1/*
2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
4 * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de>
5 * Based on the lm90 driver.
6 *
7 * The LM63 is a sensor chip made by National Semiconductor. It measures
8 * two temperatures (its own and one external one) and the speed of one
9 * fan, those speed it can additionally control. Complete datasheet can be
10 * obtained from National's website at:
11 * http://www.national.com/pf/LM/LM63.html
12 *
13 * The LM63 is basically an LM86 with fan speed monitoring and control
14 * capabilities added. It misses some of the LM86 features though:
15 * - No low limit for local temperature.
16 * - No critical limit for local temperature.
17 * - Critical limit for remote temperature can be changed only once. We
18 * will consider that the critical limit is read-only.
19 *
20 * The datasheet isn't very clear about what the tachometer reading is.
21 * I had a explanation from National Semiconductor though. The two lower
22 * bits of the read value have to be masked out. The value is still 16 bit
23 * in width.
24 *
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 */
39
40#include <linux/module.h>
41#include <linux/init.h>
42#include <linux/slab.h>
43#include <linux/jiffies.h>
44#include <linux/i2c.h>
45#include <linux/hwmon-sysfs.h>
46#include <linux/hwmon.h>
47#include <linux/err.h>
48#include <linux/mutex.h>
49#include <linux/of_device.h>
50#include <linux/sysfs.h>
51#include <linux/types.h>
52
53/*
54 * Addresses to scan
55 * Address is fully defined internally and cannot be changed except for
56 * LM64 which has one pin dedicated to address selection.
57 * LM63 and LM96163 have address 0x4c.
58 * LM64 can have address 0x18 or 0x4e.
59 */
60
61static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
62
63/*
64 * The LM63 registers
65 */
66
67#define LM63_REG_CONFIG1 0x03
68#define LM63_REG_CONVRATE 0x04
69#define LM63_REG_CONFIG2 0xBF
70#define LM63_REG_CONFIG_FAN 0x4A
71
72#define LM63_REG_TACH_COUNT_MSB 0x47
73#define LM63_REG_TACH_COUNT_LSB 0x46
74#define LM63_REG_TACH_LIMIT_MSB 0x49
75#define LM63_REG_TACH_LIMIT_LSB 0x48
76
77#define LM63_REG_PWM_VALUE 0x4C
78#define LM63_REG_PWM_FREQ 0x4D
79#define LM63_REG_LUT_TEMP_HYST 0x4F
80#define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr))
81#define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr))
82
83#define LM63_REG_LOCAL_TEMP 0x00
84#define LM63_REG_LOCAL_HIGH 0x05
85
86#define LM63_REG_REMOTE_TEMP_MSB 0x01
87#define LM63_REG_REMOTE_TEMP_LSB 0x10
88#define LM63_REG_REMOTE_OFFSET_MSB 0x11
89#define LM63_REG_REMOTE_OFFSET_LSB 0x12
90#define LM63_REG_REMOTE_HIGH_MSB 0x07
91#define LM63_REG_REMOTE_HIGH_LSB 0x13
92#define LM63_REG_REMOTE_LOW_MSB 0x08
93#define LM63_REG_REMOTE_LOW_LSB 0x14
94#define LM63_REG_REMOTE_TCRIT 0x19
95#define LM63_REG_REMOTE_TCRIT_HYST 0x21
96
97#define LM63_REG_ALERT_STATUS 0x02
98#define LM63_REG_ALERT_MASK 0x16
99
100#define LM63_REG_MAN_ID 0xFE
101#define LM63_REG_CHIP_ID 0xFF
102
103#define LM96163_REG_TRUTHERM 0x30
104#define LM96163_REG_REMOTE_TEMP_U_MSB 0x31
105#define LM96163_REG_REMOTE_TEMP_U_LSB 0x32
106#define LM96163_REG_CONFIG_ENHANCED 0x45
107
108#define LM63_MAX_CONVRATE 9
109
110#define LM63_MAX_CONVRATE_HZ 32
111#define LM96163_MAX_CONVRATE_HZ 26
112
113/*
114 * Conversions and various macros
115 * For tachometer counts, the LM63 uses 16-bit values.
116 * For local temperature and high limit, remote critical limit and hysteresis
117 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
118 * For remote temperature, low and high limits, it uses signed 11-bit values
119 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
120 * For LM64 the actual remote diode temperature is 16 degree Celsius higher
121 * than the register reading. Remote temperature setpoints have to be
122 * adapted accordingly.
123 */
124
125#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
126 5400000 / (reg))
127#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
128 (5400000 / (val)) & 0xFFFC)
129#define TEMP8_FROM_REG(reg) ((reg) * 1000)
130#define TEMP8_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
131 127000), 1000)
132#define TEMP8U_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, \
133 255000), 1000)
134#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
135#define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
136 127875), 125) * 32)
137#define TEMP11U_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), 0, \
138 255875), 125) * 32)
139#define HYST_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \
140 1000)
141
142#define UPDATE_INTERVAL(max, rate) \
143 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
144
145enum chips { lm63, lm64, lm96163 };
146
147/*
148 * Client data (each client gets its own)
149 */
150
151struct lm63_data {
152 struct i2c_client *client;
153 struct mutex update_lock;
154 const struct attribute_group *groups[5];
155 char valid; /* zero until following fields are valid */
156 char lut_valid; /* zero until lut fields are valid */
157 unsigned long last_updated; /* in jiffies */
158 unsigned long lut_last_updated; /* in jiffies */
159 enum chips kind;
160 int temp2_offset;
161
162 int update_interval; /* in milliseconds */
163 int max_convrate_hz;
164 int lut_size; /* 8 or 12 */
165
166 /* registers values */
167 u8 config, config_fan;
168 u16 fan[2]; /* 0: input
169 1: low limit */
170 u8 pwm1_freq;
171 u8 pwm1[13]; /* 0: current output
172 1-12: lookup table */
173 s8 temp8[15]; /* 0: local input
174 1: local high limit
175 2: remote critical limit
176 3-14: lookup table */
177 s16 temp11[4]; /* 0: remote input
178 1: remote low limit
179 2: remote high limit
180 3: remote offset */
181 u16 temp11u; /* remote input (unsigned) */
182 u8 temp2_crit_hyst;
183 u8 lut_temp_hyst;
184 u8 alarms;
185 bool pwm_highres;
186 bool lut_temp_highres;
187 bool remote_unsigned; /* true if unsigned remote upper limits */
188 bool trutherm;
189};
190
191static inline int temp8_from_reg(struct lm63_data *data, int nr)
192{
193 if (data->remote_unsigned)
194 return TEMP8_FROM_REG((u8)data->temp8[nr]);
195 return TEMP8_FROM_REG(data->temp8[nr]);
196}
197
198static inline int lut_temp_from_reg(struct lm63_data *data, int nr)
199{
200 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000);
201}
202
203static inline int lut_temp_to_reg(struct lm63_data *data, long val)
204{
205 val -= data->temp2_offset;
206 if (data->lut_temp_highres)
207 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500);
208 else
209 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
210}
211
212/*
213 * Update the lookup table register cache.
214 * client->update_lock must be held when calling this function.
215 */
216static void lm63_update_lut(struct lm63_data *data)
217{
218 struct i2c_client *client = data->client;
219 int i;
220
221 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) ||
222 !data->lut_valid) {
223 for (i = 0; i < data->lut_size; i++) {
224 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client,
225 LM63_REG_LUT_PWM(i));
226 data->temp8[3 + i] = i2c_smbus_read_byte_data(client,
227 LM63_REG_LUT_TEMP(i));
228 }
229 data->lut_temp_hyst = i2c_smbus_read_byte_data(client,
230 LM63_REG_LUT_TEMP_HYST);
231
232 data->lut_last_updated = jiffies;
233 data->lut_valid = 1;
234 }
235}
236
237static struct lm63_data *lm63_update_device(struct device *dev)
238{
239 struct lm63_data *data = dev_get_drvdata(dev);
240 struct i2c_client *client = data->client;
241 unsigned long next_update;
242
243 mutex_lock(&data->update_lock);
244
245 next_update = data->last_updated +
246 msecs_to_jiffies(data->update_interval);
247 if (time_after(jiffies, next_update) || !data->valid) {
248 if (data->config & 0x04) { /* tachometer enabled */
249 /* order matters for fan1_input */
250 data->fan[0] = i2c_smbus_read_byte_data(client,
251 LM63_REG_TACH_COUNT_LSB) & 0xFC;
252 data->fan[0] |= i2c_smbus_read_byte_data(client,
253 LM63_REG_TACH_COUNT_MSB) << 8;
254 data->fan[1] = (i2c_smbus_read_byte_data(client,
255 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
256 | (i2c_smbus_read_byte_data(client,
257 LM63_REG_TACH_LIMIT_MSB) << 8);
258 }
259
260 data->pwm1_freq = i2c_smbus_read_byte_data(client,
261 LM63_REG_PWM_FREQ);
262 if (data->pwm1_freq == 0)
263 data->pwm1_freq = 1;
264 data->pwm1[0] = i2c_smbus_read_byte_data(client,
265 LM63_REG_PWM_VALUE);
266
267 data->temp8[0] = i2c_smbus_read_byte_data(client,
268 LM63_REG_LOCAL_TEMP);
269 data->temp8[1] = i2c_smbus_read_byte_data(client,
270 LM63_REG_LOCAL_HIGH);
271
272 /* order matters for temp2_input */
273 data->temp11[0] = i2c_smbus_read_byte_data(client,
274 LM63_REG_REMOTE_TEMP_MSB) << 8;
275 data->temp11[0] |= i2c_smbus_read_byte_data(client,
276 LM63_REG_REMOTE_TEMP_LSB);
277 data->temp11[1] = (i2c_smbus_read_byte_data(client,
278 LM63_REG_REMOTE_LOW_MSB) << 8)
279 | i2c_smbus_read_byte_data(client,
280 LM63_REG_REMOTE_LOW_LSB);
281 data->temp11[2] = (i2c_smbus_read_byte_data(client,
282 LM63_REG_REMOTE_HIGH_MSB) << 8)
283 | i2c_smbus_read_byte_data(client,
284 LM63_REG_REMOTE_HIGH_LSB);
285 data->temp11[3] = (i2c_smbus_read_byte_data(client,
286 LM63_REG_REMOTE_OFFSET_MSB) << 8)
287 | i2c_smbus_read_byte_data(client,
288 LM63_REG_REMOTE_OFFSET_LSB);
289
290 if (data->kind == lm96163)
291 data->temp11u = (i2c_smbus_read_byte_data(client,
292 LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
293 | i2c_smbus_read_byte_data(client,
294 LM96163_REG_REMOTE_TEMP_U_LSB);
295
296 data->temp8[2] = i2c_smbus_read_byte_data(client,
297 LM63_REG_REMOTE_TCRIT);
298 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
299 LM63_REG_REMOTE_TCRIT_HYST);
300
301 data->alarms = i2c_smbus_read_byte_data(client,
302 LM63_REG_ALERT_STATUS) & 0x7F;
303
304 data->last_updated = jiffies;
305 data->valid = 1;
306 }
307
308 lm63_update_lut(data);
309
310 mutex_unlock(&data->update_lock);
311
312 return data;
313}
314
315/*
316 * Trip points in the lookup table should be in ascending order for both
317 * temperatures and PWM output values.
318 */
319static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data)
320{
321 int i;
322
323 mutex_lock(&data->update_lock);
324 lm63_update_lut(data);
325
326 for (i = 1; i < data->lut_size; i++) {
327 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
328 || data->temp8[3 + i - 1] > data->temp8[3 + i]) {
329 dev_warn(dev,
330 "Lookup table doesn't look sane (check entries %d and %d)\n",
331 i, i + 1);
332 break;
333 }
334 }
335 mutex_unlock(&data->update_lock);
336
337 return i == data->lut_size ? 0 : 1;
338}
339
340/*
341 * Sysfs callback functions and files
342 */
343
344static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
345 char *buf)
346{
347 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
348 struct lm63_data *data = lm63_update_device(dev);
349 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
350}
351
352static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
353 const char *buf, size_t count)
354{
355 struct lm63_data *data = dev_get_drvdata(dev);
356 struct i2c_client *client = data->client;
357 unsigned long val;
358 int err;
359
360 err = kstrtoul(buf, 10, &val);
361 if (err)
362 return err;
363
364 mutex_lock(&data->update_lock);
365 data->fan[1] = FAN_TO_REG(val);
366 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
367 data->fan[1] & 0xFF);
368 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
369 data->fan[1] >> 8);
370 mutex_unlock(&data->update_lock);
371 return count;
372}
373
374static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
375 char *buf)
376{
377 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
378 struct lm63_data *data = lm63_update_device(dev);
379 int nr = attr->index;
380 int pwm;
381
382 if (data->pwm_highres)
383 pwm = data->pwm1[nr];
384 else
385 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
386 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
387 (2 * data->pwm1_freq);
388
389 return sprintf(buf, "%d\n", pwm);
390}
391
392static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
393 const char *buf, size_t count)
394{
395 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
396 struct lm63_data *data = dev_get_drvdata(dev);
397 struct i2c_client *client = data->client;
398 int nr = attr->index;
399 unsigned long val;
400 int err;
401 u8 reg;
402
403 if (!(data->config_fan & 0x20)) /* register is read-only */
404 return -EPERM;
405
406 err = kstrtoul(buf, 10, &val);
407 if (err)
408 return err;
409
410 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
411 val = clamp_val(val, 0, 255);
412
413 mutex_lock(&data->update_lock);
414 data->pwm1[nr] = data->pwm_highres ? val :
415 (val * data->pwm1_freq * 2 + 127) / 255;
416 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
417 mutex_unlock(&data->update_lock);
418 return count;
419}
420
421static ssize_t pwm1_enable_show(struct device *dev,
422 struct device_attribute *dummy, char *buf)
423{
424 struct lm63_data *data = lm63_update_device(dev);
425 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
426}
427
428static ssize_t pwm1_enable_store(struct device *dev,
429 struct device_attribute *dummy,
430 const char *buf, size_t count)
431{
432 struct lm63_data *data = dev_get_drvdata(dev);
433 struct i2c_client *client = data->client;
434 unsigned long val;
435 int err;
436
437 err = kstrtoul(buf, 10, &val);
438 if (err)
439 return err;
440 if (val < 1 || val > 2)
441 return -EINVAL;
442
443 /*
444 * Only let the user switch to automatic mode if the lookup table
445 * looks sane.
446 */
447 if (val == 2 && lm63_lut_looks_bad(dev, data))
448 return -EPERM;
449
450 mutex_lock(&data->update_lock);
451 data->config_fan = i2c_smbus_read_byte_data(client,
452 LM63_REG_CONFIG_FAN);
453 if (val == 1)
454 data->config_fan |= 0x20;
455 else
456 data->config_fan &= ~0x20;
457 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
458 data->config_fan);
459 mutex_unlock(&data->update_lock);
460 return count;
461}
462
463/*
464 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
465 * For remote sensor registers temp2_offset has to be considered,
466 * for local sensor it must not.
467 * So we need separate 8bit accessors for local and remote sensor.
468 */
469static ssize_t show_local_temp8(struct device *dev,
470 struct device_attribute *devattr,
471 char *buf)
472{
473 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
474 struct lm63_data *data = lm63_update_device(dev);
475 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
476}
477
478static ssize_t show_remote_temp8(struct device *dev,
479 struct device_attribute *devattr,
480 char *buf)
481{
482 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
483 struct lm63_data *data = lm63_update_device(dev);
484 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
485 + data->temp2_offset);
486}
487
488static ssize_t show_lut_temp(struct device *dev,
489 struct device_attribute *devattr,
490 char *buf)
491{
492 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
493 struct lm63_data *data = lm63_update_device(dev);
494 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
495 + data->temp2_offset);
496}
497
498static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
499 const char *buf, size_t count)
500{
501 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
502 struct lm63_data *data = dev_get_drvdata(dev);
503 struct i2c_client *client = data->client;
504 int nr = attr->index;
505 long val;
506 int err;
507 int temp;
508 u8 reg;
509
510 err = kstrtol(buf, 10, &val);
511 if (err)
512 return err;
513
514 mutex_lock(&data->update_lock);
515 switch (nr) {
516 case 2:
517 reg = LM63_REG_REMOTE_TCRIT;
518 if (data->remote_unsigned)
519 temp = TEMP8U_TO_REG(val - data->temp2_offset);
520 else
521 temp = TEMP8_TO_REG(val - data->temp2_offset);
522 break;
523 case 1:
524 reg = LM63_REG_LOCAL_HIGH;
525 temp = TEMP8_TO_REG(val);
526 break;
527 default: /* lookup table */
528 reg = LM63_REG_LUT_TEMP(nr - 3);
529 temp = lut_temp_to_reg(data, val);
530 }
531 data->temp8[nr] = temp;
532 i2c_smbus_write_byte_data(client, reg, temp);
533 mutex_unlock(&data->update_lock);
534 return count;
535}
536
537static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
538 char *buf)
539{
540 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
541 struct lm63_data *data = lm63_update_device(dev);
542 int nr = attr->index;
543 int temp;
544
545 if (!nr) {
546 /*
547 * Use unsigned temperature unless its value is zero.
548 * If it is zero, use signed temperature.
549 */
550 if (data->temp11u)
551 temp = TEMP11_FROM_REG(data->temp11u);
552 else
553 temp = TEMP11_FROM_REG(data->temp11[nr]);
554 } else {
555 if (data->remote_unsigned && nr == 2)
556 temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
557 else
558 temp = TEMP11_FROM_REG(data->temp11[nr]);
559 }
560 return sprintf(buf, "%d\n", temp + data->temp2_offset);
561}
562
563static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
564 const char *buf, size_t count)
565{
566 static const u8 reg[6] = {
567 LM63_REG_REMOTE_LOW_MSB,
568 LM63_REG_REMOTE_LOW_LSB,
569 LM63_REG_REMOTE_HIGH_MSB,
570 LM63_REG_REMOTE_HIGH_LSB,
571 LM63_REG_REMOTE_OFFSET_MSB,
572 LM63_REG_REMOTE_OFFSET_LSB,
573 };
574
575 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
576 struct lm63_data *data = dev_get_drvdata(dev);
577 struct i2c_client *client = data->client;
578 long val;
579 int err;
580 int nr = attr->index;
581
582 err = kstrtol(buf, 10, &val);
583 if (err)
584 return err;
585
586 mutex_lock(&data->update_lock);
587 if (data->remote_unsigned && nr == 2)
588 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
589 else
590 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
591
592 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
593 data->temp11[nr] >> 8);
594 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
595 data->temp11[nr] & 0xff);
596 mutex_unlock(&data->update_lock);
597 return count;
598}
599
600/*
601 * Hysteresis register holds a relative value, while we want to present
602 * an absolute to user-space
603 */
604static ssize_t temp2_crit_hyst_show(struct device *dev,
605 struct device_attribute *dummy, char *buf)
606{
607 struct lm63_data *data = lm63_update_device(dev);
608 return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
609 + data->temp2_offset
610 - TEMP8_FROM_REG(data->temp2_crit_hyst));
611}
612
613static ssize_t show_lut_temp_hyst(struct device *dev,
614 struct device_attribute *devattr, char *buf)
615{
616 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
617 struct lm63_data *data = lm63_update_device(dev);
618
619 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
620 + data->temp2_offset
621 - TEMP8_FROM_REG(data->lut_temp_hyst));
622}
623
624/*
625 * And now the other way around, user-space provides an absolute
626 * hysteresis value and we have to store a relative one
627 */
628static ssize_t temp2_crit_hyst_store(struct device *dev,
629 struct device_attribute *dummy,
630 const char *buf, size_t count)
631{
632 struct lm63_data *data = dev_get_drvdata(dev);
633 struct i2c_client *client = data->client;
634 long val;
635 int err;
636 long hyst;
637
638 err = kstrtol(buf, 10, &val);
639 if (err)
640 return err;
641
642 mutex_lock(&data->update_lock);
643 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
644 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
645 HYST_TO_REG(hyst));
646 mutex_unlock(&data->update_lock);
647 return count;
648}
649
650/*
651 * Set conversion rate.
652 * client->update_lock must be held when calling this function.
653 */
654static void lm63_set_convrate(struct lm63_data *data, unsigned int interval)
655{
656 struct i2c_client *client = data->client;
657 unsigned int update_interval;
658 int i;
659
660 /* Shift calculations to avoid rounding errors */
661 interval <<= 6;
662
663 /* find the nearest update rate */
664 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
665 / data->max_convrate_hz;
666 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
667 if (interval >= update_interval * 3 / 4)
668 break;
669
670 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
671 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
672}
673
674static ssize_t update_interval_show(struct device *dev,
675 struct device_attribute *attr, char *buf)
676{
677 struct lm63_data *data = dev_get_drvdata(dev);
678
679 return sprintf(buf, "%u\n", data->update_interval);
680}
681
682static ssize_t update_interval_store(struct device *dev,
683 struct device_attribute *attr,
684 const char *buf, size_t count)
685{
686 struct lm63_data *data = dev_get_drvdata(dev);
687 unsigned long val;
688 int err;
689
690 err = kstrtoul(buf, 10, &val);
691 if (err)
692 return err;
693
694 mutex_lock(&data->update_lock);
695 lm63_set_convrate(data, clamp_val(val, 0, 100000));
696 mutex_unlock(&data->update_lock);
697
698 return count;
699}
700
701static ssize_t temp2_type_show(struct device *dev,
702 struct device_attribute *attr, char *buf)
703{
704 struct lm63_data *data = dev_get_drvdata(dev);
705
706 return sprintf(buf, data->trutherm ? "1\n" : "2\n");
707}
708
709static ssize_t temp2_type_store(struct device *dev,
710 struct device_attribute *attr,
711 const char *buf, size_t count)
712{
713 struct lm63_data *data = dev_get_drvdata(dev);
714 struct i2c_client *client = data->client;
715 unsigned long val;
716 int ret;
717 u8 reg;
718
719 ret = kstrtoul(buf, 10, &val);
720 if (ret < 0)
721 return ret;
722 if (val != 1 && val != 2)
723 return -EINVAL;
724
725 mutex_lock(&data->update_lock);
726 data->trutherm = val == 1;
727 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
728 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
729 reg | (data->trutherm ? 0x02 : 0x00));
730 data->valid = 0;
731 mutex_unlock(&data->update_lock);
732
733 return count;
734}
735
736static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy,
737 char *buf)
738{
739 struct lm63_data *data = lm63_update_device(dev);
740 return sprintf(buf, "%u\n", data->alarms);
741}
742
743static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
744 char *buf)
745{
746 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
747 struct lm63_data *data = lm63_update_device(dev);
748 int bitnr = attr->index;
749
750 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
751}
752
753static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
754static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
755 set_fan, 1);
756
757static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
758static DEVICE_ATTR_RW(pwm1_enable);
759static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
760 show_pwm1, set_pwm1, 1);
761static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
762 show_lut_temp, set_temp8, 3);
763static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
764 show_lut_temp_hyst, NULL, 3);
765static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
766 show_pwm1, set_pwm1, 2);
767static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
768 show_lut_temp, set_temp8, 4);
769static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
770 show_lut_temp_hyst, NULL, 4);
771static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
772 show_pwm1, set_pwm1, 3);
773static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
774 show_lut_temp, set_temp8, 5);
775static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
776 show_lut_temp_hyst, NULL, 5);
777static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
778 show_pwm1, set_pwm1, 4);
779static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
780 show_lut_temp, set_temp8, 6);
781static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
782 show_lut_temp_hyst, NULL, 6);
783static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
784 show_pwm1, set_pwm1, 5);
785static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
786 show_lut_temp, set_temp8, 7);
787static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
788 show_lut_temp_hyst, NULL, 7);
789static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
790 show_pwm1, set_pwm1, 6);
791static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
792 show_lut_temp, set_temp8, 8);
793static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
794 show_lut_temp_hyst, NULL, 8);
795static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
796 show_pwm1, set_pwm1, 7);
797static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
798 show_lut_temp, set_temp8, 9);
799static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
800 show_lut_temp_hyst, NULL, 9);
801static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
802 show_pwm1, set_pwm1, 8);
803static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
804 show_lut_temp, set_temp8, 10);
805static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
806 show_lut_temp_hyst, NULL, 10);
807static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
808 show_pwm1, set_pwm1, 9);
809static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
810 show_lut_temp, set_temp8, 11);
811static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
812 show_lut_temp_hyst, NULL, 11);
813static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
814 show_pwm1, set_pwm1, 10);
815static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
816 show_lut_temp, set_temp8, 12);
817static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
818 show_lut_temp_hyst, NULL, 12);
819static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
820 show_pwm1, set_pwm1, 11);
821static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
822 show_lut_temp, set_temp8, 13);
823static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
824 show_lut_temp_hyst, NULL, 13);
825static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
826 show_pwm1, set_pwm1, 12);
827static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
828 show_lut_temp, set_temp8, 14);
829static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
830 show_lut_temp_hyst, NULL, 14);
831
832static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
833static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
834 set_temp8, 1);
835
836static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
837static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
838 set_temp11, 1);
839static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
840 set_temp11, 2);
841static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
842 set_temp11, 3);
843static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
844 set_temp8, 2);
845static DEVICE_ATTR_RW(temp2_crit_hyst);
846
847static DEVICE_ATTR_RW(temp2_type);
848
849/* Individual alarm files */
850static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
851static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
852static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
853static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
854static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
855static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
856/* Raw alarm file for compatibility */
857static DEVICE_ATTR_RO(alarms);
858
859static DEVICE_ATTR_RW(update_interval);
860
861static struct attribute *lm63_attributes[] = {
862 &sensor_dev_attr_pwm1.dev_attr.attr,
863 &dev_attr_pwm1_enable.attr,
864 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
865 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
866 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
867 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
868 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
869 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
870 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
871 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
872 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
873 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
874 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
875 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
876 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
877 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
878 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
879 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
880 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
881 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
882 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
883 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
884 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
885 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
886 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
887 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
888
889 &sensor_dev_attr_temp1_input.dev_attr.attr,
890 &sensor_dev_attr_temp2_input.dev_attr.attr,
891 &sensor_dev_attr_temp2_min.dev_attr.attr,
892 &sensor_dev_attr_temp1_max.dev_attr.attr,
893 &sensor_dev_attr_temp2_max.dev_attr.attr,
894 &sensor_dev_attr_temp2_offset.dev_attr.attr,
895 &sensor_dev_attr_temp2_crit.dev_attr.attr,
896 &dev_attr_temp2_crit_hyst.attr,
897
898 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
899 &sensor_dev_attr_temp2_fault.dev_attr.attr,
900 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
901 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
902 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
903 &dev_attr_alarms.attr,
904 &dev_attr_update_interval.attr,
905 NULL
906};
907
908static struct attribute *lm63_attributes_temp2_type[] = {
909 &dev_attr_temp2_type.attr,
910 NULL
911};
912
913static const struct attribute_group lm63_group_temp2_type = {
914 .attrs = lm63_attributes_temp2_type,
915};
916
917static struct attribute *lm63_attributes_extra_lut[] = {
918 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
919 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
920 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
921 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
922 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
923 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
924 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
925 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
926 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
927 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
928 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
929 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
930 NULL
931};
932
933static const struct attribute_group lm63_group_extra_lut = {
934 .attrs = lm63_attributes_extra_lut,
935};
936
937/*
938 * On LM63, temp2_crit can be set only once, which should be job
939 * of the bootloader.
940 * On LM64, temp2_crit can always be set.
941 * On LM96163, temp2_crit can be set if bit 1 of the configuration
942 * register is true.
943 */
944static umode_t lm63_attribute_mode(struct kobject *kobj,
945 struct attribute *attr, int index)
946{
947 struct device *dev = container_of(kobj, struct device, kobj);
948 struct lm63_data *data = dev_get_drvdata(dev);
949
950 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
951 && (data->kind == lm64 ||
952 (data->kind == lm96163 && (data->config & 0x02))))
953 return attr->mode | S_IWUSR;
954
955 return attr->mode;
956}
957
958static const struct attribute_group lm63_group = {
959 .is_visible = lm63_attribute_mode,
960 .attrs = lm63_attributes,
961};
962
963static struct attribute *lm63_attributes_fan1[] = {
964 &sensor_dev_attr_fan1_input.dev_attr.attr,
965 &sensor_dev_attr_fan1_min.dev_attr.attr,
966
967 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
968 NULL
969};
970
971static const struct attribute_group lm63_group_fan1 = {
972 .attrs = lm63_attributes_fan1,
973};
974
975/*
976 * Real code
977 */
978
979/* Return 0 if detection is successful, -ENODEV otherwise */
980static int lm63_detect(struct i2c_client *client,
981 struct i2c_board_info *info)
982{
983 struct i2c_adapter *adapter = client->adapter;
984 u8 man_id, chip_id, reg_config1, reg_config2;
985 u8 reg_alert_status, reg_alert_mask;
986 int address = client->addr;
987
988 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
989 return -ENODEV;
990
991 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
992 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
993
994 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
995 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
996 reg_alert_status = i2c_smbus_read_byte_data(client,
997 LM63_REG_ALERT_STATUS);
998 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
999
1000 if (man_id != 0x01 /* National Semiconductor */
1001 || (reg_config1 & 0x18) != 0x00
1002 || (reg_config2 & 0xF8) != 0x00
1003 || (reg_alert_status & 0x20) != 0x00
1004 || (reg_alert_mask & 0xA4) != 0xA4) {
1005 dev_dbg(&adapter->dev,
1006 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
1007 man_id, chip_id);
1008 return -ENODEV;
1009 }
1010
1011 if (chip_id == 0x41 && address == 0x4c)
1012 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
1013 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1014 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
1015 else if (chip_id == 0x49 && address == 0x4c)
1016 strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
1017 else
1018 return -ENODEV;
1019
1020 return 0;
1021}
1022
1023/*
1024 * Ideally we shouldn't have to initialize anything, since the BIOS
1025 * should have taken care of everything
1026 */
1027static void lm63_init_client(struct lm63_data *data)
1028{
1029 struct i2c_client *client = data->client;
1030 struct device *dev = &client->dev;
1031 u8 convrate;
1032
1033 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1034 data->config_fan = i2c_smbus_read_byte_data(client,
1035 LM63_REG_CONFIG_FAN);
1036
1037 /* Start converting if needed */
1038 if (data->config & 0x40) { /* standby */
1039 dev_dbg(dev, "Switching to operational mode\n");
1040 data->config &= 0xA7;
1041 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
1042 data->config);
1043 }
1044 /* Tachometer is always enabled on LM64 */
1045 if (data->kind == lm64)
1046 data->config |= 0x04;
1047
1048 /* We may need pwm1_freq before ever updating the client data */
1049 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
1050 if (data->pwm1_freq == 0)
1051 data->pwm1_freq = 1;
1052
1053 switch (data->kind) {
1054 case lm63:
1055 case lm64:
1056 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
1057 data->lut_size = 8;
1058 break;
1059 case lm96163:
1060 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
1061 data->lut_size = 12;
1062 data->trutherm
1063 = i2c_smbus_read_byte_data(client,
1064 LM96163_REG_TRUTHERM) & 0x02;
1065 break;
1066 }
1067 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
1068 if (unlikely(convrate > LM63_MAX_CONVRATE))
1069 convrate = LM63_MAX_CONVRATE;
1070 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
1071 convrate);
1072
1073 /*
1074 * For LM96163, check if high resolution PWM
1075 * and unsigned temperature format is enabled.
1076 */
1077 if (data->kind == lm96163) {
1078 u8 config_enhanced
1079 = i2c_smbus_read_byte_data(client,
1080 LM96163_REG_CONFIG_ENHANCED);
1081 if (config_enhanced & 0x20)
1082 data->lut_temp_highres = true;
1083 if ((config_enhanced & 0x10)
1084 && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
1085 data->pwm_highres = true;
1086 if (config_enhanced & 0x08)
1087 data->remote_unsigned = true;
1088 }
1089
1090 /* Show some debug info about the LM63 configuration */
1091 if (data->kind == lm63)
1092 dev_dbg(dev, "Alert/tach pin configured for %s\n",
1093 (data->config & 0x04) ? "tachometer input" :
1094 "alert output");
1095 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n",
1096 (data->config_fan & 0x08) ? "1.4" : "360",
1097 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
1098 dev_dbg(dev, "PWM output active %s, %s mode\n",
1099 (data->config_fan & 0x10) ? "low" : "high",
1100 (data->config_fan & 0x20) ? "manual" : "auto");
1101}
1102
1103static int lm63_probe(struct i2c_client *client,
1104 const struct i2c_device_id *id)
1105{
1106 struct device *dev = &client->dev;
1107 struct device *hwmon_dev;
1108 struct lm63_data *data;
1109 int groups = 0;
1110
1111 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL);
1112 if (!data)
1113 return -ENOMEM;
1114
1115 data->client = client;
1116 mutex_init(&data->update_lock);
1117
1118 /* Set the device type */
1119 if (client->dev.of_node)
1120 data->kind = (enum chips)of_device_get_match_data(&client->dev);
1121 else
1122 data->kind = id->driver_data;
1123 if (data->kind == lm64)
1124 data->temp2_offset = 16000;
1125
1126 /* Initialize chip */
1127 lm63_init_client(data);
1128
1129 /* Register sysfs hooks */
1130 data->groups[groups++] = &lm63_group;
1131 if (data->config & 0x04) /* tachometer enabled */
1132 data->groups[groups++] = &lm63_group_fan1;
1133
1134 if (data->kind == lm96163) {
1135 data->groups[groups++] = &lm63_group_temp2_type;
1136 data->groups[groups++] = &lm63_group_extra_lut;
1137 }
1138
1139 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1140 data, data->groups);
1141 return PTR_ERR_OR_ZERO(hwmon_dev);
1142}
1143
1144/*
1145 * Driver data (common to all clients)
1146 */
1147
1148static const struct i2c_device_id lm63_id[] = {
1149 { "lm63", lm63 },
1150 { "lm64", lm64 },
1151 { "lm96163", lm96163 },
1152 { }
1153};
1154MODULE_DEVICE_TABLE(i2c, lm63_id);
1155
1156static const struct of_device_id lm63_of_match[] = {
1157 {
1158 .compatible = "national,lm63",
1159 .data = (void *)lm63
1160 },
1161 {
1162 .compatible = "national,lm64",
1163 .data = (void *)lm64
1164 },
1165 {
1166 .compatible = "national,lm96163",
1167 .data = (void *)lm96163
1168 },
1169 { },
1170};
1171MODULE_DEVICE_TABLE(of, lm63_of_match);
1172
1173static struct i2c_driver lm63_driver = {
1174 .class = I2C_CLASS_HWMON,
1175 .driver = {
1176 .name = "lm63",
1177 .of_match_table = of_match_ptr(lm63_of_match),
1178 },
1179 .probe = lm63_probe,
1180 .id_table = lm63_id,
1181 .detect = lm63_detect,
1182 .address_list = normal_i2c,
1183};
1184
1185module_i2c_driver(lm63_driver);
1186
1187MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1188MODULE_DESCRIPTION("LM63 driver");
1189MODULE_LICENSE("GPL");
1190