1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
4 * with integrated fan control
5 * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de>
6 * Based on the lm90 driver.
7 *
8 * The LM63 is a sensor chip made by National Semiconductor. It measures
9 * two temperatures (its own and one external one) and the speed of one
10 * fan, those speed it can additionally control. Complete datasheet can be
11 * obtained from National's website at:
12 * http://www.national.com/pf/LM/LM63.html
13 *
14 * The LM63 is basically an LM86 with fan speed monitoring and control
15 * capabilities added. It misses some of the LM86 features though:
16 * - No low limit for local temperature.
17 * - No critical limit for local temperature.
18 * - Critical limit for remote temperature can be changed only once. We
19 * will consider that the critical limit is read-only.
20 *
21 * The datasheet isn't very clear about what the tachometer reading is.
22 * I had a explanation from National Semiconductor though. The two lower
23 * bits of the read value have to be masked out. The value is still 16 bit
24 * in width.
25 */
26
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/jiffies.h>
31 #include <linux/i2c.h>
32 #include <linux/hwmon-sysfs.h>
33 #include <linux/hwmon.h>
34 #include <linux/err.h>
35 #include <linux/mutex.h>
36 #include <linux/of.h>
37 #include <linux/sysfs.h>
38 #include <linux/types.h>
39
40 /*
41 * Addresses to scan
42 * Address is fully defined internally and cannot be changed except for
43 * LM64 which has one pin dedicated to address selection.
44 * LM63 and LM96163 have address 0x4c.
45 * LM64 can have address 0x18 or 0x4e.
46 */
47
48 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
49
50 /*
51 * The LM63 registers
52 */
53
54 #define LM63_REG_CONFIG1 0x03
55 #define LM63_REG_CONVRATE 0x04
56 #define LM63_REG_CONFIG2 0xBF
57 #define LM63_REG_CONFIG_FAN 0x4A
58
59 #define LM63_REG_TACH_COUNT_MSB 0x47
60 #define LM63_REG_TACH_COUNT_LSB 0x46
61 #define LM63_REG_TACH_LIMIT_MSB 0x49
62 #define LM63_REG_TACH_LIMIT_LSB 0x48
63
64 #define LM63_REG_PWM_VALUE 0x4C
65 #define LM63_REG_PWM_FREQ 0x4D
66 #define LM63_REG_LUT_TEMP_HYST 0x4F
67 #define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr))
68 #define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr))
69
70 #define LM63_REG_LOCAL_TEMP 0x00
71 #define LM63_REG_LOCAL_HIGH 0x05
72
73 #define LM63_REG_REMOTE_TEMP_MSB 0x01
74 #define LM63_REG_REMOTE_TEMP_LSB 0x10
75 #define LM63_REG_REMOTE_OFFSET_MSB 0x11
76 #define LM63_REG_REMOTE_OFFSET_LSB 0x12
77 #define LM63_REG_REMOTE_HIGH_MSB 0x07
78 #define LM63_REG_REMOTE_HIGH_LSB 0x13
79 #define LM63_REG_REMOTE_LOW_MSB 0x08
80 #define LM63_REG_REMOTE_LOW_LSB 0x14
81 #define LM63_REG_REMOTE_TCRIT 0x19
82 #define LM63_REG_REMOTE_TCRIT_HYST 0x21
83
84 #define LM63_REG_ALERT_STATUS 0x02
85 #define LM63_REG_ALERT_MASK 0x16
86
87 #define LM63_REG_MAN_ID 0xFE
88 #define LM63_REG_CHIP_ID 0xFF
89
90 #define LM96163_REG_TRUTHERM 0x30
91 #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31
92 #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32
93 #define LM96163_REG_CONFIG_ENHANCED 0x45
94
95 #define LM63_MAX_CONVRATE 9
96
97 #define LM63_MAX_CONVRATE_HZ 32
98 #define LM96163_MAX_CONVRATE_HZ 26
99
100 /*
101 * Conversions and various macros
102 * For tachometer counts, the LM63 uses 16-bit values.
103 * For local temperature and high limit, remote critical limit and hysteresis
104 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
105 * For remote temperature, low and high limits, it uses signed 11-bit values
106 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
107 * For LM64 the actual remote diode temperature is 16 degree Celsius higher
108 * than the register reading. Remote temperature setpoints have to be
109 * adapted accordingly.
110 */
111
112 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
113 5400000 / (reg))
114 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
115 (5400000 / (val)) & 0xFFFC)
116 #define TEMP8_FROM_REG(reg) ((reg) * 1000)
117 #define TEMP8_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
118 127000), 1000)
119 #define TEMP8U_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, \
120 255000), 1000)
121 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
122 #define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \
123 127875), 125) * 32)
124 #define TEMP11U_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), 0, \
125 255875), 125) * 32)
126 #define HYST_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \
127 1000)
128
129 #define UPDATE_INTERVAL(max, rate) \
130 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
131
132 enum chips { lm63, lm64, lm96163 };
133
134 /*
135 * Client data (each client gets its own)
136 */
137
138 struct lm63_data {
139 struct i2c_client *client;
140 struct mutex update_lock;
141 const struct attribute_group *groups[5];
142 bool valid; /* false until following fields are valid */
143 char lut_valid; /* zero until lut fields are valid */
144 unsigned long last_updated; /* in jiffies */
145 unsigned long lut_last_updated; /* in jiffies */
146 enum chips kind;
147 int temp2_offset;
148
149 int update_interval; /* in milliseconds */
150 int max_convrate_hz;
151 int lut_size; /* 8 or 12 */
152
153 /* registers values */
154 u8 config, config_fan;
155 u16 fan[2]; /* 0: input
156 1: low limit */
157 u8 pwm1_freq;
158 u8 pwm1[13]; /* 0: current output
159 1-12: lookup table */
160 s8 temp8[15]; /* 0: local input
161 1: local high limit
162 2: remote critical limit
163 3-14: lookup table */
164 s16 temp11[4]; /* 0: remote input
165 1: remote low limit
166 2: remote high limit
167 3: remote offset */
168 u16 temp11u; /* remote input (unsigned) */
169 u8 temp2_crit_hyst;
170 u8 lut_temp_hyst;
171 u8 alarms;
172 bool pwm_highres;
173 bool lut_temp_highres;
174 bool remote_unsigned; /* true if unsigned remote upper limits */
175 bool trutherm;
176 };
177
temp8_from_reg(struct lm63_data * data,int nr)178 static inline int temp8_from_reg(struct lm63_data *data, int nr)
179 {
180 if (data->remote_unsigned)
181 return TEMP8_FROM_REG((u8)data->temp8[nr]);
182 return TEMP8_FROM_REG(data->temp8[nr]);
183 }
184
lut_temp_from_reg(struct lm63_data * data,int nr)185 static inline int lut_temp_from_reg(struct lm63_data *data, int nr)
186 {
187 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000);
188 }
189
lut_temp_to_reg(struct lm63_data * data,long val)190 static inline int lut_temp_to_reg(struct lm63_data *data, long val)
191 {
192 val -= data->temp2_offset;
193 if (data->lut_temp_highres)
194 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500);
195 else
196 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
197 }
198
199 /*
200 * Update the lookup table register cache.
201 * client->update_lock must be held when calling this function.
202 */
lm63_update_lut(struct lm63_data * data)203 static void lm63_update_lut(struct lm63_data *data)
204 {
205 struct i2c_client *client = data->client;
206 int i;
207
208 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) ||
209 !data->lut_valid) {
210 for (i = 0; i < data->lut_size; i++) {
211 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client,
212 LM63_REG_LUT_PWM(i));
213 data->temp8[3 + i] = i2c_smbus_read_byte_data(client,
214 LM63_REG_LUT_TEMP(i));
215 }
216 data->lut_temp_hyst = i2c_smbus_read_byte_data(client,
217 LM63_REG_LUT_TEMP_HYST);
218
219 data->lut_last_updated = jiffies;
220 data->lut_valid = 1;
221 }
222 }
223
lm63_update_device(struct device * dev)224 static struct lm63_data *lm63_update_device(struct device *dev)
225 {
226 struct lm63_data *data = dev_get_drvdata(dev);
227 struct i2c_client *client = data->client;
228 unsigned long next_update;
229
230 mutex_lock(&data->update_lock);
231
232 next_update = data->last_updated +
233 msecs_to_jiffies(data->update_interval);
234 if (time_after(jiffies, next_update) || !data->valid) {
235 if (data->config & 0x04) { /* tachometer enabled */
236 /* order matters for fan1_input */
237 data->fan[0] = i2c_smbus_read_byte_data(client,
238 LM63_REG_TACH_COUNT_LSB) & 0xFC;
239 data->fan[0] |= i2c_smbus_read_byte_data(client,
240 LM63_REG_TACH_COUNT_MSB) << 8;
241 data->fan[1] = (i2c_smbus_read_byte_data(client,
242 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
243 | (i2c_smbus_read_byte_data(client,
244 LM63_REG_TACH_LIMIT_MSB) << 8);
245 }
246
247 data->pwm1_freq = i2c_smbus_read_byte_data(client,
248 LM63_REG_PWM_FREQ);
249 if (data->pwm1_freq == 0)
250 data->pwm1_freq = 1;
251 data->pwm1[0] = i2c_smbus_read_byte_data(client,
252 LM63_REG_PWM_VALUE);
253
254 data->temp8[0] = i2c_smbus_read_byte_data(client,
255 LM63_REG_LOCAL_TEMP);
256 data->temp8[1] = i2c_smbus_read_byte_data(client,
257 LM63_REG_LOCAL_HIGH);
258
259 /* order matters for temp2_input */
260 data->temp11[0] = i2c_smbus_read_byte_data(client,
261 LM63_REG_REMOTE_TEMP_MSB) << 8;
262 data->temp11[0] |= i2c_smbus_read_byte_data(client,
263 LM63_REG_REMOTE_TEMP_LSB);
264 data->temp11[1] = (i2c_smbus_read_byte_data(client,
265 LM63_REG_REMOTE_LOW_MSB) << 8)
266 | i2c_smbus_read_byte_data(client,
267 LM63_REG_REMOTE_LOW_LSB);
268 data->temp11[2] = (i2c_smbus_read_byte_data(client,
269 LM63_REG_REMOTE_HIGH_MSB) << 8)
270 | i2c_smbus_read_byte_data(client,
271 LM63_REG_REMOTE_HIGH_LSB);
272 data->temp11[3] = (i2c_smbus_read_byte_data(client,
273 LM63_REG_REMOTE_OFFSET_MSB) << 8)
274 | i2c_smbus_read_byte_data(client,
275 LM63_REG_REMOTE_OFFSET_LSB);
276
277 if (data->kind == lm96163)
278 data->temp11u = (i2c_smbus_read_byte_data(client,
279 LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
280 | i2c_smbus_read_byte_data(client,
281 LM96163_REG_REMOTE_TEMP_U_LSB);
282
283 data->temp8[2] = i2c_smbus_read_byte_data(client,
284 LM63_REG_REMOTE_TCRIT);
285 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
286 LM63_REG_REMOTE_TCRIT_HYST);
287
288 data->alarms = i2c_smbus_read_byte_data(client,
289 LM63_REG_ALERT_STATUS) & 0x7F;
290
291 data->last_updated = jiffies;
292 data->valid = true;
293 }
294
295 lm63_update_lut(data);
296
297 mutex_unlock(&data->update_lock);
298
299 return data;
300 }
301
302 /*
303 * Trip points in the lookup table should be in ascending order for both
304 * temperatures and PWM output values.
305 */
lm63_lut_looks_bad(struct device * dev,struct lm63_data * data)306 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data)
307 {
308 int i;
309
310 mutex_lock(&data->update_lock);
311 lm63_update_lut(data);
312
313 for (i = 1; i < data->lut_size; i++) {
314 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
315 || data->temp8[3 + i - 1] > data->temp8[3 + i]) {
316 dev_warn(dev,
317 "Lookup table doesn't look sane (check entries %d and %d)\n",
318 i, i + 1);
319 break;
320 }
321 }
322 mutex_unlock(&data->update_lock);
323
324 return i == data->lut_size ? 0 : 1;
325 }
326
327 /*
328 * Sysfs callback functions and files
329 */
330
show_fan(struct device * dev,struct device_attribute * devattr,char * buf)331 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
332 char *buf)
333 {
334 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
335 struct lm63_data *data = lm63_update_device(dev);
336 int fan;
337
338 mutex_lock(&data->update_lock);
339 fan = FAN_FROM_REG(data->fan[attr->index]);
340 mutex_unlock(&data->update_lock);
341
342 return sprintf(buf, "%d\n", fan);
343 }
344
set_fan(struct device * dev,struct device_attribute * dummy,const char * buf,size_t count)345 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
346 const char *buf, size_t count)
347 {
348 struct lm63_data *data = dev_get_drvdata(dev);
349 struct i2c_client *client = data->client;
350 unsigned long val;
351 int err;
352
353 err = kstrtoul(buf, 10, &val);
354 if (err)
355 return err;
356
357 mutex_lock(&data->update_lock);
358 data->fan[1] = FAN_TO_REG(val);
359 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
360 data->fan[1] & 0xFF);
361 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
362 data->fan[1] >> 8);
363 mutex_unlock(&data->update_lock);
364 return count;
365 }
366
show_pwm1(struct device * dev,struct device_attribute * devattr,char * buf)367 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
368 char *buf)
369 {
370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
371 struct lm63_data *data = lm63_update_device(dev);
372 int nr = attr->index;
373 int pwm;
374
375 mutex_lock(&data->update_lock);
376 if (data->pwm_highres)
377 pwm = data->pwm1[nr];
378 else
379 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
380 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
381 (2 * data->pwm1_freq);
382 mutex_unlock(&data->update_lock);
383
384 return sprintf(buf, "%d\n", pwm);
385 }
386
set_pwm1(struct device * dev,struct device_attribute * devattr,const char * buf,size_t count)387 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
388 const char *buf, size_t count)
389 {
390 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
391 struct lm63_data *data = dev_get_drvdata(dev);
392 struct i2c_client *client = data->client;
393 int nr = attr->index;
394 unsigned long val;
395 int err;
396 u8 reg;
397
398 if (!(data->config_fan & 0x20)) /* register is read-only */
399 return -EPERM;
400
401 err = kstrtoul(buf, 10, &val);
402 if (err)
403 return err;
404
405 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
406 val = clamp_val(val, 0, 255);
407
408 mutex_lock(&data->update_lock);
409 data->pwm1[nr] = data->pwm_highres ? val :
410 (val * data->pwm1_freq * 2 + 127) / 255;
411 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
412 mutex_unlock(&data->update_lock);
413 return count;
414 }
415
pwm1_enable_show(struct device * dev,struct device_attribute * dummy,char * buf)416 static ssize_t pwm1_enable_show(struct device *dev,
417 struct device_attribute *dummy, char *buf)
418 {
419 struct lm63_data *data = lm63_update_device(dev);
420 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
421 }
422
pwm1_enable_store(struct device * dev,struct device_attribute * dummy,const char * buf,size_t count)423 static ssize_t pwm1_enable_store(struct device *dev,
424 struct device_attribute *dummy,
425 const char *buf, size_t count)
426 {
427 struct lm63_data *data = dev_get_drvdata(dev);
428 struct i2c_client *client = data->client;
429 unsigned long val;
430 int err;
431
432 err = kstrtoul(buf, 10, &val);
433 if (err)
434 return err;
435 if (val < 1 || val > 2)
436 return -EINVAL;
437
438 /*
439 * Only let the user switch to automatic mode if the lookup table
440 * looks sane.
441 */
442 if (val == 2 && lm63_lut_looks_bad(dev, data))
443 return -EPERM;
444
445 mutex_lock(&data->update_lock);
446 data->config_fan = i2c_smbus_read_byte_data(client,
447 LM63_REG_CONFIG_FAN);
448 if (val == 1)
449 data->config_fan |= 0x20;
450 else
451 data->config_fan &= ~0x20;
452 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
453 data->config_fan);
454 mutex_unlock(&data->update_lock);
455 return count;
456 }
457
458 /*
459 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
460 * For remote sensor registers temp2_offset has to be considered,
461 * for local sensor it must not.
462 * So we need separate 8bit accessors for local and remote sensor.
463 */
show_local_temp8(struct device * dev,struct device_attribute * devattr,char * buf)464 static ssize_t show_local_temp8(struct device *dev,
465 struct device_attribute *devattr,
466 char *buf)
467 {
468 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
469 struct lm63_data *data = lm63_update_device(dev);
470 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
471 }
472
show_remote_temp8(struct device * dev,struct device_attribute * devattr,char * buf)473 static ssize_t show_remote_temp8(struct device *dev,
474 struct device_attribute *devattr,
475 char *buf)
476 {
477 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
478 struct lm63_data *data = lm63_update_device(dev);
479 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
480 + data->temp2_offset);
481 }
482
show_lut_temp(struct device * dev,struct device_attribute * devattr,char * buf)483 static ssize_t show_lut_temp(struct device *dev,
484 struct device_attribute *devattr,
485 char *buf)
486 {
487 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
488 struct lm63_data *data = lm63_update_device(dev);
489 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
490 + data->temp2_offset);
491 }
492
set_temp8(struct device * dev,struct device_attribute * devattr,const char * buf,size_t count)493 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
494 const char *buf, size_t count)
495 {
496 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
497 struct lm63_data *data = dev_get_drvdata(dev);
498 struct i2c_client *client = data->client;
499 int nr = attr->index;
500 long val;
501 int err;
502 int temp;
503 u8 reg;
504
505 err = kstrtol(buf, 10, &val);
506 if (err)
507 return err;
508
509 mutex_lock(&data->update_lock);
510 switch (nr) {
511 case 2:
512 reg = LM63_REG_REMOTE_TCRIT;
513 if (data->remote_unsigned)
514 temp = TEMP8U_TO_REG(val - data->temp2_offset);
515 else
516 temp = TEMP8_TO_REG(val - data->temp2_offset);
517 break;
518 case 1:
519 reg = LM63_REG_LOCAL_HIGH;
520 temp = TEMP8_TO_REG(val);
521 break;
522 default: /* lookup table */
523 reg = LM63_REG_LUT_TEMP(nr - 3);
524 temp = lut_temp_to_reg(data, val);
525 }
526 data->temp8[nr] = temp;
527 i2c_smbus_write_byte_data(client, reg, temp);
528 mutex_unlock(&data->update_lock);
529 return count;
530 }
531
show_temp11(struct device * dev,struct device_attribute * devattr,char * buf)532 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
533 char *buf)
534 {
535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
536 struct lm63_data *data = lm63_update_device(dev);
537 int nr = attr->index;
538 int temp;
539
540 mutex_lock(&data->update_lock);
541 if (!nr) {
542 /*
543 * Use unsigned temperature unless its value is zero.
544 * If it is zero, use signed temperature.
545 */
546 if (data->temp11u)
547 temp = TEMP11_FROM_REG(data->temp11u);
548 else
549 temp = TEMP11_FROM_REG(data->temp11[nr]);
550 } else {
551 if (data->remote_unsigned && nr == 2)
552 temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
553 else
554 temp = TEMP11_FROM_REG(data->temp11[nr]);
555 }
556 temp += data->temp2_offset;
557 mutex_unlock(&data->update_lock);
558
559 return sprintf(buf, "%d\n", temp);
560 }
561
set_temp11(struct device * dev,struct device_attribute * devattr,const char * buf,size_t count)562 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
563 const char *buf, size_t count)
564 {
565 static const u8 reg[6] = {
566 LM63_REG_REMOTE_LOW_MSB,
567 LM63_REG_REMOTE_LOW_LSB,
568 LM63_REG_REMOTE_HIGH_MSB,
569 LM63_REG_REMOTE_HIGH_LSB,
570 LM63_REG_REMOTE_OFFSET_MSB,
571 LM63_REG_REMOTE_OFFSET_LSB,
572 };
573
574 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
575 struct lm63_data *data = dev_get_drvdata(dev);
576 struct i2c_client *client = data->client;
577 long val;
578 int err;
579 int nr = attr->index;
580
581 err = kstrtol(buf, 10, &val);
582 if (err)
583 return err;
584
585 mutex_lock(&data->update_lock);
586 if (data->remote_unsigned && nr == 2)
587 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
588 else
589 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
590
591 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
592 data->temp11[nr] >> 8);
593 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
594 data->temp11[nr] & 0xff);
595 mutex_unlock(&data->update_lock);
596 return count;
597 }
598
599 /*
600 * Hysteresis register holds a relative value, while we want to present
601 * an absolute to user-space
602 */
temp2_crit_hyst_show(struct device * dev,struct device_attribute * dummy,char * buf)603 static ssize_t temp2_crit_hyst_show(struct device *dev,
604 struct device_attribute *dummy, char *buf)
605 {
606 struct lm63_data *data = lm63_update_device(dev);
607 int temp;
608
609 mutex_lock(&data->update_lock);
610 temp = temp8_from_reg(data, 2) + data->temp2_offset
611 - TEMP8_FROM_REG(data->temp2_crit_hyst);
612 mutex_unlock(&data->update_lock);
613
614 return sprintf(buf, "%d\n", temp);
615 }
616
show_lut_temp_hyst(struct device * dev,struct device_attribute * devattr,char * buf)617 static ssize_t show_lut_temp_hyst(struct device *dev,
618 struct device_attribute *devattr, char *buf)
619 {
620 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
621 struct lm63_data *data = lm63_update_device(dev);
622 int temp;
623
624 mutex_lock(&data->update_lock);
625 temp = lut_temp_from_reg(data, attr->index) + data->temp2_offset
626 - TEMP8_FROM_REG(data->lut_temp_hyst);
627 mutex_unlock(&data->update_lock);
628
629 return sprintf(buf, "%d\n", temp);
630 }
631
632 /*
633 * And now the other way around, user-space provides an absolute
634 * hysteresis value and we have to store a relative one
635 */
temp2_crit_hyst_store(struct device * dev,struct device_attribute * dummy,const char * buf,size_t count)636 static ssize_t temp2_crit_hyst_store(struct device *dev,
637 struct device_attribute *dummy,
638 const char *buf, size_t count)
639 {
640 struct lm63_data *data = lm63_update_device(dev);
641 struct i2c_client *client = data->client;
642 long val;
643 int err;
644 long hyst;
645
646 err = kstrtol(buf, 10, &val);
647 if (err)
648 return err;
649
650 mutex_lock(&data->update_lock);
651 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
652 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
653 HYST_TO_REG(hyst));
654 mutex_unlock(&data->update_lock);
655 return count;
656 }
657
658 /*
659 * Set conversion rate.
660 * client->update_lock must be held when calling this function.
661 */
lm63_set_convrate(struct lm63_data * data,unsigned int interval)662 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval)
663 {
664 struct i2c_client *client = data->client;
665 unsigned int update_interval;
666 int i;
667
668 /* Shift calculations to avoid rounding errors */
669 interval <<= 6;
670
671 /* find the nearest update rate */
672 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
673 / data->max_convrate_hz;
674 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
675 if (interval >= update_interval * 3 / 4)
676 break;
677
678 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
679 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
680 }
681
update_interval_show(struct device * dev,struct device_attribute * attr,char * buf)682 static ssize_t update_interval_show(struct device *dev,
683 struct device_attribute *attr, char *buf)
684 {
685 struct lm63_data *data = dev_get_drvdata(dev);
686
687 return sprintf(buf, "%u\n", data->update_interval);
688 }
689
update_interval_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)690 static ssize_t update_interval_store(struct device *dev,
691 struct device_attribute *attr,
692 const char *buf, size_t count)
693 {
694 struct lm63_data *data = dev_get_drvdata(dev);
695 unsigned long val;
696 int err;
697
698 err = kstrtoul(buf, 10, &val);
699 if (err)
700 return err;
701
702 mutex_lock(&data->update_lock);
703 lm63_set_convrate(data, clamp_val(val, 0, 100000));
704 mutex_unlock(&data->update_lock);
705
706 return count;
707 }
708
temp2_type_show(struct device * dev,struct device_attribute * attr,char * buf)709 static ssize_t temp2_type_show(struct device *dev,
710 struct device_attribute *attr, char *buf)
711 {
712 struct lm63_data *data = dev_get_drvdata(dev);
713
714 return sprintf(buf, data->trutherm ? "1\n" : "2\n");
715 }
716
temp2_type_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)717 static ssize_t temp2_type_store(struct device *dev,
718 struct device_attribute *attr,
719 const char *buf, size_t count)
720 {
721 struct lm63_data *data = dev_get_drvdata(dev);
722 struct i2c_client *client = data->client;
723 unsigned long val;
724 int ret;
725 u8 reg;
726
727 ret = kstrtoul(buf, 10, &val);
728 if (ret < 0)
729 return ret;
730 if (val != 1 && val != 2)
731 return -EINVAL;
732
733 mutex_lock(&data->update_lock);
734 data->trutherm = val == 1;
735 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
736 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
737 reg | (data->trutherm ? 0x02 : 0x00));
738 data->valid = false;
739 mutex_unlock(&data->update_lock);
740
741 return count;
742 }
743
alarms_show(struct device * dev,struct device_attribute * dummy,char * buf)744 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy,
745 char *buf)
746 {
747 struct lm63_data *data = lm63_update_device(dev);
748 return sprintf(buf, "%u\n", data->alarms);
749 }
750
show_alarm(struct device * dev,struct device_attribute * devattr,char * buf)751 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
752 char *buf)
753 {
754 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
755 struct lm63_data *data = lm63_update_device(dev);
756 int bitnr = attr->index;
757
758 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
759 }
760
761 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
762 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
763 set_fan, 1);
764
765 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
766 static DEVICE_ATTR_RW(pwm1_enable);
767 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
768 show_pwm1, set_pwm1, 1);
769 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
770 show_lut_temp, set_temp8, 3);
771 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
772 show_lut_temp_hyst, NULL, 3);
773 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
774 show_pwm1, set_pwm1, 2);
775 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
776 show_lut_temp, set_temp8, 4);
777 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
778 show_lut_temp_hyst, NULL, 4);
779 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
780 show_pwm1, set_pwm1, 3);
781 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
782 show_lut_temp, set_temp8, 5);
783 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
784 show_lut_temp_hyst, NULL, 5);
785 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
786 show_pwm1, set_pwm1, 4);
787 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
788 show_lut_temp, set_temp8, 6);
789 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
790 show_lut_temp_hyst, NULL, 6);
791 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
792 show_pwm1, set_pwm1, 5);
793 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
794 show_lut_temp, set_temp8, 7);
795 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
796 show_lut_temp_hyst, NULL, 7);
797 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
798 show_pwm1, set_pwm1, 6);
799 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
800 show_lut_temp, set_temp8, 8);
801 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
802 show_lut_temp_hyst, NULL, 8);
803 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
804 show_pwm1, set_pwm1, 7);
805 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
806 show_lut_temp, set_temp8, 9);
807 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
808 show_lut_temp_hyst, NULL, 9);
809 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
810 show_pwm1, set_pwm1, 8);
811 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
812 show_lut_temp, set_temp8, 10);
813 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
814 show_lut_temp_hyst, NULL, 10);
815 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
816 show_pwm1, set_pwm1, 9);
817 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
818 show_lut_temp, set_temp8, 11);
819 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
820 show_lut_temp_hyst, NULL, 11);
821 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
822 show_pwm1, set_pwm1, 10);
823 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
824 show_lut_temp, set_temp8, 12);
825 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
826 show_lut_temp_hyst, NULL, 12);
827 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
828 show_pwm1, set_pwm1, 11);
829 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
830 show_lut_temp, set_temp8, 13);
831 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
832 show_lut_temp_hyst, NULL, 13);
833 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
834 show_pwm1, set_pwm1, 12);
835 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
836 show_lut_temp, set_temp8, 14);
837 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
838 show_lut_temp_hyst, NULL, 14);
839
840 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
841 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
842 set_temp8, 1);
843
844 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
845 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
846 set_temp11, 1);
847 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
848 set_temp11, 2);
849 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
850 set_temp11, 3);
851 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
852 set_temp8, 2);
853 static DEVICE_ATTR_RW(temp2_crit_hyst);
854
855 static DEVICE_ATTR_RW(temp2_type);
856
857 /* Individual alarm files */
858 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
859 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
860 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
861 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
862 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
863 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
864 /* Raw alarm file for compatibility */
865 static DEVICE_ATTR_RO(alarms);
866
867 static DEVICE_ATTR_RW(update_interval);
868
869 static struct attribute *lm63_attributes[] = {
870 &sensor_dev_attr_pwm1.dev_attr.attr,
871 &dev_attr_pwm1_enable.attr,
872 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
873 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
874 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
875 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
876 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
877 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
878 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
879 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
880 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
881 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
882 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
883 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
884 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
885 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
886 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
887 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
888 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
889 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
890 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
891 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
892 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
893 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
894 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
895 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
896
897 &sensor_dev_attr_temp1_input.dev_attr.attr,
898 &sensor_dev_attr_temp2_input.dev_attr.attr,
899 &sensor_dev_attr_temp2_min.dev_attr.attr,
900 &sensor_dev_attr_temp1_max.dev_attr.attr,
901 &sensor_dev_attr_temp2_max.dev_attr.attr,
902 &sensor_dev_attr_temp2_offset.dev_attr.attr,
903 &sensor_dev_attr_temp2_crit.dev_attr.attr,
904 &dev_attr_temp2_crit_hyst.attr,
905
906 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
907 &sensor_dev_attr_temp2_fault.dev_attr.attr,
908 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
909 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
910 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
911 &dev_attr_alarms.attr,
912 &dev_attr_update_interval.attr,
913 NULL
914 };
915
916 static struct attribute *lm63_attributes_temp2_type[] = {
917 &dev_attr_temp2_type.attr,
918 NULL
919 };
920
921 static const struct attribute_group lm63_group_temp2_type = {
922 .attrs = lm63_attributes_temp2_type,
923 };
924
925 static struct attribute *lm63_attributes_extra_lut[] = {
926 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
927 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
928 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
929 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
930 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
931 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
932 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
933 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
934 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
935 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
936 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
937 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
938 NULL
939 };
940
941 static const struct attribute_group lm63_group_extra_lut = {
942 .attrs = lm63_attributes_extra_lut,
943 };
944
945 /*
946 * On LM63, temp2_crit can be set only once, which should be job
947 * of the bootloader.
948 * On LM64, temp2_crit can always be set.
949 * On LM96163, temp2_crit can be set if bit 1 of the configuration
950 * register is true.
951 */
lm63_attribute_mode(struct kobject * kobj,struct attribute * attr,int index)952 static umode_t lm63_attribute_mode(struct kobject *kobj,
953 struct attribute *attr, int index)
954 {
955 struct device *dev = kobj_to_dev(kobj);
956 struct lm63_data *data = dev_get_drvdata(dev);
957
958 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
959 && (data->kind == lm64 ||
960 (data->kind == lm96163 && (data->config & 0x02))))
961 return attr->mode | S_IWUSR;
962
963 return attr->mode;
964 }
965
966 static const struct attribute_group lm63_group = {
967 .is_visible = lm63_attribute_mode,
968 .attrs = lm63_attributes,
969 };
970
971 static struct attribute *lm63_attributes_fan1[] = {
972 &sensor_dev_attr_fan1_input.dev_attr.attr,
973 &sensor_dev_attr_fan1_min.dev_attr.attr,
974
975 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
976 NULL
977 };
978
979 static const struct attribute_group lm63_group_fan1 = {
980 .attrs = lm63_attributes_fan1,
981 };
982
983 /*
984 * Real code
985 */
986
987 /* Return 0 if detection is successful, -ENODEV otherwise */
lm63_detect(struct i2c_client * client,struct i2c_board_info * info)988 static int lm63_detect(struct i2c_client *client,
989 struct i2c_board_info *info)
990 {
991 struct i2c_adapter *adapter = client->adapter;
992 u8 man_id, chip_id, reg_config1, reg_config2;
993 u8 reg_alert_status, reg_alert_mask;
994 int address = client->addr;
995
996 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
997 return -ENODEV;
998
999 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
1000 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
1001
1002 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1003 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
1004 reg_alert_status = i2c_smbus_read_byte_data(client,
1005 LM63_REG_ALERT_STATUS);
1006 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
1007
1008 if (man_id != 0x01 /* National Semiconductor */
1009 || (reg_config1 & 0x18) != 0x00
1010 || (reg_config2 & 0xF8) != 0x00
1011 || (reg_alert_status & 0x20) != 0x00
1012 || (reg_alert_mask & 0xA4) != 0xA4) {
1013 dev_dbg(&adapter->dev,
1014 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
1015 man_id, chip_id);
1016 return -ENODEV;
1017 }
1018
1019 if (chip_id == 0x41 && address == 0x4c)
1020 strscpy(info->type, "lm63", I2C_NAME_SIZE);
1021 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1022 strscpy(info->type, "lm64", I2C_NAME_SIZE);
1023 else if (chip_id == 0x49 && address == 0x4c)
1024 strscpy(info->type, "lm96163", I2C_NAME_SIZE);
1025 else
1026 return -ENODEV;
1027
1028 return 0;
1029 }
1030
1031 /*
1032 * Ideally we shouldn't have to initialize anything, since the BIOS
1033 * should have taken care of everything
1034 */
lm63_init_client(struct lm63_data * data)1035 static void lm63_init_client(struct lm63_data *data)
1036 {
1037 struct i2c_client *client = data->client;
1038 struct device *dev = &client->dev;
1039 u8 convrate;
1040
1041 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1042 data->config_fan = i2c_smbus_read_byte_data(client,
1043 LM63_REG_CONFIG_FAN);
1044
1045 /* Start converting if needed */
1046 if (data->config & 0x40) { /* standby */
1047 dev_dbg(dev, "Switching to operational mode\n");
1048 data->config &= 0xA7;
1049 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
1050 data->config);
1051 }
1052 /* Tachometer is always enabled on LM64 */
1053 if (data->kind == lm64)
1054 data->config |= 0x04;
1055
1056 /* We may need pwm1_freq before ever updating the client data */
1057 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
1058 if (data->pwm1_freq == 0)
1059 data->pwm1_freq = 1;
1060
1061 switch (data->kind) {
1062 case lm63:
1063 case lm64:
1064 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
1065 data->lut_size = 8;
1066 break;
1067 case lm96163:
1068 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
1069 data->lut_size = 12;
1070 data->trutherm
1071 = i2c_smbus_read_byte_data(client,
1072 LM96163_REG_TRUTHERM) & 0x02;
1073 break;
1074 }
1075 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
1076 if (unlikely(convrate > LM63_MAX_CONVRATE))
1077 convrate = LM63_MAX_CONVRATE;
1078 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
1079 convrate);
1080
1081 /*
1082 * For LM96163, check if high resolution PWM
1083 * and unsigned temperature format is enabled.
1084 */
1085 if (data->kind == lm96163) {
1086 u8 config_enhanced
1087 = i2c_smbus_read_byte_data(client,
1088 LM96163_REG_CONFIG_ENHANCED);
1089 if (config_enhanced & 0x20)
1090 data->lut_temp_highres = true;
1091 if ((config_enhanced & 0x10)
1092 && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
1093 data->pwm_highres = true;
1094 if (config_enhanced & 0x08)
1095 data->remote_unsigned = true;
1096 }
1097
1098 /* Show some debug info about the LM63 configuration */
1099 if (data->kind == lm63)
1100 dev_dbg(dev, "Alert/tach pin configured for %s\n",
1101 (data->config & 0x04) ? "tachometer input" :
1102 "alert output");
1103 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n",
1104 (data->config_fan & 0x08) ? "1.4" : "360",
1105 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
1106 dev_dbg(dev, "PWM output active %s, %s mode\n",
1107 (data->config_fan & 0x10) ? "low" : "high",
1108 (data->config_fan & 0x20) ? "manual" : "auto");
1109 }
1110
1111 static const struct i2c_device_id lm63_id[];
1112
lm63_probe(struct i2c_client * client)1113 static int lm63_probe(struct i2c_client *client)
1114 {
1115 struct device *dev = &client->dev;
1116 struct device *hwmon_dev;
1117 struct lm63_data *data;
1118 int groups = 0;
1119
1120 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL);
1121 if (!data)
1122 return -ENOMEM;
1123
1124 data->client = client;
1125 mutex_init(&data->update_lock);
1126
1127 /* Set the device type */
1128 data->kind = (uintptr_t)i2c_get_match_data(client);
1129 if (data->kind == lm64)
1130 data->temp2_offset = 16000;
1131
1132 /* Initialize chip */
1133 lm63_init_client(data);
1134
1135 /* Register sysfs hooks */
1136 data->groups[groups++] = &lm63_group;
1137 if (data->config & 0x04) /* tachometer enabled */
1138 data->groups[groups++] = &lm63_group_fan1;
1139
1140 if (data->kind == lm96163) {
1141 data->groups[groups++] = &lm63_group_temp2_type;
1142 data->groups[groups++] = &lm63_group_extra_lut;
1143 }
1144
1145 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1146 data, data->groups);
1147 return PTR_ERR_OR_ZERO(hwmon_dev);
1148 }
1149
1150 /*
1151 * Driver data (common to all clients)
1152 */
1153
1154 static const struct i2c_device_id lm63_id[] = {
1155 { "lm63", lm63 },
1156 { "lm64", lm64 },
1157 { "lm96163", lm96163 },
1158 { }
1159 };
1160 MODULE_DEVICE_TABLE(i2c, lm63_id);
1161
1162 static const struct of_device_id __maybe_unused lm63_of_match[] = {
1163 {
1164 .compatible = "national,lm63",
1165 .data = (void *)lm63
1166 },
1167 {
1168 .compatible = "national,lm64",
1169 .data = (void *)lm64
1170 },
1171 {
1172 .compatible = "national,lm96163",
1173 .data = (void *)lm96163
1174 },
1175 { },
1176 };
1177 MODULE_DEVICE_TABLE(of, lm63_of_match);
1178
1179 static struct i2c_driver lm63_driver = {
1180 .class = I2C_CLASS_HWMON,
1181 .driver = {
1182 .name = "lm63",
1183 .of_match_table = of_match_ptr(lm63_of_match),
1184 },
1185 .probe = lm63_probe,
1186 .id_table = lm63_id,
1187 .detect = lm63_detect,
1188 .address_list = normal_i2c,
1189 };
1190
1191 module_i2c_driver(lm63_driver);
1192
1193 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1194 MODULE_DESCRIPTION("LM63 driver");
1195 MODULE_LICENSE("GPL");
1196