Loading...
1/*
2 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
5 * Kyösti Mälkki <kmalkki@cc.hut.fi>
6 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 */
23
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>
29#include <linux/hwmon.h>
30#include <linux/hwmon-sysfs.h>
31#include <linux/hwmon-vid.h>
32#include <linux/err.h>
33#include <linux/mutex.h>
34#include <linux/sysfs.h>
35
36/* Type of the extra sensor */
37static unsigned short extra_sensor_type;
38module_param(extra_sensor_type, ushort, 0);
39MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
40
41/* Addresses to scan */
42static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
43
44/*
45 * Many GL520 constants specified below
46 * One of the inputs can be configured as either temp or voltage.
47 * That's why _TEMP2 and _IN4 access the same register
48 */
49
50/* The GL520 registers */
51#define GL520_REG_CHIP_ID 0x00
52#define GL520_REG_REVISION 0x01
53#define GL520_REG_CONF 0x03
54#define GL520_REG_MASK 0x11
55
56#define GL520_REG_VID_INPUT 0x02
57
58static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
59static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
60static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
61static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
62
63static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
64static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
65static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
66
67#define GL520_REG_FAN_INPUT 0x07
68#define GL520_REG_FAN_MIN 0x08
69#define GL520_REG_FAN_DIV 0x0f
70#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
71
72#define GL520_REG_ALARMS 0x12
73#define GL520_REG_BEEP_MASK 0x10
74#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
75
76/*
77 * Function declarations
78 */
79
80static int gl520_probe(struct i2c_client *client,
81 const struct i2c_device_id *id);
82static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
83static void gl520_init_client(struct i2c_client *client);
84static int gl520_remove(struct i2c_client *client);
85static int gl520_read_value(struct i2c_client *client, u8 reg);
86static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
87static struct gl520_data *gl520_update_device(struct device *dev);
88
89/* Driver data */
90static const struct i2c_device_id gl520_id[] = {
91 { "gl520sm", 0 },
92 { }
93};
94MODULE_DEVICE_TABLE(i2c, gl520_id);
95
96static struct i2c_driver gl520_driver = {
97 .class = I2C_CLASS_HWMON,
98 .driver = {
99 .name = "gl520sm",
100 },
101 .probe = gl520_probe,
102 .remove = gl520_remove,
103 .id_table = gl520_id,
104 .detect = gl520_detect,
105 .address_list = normal_i2c,
106};
107
108/* Client data */
109struct gl520_data {
110 struct device *hwmon_dev;
111 struct mutex update_lock;
112 char valid; /* zero until the following fields are valid */
113 unsigned long last_updated; /* in jiffies */
114
115 u8 vid;
116 u8 vrm;
117 u8 in_input[5]; /* [0] = VVD */
118 u8 in_min[5]; /* [0] = VDD */
119 u8 in_max[5]; /* [0] = VDD */
120 u8 fan_input[2];
121 u8 fan_min[2];
122 u8 fan_div[2];
123 u8 fan_off;
124 u8 temp_input[2];
125 u8 temp_max[2];
126 u8 temp_max_hyst[2];
127 u8 alarms;
128 u8 beep_enable;
129 u8 beep_mask;
130 u8 alarm_mask;
131 u8 two_temps;
132};
133
134/*
135 * Sysfs stuff
136 */
137
138static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
139 char *buf)
140{
141 struct gl520_data *data = gl520_update_device(dev);
142 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
143}
144static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
145
146#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
147#define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255)
148
149#define IN_FROM_REG(val) ((val) * 19)
150#define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255)
151
152static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
153 char *buf)
154{
155 int n = to_sensor_dev_attr(attr)->index;
156 struct gl520_data *data = gl520_update_device(dev);
157 u8 r = data->in_input[n];
158
159 if (n == 0)
160 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
161 else
162 return sprintf(buf, "%d\n", IN_FROM_REG(r));
163}
164
165static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
166 char *buf)
167{
168 int n = to_sensor_dev_attr(attr)->index;
169 struct gl520_data *data = gl520_update_device(dev);
170 u8 r = data->in_min[n];
171
172 if (n == 0)
173 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
174 else
175 return sprintf(buf, "%d\n", IN_FROM_REG(r));
176}
177
178static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
179 char *buf)
180{
181 int n = to_sensor_dev_attr(attr)->index;
182 struct gl520_data *data = gl520_update_device(dev);
183 u8 r = data->in_max[n];
184
185 if (n == 0)
186 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
187 else
188 return sprintf(buf, "%d\n", IN_FROM_REG(r));
189}
190
191static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
192 const char *buf, size_t count)
193{
194 struct i2c_client *client = to_i2c_client(dev);
195 struct gl520_data *data = i2c_get_clientdata(client);
196 int n = to_sensor_dev_attr(attr)->index;
197 u8 r;
198 long v;
199 int err;
200
201 err = kstrtol(buf, 10, &v);
202 if (err)
203 return err;
204
205 mutex_lock(&data->update_lock);
206
207 if (n == 0)
208 r = VDD_TO_REG(v);
209 else
210 r = IN_TO_REG(v);
211
212 data->in_min[n] = r;
213
214 if (n < 4)
215 gl520_write_value(client, GL520_REG_IN_MIN[n],
216 (gl520_read_value(client, GL520_REG_IN_MIN[n])
217 & ~0xff) | r);
218 else
219 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
220
221 mutex_unlock(&data->update_lock);
222 return count;
223}
224
225static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
227{
228 struct i2c_client *client = to_i2c_client(dev);
229 struct gl520_data *data = i2c_get_clientdata(client);
230 int n = to_sensor_dev_attr(attr)->index;
231 u8 r;
232 long v;
233 int err;
234
235 err = kstrtol(buf, 10, &v);
236 if (err)
237 return err;
238
239 if (n == 0)
240 r = VDD_TO_REG(v);
241 else
242 r = IN_TO_REG(v);
243
244 mutex_lock(&data->update_lock);
245
246 data->in_max[n] = r;
247
248 if (n < 4)
249 gl520_write_value(client, GL520_REG_IN_MAX[n],
250 (gl520_read_value(client, GL520_REG_IN_MAX[n])
251 & ~0xff00) | (r << 8));
252 else
253 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
254
255 mutex_unlock(&data->update_lock);
256 return count;
257}
258
259static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
260static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
261static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
262static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
263static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
264static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
265 get_in_min, set_in_min, 0);
266static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
267 get_in_min, set_in_min, 1);
268static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
269 get_in_min, set_in_min, 2);
270static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
271 get_in_min, set_in_min, 3);
272static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
273 get_in_min, set_in_min, 4);
274static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
275 get_in_max, set_in_max, 0);
276static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
277 get_in_max, set_in_max, 1);
278static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
279 get_in_max, set_in_max, 2);
280static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
281 get_in_max, set_in_max, 3);
282static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
283 get_in_max, set_in_max, 4);
284
285#define DIV_FROM_REG(val) (1 << (val))
286#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
287#define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \
288 clamp_val((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
289
290static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
291 char *buf)
292{
293 int n = to_sensor_dev_attr(attr)->index;
294 struct gl520_data *data = gl520_update_device(dev);
295
296 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
297 data->fan_div[n]));
298}
299
300static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
301 char *buf)
302{
303 int n = to_sensor_dev_attr(attr)->index;
304 struct gl520_data *data = gl520_update_device(dev);
305
306 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
307 data->fan_div[n]));
308}
309
310static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
311 char *buf)
312{
313 int n = to_sensor_dev_attr(attr)->index;
314 struct gl520_data *data = gl520_update_device(dev);
315
316 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
317}
318
319static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
320 char *buf)
321{
322 struct gl520_data *data = gl520_update_device(dev);
323 return sprintf(buf, "%d\n", data->fan_off);
324}
325
326static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
327 const char *buf, size_t count)
328{
329 struct i2c_client *client = to_i2c_client(dev);
330 struct gl520_data *data = i2c_get_clientdata(client);
331 int n = to_sensor_dev_attr(attr)->index;
332 u8 r;
333 unsigned long v;
334 int err;
335
336 err = kstrtoul(buf, 10, &v);
337 if (err)
338 return err;
339
340 mutex_lock(&data->update_lock);
341 r = FAN_TO_REG(v, data->fan_div[n]);
342 data->fan_min[n] = r;
343
344 if (n == 0)
345 gl520_write_value(client, GL520_REG_FAN_MIN,
346 (gl520_read_value(client, GL520_REG_FAN_MIN)
347 & ~0xff00) | (r << 8));
348 else
349 gl520_write_value(client, GL520_REG_FAN_MIN,
350 (gl520_read_value(client, GL520_REG_FAN_MIN)
351 & ~0xff) | r);
352
353 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
354 if (data->fan_min[n] == 0)
355 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
356 else
357 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
358 data->beep_mask &= data->alarm_mask;
359 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
360
361 mutex_unlock(&data->update_lock);
362 return count;
363}
364
365static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
366 const char *buf, size_t count)
367{
368 struct i2c_client *client = to_i2c_client(dev);
369 struct gl520_data *data = i2c_get_clientdata(client);
370 int n = to_sensor_dev_attr(attr)->index;
371 u8 r;
372 unsigned long v;
373 int err;
374
375 err = kstrtoul(buf, 10, &v);
376 if (err)
377 return err;
378
379 switch (v) {
380 case 1:
381 r = 0;
382 break;
383 case 2:
384 r = 1;
385 break;
386 case 4:
387 r = 2;
388 break;
389 case 8:
390 r = 3;
391 break;
392 default:
393 dev_err(&client->dev,
394 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
395 return -EINVAL;
396 }
397
398 mutex_lock(&data->update_lock);
399 data->fan_div[n] = r;
400
401 if (n == 0)
402 gl520_write_value(client, GL520_REG_FAN_DIV,
403 (gl520_read_value(client, GL520_REG_FAN_DIV)
404 & ~0xc0) | (r << 6));
405 else
406 gl520_write_value(client, GL520_REG_FAN_DIV,
407 (gl520_read_value(client, GL520_REG_FAN_DIV)
408 & ~0x30) | (r << 4));
409
410 mutex_unlock(&data->update_lock);
411 return count;
412}
413
414static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
415 const char *buf, size_t count)
416{
417 struct i2c_client *client = to_i2c_client(dev);
418 struct gl520_data *data = i2c_get_clientdata(client);
419 u8 r;
420 unsigned long v;
421 int err;
422
423 err = kstrtoul(buf, 10, &v);
424 if (err)
425 return err;
426
427 r = (v ? 1 : 0);
428
429 mutex_lock(&data->update_lock);
430 data->fan_off = r;
431 gl520_write_value(client, GL520_REG_FAN_OFF,
432 (gl520_read_value(client, GL520_REG_FAN_OFF)
433 & ~0x0c) | (r << 2));
434 mutex_unlock(&data->update_lock);
435 return count;
436}
437
438static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
439static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
440static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
441 get_fan_min, set_fan_min, 0);
442static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
443 get_fan_min, set_fan_min, 1);
444static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
445 get_fan_div, set_fan_div, 0);
446static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
447 get_fan_div, set_fan_div, 1);
448static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
449 get_fan_off, set_fan_off);
450
451#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
452#define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \
453 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
454
455static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
456 char *buf)
457{
458 int n = to_sensor_dev_attr(attr)->index;
459 struct gl520_data *data = gl520_update_device(dev);
460
461 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
462}
463
464static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
465 char *buf)
466{
467 int n = to_sensor_dev_attr(attr)->index;
468 struct gl520_data *data = gl520_update_device(dev);
469
470 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
471}
472
473static ssize_t get_temp_max_hyst(struct device *dev,
474 struct device_attribute *attr, char *buf)
475{
476 int n = to_sensor_dev_attr(attr)->index;
477 struct gl520_data *data = gl520_update_device(dev);
478
479 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
480}
481
482static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
483 const char *buf, size_t count)
484{
485 struct i2c_client *client = to_i2c_client(dev);
486 struct gl520_data *data = i2c_get_clientdata(client);
487 int n = to_sensor_dev_attr(attr)->index;
488 long v;
489 int err;
490
491 err = kstrtol(buf, 10, &v);
492 if (err)
493 return err;
494
495 mutex_lock(&data->update_lock);
496 data->temp_max[n] = TEMP_TO_REG(v);
497 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
498 mutex_unlock(&data->update_lock);
499 return count;
500}
501
502static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
503 *attr, const char *buf, size_t count)
504{
505 struct i2c_client *client = to_i2c_client(dev);
506 struct gl520_data *data = i2c_get_clientdata(client);
507 int n = to_sensor_dev_attr(attr)->index;
508 long v;
509 int err;
510
511 err = kstrtol(buf, 10, &v);
512 if (err)
513 return err;
514
515 mutex_lock(&data->update_lock);
516 data->temp_max_hyst[n] = TEMP_TO_REG(v);
517 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
518 data->temp_max_hyst[n]);
519 mutex_unlock(&data->update_lock);
520 return count;
521}
522
523static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
524static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
525static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
526 get_temp_max, set_temp_max, 0);
527static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
528 get_temp_max, set_temp_max, 1);
529static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
530 get_temp_max_hyst, set_temp_max_hyst, 0);
531static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
532 get_temp_max_hyst, set_temp_max_hyst, 1);
533
534static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
535 char *buf)
536{
537 struct gl520_data *data = gl520_update_device(dev);
538 return sprintf(buf, "%d\n", data->alarms);
539}
540
541static ssize_t get_beep_enable(struct device *dev, struct device_attribute
542 *attr, char *buf)
543{
544 struct gl520_data *data = gl520_update_device(dev);
545 return sprintf(buf, "%d\n", data->beep_enable);
546}
547
548static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
549 char *buf)
550{
551 struct gl520_data *data = gl520_update_device(dev);
552 return sprintf(buf, "%d\n", data->beep_mask);
553}
554
555static ssize_t set_beep_enable(struct device *dev, struct device_attribute
556 *attr, const char *buf, size_t count)
557{
558 struct i2c_client *client = to_i2c_client(dev);
559 struct gl520_data *data = i2c_get_clientdata(client);
560 u8 r;
561 unsigned long v;
562 int err;
563
564 err = kstrtoul(buf, 10, &v);
565 if (err)
566 return err;
567
568 r = (v ? 0 : 1);
569
570 mutex_lock(&data->update_lock);
571 data->beep_enable = !r;
572 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
573 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
574 & ~0x04) | (r << 2));
575 mutex_unlock(&data->update_lock);
576 return count;
577}
578
579static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
580 const char *buf, size_t count)
581{
582 struct i2c_client *client = to_i2c_client(dev);
583 struct gl520_data *data = i2c_get_clientdata(client);
584 unsigned long r;
585 int err;
586
587 err = kstrtoul(buf, 10, &r);
588 if (err)
589 return err;
590
591 mutex_lock(&data->update_lock);
592 r &= data->alarm_mask;
593 data->beep_mask = r;
594 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
595 mutex_unlock(&data->update_lock);
596 return count;
597}
598
599static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
600static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
601 get_beep_enable, set_beep_enable);
602static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
603 get_beep_mask, set_beep_mask);
604
605static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 int bit_nr = to_sensor_dev_attr(attr)->index;
609 struct gl520_data *data = gl520_update_device(dev);
610
611 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
612}
613
614static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
615static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
616static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
617static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
618static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
619static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
620static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
621static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
622static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
623
624static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
625 char *buf)
626{
627 int bitnr = to_sensor_dev_attr(attr)->index;
628 struct gl520_data *data = gl520_update_device(dev);
629
630 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
631}
632
633static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
634 const char *buf, size_t count)
635{
636 struct i2c_client *client = to_i2c_client(dev);
637 struct gl520_data *data = i2c_get_clientdata(client);
638 int bitnr = to_sensor_dev_attr(attr)->index;
639 unsigned long bit;
640
641 int err;
642
643 err = kstrtoul(buf, 10, &bit);
644 if (err)
645 return err;
646 if (bit & ~1)
647 return -EINVAL;
648
649 mutex_lock(&data->update_lock);
650 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
651 if (bit)
652 data->beep_mask |= (1 << bitnr);
653 else
654 data->beep_mask &= ~(1 << bitnr);
655 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
656 mutex_unlock(&data->update_lock);
657 return count;
658}
659
660static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
661static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
662static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
663static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
664static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
665static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
666static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
667static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
668static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
669
670static struct attribute *gl520_attributes[] = {
671 &dev_attr_cpu0_vid.attr,
672
673 &sensor_dev_attr_in0_input.dev_attr.attr,
674 &sensor_dev_attr_in0_min.dev_attr.attr,
675 &sensor_dev_attr_in0_max.dev_attr.attr,
676 &sensor_dev_attr_in0_alarm.dev_attr.attr,
677 &sensor_dev_attr_in0_beep.dev_attr.attr,
678 &sensor_dev_attr_in1_input.dev_attr.attr,
679 &sensor_dev_attr_in1_min.dev_attr.attr,
680 &sensor_dev_attr_in1_max.dev_attr.attr,
681 &sensor_dev_attr_in1_alarm.dev_attr.attr,
682 &sensor_dev_attr_in1_beep.dev_attr.attr,
683 &sensor_dev_attr_in2_input.dev_attr.attr,
684 &sensor_dev_attr_in2_min.dev_attr.attr,
685 &sensor_dev_attr_in2_max.dev_attr.attr,
686 &sensor_dev_attr_in2_alarm.dev_attr.attr,
687 &sensor_dev_attr_in2_beep.dev_attr.attr,
688 &sensor_dev_attr_in3_input.dev_attr.attr,
689 &sensor_dev_attr_in3_min.dev_attr.attr,
690 &sensor_dev_attr_in3_max.dev_attr.attr,
691 &sensor_dev_attr_in3_alarm.dev_attr.attr,
692 &sensor_dev_attr_in3_beep.dev_attr.attr,
693
694 &sensor_dev_attr_fan1_input.dev_attr.attr,
695 &sensor_dev_attr_fan1_min.dev_attr.attr,
696 &sensor_dev_attr_fan1_div.dev_attr.attr,
697 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
698 &sensor_dev_attr_fan1_beep.dev_attr.attr,
699 &dev_attr_fan1_off.attr,
700 &sensor_dev_attr_fan2_input.dev_attr.attr,
701 &sensor_dev_attr_fan2_min.dev_attr.attr,
702 &sensor_dev_attr_fan2_div.dev_attr.attr,
703 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
704 &sensor_dev_attr_fan2_beep.dev_attr.attr,
705
706 &sensor_dev_attr_temp1_input.dev_attr.attr,
707 &sensor_dev_attr_temp1_max.dev_attr.attr,
708 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
709 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
710 &sensor_dev_attr_temp1_beep.dev_attr.attr,
711
712 &dev_attr_alarms.attr,
713 &dev_attr_beep_enable.attr,
714 &dev_attr_beep_mask.attr,
715 NULL
716};
717
718static const struct attribute_group gl520_group = {
719 .attrs = gl520_attributes,
720};
721
722static struct attribute *gl520_attributes_in4[] = {
723 &sensor_dev_attr_in4_input.dev_attr.attr,
724 &sensor_dev_attr_in4_min.dev_attr.attr,
725 &sensor_dev_attr_in4_max.dev_attr.attr,
726 &sensor_dev_attr_in4_alarm.dev_attr.attr,
727 &sensor_dev_attr_in4_beep.dev_attr.attr,
728 NULL
729};
730
731static struct attribute *gl520_attributes_temp2[] = {
732 &sensor_dev_attr_temp2_input.dev_attr.attr,
733 &sensor_dev_attr_temp2_max.dev_attr.attr,
734 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
735 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
736 &sensor_dev_attr_temp2_beep.dev_attr.attr,
737 NULL
738};
739
740static const struct attribute_group gl520_group_in4 = {
741 .attrs = gl520_attributes_in4,
742};
743
744static const struct attribute_group gl520_group_temp2 = {
745 .attrs = gl520_attributes_temp2,
746};
747
748
749/*
750 * Real code
751 */
752
753/* Return 0 if detection is successful, -ENODEV otherwise */
754static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
755{
756 struct i2c_adapter *adapter = client->adapter;
757
758 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
759 I2C_FUNC_SMBUS_WORD_DATA))
760 return -ENODEV;
761
762 /* Determine the chip type. */
763 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
764 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
765 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
766 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
767 return -ENODEV;
768 }
769
770 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
771
772 return 0;
773}
774
775static int gl520_probe(struct i2c_client *client,
776 const struct i2c_device_id *id)
777{
778 struct gl520_data *data;
779 int err;
780
781 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data),
782 GFP_KERNEL);
783 if (!data)
784 return -ENOMEM;
785
786 i2c_set_clientdata(client, data);
787 mutex_init(&data->update_lock);
788
789 /* Initialize the GL520SM chip */
790 gl520_init_client(client);
791
792 /* Register sysfs hooks */
793 err = sysfs_create_group(&client->dev.kobj, &gl520_group);
794 if (err)
795 return err;
796
797 if (data->two_temps)
798 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
799 else
800 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
801
802 if (err)
803 goto exit_remove_files;
804
805 data->hwmon_dev = hwmon_device_register(&client->dev);
806 if (IS_ERR(data->hwmon_dev)) {
807 err = PTR_ERR(data->hwmon_dev);
808 goto exit_remove_files;
809 }
810
811 return 0;
812
813exit_remove_files:
814 sysfs_remove_group(&client->dev.kobj, &gl520_group);
815 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
816 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
817 return err;
818}
819
820
821/* Called when we have found a new GL520SM. */
822static void gl520_init_client(struct i2c_client *client)
823{
824 struct gl520_data *data = i2c_get_clientdata(client);
825 u8 oldconf, conf;
826
827 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
828
829 data->alarm_mask = 0xff;
830 data->vrm = vid_which_vrm();
831
832 if (extra_sensor_type == 1)
833 conf &= ~0x10;
834 else if (extra_sensor_type == 2)
835 conf |= 0x10;
836 data->two_temps = !(conf & 0x10);
837
838 /* If IRQ# is disabled, we can safely force comparator mode */
839 if (!(conf & 0x20))
840 conf &= 0xf7;
841
842 /* Enable monitoring if needed */
843 conf |= 0x40;
844
845 if (conf != oldconf)
846 gl520_write_value(client, GL520_REG_CONF, conf);
847
848 gl520_update_device(&(client->dev));
849
850 if (data->fan_min[0] == 0)
851 data->alarm_mask &= ~0x20;
852 if (data->fan_min[1] == 0)
853 data->alarm_mask &= ~0x40;
854
855 data->beep_mask &= data->alarm_mask;
856 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
857}
858
859static int gl520_remove(struct i2c_client *client)
860{
861 struct gl520_data *data = i2c_get_clientdata(client);
862
863 hwmon_device_unregister(data->hwmon_dev);
864 sysfs_remove_group(&client->dev.kobj, &gl520_group);
865 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
866 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
867
868 return 0;
869}
870
871
872/*
873 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
874 * GL520 uses a high-byte first convention
875 */
876static int gl520_read_value(struct i2c_client *client, u8 reg)
877{
878 if ((reg >= 0x07) && (reg <= 0x0c))
879 return i2c_smbus_read_word_swapped(client, reg);
880 else
881 return i2c_smbus_read_byte_data(client, reg);
882}
883
884static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
885{
886 if ((reg >= 0x07) && (reg <= 0x0c))
887 return i2c_smbus_write_word_swapped(client, reg, value);
888 else
889 return i2c_smbus_write_byte_data(client, reg, value);
890}
891
892
893static struct gl520_data *gl520_update_device(struct device *dev)
894{
895 struct i2c_client *client = to_i2c_client(dev);
896 struct gl520_data *data = i2c_get_clientdata(client);
897 int val, i;
898
899 mutex_lock(&data->update_lock);
900
901 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
902
903 dev_dbg(&client->dev, "Starting gl520sm update\n");
904
905 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
906 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
907 data->vid = gl520_read_value(client,
908 GL520_REG_VID_INPUT) & 0x1f;
909
910 for (i = 0; i < 4; i++) {
911 data->in_input[i] = gl520_read_value(client,
912 GL520_REG_IN_INPUT[i]);
913 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
914 data->in_min[i] = val & 0xff;
915 data->in_max[i] = (val >> 8) & 0xff;
916 }
917
918 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
919 data->fan_input[0] = (val >> 8) & 0xff;
920 data->fan_input[1] = val & 0xff;
921
922 val = gl520_read_value(client, GL520_REG_FAN_MIN);
923 data->fan_min[0] = (val >> 8) & 0xff;
924 data->fan_min[1] = val & 0xff;
925
926 data->temp_input[0] = gl520_read_value(client,
927 GL520_REG_TEMP_INPUT[0]);
928 data->temp_max[0] = gl520_read_value(client,
929 GL520_REG_TEMP_MAX[0]);
930 data->temp_max_hyst[0] = gl520_read_value(client,
931 GL520_REG_TEMP_MAX_HYST[0]);
932
933 val = gl520_read_value(client, GL520_REG_FAN_DIV);
934 data->fan_div[0] = (val >> 6) & 0x03;
935 data->fan_div[1] = (val >> 4) & 0x03;
936 data->fan_off = (val >> 2) & 0x01;
937
938 data->alarms &= data->alarm_mask;
939
940 val = gl520_read_value(client, GL520_REG_CONF);
941 data->beep_enable = !((val >> 2) & 1);
942
943 /* Temp1 and Vin4 are the same input */
944 if (data->two_temps) {
945 data->temp_input[1] = gl520_read_value(client,
946 GL520_REG_TEMP_INPUT[1]);
947 data->temp_max[1] = gl520_read_value(client,
948 GL520_REG_TEMP_MAX[1]);
949 data->temp_max_hyst[1] = gl520_read_value(client,
950 GL520_REG_TEMP_MAX_HYST[1]);
951 } else {
952 data->in_input[4] = gl520_read_value(client,
953 GL520_REG_IN_INPUT[4]);
954 data->in_min[4] = gl520_read_value(client,
955 GL520_REG_IN_MIN[4]);
956 data->in_max[4] = gl520_read_value(client,
957 GL520_REG_IN_MAX[4]);
958 }
959
960 data->last_updated = jiffies;
961 data->valid = 1;
962 }
963
964 mutex_unlock(&data->update_lock);
965
966 return data;
967}
968
969module_i2c_driver(gl520_driver);
970
971MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
972 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
973 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
974MODULE_DESCRIPTION("GL520SM driver");
975MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
4 * monitoring
5 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
6 * Kyösti Mälkki <kmalkki@cc.hut.fi>
7 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
8 */
9
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/jiffies.h>
14#include <linux/i2c.h>
15#include <linux/hwmon.h>
16#include <linux/hwmon-sysfs.h>
17#include <linux/hwmon-vid.h>
18#include <linux/err.h>
19#include <linux/mutex.h>
20#include <linux/sysfs.h>
21
22/* Type of the extra sensor */
23static unsigned short extra_sensor_type;
24module_param(extra_sensor_type, ushort, 0);
25MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
26
27/* Addresses to scan */
28static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
29
30/*
31 * Many GL520 constants specified below
32 * One of the inputs can be configured as either temp or voltage.
33 * That's why _TEMP2 and _IN4 access the same register
34 */
35
36/* The GL520 registers */
37#define GL520_REG_CHIP_ID 0x00
38#define GL520_REG_REVISION 0x01
39#define GL520_REG_CONF 0x03
40#define GL520_REG_MASK 0x11
41
42#define GL520_REG_VID_INPUT 0x02
43
44static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
45static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
46static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
47static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
48
49static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
50static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
51static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
52
53#define GL520_REG_FAN_INPUT 0x07
54#define GL520_REG_FAN_MIN 0x08
55#define GL520_REG_FAN_DIV 0x0f
56#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
57
58#define GL520_REG_ALARMS 0x12
59#define GL520_REG_BEEP_MASK 0x10
60#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
61
62/* Client data */
63struct gl520_data {
64 struct i2c_client *client;
65 const struct attribute_group *groups[3];
66 struct mutex update_lock;
67 bool valid; /* false until the following fields are valid */
68 unsigned long last_updated; /* in jiffies */
69
70 u8 vid;
71 u8 vrm;
72 u8 in_input[5]; /* [0] = VVD */
73 u8 in_min[5]; /* [0] = VDD */
74 u8 in_max[5]; /* [0] = VDD */
75 u8 fan_input[2];
76 u8 fan_min[2];
77 u8 fan_div[2];
78 u8 fan_off;
79 u8 temp_input[2];
80 u8 temp_max[2];
81 u8 temp_max_hyst[2];
82 u8 alarms;
83 u8 beep_enable;
84 u8 beep_mask;
85 u8 alarm_mask;
86 u8 two_temps;
87};
88
89/*
90 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
91 * GL520 uses a high-byte first convention
92 */
93static int gl520_read_value(struct i2c_client *client, u8 reg)
94{
95 if ((reg >= 0x07) && (reg <= 0x0c))
96 return i2c_smbus_read_word_swapped(client, reg);
97 else
98 return i2c_smbus_read_byte_data(client, reg);
99}
100
101static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
102{
103 if ((reg >= 0x07) && (reg <= 0x0c))
104 return i2c_smbus_write_word_swapped(client, reg, value);
105 else
106 return i2c_smbus_write_byte_data(client, reg, value);
107}
108
109static struct gl520_data *gl520_update_device(struct device *dev)
110{
111 struct gl520_data *data = dev_get_drvdata(dev);
112 struct i2c_client *client = data->client;
113 int val, i;
114
115 mutex_lock(&data->update_lock);
116
117 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
118
119 dev_dbg(&client->dev, "Starting gl520sm update\n");
120
121 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
122 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
123 data->vid = gl520_read_value(client,
124 GL520_REG_VID_INPUT) & 0x1f;
125
126 for (i = 0; i < 4; i++) {
127 data->in_input[i] = gl520_read_value(client,
128 GL520_REG_IN_INPUT[i]);
129 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
130 data->in_min[i] = val & 0xff;
131 data->in_max[i] = (val >> 8) & 0xff;
132 }
133
134 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
135 data->fan_input[0] = (val >> 8) & 0xff;
136 data->fan_input[1] = val & 0xff;
137
138 val = gl520_read_value(client, GL520_REG_FAN_MIN);
139 data->fan_min[0] = (val >> 8) & 0xff;
140 data->fan_min[1] = val & 0xff;
141
142 data->temp_input[0] = gl520_read_value(client,
143 GL520_REG_TEMP_INPUT[0]);
144 data->temp_max[0] = gl520_read_value(client,
145 GL520_REG_TEMP_MAX[0]);
146 data->temp_max_hyst[0] = gl520_read_value(client,
147 GL520_REG_TEMP_MAX_HYST[0]);
148
149 val = gl520_read_value(client, GL520_REG_FAN_DIV);
150 data->fan_div[0] = (val >> 6) & 0x03;
151 data->fan_div[1] = (val >> 4) & 0x03;
152 data->fan_off = (val >> 2) & 0x01;
153
154 data->alarms &= data->alarm_mask;
155
156 val = gl520_read_value(client, GL520_REG_CONF);
157 data->beep_enable = !((val >> 2) & 1);
158
159 /* Temp1 and Vin4 are the same input */
160 if (data->two_temps) {
161 data->temp_input[1] = gl520_read_value(client,
162 GL520_REG_TEMP_INPUT[1]);
163 data->temp_max[1] = gl520_read_value(client,
164 GL520_REG_TEMP_MAX[1]);
165 data->temp_max_hyst[1] = gl520_read_value(client,
166 GL520_REG_TEMP_MAX_HYST[1]);
167 } else {
168 data->in_input[4] = gl520_read_value(client,
169 GL520_REG_IN_INPUT[4]);
170 data->in_min[4] = gl520_read_value(client,
171 GL520_REG_IN_MIN[4]);
172 data->in_max[4] = gl520_read_value(client,
173 GL520_REG_IN_MAX[4]);
174 }
175
176 data->last_updated = jiffies;
177 data->valid = true;
178 }
179
180 mutex_unlock(&data->update_lock);
181
182 return data;
183}
184
185/*
186 * Sysfs stuff
187 */
188
189static ssize_t cpu0_vid_show(struct device *dev,
190 struct device_attribute *attr, char *buf)
191{
192 struct gl520_data *data = gl520_update_device(dev);
193 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
194}
195static DEVICE_ATTR_RO(cpu0_vid);
196
197#define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4)
198#define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4)
199#define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
200
201#define IN_FROM_REG(val) ((val) * 19)
202#define IN_CLAMP(val) clamp_val(val, 0, 255 * 19)
203#define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
204
205static ssize_t in_input_show(struct device *dev,
206 struct device_attribute *attr, char *buf)
207{
208 int n = to_sensor_dev_attr(attr)->index;
209 struct gl520_data *data = gl520_update_device(dev);
210 u8 r = data->in_input[n];
211
212 if (n == 0)
213 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
214 else
215 return sprintf(buf, "%d\n", IN_FROM_REG(r));
216}
217
218static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
219 char *buf)
220{
221 int n = to_sensor_dev_attr(attr)->index;
222 struct gl520_data *data = gl520_update_device(dev);
223 u8 r = data->in_min[n];
224
225 if (n == 0)
226 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
227 else
228 return sprintf(buf, "%d\n", IN_FROM_REG(r));
229}
230
231static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
232 char *buf)
233{
234 int n = to_sensor_dev_attr(attr)->index;
235 struct gl520_data *data = gl520_update_device(dev);
236 u8 r = data->in_max[n];
237
238 if (n == 0)
239 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
240 else
241 return sprintf(buf, "%d\n", IN_FROM_REG(r));
242}
243
244static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
245 const char *buf, size_t count)
246{
247 struct gl520_data *data = dev_get_drvdata(dev);
248 struct i2c_client *client = data->client;
249 int n = to_sensor_dev_attr(attr)->index;
250 u8 r;
251 long v;
252 int err;
253
254 err = kstrtol(buf, 10, &v);
255 if (err)
256 return err;
257
258 mutex_lock(&data->update_lock);
259
260 if (n == 0)
261 r = VDD_TO_REG(v);
262 else
263 r = IN_TO_REG(v);
264
265 data->in_min[n] = r;
266
267 if (n < 4)
268 gl520_write_value(client, GL520_REG_IN_MIN[n],
269 (gl520_read_value(client, GL520_REG_IN_MIN[n])
270 & ~0xff) | r);
271 else
272 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
273
274 mutex_unlock(&data->update_lock);
275 return count;
276}
277
278static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
279 const char *buf, size_t count)
280{
281 struct gl520_data *data = dev_get_drvdata(dev);
282 struct i2c_client *client = data->client;
283 int n = to_sensor_dev_attr(attr)->index;
284 u8 r;
285 long v;
286 int err;
287
288 err = kstrtol(buf, 10, &v);
289 if (err)
290 return err;
291
292 if (n == 0)
293 r = VDD_TO_REG(v);
294 else
295 r = IN_TO_REG(v);
296
297 mutex_lock(&data->update_lock);
298
299 data->in_max[n] = r;
300
301 if (n < 4)
302 gl520_write_value(client, GL520_REG_IN_MAX[n],
303 (gl520_read_value(client, GL520_REG_IN_MAX[n])
304 & ~0xff00) | (r << 8));
305 else
306 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
307
308 mutex_unlock(&data->update_lock);
309 return count;
310}
311
312static SENSOR_DEVICE_ATTR_RO(in0_input, in_input, 0);
313static SENSOR_DEVICE_ATTR_RO(in1_input, in_input, 1);
314static SENSOR_DEVICE_ATTR_RO(in2_input, in_input, 2);
315static SENSOR_DEVICE_ATTR_RO(in3_input, in_input, 3);
316static SENSOR_DEVICE_ATTR_RO(in4_input, in_input, 4);
317static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
318static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
319static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
320static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
321static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
322static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
323static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
324static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
325static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
326static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
327
328#define DIV_FROM_REG(val) (1 << (val))
329#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
330
331#define FAN_BASE(div) (480000 >> (div))
332#define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \
333 FAN_BASE(div))
334#define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \
335 DIV_ROUND_CLOSEST(480000, \
336 FAN_CLAMP(val, div) << (div)))
337
338static ssize_t fan_input_show(struct device *dev,
339 struct device_attribute *attr, char *buf)
340{
341 int n = to_sensor_dev_attr(attr)->index;
342 struct gl520_data *data = gl520_update_device(dev);
343
344 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
345 data->fan_div[n]));
346}
347
348static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
349 char *buf)
350{
351 int n = to_sensor_dev_attr(attr)->index;
352 struct gl520_data *data = gl520_update_device(dev);
353
354 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
355 data->fan_div[n]));
356}
357
358static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
359 char *buf)
360{
361 int n = to_sensor_dev_attr(attr)->index;
362 struct gl520_data *data = gl520_update_device(dev);
363
364 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
365}
366
367static ssize_t fan1_off_show(struct device *dev,
368 struct device_attribute *attr, char *buf)
369{
370 struct gl520_data *data = gl520_update_device(dev);
371 return sprintf(buf, "%d\n", data->fan_off);
372}
373
374static ssize_t fan_min_store(struct device *dev,
375 struct device_attribute *attr, const char *buf,
376 size_t count)
377{
378 struct gl520_data *data = dev_get_drvdata(dev);
379 struct i2c_client *client = data->client;
380 int n = to_sensor_dev_attr(attr)->index;
381 u8 r;
382 unsigned long v;
383 int err;
384
385 err = kstrtoul(buf, 10, &v);
386 if (err)
387 return err;
388
389 mutex_lock(&data->update_lock);
390 r = FAN_TO_REG(v, data->fan_div[n]);
391 data->fan_min[n] = r;
392
393 if (n == 0)
394 gl520_write_value(client, GL520_REG_FAN_MIN,
395 (gl520_read_value(client, GL520_REG_FAN_MIN)
396 & ~0xff00) | (r << 8));
397 else
398 gl520_write_value(client, GL520_REG_FAN_MIN,
399 (gl520_read_value(client, GL520_REG_FAN_MIN)
400 & ~0xff) | r);
401
402 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
403 if (data->fan_min[n] == 0)
404 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
405 else
406 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
407 data->beep_mask &= data->alarm_mask;
408 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
409
410 mutex_unlock(&data->update_lock);
411 return count;
412}
413
414static ssize_t fan_div_store(struct device *dev,
415 struct device_attribute *attr, const char *buf,
416 size_t count)
417{
418 struct gl520_data *data = dev_get_drvdata(dev);
419 struct i2c_client *client = data->client;
420 int n = to_sensor_dev_attr(attr)->index;
421 u8 r;
422 unsigned long v;
423 int err;
424
425 err = kstrtoul(buf, 10, &v);
426 if (err)
427 return err;
428
429 switch (v) {
430 case 1:
431 r = 0;
432 break;
433 case 2:
434 r = 1;
435 break;
436 case 4:
437 r = 2;
438 break;
439 case 8:
440 r = 3;
441 break;
442 default:
443 dev_err(&client->dev,
444 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
445 return -EINVAL;
446 }
447
448 mutex_lock(&data->update_lock);
449 data->fan_div[n] = r;
450
451 if (n == 0)
452 gl520_write_value(client, GL520_REG_FAN_DIV,
453 (gl520_read_value(client, GL520_REG_FAN_DIV)
454 & ~0xc0) | (r << 6));
455 else
456 gl520_write_value(client, GL520_REG_FAN_DIV,
457 (gl520_read_value(client, GL520_REG_FAN_DIV)
458 & ~0x30) | (r << 4));
459
460 mutex_unlock(&data->update_lock);
461 return count;
462}
463
464static ssize_t fan1_off_store(struct device *dev,
465 struct device_attribute *attr, const char *buf,
466 size_t count)
467{
468 struct gl520_data *data = dev_get_drvdata(dev);
469 struct i2c_client *client = data->client;
470 u8 r;
471 unsigned long v;
472 int err;
473
474 err = kstrtoul(buf, 10, &v);
475 if (err)
476 return err;
477
478 r = (v ? 1 : 0);
479
480 mutex_lock(&data->update_lock);
481 data->fan_off = r;
482 gl520_write_value(client, GL520_REG_FAN_OFF,
483 (gl520_read_value(client, GL520_REG_FAN_OFF)
484 & ~0x0c) | (r << 2));
485 mutex_unlock(&data->update_lock);
486 return count;
487}
488
489static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
490static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
491static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
492static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
493static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
494static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
495static DEVICE_ATTR_RW(fan1_off);
496
497#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
498#define TEMP_CLAMP(val) clamp_val(val, -130000, 125000)
499#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130)
500
501static ssize_t temp_input_show(struct device *dev,
502 struct device_attribute *attr, char *buf)
503{
504 int n = to_sensor_dev_attr(attr)->index;
505 struct gl520_data *data = gl520_update_device(dev);
506
507 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
508}
509
510static ssize_t temp_max_show(struct device *dev,
511 struct device_attribute *attr, char *buf)
512{
513 int n = to_sensor_dev_attr(attr)->index;
514 struct gl520_data *data = gl520_update_device(dev);
515
516 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
517}
518
519static ssize_t temp_max_hyst_show(struct device *dev,
520 struct device_attribute *attr, char *buf)
521{
522 int n = to_sensor_dev_attr(attr)->index;
523 struct gl520_data *data = gl520_update_device(dev);
524
525 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
526}
527
528static ssize_t temp_max_store(struct device *dev,
529 struct device_attribute *attr, const char *buf,
530 size_t count)
531{
532 struct gl520_data *data = dev_get_drvdata(dev);
533 struct i2c_client *client = data->client;
534 int n = to_sensor_dev_attr(attr)->index;
535 long v;
536 int err;
537
538 err = kstrtol(buf, 10, &v);
539 if (err)
540 return err;
541
542 mutex_lock(&data->update_lock);
543 data->temp_max[n] = TEMP_TO_REG(v);
544 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
545 mutex_unlock(&data->update_lock);
546 return count;
547}
548
549static ssize_t temp_max_hyst_store(struct device *dev,
550 struct device_attribute *attr,
551 const char *buf, size_t count)
552{
553 struct gl520_data *data = dev_get_drvdata(dev);
554 struct i2c_client *client = data->client;
555 int n = to_sensor_dev_attr(attr)->index;
556 long v;
557 int err;
558
559 err = kstrtol(buf, 10, &v);
560 if (err)
561 return err;
562
563 mutex_lock(&data->update_lock);
564 data->temp_max_hyst[n] = TEMP_TO_REG(v);
565 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
566 data->temp_max_hyst[n]);
567 mutex_unlock(&data->update_lock);
568 return count;
569}
570
571static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
572static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
573static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
574static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
575static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp_max_hyst, 0);
576static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_max_hyst, 1);
577
578static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
579 char *buf)
580{
581 struct gl520_data *data = gl520_update_device(dev);
582 return sprintf(buf, "%d\n", data->alarms);
583}
584
585static ssize_t beep_enable_show(struct device *dev,
586 struct device_attribute *attr, char *buf)
587{
588 struct gl520_data *data = gl520_update_device(dev);
589 return sprintf(buf, "%d\n", data->beep_enable);
590}
591
592static ssize_t beep_mask_show(struct device *dev,
593 struct device_attribute *attr, char *buf)
594{
595 struct gl520_data *data = gl520_update_device(dev);
596 return sprintf(buf, "%d\n", data->beep_mask);
597}
598
599static ssize_t beep_enable_store(struct device *dev,
600 struct device_attribute *attr,
601 const char *buf, size_t count)
602{
603 struct gl520_data *data = dev_get_drvdata(dev);
604 struct i2c_client *client = data->client;
605 u8 r;
606 unsigned long v;
607 int err;
608
609 err = kstrtoul(buf, 10, &v);
610 if (err)
611 return err;
612
613 r = (v ? 0 : 1);
614
615 mutex_lock(&data->update_lock);
616 data->beep_enable = !r;
617 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
618 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
619 & ~0x04) | (r << 2));
620 mutex_unlock(&data->update_lock);
621 return count;
622}
623
624static ssize_t beep_mask_store(struct device *dev,
625 struct device_attribute *attr, const char *buf,
626 size_t count)
627{
628 struct gl520_data *data = dev_get_drvdata(dev);
629 struct i2c_client *client = data->client;
630 unsigned long r;
631 int err;
632
633 err = kstrtoul(buf, 10, &r);
634 if (err)
635 return err;
636
637 mutex_lock(&data->update_lock);
638 r &= data->alarm_mask;
639 data->beep_mask = r;
640 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
641 mutex_unlock(&data->update_lock);
642 return count;
643}
644
645static DEVICE_ATTR_RO(alarms);
646static DEVICE_ATTR_RW(beep_enable);
647static DEVICE_ATTR_RW(beep_mask);
648
649static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
650 char *buf)
651{
652 int bit_nr = to_sensor_dev_attr(attr)->index;
653 struct gl520_data *data = gl520_update_device(dev);
654
655 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
656}
657
658static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
659static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
660static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
661static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
662static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
663static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5);
664static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6);
665static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 7);
666static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 7);
667
668static ssize_t beep_show(struct device *dev, struct device_attribute *attr,
669 char *buf)
670{
671 int bitnr = to_sensor_dev_attr(attr)->index;
672 struct gl520_data *data = gl520_update_device(dev);
673
674 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
675}
676
677static ssize_t beep_store(struct device *dev, struct device_attribute *attr,
678 const char *buf, size_t count)
679{
680 struct gl520_data *data = dev_get_drvdata(dev);
681 struct i2c_client *client = data->client;
682 int bitnr = to_sensor_dev_attr(attr)->index;
683 unsigned long bit;
684
685 int err;
686
687 err = kstrtoul(buf, 10, &bit);
688 if (err)
689 return err;
690 if (bit & ~1)
691 return -EINVAL;
692
693 mutex_lock(&data->update_lock);
694 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
695 if (bit)
696 data->beep_mask |= (1 << bitnr);
697 else
698 data->beep_mask &= ~(1 << bitnr);
699 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
700 mutex_unlock(&data->update_lock);
701 return count;
702}
703
704static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0);
705static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1);
706static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2);
707static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3);
708static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4);
709static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5);
710static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6);
711static SENSOR_DEVICE_ATTR_RW(temp2_beep, beep, 7);
712static SENSOR_DEVICE_ATTR_RW(in4_beep, beep, 7);
713
714static struct attribute *gl520_attributes[] = {
715 &dev_attr_cpu0_vid.attr,
716
717 &sensor_dev_attr_in0_input.dev_attr.attr,
718 &sensor_dev_attr_in0_min.dev_attr.attr,
719 &sensor_dev_attr_in0_max.dev_attr.attr,
720 &sensor_dev_attr_in0_alarm.dev_attr.attr,
721 &sensor_dev_attr_in0_beep.dev_attr.attr,
722 &sensor_dev_attr_in1_input.dev_attr.attr,
723 &sensor_dev_attr_in1_min.dev_attr.attr,
724 &sensor_dev_attr_in1_max.dev_attr.attr,
725 &sensor_dev_attr_in1_alarm.dev_attr.attr,
726 &sensor_dev_attr_in1_beep.dev_attr.attr,
727 &sensor_dev_attr_in2_input.dev_attr.attr,
728 &sensor_dev_attr_in2_min.dev_attr.attr,
729 &sensor_dev_attr_in2_max.dev_attr.attr,
730 &sensor_dev_attr_in2_alarm.dev_attr.attr,
731 &sensor_dev_attr_in2_beep.dev_attr.attr,
732 &sensor_dev_attr_in3_input.dev_attr.attr,
733 &sensor_dev_attr_in3_min.dev_attr.attr,
734 &sensor_dev_attr_in3_max.dev_attr.attr,
735 &sensor_dev_attr_in3_alarm.dev_attr.attr,
736 &sensor_dev_attr_in3_beep.dev_attr.attr,
737
738 &sensor_dev_attr_fan1_input.dev_attr.attr,
739 &sensor_dev_attr_fan1_min.dev_attr.attr,
740 &sensor_dev_attr_fan1_div.dev_attr.attr,
741 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
742 &sensor_dev_attr_fan1_beep.dev_attr.attr,
743 &dev_attr_fan1_off.attr,
744 &sensor_dev_attr_fan2_input.dev_attr.attr,
745 &sensor_dev_attr_fan2_min.dev_attr.attr,
746 &sensor_dev_attr_fan2_div.dev_attr.attr,
747 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
748 &sensor_dev_attr_fan2_beep.dev_attr.attr,
749
750 &sensor_dev_attr_temp1_input.dev_attr.attr,
751 &sensor_dev_attr_temp1_max.dev_attr.attr,
752 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
753 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
754 &sensor_dev_attr_temp1_beep.dev_attr.attr,
755
756 &dev_attr_alarms.attr,
757 &dev_attr_beep_enable.attr,
758 &dev_attr_beep_mask.attr,
759 NULL
760};
761
762static const struct attribute_group gl520_group = {
763 .attrs = gl520_attributes,
764};
765
766static struct attribute *gl520_attributes_in4[] = {
767 &sensor_dev_attr_in4_input.dev_attr.attr,
768 &sensor_dev_attr_in4_min.dev_attr.attr,
769 &sensor_dev_attr_in4_max.dev_attr.attr,
770 &sensor_dev_attr_in4_alarm.dev_attr.attr,
771 &sensor_dev_attr_in4_beep.dev_attr.attr,
772 NULL
773};
774
775static struct attribute *gl520_attributes_temp2[] = {
776 &sensor_dev_attr_temp2_input.dev_attr.attr,
777 &sensor_dev_attr_temp2_max.dev_attr.attr,
778 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
779 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
780 &sensor_dev_attr_temp2_beep.dev_attr.attr,
781 NULL
782};
783
784static const struct attribute_group gl520_group_in4 = {
785 .attrs = gl520_attributes_in4,
786};
787
788static const struct attribute_group gl520_group_temp2 = {
789 .attrs = gl520_attributes_temp2,
790};
791
792
793/*
794 * Real code
795 */
796
797/* Return 0 if detection is successful, -ENODEV otherwise */
798static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
799{
800 struct i2c_adapter *adapter = client->adapter;
801
802 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
803 I2C_FUNC_SMBUS_WORD_DATA))
804 return -ENODEV;
805
806 /* Determine the chip type. */
807 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
808 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
809 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
810 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
811 return -ENODEV;
812 }
813
814 strscpy(info->type, "gl520sm", I2C_NAME_SIZE);
815
816 return 0;
817}
818
819/* Called when we have found a new GL520SM. */
820static void gl520_init_client(struct i2c_client *client)
821{
822 struct gl520_data *data = i2c_get_clientdata(client);
823 u8 oldconf, conf;
824
825 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
826
827 data->alarm_mask = 0xff;
828 data->vrm = vid_which_vrm();
829
830 if (extra_sensor_type == 1)
831 conf &= ~0x10;
832 else if (extra_sensor_type == 2)
833 conf |= 0x10;
834 data->two_temps = !(conf & 0x10);
835
836 /* If IRQ# is disabled, we can safely force comparator mode */
837 if (!(conf & 0x20))
838 conf &= 0xf7;
839
840 /* Enable monitoring if needed */
841 conf |= 0x40;
842
843 if (conf != oldconf)
844 gl520_write_value(client, GL520_REG_CONF, conf);
845
846 gl520_update_device(&(client->dev));
847
848 if (data->fan_min[0] == 0)
849 data->alarm_mask &= ~0x20;
850 if (data->fan_min[1] == 0)
851 data->alarm_mask &= ~0x40;
852
853 data->beep_mask &= data->alarm_mask;
854 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
855}
856
857static int gl520_probe(struct i2c_client *client)
858{
859 struct device *dev = &client->dev;
860 struct device *hwmon_dev;
861 struct gl520_data *data;
862
863 data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL);
864 if (!data)
865 return -ENOMEM;
866
867 i2c_set_clientdata(client, data);
868 mutex_init(&data->update_lock);
869 data->client = client;
870
871 /* Initialize the GL520SM chip */
872 gl520_init_client(client);
873
874 /* sysfs hooks */
875 data->groups[0] = &gl520_group;
876
877 if (data->two_temps)
878 data->groups[1] = &gl520_group_temp2;
879 else
880 data->groups[1] = &gl520_group_in4;
881
882 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
883 data, data->groups);
884 return PTR_ERR_OR_ZERO(hwmon_dev);
885}
886
887static const struct i2c_device_id gl520_id[] = {
888 { "gl520sm", 0 },
889 { }
890};
891MODULE_DEVICE_TABLE(i2c, gl520_id);
892
893static struct i2c_driver gl520_driver = {
894 .class = I2C_CLASS_HWMON,
895 .driver = {
896 .name = "gl520sm",
897 },
898 .probe_new = gl520_probe,
899 .id_table = gl520_id,
900 .detect = gl520_detect,
901 .address_list = normal_i2c,
902};
903
904module_i2c_driver(gl520_driver);
905
906MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
907 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
908 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
909MODULE_DESCRIPTION("GL520SM driver");
910MODULE_LICENSE("GPL");