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Diffstat (limited to 'drivers/i2c/chips/lm80.c')
-rw-r--r--drivers/i2c/chips/lm80.c602
1 files changed, 602 insertions, 0 deletions
diff --git a/drivers/i2c/chips/lm80.c b/drivers/i2c/chips/lm80.c
new file mode 100644
index 000000000000..a72f431971bb
--- /dev/null
+++ b/drivers/i2c/chips/lm80.c
@@ -0,0 +1,602 @@
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/config.h>
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/slab.h>
28#include <linux/jiffies.h>
29#include <linux/i2c.h>
30#include <linux/i2c-sensor.h>
31
32/* Addresses to scan */
33static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c,
34 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
35static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
36
37/* Insmod parameters */
38SENSORS_INSMOD_1(lm80);
39
40/* Many LM80 constants specified below */
41
42/* The LM80 registers */
43#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
44#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
45#define LM80_REG_IN(nr) (0x20 + (nr))
46
47#define LM80_REG_FAN1 0x28
48#define LM80_REG_FAN2 0x29
49#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
50
51#define LM80_REG_TEMP 0x27
52#define LM80_REG_TEMP_HOT_MAX 0x38
53#define LM80_REG_TEMP_HOT_HYST 0x39
54#define LM80_REG_TEMP_OS_MAX 0x3a
55#define LM80_REG_TEMP_OS_HYST 0x3b
56
57#define LM80_REG_CONFIG 0x00
58#define LM80_REG_ALARM1 0x01
59#define LM80_REG_ALARM2 0x02
60#define LM80_REG_MASK1 0x03
61#define LM80_REG_MASK2 0x04
62#define LM80_REG_FANDIV 0x05
63#define LM80_REG_RES 0x06
64
65
66/* Conversions. Rounding and limit checking is only done on the TO_REG
67 variants. Note that you should be a bit careful with which arguments
68 these macros are called: arguments may be evaluated more than once.
69 Fixing this is just not worth it. */
70
71#define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
72#define IN_FROM_REG(val) ((val)*10)
73
74static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
75{
76 if (rpm == 0)
77 return 255;
78 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
79 return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
80}
81
82#define FAN_FROM_REG(val,div) ((val)==0?-1:\
83 (val)==255?0:1350000/((div)*(val)))
84
85static inline long TEMP_FROM_REG(u16 temp)
86{
87 long res;
88
89 temp >>= 4;
90 if (temp < 0x0800)
91 res = 625 * (long) temp;
92 else
93 res = ((long) temp - 0x01000) * 625;
94
95 return res / 10;
96}
97
98#define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
99
100#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
101 ((val)-500)/1000:((val)+500)/1000,0,255)
102
103#define DIV_FROM_REG(val) (1 << (val))
104
105/*
106 * Client data (each client gets its own)
107 */
108
109struct lm80_data {
110 struct i2c_client client;
111 struct semaphore update_lock;
112 char valid; /* !=0 if following fields are valid */
113 unsigned long last_updated; /* In jiffies */
114
115 u8 in[7]; /* Register value */
116 u8 in_max[7]; /* Register value */
117 u8 in_min[7]; /* Register value */
118 u8 fan[2]; /* Register value */
119 u8 fan_min[2]; /* Register value */
120 u8 fan_div[2]; /* Register encoding, shifted right */
121 u16 temp; /* Register values, shifted right */
122 u8 temp_hot_max; /* Register value */
123 u8 temp_hot_hyst; /* Register value */
124 u8 temp_os_max; /* Register value */
125 u8 temp_os_hyst; /* Register value */
126 u16 alarms; /* Register encoding, combined */
127};
128
129/*
130 * Functions declaration
131 */
132
133static int lm80_attach_adapter(struct i2c_adapter *adapter);
134static int lm80_detect(struct i2c_adapter *adapter, int address, int kind);
135static void lm80_init_client(struct i2c_client *client);
136static int lm80_detach_client(struct i2c_client *client);
137static struct lm80_data *lm80_update_device(struct device *dev);
138static int lm80_read_value(struct i2c_client *client, u8 reg);
139static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
140
141/*
142 * Driver data (common to all clients)
143 */
144
145static struct i2c_driver lm80_driver = {
146 .owner = THIS_MODULE,
147 .name = "lm80",
148 .id = I2C_DRIVERID_LM80,
149 .flags = I2C_DF_NOTIFY,
150 .attach_adapter = lm80_attach_adapter,
151 .detach_client = lm80_detach_client,
152};
153
154/*
155 * Sysfs stuff
156 */
157
158#define show_in(suffix, value) \
159static ssize_t show_in_##suffix(struct device *dev, char *buf) \
160{ \
161 struct lm80_data *data = lm80_update_device(dev); \
162 return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \
163}
164show_in(min0, in_min[0]);
165show_in(min1, in_min[1]);
166show_in(min2, in_min[2]);
167show_in(min3, in_min[3]);
168show_in(min4, in_min[4]);
169show_in(min5, in_min[5]);
170show_in(min6, in_min[6]);
171show_in(max0, in_max[0]);
172show_in(max1, in_max[1]);
173show_in(max2, in_max[2]);
174show_in(max3, in_max[3]);
175show_in(max4, in_max[4]);
176show_in(max5, in_max[5]);
177show_in(max6, in_max[6]);
178show_in(input0, in[0]);
179show_in(input1, in[1]);
180show_in(input2, in[2]);
181show_in(input3, in[3]);
182show_in(input4, in[4]);
183show_in(input5, in[5]);
184show_in(input6, in[6]);
185
186#define set_in(suffix, value, reg) \
187static ssize_t set_in_##suffix(struct device *dev, const char *buf, \
188 size_t count) \
189{ \
190 struct i2c_client *client = to_i2c_client(dev); \
191 struct lm80_data *data = i2c_get_clientdata(client); \
192 long val = simple_strtol(buf, NULL, 10); \
193 \
194 down(&data->update_lock);\
195 data->value = IN_TO_REG(val); \
196 lm80_write_value(client, reg, data->value); \
197 up(&data->update_lock);\
198 return count; \
199}
200set_in(min0, in_min[0], LM80_REG_IN_MIN(0));
201set_in(min1, in_min[1], LM80_REG_IN_MIN(1));
202set_in(min2, in_min[2], LM80_REG_IN_MIN(2));
203set_in(min3, in_min[3], LM80_REG_IN_MIN(3));
204set_in(min4, in_min[4], LM80_REG_IN_MIN(4));
205set_in(min5, in_min[5], LM80_REG_IN_MIN(5));
206set_in(min6, in_min[6], LM80_REG_IN_MIN(6));
207set_in(max0, in_max[0], LM80_REG_IN_MAX(0));
208set_in(max1, in_max[1], LM80_REG_IN_MAX(1));
209set_in(max2, in_max[2], LM80_REG_IN_MAX(2));
210set_in(max3, in_max[3], LM80_REG_IN_MAX(3));
211set_in(max4, in_max[4], LM80_REG_IN_MAX(4));
212set_in(max5, in_max[5], LM80_REG_IN_MAX(5));
213set_in(max6, in_max[6], LM80_REG_IN_MAX(6));
214
215#define show_fan(suffix, value, div) \
216static ssize_t show_fan_##suffix(struct device *dev, char *buf) \
217{ \
218 struct lm80_data *data = lm80_update_device(dev); \
219 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \
220 DIV_FROM_REG(data->div))); \
221}
222show_fan(min1, fan_min[0], fan_div[0]);
223show_fan(min2, fan_min[1], fan_div[1]);
224show_fan(input1, fan[0], fan_div[0]);
225show_fan(input2, fan[1], fan_div[1]);
226
227#define show_fan_div(suffix, value) \
228static ssize_t show_fan_div##suffix(struct device *dev, char *buf) \
229{ \
230 struct lm80_data *data = lm80_update_device(dev); \
231 return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \
232}
233show_fan_div(1, fan_div[0]);
234show_fan_div(2, fan_div[1]);
235
236#define set_fan(suffix, value, reg, div) \
237static ssize_t set_fan_##suffix(struct device *dev, const char *buf, \
238 size_t count) \
239{ \
240 struct i2c_client *client = to_i2c_client(dev); \
241 struct lm80_data *data = i2c_get_clientdata(client); \
242 long val = simple_strtoul(buf, NULL, 10); \
243 \
244 down(&data->update_lock);\
245 data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \
246 lm80_write_value(client, reg, data->value); \
247 up(&data->update_lock);\
248 return count; \
249}
250set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]);
251set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]);
252
253/* Note: we save and restore the fan minimum here, because its value is
254 determined in part by the fan divisor. This follows the principle of
255 least suprise; the user doesn't expect the fan minimum to change just
256 because the divisor changed. */
257static ssize_t set_fan_div(struct device *dev, const char *buf,
258 size_t count, int nr)
259{
260 struct i2c_client *client = to_i2c_client(dev);
261 struct lm80_data *data = i2c_get_clientdata(client);
262 unsigned long min, val = simple_strtoul(buf, NULL, 10);
263 u8 reg;
264
265 /* Save fan_min */
266 down(&data->update_lock);
267 min = FAN_FROM_REG(data->fan_min[nr],
268 DIV_FROM_REG(data->fan_div[nr]));
269
270 switch (val) {
271 case 1: data->fan_div[nr] = 0; break;
272 case 2: data->fan_div[nr] = 1; break;
273 case 4: data->fan_div[nr] = 2; break;
274 case 8: data->fan_div[nr] = 3; break;
275 default:
276 dev_err(&client->dev, "fan_div value %ld not "
277 "supported. Choose one of 1, 2, 4 or 8!\n", val);
278 up(&data->update_lock);
279 return -EINVAL;
280 }
281
282 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
283 | (data->fan_div[nr] << (2 * (nr + 1)));
284 lm80_write_value(client, LM80_REG_FANDIV, reg);
285
286 /* Restore fan_min */
287 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
288 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
289 up(&data->update_lock);
290
291 return count;
292}
293
294#define set_fan_div(number) \
295static ssize_t set_fan_div##number(struct device *dev, const char *buf, \
296 size_t count) \
297{ \
298 return set_fan_div(dev, buf, count, number - 1); \
299}
300set_fan_div(1);
301set_fan_div(2);
302
303static ssize_t show_temp_input1(struct device *dev, char *buf)
304{
305 struct lm80_data *data = lm80_update_device(dev);
306 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
307}
308
309#define show_temp(suffix, value) \
310static ssize_t show_temp_##suffix(struct device *dev, char *buf) \
311{ \
312 struct lm80_data *data = lm80_update_device(dev); \
313 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
314}
315show_temp(hot_max, temp_hot_max);
316show_temp(hot_hyst, temp_hot_hyst);
317show_temp(os_max, temp_os_max);
318show_temp(os_hyst, temp_os_hyst);
319
320#define set_temp(suffix, value, reg) \
321static ssize_t set_temp_##suffix(struct device *dev, const char *buf, \
322 size_t count) \
323{ \
324 struct i2c_client *client = to_i2c_client(dev); \
325 struct lm80_data *data = i2c_get_clientdata(client); \
326 long val = simple_strtoul(buf, NULL, 10); \
327 \
328 down(&data->update_lock); \
329 data->value = TEMP_LIMIT_TO_REG(val); \
330 lm80_write_value(client, reg, data->value); \
331 up(&data->update_lock); \
332 return count; \
333}
334set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
335set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
336set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
337set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
338
339static ssize_t show_alarms(struct device *dev, char *buf)
340{
341 struct lm80_data *data = lm80_update_device(dev);
342 return sprintf(buf, "%u\n", data->alarms);
343}
344
345static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0);
346static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1);
347static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2);
348static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3);
349static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4);
350static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5);
351static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6);
352static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0);
353static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1);
354static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2);
355static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3);
356static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4);
357static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5);
358static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6);
359static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
360static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
361static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
362static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
363static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL);
364static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL);
365static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL);
366static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1,
367 set_fan_min1);
368static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2,
369 set_fan_min2);
370static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL);
371static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL);
372static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1);
373static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2);
374static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
375static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
376 set_temp_hot_max);
377static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
378 set_temp_hot_hyst);
379static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
380 set_temp_os_max);
381static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
382 set_temp_os_hyst);
383static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
384
385/*
386 * Real code
387 */
388
389static int lm80_attach_adapter(struct i2c_adapter *adapter)
390{
391 if (!(adapter->class & I2C_CLASS_HWMON))
392 return 0;
393 return i2c_detect(adapter, &addr_data, lm80_detect);
394}
395
396int lm80_detect(struct i2c_adapter *adapter, int address, int kind)
397{
398 int i, cur;
399 struct i2c_client *new_client;
400 struct lm80_data *data;
401 int err = 0;
402 const char *name;
403
404 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
405 goto exit;
406
407 /* OK. For now, we presume we have a valid client. We now create the
408 client structure, even though we cannot fill it completely yet.
409 But it allows us to access lm80_{read,write}_value. */
410 if (!(data = kmalloc(sizeof(struct lm80_data), GFP_KERNEL))) {
411 err = -ENOMEM;
412 goto exit;
413 }
414 memset(data, 0, sizeof(struct lm80_data));
415
416 new_client = &data->client;
417 i2c_set_clientdata(new_client, data);
418 new_client->addr = address;
419 new_client->adapter = adapter;
420 new_client->driver = &lm80_driver;
421 new_client->flags = 0;
422
423 /* Now, we do the remaining detection. It is lousy. */
424 if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0)
425 goto error_free;
426 for (i = 0x2a; i <= 0x3d; i++) {
427 cur = i2c_smbus_read_byte_data(new_client, i);
428 if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur)
429 || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur)
430 || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur))
431 goto error_free;
432 }
433
434 /* Determine the chip type - only one kind supported! */
435 kind = lm80;
436 name = "lm80";
437
438 /* Fill in the remaining client fields and put it into the global list */
439 strlcpy(new_client->name, name, I2C_NAME_SIZE);
440 data->valid = 0;
441 init_MUTEX(&data->update_lock);
442
443 /* Tell the I2C layer a new client has arrived */
444 if ((err = i2c_attach_client(new_client)))
445 goto error_free;
446
447 /* Initialize the LM80 chip */
448 lm80_init_client(new_client);
449
450 /* A few vars need to be filled upon startup */
451 data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1));
452 data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2));
453
454 /* Register sysfs hooks */
455 device_create_file(&new_client->dev, &dev_attr_in0_min);
456 device_create_file(&new_client->dev, &dev_attr_in1_min);
457 device_create_file(&new_client->dev, &dev_attr_in2_min);
458 device_create_file(&new_client->dev, &dev_attr_in3_min);
459 device_create_file(&new_client->dev, &dev_attr_in4_min);
460 device_create_file(&new_client->dev, &dev_attr_in5_min);
461 device_create_file(&new_client->dev, &dev_attr_in6_min);
462 device_create_file(&new_client->dev, &dev_attr_in0_max);
463 device_create_file(&new_client->dev, &dev_attr_in1_max);
464 device_create_file(&new_client->dev, &dev_attr_in2_max);
465 device_create_file(&new_client->dev, &dev_attr_in3_max);
466 device_create_file(&new_client->dev, &dev_attr_in4_max);
467 device_create_file(&new_client->dev, &dev_attr_in5_max);
468 device_create_file(&new_client->dev, &dev_attr_in6_max);
469 device_create_file(&new_client->dev, &dev_attr_in0_input);
470 device_create_file(&new_client->dev, &dev_attr_in1_input);
471 device_create_file(&new_client->dev, &dev_attr_in2_input);
472 device_create_file(&new_client->dev, &dev_attr_in3_input);
473 device_create_file(&new_client->dev, &dev_attr_in4_input);
474 device_create_file(&new_client->dev, &dev_attr_in5_input);
475 device_create_file(&new_client->dev, &dev_attr_in6_input);
476 device_create_file(&new_client->dev, &dev_attr_fan1_min);
477 device_create_file(&new_client->dev, &dev_attr_fan2_min);
478 device_create_file(&new_client->dev, &dev_attr_fan1_input);
479 device_create_file(&new_client->dev, &dev_attr_fan2_input);
480 device_create_file(&new_client->dev, &dev_attr_fan1_div);
481 device_create_file(&new_client->dev, &dev_attr_fan2_div);
482 device_create_file(&new_client->dev, &dev_attr_temp1_input);
483 device_create_file(&new_client->dev, &dev_attr_temp1_max);
484 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
485 device_create_file(&new_client->dev, &dev_attr_temp1_crit);
486 device_create_file(&new_client->dev, &dev_attr_temp1_crit_hyst);
487 device_create_file(&new_client->dev, &dev_attr_alarms);
488
489 return 0;
490
491error_free:
492 kfree(data);
493exit:
494 return err;
495}
496
497static int lm80_detach_client(struct i2c_client *client)
498{
499 int err;
500
501 if ((err = i2c_detach_client(client))) {
502 dev_err(&client->dev, "Client deregistration failed, "
503 "client not detached.\n");
504 return err;
505 }
506
507 kfree(i2c_get_clientdata(client));
508 return 0;
509}
510
511static int lm80_read_value(struct i2c_client *client, u8 reg)
512{
513 return i2c_smbus_read_byte_data(client, reg);
514}
515
516static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
517{
518 return i2c_smbus_write_byte_data(client, reg, value);
519}
520
521/* Called when we have found a new LM80. */
522static void lm80_init_client(struct i2c_client *client)
523{
524 /* Reset all except Watchdog values and last conversion values
525 This sets fan-divs to 2, among others. This makes most other
526 initializations unnecessary */
527 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
528 /* Set 11-bit temperature resolution */
529 lm80_write_value(client, LM80_REG_RES, 0x08);
530
531 /* Start monitoring */
532 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
533}
534
535static struct lm80_data *lm80_update_device(struct device *dev)
536{
537 struct i2c_client *client = to_i2c_client(dev);
538 struct lm80_data *data = i2c_get_clientdata(client);
539 int i;
540
541 down(&data->update_lock);
542
543 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
544 dev_dbg(&client->dev, "Starting lm80 update\n");
545 for (i = 0; i <= 6; i++) {
546 data->in[i] =
547 lm80_read_value(client, LM80_REG_IN(i));
548 data->in_min[i] =
549 lm80_read_value(client, LM80_REG_IN_MIN(i));
550 data->in_max[i] =
551 lm80_read_value(client, LM80_REG_IN_MAX(i));
552 }
553 data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
554 data->fan_min[0] =
555 lm80_read_value(client, LM80_REG_FAN_MIN(1));
556 data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
557 data->fan_min[1] =
558 lm80_read_value(client, LM80_REG_FAN_MIN(2));
559
560 data->temp =
561 (lm80_read_value(client, LM80_REG_TEMP) << 8) |
562 (lm80_read_value(client, LM80_REG_RES) & 0xf0);
563 data->temp_os_max =
564 lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
565 data->temp_os_hyst =
566 lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
567 data->temp_hot_max =
568 lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
569 data->temp_hot_hyst =
570 lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
571
572 i = lm80_read_value(client, LM80_REG_FANDIV);
573 data->fan_div[0] = (i >> 2) & 0x03;
574 data->fan_div[1] = (i >> 4) & 0x03;
575 data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
576 (lm80_read_value(client, LM80_REG_ALARM2) << 8);
577 data->last_updated = jiffies;
578 data->valid = 1;
579 }
580
581 up(&data->update_lock);
582
583 return data;
584}
585
586static int __init sensors_lm80_init(void)
587{
588 return i2c_add_driver(&lm80_driver);
589}
590
591static void __exit sensors_lm80_exit(void)
592{
593 i2c_del_driver(&lm80_driver);
594}
595
596MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
597 "Philip Edelbrock <phil@netroedge.com>");
598MODULE_DESCRIPTION("LM80 driver");
599MODULE_LICENSE("GPL");
600
601module_init(sensors_lm80_init);
602module_exit(sensors_lm80_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-19 03:23:19 -0500