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
784 | (lm87_read_value(client, LM87_REG_ALARMS2)
786 data->aout = lm87_read_value(client, LM87_REG_AOUT);
788 data->last_updated = jiffies;
792 up(&data->update_lock);
797 static int __init sensors_lm87_init(void)
799 return i2c_add_driver(&lm87_driver);
802 static void __exit sensors_lm87_exit(void)
804 i2c_del_driver(&lm87_driver);
807 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
808 MODULE_DESCRIPTION("LM87 driver");
809 MODULE_LICENSE("GPL");
811 module_init(sensors_lm87_init);
812 module_exit(sensors_lm87_exit);