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hwmon: convert drivers/hwmon/* to use module_i2c_driver()
[mirror_ubuntu-bionic-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;
96585f1a 111 char error; /* !=0 if error occurred during last update */
1da177e4
LT		 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
6cc37ee5 129/*
1da177e4
LT		 130 * Functions declaration
131 */
132
8c8bacc8
JD		 133static int lm80_probe(struct i2c_client *client,
134 const struct i2c_device_id *id);
310ec792 135static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
1da177e4 136static void lm80_init_client(struct i2c_client *client);
8c8bacc8 137static int lm80_remove(struct i2c_client *client);
1da177e4
LT		 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
8c8bacc8 146static const struct i2c_device_id lm80_id[] = {
1f86df49 147 { "lm80", 0 },
8c8bacc8
JD		 148 { }
149};
150MODULE_DEVICE_TABLE(i2c, lm80_id);
151
1da177e4 152static struct i2c_driver lm80_driver = {
8c8bacc8 153 .class = I2C_CLASS_HWMON,
cdaf7934 154 .driver = {
cdaf7934
LR		 155 .name = "lm80",
156 },
8c8bacc8
JD		 157 .probe = lm80_probe,
158 .remove = lm80_remove,
159 .id_table = lm80_id,
160 .detect = lm80_detect,
c3813d6a 161 .address_list = normal_i2c,
1da177e4
LT		 162};
163
164/*
165 * Sysfs stuff
166 */
167
168#define show_in(suffix, value) \
66b3b1f7
FM		 169static ssize_t show_in_##suffix(struct device *dev, \
170 struct device_attribute *attr, char *buf) \
1da177e4 171{ \
f8181762 172 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4 173 struct lm80_data *data = lm80_update_device(dev); \
2faaa931
FM		 174 if (IS_ERR(data)) \
175 return PTR_ERR(data); \
f8181762 176 return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
1da177e4 177}
f8181762
JD		 178show_in(min, in_min)
179show_in(max, in_max)
180show_in(input, in)
1da177e4
LT		 181
182#define set_in(suffix, value, reg) \
66b3b1f7
FM		 183static ssize_t set_in_##suffix(struct device *dev, \
184 struct device_attribute *attr, const char *buf, size_t count) \
1da177e4 185{ \
f8181762 186 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4
LT		 187 struct i2c_client *client = to_i2c_client(dev); \
188 struct lm80_data *data = i2c_get_clientdata(client); \
6a9e7c4c
FM		 189 long val; \
190 int err = kstrtol(buf, 10, &val); \
191 if (err < 0) \
192 return err; \
66b3b1f7 193\
9a61bf63 194 mutex_lock(&data->update_lock);\
f8181762
JD		 195 data->value[nr] = IN_TO_REG(val); \
196 lm80_write_value(client, reg(nr), data->value[nr]); \
9a61bf63 197 mutex_unlock(&data->update_lock);\
1da177e4
LT		 198 return count; \
199}
f8181762
JD		 200set_in(min, in_min, LM80_REG_IN_MIN)
201set_in(max, in_max, LM80_REG_IN_MAX)
202
203#define show_fan(suffix, value) \
66b3b1f7
FM		 204static ssize_t show_fan_##suffix(struct device *dev, \
205 struct device_attribute *attr, char *buf) \
1da177e4 206{ \
f8181762 207 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4 208 struct lm80_data *data = lm80_update_device(dev); \
2faaa931
FM		 209 if (IS_ERR(data)) \
210 return PTR_ERR(data); \
f8181762
JD		 211 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
212 DIV_FROM_REG(data->fan_div[nr]))); \
1da177e4 213}
f8181762
JD		 214show_fan(min, fan_min)
215show_fan(input, fan)
1da177e4 216
f8181762
JD		 217static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
218 char *buf)
219{
220 int nr = to_sensor_dev_attr(attr)->index;
221 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 222 if (IS_ERR(data))
223 return PTR_ERR(data);
f8181762 224 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
1da177e4 225}
1da177e4 226
f8181762
JD		 227static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
228 const char *buf, size_t count)
229{
230 int nr = to_sensor_dev_attr(attr)->index;
231 struct i2c_client *client = to_i2c_client(dev);
232 struct lm80_data *data = i2c_get_clientdata(client);
6a9e7c4c
FM		 233 unsigned long val;
234 int err = kstrtoul(buf, 10, &val);
235 if (err < 0)
236 return err;
f8181762
JD		 237
238 mutex_lock(&data->update_lock);
239 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
240 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
241 mutex_unlock(&data->update_lock);
242 return count;
1da177e4 243}
1da177e4
LT		 244
245/* Note: we save and restore the fan minimum here, because its value is
246 determined in part by the fan divisor. This follows the principle of
d6e05edc 247 least surprise; the user doesn't expect the fan minimum to change just
1da177e4 248 because the divisor changed. */
f8181762
JD		 249static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
250 const char *buf, size_t count)
1da177e4 251{
f8181762 252 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 253 struct i2c_client *client = to_i2c_client(dev);
254 struct lm80_data *data = i2c_get_clientdata(client);
6a9e7c4c 255 unsigned long min, val;
1da177e4 256 u8 reg;
6a9e7c4c
FM		 257 int err = kstrtoul(buf, 10, &val);
258 if (err < 0)
259 return err;
1da177e4
LT		 260
261 /* Save fan_min */
9a61bf63 262 mutex_lock(&data->update_lock);
1da177e4
LT		 263 min = FAN_FROM_REG(data->fan_min[nr],
264 DIV_FROM_REG(data->fan_div[nr]));
265
266 switch (val) {
66b3b1f7
FM		 267 case 1:
268 data->fan_div[nr] = 0;
269 break;
270 case 2:
271 data->fan_div[nr] = 1;
272 break;
273 case 4:
274 data->fan_div[nr] = 2;
275 break;
276 case 8:
277 data->fan_div[nr] = 3;
278 break;
1da177e4
LT		 279 default:
280 dev_err(&client->dev, "fan_div value %ld not "
281 "supported. Choose one of 1, 2, 4 or 8!\n", val);
9a61bf63 282 mutex_unlock(&data->update_lock);
1da177e4
LT		 283 return -EINVAL;
284 }
285
286 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
287 | (data->fan_div[nr] << (2 * (nr + 1)));
288 lm80_write_value(client, LM80_REG_FANDIV, reg);
289
290 /* Restore fan_min */
291 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
292 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
9a61bf63 293 mutex_unlock(&data->update_lock);
1da177e4
LT		 294
295 return count;
296}
297
66b3b1f7
FM		 298static ssize_t show_temp_input1(struct device *dev,
299 struct device_attribute *attr, char *buf)
1da177e4
LT		 300{
301 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 302 if (IS_ERR(data))
303 return PTR_ERR(data);
1da177e4
LT		 304 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
305}
306
307#define show_temp(suffix, value) \
66b3b1f7
FM		 308static ssize_t show_temp_##suffix(struct device *dev, \
309 struct device_attribute *attr, char *buf) \
1da177e4
LT		 310{ \
311 struct lm80_data *data = lm80_update_device(dev); \
2faaa931
FM		 312 if (IS_ERR(data)) \
313 return PTR_ERR(data); \
1da177e4
LT		 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) \
66b3b1f7
FM		 322static ssize_t set_temp_##suffix(struct device *dev, \
323 struct device_attribute *attr, const char *buf, size_t count) \
1da177e4
LT		 324{ \
325 struct i2c_client *client = to_i2c_client(dev); \
326 struct lm80_data *data = i2c_get_clientdata(client); \
6a9e7c4c
FM		 327 long val; \
328 int err = kstrtol(buf, 10, &val); \
329 if (err < 0) \
330 return err; \
66b3b1f7 331\
9a61bf63 332 mutex_lock(&data->update_lock); \
1da177e4
LT		 333 data->value = TEMP_LIMIT_TO_REG(val); \
334 lm80_write_value(client, reg, data->value); \
9a61bf63 335 mutex_unlock(&data->update_lock); \
1da177e4
LT		 336 return count; \
337}
338set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
339set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
340set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
341set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
342
6cc37ee5
JD		 343static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
344 char *buf)
1da177e4
LT		 345{
346 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 347 if (IS_ERR(data))
348 return PTR_ERR(data);
1da177e4
LT		 349 return sprintf(buf, "%u\n", data->alarms);
350}
351
e84542f5
JD		 352static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
353 char *buf)
354{
355 int bitnr = to_sensor_dev_attr(attr)->index;
356 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 357 if (IS_ERR(data))
358 return PTR_ERR(data);
e84542f5
JD		 359 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
360}
361
f8181762
JD		 362static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
363 show_in_min, set_in_min, 0);
364static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
365 show_in_min, set_in_min, 1);
366static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
367 show_in_min, set_in_min, 2);
368static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
369 show_in_min, set_in_min, 3);
370static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
371 show_in_min, set_in_min, 4);
372static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
373 show_in_min, set_in_min, 5);
374static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
375 show_in_min, set_in_min, 6);
376static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
377 show_in_max, set_in_max, 0);
378static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
379 show_in_max, set_in_max, 1);
380static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
381 show_in_max, set_in_max, 2);
382static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
383 show_in_max, set_in_max, 3);
384static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
385 show_in_max, set_in_max, 4);
386static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
387 show_in_max, set_in_max, 5);
388static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
389 show_in_max, set_in_max, 6);
390static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
391static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
392static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
393static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
394static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
395static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
396static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
397static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
398 show_fan_min, set_fan_min, 0);
399static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
400 show_fan_min, set_fan_min, 1);
401static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
402static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
403static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
404 show_fan_div, set_fan_div, 0);
405static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
406 show_fan_div, set_fan_div, 1);
1da177e4
LT		 407static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
408static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
66b3b1f7 409 set_temp_hot_max);
1da177e4 410static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
66b3b1f7 411 set_temp_hot_hyst);
1da177e4 412static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
66b3b1f7 413 set_temp_os_max);
1da177e4 414static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
66b3b1f7 415 set_temp_os_hyst);
1da177e4 416static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
e84542f5
JD		 417static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
418static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
419static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
420static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
421static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
422static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
423static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
424static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
425static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
426static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
427static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
1da177e4
LT		 428
429/*
430 * Real code
431 */
432
0501a381 433static struct attribute *lm80_attributes[] = {
f8181762
JD		 434 &sensor_dev_attr_in0_min.dev_attr.attr,
435 &sensor_dev_attr_in1_min.dev_attr.attr,
436 &sensor_dev_attr_in2_min.dev_attr.attr,
437 &sensor_dev_attr_in3_min.dev_attr.attr,
438 &sensor_dev_attr_in4_min.dev_attr.attr,
439 &sensor_dev_attr_in5_min.dev_attr.attr,
440 &sensor_dev_attr_in6_min.dev_attr.attr,
441 &sensor_dev_attr_in0_max.dev_attr.attr,
442 &sensor_dev_attr_in1_max.dev_attr.attr,
443 &sensor_dev_attr_in2_max.dev_attr.attr,
444 &sensor_dev_attr_in3_max.dev_attr.attr,
445 &sensor_dev_attr_in4_max.dev_attr.attr,
446 &sensor_dev_attr_in5_max.dev_attr.attr,
447 &sensor_dev_attr_in6_max.dev_attr.attr,
448 &sensor_dev_attr_in0_input.dev_attr.attr,
449 &sensor_dev_attr_in1_input.dev_attr.attr,
450 &sensor_dev_attr_in2_input.dev_attr.attr,
451 &sensor_dev_attr_in3_input.dev_attr.attr,
452 &sensor_dev_attr_in4_input.dev_attr.attr,
453 &sensor_dev_attr_in5_input.dev_attr.attr,
454 &sensor_dev_attr_in6_input.dev_attr.attr,
455 &sensor_dev_attr_fan1_min.dev_attr.attr,
456 &sensor_dev_attr_fan2_min.dev_attr.attr,
457 &sensor_dev_attr_fan1_input.dev_attr.attr,
458 &sensor_dev_attr_fan2_input.dev_attr.attr,
459 &sensor_dev_attr_fan1_div.dev_attr.attr,
460 &sensor_dev_attr_fan2_div.dev_attr.attr,
0501a381
MH		 461 &dev_attr_temp1_input.attr,
462 &dev_attr_temp1_max.attr,
463 &dev_attr_temp1_max_hyst.attr,
464 &dev_attr_temp1_crit.attr,
465 &dev_attr_temp1_crit_hyst.attr,
466 &dev_attr_alarms.attr,
e84542f5
JD		 467 &sensor_dev_attr_in0_alarm.dev_attr.attr,
468 &sensor_dev_attr_in1_alarm.dev_attr.attr,
469 &sensor_dev_attr_in2_alarm.dev_attr.attr,
470 &sensor_dev_attr_in3_alarm.dev_attr.attr,
471 &sensor_dev_attr_in4_alarm.dev_attr.attr,
472 &sensor_dev_attr_in5_alarm.dev_attr.attr,
473 &sensor_dev_attr_in6_alarm.dev_attr.attr,
474 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
475 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
476 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
477 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
0501a381
MH		 478 NULL
479};
480
481static const struct attribute_group lm80_group = {
482 .attrs = lm80_attributes,
483};
484
8c8bacc8 485/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 486static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 487{
8c8bacc8 488 struct i2c_adapter *adapter = client->adapter;
1da177e4 489 int i, cur;
1da177e4
LT		 490
491 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
8c8bacc8 492 return -ENODEV;
1da177e4
LT		 493
494 /* Now, we do the remaining detection. It is lousy. */
6cc37ee5 495 if (lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
8c8bacc8 496 return -ENODEV;
1da177e4 497 for (i = 0x2a; i <= 0x3d; i++) {
6cc37ee5
JD		 498 cur = i2c_smbus_read_byte_data(client, i);
499 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
500 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
501 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
66b3b1f7 502 return -ENODEV;
1da177e4
LT		 503 }
504
8c8bacc8 505 strlcpy(info->type, "lm80", I2C_NAME_SIZE);
1da177e4 506
8c8bacc8
JD		 507 return 0;
508}
1da177e4 509
8c8bacc8
JD		 510static int lm80_probe(struct i2c_client *client,
511 const struct i2c_device_id *id)
512{
513 struct lm80_data *data;
514 int err;
515
516 data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL);
517 if (!data) {
518 err = -ENOMEM;
519 goto exit;
520 }
521
522 i2c_set_clientdata(client, data);
523 mutex_init(&data->update_lock);
1da177e4
LT		 524
525 /* Initialize the LM80 chip */
6cc37ee5 526 lm80_init_client(client);
1da177e4
LT		 527
528 /* A few vars need to be filled upon startup */
6cc37ee5
JD		 529 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
530 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
1da177e4
LT		 531
532 /* Register sysfs hooks */
66b3b1f7
FM		 533 err = sysfs_create_group(&client->dev.kobj, &lm80_group);
534 if (err)
8c8bacc8 535 goto error_free;
0501a381 536
6cc37ee5 537 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 538 if (IS_ERR(data->hwmon_dev)) {
539 err = PTR_ERR(data->hwmon_dev);
0501a381 540 goto error_remove;
943b0830
MH		 541 }
542
1da177e4
LT		 543 return 0;
544
0501a381 545error_remove:
6cc37ee5 546 sysfs_remove_group(&client->dev.kobj, &lm80_group);
1da177e4
LT		 547error_free:
548 kfree(data);
549exit:
550 return err;
551}
552
8c8bacc8 553static int lm80_remove(struct i2c_client *client)
1da177e4 554{
943b0830 555 struct lm80_data *data = i2c_get_clientdata(client);
1da177e4 556
1beeffe4 557 hwmon_device_unregister(data->hwmon_dev);
0501a381 558 sysfs_remove_group(&client->dev.kobj, &lm80_group);
1da177e4 559
943b0830 560 kfree(data);
1da177e4
LT		 561 return 0;
562}
563
564static int lm80_read_value(struct i2c_client *client, u8 reg)
565{
566 return i2c_smbus_read_byte_data(client, reg);
567}
568
569static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
570{
571 return i2c_smbus_write_byte_data(client, reg, value);
572}
573
574/* Called when we have found a new LM80. */
575static void lm80_init_client(struct i2c_client *client)
576{
577 /* Reset all except Watchdog values and last conversion values
578 This sets fan-divs to 2, among others. This makes most other
579 initializations unnecessary */
580 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
581 /* Set 11-bit temperature resolution */
582 lm80_write_value(client, LM80_REG_RES, 0x08);
583
584 /* Start monitoring */
585 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
586}
587
588static struct lm80_data *lm80_update_device(struct device *dev)
589{
590 struct i2c_client *client = to_i2c_client(dev);
591 struct lm80_data *data = i2c_get_clientdata(client);
592 int i;
2faaa931
FM		 593 int rv;
594 int prev_rv;
595 struct lm80_data *ret = data;
1da177e4 596
9a61bf63 597 mutex_lock(&data->update_lock);
1da177e4 598
96585f1a
FM		 599 if (data->error)
600 lm80_init_client(client);
601
1da177e4
LT		 602 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
603 dev_dbg(&client->dev, "Starting lm80 update\n");
604 for (i = 0; i <= 6; i++) {
2faaa931
FM		 605 rv = lm80_read_value(client, LM80_REG_IN(i));
606 if (rv < 0)
607 goto abort;
608 data->in[i] = rv;
609
610 rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
611 if (rv < 0)
612 goto abort;
613 data->in_min[i] = rv;
614
615 rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
616 if (rv < 0)
617 goto abort;
618 data->in_max[i] = rv;
1da177e4 619 }
2faaa931
FM		 620
621 rv = lm80_read_value(client, LM80_REG_FAN1);
622 if (rv < 0)
623 goto abort;
624 data->fan[0] = rv;
625
626 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
627 if (rv < 0)
628 goto abort;
629 data->fan_min[0] = rv;
630
631 rv = lm80_read_value(client, LM80_REG_FAN2);
632 if (rv < 0)
633 goto abort;
634 data->fan[1] = rv;
635
636 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
637 if (rv < 0)
638 goto abort;
639 data->fan_min[1] = rv;
640
641 prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
642 if (rv < 0)
643 goto abort;
644 rv = lm80_read_value(client, LM80_REG_RES);
645 if (rv < 0)
646 goto abort;
647 data->temp = (prev_rv << 8) | (rv & 0xf0);
648
649 rv = lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
650 if (rv < 0)
651 goto abort;
652 data->temp_os_max = rv;
653
654 rv = lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
655 if (rv < 0)
656 goto abort;
657 data->temp_os_hyst = rv;
658
659 rv = lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
660 if (rv < 0)
661 goto abort;
662 data->temp_hot_max = rv;
663
664 rv = lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
665 if (rv < 0)
666 goto abort;
667 data->temp_hot_hyst = rv;
668
669 rv = lm80_read_value(client, LM80_REG_FANDIV);
670 if (rv < 0)
671 goto abort;
672 data->fan_div[0] = (rv >> 2) & 0x03;
673 data->fan_div[1] = (rv >> 4) & 0x03;
674
675 prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
676 if (rv < 0)
677 goto abort;
678 rv = lm80_read_value(client, LM80_REG_ALARM2);
679 if (rv < 0)
680 goto abort;
681 data->alarms = prev_rv + (rv << 8);
682
1da177e4
LT		 683 data->last_updated = jiffies;
684 data->valid = 1;
96585f1a 685 data->error = 0;
1da177e4 686 }
2faaa931
FM		 687 goto done;
688
689abort:
690 ret = ERR_PTR(rv);
691 data->valid = 0;
96585f1a 692 data->error = 1;
1da177e4 693
2faaa931 694done:
9a61bf63 695 mutex_unlock(&data->update_lock);
1da177e4 696
2faaa931 697 return ret;
1da177e4
LT		 698}
699
f0967eea 700module_i2c_driver(lm80_driver);
1da177e4
LT		 701
702MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
703 "Philip Edelbrock <phil@netroedge.com>");
704MODULE_DESCRIPTION("LM80 driver");
705MODULE_LICENSE("GPL");
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