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1/*
2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
4 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
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/sysfs.h>
50
51/*
52 * Addresses to scan
53 * Address is fully defined internally and cannot be changed.
54 */
55
56static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
57
58/*
59 * The LM63 registers
60 */
61
62#define LM63_REG_CONFIG1 0x03
63#define LM63_REG_CONFIG2 0xBF
64#define LM63_REG_CONFIG_FAN 0x4A
65
66#define LM63_REG_TACH_COUNT_MSB 0x47
67#define LM63_REG_TACH_COUNT_LSB 0x46
68#define LM63_REG_TACH_LIMIT_MSB 0x49
69#define LM63_REG_TACH_LIMIT_LSB 0x48
70
71#define LM63_REG_PWM_VALUE 0x4C
72#define LM63_REG_PWM_FREQ 0x4D
73
74#define LM63_REG_LOCAL_TEMP 0x00
75#define LM63_REG_LOCAL_HIGH 0x05
76
77#define LM63_REG_REMOTE_TEMP_MSB 0x01
78#define LM63_REG_REMOTE_TEMP_LSB 0x10
79#define LM63_REG_REMOTE_OFFSET_MSB 0x11
80#define LM63_REG_REMOTE_OFFSET_LSB 0x12
81#define LM63_REG_REMOTE_HIGH_MSB 0x07
82#define LM63_REG_REMOTE_HIGH_LSB 0x13
83#define LM63_REG_REMOTE_LOW_MSB 0x08
84#define LM63_REG_REMOTE_LOW_LSB 0x14
85#define LM63_REG_REMOTE_TCRIT 0x19
86#define LM63_REG_REMOTE_TCRIT_HYST 0x21
87
88#define LM63_REG_ALERT_STATUS 0x02
89#define LM63_REG_ALERT_MASK 0x16
90
91#define LM63_REG_MAN_ID 0xFE
92#define LM63_REG_CHIP_ID 0xFF
93
94/*
95 * Conversions and various macros
96 * For tachometer counts, the LM63 uses 16-bit values.
97 * For local temperature and high limit, remote critical limit and hysteresis
98 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
99 * For remote temperature, low and high limits, it uses signed 11-bit values
100 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
101 * For LM64 the actual remote diode temperature is 16 degree Celsius higher
102 * than the register reading. Remote temperature setpoints have to be
103 * adapted accordingly.
104 */
105
106#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
107 5400000 / (reg))
108#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
109 (5400000 / (val)) & 0xFFFC)
110#define TEMP8_FROM_REG(reg) ((reg) * 1000)
111#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
112 (val) >= 127000 ? 127 : \
113 (val) < 0 ? ((val) - 500) / 1000 : \
114 ((val) + 500) / 1000)
115#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
116#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
117 (val) >= 127875 ? 0x7FE0 : \
118 (val) < 0 ? ((val) - 62) / 125 * 32 : \
119 ((val) + 62) / 125 * 32)
120#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
121 (val) >= 127000 ? 127 : \
122 ((val) + 500) / 1000)
123
124/*
125 * Functions declaration
126 */
127
128static int lm63_probe(struct i2c_client *client,
129 const struct i2c_device_id *id);
130static int lm63_remove(struct i2c_client *client);
131
132static struct lm63_data *lm63_update_device(struct device *dev);
133
134static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
135static void lm63_init_client(struct i2c_client *client);
136
137enum chips { lm63, lm64 };
138
139/*
140 * Driver data (common to all clients)
141 */
142
143static const struct i2c_device_id lm63_id[] = {
144 { "lm63", lm63 },
145 { "lm64", lm64 },
146 { }
147};
148MODULE_DEVICE_TABLE(i2c, lm63_id);
149
150static struct i2c_driver lm63_driver = {
151 .class = I2C_CLASS_HWMON,
152 .driver = {
153 .name = "lm63",
154 },
155 .probe = lm63_probe,
156 .remove = lm63_remove,
157 .id_table = lm63_id,
158 .detect = lm63_detect,
159 .address_list = normal_i2c,
160};
161
162/*
163 * Client data (each client gets its own)
164 */
165
166struct lm63_data {
167 struct device *hwmon_dev;
168 struct mutex update_lock;
169 char valid; /* zero until following fields are valid */
170 unsigned long last_updated; /* in jiffies */
171 int kind;
172 int temp2_offset;
173
174 /* registers values */
175 u8 config, config_fan;
176 u16 fan[2]; /* 0: input
177 1: low limit */
178 u8 pwm1_freq;
179 u8 pwm1_value;
180 s8 temp8[3]; /* 0: local input
181 1: local high limit
182 2: remote critical limit */
183 s16 temp11[3]; /* 0: remote input
184 1: remote low limit
185 2: remote high limit */
186 u8 temp2_crit_hyst;
187 u8 alarms;
188};
189
190/*
191 * Sysfs callback functions and files
192 */
193
194static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
195 char *buf)
196{
197 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
198 struct lm63_data *data = lm63_update_device(dev);
199 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
200}
201
202static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
203 const char *buf, size_t count)
204{
205 struct i2c_client *client = to_i2c_client(dev);
206 struct lm63_data *data = i2c_get_clientdata(client);
207 unsigned long val = simple_strtoul(buf, NULL, 10);
208
209 mutex_lock(&data->update_lock);
210 data->fan[1] = FAN_TO_REG(val);
211 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
212 data->fan[1] & 0xFF);
213 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
214 data->fan[1] >> 8);
215 mutex_unlock(&data->update_lock);
216 return count;
217}
218
219static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
220 char *buf)
221{
222 struct lm63_data *data = lm63_update_device(dev);
223 return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
224 255 : (data->pwm1_value * 255 + data->pwm1_freq) /
225 (2 * data->pwm1_freq));
226}
227
228static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
229 const char *buf, size_t count)
230{
231 struct i2c_client *client = to_i2c_client(dev);
232 struct lm63_data *data = i2c_get_clientdata(client);
233 unsigned long val;
234
235 if (!(data->config_fan & 0x20)) /* register is read-only */
236 return -EPERM;
237
238 val = simple_strtoul(buf, NULL, 10);
239 mutex_lock(&data->update_lock);
240 data->pwm1_value = val <= 0 ? 0 :
241 val >= 255 ? 2 * data->pwm1_freq :
242 (val * data->pwm1_freq * 2 + 127) / 255;
243 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
244 mutex_unlock(&data->update_lock);
245 return count;
246}
247
248static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
249 char *buf)
250{
251 struct lm63_data *data = lm63_update_device(dev);
252 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
253}
254
255/*
256 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
257 * For remote sensor registers temp2_offset has to be considered,
258 * for local sensor it must not.
259 * So we need separate 8bit accessors for local and remote sensor.
260 */
261static ssize_t show_local_temp8(struct device *dev,
262 struct device_attribute *devattr,
263 char *buf)
264{
265 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
266 struct lm63_data *data = lm63_update_device(dev);
267 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
268}
269
270static ssize_t show_remote_temp8(struct device *dev,
271 struct device_attribute *devattr,
272 char *buf)
273{
274 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
275 struct lm63_data *data = lm63_update_device(dev);
276 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])
277 + data->temp2_offset);
278}
279
280static ssize_t set_local_temp8(struct device *dev,
281 struct device_attribute *dummy,
282 const char *buf, size_t count)
283{
284 struct i2c_client *client = to_i2c_client(dev);
285 struct lm63_data *data = i2c_get_clientdata(client);
286 long val = simple_strtol(buf, NULL, 10);
287
288 mutex_lock(&data->update_lock);
289 data->temp8[1] = TEMP8_TO_REG(val);
290 i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
291 mutex_unlock(&data->update_lock);
292 return count;
293}
294
295static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
296 char *buf)
297{
298 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
299 struct lm63_data *data = lm63_update_device(dev);
300 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])
301 + data->temp2_offset);
302}
303
304static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
305 const char *buf, size_t count)
306{
307 static const u8 reg[4] = {
308 LM63_REG_REMOTE_LOW_MSB,
309 LM63_REG_REMOTE_LOW_LSB,
310 LM63_REG_REMOTE_HIGH_MSB,
311 LM63_REG_REMOTE_HIGH_LSB,
312 };
313
314 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
315 struct i2c_client *client = to_i2c_client(dev);
316 struct lm63_data *data = i2c_get_clientdata(client);
317 long val = simple_strtol(buf, NULL, 10);
318 int nr = attr->index;
319
320 mutex_lock(&data->update_lock);
321 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
322 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
323 data->temp11[nr] >> 8);
324 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
325 data->temp11[nr] & 0xff);
326 mutex_unlock(&data->update_lock);
327 return count;
328}
329
330/* Hysteresis register holds a relative value, while we want to present
331 an absolute to user-space */
332static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
333 char *buf)
334{
335 struct lm63_data *data = lm63_update_device(dev);
336 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
337 + data->temp2_offset
338 - TEMP8_FROM_REG(data->temp2_crit_hyst));
339}
340
341/* And now the other way around, user-space provides an absolute
342 hysteresis value and we have to store a relative one */
343static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
344 const char *buf, size_t count)
345{
346 struct i2c_client *client = to_i2c_client(dev);
347 struct lm63_data *data = i2c_get_clientdata(client);
348 long val = simple_strtol(buf, NULL, 10);
349 long hyst;
350
351 mutex_lock(&data->update_lock);
352 hyst = TEMP8_FROM_REG(data->temp8[2]) + data->temp2_offset - val;
353 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
354 HYST_TO_REG(hyst));
355 mutex_unlock(&data->update_lock);
356 return count;
357}
358
359static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
360 char *buf)
361{
362 struct lm63_data *data = lm63_update_device(dev);
363 return sprintf(buf, "%u\n", data->alarms);
364}
365
366static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
367 char *buf)
368{
369 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
370 struct lm63_data *data = lm63_update_device(dev);
371 int bitnr = attr->index;
372
373 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
374}
375
376static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
377static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
378 set_fan, 1);
379
380static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
381static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
382
383static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
384static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
385 set_local_temp8, 1);
386
387static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
388static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
389 set_temp11, 1);
390static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
391 set_temp11, 2);
392/*
393 * On LM63, temp2_crit can be set only once, which should be job
394 * of the bootloader.
395 */
396static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
397 NULL, 2);
398static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
399 set_temp2_crit_hyst);
400
401/* Individual alarm files */
402static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
403static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
404static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
405static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
406static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
407static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
408/* Raw alarm file for compatibility */
409static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
410
411static struct attribute *lm63_attributes[] = {
412 &dev_attr_pwm1.attr,
413 &dev_attr_pwm1_enable.attr,
414 &sensor_dev_attr_temp1_input.dev_attr.attr,
415 &sensor_dev_attr_temp2_input.dev_attr.attr,
416 &sensor_dev_attr_temp2_min.dev_attr.attr,
417 &sensor_dev_attr_temp1_max.dev_attr.attr,
418 &sensor_dev_attr_temp2_max.dev_attr.attr,
419 &sensor_dev_attr_temp2_crit.dev_attr.attr,
420 &dev_attr_temp2_crit_hyst.attr,
421
422 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
423 &sensor_dev_attr_temp2_fault.dev_attr.attr,
424 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
425 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
426 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
427 &dev_attr_alarms.attr,
428 NULL
429};
430
431static const struct attribute_group lm63_group = {
432 .attrs = lm63_attributes,
433};
434
435static struct attribute *lm63_attributes_fan1[] = {
436 &sensor_dev_attr_fan1_input.dev_attr.attr,
437 &sensor_dev_attr_fan1_min.dev_attr.attr,
438
439 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
440 NULL
441};
442
443static const struct attribute_group lm63_group_fan1 = {
444 .attrs = lm63_attributes_fan1,
445};
446
447/*
448 * Real code
449 */
450
451/* Return 0 if detection is successful, -ENODEV otherwise */
452static int lm63_detect(struct i2c_client *new_client,
453 struct i2c_board_info *info)
454{
455 struct i2c_adapter *adapter = new_client->adapter;
456 u8 man_id, chip_id, reg_config1, reg_config2;
457 u8 reg_alert_status, reg_alert_mask;
458 int address = new_client->addr;
459
460 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
461 return -ENODEV;
462
463 man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID);
464 chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID);
465
466 reg_config1 = i2c_smbus_read_byte_data(new_client,
467 LM63_REG_CONFIG1);
468 reg_config2 = i2c_smbus_read_byte_data(new_client,
469 LM63_REG_CONFIG2);
470 reg_alert_status = i2c_smbus_read_byte_data(new_client,
471 LM63_REG_ALERT_STATUS);
472 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
473 LM63_REG_ALERT_MASK);
474
475 if (man_id != 0x01 /* National Semiconductor */
476 || (reg_config1 & 0x18) != 0x00
477 || (reg_config2 & 0xF8) != 0x00
478 || (reg_alert_status & 0x20) != 0x00
479 || (reg_alert_mask & 0xA4) != 0xA4) {
480 dev_dbg(&adapter->dev,
481 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
482 man_id, chip_id);
483 return -ENODEV;
484 }
485
486 if (chip_id == 0x41 && address == 0x4c)
487 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
488 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
489 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
490 else
491 return -ENODEV;
492
493 return 0;
494}
495
496static int lm63_probe(struct i2c_client *new_client,
497 const struct i2c_device_id *id)
498{
499 struct lm63_data *data;
500 int err;
501
502 data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
503 if (!data) {
504 err = -ENOMEM;
505 goto exit;
506 }
507
508 i2c_set_clientdata(new_client, data);
509 data->valid = 0;
510 mutex_init(&data->update_lock);
511
512 /* Set the device type */
513 data->kind = id->driver_data;
514 if (data->kind == lm64)
515 data->temp2_offset = 16000;
516
517 /* Initialize chip */
518 lm63_init_client(new_client);
519
520 /* Register sysfs hooks */
521 if ((err = sysfs_create_group(&new_client->dev.kobj,
522 &lm63_group)))
523 goto exit_free;
524 if (data->config & 0x04) { /* tachometer enabled */
525 if ((err = sysfs_create_group(&new_client->dev.kobj,
526 &lm63_group_fan1)))
527 goto exit_remove_files;
528 }
529
530 data->hwmon_dev = hwmon_device_register(&new_client->dev);
531 if (IS_ERR(data->hwmon_dev)) {
532 err = PTR_ERR(data->hwmon_dev);
533 goto exit_remove_files;
534 }
535
536 return 0;
537
538exit_remove_files:
539 sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
540 sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
541exit_free:
542 kfree(data);
543exit:
544 return err;
545}
546
547/* Idealy we shouldn't have to initialize anything, since the BIOS
548 should have taken care of everything */
549static void lm63_init_client(struct i2c_client *client)
550{
551 struct lm63_data *data = i2c_get_clientdata(client);
552
553 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
554 data->config_fan = i2c_smbus_read_byte_data(client,
555 LM63_REG_CONFIG_FAN);
556
557 /* Start converting if needed */
558 if (data->config & 0x40) { /* standby */
559 dev_dbg(&client->dev, "Switching to operational mode\n");
560 data->config &= 0xA7;
561 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
562 data->config);
563 }
564
565 /* We may need pwm1_freq before ever updating the client data */
566 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
567 if (data->pwm1_freq == 0)
568 data->pwm1_freq = 1;
569
570 /* Show some debug info about the LM63 configuration */
571 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
572 (data->config & 0x04) ? "tachometer input" :
573 "alert output");
574 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
575 (data->config_fan & 0x08) ? "1.4" : "360",
576 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
577 dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
578 (data->config_fan & 0x10) ? "low" : "high",
579 (data->config_fan & 0x20) ? "manual" : "auto");
580}
581
582static int lm63_remove(struct i2c_client *client)
583{
584 struct lm63_data *data = i2c_get_clientdata(client);
585
586 hwmon_device_unregister(data->hwmon_dev);
587 sysfs_remove_group(&client->dev.kobj, &lm63_group);
588 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
589
590 kfree(data);
591 return 0;
592}
593
594static struct lm63_data *lm63_update_device(struct device *dev)
595{
596 struct i2c_client *client = to_i2c_client(dev);
597 struct lm63_data *data = i2c_get_clientdata(client);
598
599 mutex_lock(&data->update_lock);
600
601 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
602 if (data->config & 0x04) { /* tachometer enabled */
603 /* order matters for fan1_input */
604 data->fan[0] = i2c_smbus_read_byte_data(client,
605 LM63_REG_TACH_COUNT_LSB) & 0xFC;
606 data->fan[0] |= i2c_smbus_read_byte_data(client,
607 LM63_REG_TACH_COUNT_MSB) << 8;
608 data->fan[1] = (i2c_smbus_read_byte_data(client,
609 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
610 | (i2c_smbus_read_byte_data(client,
611 LM63_REG_TACH_LIMIT_MSB) << 8);
612 }
613
614 data->pwm1_freq = i2c_smbus_read_byte_data(client,
615 LM63_REG_PWM_FREQ);
616 if (data->pwm1_freq == 0)
617 data->pwm1_freq = 1;
618 data->pwm1_value = i2c_smbus_read_byte_data(client,
619 LM63_REG_PWM_VALUE);
620
621 data->temp8[0] = i2c_smbus_read_byte_data(client,
622 LM63_REG_LOCAL_TEMP);
623 data->temp8[1] = i2c_smbus_read_byte_data(client,
624 LM63_REG_LOCAL_HIGH);
625
626 /* order matters for temp2_input */
627 data->temp11[0] = i2c_smbus_read_byte_data(client,
628 LM63_REG_REMOTE_TEMP_MSB) << 8;
629 data->temp11[0] |= i2c_smbus_read_byte_data(client,
630 LM63_REG_REMOTE_TEMP_LSB);
631 data->temp11[1] = (i2c_smbus_read_byte_data(client,
632 LM63_REG_REMOTE_LOW_MSB) << 8)
633 | i2c_smbus_read_byte_data(client,
634 LM63_REG_REMOTE_LOW_LSB);
635 data->temp11[2] = (i2c_smbus_read_byte_data(client,
636 LM63_REG_REMOTE_HIGH_MSB) << 8)
637 | i2c_smbus_read_byte_data(client,
638 LM63_REG_REMOTE_HIGH_LSB);
639 data->temp8[2] = i2c_smbus_read_byte_data(client,
640 LM63_REG_REMOTE_TCRIT);
641 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
642 LM63_REG_REMOTE_TCRIT_HYST);
643
644 data->alarms = i2c_smbus_read_byte_data(client,
645 LM63_REG_ALERT_STATUS) & 0x7F;
646
647 data->last_updated = jiffies;
648 data->valid = 1;
649 }
650
651 mutex_unlock(&data->update_lock);
652
653 return data;
654}
655
656static int __init sensors_lm63_init(void)
657{
658 return i2c_add_driver(&lm63_driver);
659}
660
661static void __exit sensors_lm63_exit(void)
662{
663 i2c_del_driver(&lm63_driver);
664}
665
666MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
667MODULE_DESCRIPTION("LM63 driver");
668MODULE_LICENSE("GPL");
669
670module_init(sensors_lm63_init);
671module_exit(sensors_lm63_exit);
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
48static 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
132enum chips { lm63, lm64, lm96163 };
133
134/*
135 * Client data (each client gets its own)
136 */
137
138struct 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
178static 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
185static 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
190static 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 */
203static 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
224static 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 */
306static 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
331static 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 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
337}
338
339static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
340 const char *buf, size_t count)
341{
342 struct lm63_data *data = dev_get_drvdata(dev);
343 struct i2c_client *client = data->client;
344 unsigned long val;
345 int err;
346
347 err = kstrtoul(buf, 10, &val);
348 if (err)
349 return err;
350
351 mutex_lock(&data->update_lock);
352 data->fan[1] = FAN_TO_REG(val);
353 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
354 data->fan[1] & 0xFF);
355 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
356 data->fan[1] >> 8);
357 mutex_unlock(&data->update_lock);
358 return count;
359}
360
361static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
362 char *buf)
363{
364 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
365 struct lm63_data *data = lm63_update_device(dev);
366 int nr = attr->index;
367 int pwm;
368
369 if (data->pwm_highres)
370 pwm = data->pwm1[nr];
371 else
372 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
373 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
374 (2 * data->pwm1_freq);
375
376 return sprintf(buf, "%d\n", pwm);
377}
378
379static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
380 const char *buf, size_t count)
381{
382 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
383 struct lm63_data *data = dev_get_drvdata(dev);
384 struct i2c_client *client = data->client;
385 int nr = attr->index;
386 unsigned long val;
387 int err;
388 u8 reg;
389
390 if (!(data->config_fan & 0x20)) /* register is read-only */
391 return -EPERM;
392
393 err = kstrtoul(buf, 10, &val);
394 if (err)
395 return err;
396
397 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
398 val = clamp_val(val, 0, 255);
399
400 mutex_lock(&data->update_lock);
401 data->pwm1[nr] = data->pwm_highres ? val :
402 (val * data->pwm1_freq * 2 + 127) / 255;
403 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
404 mutex_unlock(&data->update_lock);
405 return count;
406}
407
408static ssize_t pwm1_enable_show(struct device *dev,
409 struct device_attribute *dummy, char *buf)
410{
411 struct lm63_data *data = lm63_update_device(dev);
412 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
413}
414
415static ssize_t pwm1_enable_store(struct device *dev,
416 struct device_attribute *dummy,
417 const char *buf, size_t count)
418{
419 struct lm63_data *data = dev_get_drvdata(dev);
420 struct i2c_client *client = data->client;
421 unsigned long val;
422 int err;
423
424 err = kstrtoul(buf, 10, &val);
425 if (err)
426 return err;
427 if (val < 1 || val > 2)
428 return -EINVAL;
429
430 /*
431 * Only let the user switch to automatic mode if the lookup table
432 * looks sane.
433 */
434 if (val == 2 && lm63_lut_looks_bad(dev, data))
435 return -EPERM;
436
437 mutex_lock(&data->update_lock);
438 data->config_fan = i2c_smbus_read_byte_data(client,
439 LM63_REG_CONFIG_FAN);
440 if (val == 1)
441 data->config_fan |= 0x20;
442 else
443 data->config_fan &= ~0x20;
444 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
445 data->config_fan);
446 mutex_unlock(&data->update_lock);
447 return count;
448}
449
450/*
451 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
452 * For remote sensor registers temp2_offset has to be considered,
453 * for local sensor it must not.
454 * So we need separate 8bit accessors for local and remote sensor.
455 */
456static ssize_t show_local_temp8(struct device *dev,
457 struct device_attribute *devattr,
458 char *buf)
459{
460 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
461 struct lm63_data *data = lm63_update_device(dev);
462 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
463}
464
465static ssize_t show_remote_temp8(struct device *dev,
466 struct device_attribute *devattr,
467 char *buf)
468{
469 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
470 struct lm63_data *data = lm63_update_device(dev);
471 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
472 + data->temp2_offset);
473}
474
475static ssize_t show_lut_temp(struct device *dev,
476 struct device_attribute *devattr,
477 char *buf)
478{
479 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
480 struct lm63_data *data = lm63_update_device(dev);
481 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
482 + data->temp2_offset);
483}
484
485static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
486 const char *buf, size_t count)
487{
488 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
489 struct lm63_data *data = dev_get_drvdata(dev);
490 struct i2c_client *client = data->client;
491 int nr = attr->index;
492 long val;
493 int err;
494 int temp;
495 u8 reg;
496
497 err = kstrtol(buf, 10, &val);
498 if (err)
499 return err;
500
501 mutex_lock(&data->update_lock);
502 switch (nr) {
503 case 2:
504 reg = LM63_REG_REMOTE_TCRIT;
505 if (data->remote_unsigned)
506 temp = TEMP8U_TO_REG(val - data->temp2_offset);
507 else
508 temp = TEMP8_TO_REG(val - data->temp2_offset);
509 break;
510 case 1:
511 reg = LM63_REG_LOCAL_HIGH;
512 temp = TEMP8_TO_REG(val);
513 break;
514 default: /* lookup table */
515 reg = LM63_REG_LUT_TEMP(nr - 3);
516 temp = lut_temp_to_reg(data, val);
517 }
518 data->temp8[nr] = temp;
519 i2c_smbus_write_byte_data(client, reg, temp);
520 mutex_unlock(&data->update_lock);
521 return count;
522}
523
524static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
525 char *buf)
526{
527 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
528 struct lm63_data *data = lm63_update_device(dev);
529 int nr = attr->index;
530 int temp;
531
532 if (!nr) {
533 /*
534 * Use unsigned temperature unless its value is zero.
535 * If it is zero, use signed temperature.
536 */
537 if (data->temp11u)
538 temp = TEMP11_FROM_REG(data->temp11u);
539 else
540 temp = TEMP11_FROM_REG(data->temp11[nr]);
541 } else {
542 if (data->remote_unsigned && nr == 2)
543 temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
544 else
545 temp = TEMP11_FROM_REG(data->temp11[nr]);
546 }
547 return sprintf(buf, "%d\n", temp + data->temp2_offset);
548}
549
550static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
551 const char *buf, size_t count)
552{
553 static const u8 reg[6] = {
554 LM63_REG_REMOTE_LOW_MSB,
555 LM63_REG_REMOTE_LOW_LSB,
556 LM63_REG_REMOTE_HIGH_MSB,
557 LM63_REG_REMOTE_HIGH_LSB,
558 LM63_REG_REMOTE_OFFSET_MSB,
559 LM63_REG_REMOTE_OFFSET_LSB,
560 };
561
562 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
563 struct lm63_data *data = dev_get_drvdata(dev);
564 struct i2c_client *client = data->client;
565 long val;
566 int err;
567 int nr = attr->index;
568
569 err = kstrtol(buf, 10, &val);
570 if (err)
571 return err;
572
573 mutex_lock(&data->update_lock);
574 if (data->remote_unsigned && nr == 2)
575 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
576 else
577 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
578
579 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
580 data->temp11[nr] >> 8);
581 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
582 data->temp11[nr] & 0xff);
583 mutex_unlock(&data->update_lock);
584 return count;
585}
586
587/*
588 * Hysteresis register holds a relative value, while we want to present
589 * an absolute to user-space
590 */
591static ssize_t temp2_crit_hyst_show(struct device *dev,
592 struct device_attribute *dummy, char *buf)
593{
594 struct lm63_data *data = lm63_update_device(dev);
595 return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
596 + data->temp2_offset
597 - TEMP8_FROM_REG(data->temp2_crit_hyst));
598}
599
600static ssize_t show_lut_temp_hyst(struct device *dev,
601 struct device_attribute *devattr, char *buf)
602{
603 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
604 struct lm63_data *data = lm63_update_device(dev);
605
606 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
607 + data->temp2_offset
608 - TEMP8_FROM_REG(data->lut_temp_hyst));
609}
610
611/*
612 * And now the other way around, user-space provides an absolute
613 * hysteresis value and we have to store a relative one
614 */
615static ssize_t temp2_crit_hyst_store(struct device *dev,
616 struct device_attribute *dummy,
617 const char *buf, size_t count)
618{
619 struct lm63_data *data = dev_get_drvdata(dev);
620 struct i2c_client *client = data->client;
621 long val;
622 int err;
623 long hyst;
624
625 err = kstrtol(buf, 10, &val);
626 if (err)
627 return err;
628
629 mutex_lock(&data->update_lock);
630 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
631 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
632 HYST_TO_REG(hyst));
633 mutex_unlock(&data->update_lock);
634 return count;
635}
636
637/*
638 * Set conversion rate.
639 * client->update_lock must be held when calling this function.
640 */
641static void lm63_set_convrate(struct lm63_data *data, unsigned int interval)
642{
643 struct i2c_client *client = data->client;
644 unsigned int update_interval;
645 int i;
646
647 /* Shift calculations to avoid rounding errors */
648 interval <<= 6;
649
650 /* find the nearest update rate */
651 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
652 / data->max_convrate_hz;
653 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
654 if (interval >= update_interval * 3 / 4)
655 break;
656
657 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
658 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
659}
660
661static ssize_t update_interval_show(struct device *dev,
662 struct device_attribute *attr, char *buf)
663{
664 struct lm63_data *data = dev_get_drvdata(dev);
665
666 return sprintf(buf, "%u\n", data->update_interval);
667}
668
669static ssize_t update_interval_store(struct device *dev,
670 struct device_attribute *attr,
671 const char *buf, size_t count)
672{
673 struct lm63_data *data = dev_get_drvdata(dev);
674 unsigned long val;
675 int err;
676
677 err = kstrtoul(buf, 10, &val);
678 if (err)
679 return err;
680
681 mutex_lock(&data->update_lock);
682 lm63_set_convrate(data, clamp_val(val, 0, 100000));
683 mutex_unlock(&data->update_lock);
684
685 return count;
686}
687
688static ssize_t temp2_type_show(struct device *dev,
689 struct device_attribute *attr, char *buf)
690{
691 struct lm63_data *data = dev_get_drvdata(dev);
692
693 return sprintf(buf, data->trutherm ? "1\n" : "2\n");
694}
695
696static ssize_t temp2_type_store(struct device *dev,
697 struct device_attribute *attr,
698 const char *buf, size_t count)
699{
700 struct lm63_data *data = dev_get_drvdata(dev);
701 struct i2c_client *client = data->client;
702 unsigned long val;
703 int ret;
704 u8 reg;
705
706 ret = kstrtoul(buf, 10, &val);
707 if (ret < 0)
708 return ret;
709 if (val != 1 && val != 2)
710 return -EINVAL;
711
712 mutex_lock(&data->update_lock);
713 data->trutherm = val == 1;
714 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
715 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
716 reg | (data->trutherm ? 0x02 : 0x00));
717 data->valid = false;
718 mutex_unlock(&data->update_lock);
719
720 return count;
721}
722
723static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy,
724 char *buf)
725{
726 struct lm63_data *data = lm63_update_device(dev);
727 return sprintf(buf, "%u\n", data->alarms);
728}
729
730static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
731 char *buf)
732{
733 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
734 struct lm63_data *data = lm63_update_device(dev);
735 int bitnr = attr->index;
736
737 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
738}
739
740static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
741static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
742 set_fan, 1);
743
744static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
745static DEVICE_ATTR_RW(pwm1_enable);
746static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
747 show_pwm1, set_pwm1, 1);
748static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
749 show_lut_temp, set_temp8, 3);
750static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
751 show_lut_temp_hyst, NULL, 3);
752static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
753 show_pwm1, set_pwm1, 2);
754static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
755 show_lut_temp, set_temp8, 4);
756static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
757 show_lut_temp_hyst, NULL, 4);
758static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
759 show_pwm1, set_pwm1, 3);
760static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
761 show_lut_temp, set_temp8, 5);
762static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
763 show_lut_temp_hyst, NULL, 5);
764static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
765 show_pwm1, set_pwm1, 4);
766static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
767 show_lut_temp, set_temp8, 6);
768static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
769 show_lut_temp_hyst, NULL, 6);
770static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
771 show_pwm1, set_pwm1, 5);
772static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
773 show_lut_temp, set_temp8, 7);
774static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
775 show_lut_temp_hyst, NULL, 7);
776static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
777 show_pwm1, set_pwm1, 6);
778static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
779 show_lut_temp, set_temp8, 8);
780static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
781 show_lut_temp_hyst, NULL, 8);
782static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
783 show_pwm1, set_pwm1, 7);
784static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
785 show_lut_temp, set_temp8, 9);
786static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
787 show_lut_temp_hyst, NULL, 9);
788static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
789 show_pwm1, set_pwm1, 8);
790static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
791 show_lut_temp, set_temp8, 10);
792static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
793 show_lut_temp_hyst, NULL, 10);
794static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
795 show_pwm1, set_pwm1, 9);
796static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
797 show_lut_temp, set_temp8, 11);
798static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
799 show_lut_temp_hyst, NULL, 11);
800static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
801 show_pwm1, set_pwm1, 10);
802static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
803 show_lut_temp, set_temp8, 12);
804static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
805 show_lut_temp_hyst, NULL, 12);
806static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
807 show_pwm1, set_pwm1, 11);
808static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
809 show_lut_temp, set_temp8, 13);
810static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
811 show_lut_temp_hyst, NULL, 13);
812static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
813 show_pwm1, set_pwm1, 12);
814static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
815 show_lut_temp, set_temp8, 14);
816static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
817 show_lut_temp_hyst, NULL, 14);
818
819static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
820static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
821 set_temp8, 1);
822
823static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
824static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
825 set_temp11, 1);
826static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
827 set_temp11, 2);
828static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
829 set_temp11, 3);
830static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
831 set_temp8, 2);
832static DEVICE_ATTR_RW(temp2_crit_hyst);
833
834static DEVICE_ATTR_RW(temp2_type);
835
836/* Individual alarm files */
837static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
838static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
839static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
840static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
841static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
842static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
843/* Raw alarm file for compatibility */
844static DEVICE_ATTR_RO(alarms);
845
846static DEVICE_ATTR_RW(update_interval);
847
848static struct attribute *lm63_attributes[] = {
849 &sensor_dev_attr_pwm1.dev_attr.attr,
850 &dev_attr_pwm1_enable.attr,
851 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
852 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
853 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
854 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
855 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
856 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
857 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
858 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
859 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
860 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
861 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
862 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
863 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
864 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
865 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
866 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
867 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
868 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
869 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
870 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
871 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
872 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
873 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
874 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
875
876 &sensor_dev_attr_temp1_input.dev_attr.attr,
877 &sensor_dev_attr_temp2_input.dev_attr.attr,
878 &sensor_dev_attr_temp2_min.dev_attr.attr,
879 &sensor_dev_attr_temp1_max.dev_attr.attr,
880 &sensor_dev_attr_temp2_max.dev_attr.attr,
881 &sensor_dev_attr_temp2_offset.dev_attr.attr,
882 &sensor_dev_attr_temp2_crit.dev_attr.attr,
883 &dev_attr_temp2_crit_hyst.attr,
884
885 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
886 &sensor_dev_attr_temp2_fault.dev_attr.attr,
887 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
888 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
889 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
890 &dev_attr_alarms.attr,
891 &dev_attr_update_interval.attr,
892 NULL
893};
894
895static struct attribute *lm63_attributes_temp2_type[] = {
896 &dev_attr_temp2_type.attr,
897 NULL
898};
899
900static const struct attribute_group lm63_group_temp2_type = {
901 .attrs = lm63_attributes_temp2_type,
902};
903
904static struct attribute *lm63_attributes_extra_lut[] = {
905 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
906 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
907 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
908 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
909 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
910 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
911 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
912 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
913 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
914 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
915 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
916 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
917 NULL
918};
919
920static const struct attribute_group lm63_group_extra_lut = {
921 .attrs = lm63_attributes_extra_lut,
922};
923
924/*
925 * On LM63, temp2_crit can be set only once, which should be job
926 * of the bootloader.
927 * On LM64, temp2_crit can always be set.
928 * On LM96163, temp2_crit can be set if bit 1 of the configuration
929 * register is true.
930 */
931static umode_t lm63_attribute_mode(struct kobject *kobj,
932 struct attribute *attr, int index)
933{
934 struct device *dev = kobj_to_dev(kobj);
935 struct lm63_data *data = dev_get_drvdata(dev);
936
937 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
938 && (data->kind == lm64 ||
939 (data->kind == lm96163 && (data->config & 0x02))))
940 return attr->mode | S_IWUSR;
941
942 return attr->mode;
943}
944
945static const struct attribute_group lm63_group = {
946 .is_visible = lm63_attribute_mode,
947 .attrs = lm63_attributes,
948};
949
950static struct attribute *lm63_attributes_fan1[] = {
951 &sensor_dev_attr_fan1_input.dev_attr.attr,
952 &sensor_dev_attr_fan1_min.dev_attr.attr,
953
954 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
955 NULL
956};
957
958static const struct attribute_group lm63_group_fan1 = {
959 .attrs = lm63_attributes_fan1,
960};
961
962/*
963 * Real code
964 */
965
966/* Return 0 if detection is successful, -ENODEV otherwise */
967static int lm63_detect(struct i2c_client *client,
968 struct i2c_board_info *info)
969{
970 struct i2c_adapter *adapter = client->adapter;
971 u8 man_id, chip_id, reg_config1, reg_config2;
972 u8 reg_alert_status, reg_alert_mask;
973 int address = client->addr;
974
975 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
976 return -ENODEV;
977
978 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
979 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
980
981 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
982 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
983 reg_alert_status = i2c_smbus_read_byte_data(client,
984 LM63_REG_ALERT_STATUS);
985 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
986
987 if (man_id != 0x01 /* National Semiconductor */
988 || (reg_config1 & 0x18) != 0x00
989 || (reg_config2 & 0xF8) != 0x00
990 || (reg_alert_status & 0x20) != 0x00
991 || (reg_alert_mask & 0xA4) != 0xA4) {
992 dev_dbg(&adapter->dev,
993 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
994 man_id, chip_id);
995 return -ENODEV;
996 }
997
998 if (chip_id == 0x41 && address == 0x4c)
999 strscpy(info->type, "lm63", I2C_NAME_SIZE);
1000 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1001 strscpy(info->type, "lm64", I2C_NAME_SIZE);
1002 else if (chip_id == 0x49 && address == 0x4c)
1003 strscpy(info->type, "lm96163", I2C_NAME_SIZE);
1004 else
1005 return -ENODEV;
1006
1007 return 0;
1008}
1009
1010/*
1011 * Ideally we shouldn't have to initialize anything, since the BIOS
1012 * should have taken care of everything
1013 */
1014static void lm63_init_client(struct lm63_data *data)
1015{
1016 struct i2c_client *client = data->client;
1017 struct device *dev = &client->dev;
1018 u8 convrate;
1019
1020 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1021 data->config_fan = i2c_smbus_read_byte_data(client,
1022 LM63_REG_CONFIG_FAN);
1023
1024 /* Start converting if needed */
1025 if (data->config & 0x40) { /* standby */
1026 dev_dbg(dev, "Switching to operational mode\n");
1027 data->config &= 0xA7;
1028 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
1029 data->config);
1030 }
1031 /* Tachometer is always enabled on LM64 */
1032 if (data->kind == lm64)
1033 data->config |= 0x04;
1034
1035 /* We may need pwm1_freq before ever updating the client data */
1036 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
1037 if (data->pwm1_freq == 0)
1038 data->pwm1_freq = 1;
1039
1040 switch (data->kind) {
1041 case lm63:
1042 case lm64:
1043 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
1044 data->lut_size = 8;
1045 break;
1046 case lm96163:
1047 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
1048 data->lut_size = 12;
1049 data->trutherm
1050 = i2c_smbus_read_byte_data(client,
1051 LM96163_REG_TRUTHERM) & 0x02;
1052 break;
1053 }
1054 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
1055 if (unlikely(convrate > LM63_MAX_CONVRATE))
1056 convrate = LM63_MAX_CONVRATE;
1057 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
1058 convrate);
1059
1060 /*
1061 * For LM96163, check if high resolution PWM
1062 * and unsigned temperature format is enabled.
1063 */
1064 if (data->kind == lm96163) {
1065 u8 config_enhanced
1066 = i2c_smbus_read_byte_data(client,
1067 LM96163_REG_CONFIG_ENHANCED);
1068 if (config_enhanced & 0x20)
1069 data->lut_temp_highres = true;
1070 if ((config_enhanced & 0x10)
1071 && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
1072 data->pwm_highres = true;
1073 if (config_enhanced & 0x08)
1074 data->remote_unsigned = true;
1075 }
1076
1077 /* Show some debug info about the LM63 configuration */
1078 if (data->kind == lm63)
1079 dev_dbg(dev, "Alert/tach pin configured for %s\n",
1080 (data->config & 0x04) ? "tachometer input" :
1081 "alert output");
1082 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n",
1083 (data->config_fan & 0x08) ? "1.4" : "360",
1084 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
1085 dev_dbg(dev, "PWM output active %s, %s mode\n",
1086 (data->config_fan & 0x10) ? "low" : "high",
1087 (data->config_fan & 0x20) ? "manual" : "auto");
1088}
1089
1090static const struct i2c_device_id lm63_id[];
1091
1092static int lm63_probe(struct i2c_client *client)
1093{
1094 struct device *dev = &client->dev;
1095 struct device *hwmon_dev;
1096 struct lm63_data *data;
1097 int groups = 0;
1098
1099 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL);
1100 if (!data)
1101 return -ENOMEM;
1102
1103 data->client = client;
1104 mutex_init(&data->update_lock);
1105
1106 /* Set the device type */
1107 if (client->dev.of_node)
1108 data->kind = (uintptr_t)of_device_get_match_data(&client->dev);
1109 else
1110 data->kind = i2c_match_id(lm63_id, client)->driver_data;
1111 if (data->kind == lm64)
1112 data->temp2_offset = 16000;
1113
1114 /* Initialize chip */
1115 lm63_init_client(data);
1116
1117 /* Register sysfs hooks */
1118 data->groups[groups++] = &lm63_group;
1119 if (data->config & 0x04) /* tachometer enabled */
1120 data->groups[groups++] = &lm63_group_fan1;
1121
1122 if (data->kind == lm96163) {
1123 data->groups[groups++] = &lm63_group_temp2_type;
1124 data->groups[groups++] = &lm63_group_extra_lut;
1125 }
1126
1127 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1128 data, data->groups);
1129 return PTR_ERR_OR_ZERO(hwmon_dev);
1130}
1131
1132/*
1133 * Driver data (common to all clients)
1134 */
1135
1136static const struct i2c_device_id lm63_id[] = {
1137 { "lm63", lm63 },
1138 { "lm64", lm64 },
1139 { "lm96163", lm96163 },
1140 { }
1141};
1142MODULE_DEVICE_TABLE(i2c, lm63_id);
1143
1144static const struct of_device_id __maybe_unused lm63_of_match[] = {
1145 {
1146 .compatible = "national,lm63",
1147 .data = (void *)lm63
1148 },
1149 {
1150 .compatible = "national,lm64",
1151 .data = (void *)lm64
1152 },
1153 {
1154 .compatible = "national,lm96163",
1155 .data = (void *)lm96163
1156 },
1157 { },
1158};
1159MODULE_DEVICE_TABLE(of, lm63_of_match);
1160
1161static struct i2c_driver lm63_driver = {
1162 .class = I2C_CLASS_HWMON,
1163 .driver = {
1164 .name = "lm63",
1165 .of_match_table = of_match_ptr(lm63_of_match),
1166 },
1167 .probe = lm63_probe,
1168 .id_table = lm63_id,
1169 .detect = lm63_detect,
1170 .address_list = normal_i2c,
1171};
1172
1173module_i2c_driver(lm63_driver);
1174
1175MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1176MODULE_DESCRIPTION("LM63 driver");
1177MODULE_LICENSE("GPL");