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hwmon: New coretemp driver
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hwmon / lm80.c
CommitLineData
1da177e4
LT		 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
1da177e4
LT		 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>
943b0830
MH		 29#include <linux/hwmon.h>
30#include <linux/err.h>
9a61bf63 31#include <linux/mutex.h>
1da177e4
LT		 32
33/* Addresses to scan */
34static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c,
35 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
1da177e4
LT		 36
37/* Insmod parameters */
f4b50261 38I2C_CLIENT_INSMOD_1(lm80);
1da177e4
LT		 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;
943b0830 111 struct class_device *class_dev;
9a61bf63 112 struct mutex update_lock;
1da177e4
LT		 113 char valid; /* !=0 if following fields are valid */
114 unsigned long last_updated; /* In jiffies */
115
116 u8 in[7]; /* Register value */
117 u8 in_max[7]; /* Register value */
118 u8 in_min[7]; /* Register value */
119 u8 fan[2]; /* Register value */
120 u8 fan_min[2]; /* Register value */
121 u8 fan_div[2]; /* Register encoding, shifted right */
122 u16 temp; /* Register values, shifted right */
123 u8 temp_hot_max; /* Register value */
124 u8 temp_hot_hyst; /* Register value */
125 u8 temp_os_max; /* Register value */
126 u8 temp_os_hyst; /* Register value */
127 u16 alarms; /* Register encoding, combined */
128};
129
130/*
131 * Functions declaration
132 */
133
134static int lm80_attach_adapter(struct i2c_adapter *adapter);
135static int lm80_detect(struct i2c_adapter *adapter, int address, int kind);
136static void lm80_init_client(struct i2c_client *client);
137static int lm80_detach_client(struct i2c_client *client);
138static struct lm80_data *lm80_update_device(struct device *dev);
139static int lm80_read_value(struct i2c_client *client, u8 reg);
140static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
141
142/*
143 * Driver data (common to all clients)
144 */
145
146static struct i2c_driver lm80_driver = {
cdaf7934 147 .driver = {
cdaf7934
LR		 148 .name = "lm80",
149 },
1da177e4 150 .id = I2C_DRIVERID_LM80,
1da177e4
LT		 151 .attach_adapter = lm80_attach_adapter,
152 .detach_client = lm80_detach_client,
153};
154
155/*
156 * Sysfs stuff
157 */
158
159#define show_in(suffix, value) \
8627f9ba 160static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 161{ \
162 struct lm80_data *data = lm80_update_device(dev); \
163 return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \
164}
165show_in(min0, in_min[0]);
166show_in(min1, in_min[1]);
167show_in(min2, in_min[2]);
168show_in(min3, in_min[3]);
169show_in(min4, in_min[4]);
170show_in(min5, in_min[5]);
171show_in(min6, in_min[6]);
172show_in(max0, in_max[0]);
173show_in(max1, in_max[1]);
174show_in(max2, in_max[2]);
175show_in(max3, in_max[3]);
176show_in(max4, in_max[4]);
177show_in(max5, in_max[5]);
178show_in(max6, in_max[6]);
179show_in(input0, in[0]);
180show_in(input1, in[1]);
181show_in(input2, in[2]);
182show_in(input3, in[3]);
183show_in(input4, in[4]);
184show_in(input5, in[5]);
185show_in(input6, in[6]);
186
187#define set_in(suffix, value, reg) \
8627f9ba 188static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 189 size_t count) \
190{ \
191 struct i2c_client *client = to_i2c_client(dev); \
192 struct lm80_data *data = i2c_get_clientdata(client); \
193 long val = simple_strtol(buf, NULL, 10); \
194 \
9a61bf63 195 mutex_lock(&data->update_lock);\
1da177e4
LT		 196 data->value = IN_TO_REG(val); \
197 lm80_write_value(client, reg, data->value); \
9a61bf63 198 mutex_unlock(&data->update_lock);\
1da177e4
LT		 199 return count; \
200}
201set_in(min0, in_min[0], LM80_REG_IN_MIN(0));
202set_in(min1, in_min[1], LM80_REG_IN_MIN(1));
203set_in(min2, in_min[2], LM80_REG_IN_MIN(2));
204set_in(min3, in_min[3], LM80_REG_IN_MIN(3));
205set_in(min4, in_min[4], LM80_REG_IN_MIN(4));
206set_in(min5, in_min[5], LM80_REG_IN_MIN(5));
207set_in(min6, in_min[6], LM80_REG_IN_MIN(6));
208set_in(max0, in_max[0], LM80_REG_IN_MAX(0));
209set_in(max1, in_max[1], LM80_REG_IN_MAX(1));
210set_in(max2, in_max[2], LM80_REG_IN_MAX(2));
211set_in(max3, in_max[3], LM80_REG_IN_MAX(3));
212set_in(max4, in_max[4], LM80_REG_IN_MAX(4));
213set_in(max5, in_max[5], LM80_REG_IN_MAX(5));
214set_in(max6, in_max[6], LM80_REG_IN_MAX(6));
215
216#define show_fan(suffix, value, div) \
8627f9ba 217static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 218{ \
219 struct lm80_data *data = lm80_update_device(dev); \
220 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \
221 DIV_FROM_REG(data->div))); \
222}
223show_fan(min1, fan_min[0], fan_div[0]);
224show_fan(min2, fan_min[1], fan_div[1]);
225show_fan(input1, fan[0], fan_div[0]);
226show_fan(input2, fan[1], fan_div[1]);
227
228#define show_fan_div(suffix, value) \
8627f9ba 229static ssize_t show_fan_div##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 230{ \
231 struct lm80_data *data = lm80_update_device(dev); \
232 return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \
233}
234show_fan_div(1, fan_div[0]);
235show_fan_div(2, fan_div[1]);
236
237#define set_fan(suffix, value, reg, div) \
8627f9ba 238static ssize_t set_fan_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 239 size_t count) \
240{ \
241 struct i2c_client *client = to_i2c_client(dev); \
242 struct lm80_data *data = i2c_get_clientdata(client); \
243 long val = simple_strtoul(buf, NULL, 10); \
244 \
9a61bf63 245 mutex_lock(&data->update_lock);\
1da177e4
LT		 246 data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \
247 lm80_write_value(client, reg, data->value); \
9a61bf63 248 mutex_unlock(&data->update_lock);\
1da177e4
LT		 249 return count; \
250}
251set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]);
252set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]);
253
254/* Note: we save and restore the fan minimum here, because its value is
255 determined in part by the fan divisor. This follows the principle of
d6e05edc 256 least surprise; the user doesn't expect the fan minimum to change just
1da177e4
LT		 257 because the divisor changed. */
258static ssize_t set_fan_div(struct device *dev, const char *buf,
259 size_t count, int nr)
260{
261 struct i2c_client *client = to_i2c_client(dev);
262 struct lm80_data *data = i2c_get_clientdata(client);
263 unsigned long min, val = simple_strtoul(buf, NULL, 10);
264 u8 reg;
265
266 /* Save fan_min */
9a61bf63 267 mutex_lock(&data->update_lock);
1da177e4
LT		 268 min = FAN_FROM_REG(data->fan_min[nr],
269 DIV_FROM_REG(data->fan_div[nr]));
270
271 switch (val) {
272 case 1: data->fan_div[nr] = 0; break;
273 case 2: data->fan_div[nr] = 1; break;
274 case 4: data->fan_div[nr] = 2; break;
275 case 8: data->fan_div[nr] = 3; break;
276 default:
277 dev_err(&client->dev, "fan_div value %ld not "
278 "supported. Choose one of 1, 2, 4 or 8!\n", val);
9a61bf63 279 mutex_unlock(&data->update_lock);
1da177e4
LT		 280 return -EINVAL;
281 }
282
283 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
284 | (data->fan_div[nr] << (2 * (nr + 1)));
285 lm80_write_value(client, LM80_REG_FANDIV, reg);
286
287 /* Restore fan_min */
288 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
289 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
9a61bf63 290 mutex_unlock(&data->update_lock);
1da177e4
LT		 291
292 return count;
293}
294
295#define set_fan_div(number) \
8627f9ba 296static ssize_t set_fan_div##number(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 297 size_t count) \
298{ \
299 return set_fan_div(dev, buf, count, number - 1); \
300}
301set_fan_div(1);
302set_fan_div(2);
303
8627f9ba 304static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 305{
306 struct lm80_data *data = lm80_update_device(dev);
307 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
308}
309
310#define show_temp(suffix, value) \
8627f9ba 311static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 312{ \
313 struct lm80_data *data = lm80_update_device(dev); \
314 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
315}
316show_temp(hot_max, temp_hot_max);
317show_temp(hot_hyst, temp_hot_hyst);
318show_temp(os_max, temp_os_max);
319show_temp(os_hyst, temp_os_hyst);
320
321#define set_temp(suffix, value, reg) \
8627f9ba 322static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 323 size_t count) \
324{ \
325 struct i2c_client *client = to_i2c_client(dev); \
326 struct lm80_data *data = i2c_get_clientdata(client); \
327 long val = simple_strtoul(buf, NULL, 10); \
328 \
9a61bf63 329 mutex_lock(&data->update_lock); \
1da177e4
LT		 330 data->value = TEMP_LIMIT_TO_REG(val); \
331 lm80_write_value(client, reg, data->value); \
9a61bf63 332 mutex_unlock(&data->update_lock); \
1da177e4
LT		 333 return count; \
334}
335set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
336set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
337set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
338set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
339
8627f9ba 340static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 341{
342 struct lm80_data *data = lm80_update_device(dev);
343 return sprintf(buf, "%u\n", data->alarms);
344}
345
346static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0);
347static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1);
348static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2);
349static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3);
350static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4);
351static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5);
352static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6);
353static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0);
354static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1);
355static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2);
356static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3);
357static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4);
358static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5);
359static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6);
360static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
361static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
362static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
363static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
364static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL);
365static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL);
366static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL);
367static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1,
368 set_fan_min1);
369static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2,
370 set_fan_min2);
371static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL);
372static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL);
373static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1);
374static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2);
375static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
376static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
377 set_temp_hot_max);
378static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
379 set_temp_hot_hyst);
380static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
381 set_temp_os_max);
382static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
383 set_temp_os_hyst);
384static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
385
386/*
387 * Real code
388 */
389
390static int lm80_attach_adapter(struct i2c_adapter *adapter)
391{
392 if (!(adapter->class & I2C_CLASS_HWMON))
393 return 0;
2ed2dc3c 394 return i2c_probe(adapter, &addr_data, lm80_detect);
1da177e4
LT		 395}
396
0501a381
MH		 397static struct attribute *lm80_attributes[] = {
398 &dev_attr_in0_min.attr,
399 &dev_attr_in1_min.attr,
400 &dev_attr_in2_min.attr,
401 &dev_attr_in3_min.attr,
402 &dev_attr_in4_min.attr,
403 &dev_attr_in5_min.attr,
404 &dev_attr_in6_min.attr,
405 &dev_attr_in0_max.attr,
406 &dev_attr_in1_max.attr,
407 &dev_attr_in2_max.attr,
408 &dev_attr_in3_max.attr,
409 &dev_attr_in4_max.attr,
410 &dev_attr_in5_max.attr,
411 &dev_attr_in6_max.attr,
412 &dev_attr_in0_input.attr,
413 &dev_attr_in1_input.attr,
414 &dev_attr_in2_input.attr,
415 &dev_attr_in3_input.attr,
416 &dev_attr_in4_input.attr,
417 &dev_attr_in5_input.attr,
418 &dev_attr_in6_input.attr,
419 &dev_attr_fan1_min.attr,
420 &dev_attr_fan2_min.attr,
421 &dev_attr_fan1_input.attr,
422 &dev_attr_fan2_input.attr,
423 &dev_attr_fan1_div.attr,
424 &dev_attr_fan2_div.attr,
425 &dev_attr_temp1_input.attr,
426 &dev_attr_temp1_max.attr,
427 &dev_attr_temp1_max_hyst.attr,
428 &dev_attr_temp1_crit.attr,
429 &dev_attr_temp1_crit_hyst.attr,
430 &dev_attr_alarms.attr,
431
432 NULL
433};
434
435static const struct attribute_group lm80_group = {
436 .attrs = lm80_attributes,
437};
438
c49efcef 439static int lm80_detect(struct i2c_adapter *adapter, int address, int kind)
1da177e4
LT		 440{
441 int i, cur;
442 struct i2c_client *new_client;
443 struct lm80_data *data;
444 int err = 0;
445 const char *name;
446
447 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
448 goto exit;
449
450 /* OK. For now, we presume we have a valid client. We now create the
451 client structure, even though we cannot fill it completely yet.
452 But it allows us to access lm80_{read,write}_value. */
ba9c2e8d 453 if (!(data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL))) {
1da177e4
LT		 454 err = -ENOMEM;
455 goto exit;
456 }
1da177e4
LT		 457
458 new_client = &data->client;
459 i2c_set_clientdata(new_client, data);
460 new_client->addr = address;
461 new_client->adapter = adapter;
462 new_client->driver = &lm80_driver;
463 new_client->flags = 0;
464
465 /* Now, we do the remaining detection. It is lousy. */
466 if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0)
467 goto error_free;
468 for (i = 0x2a; i <= 0x3d; i++) {
469 cur = i2c_smbus_read_byte_data(new_client, i);
470 if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur)
471 || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur)
472 || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur))
473 goto error_free;
474 }
475
476 /* Determine the chip type - only one kind supported! */
477 kind = lm80;
478 name = "lm80";
479
480 /* Fill in the remaining client fields and put it into the global list */
481 strlcpy(new_client->name, name, I2C_NAME_SIZE);
482 data->valid = 0;
9a61bf63 483 mutex_init(&data->update_lock);
1da177e4
LT		 484
485 /* Tell the I2C layer a new client has arrived */
486 if ((err = i2c_attach_client(new_client)))
487 goto error_free;
488
489 /* Initialize the LM80 chip */
490 lm80_init_client(new_client);
491
492 /* A few vars need to be filled upon startup */
493 data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1));
494 data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2));
495
496 /* Register sysfs hooks */
0501a381
MH		 497 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm80_group)))
498 goto error_detach;
499
943b0830
MH		 500 data->class_dev = hwmon_device_register(&new_client->dev);
501 if (IS_ERR(data->class_dev)) {
502 err = PTR_ERR(data->class_dev);
0501a381 503 goto error_remove;
943b0830
MH		 504 }
505
1da177e4
LT		 506 return 0;
507
0501a381
MH		 508error_remove:
509 sysfs_remove_group(&new_client->dev.kobj, &lm80_group);
943b0830
MH		 510error_detach:
511 i2c_detach_client(new_client);
1da177e4
LT		 512error_free:
513 kfree(data);
514exit:
515 return err;
516}
517
518static int lm80_detach_client(struct i2c_client *client)
519{
943b0830 520 struct lm80_data *data = i2c_get_clientdata(client);
1da177e4
LT		 521 int err;
522
943b0830 523 hwmon_device_unregister(data->class_dev);
0501a381 524 sysfs_remove_group(&client->dev.kobj, &lm80_group);
7bef5594 525 if ((err = i2c_detach_client(client)))
1da177e4 526 return err;
1da177e4 527
943b0830 528 kfree(data);
1da177e4
LT		 529 return 0;
530}
531
532static int lm80_read_value(struct i2c_client *client, u8 reg)
533{
534 return i2c_smbus_read_byte_data(client, reg);
535}
536
537static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
538{
539 return i2c_smbus_write_byte_data(client, reg, value);
540}
541
542/* Called when we have found a new LM80. */
543static void lm80_init_client(struct i2c_client *client)
544{
545 /* Reset all except Watchdog values and last conversion values
546 This sets fan-divs to 2, among others. This makes most other
547 initializations unnecessary */
548 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
549 /* Set 11-bit temperature resolution */
550 lm80_write_value(client, LM80_REG_RES, 0x08);
551
552 /* Start monitoring */
553 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
554}
555
556static struct lm80_data *lm80_update_device(struct device *dev)
557{
558 struct i2c_client *client = to_i2c_client(dev);
559 struct lm80_data *data = i2c_get_clientdata(client);
560 int i;
561
9a61bf63 562 mutex_lock(&data->update_lock);
1da177e4
LT		 563
564 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
565 dev_dbg(&client->dev, "Starting lm80 update\n");
566 for (i = 0; i <= 6; i++) {
567 data->in[i] =
568 lm80_read_value(client, LM80_REG_IN(i));
569 data->in_min[i] =
570 lm80_read_value(client, LM80_REG_IN_MIN(i));
571 data->in_max[i] =
572 lm80_read_value(client, LM80_REG_IN_MAX(i));
573 }
574 data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
575 data->fan_min[0] =
576 lm80_read_value(client, LM80_REG_FAN_MIN(1));
577 data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
578 data->fan_min[1] =
579 lm80_read_value(client, LM80_REG_FAN_MIN(2));
580
581 data->temp =
582 (lm80_read_value(client, LM80_REG_TEMP) << 8) |
583 (lm80_read_value(client, LM80_REG_RES) & 0xf0);
584 data->temp_os_max =
585 lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
586 data->temp_os_hyst =
587 lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
588 data->temp_hot_max =
589 lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
590 data->temp_hot_hyst =
591 lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
592
593 i = lm80_read_value(client, LM80_REG_FANDIV);
594 data->fan_div[0] = (i >> 2) & 0x03;
595 data->fan_div[1] = (i >> 4) & 0x03;
596 data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
597 (lm80_read_value(client, LM80_REG_ALARM2) << 8);
598 data->last_updated = jiffies;
599 data->valid = 1;
600 }
601
9a61bf63 602 mutex_unlock(&data->update_lock);
1da177e4
LT		 603
604 return data;
605}
606
607static int __init sensors_lm80_init(void)
608{
609 return i2c_add_driver(&lm80_driver);
610}
611
612static void __exit sensors_lm80_exit(void)
613{
614 i2c_del_driver(&lm80_driver);
615}
616
617MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
618 "Philip Edelbrock <phil@netroedge.com>");
619MODULE_DESCRIPTION("LM80 driver");
620MODULE_LICENSE("GPL");
621
622module_init(sensors_lm80_init);
623module_exit(sensors_lm80_exit);
kernel source for telekom puls (alcatel/mediatek)