projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'for-linus-20190118' of git://git.kernel.dk/linux-block
[linux-2.6-block.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
c254ffde
GR		 143static int lm80_read_value(struct i2c_client *client, u8 reg)
144{
145 return i2c_smbus_read_byte_data(client, reg);
146}
1da177e4 147
c254ffde
GR		 148static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
149{
150 return i2c_smbus_write_byte_data(client, reg, value);
151}
1da177e4 152
c254ffde
GR		 153/* Called when we have found a new LM80 and after read errors */
154static void lm80_init_client(struct i2c_client *client)
155{
156 /*
157 * Reset all except Watchdog values and last conversion values
158 * This sets fan-divs to 2, among others. This makes most other
159 * initializations unnecessary
160 */
161 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
162 /* Set 11-bit temperature resolution */
163 lm80_write_value(client, LM80_REG_RES, 0x08);
1da177e4 164
c254ffde
GR		 165 /* Start monitoring */
166 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
167}
8c8bacc8 168
c254ffde
GR		 169static struct lm80_data *lm80_update_device(struct device *dev)
170{
171 struct lm80_data *data = dev_get_drvdata(dev);
172 struct i2c_client *client = data->client;
173 int i;
174 int rv;
175 int prev_rv;
176 struct lm80_data *ret = data;
177
178 mutex_lock(&data->update_lock);
179
180 if (data->error)
181 lm80_init_client(client);
182
183 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
184 dev_dbg(dev, "Starting lm80 update\n");
185 for (i = 0; i <= 6; i++) {
186 rv = lm80_read_value(client, LM80_REG_IN(i));
187 if (rv < 0)
188 goto abort;
189 data->in[i_input][i] = rv;
190
191 rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
192 if (rv < 0)
193 goto abort;
194 data->in[i_min][i] = rv;
195
196 rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
197 if (rv < 0)
198 goto abort;
199 data->in[i_max][i] = rv;
200 }
201
202 rv = lm80_read_value(client, LM80_REG_FAN1);
203 if (rv < 0)
204 goto abort;
205 data->fan[f_input][0] = rv;
206
207 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
208 if (rv < 0)
209 goto abort;
210 data->fan[f_min][0] = rv;
211
212 rv = lm80_read_value(client, LM80_REG_FAN2);
213 if (rv < 0)
214 goto abort;
215 data->fan[f_input][1] = rv;
216
217 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
218 if (rv < 0)
219 goto abort;
220 data->fan[f_min][1] = rv;
221
222 prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
223 if (rv < 0)
224 goto abort;
225 rv = lm80_read_value(client, LM80_REG_RES);
226 if (rv < 0)
227 goto abort;
228 data->temp[t_input] = (prev_rv << 8) | (rv & 0xf0);
229
230 for (i = t_input + 1; i < t_num_temp; i++) {
231 rv = lm80_read_value(client, temp_regs[i]);
232 if (rv < 0)
233 goto abort;
234 data->temp[i] = rv << 8;
235 }
236
237 rv = lm80_read_value(client, LM80_REG_FANDIV);
238 if (rv < 0)
239 goto abort;
240 data->fan_div[0] = (rv >> 2) & 0x03;
241 data->fan_div[1] = (rv >> 4) & 0x03;
242
243 prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
244 if (rv < 0)
245 goto abort;
246 rv = lm80_read_value(client, LM80_REG_ALARM2);
247 if (rv < 0)
248 goto abort;
249 data->alarms = prev_rv + (rv << 8);
250
251 data->last_updated = jiffies;
252 data->valid = 1;
253 data->error = 0;
254 }
255 goto done;
256
257abort:
258 ret = ERR_PTR(rv);
259 data->valid = 0;
260 data->error = 1;
261
262done:
263 mutex_unlock(&data->update_lock);
264
265 return ret;
266}
1da177e4
LT		 267
268/*
269 * Sysfs stuff
270 */
271
1adf3a3e
GR		 272static ssize_t show_in(struct device *dev, struct device_attribute *attr,
273 char *buf)
274{
275 struct lm80_data *data = lm80_update_device(dev);
276 int index = to_sensor_dev_attr_2(attr)->index;
277 int nr = to_sensor_dev_attr_2(attr)->nr;
278
279 if (IS_ERR(data))
280 return PTR_ERR(data);
281 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr][index]));
1da177e4 282}
1da177e4 283
1adf3a3e
GR		 284static ssize_t set_in(struct device *dev, struct device_attribute *attr,
285 const char *buf, size_t count)
286{
287 struct lm80_data *data = dev_get_drvdata(dev);
288 struct i2c_client *client = data->client;
289 int index = to_sensor_dev_attr_2(attr)->index;
290 int nr = to_sensor_dev_attr_2(attr)->nr;
291 long val;
292 u8 reg;
293 int err = kstrtol(buf, 10, &val);
294 if (err < 0)
295 return err;
296
297 reg = nr == i_min ? LM80_REG_IN_MIN(index) : LM80_REG_IN_MAX(index);
298
299 mutex_lock(&data->update_lock);
300 data->in[nr][index] = IN_TO_REG(val);
301 lm80_write_value(client, reg, data->in[nr][index]);
302 mutex_unlock(&data->update_lock);
303 return count;
1da177e4 304}
f8181762 305
85b3ee07
GR		 306static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
307 char *buf)
308{
309 int index = to_sensor_dev_attr_2(attr)->index;
310 int nr = to_sensor_dev_attr_2(attr)->nr;
311 struct lm80_data *data = lm80_update_device(dev);
312 if (IS_ERR(data))
313 return PTR_ERR(data);
314 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr][index],
315 DIV_FROM_REG(data->fan_div[index])));
1da177e4 316}
1da177e4 317
f8181762
JD		 318static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
319 char *buf)
320{
321 int nr = to_sensor_dev_attr(attr)->index;
322 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 323 if (IS_ERR(data))
324 return PTR_ERR(data);
f8181762 325 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
1da177e4 326}
1da177e4 327
f8181762
JD		 328static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
329 const char *buf, size_t count)
330{
85b3ee07
GR		 331 int index = to_sensor_dev_attr_2(attr)->index;
332 int nr = to_sensor_dev_attr_2(attr)->nr;
118c9a61
GR		 333 struct lm80_data *data = dev_get_drvdata(dev);
334 struct i2c_client *client = data->client;
6a9e7c4c
FM		 335 unsigned long val;
336 int err = kstrtoul(buf, 10, &val);
337 if (err < 0)
338 return err;
f8181762
JD		 339
340 mutex_lock(&data->update_lock);
85b3ee07
GR		 341 data->fan[nr][index] = FAN_TO_REG(val,
342 DIV_FROM_REG(data->fan_div[index]));
343 lm80_write_value(client, LM80_REG_FAN_MIN(index + 1),
344 data->fan[nr][index]);
f8181762
JD		 345 mutex_unlock(&data->update_lock);
346 return count;
1da177e4 347}
1da177e4 348
1160631b
GR		 349/*
350 * Note: we save and restore the fan minimum here, because its value is
351 * determined in part by the fan divisor. This follows the principle of
352 * least surprise; the user doesn't expect the fan minimum to change just
353 * because the divisor changed.
354 */
f8181762
JD		 355static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
356 const char *buf, size_t count)
1da177e4 357{
f8181762 358 int nr = to_sensor_dev_attr(attr)->index;
118c9a61
GR		 359 struct lm80_data *data = dev_get_drvdata(dev);
360 struct i2c_client *client = data->client;
6a9e7c4c 361 unsigned long min, val;
1da177e4 362 u8 reg;
c9c63915
KL		 363 int rv;
364
365 rv = kstrtoul(buf, 10, &val);
366 if (rv < 0)
367 return rv;
1da177e4
LT		 368
369 /* Save fan_min */
9a61bf63 370 mutex_lock(&data->update_lock);
85b3ee07 371 min = FAN_FROM_REG(data->fan[f_min][nr],
1da177e4
LT		 372 DIV_FROM_REG(data->fan_div[nr]));
373
374 switch (val) {
66b3b1f7
FM		 375 case 1:
376 data->fan_div[nr] = 0;
377 break;
378 case 2:
379 data->fan_div[nr] = 1;
380 break;
381 case 4:
382 data->fan_div[nr] = 2;
383 break;
384 case 8:
385 data->fan_div[nr] = 3;
386 break;
1da177e4 387 default:
118c9a61 388 dev_err(dev,
b55f3757
GR		 389 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
390 val);
9a61bf63 391 mutex_unlock(&data->update_lock);
1da177e4
LT		 392 return -EINVAL;
393 }
394
c9c63915 395 rv = lm80_read_value(client, LM80_REG_FANDIV);
07bd14cc
WY		 396 if (rv < 0) {
397 mutex_unlock(&data->update_lock);
c9c63915 398 return rv;
07bd14cc 399 }
c9c63915
KL		 400 reg = (rv & ~(3 << (2 * (nr + 1))))
401 | (data->fan_div[nr] << (2 * (nr + 1)));
1da177e4
LT		 402 lm80_write_value(client, LM80_REG_FANDIV, reg);
403
404 /* Restore fan_min */
85b3ee07
GR		 405 data->fan[f_min][nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
406 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1),
407 data->fan[f_min][nr]);
9a61bf63 408 mutex_unlock(&data->update_lock);
1da177e4
LT		 409
410 return count;
411}
412
9711bcdd
GR		 413static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
414 char *buf)
1da177e4 415{
9711bcdd 416 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1da177e4 417 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 418 if (IS_ERR(data))
419 return PTR_ERR(data);
9711bcdd 420 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
1da177e4
LT		 421}
422
9711bcdd
GR		 423static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
424 const char *buf, size_t count)
425{
426 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
427 struct lm80_data *data = dev_get_drvdata(dev);
428 struct i2c_client *client = data->client;
429 int nr = attr->index;
430 long val;
431 int err = kstrtol(buf, 10, &val);
432 if (err < 0)
433 return err;
1da177e4 434
9711bcdd
GR		 435 mutex_lock(&data->update_lock);
436 data->temp[nr] = TEMP_TO_REG(val);
437 lm80_write_value(client, temp_regs[nr], data->temp[nr] >> 8);
438 mutex_unlock(&data->update_lock);
439 return count;
1da177e4 440}
1da177e4 441
1547690d 442static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
6cc37ee5 443 char *buf)
1da177e4
LT		 444{
445 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 446 if (IS_ERR(data))
447 return PTR_ERR(data);
1da177e4
LT		 448 return sprintf(buf, "%u\n", data->alarms);
449}
450
e84542f5
JD		 451static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
452 char *buf)
453{
454 int bitnr = to_sensor_dev_attr(attr)->index;
455 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 456 if (IS_ERR(data))
457 return PTR_ERR(data);
e84542f5
JD		 458 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
459}
460
1adf3a3e
GR		 461static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO,
462 show_in, set_in, i_min, 0);
463static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO,
464 show_in, set_in, i_min, 1);
465static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO,
466 show_in, set_in, i_min, 2);
467static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO,
468 show_in, set_in, i_min, 3);
469static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO,
470 show_in, set_in, i_min, 4);
471static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO,
472 show_in, set_in, i_min, 5);
473static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO,
474 show_in, set_in, i_min, 6);
475static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO,
476 show_in, set_in, i_max, 0);
477static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO,
478 show_in, set_in, i_max, 1);
479static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO,
480 show_in, set_in, i_max, 2);
481static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO,
482 show_in, set_in, i_max, 3);
483static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO,
484 show_in, set_in, i_max, 4);
485static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO,
486 show_in, set_in, i_max, 5);
487static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO,
488 show_in, set_in, i_max, 6);
489static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, i_input, 0);
490static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, i_input, 1);
491static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, i_input, 2);
492static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, i_input, 3);
493static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, i_input, 4);
494static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, i_input, 5);
495static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, i_input, 6);
85b3ee07
GR		 496static SENSOR_DEVICE_ATTR_2(fan1_min, S_IWUSR | S_IRUGO,
497 show_fan, set_fan_min, f_min, 0);
498static SENSOR_DEVICE_ATTR_2(fan2_min, S_IWUSR | S_IRUGO,
499 show_fan, set_fan_min, f_min, 1);
500static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, f_input, 0);
501static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, f_input, 1);
f8181762
JD		 502static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
503 show_fan_div, set_fan_div, 0);
504static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
505 show_fan_div, set_fan_div, 1);
9711bcdd
GR		 506static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input);
507static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp,
508 set_temp, t_hot_max);
509static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp,
510 set_temp, t_hot_hyst);
511static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
512 set_temp, t_os_max);
513static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp,
514 set_temp, t_os_hyst);
1547690d 515static DEVICE_ATTR_RO(alarms);
e84542f5
JD		 516static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
517static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
518static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
519static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
520static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
521static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
522static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
523static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
524static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
525static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
526static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
1da177e4
LT		 527
528/*
529 * Real code
530 */
531
118c9a61 532static struct attribute *lm80_attrs[] = {
f8181762
JD		 533 &sensor_dev_attr_in0_min.dev_attr.attr,
534 &sensor_dev_attr_in1_min.dev_attr.attr,
535 &sensor_dev_attr_in2_min.dev_attr.attr,
536 &sensor_dev_attr_in3_min.dev_attr.attr,
537 &sensor_dev_attr_in4_min.dev_attr.attr,
538 &sensor_dev_attr_in5_min.dev_attr.attr,
539 &sensor_dev_attr_in6_min.dev_attr.attr,
540 &sensor_dev_attr_in0_max.dev_attr.attr,
541 &sensor_dev_attr_in1_max.dev_attr.attr,
542 &sensor_dev_attr_in2_max.dev_attr.attr,
543 &sensor_dev_attr_in3_max.dev_attr.attr,
544 &sensor_dev_attr_in4_max.dev_attr.attr,
545 &sensor_dev_attr_in5_max.dev_attr.attr,
546 &sensor_dev_attr_in6_max.dev_attr.attr,
547 &sensor_dev_attr_in0_input.dev_attr.attr,
548 &sensor_dev_attr_in1_input.dev_attr.attr,
549 &sensor_dev_attr_in2_input.dev_attr.attr,
550 &sensor_dev_attr_in3_input.dev_attr.attr,
551 &sensor_dev_attr_in4_input.dev_attr.attr,
552 &sensor_dev_attr_in5_input.dev_attr.attr,
553 &sensor_dev_attr_in6_input.dev_attr.attr,
554 &sensor_dev_attr_fan1_min.dev_attr.attr,
555 &sensor_dev_attr_fan2_min.dev_attr.attr,
556 &sensor_dev_attr_fan1_input.dev_attr.attr,
557 &sensor_dev_attr_fan2_input.dev_attr.attr,
558 &sensor_dev_attr_fan1_div.dev_attr.attr,
559 &sensor_dev_attr_fan2_div.dev_attr.attr,
9711bcdd
GR		 560 &sensor_dev_attr_temp1_input.dev_attr.attr,
561 &sensor_dev_attr_temp1_max.dev_attr.attr,
562 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
563 &sensor_dev_attr_temp1_crit.dev_attr.attr,
564 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
0501a381 565 &dev_attr_alarms.attr,
e84542f5
JD		 566 &sensor_dev_attr_in0_alarm.dev_attr.attr,
567 &sensor_dev_attr_in1_alarm.dev_attr.attr,
568 &sensor_dev_attr_in2_alarm.dev_attr.attr,
569 &sensor_dev_attr_in3_alarm.dev_attr.attr,
570 &sensor_dev_attr_in4_alarm.dev_attr.attr,
571 &sensor_dev_attr_in5_alarm.dev_attr.attr,
572 &sensor_dev_attr_in6_alarm.dev_attr.attr,
573 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
574 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
575 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
576 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
0501a381
MH		 577 NULL
578};
118c9a61 579ATTRIBUTE_GROUPS(lm80);
0501a381 580
8c8bacc8 581/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 582static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 583{
8c8bacc8 584 struct i2c_adapter *adapter = client->adapter;
9908ad4c
JD		 585 int i, cur, man_id, dev_id;
586 const char *name = NULL;
1da177e4
LT		 587
588 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
8c8bacc8 589 return -ENODEV;
1da177e4 590
9908ad4c
JD		 591 /* First check for unused bits, common to both chip types */
592 if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
593 || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80))
8c8bacc8 594 return -ENODEV;
9908ad4c
JD		 595
596 /*
597 * The LM96080 has manufacturer and stepping/die rev registers so we
598 * can just check that. The LM80 does not have such registers so we
599 * have to use a more expensive trick.
600 */
601 man_id = lm80_read_value(client, LM96080_REG_MAN_ID);
602 dev_id = lm80_read_value(client, LM96080_REG_DEV_ID);
603 if (man_id == 0x01 && dev_id == 0x08) {
604 /* Check more unused bits for confirmation */
605 if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe)
66b3b1f7 606 return -ENODEV;
9908ad4c
JD		 607
608 name = "lm96080";
609 } else {
610 /* Check 6-bit addressing */
611 for (i = 0x2a; i <= 0x3d; i++) {
612 cur = i2c_smbus_read_byte_data(client, i);
613 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
614 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
615 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
616 return -ENODEV;
617 }
618
619 name = "lm80";
1da177e4
LT		 620 }
621
9908ad4c 622 strlcpy(info->type, name, I2C_NAME_SIZE);
1da177e4 623
8c8bacc8
JD		 624 return 0;
625}
1da177e4 626
8c8bacc8
JD		 627static int lm80_probe(struct i2c_client *client,
628 const struct i2c_device_id *id)
629{
118c9a61
GR		 630 struct device *dev = &client->dev;
631 struct device *hwmon_dev;
8c8bacc8 632 struct lm80_data *data;
9aa3aa15 633 int rv;
8c8bacc8 634
118c9a61 635 data = devm_kzalloc(dev, sizeof(struct lm80_data), GFP_KERNEL);
c38b2820
GR		 636 if (!data)
637 return -ENOMEM;
8c8bacc8 638
118c9a61 639 data->client = client;
8c8bacc8 640 mutex_init(&data->update_lock);
1da177e4
LT		 641
642 /* Initialize the LM80 chip */
6cc37ee5 643 lm80_init_client(client);
1da177e4
LT		 644
645 /* A few vars need to be filled upon startup */
9aa3aa15
KL		 646 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
647 if (rv < 0)
648 return rv;
649 data->fan[f_min][0] = rv;
650 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
651 if (rv < 0)
652 return rv;
653 data->fan[f_min][1] = rv;
1da177e4 654
118c9a61
GR		 655 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
656 data, lm80_groups);
943b0830 657
118c9a61 658 return PTR_ERR_OR_ZERO(hwmon_dev);
1da177e4
LT		 659}
660
c254ffde
GR		 661/*
662 * Driver data (common to all clients)
663 */
1da177e4 664
c254ffde
GR		 665static const struct i2c_device_id lm80_id[] = {
666 { "lm80", 0 },
667 { "lm96080", 1 },
668 { }
669};
670MODULE_DEVICE_TABLE(i2c, lm80_id);
1da177e4 671
c254ffde
GR		 672static struct i2c_driver lm80_driver = {
673 .class = I2C_CLASS_HWMON,
674 .driver = {
675 .name = "lm80",
676 },
677 .probe = lm80_probe,
678 .id_table = lm80_id,
679 .detect = lm80_detect,
680 .address_list = normal_i2c,
681};
1da177e4 682
f0967eea 683module_i2c_driver(lm80_driver);
1da177e4
LT		 684
685MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
686 "Philip Edelbrock <phil@netroedge.com>");
687MODULE_DESCRIPTION("LM80 driver");
688MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)