1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * w83791d.c - Part of lm_sensors, Linux kernel modules for hardware
6 * Copyright (C) 2006-2007 Charles Spirakis <bezaur@gmail.com>
10 * Supports following chips:
12 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
13 * w83791d 10 5 5 3 0x71 0x5ca3 yes no
15 * The w83791d chip appears to be part way between the 83781d and the
16 * 83792d. Thus, this file is derived from both the w83792d.c and
19 * The w83791g chip is the same as the w83791d but lead-free.
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/i2c.h>
26 #include <linux/hwmon.h>
27 #include <linux/hwmon-vid.h>
28 #include <linux/hwmon-sysfs.h>
29 #include <linux/err.h>
30 #include <linux/mutex.h>
31 #include <linux/jiffies.h>
33 #define NUMBER_OF_VIN 10
34 #define NUMBER_OF_FANIN 5
35 #define NUMBER_OF_TEMPIN 3
36 #define NUMBER_OF_PWM 5
38 /* Addresses to scan */
39 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
42 /* Insmod parameters */
44 static unsigned short force_subclients[4];
45 module_param_array(force_subclients, short, NULL, 0);
46 MODULE_PARM_DESC(force_subclients,
47 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
50 module_param(reset, bool, 0);
51 MODULE_PARM_DESC(reset, "Set to one to force a hardware chip reset");
54 module_param(init, bool, 0);
55 MODULE_PARM_DESC(init, "Set to one to force extra software initialization");
57 /* The W83791D registers */
58 static const u8 W83791D_REG_IN[NUMBER_OF_VIN] = {
59 0x20, /* VCOREA in DataSheet */
60 0x21, /* VINR0 in DataSheet */
61 0x22, /* +3.3VIN in DataSheet */
62 0x23, /* VDD5V in DataSheet */
63 0x24, /* +12VIN in DataSheet */
64 0x25, /* -12VIN in DataSheet */
65 0x26, /* -5VIN in DataSheet */
66 0xB0, /* 5VSB in DataSheet */
67 0xB1, /* VBAT in DataSheet */
68 0xB2 /* VINR1 in DataSheet */
71 static const u8 W83791D_REG_IN_MAX[NUMBER_OF_VIN] = {
72 0x2B, /* VCOREA High Limit in DataSheet */
73 0x2D, /* VINR0 High Limit in DataSheet */
74 0x2F, /* +3.3VIN High Limit in DataSheet */
75 0x31, /* VDD5V High Limit in DataSheet */
76 0x33, /* +12VIN High Limit in DataSheet */
77 0x35, /* -12VIN High Limit in DataSheet */
78 0x37, /* -5VIN High Limit in DataSheet */
79 0xB4, /* 5VSB High Limit in DataSheet */
80 0xB6, /* VBAT High Limit in DataSheet */
81 0xB8 /* VINR1 High Limit in DataSheet */
83 static const u8 W83791D_REG_IN_MIN[NUMBER_OF_VIN] = {
84 0x2C, /* VCOREA Low Limit in DataSheet */
85 0x2E, /* VINR0 Low Limit in DataSheet */
86 0x30, /* +3.3VIN Low Limit in DataSheet */
87 0x32, /* VDD5V Low Limit in DataSheet */
88 0x34, /* +12VIN Low Limit in DataSheet */
89 0x36, /* -12VIN Low Limit in DataSheet */
90 0x38, /* -5VIN Low Limit in DataSheet */
91 0xB5, /* 5VSB Low Limit in DataSheet */
92 0xB7, /* VBAT Low Limit in DataSheet */
93 0xB9 /* VINR1 Low Limit in DataSheet */
95 static const u8 W83791D_REG_FAN[NUMBER_OF_FANIN] = {
96 0x28, /* FAN 1 Count in DataSheet */
97 0x29, /* FAN 2 Count in DataSheet */
98 0x2A, /* FAN 3 Count in DataSheet */
99 0xBA, /* FAN 4 Count in DataSheet */
100 0xBB, /* FAN 5 Count in DataSheet */
102 static const u8 W83791D_REG_FAN_MIN[NUMBER_OF_FANIN] = {
103 0x3B, /* FAN 1 Count Low Limit in DataSheet */
104 0x3C, /* FAN 2 Count Low Limit in DataSheet */
105 0x3D, /* FAN 3 Count Low Limit in DataSheet */
106 0xBC, /* FAN 4 Count Low Limit in DataSheet */
107 0xBD, /* FAN 5 Count Low Limit in DataSheet */
110 static const u8 W83791D_REG_PWM[NUMBER_OF_PWM] = {
111 0x81, /* PWM 1 duty cycle register in DataSheet */
112 0x83, /* PWM 2 duty cycle register in DataSheet */
113 0x94, /* PWM 3 duty cycle register in DataSheet */
114 0xA0, /* PWM 4 duty cycle register in DataSheet */
115 0xA1, /* PWM 5 duty cycle register in DataSheet */
118 static const u8 W83791D_REG_TEMP_TARGET[3] = {
119 0x85, /* PWM 1 target temperature for temp 1 */
120 0x86, /* PWM 2 target temperature for temp 2 */
121 0x96, /* PWM 3 target temperature for temp 3 */
124 static const u8 W83791D_REG_TEMP_TOL[2] = {
125 0x87, /* PWM 1/2 temperature tolerance */
126 0x97, /* PWM 3 temperature tolerance */
129 static const u8 W83791D_REG_FAN_CFG[2] = {
130 0x84, /* FAN 1/2 configuration */
131 0x95, /* FAN 3 configuration */
134 static const u8 W83791D_REG_FAN_DIV[3] = {
135 0x47, /* contains FAN1 and FAN2 Divisor */
136 0x4b, /* contains FAN3 Divisor */
137 0x5C, /* contains FAN4 and FAN5 Divisor */
140 #define W83791D_REG_BANK 0x4E
141 #define W83791D_REG_TEMP2_CONFIG 0xC2
142 #define W83791D_REG_TEMP3_CONFIG 0xCA
144 static const u8 W83791D_REG_TEMP1[3] = {
145 0x27, /* TEMP 1 in DataSheet */
146 0x39, /* TEMP 1 Over in DataSheet */
147 0x3A, /* TEMP 1 Hyst in DataSheet */
150 static const u8 W83791D_REG_TEMP_ADD[2][6] = {
151 {0xC0, /* TEMP 2 in DataSheet */
152 0xC1, /* TEMP 2(0.5 deg) in DataSheet */
153 0xC5, /* TEMP 2 Over High part in DataSheet */
154 0xC6, /* TEMP 2 Over Low part in DataSheet */
155 0xC3, /* TEMP 2 Thyst High part in DataSheet */
156 0xC4}, /* TEMP 2 Thyst Low part in DataSheet */
157 {0xC8, /* TEMP 3 in DataSheet */
158 0xC9, /* TEMP 3(0.5 deg) in DataSheet */
159 0xCD, /* TEMP 3 Over High part in DataSheet */
160 0xCE, /* TEMP 3 Over Low part in DataSheet */
161 0xCB, /* TEMP 3 Thyst High part in DataSheet */
162 0xCC} /* TEMP 3 Thyst Low part in DataSheet */
165 #define W83791D_REG_BEEP_CONFIG 0x4D
167 static const u8 W83791D_REG_BEEP_CTRL[3] = {
168 0x56, /* BEEP Control Register 1 */
169 0x57, /* BEEP Control Register 2 */
170 0xA3, /* BEEP Control Register 3 */
173 #define W83791D_REG_GPIO 0x15
174 #define W83791D_REG_CONFIG 0x40
175 #define W83791D_REG_VID_FANDIV 0x47
176 #define W83791D_REG_DID_VID4 0x49
177 #define W83791D_REG_WCHIPID 0x58
178 #define W83791D_REG_CHIPMAN 0x4F
179 #define W83791D_REG_PIN 0x4B
180 #define W83791D_REG_I2C_SUBADDR 0x4A
182 #define W83791D_REG_ALARM1 0xA9 /* realtime status register1 */
183 #define W83791D_REG_ALARM2 0xAA /* realtime status register2 */
184 #define W83791D_REG_ALARM3 0xAB /* realtime status register3 */
186 #define W83791D_REG_VBAT 0x5D
187 #define W83791D_REG_I2C_ADDR 0x48
190 * The SMBus locks itself. The Winbond W83791D has a bank select register
191 * (index 0x4e), but the driver only accesses registers in bank 0. Since
192 * we don't switch banks, we don't need any special code to handle
193 * locking access between bank switches
195 static inline int w83791d_read(struct i2c_client *client, u8 reg)
197 return i2c_smbus_read_byte_data(client, reg);
200 static inline int w83791d_write(struct i2c_client *client, u8 reg, u8 value)
202 return i2c_smbus_write_byte_data(client, reg, value);
206 * The analog voltage inputs have 16mV LSB. Since the sysfs output is
207 * in mV as would be measured on the chip input pin, need to just
208 * multiply/divide by 16 to translate from/to register values.
210 #define IN_TO_REG(val) (clamp_val((((val) + 8) / 16), 0, 255))
211 #define IN_FROM_REG(val) ((val) * 16)
213 static u8 fan_to_reg(long rpm, int div)
217 rpm = clamp_val(rpm, 1, 1000000);
218 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
221 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
222 ((val) == 255 ? 0 : \
223 1350000 / ((val) * (div))))
225 /* for temp1 which is 8-bit resolution, LSB = 1 degree Celsius */
226 #define TEMP1_FROM_REG(val) ((val) * 1000)
227 #define TEMP1_TO_REG(val) ((val) <= -128000 ? -128 : \
228 (val) >= 127000 ? 127 : \
229 (val) < 0 ? ((val) - 500) / 1000 : \
230 ((val) + 500) / 1000)
233 * for temp2 and temp3 which are 9-bit resolution, LSB = 0.5 degree Celsius
234 * Assumes the top 8 bits are the integral amount and the bottom 8 bits
235 * are the fractional amount. Since we only have 0.5 degree resolution,
236 * the bottom 7 bits will always be zero
238 #define TEMP23_FROM_REG(val) ((val) / 128 * 500)
239 #define TEMP23_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
242 /* for thermal cruise target temp, 7-bits, LSB = 1 degree Celsius */
243 #define TARGET_TEMP_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \
246 /* for thermal cruise temp tolerance, 4-bits, LSB = 1 degree Celsius */
247 #define TOL_TEMP_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 15000), \
250 #define BEEP_MASK_TO_REG(val) ((val) & 0xffffff)
251 #define BEEP_MASK_FROM_REG(val) ((val) & 0xffffff)
253 #define DIV_FROM_REG(val) (1 << (val))
255 static u8 div_to_reg(int nr, long val)
259 /* fan divisors max out at 128 */
260 val = clamp_val(val, 1, 128) >> 1;
261 for (i = 0; i < 7; i++) {
269 struct w83791d_data {
270 struct device *hwmon_dev;
271 struct mutex update_lock;
273 char valid; /* !=0 if following fields are valid */
274 unsigned long last_updated; /* In jiffies */
277 u8 in[NUMBER_OF_VIN]; /* Register value */
278 u8 in_max[NUMBER_OF_VIN]; /* Register value */
279 u8 in_min[NUMBER_OF_VIN]; /* Register value */
282 u8 fan[NUMBER_OF_FANIN]; /* Register value */
283 u8 fan_min[NUMBER_OF_FANIN]; /* Register value */
284 u8 fan_div[NUMBER_OF_FANIN]; /* Register encoding, shifted right */
286 /* Temperature sensors */
288 s8 temp1[3]; /* current, over, thyst */
289 s16 temp_add[2][3]; /* fixed point value. Top 8 bits are the
290 * integral part, bottom 8 bits are the
291 * fractional part. We only use the top
292 * 9 bits as the resolution is only
293 * to the 0.5 degree C...
294 * two sensors with three values
299 u8 pwm[5]; /* pwm duty cycle */
300 u8 pwm_enable[3]; /* pwm enable status for fan 1-3
301 * (fan 4-5 only support manual mode)
304 u8 temp_target[3]; /* pwm 1-3 target temperature */
305 u8 temp_tolerance[3]; /* pwm 1-3 temperature tolerance */
308 u32 alarms; /* realtime status register encoding,combined */
309 u8 beep_enable; /* Global beep enable */
310 u32 beep_mask; /* Mask off specific beeps */
311 u8 vid; /* Register encoding, combined */
312 u8 vrm; /* hwmon-vid */
315 static int w83791d_probe(struct i2c_client *client,
316 const struct i2c_device_id *id);
317 static int w83791d_detect(struct i2c_client *client,
318 struct i2c_board_info *info);
319 static int w83791d_remove(struct i2c_client *client);
321 static int w83791d_read(struct i2c_client *client, u8 reg);
322 static int w83791d_write(struct i2c_client *client, u8 reg, u8 value);
323 static struct w83791d_data *w83791d_update_device(struct device *dev);
326 static void w83791d_print_debug(struct w83791d_data *data, struct device *dev);
329 static void w83791d_init_client(struct i2c_client *client);
331 static const struct i2c_device_id w83791d_id[] = {
335 MODULE_DEVICE_TABLE(i2c, w83791d_id);
337 static struct i2c_driver w83791d_driver = {
338 .class = I2C_CLASS_HWMON,
342 .probe = w83791d_probe,
343 .remove = w83791d_remove,
344 .id_table = w83791d_id,
345 .detect = w83791d_detect,
346 .address_list = normal_i2c,
349 /* following are the sysfs callback functions */
350 #define show_in_reg(reg) \
351 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
354 struct sensor_device_attribute *sensor_attr = \
355 to_sensor_dev_attr(attr); \
356 struct w83791d_data *data = w83791d_update_device(dev); \
357 int nr = sensor_attr->index; \
358 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
365 #define store_in_reg(REG, reg) \
366 static ssize_t store_in_##reg(struct device *dev, \
367 struct device_attribute *attr, \
368 const char *buf, size_t count) \
370 struct sensor_device_attribute *sensor_attr = \
371 to_sensor_dev_attr(attr); \
372 struct i2c_client *client = to_i2c_client(dev); \
373 struct w83791d_data *data = i2c_get_clientdata(client); \
374 int nr = sensor_attr->index; \
376 int err = kstrtoul(buf, 10, &val); \
379 mutex_lock(&data->update_lock); \
380 data->in_##reg[nr] = IN_TO_REG(val); \
381 w83791d_write(client, W83791D_REG_IN_##REG[nr], data->in_##reg[nr]); \
382 mutex_unlock(&data->update_lock); \
386 store_in_reg(MIN, min);
387 store_in_reg(MAX, max);
389 static struct sensor_device_attribute sda_in_input[] = {
390 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0),
391 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1),
392 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2),
393 SENSOR_ATTR(in3_input, S_IRUGO, show_in, NULL, 3),
394 SENSOR_ATTR(in4_input, S_IRUGO, show_in, NULL, 4),
395 SENSOR_ATTR(in5_input, S_IRUGO, show_in, NULL, 5),
396 SENSOR_ATTR(in6_input, S_IRUGO, show_in, NULL, 6),
397 SENSOR_ATTR(in7_input, S_IRUGO, show_in, NULL, 7),
398 SENSOR_ATTR(in8_input, S_IRUGO, show_in, NULL, 8),
399 SENSOR_ATTR(in9_input, S_IRUGO, show_in, NULL, 9),
402 static struct sensor_device_attribute sda_in_min[] = {
403 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0),
404 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1),
405 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2),
406 SENSOR_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 3),
407 SENSOR_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 4),
408 SENSOR_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 5),
409 SENSOR_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 6),
410 SENSOR_ATTR(in7_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 7),
411 SENSOR_ATTR(in8_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 8),
412 SENSOR_ATTR(in9_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 9),
415 static struct sensor_device_attribute sda_in_max[] = {
416 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0),
417 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1),
418 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2),
419 SENSOR_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 3),
420 SENSOR_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 4),
421 SENSOR_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 5),
422 SENSOR_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 6),
423 SENSOR_ATTR(in7_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 7),
424 SENSOR_ATTR(in8_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 8),
425 SENSOR_ATTR(in9_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 9),
429 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
432 struct sensor_device_attribute *sensor_attr =
433 to_sensor_dev_attr(attr);
434 struct w83791d_data *data = w83791d_update_device(dev);
435 int bitnr = sensor_attr->index;
437 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
440 static ssize_t store_beep(struct device *dev, struct device_attribute *attr,
441 const char *buf, size_t count)
443 struct sensor_device_attribute *sensor_attr =
444 to_sensor_dev_attr(attr);
445 struct i2c_client *client = to_i2c_client(dev);
446 struct w83791d_data *data = i2c_get_clientdata(client);
447 int bitnr = sensor_attr->index;
448 int bytenr = bitnr / 8;
452 err = kstrtoul(buf, 10, &val);
458 mutex_lock(&data->update_lock);
460 data->beep_mask &= ~(0xff << (bytenr * 8));
461 data->beep_mask |= w83791d_read(client, W83791D_REG_BEEP_CTRL[bytenr])
464 data->beep_mask &= ~(1 << bitnr);
465 data->beep_mask |= val << bitnr;
467 w83791d_write(client, W83791D_REG_BEEP_CTRL[bytenr],
468 (data->beep_mask >> (bytenr * 8)) & 0xff);
470 mutex_unlock(&data->update_lock);
475 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
478 struct sensor_device_attribute *sensor_attr =
479 to_sensor_dev_attr(attr);
480 struct w83791d_data *data = w83791d_update_device(dev);
481 int bitnr = sensor_attr->index;
483 return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
487 * Note: The bitmask for the beep enable/disable is different than
488 * the bitmask for the alarm.
490 static struct sensor_device_attribute sda_in_beep[] = {
491 SENSOR_ATTR(in0_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 0),
492 SENSOR_ATTR(in1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 13),
493 SENSOR_ATTR(in2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 2),
494 SENSOR_ATTR(in3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 3),
495 SENSOR_ATTR(in4_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 8),
496 SENSOR_ATTR(in5_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 9),
497 SENSOR_ATTR(in6_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 10),
498 SENSOR_ATTR(in7_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 16),
499 SENSOR_ATTR(in8_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 17),
500 SENSOR_ATTR(in9_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 14),
503 static struct sensor_device_attribute sda_in_alarm[] = {
504 SENSOR_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0),
505 SENSOR_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1),
506 SENSOR_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2),
507 SENSOR_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3),
508 SENSOR_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8),
509 SENSOR_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9),
510 SENSOR_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10),
511 SENSOR_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 19),
512 SENSOR_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 20),
513 SENSOR_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 14),
516 #define show_fan_reg(reg) \
517 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
520 struct sensor_device_attribute *sensor_attr = \
521 to_sensor_dev_attr(attr); \
522 struct w83791d_data *data = w83791d_update_device(dev); \
523 int nr = sensor_attr->index; \
524 return sprintf(buf, "%d\n", \
525 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \
529 show_fan_reg(fan_min);
531 static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr,
532 const char *buf, size_t count)
534 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
535 struct i2c_client *client = to_i2c_client(dev);
536 struct w83791d_data *data = i2c_get_clientdata(client);
537 int nr = sensor_attr->index;
541 err = kstrtoul(buf, 10, &val);
545 mutex_lock(&data->update_lock);
546 data->fan_min[nr] = fan_to_reg(val, DIV_FROM_REG(data->fan_div[nr]));
547 w83791d_write(client, W83791D_REG_FAN_MIN[nr], data->fan_min[nr]);
548 mutex_unlock(&data->update_lock);
553 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
556 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
557 int nr = sensor_attr->index;
558 struct w83791d_data *data = w83791d_update_device(dev);
559 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
563 * Note: we save and restore the fan minimum here, because its value is
564 * determined in part by the fan divisor. This follows the principle of
565 * least surprise; the user doesn't expect the fan minimum to change just
566 * because the divisor changed.
568 static ssize_t store_fan_div(struct device *dev, struct device_attribute *attr,
569 const char *buf, size_t count)
571 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
572 struct i2c_client *client = to_i2c_client(dev);
573 struct w83791d_data *data = i2c_get_clientdata(client);
574 int nr = sensor_attr->index;
585 err = kstrtoul(buf, 10, &val);
590 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
592 mutex_lock(&data->update_lock);
593 data->fan_div[nr] = div_to_reg(nr, val);
623 dev_warn(dev, "store_fan_div: Unexpected nr seen: %d\n", nr);
629 fan_div_reg = w83791d_read(client, W83791D_REG_FAN_DIV[indx])
631 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask;
633 w83791d_write(client, W83791D_REG_FAN_DIV[indx],
634 fan_div_reg | tmp_fan_div);
636 /* Bit 2 of fans 0-2 is stored in the vbat register (bits 5-7) */
638 keep_mask = ~(1 << (nr + 5));
639 vbat_reg = w83791d_read(client, W83791D_REG_VBAT)
641 tmp_fan_div = (data->fan_div[nr] << (3 + nr)) & ~keep_mask;
642 w83791d_write(client, W83791D_REG_VBAT,
643 vbat_reg | tmp_fan_div);
646 /* Restore fan_min */
647 data->fan_min[nr] = fan_to_reg(min, DIV_FROM_REG(data->fan_div[nr]));
648 w83791d_write(client, W83791D_REG_FAN_MIN[nr], data->fan_min[nr]);
653 mutex_unlock(&data->update_lock);
658 static struct sensor_device_attribute sda_fan_input[] = {
659 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
660 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
661 SENSOR_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2),
662 SENSOR_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3),
663 SENSOR_ATTR(fan5_input, S_IRUGO, show_fan, NULL, 4),
666 static struct sensor_device_attribute sda_fan_min[] = {
667 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO,
668 show_fan_min, store_fan_min, 0),
669 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO,
670 show_fan_min, store_fan_min, 1),
671 SENSOR_ATTR(fan3_min, S_IWUSR | S_IRUGO,
672 show_fan_min, store_fan_min, 2),
673 SENSOR_ATTR(fan4_min, S_IWUSR | S_IRUGO,
674 show_fan_min, store_fan_min, 3),
675 SENSOR_ATTR(fan5_min, S_IWUSR | S_IRUGO,
676 show_fan_min, store_fan_min, 4),
679 static struct sensor_device_attribute sda_fan_div[] = {
680 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO,
681 show_fan_div, store_fan_div, 0),
682 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO,
683 show_fan_div, store_fan_div, 1),
684 SENSOR_ATTR(fan3_div, S_IWUSR | S_IRUGO,
685 show_fan_div, store_fan_div, 2),
686 SENSOR_ATTR(fan4_div, S_IWUSR | S_IRUGO,
687 show_fan_div, store_fan_div, 3),
688 SENSOR_ATTR(fan5_div, S_IWUSR | S_IRUGO,
689 show_fan_div, store_fan_div, 4),
692 static struct sensor_device_attribute sda_fan_beep[] = {
693 SENSOR_ATTR(fan1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 6),
694 SENSOR_ATTR(fan2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 7),
695 SENSOR_ATTR(fan3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 11),
696 SENSOR_ATTR(fan4_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 21),
697 SENSOR_ATTR(fan5_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 22),
700 static struct sensor_device_attribute sda_fan_alarm[] = {
701 SENSOR_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6),
702 SENSOR_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7),
703 SENSOR_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11),
704 SENSOR_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 21),
705 SENSOR_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 22),
708 /* read/write PWMs */
709 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
712 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
713 int nr = sensor_attr->index;
714 struct w83791d_data *data = w83791d_update_device(dev);
715 return sprintf(buf, "%u\n", data->pwm[nr]);
718 static ssize_t store_pwm(struct device *dev, struct device_attribute *attr,
719 const char *buf, size_t count)
721 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
722 struct i2c_client *client = to_i2c_client(dev);
723 struct w83791d_data *data = i2c_get_clientdata(client);
724 int nr = sensor_attr->index;
727 if (kstrtoul(buf, 10, &val))
730 mutex_lock(&data->update_lock);
731 data->pwm[nr] = clamp_val(val, 0, 255);
732 w83791d_write(client, W83791D_REG_PWM[nr], data->pwm[nr]);
733 mutex_unlock(&data->update_lock);
737 static struct sensor_device_attribute sda_pwm[] = {
738 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO,
739 show_pwm, store_pwm, 0),
740 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO,
741 show_pwm, store_pwm, 1),
742 SENSOR_ATTR(pwm3, S_IWUSR | S_IRUGO,
743 show_pwm, store_pwm, 2),
744 SENSOR_ATTR(pwm4, S_IWUSR | S_IRUGO,
745 show_pwm, store_pwm, 3),
746 SENSOR_ATTR(pwm5, S_IWUSR | S_IRUGO,
747 show_pwm, store_pwm, 4),
750 static ssize_t show_pwmenable(struct device *dev, struct device_attribute *attr,
753 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
754 int nr = sensor_attr->index;
755 struct w83791d_data *data = w83791d_update_device(dev);
756 return sprintf(buf, "%u\n", data->pwm_enable[nr] + 1);
759 static ssize_t store_pwmenable(struct device *dev,
760 struct device_attribute *attr, const char *buf, size_t count)
762 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
763 struct i2c_client *client = to_i2c_client(dev);
764 struct w83791d_data *data = i2c_get_clientdata(client);
765 int nr = sensor_attr->index;
772 int ret = kstrtoul(buf, 10, &val);
774 if (ret || val < 1 || val > 3)
777 mutex_lock(&data->update_lock);
778 data->pwm_enable[nr] = val - 1;
797 reg_cfg_tmp = w83791d_read(client, W83791D_REG_FAN_CFG[reg_idx]);
798 reg_cfg_tmp = (reg_cfg_tmp & keep_mask) |
799 data->pwm_enable[nr] << val_shift;
801 w83791d_write(client, W83791D_REG_FAN_CFG[reg_idx], reg_cfg_tmp);
802 mutex_unlock(&data->update_lock);
806 static struct sensor_device_attribute sda_pwmenable[] = {
807 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
808 show_pwmenable, store_pwmenable, 0),
809 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
810 show_pwmenable, store_pwmenable, 1),
811 SENSOR_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
812 show_pwmenable, store_pwmenable, 2),
815 /* For Smart Fan I / Thermal Cruise */
816 static ssize_t show_temp_target(struct device *dev,
817 struct device_attribute *attr, char *buf)
819 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
820 struct w83791d_data *data = w83791d_update_device(dev);
821 int nr = sensor_attr->index;
822 return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->temp_target[nr]));
825 static ssize_t store_temp_target(struct device *dev,
826 struct device_attribute *attr, const char *buf, size_t count)
828 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
829 struct i2c_client *client = to_i2c_client(dev);
830 struct w83791d_data *data = i2c_get_clientdata(client);
831 int nr = sensor_attr->index;
835 if (kstrtol(buf, 10, &val))
838 mutex_lock(&data->update_lock);
839 data->temp_target[nr] = TARGET_TEMP_TO_REG(val);
840 target_mask = w83791d_read(client,
841 W83791D_REG_TEMP_TARGET[nr]) & 0x80;
842 w83791d_write(client, W83791D_REG_TEMP_TARGET[nr],
843 data->temp_target[nr] | target_mask);
844 mutex_unlock(&data->update_lock);
848 static struct sensor_device_attribute sda_temp_target[] = {
849 SENSOR_ATTR(temp1_target, S_IWUSR | S_IRUGO,
850 show_temp_target, store_temp_target, 0),
851 SENSOR_ATTR(temp2_target, S_IWUSR | S_IRUGO,
852 show_temp_target, store_temp_target, 1),
853 SENSOR_ATTR(temp3_target, S_IWUSR | S_IRUGO,
854 show_temp_target, store_temp_target, 2),
857 static ssize_t show_temp_tolerance(struct device *dev,
858 struct device_attribute *attr, char *buf)
860 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
861 struct w83791d_data *data = w83791d_update_device(dev);
862 int nr = sensor_attr->index;
863 return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->temp_tolerance[nr]));
866 static ssize_t store_temp_tolerance(struct device *dev,
867 struct device_attribute *attr, const char *buf, size_t count)
869 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
870 struct i2c_client *client = to_i2c_client(dev);
871 struct w83791d_data *data = i2c_get_clientdata(client);
872 int nr = sensor_attr->index;
879 if (kstrtoul(buf, 10, &val))
900 mutex_lock(&data->update_lock);
901 data->temp_tolerance[nr] = TOL_TEMP_TO_REG(val);
902 target_mask = w83791d_read(client,
903 W83791D_REG_TEMP_TOL[reg_idx]) & keep_mask;
904 w83791d_write(client, W83791D_REG_TEMP_TOL[reg_idx],
905 (data->temp_tolerance[nr] << val_shift) | target_mask);
906 mutex_unlock(&data->update_lock);
910 static struct sensor_device_attribute sda_temp_tolerance[] = {
911 SENSOR_ATTR(temp1_tolerance, S_IWUSR | S_IRUGO,
912 show_temp_tolerance, store_temp_tolerance, 0),
913 SENSOR_ATTR(temp2_tolerance, S_IWUSR | S_IRUGO,
914 show_temp_tolerance, store_temp_tolerance, 1),
915 SENSOR_ATTR(temp3_tolerance, S_IWUSR | S_IRUGO,
916 show_temp_tolerance, store_temp_tolerance, 2),
919 /* read/write the temperature1, includes measured value and limits */
920 static ssize_t show_temp1(struct device *dev, struct device_attribute *devattr,
923 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
924 struct w83791d_data *data = w83791d_update_device(dev);
925 return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->temp1[attr->index]));
928 static ssize_t store_temp1(struct device *dev, struct device_attribute *devattr,
929 const char *buf, size_t count)
931 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
932 struct i2c_client *client = to_i2c_client(dev);
933 struct w83791d_data *data = i2c_get_clientdata(client);
934 int nr = attr->index;
938 err = kstrtol(buf, 10, &val);
942 mutex_lock(&data->update_lock);
943 data->temp1[nr] = TEMP1_TO_REG(val);
944 w83791d_write(client, W83791D_REG_TEMP1[nr], data->temp1[nr]);
945 mutex_unlock(&data->update_lock);
949 /* read/write temperature2-3, includes measured value and limits */
950 static ssize_t show_temp23(struct device *dev, struct device_attribute *devattr,
953 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
954 struct w83791d_data *data = w83791d_update_device(dev);
956 int index = attr->index;
957 return sprintf(buf, "%d\n", TEMP23_FROM_REG(data->temp_add[nr][index]));
960 static ssize_t store_temp23(struct device *dev,
961 struct device_attribute *devattr,
962 const char *buf, size_t count)
964 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
965 struct i2c_client *client = to_i2c_client(dev);
966 struct w83791d_data *data = i2c_get_clientdata(client);
970 int index = attr->index;
972 err = kstrtol(buf, 10, &val);
976 mutex_lock(&data->update_lock);
977 data->temp_add[nr][index] = TEMP23_TO_REG(val);
978 w83791d_write(client, W83791D_REG_TEMP_ADD[nr][index * 2],
979 data->temp_add[nr][index] >> 8);
980 w83791d_write(client, W83791D_REG_TEMP_ADD[nr][index * 2 + 1],
981 data->temp_add[nr][index] & 0x80);
982 mutex_unlock(&data->update_lock);
987 static struct sensor_device_attribute_2 sda_temp_input[] = {
988 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp1, NULL, 0, 0),
989 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp23, NULL, 0, 0),
990 SENSOR_ATTR_2(temp3_input, S_IRUGO, show_temp23, NULL, 1, 0),
993 static struct sensor_device_attribute_2 sda_temp_max[] = {
994 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
995 show_temp1, store_temp1, 0, 1),
996 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR,
997 show_temp23, store_temp23, 0, 1),
998 SENSOR_ATTR_2(temp3_max, S_IRUGO | S_IWUSR,
999 show_temp23, store_temp23, 1, 1),
1002 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
1003 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
1004 show_temp1, store_temp1, 0, 2),
1005 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
1006 show_temp23, store_temp23, 0, 2),
1007 SENSOR_ATTR_2(temp3_max_hyst, S_IRUGO | S_IWUSR,
1008 show_temp23, store_temp23, 1, 2),
1012 * Note: The bitmask for the beep enable/disable is different than
1013 * the bitmask for the alarm.
1015 static struct sensor_device_attribute sda_temp_beep[] = {
1016 SENSOR_ATTR(temp1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 4),
1017 SENSOR_ATTR(temp2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 5),
1018 SENSOR_ATTR(temp3_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 1),
1021 static struct sensor_device_attribute sda_temp_alarm[] = {
1022 SENSOR_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4),
1023 SENSOR_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5),
1024 SENSOR_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13),
1027 /* get realtime status of all sensors items: voltage, temp, fan */
1028 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
1031 struct w83791d_data *data = w83791d_update_device(dev);
1032 return sprintf(buf, "%u\n", data->alarms);
1035 static DEVICE_ATTR_RO(alarms);
1039 #define GLOBAL_BEEP_ENABLE_SHIFT 15
1040 #define GLOBAL_BEEP_ENABLE_MASK (1 << GLOBAL_BEEP_ENABLE_SHIFT)
1042 static ssize_t show_beep_enable(struct device *dev,
1043 struct device_attribute *attr, char *buf)
1045 struct w83791d_data *data = w83791d_update_device(dev);
1046 return sprintf(buf, "%d\n", data->beep_enable);
1049 static ssize_t show_beep_mask(struct device *dev,
1050 struct device_attribute *attr, char *buf)
1052 struct w83791d_data *data = w83791d_update_device(dev);
1053 return sprintf(buf, "%d\n", BEEP_MASK_FROM_REG(data->beep_mask));
1057 static ssize_t store_beep_mask(struct device *dev,
1058 struct device_attribute *attr,
1059 const char *buf, size_t count)
1061 struct i2c_client *client = to_i2c_client(dev);
1062 struct w83791d_data *data = i2c_get_clientdata(client);
1067 err = kstrtol(buf, 10, &val);
1071 mutex_lock(&data->update_lock);
1074 * The beep_enable state overrides any enabling request from
1077 data->beep_mask = BEEP_MASK_TO_REG(val) & ~GLOBAL_BEEP_ENABLE_MASK;
1078 data->beep_mask |= (data->beep_enable << GLOBAL_BEEP_ENABLE_SHIFT);
1080 val = data->beep_mask;
1082 for (i = 0; i < 3; i++) {
1083 w83791d_write(client, W83791D_REG_BEEP_CTRL[i], (val & 0xff));
1087 mutex_unlock(&data->update_lock);
1092 static ssize_t store_beep_enable(struct device *dev,
1093 struct device_attribute *attr,
1094 const char *buf, size_t count)
1096 struct i2c_client *client = to_i2c_client(dev);
1097 struct w83791d_data *data = i2c_get_clientdata(client);
1101 err = kstrtol(buf, 10, &val);
1105 mutex_lock(&data->update_lock);
1107 data->beep_enable = val ? 1 : 0;
1109 /* Keep the full mask value in sync with the current enable */
1110 data->beep_mask &= ~GLOBAL_BEEP_ENABLE_MASK;
1111 data->beep_mask |= (data->beep_enable << GLOBAL_BEEP_ENABLE_SHIFT);
1114 * The global control is in the second beep control register
1115 * so only need to update that register
1117 val = (data->beep_mask >> 8) & 0xff;
1119 w83791d_write(client, W83791D_REG_BEEP_CTRL[1], val);
1121 mutex_unlock(&data->update_lock);
1126 static struct sensor_device_attribute sda_beep_ctrl[] = {
1127 SENSOR_ATTR(beep_enable, S_IRUGO | S_IWUSR,
1128 show_beep_enable, store_beep_enable, 0),
1129 SENSOR_ATTR(beep_mask, S_IRUGO | S_IWUSR,
1130 show_beep_mask, store_beep_mask, 1)
1133 /* cpu voltage regulation information */
1134 static ssize_t cpu0_vid_show(struct device *dev,
1135 struct device_attribute *attr, char *buf)
1137 struct w83791d_data *data = w83791d_update_device(dev);
1138 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
1141 static DEVICE_ATTR_RO(cpu0_vid);
1143 static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,
1146 struct w83791d_data *data = dev_get_drvdata(dev);
1147 return sprintf(buf, "%d\n", data->vrm);
1150 static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
1151 const char *buf, size_t count)
1153 struct w83791d_data *data = dev_get_drvdata(dev);
1158 * No lock needed as vrm is internal to the driver
1159 * (not read from a chip register) and so is not
1160 * updated in w83791d_update_device()
1163 err = kstrtoul(buf, 10, &val);
1174 static DEVICE_ATTR_RW(vrm);
1176 #define IN_UNIT_ATTRS(X) \
1177 &sda_in_input[X].dev_attr.attr, \
1178 &sda_in_min[X].dev_attr.attr, \
1179 &sda_in_max[X].dev_attr.attr, \
1180 &sda_in_beep[X].dev_attr.attr, \
1181 &sda_in_alarm[X].dev_attr.attr
1183 #define FAN_UNIT_ATTRS(X) \
1184 &sda_fan_input[X].dev_attr.attr, \
1185 &sda_fan_min[X].dev_attr.attr, \
1186 &sda_fan_div[X].dev_attr.attr, \
1187 &sda_fan_beep[X].dev_attr.attr, \
1188 &sda_fan_alarm[X].dev_attr.attr
1190 #define TEMP_UNIT_ATTRS(X) \
1191 &sda_temp_input[X].dev_attr.attr, \
1192 &sda_temp_max[X].dev_attr.attr, \
1193 &sda_temp_max_hyst[X].dev_attr.attr, \
1194 &sda_temp_beep[X].dev_attr.attr, \
1195 &sda_temp_alarm[X].dev_attr.attr
1197 static struct attribute *w83791d_attributes[] = {
1214 &dev_attr_alarms.attr,
1215 &sda_beep_ctrl[0].dev_attr.attr,
1216 &sda_beep_ctrl[1].dev_attr.attr,
1217 &dev_attr_cpu0_vid.attr,
1219 &sda_pwm[0].dev_attr.attr,
1220 &sda_pwm[1].dev_attr.attr,
1221 &sda_pwm[2].dev_attr.attr,
1222 &sda_pwmenable[0].dev_attr.attr,
1223 &sda_pwmenable[1].dev_attr.attr,
1224 &sda_pwmenable[2].dev_attr.attr,
1225 &sda_temp_target[0].dev_attr.attr,
1226 &sda_temp_target[1].dev_attr.attr,
1227 &sda_temp_target[2].dev_attr.attr,
1228 &sda_temp_tolerance[0].dev_attr.attr,
1229 &sda_temp_tolerance[1].dev_attr.attr,
1230 &sda_temp_tolerance[2].dev_attr.attr,
1234 static const struct attribute_group w83791d_group = {
1235 .attrs = w83791d_attributes,
1239 * Separate group of attributes for fan/pwm 4-5. Their pins can also be
1240 * in use for GPIO in which case their sysfs-interface should not be made
1243 static struct attribute *w83791d_attributes_fanpwm45[] = {
1246 &sda_pwm[3].dev_attr.attr,
1247 &sda_pwm[4].dev_attr.attr,
1251 static const struct attribute_group w83791d_group_fanpwm45 = {
1252 .attrs = w83791d_attributes_fanpwm45,
1255 static int w83791d_detect_subclients(struct i2c_client *client)
1257 struct i2c_adapter *adapter = client->adapter;
1258 int address = client->addr;
1262 id = i2c_adapter_id(adapter);
1263 if (force_subclients[0] == id && force_subclients[1] == address) {
1264 for (i = 2; i <= 3; i++) {
1265 if (force_subclients[i] < 0x48 ||
1266 force_subclients[i] > 0x4f) {
1267 dev_err(&client->dev,
1268 "invalid subclient "
1269 "address %d; must be 0x48-0x4f\n",
1270 force_subclients[i]);
1274 w83791d_write(client, W83791D_REG_I2C_SUBADDR,
1275 (force_subclients[2] & 0x07) |
1276 ((force_subclients[3] & 0x07) << 4));
1279 val = w83791d_read(client, W83791D_REG_I2C_SUBADDR);
1281 if (!(val & 0x88) && (val & 0x7) == ((val >> 4) & 0x7)) {
1282 dev_err(&client->dev,
1283 "duplicate addresses 0x%x, use force_subclient\n", 0x48 + (val & 0x7));
1288 devm_i2c_new_dummy_device(&client->dev, adapter, 0x48 + (val & 0x7));
1291 devm_i2c_new_dummy_device(&client->dev, adapter, 0x48 + ((val >> 4) & 0x7));
1297 /* Return 0 if detection is successful, -ENODEV otherwise */
1298 static int w83791d_detect(struct i2c_client *client,
1299 struct i2c_board_info *info)
1301 struct i2c_adapter *adapter = client->adapter;
1303 unsigned short address = client->addr;
1305 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1308 if (w83791d_read(client, W83791D_REG_CONFIG) & 0x80)
1311 val1 = w83791d_read(client, W83791D_REG_BANK);
1312 val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
1313 /* Check for Winbond ID if in bank 0 */
1314 if (!(val1 & 0x07)) {
1315 if ((!(val1 & 0x80) && val2 != 0xa3) ||
1316 ((val1 & 0x80) && val2 != 0x5c)) {
1321 * If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
1324 if (w83791d_read(client, W83791D_REG_I2C_ADDR) != address)
1327 /* We want bank 0 and Vendor ID high byte */
1328 val1 = w83791d_read(client, W83791D_REG_BANK) & 0x78;
1329 w83791d_write(client, W83791D_REG_BANK, val1 | 0x80);
1331 /* Verify it is a Winbond w83791d */
1332 val1 = w83791d_read(client, W83791D_REG_WCHIPID);
1333 val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
1334 if (val1 != 0x71 || val2 != 0x5c)
1337 strlcpy(info->type, "w83791d", I2C_NAME_SIZE);
1342 static int w83791d_probe(struct i2c_client *client,
1343 const struct i2c_device_id *id)
1345 struct w83791d_data *data;
1346 struct device *dev = &client->dev;
1352 val1 = w83791d_read(client, W83791D_REG_DID_VID4);
1353 dev_dbg(dev, "Device ID version: %d.%d (0x%02x)\n",
1354 (val1 >> 5) & 0x07, (val1 >> 1) & 0x0f, val1);
1357 data = devm_kzalloc(&client->dev, sizeof(struct w83791d_data),
1362 i2c_set_clientdata(client, data);
1363 mutex_init(&data->update_lock);
1365 err = w83791d_detect_subclients(client);
1369 /* Initialize the chip */
1370 w83791d_init_client(client);
1373 * If the fan_div is changed, make sure there is a rational
1376 for (i = 0; i < NUMBER_OF_FANIN; i++)
1377 data->fan_min[i] = w83791d_read(client, W83791D_REG_FAN_MIN[i]);
1379 /* Register sysfs hooks */
1380 err = sysfs_create_group(&client->dev.kobj, &w83791d_group);
1384 /* Check if pins of fan/pwm 4-5 are in use as GPIO */
1385 has_fanpwm45 = w83791d_read(client, W83791D_REG_GPIO) & 0x10;
1387 err = sysfs_create_group(&client->dev.kobj,
1388 &w83791d_group_fanpwm45);
1393 /* Everything is ready, now register the working device */
1394 data->hwmon_dev = hwmon_device_register(dev);
1395 if (IS_ERR(data->hwmon_dev)) {
1396 err = PTR_ERR(data->hwmon_dev);
1404 sysfs_remove_group(&client->dev.kobj, &w83791d_group_fanpwm45);
1406 sysfs_remove_group(&client->dev.kobj, &w83791d_group);
1410 static int w83791d_remove(struct i2c_client *client)
1412 struct w83791d_data *data = i2c_get_clientdata(client);
1414 hwmon_device_unregister(data->hwmon_dev);
1415 sysfs_remove_group(&client->dev.kobj, &w83791d_group);
1420 static void w83791d_init_client(struct i2c_client *client)
1422 struct w83791d_data *data = i2c_get_clientdata(client);
1427 * The difference between reset and init is that reset
1428 * does a hard reset of the chip via index 0x40, bit 7,
1429 * but init simply forces certain registers to have "sane"
1430 * values. The hope is that the BIOS has done the right
1431 * thing (which is why the default is reset=0, init=0),
1432 * but if not, reset is the hard hammer and init
1433 * is the soft mallet both of which are trying to whack
1434 * things into place...
1435 * NOTE: The data sheet makes a distinction between
1436 * "power on defaults" and "reset by MR". As far as I can tell,
1437 * the hard reset puts everything into a power-on state so I'm
1438 * not sure what "reset by MR" means or how it can happen.
1440 if (reset || init) {
1441 /* keep some BIOS settings when we... */
1442 old_beep = w83791d_read(client, W83791D_REG_BEEP_CONFIG);
1445 /* ... reset the chip and ... */
1446 w83791d_write(client, W83791D_REG_CONFIG, 0x80);
1449 /* ... disable power-on abnormal beep */
1450 w83791d_write(client, W83791D_REG_BEEP_CONFIG, old_beep | 0x80);
1452 /* disable the global beep (not done by hard reset) */
1453 tmp = w83791d_read(client, W83791D_REG_BEEP_CTRL[1]);
1454 w83791d_write(client, W83791D_REG_BEEP_CTRL[1], tmp & 0xef);
1457 /* Make sure monitoring is turned on for add-ons */
1458 tmp = w83791d_read(client, W83791D_REG_TEMP2_CONFIG);
1460 w83791d_write(client, W83791D_REG_TEMP2_CONFIG,
1464 tmp = w83791d_read(client, W83791D_REG_TEMP3_CONFIG);
1466 w83791d_write(client, W83791D_REG_TEMP3_CONFIG,
1470 /* Start monitoring */
1471 tmp = w83791d_read(client, W83791D_REG_CONFIG) & 0xf7;
1472 w83791d_write(client, W83791D_REG_CONFIG, tmp | 0x01);
1476 data->vrm = vid_which_vrm();
1479 static struct w83791d_data *w83791d_update_device(struct device *dev)
1481 struct i2c_client *client = to_i2c_client(dev);
1482 struct w83791d_data *data = i2c_get_clientdata(client);
1484 u8 reg_array_tmp[3];
1487 mutex_lock(&data->update_lock);
1489 if (time_after(jiffies, data->last_updated + (HZ * 3))
1491 dev_dbg(dev, "Starting w83791d device update\n");
1493 /* Update the voltages measured value and limits */
1494 for (i = 0; i < NUMBER_OF_VIN; i++) {
1495 data->in[i] = w83791d_read(client,
1497 data->in_max[i] = w83791d_read(client,
1498 W83791D_REG_IN_MAX[i]);
1499 data->in_min[i] = w83791d_read(client,
1500 W83791D_REG_IN_MIN[i]);
1503 /* Update the fan counts and limits */
1504 for (i = 0; i < NUMBER_OF_FANIN; i++) {
1505 /* Update the Fan measured value and limits */
1506 data->fan[i] = w83791d_read(client,
1507 W83791D_REG_FAN[i]);
1508 data->fan_min[i] = w83791d_read(client,
1509 W83791D_REG_FAN_MIN[i]);
1512 /* Update the fan divisor */
1513 for (i = 0; i < 3; i++) {
1514 reg_array_tmp[i] = w83791d_read(client,
1515 W83791D_REG_FAN_DIV[i]);
1517 data->fan_div[0] = (reg_array_tmp[0] >> 4) & 0x03;
1518 data->fan_div[1] = (reg_array_tmp[0] >> 6) & 0x03;
1519 data->fan_div[2] = (reg_array_tmp[1] >> 6) & 0x03;
1520 data->fan_div[3] = reg_array_tmp[2] & 0x07;
1521 data->fan_div[4] = (reg_array_tmp[2] >> 4) & 0x07;
1524 * The fan divisor for fans 0-2 get bit 2 from
1525 * bits 5-7 respectively of vbat register
1527 vbat_reg = w83791d_read(client, W83791D_REG_VBAT);
1528 for (i = 0; i < 3; i++)
1529 data->fan_div[i] |= (vbat_reg >> (3 + i)) & 0x04;
1531 /* Update PWM duty cycle */
1532 for (i = 0; i < NUMBER_OF_PWM; i++) {
1533 data->pwm[i] = w83791d_read(client,
1534 W83791D_REG_PWM[i]);
1537 /* Update PWM enable status */
1538 for (i = 0; i < 2; i++) {
1539 reg_array_tmp[i] = w83791d_read(client,
1540 W83791D_REG_FAN_CFG[i]);
1542 data->pwm_enable[0] = (reg_array_tmp[0] >> 2) & 0x03;
1543 data->pwm_enable[1] = (reg_array_tmp[0] >> 4) & 0x03;
1544 data->pwm_enable[2] = (reg_array_tmp[1] >> 2) & 0x03;
1546 /* Update PWM target temperature */
1547 for (i = 0; i < 3; i++) {
1548 data->temp_target[i] = w83791d_read(client,
1549 W83791D_REG_TEMP_TARGET[i]) & 0x7f;
1552 /* Update PWM temperature tolerance */
1553 for (i = 0; i < 2; i++) {
1554 reg_array_tmp[i] = w83791d_read(client,
1555 W83791D_REG_TEMP_TOL[i]);
1557 data->temp_tolerance[0] = reg_array_tmp[0] & 0x0f;
1558 data->temp_tolerance[1] = (reg_array_tmp[0] >> 4) & 0x0f;
1559 data->temp_tolerance[2] = reg_array_tmp[1] & 0x0f;
1561 /* Update the first temperature sensor */
1562 for (i = 0; i < 3; i++) {
1563 data->temp1[i] = w83791d_read(client,
1564 W83791D_REG_TEMP1[i]);
1567 /* Update the rest of the temperature sensors */
1568 for (i = 0; i < 2; i++) {
1569 for (j = 0; j < 3; j++) {
1570 data->temp_add[i][j] =
1571 (w83791d_read(client,
1572 W83791D_REG_TEMP_ADD[i][j * 2]) << 8) |
1573 w83791d_read(client,
1574 W83791D_REG_TEMP_ADD[i][j * 2 + 1]);
1578 /* Update the realtime status */
1580 w83791d_read(client, W83791D_REG_ALARM1) +
1581 (w83791d_read(client, W83791D_REG_ALARM2) << 8) +
1582 (w83791d_read(client, W83791D_REG_ALARM3) << 16);
1584 /* Update the beep configuration information */
1586 w83791d_read(client, W83791D_REG_BEEP_CTRL[0]) +
1587 (w83791d_read(client, W83791D_REG_BEEP_CTRL[1]) << 8) +
1588 (w83791d_read(client, W83791D_REG_BEEP_CTRL[2]) << 16);
1590 /* Extract global beep enable flag */
1592 (data->beep_mask >> GLOBAL_BEEP_ENABLE_SHIFT) & 0x01;
1594 /* Update the cpu voltage information */
1595 i = w83791d_read(client, W83791D_REG_VID_FANDIV);
1596 data->vid = i & 0x0f;
1597 data->vid |= (w83791d_read(client, W83791D_REG_DID_VID4) & 0x01)
1600 data->last_updated = jiffies;
1604 mutex_unlock(&data->update_lock);
1607 w83791d_print_debug(data, dev);
1614 static void w83791d_print_debug(struct w83791d_data *data, struct device *dev)
1618 dev_dbg(dev, "======Start of w83791d debug values======\n");
1619 dev_dbg(dev, "%d set of Voltages: ===>\n", NUMBER_OF_VIN);
1620 for (i = 0; i < NUMBER_OF_VIN; i++) {
1621 dev_dbg(dev, "vin[%d] is: 0x%02x\n", i, data->in[i]);
1622 dev_dbg(dev, "vin[%d] min is: 0x%02x\n", i, data->in_min[i]);
1623 dev_dbg(dev, "vin[%d] max is: 0x%02x\n", i, data->in_max[i]);
1625 dev_dbg(dev, "%d set of Fan Counts/Divisors: ===>\n", NUMBER_OF_FANIN);
1626 for (i = 0; i < NUMBER_OF_FANIN; i++) {
1627 dev_dbg(dev, "fan[%d] is: 0x%02x\n", i, data->fan[i]);
1628 dev_dbg(dev, "fan[%d] min is: 0x%02x\n", i, data->fan_min[i]);
1629 dev_dbg(dev, "fan_div[%d] is: 0x%02x\n", i, data->fan_div[i]);
1633 * temperature math is signed, but only print out the
1636 dev_dbg(dev, "%d set of Temperatures: ===>\n", NUMBER_OF_TEMPIN);
1637 for (i = 0; i < 3; i++)
1638 dev_dbg(dev, "temp1[%d] is: 0x%02x\n", i, (u8) data->temp1[i]);
1639 for (i = 0; i < 2; i++) {
1640 for (j = 0; j < 3; j++) {
1641 dev_dbg(dev, "temp_add[%d][%d] is: 0x%04x\n", i, j,
1642 (u16) data->temp_add[i][j]);
1646 dev_dbg(dev, "Misc Information: ===>\n");
1647 dev_dbg(dev, "alarm is: 0x%08x\n", data->alarms);
1648 dev_dbg(dev, "beep_mask is: 0x%08x\n", data->beep_mask);
1649 dev_dbg(dev, "beep_enable is: %d\n", data->beep_enable);
1650 dev_dbg(dev, "vid is: 0x%02x\n", data->vid);
1651 dev_dbg(dev, "vrm is: 0x%02x\n", data->vrm);
1652 dev_dbg(dev, "=======End of w83791d debug values========\n");
1657 module_i2c_driver(w83791d_driver);
1659 MODULE_AUTHOR("Charles Spirakis <bezaur@gmail.com>");
1660 MODULE_DESCRIPTION("W83791D driver");
1661 MODULE_LICENSE("GPL");