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hwmon: (lm80) fix checkpatch warnings
[mirror_ubuntu-hirsute-kernel.git] / drivers / hwmon / lm80.c
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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 29#include <linux/hwmon.h>
f8181762 30#include <linux/hwmon-sysfs.h>
943b0830 31#include <linux/err.h>
9a61bf63 32#include <linux/mutex.h>
1da177e4
LT		 33
34/* Addresses to scan */
25e9c86d
MH		 35static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
36 0x2e, 0x2f, I2C_CLIENT_END };
1da177e4 37
1da177e4
LT		 38/* Many LM80 constants specified below */
39
40/* The LM80 registers */
41#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
42#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
43#define LM80_REG_IN(nr) (0x20 + (nr))
44
45#define LM80_REG_FAN1 0x28
46#define LM80_REG_FAN2 0x29
47#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
48
49#define LM80_REG_TEMP 0x27
50#define LM80_REG_TEMP_HOT_MAX 0x38
51#define LM80_REG_TEMP_HOT_HYST 0x39
52#define LM80_REG_TEMP_OS_MAX 0x3a
53#define LM80_REG_TEMP_OS_HYST 0x3b
54
55#define LM80_REG_CONFIG 0x00
56#define LM80_REG_ALARM1 0x01
57#define LM80_REG_ALARM2 0x02
58#define LM80_REG_MASK1 0x03
59#define LM80_REG_MASK2 0x04
60#define LM80_REG_FANDIV 0x05
61#define LM80_REG_RES 0x06
62
63
64/* Conversions. Rounding and limit checking is only done on the TO_REG
65 variants. Note that you should be a bit careful with which arguments
66 these macros are called: arguments may be evaluated more than once.
67 Fixing this is just not worth it. */
68
66b3b1f7
FM		 69#define IN_TO_REG(val) (SENSORS_LIMIT(((val) + 5) / 10, 0, 255))
70#define IN_FROM_REG(val) ((val) * 10)
1da177e4
LT		 71
72static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
73{
74 if (rpm == 0)
75 return 255;
76 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
66b3b1f7 77 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
1da177e4
LT		 78}
79
66b3b1f7
FM		 80#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
81 (val) == 255 ? 0 : 1350000/((div) * (val)))
1da177e4
LT		 82
83static inline long TEMP_FROM_REG(u16 temp)
84{
85 long res;
86
87 temp >>= 4;
88 if (temp < 0x0800)
89 res = 625 * (long) temp;
90 else
91 res = ((long) temp - 0x01000) * 625;
92
93 return res / 10;
94}
95
66b3b1f7
FM		 96#define TEMP_LIMIT_FROM_REG(val) (((val) > 0x80 ? \
97 (val) - 0x100 : (val)) * 1000)
1da177e4 98
66b3b1f7
FM		 99#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val) < 0 ? \
100 ((val) - 500) / 1000 : ((val) + 500) / 1000, 0, 255)
1da177e4
LT		 101
102#define DIV_FROM_REG(val) (1 << (val))
103
104/*
105 * Client data (each client gets its own)
106 */
107
108struct lm80_data {
1beeffe4 109 struct device *hwmon_dev;
9a61bf63 110 struct mutex update_lock;
1da177e4
LT		 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
6cc37ee5 128/*
1da177e4
LT		 129 * Functions declaration
130 */
131
8c8bacc8
JD		 132static int lm80_probe(struct i2c_client *client,
133 const struct i2c_device_id *id);
310ec792 134static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
1da177e4 135static void lm80_init_client(struct i2c_client *client);
8c8bacc8 136static int lm80_remove(struct i2c_client *client);
1da177e4
LT		 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
8c8bacc8 145static const struct i2c_device_id lm80_id[] = {
1f86df49 146 { "lm80", 0 },
8c8bacc8
JD		 147 { }
148};
149MODULE_DEVICE_TABLE(i2c, lm80_id);
150
1da177e4 151static struct i2c_driver lm80_driver = {
8c8bacc8 152 .class = I2C_CLASS_HWMON,
cdaf7934 153 .driver = {
cdaf7934
LR		 154 .name = "lm80",
155 },
8c8bacc8
JD		 156 .probe = lm80_probe,
157 .remove = lm80_remove,
158 .id_table = lm80_id,
159 .detect = lm80_detect,
c3813d6a 160 .address_list = normal_i2c,
1da177e4
LT		 161};
162
163/*
164 * Sysfs stuff
165 */
166
167#define show_in(suffix, value) \
66b3b1f7
FM		 168static ssize_t show_in_##suffix(struct device *dev, \
169 struct device_attribute *attr, char *buf) \
1da177e4 170{ \
f8181762 171 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4 172 struct lm80_data *data = lm80_update_device(dev); \
2faaa931
FM		 173 if (IS_ERR(data)) \
174 return PTR_ERR(data); \
f8181762 175 return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
1da177e4 176}
f8181762
JD		 177show_in(min, in_min)
178show_in(max, in_max)
179show_in(input, in)
1da177e4
LT		 180
181#define set_in(suffix, value, reg) \
66b3b1f7
FM		 182static ssize_t set_in_##suffix(struct device *dev, \
183 struct device_attribute *attr, const char *buf, size_t count) \
1da177e4 184{ \
f8181762 185 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4
LT		 186 struct i2c_client *client = to_i2c_client(dev); \
187 struct lm80_data *data = i2c_get_clientdata(client); \
6a9e7c4c
FM		 188 long val; \
189 int err = kstrtol(buf, 10, &val); \
190 if (err < 0) \
191 return err; \
66b3b1f7 192\
9a61bf63 193 mutex_lock(&data->update_lock);\
f8181762
JD		 194 data->value[nr] = IN_TO_REG(val); \
195 lm80_write_value(client, reg(nr), data->value[nr]); \
9a61bf63 196 mutex_unlock(&data->update_lock);\
1da177e4
LT		 197 return count; \
198}
f8181762
JD		 199set_in(min, in_min, LM80_REG_IN_MIN)
200set_in(max, in_max, LM80_REG_IN_MAX)
201
202#define show_fan(suffix, value) \
66b3b1f7
FM		 203static ssize_t show_fan_##suffix(struct device *dev, \
204 struct device_attribute *attr, char *buf) \
1da177e4 205{ \
f8181762 206 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4 207 struct lm80_data *data = lm80_update_device(dev); \
2faaa931
FM		 208 if (IS_ERR(data)) \
209 return PTR_ERR(data); \
f8181762
JD		 210 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
211 DIV_FROM_REG(data->fan_div[nr]))); \
1da177e4 212}
f8181762
JD		 213show_fan(min, fan_min)
214show_fan(input, fan)
1da177e4 215
f8181762
JD		 216static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
217 char *buf)
218{
219 int nr = to_sensor_dev_attr(attr)->index;
220 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 221 if (IS_ERR(data))
222 return PTR_ERR(data);
f8181762 223 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
1da177e4 224}
1da177e4 225
f8181762
JD		 226static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
227 const char *buf, size_t count)
228{
229 int nr = to_sensor_dev_attr(attr)->index;
230 struct i2c_client *client = to_i2c_client(dev);
231 struct lm80_data *data = i2c_get_clientdata(client);
6a9e7c4c
FM		 232 unsigned long val;
233 int err = kstrtoul(buf, 10, &val);
234 if (err < 0)
235 return err;
f8181762
JD		 236
237 mutex_lock(&data->update_lock);
238 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
239 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
240 mutex_unlock(&data->update_lock);
241 return count;
1da177e4 242}
1da177e4
LT		 243
244/* Note: we save and restore the fan minimum here, because its value is
245 determined in part by the fan divisor. This follows the principle of
d6e05edc 246 least surprise; the user doesn't expect the fan minimum to change just
1da177e4 247 because the divisor changed. */
f8181762
JD		 248static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
249 const char *buf, size_t count)
1da177e4 250{
f8181762 251 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 252 struct i2c_client *client = to_i2c_client(dev);
253 struct lm80_data *data = i2c_get_clientdata(client);
6a9e7c4c 254 unsigned long min, val;
1da177e4 255 u8 reg;
6a9e7c4c
FM		 256 int err = kstrtoul(buf, 10, &val);
257 if (err < 0)
258 return err;
1da177e4
LT		 259
260 /* Save fan_min */
9a61bf63 261 mutex_lock(&data->update_lock);
1da177e4
LT		 262 min = FAN_FROM_REG(data->fan_min[nr],
263 DIV_FROM_REG(data->fan_div[nr]));
264
265 switch (val) {
66b3b1f7
FM		 266 case 1:
267 data->fan_div[nr] = 0;
268 break;
269 case 2:
270 data->fan_div[nr] = 1;
271 break;
272 case 4:
273 data->fan_div[nr] = 2;
274 break;
275 case 8:
276 data->fan_div[nr] = 3;
277 break;
1da177e4
LT		 278 default:
279 dev_err(&client->dev, "fan_div value %ld not "
280 "supported. Choose one of 1, 2, 4 or 8!\n", val);
9a61bf63 281 mutex_unlock(&data->update_lock);
1da177e4
LT		 282 return -EINVAL;
283 }
284
285 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
286 | (data->fan_div[nr] << (2 * (nr + 1)));
287 lm80_write_value(client, LM80_REG_FANDIV, reg);
288
289 /* Restore fan_min */
290 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
291 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
9a61bf63 292 mutex_unlock(&data->update_lock);
1da177e4
LT		 293
294 return count;
295}
296
66b3b1f7
FM		 297static ssize_t show_temp_input1(struct device *dev,
298 struct device_attribute *attr, char *buf)
1da177e4
LT		 299{
300 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 301 if (IS_ERR(data))
302 return PTR_ERR(data);
1da177e4
LT		 303 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
304}
305
306#define show_temp(suffix, value) \
66b3b1f7
FM		 307static ssize_t show_temp_##suffix(struct device *dev, \
308 struct device_attribute *attr, char *buf) \
1da177e4
LT		 309{ \
310 struct lm80_data *data = lm80_update_device(dev); \
2faaa931
FM		 311 if (IS_ERR(data)) \
312 return PTR_ERR(data); \
1da177e4
LT		 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) \
66b3b1f7
FM		 321static ssize_t set_temp_##suffix(struct device *dev, \
322 struct device_attribute *attr, const char *buf, size_t count) \
1da177e4
LT		 323{ \
324 struct i2c_client *client = to_i2c_client(dev); \
325 struct lm80_data *data = i2c_get_clientdata(client); \
6a9e7c4c
FM		 326 long val; \
327 int err = kstrtol(buf, 10, &val); \
328 if (err < 0) \
329 return err; \
66b3b1f7 330\
9a61bf63 331 mutex_lock(&data->update_lock); \
1da177e4
LT		 332 data->value = TEMP_LIMIT_TO_REG(val); \
333 lm80_write_value(client, reg, data->value); \
9a61bf63 334 mutex_unlock(&data->update_lock); \
1da177e4
LT		 335 return count; \
336}
337set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
338set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
339set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
340set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
341
6cc37ee5
JD		 342static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
343 char *buf)
1da177e4
LT		 344{
345 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 346 if (IS_ERR(data))
347 return PTR_ERR(data);
1da177e4
LT		 348 return sprintf(buf, "%u\n", data->alarms);
349}
350
e84542f5
JD		 351static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
352 char *buf)
353{
354 int bitnr = to_sensor_dev_attr(attr)->index;
355 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 356 if (IS_ERR(data))
357 return PTR_ERR(data);
e84542f5
JD		 358 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
359}
360
f8181762
JD		 361static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
362 show_in_min, set_in_min, 0);
363static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
364 show_in_min, set_in_min, 1);
365static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
366 show_in_min, set_in_min, 2);
367static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
368 show_in_min, set_in_min, 3);
369static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
370 show_in_min, set_in_min, 4);
371static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
372 show_in_min, set_in_min, 5);
373static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
374 show_in_min, set_in_min, 6);
375static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
376 show_in_max, set_in_max, 0);
377static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
378 show_in_max, set_in_max, 1);
379static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
380 show_in_max, set_in_max, 2);
381static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
382 show_in_max, set_in_max, 3);
383static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
384 show_in_max, set_in_max, 4);
385static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
386 show_in_max, set_in_max, 5);
387static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
388 show_in_max, set_in_max, 6);
389static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
390static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
391static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
392static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
393static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
394static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
395static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
396static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
397 show_fan_min, set_fan_min, 0);
398static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
399 show_fan_min, set_fan_min, 1);
400static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
401static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
402static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
403 show_fan_div, set_fan_div, 0);
404static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
405 show_fan_div, set_fan_div, 1);
1da177e4
LT		 406static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
407static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
66b3b1f7 408 set_temp_hot_max);
1da177e4 409static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
66b3b1f7 410 set_temp_hot_hyst);
1da177e4 411static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
66b3b1f7 412 set_temp_os_max);
1da177e4 413static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
66b3b1f7 414 set_temp_os_hyst);
1da177e4 415static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
e84542f5
JD		 416static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
417static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
418static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
419static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
420static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
421static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
422static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
423static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
424static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
425static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
426static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
1da177e4
LT		 427
428/*
429 * Real code
430 */
431
0501a381 432static struct attribute *lm80_attributes[] = {
f8181762
JD		 433 &sensor_dev_attr_in0_min.dev_attr.attr,
434 &sensor_dev_attr_in1_min.dev_attr.attr,
435 &sensor_dev_attr_in2_min.dev_attr.attr,
436 &sensor_dev_attr_in3_min.dev_attr.attr,
437 &sensor_dev_attr_in4_min.dev_attr.attr,
438 &sensor_dev_attr_in5_min.dev_attr.attr,
439 &sensor_dev_attr_in6_min.dev_attr.attr,
440 &sensor_dev_attr_in0_max.dev_attr.attr,
441 &sensor_dev_attr_in1_max.dev_attr.attr,
442 &sensor_dev_attr_in2_max.dev_attr.attr,
443 &sensor_dev_attr_in3_max.dev_attr.attr,
444 &sensor_dev_attr_in4_max.dev_attr.attr,
445 &sensor_dev_attr_in5_max.dev_attr.attr,
446 &sensor_dev_attr_in6_max.dev_attr.attr,
447 &sensor_dev_attr_in0_input.dev_attr.attr,
448 &sensor_dev_attr_in1_input.dev_attr.attr,
449 &sensor_dev_attr_in2_input.dev_attr.attr,
450 &sensor_dev_attr_in3_input.dev_attr.attr,
451 &sensor_dev_attr_in4_input.dev_attr.attr,
452 &sensor_dev_attr_in5_input.dev_attr.attr,
453 &sensor_dev_attr_in6_input.dev_attr.attr,
454 &sensor_dev_attr_fan1_min.dev_attr.attr,
455 &sensor_dev_attr_fan2_min.dev_attr.attr,
456 &sensor_dev_attr_fan1_input.dev_attr.attr,
457 &sensor_dev_attr_fan2_input.dev_attr.attr,
458 &sensor_dev_attr_fan1_div.dev_attr.attr,
459 &sensor_dev_attr_fan2_div.dev_attr.attr,
0501a381
MH		 460 &dev_attr_temp1_input.attr,
461 &dev_attr_temp1_max.attr,
462 &dev_attr_temp1_max_hyst.attr,
463 &dev_attr_temp1_crit.attr,
464 &dev_attr_temp1_crit_hyst.attr,
465 &dev_attr_alarms.attr,
e84542f5
JD		 466 &sensor_dev_attr_in0_alarm.dev_attr.attr,
467 &sensor_dev_attr_in1_alarm.dev_attr.attr,
468 &sensor_dev_attr_in2_alarm.dev_attr.attr,
469 &sensor_dev_attr_in3_alarm.dev_attr.attr,
470 &sensor_dev_attr_in4_alarm.dev_attr.attr,
471 &sensor_dev_attr_in5_alarm.dev_attr.attr,
472 &sensor_dev_attr_in6_alarm.dev_attr.attr,
473 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
474 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
475 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
476 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
0501a381
MH		 477 NULL
478};
479
480static const struct attribute_group lm80_group = {
481 .attrs = lm80_attributes,
482};
483
8c8bacc8 484/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 485static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 486{
8c8bacc8 487 struct i2c_adapter *adapter = client->adapter;
1da177e4 488 int i, cur;
1da177e4
LT		 489
490 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
8c8bacc8 491 return -ENODEV;
1da177e4
LT		 492
493 /* Now, we do the remaining detection. It is lousy. */
6cc37ee5 494 if (lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
8c8bacc8 495 return -ENODEV;
1da177e4 496 for (i = 0x2a; i <= 0x3d; i++) {
6cc37ee5
JD		 497 cur = i2c_smbus_read_byte_data(client, i);
498 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
499 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
500 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
66b3b1f7 501 return -ENODEV;
1da177e4
LT		 502 }
503
8c8bacc8 504 strlcpy(info->type, "lm80", I2C_NAME_SIZE);
1da177e4 505
8c8bacc8
JD		 506 return 0;
507}
1da177e4 508
8c8bacc8
JD		 509static int lm80_probe(struct i2c_client *client,
510 const struct i2c_device_id *id)
511{
512 struct lm80_data *data;
513 int err;
514
515 data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL);
516 if (!data) {
517 err = -ENOMEM;
518 goto exit;
519 }
520
521 i2c_set_clientdata(client, data);
522 mutex_init(&data->update_lock);
1da177e4
LT		 523
524 /* Initialize the LM80 chip */
6cc37ee5 525 lm80_init_client(client);
1da177e4
LT		 526
527 /* A few vars need to be filled upon startup */
6cc37ee5
JD		 528 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
529 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
1da177e4
LT		 530
531 /* Register sysfs hooks */
66b3b1f7
FM		 532 err = sysfs_create_group(&client->dev.kobj, &lm80_group);
533 if (err)
8c8bacc8 534 goto error_free;
0501a381 535
6cc37ee5 536 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 537 if (IS_ERR(data->hwmon_dev)) {
538 err = PTR_ERR(data->hwmon_dev);
0501a381 539 goto error_remove;
943b0830
MH		 540 }
541
1da177e4
LT		 542 return 0;
543
0501a381 544error_remove:
6cc37ee5 545 sysfs_remove_group(&client->dev.kobj, &lm80_group);
1da177e4
LT		 546error_free:
547 kfree(data);
548exit:
549 return err;
550}
551
8c8bacc8 552static int lm80_remove(struct i2c_client *client)
1da177e4 553{
943b0830 554 struct lm80_data *data = i2c_get_clientdata(client);
1da177e4 555
1beeffe4 556 hwmon_device_unregister(data->hwmon_dev);
0501a381 557 sysfs_remove_group(&client->dev.kobj, &lm80_group);
1da177e4 558
943b0830 559 kfree(data);
1da177e4
LT		 560 return 0;
561}
562
563static int lm80_read_value(struct i2c_client *client, u8 reg)
564{
565 return i2c_smbus_read_byte_data(client, reg);
566}
567
568static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
569{
570 return i2c_smbus_write_byte_data(client, reg, value);
571}
572
573/* Called when we have found a new LM80. */
574static void lm80_init_client(struct i2c_client *client)
575{
576 /* Reset all except Watchdog values and last conversion values
577 This sets fan-divs to 2, among others. This makes most other
578 initializations unnecessary */
579 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
580 /* Set 11-bit temperature resolution */
581 lm80_write_value(client, LM80_REG_RES, 0x08);
582
583 /* Start monitoring */
584 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
585}
586
587static struct lm80_data *lm80_update_device(struct device *dev)
588{
589 struct i2c_client *client = to_i2c_client(dev);
590 struct lm80_data *data = i2c_get_clientdata(client);
591 int i;
2faaa931
FM		 592 int rv;
593 int prev_rv;
594 struct lm80_data *ret = data;
1da177e4 595
9a61bf63 596 mutex_lock(&data->update_lock);
1da177e4
LT		 597
598 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
599 dev_dbg(&client->dev, "Starting lm80 update\n");
600 for (i = 0; i <= 6; i++) {
2faaa931
FM		 601 rv = lm80_read_value(client, LM80_REG_IN(i));
602 if (rv < 0)
603 goto abort;
604 data->in[i] = rv;
605
606 rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
607 if (rv < 0)
608 goto abort;
609 data->in_min[i] = rv;
610
611 rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
612 if (rv < 0)
613 goto abort;
614 data->in_max[i] = rv;
1da177e4 615 }
2faaa931
FM		 616
617 rv = lm80_read_value(client, LM80_REG_FAN1);
618 if (rv < 0)
619 goto abort;
620 data->fan[0] = rv;
621
622 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
623 if (rv < 0)
624 goto abort;
625 data->fan_min[0] = rv;
626
627 rv = lm80_read_value(client, LM80_REG_FAN2);
628 if (rv < 0)
629 goto abort;
630 data->fan[1] = rv;
631
632 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
633 if (rv < 0)
634 goto abort;
635 data->fan_min[1] = rv;
636
637 prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
638 if (rv < 0)
639 goto abort;
640 rv = lm80_read_value(client, LM80_REG_RES);
641 if (rv < 0)
642 goto abort;
643 data->temp = (prev_rv << 8) | (rv & 0xf0);
644
645 rv = lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
646 if (rv < 0)
647 goto abort;
648 data->temp_os_max = rv;
649
650 rv = lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
651 if (rv < 0)
652 goto abort;
653 data->temp_os_hyst = rv;
654
655 rv = lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
656 if (rv < 0)
657 goto abort;
658 data->temp_hot_max = rv;
659
660 rv = lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
661 if (rv < 0)
662 goto abort;
663 data->temp_hot_hyst = rv;
664
665 rv = lm80_read_value(client, LM80_REG_FANDIV);
666 if (rv < 0)
667 goto abort;
668 data->fan_div[0] = (rv >> 2) & 0x03;
669 data->fan_div[1] = (rv >> 4) & 0x03;
670
671 prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
672 if (rv < 0)
673 goto abort;
674 rv = lm80_read_value(client, LM80_REG_ALARM2);
675 if (rv < 0)
676 goto abort;
677 data->alarms = prev_rv + (rv << 8);
678
1da177e4
LT		 679 data->last_updated = jiffies;
680 data->valid = 1;
681 }
2faaa931
FM		 682 goto done;
683
684abort:
685 ret = ERR_PTR(rv);
686 data->valid = 0;
1da177e4 687
2faaa931 688done:
9a61bf63 689 mutex_unlock(&data->update_lock);
1da177e4 690
2faaa931 691 return ret;
1da177e4
LT		 692}
693
694static int __init sensors_lm80_init(void)
695{
696 return i2c_add_driver(&lm80_driver);
697}
698
699static void __exit sensors_lm80_exit(void)
700{
701 i2c_del_driver(&lm80_driver);
702}
703
704MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
705 "Philip Edelbrock <phil@netroedge.com>");
706MODULE_DESCRIPTION("LM80 driver");
707MODULE_LICENSE("GPL");
708
709module_init(sensors_lm80_init);
710module_exit(sensors_lm80_exit);
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