aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/hwmon/lm80.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/lm80.c')
-rw-r--r--drivers/hwmon/lm80.c601
1 files changed, 601 insertions, 0 deletions
diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
new file mode 100644
index 000000000000..8100595feb44
--- /dev/null
+++ b/drivers/hwmon/lm80.c
@@ -0,0 +1,601 @@
1/*
2 * lm80.c - From lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5 * and Philip Edelbrock <phil@netroedge.com>
6 *
7 * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
8 *
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.
13 *
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.
18 *
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.
22 */
23
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
31/* Addresses to scan */
32static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c,
33 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
34static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
35
36/* Insmod parameters */
37SENSORS_INSMOD_1(lm80);
38
39/* Many LM80 constants specified below */
40
41/* The LM80 registers */
42#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
43#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
44#define LM80_REG_IN(nr) (0x20 + (nr))
45
46#define LM80_REG_FAN1 0x28
47#define LM80_REG_FAN2 0x29
48#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
49
50#define LM80_REG_TEMP 0x27
51#define LM80_REG_TEMP_HOT_MAX 0x38
52#define LM80_REG_TEMP_HOT_HYST 0x39
53#define LM80_REG_TEMP_OS_MAX 0x3a
54#define LM80_REG_TEMP_OS_HYST 0x3b
55
56#define LM80_REG_CONFIG 0x00
57#define LM80_REG_ALARM1 0x01
58#define LM80_REG_ALARM2 0x02
59#define LM80_REG_MASK1 0x03
60#define LM80_REG_MASK2 0x04
61#define LM80_REG_FANDIV 0x05
62#define LM80_REG_RES 0x06
63
64
65/* Conversions. Rounding and limit checking is only done on the TO_REG
66 variants. Note that you should be a bit careful with which arguments
67 these macros are called: arguments may be evaluated more than once.
68 Fixing this is just not worth it. */
69
70#define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
71#define IN_FROM_REG(val) ((val)*10)
72
73static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
74{
75 if (rpm == 0)
76 return 255;
77 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
78 return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
79}
80
81#define FAN_FROM_REG(val,div) ((val)==0?-1:\
82 (val)==255?0:1350000/((div)*(val)))
83
84static inline long TEMP_FROM_REG(u16 temp)
85{
86 long res;
87
88 temp >>= 4;
89 if (temp < 0x0800)
90 res = 625 * (long) temp;
91 else
92 res = ((long) temp - 0x01000) * 625;
93
94 return res / 10;
95}
96
97#define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
98
99#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
100 ((val)-500)/1000:((val)+500)/1000,0,255)
101
102#define DIV_FROM_REG(val) (1 << (val))
103
104/*
105 * Client data (each client gets its own)
106 */
107
108struct lm80_data {
109 struct i2c_client client;
110 struct semaphore update_lock;
111 char valid; /* !=0 if following fields are valid */
112 unsigned long last_updated; /* In jiffies */
113
114 u8 in[7]; /* Register value */
115 u8 in_max[7]; /* Register value */
116 u8 in_min[7]; /* Register value */
117 u8 fan[2]; /* Register value */
118 u8 fan_min[2]; /* Register value */
119 u8 fan_div[2]; /* Register encoding, shifted right */
120 u16 temp; /* Register values, shifted right */
121 u8 temp_hot_max; /* Register value */
122 u8 temp_hot_hyst; /* Register value */
123 u8 temp_os_max; /* Register value */
124 u8 temp_os_hyst; /* Register value */
125 u16 alarms; /* Register encoding, combined */
126};
127
128/*
129 * Functions declaration
130 */
131
132static int lm80_attach_adapter(struct i2c_adapter *adapter);
133static int lm80_detect(struct i2c_adapter *adapter, int address, int kind);
134static void lm80_init_client(struct i2c_client *client);
135static int lm80_detach_client(struct i2c_client *client);
136static struct lm80_data *lm80_update_device(struct device *dev);
137static int lm80_read_value(struct i2c_client *client, u8 reg);
138static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
139
140/*
141 * Driver data (common to all clients)
142 */
143
144static struct i2c_driver lm80_driver = {
145 .owner = THIS_MODULE,
146 .name = "lm80",
147 .id = I2C_DRIVERID_LM80,
148 .flags = I2C_DF_NOTIFY,
149 .attach_adapter = lm80_attach_adapter,
150 .detach_client = lm80_detach_client,
151};
152
153/*
154 * Sysfs stuff
155 */
156
157#define show_in(suffix, value) \
158static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
159{ \
160 struct lm80_data *data = lm80_update_device(dev); \
161 return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \
162}
163show_in(min0, in_min[0]);
164show_in(min1, in_min[1]);
165show_in(min2, in_min[2]);
166show_in(min3, in_min[3]);
167show_in(min4, in_min[4]);
168show_in(min5, in_min[5]);
169show_in(min6, in_min[6]);
170show_in(max0, in_max[0]);
171show_in(max1, in_max[1]);
172show_in(max2, in_max[2]);
173show_in(max3, in_max[3]);
174show_in(max4, in_max[4]);
175show_in(max5, in_max[5]);
176show_in(max6, in_max[6]);
177show_in(input0, in[0]);
178show_in(input1, in[1]);
179show_in(input2, in[2]);
180show_in(input3, in[3]);
181show_in(input4, in[4]);
182show_in(input5, in[5]);
183show_in(input6, in[6]);
184
185#define set_in(suffix, value, reg) \
186static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
187 size_t count) \
188{ \
189 struct i2c_client *client = to_i2c_client(dev); \
190 struct lm80_data *data = i2c_get_clientdata(client); \
191 long val = simple_strtol(buf, NULL, 10); \
192 \
193 down(&data->update_lock);\
194 data->value = IN_TO_REG(val); \
195 lm80_write_value(client, reg, data->value); \
196 up(&data->update_lock);\
197 return count; \
198}
199set_in(min0, in_min[0], LM80_REG_IN_MIN(0));
200set_in(min1, in_min[1], LM80_REG_IN_MIN(1));
201set_in(min2, in_min[2], LM80_REG_IN_MIN(2));
202set_in(min3, in_min[3], LM80_REG_IN_MIN(3));
203set_in(min4, in_min[4], LM80_REG_IN_MIN(4));
204set_in(min5, in_min[5], LM80_REG_IN_MIN(5));
205set_in(min6, in_min[6], LM80_REG_IN_MIN(6));
206set_in(max0, in_max[0], LM80_REG_IN_MAX(0));
207set_in(max1, in_max[1], LM80_REG_IN_MAX(1));
208set_in(max2, in_max[2], LM80_REG_IN_MAX(2));
209set_in(max3, in_max[3], LM80_REG_IN_MAX(3));
210set_in(max4, in_max[4], LM80_REG_IN_MAX(4));
211set_in(max5, in_max[5], LM80_REG_IN_MAX(5));
212set_in(max6, in_max[6], LM80_REG_IN_MAX(6));
213
214#define show_fan(suffix, value, div) \
215static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
216{ \
217 struct lm80_data *data = lm80_update_device(dev); \
218 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \
219 DIV_FROM_REG(data->div))); \
220}
221show_fan(min1, fan_min[0], fan_div[0]);
222show_fan(min2, fan_min[1], fan_div[1]);
223show_fan(input1, fan[0], fan_div[0]);
224show_fan(input2, fan[1], fan_div[1]);
225
226#define show_fan_div(suffix, value) \
227static ssize_t show_fan_div##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
228{ \
229 struct lm80_data *data = lm80_update_device(dev); \
230 return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \
231}
232show_fan_div(1, fan_div[0]);
233show_fan_div(2, fan_div[1]);
234
235#define set_fan(suffix, value, reg, div) \
236static ssize_t set_fan_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
237 size_t count) \
238{ \
239 struct i2c_client *client = to_i2c_client(dev); \
240 struct lm80_data *data = i2c_get_clientdata(client); \
241 long val = simple_strtoul(buf, NULL, 10); \
242 \
243 down(&data->update_lock);\
244 data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \
245 lm80_write_value(client, reg, data->value); \
246 up(&data->update_lock);\
247 return count; \
248}
249set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]);
250set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]);
251
252/* Note: we save and restore the fan minimum here, because its value is
253 determined in part by the fan divisor. This follows the principle of
254 least suprise; the user doesn't expect the fan minimum to change just
255 because the divisor changed. */
256static ssize_t set_fan_div(struct device *dev, const char *buf,
257 size_t count, int nr)
258{
259 struct i2c_client *client = to_i2c_client(dev);
260 struct lm80_data *data = i2c_get_clientdata(client);
261 unsigned long min, val = simple_strtoul(buf, NULL, 10);
262 u8 reg;
263
264 /* Save fan_min */
265 down(&data->update_lock);
266 min = FAN_FROM_REG(data->fan_min[nr],
267 DIV_FROM_REG(data->fan_div[nr]));
268
269 switch (val) {
270 case 1: data->fan_div[nr] = 0; break;
271 case 2: data->fan_div[nr] = 1; break;
272 case 4: data->fan_div[nr] = 2; break;
273 case 8: data->fan_div[nr] = 3; break;
274 default:
275 dev_err(&client->dev, "fan_div value %ld not "
276 "supported. Choose one of 1, 2, 4 or 8!\n", val);
277 up(&data->update_lock);
278 return -EINVAL;
279 }
280
281 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
282 | (data->fan_div[nr] << (2 * (nr + 1)));
283 lm80_write_value(client, LM80_REG_FANDIV, reg);
284
285 /* Restore fan_min */
286 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
287 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
288 up(&data->update_lock);
289
290 return count;
291}
292
293#define set_fan_div(number) \
294static ssize_t set_fan_div##number(struct device *dev, struct device_attribute *attr, const char *buf, \
295 size_t count) \
296{ \
297 return set_fan_div(dev, buf, count, number - 1); \
298}
299set_fan_div(1);
300set_fan_div(2);
301
302static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf)
303{
304 struct lm80_data *data = lm80_update_device(dev);
305 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
306}
307
308#define show_temp(suffix, value) \
309static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
310{ \
311 struct lm80_data *data = lm80_update_device(dev); \
312 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
313}
314show_temp(hot_max, temp_hot_max);
315show_temp(hot_hyst, temp_hot_hyst);
316show_temp(os_max, temp_os_max);
317show_temp(os_hyst, temp_os_hyst);
318
319#define set_temp(suffix, value, reg) \
320static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
321 size_t count) \
322{ \
323 struct i2c_client *client = to_i2c_client(dev); \
324 struct lm80_data *data = i2c_get_clientdata(client); \
325 long val = simple_strtoul(buf, NULL, 10); \
326 \
327 down(&data->update_lock); \
328 data->value = TEMP_LIMIT_TO_REG(val); \
329 lm80_write_value(client, reg, data->value); \
330 up(&data->update_lock); \
331 return count; \
332}
333set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
334set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
335set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
336set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
337
338static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
339{
340 struct lm80_data *data = lm80_update_device(dev);
341 return sprintf(buf, "%u\n", data->alarms);
342}
343
344static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0);
345static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1);
346static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2);
347static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3);
348static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4);
349static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5);
350static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6);
351static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0);
352static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1);
353static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2);
354static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3);
355static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4);
356static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5);
357static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6);
358static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
359static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
360static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
361static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
362static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL);
363static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL);
364static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL);
365static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1,
366 set_fan_min1);
367static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2,
368 set_fan_min2);
369static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL);
370static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL);
371static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1);
372static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2);
373static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
374static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
375 set_temp_hot_max);
376static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
377 set_temp_hot_hyst);
378static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
379 set_temp_os_max);
380static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
381 set_temp_os_hyst);
382static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
383
384/*
385 * Real code
386 */
387
388static int lm80_attach_adapter(struct i2c_adapter *adapter)
389{
390 if (!(adapter->class & I2C_CLASS_HWMON))
391 return 0;
392 return i2c_detect(adapter, &addr_data, lm80_detect);
393}
394
395int lm80_detect(struct i2c_adapter *adapter, int address, int kind)
396{
397 int i, cur;
398 struct i2c_client *new_client;
399 struct lm80_data *data;
400 int err = 0;
401 const char *name;
402
403 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
404 goto exit;
405
406 /* OK. For now, we presume we have a valid client. We now create the
407 client structure, even though we cannot fill it completely yet.
408 But it allows us to access lm80_{read,write}_value. */
409 if (!(data = kmalloc(sizeof(struct lm80_data), GFP_KERNEL))) {
410 err = -ENOMEM;
411 goto exit;
412 }
413 memset(data, 0, sizeof(struct lm80_data));
414
415 new_client = &data->client;
416 i2c_set_clientdata(new_client, data);
417 new_client->addr = address;
418 new_client->adapter = adapter;
419 new_client->driver = &lm80_driver;
420 new_client->flags = 0;
421
422 /* Now, we do the remaining detection. It is lousy. */
423 if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0)
424 goto error_free;
425 for (i = 0x2a; i <= 0x3d; i++) {
426 cur = i2c_smbus_read_byte_data(new_client, i);
427 if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur)
428 || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur)
429 || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur))
430 goto error_free;
431 }
432
433 /* Determine the chip type - only one kind supported! */
434 kind = lm80;
435 name = "lm80";
436
437 /* Fill in the remaining client fields and put it into the global list */
438 strlcpy(new_client->name, name, I2C_NAME_SIZE);
439 data->valid = 0;
440 init_MUTEX(&data->update_lock);
441
442 /* Tell the I2C layer a new client has arrived */
443 if ((err = i2c_attach_client(new_client)))
444 goto error_free;
445
446 /* Initialize the LM80 chip */
447 lm80_init_client(new_client);
448
449 /* A few vars need to be filled upon startup */
450 data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1));
451 data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2));
452
453 /* Register sysfs hooks */
454 device_create_file(&new_client->dev, &dev_attr_in0_min);
455 device_create_file(&new_client->dev, &dev_attr_in1_min);
456 device_create_file(&new_client->dev, &dev_attr_in2_min);
457 device_create_file(&new_client->dev, &dev_attr_in3_min);
458 device_create_file(&new_client->dev, &dev_attr_in4_min);
459 device_create_file(&new_client->dev, &dev_attr_in5_min);
460 device_create_file(&new_client->dev, &dev_attr_in6_min);
461 device_create_file(&new_client->dev, &dev_attr_in0_max);
462 device_create_file(&new_client->dev, &dev_attr_in1_max);
463 device_create_file(&new_client->dev, &dev_attr_in2_max);
464 device_create_file(&new_client->dev, &dev_attr_in3_max);
465 device_create_file(&new_client->dev, &dev_attr_in4_max);
466 device_create_file(&new_client->dev, &dev_attr_in5_max);
467 device_create_file(&new_client->dev, &dev_attr_in6_max);
468 device_create_file(&new_client->dev, &dev_attr_in0_input);
469 device_create_file(&new_client->dev, &dev_attr_in1_input);
470 device_create_file(&new_client->dev, &dev_attr_in2_input);
471 device_create_file(&new_client->dev, &dev_attr_in3_input);
472 device_create_file(&new_client->dev, &dev_attr_in4_input);
473 device_create_file(&new_client->dev, &dev_attr_in5_input);
474 device_create_file(&new_client->dev, &dev_attr_in6_input);
475 device_create_file(&new_client->dev, &dev_attr_fan1_min);
476 device_create_file(&new_client->dev, &dev_attr_fan2_min);
477 device_create_file(&new_client->dev, &dev_attr_fan1_input);
478 device_create_file(&new_client->dev, &dev_attr_fan2_input);
479 device_create_file(&new_client->dev, &dev_attr_fan1_div);
480 device_create_file(&new_client->dev, &dev_attr_fan2_div);
481 device_create_file(&new_client->dev, &dev_attr_temp1_input);
482 device_create_file(&new_client->dev, &dev_attr_temp1_max);
483 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
484 device_create_file(&new_client->dev, &dev_attr_temp1_crit);
485 device_create_file(&new_client->dev, &dev_attr_temp1_crit_hyst);
486 device_create_file(&new_client->dev, &dev_attr_alarms);
487
488 return 0;
489
490error_free:
491 kfree(data);
492exit:
493 return err;
494}
495
496static int lm80_detach_client(struct i2c_client *client)
497{
498 int err;
499
500 if ((err = i2c_detach_client(client))) {
501 dev_err(&client->dev, "Client deregistration failed, "
502 "client not detached.\n");
503 return err;
504 }
505
506 kfree(i2c_get_clientdata(client));
507 return 0;
508}
509
510static int lm80_read_value(struct i2c_client *client, u8 reg)
511{
512 return i2c_smbus_read_byte_data(client, reg);
513}
514
515static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
516{
517 return i2c_smbus_write_byte_data(client, reg, value);
518}
519
520/* Called when we have found a new LM80. */
521static void lm80_init_client(struct i2c_client *client)
522{
523 /* Reset all except Watchdog values and last conversion values
524 This sets fan-divs to 2, among others. This makes most other
525 initializations unnecessary */
526 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
527 /* Set 11-bit temperature resolution */
528 lm80_write_value(client, LM80_REG_RES, 0x08);
529
530 /* Start monitoring */
531 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
532}
533
534static struct lm80_data *lm80_update_device(struct device *dev)
535{
536 struct i2c_client *client = to_i2c_client(dev);
537 struct lm80_data *data = i2c_get_clientdata(client);
538 int i;
539
540 down(&data->update_lock);
541
542 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
543 dev_dbg(&client->dev, "Starting lm80 update\n");
544 for (i = 0; i <= 6; i++) {
545 data->in[i] =
546 lm80_read_value(client, LM80_REG_IN(i));
547 data->in_min[i] =
548 lm80_read_value(client, LM80_REG_IN_MIN(i));
549 data->in_max[i] =
550 lm80_read_value(client, LM80_REG_IN_MAX(i));
551 }
552 data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
553 data->fan_min[0] =
554 lm80_read_value(client, LM80_REG_FAN_MIN(1));
555 data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
556 data->fan_min[1] =
557 lm80_read_value(client, LM80_REG_FAN_MIN(2));
558
559 data->temp =
560 (lm80_read_value(client, LM80_REG_TEMP) << 8) |
561 (lm80_read_value(client, LM80_REG_RES) & 0xf0);
562 data->temp_os_max =
563 lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
564 data->temp_os_hyst =
565 lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
566 data->temp_hot_max =
567 lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
568 data->temp_hot_hyst =
569 lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
570
571 i = lm80_read_value(client, LM80_REG_FANDIV);
572 data->fan_div[0] = (i >> 2) & 0x03;
573 data->fan_div[1] = (i >> 4) & 0x03;
574 data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
575 (lm80_read_value(client, LM80_REG_ALARM2) << 8);
576 data->last_updated = jiffies;
577 data->valid = 1;
578 }
579
580 up(&data->update_lock);
581
582 return data;
583}
584
585static int __init sensors_lm80_init(void)
586{
587 return i2c_add_driver(&lm80_driver);
588}
589
590static void __exit sensors_lm80_exit(void)
591{
592 i2c_del_driver(&lm80_driver);
593}
594
595MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
596 "Philip Edelbrock <phil@netroedge.com>");
597MODULE_DESCRIPTION("LM80 driver");
598MODULE_LICENSE("GPL");
599
600module_init(sensors_lm80_init);
601module_exit(sensors_lm80_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-02 09:51:56 -0500