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hwmon: (lm80) Convert fan display function macros into functions
[mirror_ubuntu-hirsute-kernel.git] / drivers / hwmon / lm80.c
CommitLineData
1da177e4
LT		 1/*
2 * lm80.c - From lm_sensors, Linux kernel modules for hardware
1160631b 3 * monitoring
1da177e4 4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
1160631b 5 * and Philip Edelbrock <phil@netroedge.com>
1da177e4
LT		 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
9908ad4c
JD		 63#define LM96080_REG_CONV_RATE 0x07
64#define LM96080_REG_MAN_ID 0x3e
65#define LM96080_REG_DEV_ID 0x3f
66
1da177e4 67
1160631b
GR		 68/*
69 * Conversions. Rounding and limit checking is only done on the TO_REG
70 * variants. Note that you should be a bit careful with which arguments
71 * these macros are called: arguments may be evaluated more than once.
72 * Fixing this is just not worth it.
73 */
1da177e4 74
2a844c14 75#define IN_TO_REG(val) (clamp_val(((val) + 5) / 10, 0, 255))
66b3b1f7 76#define IN_FROM_REG(val) ((val) * 10)
1da177e4
LT		 77
78static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
79{
80 if (rpm == 0)
81 return 255;
2a844c14
GR		 82 rpm = clamp_val(rpm, 1, 1000000);
83 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
1da177e4
LT		 84}
85
66b3b1f7
FM		 86#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
87 (val) == 255 ? 0 : 1350000/((div) * (val)))
1da177e4 88
688a3174
GR		 89#define TEMP_FROM_REG(reg) ((reg) * 125 / 32)
90#define TEMP_TO_REG(temp) (DIV_ROUND_CLOSEST(clamp_val((temp), \
91 -128000, 127000), 1000) << 8)
1da177e4
LT		 92
93#define DIV_FROM_REG(val) (1 << (val))
94
9711bcdd
GR		 95enum temp_index {
96 t_input = 0,
97 t_hot_max,
98 t_hot_hyst,
99 t_os_max,
100 t_os_hyst,
101 t_num_temp
102};
103
104static const u8 temp_regs[t_num_temp] = {
105 [t_input] = LM80_REG_TEMP,
106 [t_hot_max] = LM80_REG_TEMP_HOT_MAX,
107 [t_hot_hyst] = LM80_REG_TEMP_HOT_HYST,
108 [t_os_max] = LM80_REG_TEMP_OS_MAX,
109 [t_os_hyst] = LM80_REG_TEMP_OS_HYST,
110};
111
1adf3a3e
GR		 112enum in_index {
113 i_input = 0,
114 i_max,
115 i_min,
116 i_num_in
117};
118
85b3ee07
GR		 119enum fan_index {
120 f_input,
121 f_min,
122 f_num_fan
123};
124
1da177e4
LT		 125/*
126 * Client data (each client gets its own)
127 */
128
129struct lm80_data {
118c9a61 130 struct i2c_client *client;
9a61bf63 131 struct mutex update_lock;
96585f1a 132 char error; /* !=0 if error occurred during last update */
1da177e4
LT		 133 char valid; /* !=0 if following fields are valid */
134 unsigned long last_updated; /* In jiffies */
135
1adf3a3e 136 u8 in[i_num_in][7]; /* Register value, 1st index is enum in_index */
85b3ee07 137 u8 fan[f_num_fan][2]; /* Register value, 1st index enum fan_index */
1da177e4 138 u8 fan_div[2]; /* Register encoding, shifted right */
9711bcdd 139 s16 temp[t_num_temp]; /* Register values, normalized to 16 bit */
1da177e4
LT		 140 u16 alarms; /* Register encoding, combined */
141};
142
6cc37ee5 143/*
1da177e4
LT		 144 * Functions declaration
145 */
146
8c8bacc8
JD		 147static int lm80_probe(struct i2c_client *client,
148 const struct i2c_device_id *id);
310ec792 149static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
1da177e4 150static void lm80_init_client(struct i2c_client *client);
1da177e4
LT		 151static struct lm80_data *lm80_update_device(struct device *dev);
152static int lm80_read_value(struct i2c_client *client, u8 reg);
153static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
154
155/*
156 * Driver data (common to all clients)
157 */
158
8c8bacc8 159static const struct i2c_device_id lm80_id[] = {
1f86df49 160 { "lm80", 0 },
9908ad4c 161 { "lm96080", 1 },
8c8bacc8
JD		 162 { }
163};
164MODULE_DEVICE_TABLE(i2c, lm80_id);
165
1da177e4 166static struct i2c_driver lm80_driver = {
8c8bacc8 167 .class = I2C_CLASS_HWMON,
cdaf7934 168 .driver = {
cdaf7934
LR		 169 .name = "lm80",
170 },
8c8bacc8 171 .probe = lm80_probe,
8c8bacc8
JD		 172 .id_table = lm80_id,
173 .detect = lm80_detect,
c3813d6a 174 .address_list = normal_i2c,
1da177e4
LT		 175};
176
177/*
178 * Sysfs stuff
179 */
180
1adf3a3e
GR		 181static ssize_t show_in(struct device *dev, struct device_attribute *attr,
182 char *buf)
183{
184 struct lm80_data *data = lm80_update_device(dev);
185 int index = to_sensor_dev_attr_2(attr)->index;
186 int nr = to_sensor_dev_attr_2(attr)->nr;
187
188 if (IS_ERR(data))
189 return PTR_ERR(data);
190 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr][index]));
1da177e4 191}
1da177e4 192
1adf3a3e
GR		 193static ssize_t set_in(struct device *dev, struct device_attribute *attr,
194 const char *buf, size_t count)
195{
196 struct lm80_data *data = dev_get_drvdata(dev);
197 struct i2c_client *client = data->client;
198 int index = to_sensor_dev_attr_2(attr)->index;
199 int nr = to_sensor_dev_attr_2(attr)->nr;
200 long val;
201 u8 reg;
202 int err = kstrtol(buf, 10, &val);
203 if (err < 0)
204 return err;
205
206 reg = nr == i_min ? LM80_REG_IN_MIN(index) : LM80_REG_IN_MAX(index);
207
208 mutex_lock(&data->update_lock);
209 data->in[nr][index] = IN_TO_REG(val);
210 lm80_write_value(client, reg, data->in[nr][index]);
211 mutex_unlock(&data->update_lock);
212 return count;
1da177e4 213}
f8181762 214
85b3ee07
GR		 215static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
216 char *buf)
217{
218 int index = to_sensor_dev_attr_2(attr)->index;
219 int nr = to_sensor_dev_attr_2(attr)->nr;
220 struct lm80_data *data = lm80_update_device(dev);
221 if (IS_ERR(data))
222 return PTR_ERR(data);
223 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr][index],
224 DIV_FROM_REG(data->fan_div[index])));
1da177e4 225}
1da177e4 226
f8181762
JD		 227static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
228 char *buf)
229{
230 int nr = to_sensor_dev_attr(attr)->index;
231 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 232 if (IS_ERR(data))
233 return PTR_ERR(data);
f8181762 234 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
1da177e4 235}
1da177e4 236
f8181762
JD		 237static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
238 const char *buf, size_t count)
239{
85b3ee07
GR		 240 int index = to_sensor_dev_attr_2(attr)->index;
241 int nr = to_sensor_dev_attr_2(attr)->nr;
118c9a61
GR		 242 struct lm80_data *data = dev_get_drvdata(dev);
243 struct i2c_client *client = data->client;
6a9e7c4c
FM		 244 unsigned long val;
245 int err = kstrtoul(buf, 10, &val);
246 if (err < 0)
247 return err;
f8181762
JD		 248
249 mutex_lock(&data->update_lock);
85b3ee07
GR		 250 data->fan[nr][index] = FAN_TO_REG(val,
251 DIV_FROM_REG(data->fan_div[index]));
252 lm80_write_value(client, LM80_REG_FAN_MIN(index + 1),
253 data->fan[nr][index]);
f8181762
JD		 254 mutex_unlock(&data->update_lock);
255 return count;
1da177e4 256}
1da177e4 257
1160631b
GR		 258/*
259 * Note: we save and restore the fan minimum here, because its value is
260 * determined in part by the fan divisor. This follows the principle of
261 * least surprise; the user doesn't expect the fan minimum to change just
262 * because the divisor changed.
263 */
f8181762
JD		 264static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
265 const char *buf, size_t count)
1da177e4 266{
f8181762 267 int nr = to_sensor_dev_attr(attr)->index;
118c9a61
GR		 268 struct lm80_data *data = dev_get_drvdata(dev);
269 struct i2c_client *client = data->client;
6a9e7c4c 270 unsigned long min, val;
1da177e4 271 u8 reg;
6a9e7c4c
FM		 272 int err = kstrtoul(buf, 10, &val);
273 if (err < 0)
274 return err;
1da177e4
LT		 275
276 /* Save fan_min */
9a61bf63 277 mutex_lock(&data->update_lock);
85b3ee07 278 min = FAN_FROM_REG(data->fan[f_min][nr],
1da177e4
LT		 279 DIV_FROM_REG(data->fan_div[nr]));
280
281 switch (val) {
66b3b1f7
FM		 282 case 1:
283 data->fan_div[nr] = 0;
284 break;
285 case 2:
286 data->fan_div[nr] = 1;
287 break;
288 case 4:
289 data->fan_div[nr] = 2;
290 break;
291 case 8:
292 data->fan_div[nr] = 3;
293 break;
1da177e4 294 default:
118c9a61 295 dev_err(dev,
b55f3757
GR		 296 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
297 val);
9a61bf63 298 mutex_unlock(&data->update_lock);
1da177e4
LT		 299 return -EINVAL;
300 }
301
85b3ee07
GR		 302 reg = (lm80_read_value(client, LM80_REG_FANDIV) &
303 ~(3 << (2 * (nr + 1)))) | (data->fan_div[nr] << (2 * (nr + 1)));
1da177e4
LT		 304 lm80_write_value(client, LM80_REG_FANDIV, reg);
305
306 /* Restore fan_min */
85b3ee07
GR		 307 data->fan[f_min][nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
308 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1),
309 data->fan[f_min][nr]);
9a61bf63 310 mutex_unlock(&data->update_lock);
1da177e4
LT		 311
312 return count;
313}
314
9711bcdd
GR		 315static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
316 char *buf)
1da177e4 317{
9711bcdd 318 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1da177e4 319 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 320 if (IS_ERR(data))
321 return PTR_ERR(data);
9711bcdd 322 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
1da177e4
LT		 323}
324
9711bcdd
GR		 325static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
326 const char *buf, size_t count)
327{
328 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
329 struct lm80_data *data = dev_get_drvdata(dev);
330 struct i2c_client *client = data->client;
331 int nr = attr->index;
332 long val;
333 int err = kstrtol(buf, 10, &val);
334 if (err < 0)
335 return err;
1da177e4 336
9711bcdd
GR		 337 mutex_lock(&data->update_lock);
338 data->temp[nr] = TEMP_TO_REG(val);
339 lm80_write_value(client, temp_regs[nr], data->temp[nr] >> 8);
340 mutex_unlock(&data->update_lock);
341 return count;
1da177e4 342}
1da177e4 343
6cc37ee5
JD		 344static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
345 char *buf)
1da177e4
LT		 346{
347 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 348 if (IS_ERR(data))
349 return PTR_ERR(data);
1da177e4
LT		 350 return sprintf(buf, "%u\n", data->alarms);
351}
352
e84542f5
JD		 353static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
354 char *buf)
355{
356 int bitnr = to_sensor_dev_attr(attr)->index;
357 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 358 if (IS_ERR(data))
359 return PTR_ERR(data);
e84542f5
JD		 360 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
361}
362
1adf3a3e
GR		 363static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO,
364 show_in, set_in, i_min, 0);
365static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO,
366 show_in, set_in, i_min, 1);
367static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO,
368 show_in, set_in, i_min, 2);
369static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO,
370 show_in, set_in, i_min, 3);
371static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO,
372 show_in, set_in, i_min, 4);
373static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO,
374 show_in, set_in, i_min, 5);
375static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO,
376 show_in, set_in, i_min, 6);
377static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO,
378 show_in, set_in, i_max, 0);
379static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO,
380 show_in, set_in, i_max, 1);
381static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO,
382 show_in, set_in, i_max, 2);
383static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO,
384 show_in, set_in, i_max, 3);
385static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO,
386 show_in, set_in, i_max, 4);
387static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO,
388 show_in, set_in, i_max, 5);
389static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO,
390 show_in, set_in, i_max, 6);
391static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, i_input, 0);
392static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, i_input, 1);
393static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, i_input, 2);
394static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, i_input, 3);
395static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, i_input, 4);
396static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, i_input, 5);
397static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, i_input, 6);
85b3ee07
GR		 398static SENSOR_DEVICE_ATTR_2(fan1_min, S_IWUSR | S_IRUGO,
399 show_fan, set_fan_min, f_min, 0);
400static SENSOR_DEVICE_ATTR_2(fan2_min, S_IWUSR | S_IRUGO,
401 show_fan, set_fan_min, f_min, 1);
402static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, f_input, 0);
403static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, f_input, 1);
f8181762
JD		 404static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
405 show_fan_div, set_fan_div, 0);
406static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
407 show_fan_div, set_fan_div, 1);
9711bcdd
GR		 408static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input);
409static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp,
410 set_temp, t_hot_max);
411static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp,
412 set_temp, t_hot_hyst);
413static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
414 set_temp, t_os_max);
415static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp,
416 set_temp, t_os_hyst);
1da177e4 417static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
e84542f5
JD		 418static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
419static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
420static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
421static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
422static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
423static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
424static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
425static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
426static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
427static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
428static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
1da177e4
LT		 429
430/*
431 * Real code
432 */
433
118c9a61 434static struct attribute *lm80_attrs[] = {
f8181762
JD		 435 &sensor_dev_attr_in0_min.dev_attr.attr,
436 &sensor_dev_attr_in1_min.dev_attr.attr,
437 &sensor_dev_attr_in2_min.dev_attr.attr,
438 &sensor_dev_attr_in3_min.dev_attr.attr,
439 &sensor_dev_attr_in4_min.dev_attr.attr,
440 &sensor_dev_attr_in5_min.dev_attr.attr,
441 &sensor_dev_attr_in6_min.dev_attr.attr,
442 &sensor_dev_attr_in0_max.dev_attr.attr,
443 &sensor_dev_attr_in1_max.dev_attr.attr,
444 &sensor_dev_attr_in2_max.dev_attr.attr,
445 &sensor_dev_attr_in3_max.dev_attr.attr,
446 &sensor_dev_attr_in4_max.dev_attr.attr,
447 &sensor_dev_attr_in5_max.dev_attr.attr,
448 &sensor_dev_attr_in6_max.dev_attr.attr,
449 &sensor_dev_attr_in0_input.dev_attr.attr,
450 &sensor_dev_attr_in1_input.dev_attr.attr,
451 &sensor_dev_attr_in2_input.dev_attr.attr,
452 &sensor_dev_attr_in3_input.dev_attr.attr,
453 &sensor_dev_attr_in4_input.dev_attr.attr,
454 &sensor_dev_attr_in5_input.dev_attr.attr,
455 &sensor_dev_attr_in6_input.dev_attr.attr,
456 &sensor_dev_attr_fan1_min.dev_attr.attr,
457 &sensor_dev_attr_fan2_min.dev_attr.attr,
458 &sensor_dev_attr_fan1_input.dev_attr.attr,
459 &sensor_dev_attr_fan2_input.dev_attr.attr,
460 &sensor_dev_attr_fan1_div.dev_attr.attr,
461 &sensor_dev_attr_fan2_div.dev_attr.attr,
9711bcdd
GR		 462 &sensor_dev_attr_temp1_input.dev_attr.attr,
463 &sensor_dev_attr_temp1_max.dev_attr.attr,
464 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
465 &sensor_dev_attr_temp1_crit.dev_attr.attr,
466 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
0501a381 467 &dev_attr_alarms.attr,
e84542f5
JD		 468 &sensor_dev_attr_in0_alarm.dev_attr.attr,
469 &sensor_dev_attr_in1_alarm.dev_attr.attr,
470 &sensor_dev_attr_in2_alarm.dev_attr.attr,
471 &sensor_dev_attr_in3_alarm.dev_attr.attr,
472 &sensor_dev_attr_in4_alarm.dev_attr.attr,
473 &sensor_dev_attr_in5_alarm.dev_attr.attr,
474 &sensor_dev_attr_in6_alarm.dev_attr.attr,
475 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
476 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
477 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
478 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
0501a381
MH		 479 NULL
480};
118c9a61 481ATTRIBUTE_GROUPS(lm80);
0501a381 482
8c8bacc8 483/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 484static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 485{
8c8bacc8 486 struct i2c_adapter *adapter = client->adapter;
9908ad4c
JD		 487 int i, cur, man_id, dev_id;
488 const char *name = NULL;
1da177e4
LT		 489
490 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
8c8bacc8 491 return -ENODEV;
1da177e4 492
9908ad4c
JD		 493 /* First check for unused bits, common to both chip types */
494 if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
495 || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80))
8c8bacc8 496 return -ENODEV;
9908ad4c
JD		 497
498 /*
499 * The LM96080 has manufacturer and stepping/die rev registers so we
500 * can just check that. The LM80 does not have such registers so we
501 * have to use a more expensive trick.
502 */
503 man_id = lm80_read_value(client, LM96080_REG_MAN_ID);
504 dev_id = lm80_read_value(client, LM96080_REG_DEV_ID);
505 if (man_id == 0x01 && dev_id == 0x08) {
506 /* Check more unused bits for confirmation */
507 if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe)
66b3b1f7 508 return -ENODEV;
9908ad4c
JD		 509
510 name = "lm96080";
511 } else {
512 /* Check 6-bit addressing */
513 for (i = 0x2a; i <= 0x3d; i++) {
514 cur = i2c_smbus_read_byte_data(client, i);
515 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
516 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
517 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
518 return -ENODEV;
519 }
520
521 name = "lm80";
1da177e4
LT		 522 }
523
9908ad4c 524 strlcpy(info->type, name, I2C_NAME_SIZE);
1da177e4 525
8c8bacc8
JD		 526 return 0;
527}
1da177e4 528
8c8bacc8
JD		 529static int lm80_probe(struct i2c_client *client,
530 const struct i2c_device_id *id)
531{
118c9a61
GR		 532 struct device *dev = &client->dev;
533 struct device *hwmon_dev;
8c8bacc8 534 struct lm80_data *data;
8c8bacc8 535
118c9a61 536 data = devm_kzalloc(dev, sizeof(struct lm80_data), GFP_KERNEL);
c38b2820
GR		 537 if (!data)
538 return -ENOMEM;
8c8bacc8 539
118c9a61 540 data->client = client;
8c8bacc8 541 mutex_init(&data->update_lock);
1da177e4
LT		 542
543 /* Initialize the LM80 chip */
6cc37ee5 544 lm80_init_client(client);
1da177e4
LT		 545
546 /* A few vars need to be filled upon startup */
85b3ee07
GR		 547 data->fan[f_min][0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
548 data->fan[f_min][1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
1da177e4 549
118c9a61
GR		 550 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
551 data, lm80_groups);
943b0830 552
118c9a61 553 return PTR_ERR_OR_ZERO(hwmon_dev);
1da177e4
LT		 554}
555
556static int lm80_read_value(struct i2c_client *client, u8 reg)
557{
558 return i2c_smbus_read_byte_data(client, reg);
559}
560
561static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
562{
563 return i2c_smbus_write_byte_data(client, reg, value);
564}
565
566/* Called when we have found a new LM80. */
567static void lm80_init_client(struct i2c_client *client)
568{
1160631b
GR		 569 /*
570 * Reset all except Watchdog values and last conversion values
571 * This sets fan-divs to 2, among others. This makes most other
572 * initializations unnecessary
573 */
1da177e4
LT		 574 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
575 /* Set 11-bit temperature resolution */
576 lm80_write_value(client, LM80_REG_RES, 0x08);
577
578 /* Start monitoring */
579 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
580}
581
582static struct lm80_data *lm80_update_device(struct device *dev)
583{
118c9a61
GR		 584 struct lm80_data *data = dev_get_drvdata(dev);
585 struct i2c_client *client = data->client;
1da177e4 586 int i;
2faaa931
FM		 587 int rv;
588 int prev_rv;
589 struct lm80_data *ret = data;
1da177e4 590
9a61bf63 591 mutex_lock(&data->update_lock);
1da177e4 592
96585f1a
FM		 593 if (data->error)
594 lm80_init_client(client);
595
1da177e4 596 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
118c9a61 597 dev_dbg(dev, "Starting lm80 update\n");
1da177e4 598 for (i = 0; i <= 6; i++) {
2faaa931
FM		 599 rv = lm80_read_value(client, LM80_REG_IN(i));
600 if (rv < 0)
601 goto abort;
1adf3a3e 602 data->in[i_input][i] = rv;
2faaa931
FM		 603
604 rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
605 if (rv < 0)
606 goto abort;
1adf3a3e 607 data->in[i_min][i] = rv;
2faaa931
FM		 608
609 rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
610 if (rv < 0)
611 goto abort;
1adf3a3e 612 data->in[i_max][i] = rv;
1da177e4 613 }
2faaa931
FM		 614
615 rv = lm80_read_value(client, LM80_REG_FAN1);
616 if (rv < 0)
617 goto abort;
85b3ee07 618 data->fan[f_input][0] = rv;
2faaa931
FM		 619
620 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
621 if (rv < 0)
622 goto abort;
85b3ee07 623 data->fan[f_min][0] = rv;
2faaa931
FM		 624
625 rv = lm80_read_value(client, LM80_REG_FAN2);
626 if (rv < 0)
627 goto abort;
85b3ee07 628 data->fan[f_input][1] = rv;
2faaa931
FM		 629
630 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
631 if (rv < 0)
632 goto abort;
85b3ee07 633 data->fan[f_min][1] = rv;
2faaa931
FM		 634
635 prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
636 if (rv < 0)
637 goto abort;
638 rv = lm80_read_value(client, LM80_REG_RES);
639 if (rv < 0)
640 goto abort;
9711bcdd 641 data->temp[t_input] = (prev_rv << 8) | (rv & 0xf0);
2faaa931 642
9711bcdd
GR		 643 for (i = t_input + 1; i < t_num_temp; i++) {
644 rv = lm80_read_value(client, temp_regs[i]);
645 if (rv < 0)
646 goto abort;
647 data->temp[i] = rv << 8;
648 }
2faaa931
FM		 649
650 rv = lm80_read_value(client, LM80_REG_FANDIV);
651 if (rv < 0)
652 goto abort;
653 data->fan_div[0] = (rv >> 2) & 0x03;
654 data->fan_div[1] = (rv >> 4) & 0x03;
655
656 prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
657 if (rv < 0)
658 goto abort;
659 rv = lm80_read_value(client, LM80_REG_ALARM2);
660 if (rv < 0)
661 goto abort;
662 data->alarms = prev_rv + (rv << 8);
663
1da177e4
LT		 664 data->last_updated = jiffies;
665 data->valid = 1;
96585f1a 666 data->error = 0;
1da177e4 667 }
2faaa931
FM		 668 goto done;
669
670abort:
671 ret = ERR_PTR(rv);
672 data->valid = 0;
96585f1a 673 data->error = 1;
1da177e4 674
2faaa931 675done:
9a61bf63 676 mutex_unlock(&data->update_lock);
1da177e4 677
2faaa931 678 return ret;
1da177e4
LT		 679}
680
f0967eea 681module_i2c_driver(lm80_driver);
1da177e4
LT		 682
683MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
684 "Philip Edelbrock <phil@netroedge.com>");
685MODULE_DESCRIPTION("LM80 driver");
686MODULE_LICENSE("GPL");
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