projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6-block.git] / drivers / hwmon / w83l786ng.c
CommitLineData
85f03bcc
KL		 1/*
2 w83l786ng.c - Linux kernel driver for hardware monitoring
3 Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation - version 2.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 02110-1301 USA.
18*/
19
20/*
21 Supports following chips:
22
23 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
24 w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no
25*/
26
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/slab.h>
30#include <linux/i2c.h>
31#include <linux/hwmon.h>
32#include <linux/hwmon-vid.h>
33#include <linux/hwmon-sysfs.h>
34#include <linux/err.h>
35#include <linux/mutex.h>
36
37/* Addresses to scan */
25e9c86d 38static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END };
85f03bcc
KL		 39
40/* Insmod parameters */
41I2C_CLIENT_INSMOD_1(w83l786ng);
42
43static int reset;
44module_param(reset, bool, 0);
45MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
46
47#define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2)
48#define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2)
49#define W83L786NG_REG_IN(nr) ((nr) + 0x20)
50
51#define W83L786NG_REG_FAN(nr) ((nr) + 0x28)
52#define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B)
53
54#define W83L786NG_REG_CONFIG 0x40
55#define W83L786NG_REG_ALARM1 0x41
56#define W83L786NG_REG_ALARM2 0x42
57#define W83L786NG_REG_GPIO_EN 0x47
58#define W83L786NG_REG_MAN_ID2 0x4C
59#define W83L786NG_REG_MAN_ID1 0x4D
60#define W83L786NG_REG_CHIP_ID 0x4E
61
62#define W83L786NG_REG_DIODE 0x53
63#define W83L786NG_REG_FAN_DIV 0x54
64#define W83L786NG_REG_FAN_CFG 0x80
65
66#define W83L786NG_REG_TOLERANCE 0x8D
67
68static const u8 W83L786NG_REG_TEMP[2][3] = {
69 { 0x25, /* TEMP 0 in DataSheet */
70 0x35, /* TEMP 0 Over in DataSheet */
71 0x36 }, /* TEMP 0 Hyst in DataSheet */
72 { 0x26, /* TEMP 1 in DataSheet */
73 0x37, /* TEMP 1 Over in DataSheet */
74 0x38 } /* TEMP 1 Hyst in DataSheet */
75};
76
77static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7};
78static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4};
79
80/* FAN Duty Cycle, be used to control */
81static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87};
82
83
84static inline u8
85FAN_TO_REG(long rpm, int div)
86{
87 if (rpm == 0)
88 return 255;
89 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
90 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
91}
92
93#define FAN_FROM_REG(val,div) ((val) == 0 ? -1 : \
94 ((val) == 255 ? 0 : \
95 1350000 / ((val) * (div))))
96
97/* for temp */
98#define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \
99 : (val)) / 1000, 0, 0xff))
100#define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
101
102/* The analog voltage inputs have 8mV LSB. Since the sysfs output is
103 in mV as would be measured on the chip input pin, need to just
104 multiply/divide by 8 to translate from/to register values. */
105#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255))
106#define IN_FROM_REG(val) ((val) * 8)
107
108#define DIV_FROM_REG(val) (1 << (val))
109
110static inline u8
111DIV_TO_REG(long val)
112{
113 int i;
114 val = SENSORS_LIMIT(val, 1, 128) >> 1;
115 for (i = 0; i < 7; i++) {
116 if (val == 0)
117 break;
118 val >>= 1;
119 }
120 return ((u8) i);
121}
122
123struct w83l786ng_data {
85f03bcc
KL		 124 struct device *hwmon_dev;
125 struct mutex update_lock;
126 char valid; /* !=0 if following fields are valid */
127 unsigned long last_updated; /* In jiffies */
128 unsigned long last_nonvolatile; /* In jiffies, last time we update the
129 nonvolatile registers */
130
131 u8 in[3];
132 u8 in_max[3];
133 u8 in_min[3];
134 u8 fan[2];
135 u8 fan_div[2];
136 u8 fan_min[2];
137 u8 temp_type[2];
138 u8 temp[2][3];
139 u8 pwm[2];
140 u8 pwm_mode[2]; /* 0->DC variable voltage
141 1->PWM variable duty cycle */
142
143 u8 pwm_enable[2]; /* 1->manual
144 2->thermal cruise (also called SmartFan I) */
145 u8 tolerance[2];
146};
147
33468e76
JD		 148static int w83l786ng_probe(struct i2c_client *client,
149 const struct i2c_device_id *id);
150static int w83l786ng_detect(struct i2c_client *client, int kind,
151 struct i2c_board_info *info);
152static int w83l786ng_remove(struct i2c_client *client);
85f03bcc
KL		 153static void w83l786ng_init_client(struct i2c_client *client);
154static struct w83l786ng_data *w83l786ng_update_device(struct device *dev);
155
33468e76
JD		 156static const struct i2c_device_id w83l786ng_id[] = {
157 { "w83l786ng", w83l786ng },
158 { }
159};
160MODULE_DEVICE_TABLE(i2c, w83l786ng_id);
161
85f03bcc 162static struct i2c_driver w83l786ng_driver = {
33468e76 163 .class = I2C_CLASS_HWMON,
85f03bcc
KL		 164 .driver = {
165 .name = "w83l786ng",
166 },
33468e76
JD		 167 .probe = w83l786ng_probe,
168 .remove = w83l786ng_remove,
169 .id_table = w83l786ng_id,
170 .detect = w83l786ng_detect,
171 .address_data = &addr_data,
85f03bcc
KL		 172};
173
174static u8
175w83l786ng_read_value(struct i2c_client *client, u8 reg)
176{
177 return i2c_smbus_read_byte_data(client, reg);
178}
179
180static int
181w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value)
182{
183 return i2c_smbus_write_byte_data(client, reg, value);
184}
185
186/* following are the sysfs callback functions */
187#define show_in_reg(reg) \
188static ssize_t \
189show_##reg(struct device *dev, struct device_attribute *attr, \
190 char *buf) \
191{ \
192 int nr = to_sensor_dev_attr(attr)->index; \
193 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
194 return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \
195}
196
197show_in_reg(in)
198show_in_reg(in_min)
199show_in_reg(in_max)
200
201#define store_in_reg(REG, reg) \
202static ssize_t \
203store_in_##reg (struct device *dev, struct device_attribute *attr, \
204 const char *buf, size_t count) \
205{ \
206 int nr = to_sensor_dev_attr(attr)->index; \
207 struct i2c_client *client = to_i2c_client(dev); \
208 struct w83l786ng_data *data = i2c_get_clientdata(client); \
209 unsigned long val = simple_strtoul(buf, NULL, 10); \
210 mutex_lock(&data->update_lock); \
211 data->in_##reg[nr] = IN_TO_REG(val); \
212 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \
213 data->in_##reg[nr]); \
214 mutex_unlock(&data->update_lock); \
215 return count; \
216}
217
218store_in_reg(MIN, min)
219store_in_reg(MAX, max)
220
221static struct sensor_device_attribute sda_in_input[] = {
222 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
223 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
224 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
225};
226
227static struct sensor_device_attribute sda_in_min[] = {
228 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
229 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
230 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
231};
232
233static struct sensor_device_attribute sda_in_max[] = {
234 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
235 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
236 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
237};
238
239#define show_fan_reg(reg) \
240static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
241 char *buf) \
242{ \
243 int nr = to_sensor_dev_attr(attr)->index; \
244 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
245 return sprintf(buf,"%d\n", \
246 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \
247}
248
249show_fan_reg(fan);
250show_fan_reg(fan_min);
251
252static ssize_t
253store_fan_min(struct device *dev, struct device_attribute *attr,
254 const char *buf, size_t count)
255{
256 int nr = to_sensor_dev_attr(attr)->index;
257 struct i2c_client *client = to_i2c_client(dev);
258 struct w83l786ng_data *data = i2c_get_clientdata(client);
259 u32 val;
260
261 val = simple_strtoul(buf, NULL, 10);
262 mutex_lock(&data->update_lock);
263 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
264 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
265 data->fan_min[nr]);
266 mutex_unlock(&data->update_lock);
267
268 return count;
269}
270
271static ssize_t
272show_fan_div(struct device *dev, struct device_attribute *attr,
273 char *buf)
274{
275 int nr = to_sensor_dev_attr(attr)->index;
276 struct w83l786ng_data *data = w83l786ng_update_device(dev);
277 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
278}
279
280/* Note: we save and restore the fan minimum here, because its value is
281 determined in part by the fan divisor. This follows the principle of
282 least surprise; the user doesn't expect the fan minimum to change just
283 because the divisor changed. */
284static ssize_t
285store_fan_div(struct device *dev, struct device_attribute *attr,
286 const char *buf, size_t count)
287{
288 int nr = to_sensor_dev_attr(attr)->index;
289 struct i2c_client *client = to_i2c_client(dev);
290 struct w83l786ng_data *data = i2c_get_clientdata(client);
291
292 unsigned long min;
293 u8 tmp_fan_div;
294 u8 fan_div_reg;
295 u8 keep_mask = 0;
296 u8 new_shift = 0;
297
298 /* Save fan_min */
299 mutex_lock(&data->update_lock);
300 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
301
302 data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10));
303
304 switch (nr) {
305 case 0:
306 keep_mask = 0xf8;
307 new_shift = 0;
308 break;
309 case 1:
310 keep_mask = 0x8f;
311 new_shift = 4;
312 break;
313 }
314
315 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV)
316 & keep_mask;
317
318 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
319
320 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV,
321 fan_div_reg | tmp_fan_div);
322
323 /* Restore fan_min */
324 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
325 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr),
326 data->fan_min[nr]);
327 mutex_unlock(&data->update_lock);
328
329 return count;
330}
331
332static struct sensor_device_attribute sda_fan_input[] = {
333 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
334 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
335};
336
337static struct sensor_device_attribute sda_fan_min[] = {
338 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
339 store_fan_min, 0),
340 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
341 store_fan_min, 1),
342};
343
344static struct sensor_device_attribute sda_fan_div[] = {
345 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div,
346 store_fan_div, 0),
347 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div,
348 store_fan_div, 1),
349};
350
351
352/* read/write the temperature, includes measured value and limits */
353
354static ssize_t
355show_temp(struct device *dev, struct device_attribute *attr, char *buf)
356{
357 struct sensor_device_attribute_2 *sensor_attr =
358 to_sensor_dev_attr_2(attr);
359 int nr = sensor_attr->nr;
360 int index = sensor_attr->index;
361 struct w83l786ng_data *data = w83l786ng_update_device(dev);
362 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
363}
364
365static ssize_t
366store_temp(struct device *dev, struct device_attribute *attr,
367 const char *buf, size_t count)
368{
369 struct sensor_device_attribute_2 *sensor_attr =
370 to_sensor_dev_attr_2(attr);
371 int nr = sensor_attr->nr;
372 int index = sensor_attr->index;
373 struct i2c_client *client = to_i2c_client(dev);
374 struct w83l786ng_data *data = i2c_get_clientdata(client);
375 s32 val;
376
377 val = simple_strtol(buf, NULL, 10);
378 mutex_lock(&data->update_lock);
379 data->temp[nr][index] = TEMP_TO_REG(val);
380 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index],
381 data->temp[nr][index]);
382 mutex_unlock(&data->update_lock);
383
384 return count;
385}
386
387static struct sensor_device_attribute_2 sda_temp_input[] = {
388 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
389 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0),
390};
391
392static struct sensor_device_attribute_2 sda_temp_max[] = {
393 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
394 show_temp, store_temp, 0, 1),
395 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
396 show_temp, store_temp, 1, 1),
397};
398
399static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
400 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
401 show_temp, store_temp, 0, 2),
402 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
403 show_temp, store_temp, 1, 2),
404};
405
406#define show_pwm_reg(reg) \
407static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \
408 char *buf) \
409{ \
410 struct w83l786ng_data *data = w83l786ng_update_device(dev); \
411 int nr = to_sensor_dev_attr(attr)->index; \
412 return sprintf(buf, "%d\n", data->reg[nr]); \
413}
414
415show_pwm_reg(pwm_mode)
416show_pwm_reg(pwm_enable)
417show_pwm_reg(pwm)
418
419static ssize_t
420store_pwm_mode(struct device *dev, struct device_attribute *attr,
421 const char *buf, size_t count)
422{
423 int nr = to_sensor_dev_attr(attr)->index;
424 struct i2c_client *client = to_i2c_client(dev);
425 struct w83l786ng_data *data = i2c_get_clientdata(client);
426 u32 val = simple_strtoul(buf, NULL, 10);
427 u8 reg;
428
429 if (val > 1)
430 return -EINVAL;
431 mutex_lock(&data->update_lock);
432 data->pwm_mode[nr] = val;
433 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
434 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]);
435 if (!val)
436 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr];
437 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
438 mutex_unlock(&data->update_lock);
439 return count;
440}
441
442static ssize_t
443store_pwm(struct device *dev, struct device_attribute *attr,
444 const char *buf, size_t count)
445{
446 int nr = to_sensor_dev_attr(attr)->index;
447 struct i2c_client *client = to_i2c_client(dev);
448 struct w83l786ng_data *data = i2c_get_clientdata(client);
449 u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255);
450
451 mutex_lock(&data->update_lock);
452 data->pwm[nr] = val;
453 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val);
454 mutex_unlock(&data->update_lock);
455 return count;
456}
457
458static ssize_t
459store_pwm_enable(struct device *dev, struct device_attribute *attr,
460 const char *buf, size_t count)
461{
462 int nr = to_sensor_dev_attr(attr)->index;
463 struct i2c_client *client = to_i2c_client(dev);
464 struct w83l786ng_data *data = i2c_get_clientdata(client);
465 u32 val = simple_strtoul(buf, NULL, 10);
466
467 u8 reg;
468
469 if (!val || (val > 2)) /* only modes 1 and 2 are supported */
470 return -EINVAL;
471
472 mutex_lock(&data->update_lock);
473 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
474 data->pwm_enable[nr] = val;
475 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
476 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
477 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
478 mutex_unlock(&data->update_lock);
479 return count;
480}
481
482static struct sensor_device_attribute sda_pwm[] = {
483 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
484 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
485};
486
487static struct sensor_device_attribute sda_pwm_mode[] = {
488 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
489 store_pwm_mode, 0),
490 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode,
491 store_pwm_mode, 1),
492};
493
494static struct sensor_device_attribute sda_pwm_enable[] = {
495 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
496 store_pwm_enable, 0),
497 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
498 store_pwm_enable, 1),
499};
500
501/* For Smart Fan I/Thermal Cruise and Smart Fan II */
502static ssize_t
503show_tolerance(struct device *dev, struct device_attribute *attr, char *buf)
504{
505 int nr = to_sensor_dev_attr(attr)->index;
506 struct w83l786ng_data *data = w83l786ng_update_device(dev);
507 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]);
508}
509
510static ssize_t
511store_tolerance(struct device *dev, struct device_attribute *attr,
512 const char *buf, size_t count)
513{
514 int nr = to_sensor_dev_attr(attr)->index;
515 struct i2c_client *client = to_i2c_client(dev);
516 struct w83l786ng_data *data = i2c_get_clientdata(client);
517 u32 val;
518 u8 tol_tmp, tol_mask;
519
520 val = simple_strtoul(buf, NULL, 10);
521
522 mutex_lock(&data->update_lock);
523 tol_mask = w83l786ng_read_value(client,
524 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0);
525 tol_tmp = SENSORS_LIMIT(val, 0, 15);
526 tol_tmp &= 0x0f;
527 data->tolerance[nr] = tol_tmp;
528 if (nr == 1) {
529 tol_tmp <<= 4;
530 }
531
532 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE,
533 tol_mask | tol_tmp);
534 mutex_unlock(&data->update_lock);
535 return count;
536}
537
538static struct sensor_device_attribute sda_tolerance[] = {
539 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO,
540 show_tolerance, store_tolerance, 0),
541 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO,
542 show_tolerance, store_tolerance, 1),
543};
544
545
546#define IN_UNIT_ATTRS(X) \
547 &sda_in_input[X].dev_attr.attr, \
548 &sda_in_min[X].dev_attr.attr, \
549 &sda_in_max[X].dev_attr.attr
550
551#define FAN_UNIT_ATTRS(X) \
552 &sda_fan_input[X].dev_attr.attr, \
553 &sda_fan_min[X].dev_attr.attr, \
554 &sda_fan_div[X].dev_attr.attr
555
556#define TEMP_UNIT_ATTRS(X) \
557 &sda_temp_input[X].dev_attr.attr, \
558 &sda_temp_max[X].dev_attr.attr, \
559 &sda_temp_max_hyst[X].dev_attr.attr
560
561#define PWM_UNIT_ATTRS(X) \
562 &sda_pwm[X].dev_attr.attr, \
563 &sda_pwm_mode[X].dev_attr.attr, \
564 &sda_pwm_enable[X].dev_attr.attr
565
566#define TOLERANCE_UNIT_ATTRS(X) \
567 &sda_tolerance[X].dev_attr.attr
568
569static struct attribute *w83l786ng_attributes[] = {
570 IN_UNIT_ATTRS(0),
571 IN_UNIT_ATTRS(1),
572 IN_UNIT_ATTRS(2),
573 FAN_UNIT_ATTRS(0),
574 FAN_UNIT_ATTRS(1),
575 TEMP_UNIT_ATTRS(0),
576 TEMP_UNIT_ATTRS(1),
577 PWM_UNIT_ATTRS(0),
578 PWM_UNIT_ATTRS(1),
579 TOLERANCE_UNIT_ATTRS(0),
580 TOLERANCE_UNIT_ATTRS(1),
581 NULL
582};
583
584static const struct attribute_group w83l786ng_group = {
585 .attrs = w83l786ng_attributes,
586};
587
588static int
33468e76
JD		 589w83l786ng_detect(struct i2c_client *client, int kind,
590 struct i2c_board_info *info)
85f03bcc 591{
33468e76 592 struct i2c_adapter *adapter = client->adapter;
85f03bcc
KL		 593
594 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
33468e76 595 return -ENODEV;
85f03bcc
KL		 596 }
597
85f03bcc
KL		 598 /*
599 * Now we do the remaining detection. A negative kind means that
600 * the driver was loaded with no force parameter (default), so we
601 * must both detect and identify the chip (actually there is only
602 * one possible kind of chip for now, W83L786NG). A zero kind means
603 * that the driver was loaded with the force parameter, the detection
604 * step shall be skipped. A positive kind means that the driver
605 * was loaded with the force parameter and a given kind of chip is
606 * requested, so both the detection and the identification steps
607 * are skipped.
608 */
609 if (kind < 0) { /* detection */
610 if (((w83l786ng_read_value(client,
611 W83L786NG_REG_CONFIG) & 0x80) != 0x00)) {
612 dev_dbg(&adapter->dev,
613 "W83L786NG detection failed at 0x%02x.\n",
33468e76
JD		 614 client->addr);
615 return -ENODEV;
85f03bcc
KL		 616 }
617 }
618
619 if (kind <= 0) { /* identification */
620 u16 man_id;
621 u8 chip_id;
622
623 man_id = (w83l786ng_read_value(client,
624 W83L786NG_REG_MAN_ID1) << 8) +
625 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2);
626 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID);
627
628 if (man_id == 0x5CA3) { /* Winbond */
629 if (chip_id == 0x80) { /* W83L786NG */
630 kind = w83l786ng;
631 }
632 }
633
634 if (kind <= 0) { /* identification failed */
635 dev_info(&adapter->dev,
636 "Unsupported chip (man_id=0x%04X, "
637 "chip_id=0x%02X).\n", man_id, chip_id);
33468e76 638 return -ENODEV;
85f03bcc
KL		 639 }
640 }
641
33468e76 642 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE);
85f03bcc 643
33468e76
JD		 644 return 0;
645}
646
647static int
648w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id)
649{
650 struct device *dev = &client->dev;
651 struct w83l786ng_data *data;
652 int i, err = 0;
653 u8 reg_tmp;
654
655 data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL);
656 if (!data) {
657 err = -ENOMEM;
658 goto exit;
659 }
660
661 i2c_set_clientdata(client, data);
662 mutex_init(&data->update_lock);
85f03bcc
KL		 663
664 /* Initialize the chip */
665 w83l786ng_init_client(client);
666
667 /* A few vars need to be filled upon startup */
668 for (i = 0; i < 2; i++) {
669 data->fan_min[i] = w83l786ng_read_value(client,
670 W83L786NG_REG_FAN_MIN(i));
671 }
672
673 /* Update the fan divisor */
674 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
675 data->fan_div[0] = reg_tmp & 0x07;
676 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
677
678 /* Register sysfs hooks */
679 if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group)))
680 goto exit_remove;
681
682 data->hwmon_dev = hwmon_device_register(dev);
683 if (IS_ERR(data->hwmon_dev)) {
684 err = PTR_ERR(data->hwmon_dev);
685 goto exit_remove;
686 }
687
688 return 0;
689
690 /* Unregister sysfs hooks */
691
692exit_remove:
693 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
85f03bcc
KL		 694 kfree(data);
695exit:
696 return err;
697}
698
699static int
33468e76 700w83l786ng_remove(struct i2c_client *client)
85f03bcc
KL		 701{
702 struct w83l786ng_data *data = i2c_get_clientdata(client);
85f03bcc
KL		 703
704 hwmon_device_unregister(data->hwmon_dev);
705 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group);
706
85f03bcc
KL		 707 kfree(data);
708
709 return 0;
710}
711
712static void
713w83l786ng_init_client(struct i2c_client *client)
714{
715 u8 tmp;
716
717 if (reset)
718 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80);
719
720 /* Start monitoring */
721 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG);
722 if (!(tmp & 0x01))
723 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01);
724}
725
726static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
727{
728 struct i2c_client *client = to_i2c_client(dev);
729 struct w83l786ng_data *data = i2c_get_clientdata(client);
730 int i, j;
731 u8 reg_tmp, pwmcfg;
732
733 mutex_lock(&data->update_lock);
734 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
735 || !data->valid) {
736 dev_dbg(&client->dev, "Updating w83l786ng data.\n");
737
738 /* Update the voltages measured value and limits */
739 for (i = 0; i < 3; i++) {
740 data->in[i] = w83l786ng_read_value(client,
741 W83L786NG_REG_IN(i));
742 data->in_min[i] = w83l786ng_read_value(client,
743 W83L786NG_REG_IN_MIN(i));
744 data->in_max[i] = w83l786ng_read_value(client,
745 W83L786NG_REG_IN_MAX(i));
746 }
747
748 /* Update the fan counts and limits */
749 for (i = 0; i < 2; i++) {
750 data->fan[i] = w83l786ng_read_value(client,
751 W83L786NG_REG_FAN(i));
752 data->fan_min[i] = w83l786ng_read_value(client,
753 W83L786NG_REG_FAN_MIN(i));
754 }
755
756 /* Update the fan divisor */
757 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV);
758 data->fan_div[0] = reg_tmp & 0x07;
759 data->fan_div[1] = (reg_tmp >> 4) & 0x07;
760
761 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
762 for (i = 0; i < 2; i++) {
763 data->pwm_mode[i] =
764 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
765 ? 0 : 1;
766 data->pwm_enable[i] =
767 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1;
768 data->pwm[i] = w83l786ng_read_value(client,
769 W83L786NG_REG_PWM[i]);
770 }
771
772
773 /* Update the temperature sensors */
774 for (i = 0; i < 2; i++) {
775 for (j = 0; j < 3; j++) {
776 data->temp[i][j] = w83l786ng_read_value(client,
777 W83L786NG_REG_TEMP[i][j]);
778 }
779 }
780
781 /* Update Smart Fan I/II tolerance */
782 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE);
783 data->tolerance[0] = reg_tmp & 0x0f;
784 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
785
786 data->last_updated = jiffies;
787 data->valid = 1;
788
789 }
790
791 mutex_unlock(&data->update_lock);
792
793 return data;
794}
795
796static int __init
797sensors_w83l786ng_init(void)
798{
799 return i2c_add_driver(&w83l786ng_driver);
800}
801
802static void __exit
803sensors_w83l786ng_exit(void)
804{
805 i2c_del_driver(&w83l786ng_driver);
806}
807
808MODULE_AUTHOR("Kevin Lo");
809MODULE_DESCRIPTION("w83l786ng driver");
810MODULE_LICENSE("GPL");
811
812module_init(sensors_w83l786ng_init);
813module_exit(sensors_w83l786ng_exit);
Linux 6.x block layer and io_uring tree(s)