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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
[linux-2.6-block.git] / drivers / hwmon / lm63.c
CommitLineData
1da177e4
LT		 1/*
2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
d5957be2 4 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
1da177e4
LT		 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
1da177e4
LT		 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>
10c08f81 45#include <linux/hwmon-sysfs.h>
943b0830
MH		 46#include <linux/hwmon.h>
47#include <linux/err.h>
9a61bf63 48#include <linux/mutex.h>
0e39e01c 49#include <linux/sysfs.h>
1da177e4
LT		 50
51/*
52 * Addresses to scan
53 * Address is fully defined internally and cannot be changed.
54 */
55
25e9c86d 56static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
1da177e4
LT		 57
58/*
59 * Insmod parameters
60 */
61
f4b50261 62I2C_CLIENT_INSMOD_1(lm63);
1da177e4
LT		 63
64/*
65 * The LM63 registers
66 */
67
68#define LM63_REG_CONFIG1 0x03
69#define LM63_REG_CONFIG2 0xBF
70#define LM63_REG_CONFIG_FAN 0x4A
71
72#define LM63_REG_TACH_COUNT_MSB 0x47
73#define LM63_REG_TACH_COUNT_LSB 0x46
74#define LM63_REG_TACH_LIMIT_MSB 0x49
75#define LM63_REG_TACH_LIMIT_LSB 0x48
76
77#define LM63_REG_PWM_VALUE 0x4C
78#define LM63_REG_PWM_FREQ 0x4D
79
80#define LM63_REG_LOCAL_TEMP 0x00
81#define LM63_REG_LOCAL_HIGH 0x05
82
83#define LM63_REG_REMOTE_TEMP_MSB 0x01
84#define LM63_REG_REMOTE_TEMP_LSB 0x10
85#define LM63_REG_REMOTE_OFFSET_MSB 0x11
86#define LM63_REG_REMOTE_OFFSET_LSB 0x12
87#define LM63_REG_REMOTE_HIGH_MSB 0x07
88#define LM63_REG_REMOTE_HIGH_LSB 0x13
89#define LM63_REG_REMOTE_LOW_MSB 0x08
90#define LM63_REG_REMOTE_LOW_LSB 0x14
91#define LM63_REG_REMOTE_TCRIT 0x19
92#define LM63_REG_REMOTE_TCRIT_HYST 0x21
93
94#define LM63_REG_ALERT_STATUS 0x02
95#define LM63_REG_ALERT_MASK 0x16
96
97#define LM63_REG_MAN_ID 0xFE
98#define LM63_REG_CHIP_ID 0xFF
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
44bbe87e 104 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
1da177e4 105 * For remote temperature, low and high limits, it uses signed 11-bit values
44bbe87e 106 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
1da177e4
LT		 107 */
108
109#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
110 5400000 / (reg))
111#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
112 (5400000 / (val)) & 0xFFFC)
113#define TEMP8_FROM_REG(reg) ((reg) * 1000)
114#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
115 (val) >= 127000 ? 127 : \
116 (val) < 0 ? ((val) - 500) / 1000 : \
117 ((val) + 500) / 1000)
118#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
119#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
120 (val) >= 127875 ? 0x7FE0 : \
121 (val) < 0 ? ((val) - 62) / 125 * 32 : \
122 ((val) + 62) / 125 * 32)
123#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
124 (val) >= 127000 ? 127 : \
125 ((val) + 500) / 1000)
126
127/*
128 * Functions declaration
129 */
130
d5957be2
JD		 131static int lm63_probe(struct i2c_client *client,
132 const struct i2c_device_id *id);
133static int lm63_remove(struct i2c_client *client);
1da177e4
LT		 134
135static struct lm63_data *lm63_update_device(struct device *dev);
136
d5957be2
JD		 137static int lm63_detect(struct i2c_client *client, int kind,
138 struct i2c_board_info *info);
1da177e4
LT		 139static void lm63_init_client(struct i2c_client *client);
140
141/*
142 * Driver data (common to all clients)
143 */
144
d5957be2
JD		 145static const struct i2c_device_id lm63_id[] = {
146 { "lm63", lm63 },
147 { }
148};
149MODULE_DEVICE_TABLE(i2c, lm63_id);
150
1da177e4 151static struct i2c_driver lm63_driver = {
d5957be2 152 .class = I2C_CLASS_HWMON,
cdaf7934 153 .driver = {
cdaf7934
LR		 154 .name = "lm63",
155 },
d5957be2
JD		 156 .probe = lm63_probe,
157 .remove = lm63_remove,
158 .id_table = lm63_id,
159 .detect = lm63_detect,
160 .address_data = &addr_data,
1da177e4
LT		 161};
162
163/*
164 * Client data (each client gets its own)
165 */
166
167struct lm63_data {
1beeffe4 168 struct device *hwmon_dev;
9a61bf63 169 struct mutex update_lock;
1da177e4
LT		 170 char valid; /* zero until following fields are valid */
171 unsigned long last_updated; /* in jiffies */
172
173 /* registers values */
174 u8 config, config_fan;
bc51ae11
JD		 175 u16 fan[2]; /* 0: input
176 1: low limit */
1da177e4
LT		 177 u8 pwm1_freq;
178 u8 pwm1_value;
bc51ae11
JD		 179 s8 temp8[3]; /* 0: local input
180 1: local high limit
181 2: remote critical limit */
182 s16 temp11[3]; /* 0: remote input
183 1: remote low limit
184 2: remote high limit */
1da177e4
LT		 185 u8 temp2_crit_hyst;
186 u8 alarms;
187};
188
189/*
190 * Sysfs callback functions and files
191 */
192
bc51ae11
JD		 193static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
194 char *buf)
195{
196 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
197 struct lm63_data *data = lm63_update_device(dev);
198 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
1da177e4 199}
1da177e4 200
bc51ae11
JD		 201static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
202 const char *buf, size_t count)
1da177e4
LT		 203{
204 struct i2c_client *client = to_i2c_client(dev);
205 struct lm63_data *data = i2c_get_clientdata(client);
206 unsigned long val = simple_strtoul(buf, NULL, 10);
207
9a61bf63 208 mutex_lock(&data->update_lock);
bc51ae11 209 data->fan[1] = FAN_TO_REG(val);
1da177e4 210 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
bc51ae11 211 data->fan[1] & 0xFF);
1da177e4 212 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
bc51ae11 213 data->fan[1] >> 8);
9a61bf63 214 mutex_unlock(&data->update_lock);
1da177e4
LT		 215 return count;
216}
217
bc51ae11
JD		 218static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
219 char *buf)
1da177e4
LT		 220{
221 struct lm63_data *data = lm63_update_device(dev);
222 return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
223 255 : (data->pwm1_value * 255 + data->pwm1_freq) /
224 (2 * data->pwm1_freq));
225}
226
bc51ae11
JD		 227static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
228 const char *buf, size_t count)
1da177e4
LT		 229{
230 struct i2c_client *client = to_i2c_client(dev);
231 struct lm63_data *data = i2c_get_clientdata(client);
232 unsigned long val;
233
234 if (!(data->config_fan & 0x20)) /* register is read-only */
235 return -EPERM;
236
237 val = simple_strtoul(buf, NULL, 10);
9a61bf63 238 mutex_lock(&data->update_lock);
1da177e4
LT		 239 data->pwm1_value = val <= 0 ? 0 :
240 val >= 255 ? 2 * data->pwm1_freq :
241 (val * data->pwm1_freq * 2 + 127) / 255;
242 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
9a61bf63 243 mutex_unlock(&data->update_lock);
1da177e4
LT		 244 return count;
245}
246
bc51ae11
JD		 247static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
248 char *buf)
1da177e4
LT		 249{
250 struct lm63_data *data = lm63_update_device(dev);
251 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
252}
253
bc51ae11
JD		 254static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
255 char *buf)
256{
257 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
258 struct lm63_data *data = lm63_update_device(dev);
259 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
1da177e4 260}
bc51ae11
JD		 261
262static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
263 const char *buf, size_t count)
264{
265 struct i2c_client *client = to_i2c_client(dev);
266 struct lm63_data *data = i2c_get_clientdata(client);
267 long val = simple_strtol(buf, NULL, 10);
268
9a61bf63 269 mutex_lock(&data->update_lock);
bc51ae11
JD		 270 data->temp8[1] = TEMP8_TO_REG(val);
271 i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
9a61bf63 272 mutex_unlock(&data->update_lock);
bc51ae11 273 return count;
1da177e4 274}
bc51ae11
JD		 275
276static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
277 char *buf)
278{
279 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
280 struct lm63_data *data = lm63_update_device(dev);
281 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
1da177e4 282}
bc51ae11
JD		 283
284static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
285 const char *buf, size_t count)
286{
287 static const u8 reg[4] = {
288 LM63_REG_REMOTE_LOW_MSB,
289 LM63_REG_REMOTE_LOW_LSB,
290 LM63_REG_REMOTE_HIGH_MSB,
291 LM63_REG_REMOTE_HIGH_LSB,
292 };
293
294 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
295 struct i2c_client *client = to_i2c_client(dev);
296 struct lm63_data *data = i2c_get_clientdata(client);
297 long val = simple_strtol(buf, NULL, 10);
298 int nr = attr->index;
299
9a61bf63 300 mutex_lock(&data->update_lock);
bc51ae11
JD		 301 data->temp11[nr] = TEMP11_TO_REG(val);
302 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
303 data->temp11[nr] >> 8);
304 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
305 data->temp11[nr] & 0xff);
9a61bf63 306 mutex_unlock(&data->update_lock);
bc51ae11 307 return count;
1da177e4 308}
1da177e4
LT		 309
310/* Hysteresis register holds a relative value, while we want to present
311 an absolute to user-space */
bc51ae11
JD		 312static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
313 char *buf)
1da177e4
LT		 314{
315 struct lm63_data *data = lm63_update_device(dev);
bc51ae11 316 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
1da177e4
LT		 317 - TEMP8_FROM_REG(data->temp2_crit_hyst));
318}
319
320/* And now the other way around, user-space provides an absolute
321 hysteresis value and we have to store a relative one */
bc51ae11
JD		 322static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
323 const char *buf, size_t count)
1da177e4
LT		 324{
325 struct i2c_client *client = to_i2c_client(dev);
326 struct lm63_data *data = i2c_get_clientdata(client);
327 long val = simple_strtol(buf, NULL, 10);
328 long hyst;
329
9a61bf63 330 mutex_lock(&data->update_lock);
bc51ae11 331 hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
1da177e4
LT		 332 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
333 HYST_TO_REG(hyst));
9a61bf63 334 mutex_unlock(&data->update_lock);
1da177e4
LT		 335 return count;
336}
337
bc51ae11
JD		 338static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
339 char *buf)
1da177e4
LT		 340{
341 struct lm63_data *data = lm63_update_device(dev);
342 return sprintf(buf, "%u\n", data->alarms);
343}
344
2d45771e
JD		 345static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
346 char *buf)
347{
348 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
349 struct lm63_data *data = lm63_update_device(dev);
350 int bitnr = attr->index;
351
352 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
353}
354
bc51ae11
JD		 355static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
356static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
357 set_fan, 1);
1da177e4
LT		 358
359static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
360static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
361
bc51ae11
JD		 362static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
363static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
364 set_temp8, 1);
1da177e4 365
bc51ae11
JD		 366static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
367static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
368 set_temp11, 1);
369static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
370 set_temp11, 2);
371static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
1da177e4
LT		 372static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
373 set_temp2_crit_hyst);
374
2d45771e
JD		 375/* Individual alarm files */
376static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
377static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
7817a39e 378static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
2d45771e
JD		 379static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
380static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
381static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
382/* Raw alarm file for compatibility */
1da177e4
LT		 383static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
384
0e39e01c
JD		 385static struct attribute *lm63_attributes[] = {
386 &dev_attr_pwm1.attr,
387 &dev_attr_pwm1_enable.attr,
388 &sensor_dev_attr_temp1_input.dev_attr.attr,
389 &sensor_dev_attr_temp2_input.dev_attr.attr,
390 &sensor_dev_attr_temp2_min.dev_attr.attr,
391 &sensor_dev_attr_temp1_max.dev_attr.attr,
392 &sensor_dev_attr_temp2_max.dev_attr.attr,
393 &sensor_dev_attr_temp2_crit.dev_attr.attr,
394 &dev_attr_temp2_crit_hyst.attr,
395
396 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
7817a39e 397 &sensor_dev_attr_temp2_fault.dev_attr.attr,
0e39e01c
JD		 398 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
399 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
400 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
401 &dev_attr_alarms.attr,
402 NULL
403};
404
405static const struct attribute_group lm63_group = {
406 .attrs = lm63_attributes,
407};
408
409static struct attribute *lm63_attributes_fan1[] = {
410 &sensor_dev_attr_fan1_input.dev_attr.attr,
411 &sensor_dev_attr_fan1_min.dev_attr.attr,
412
413 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
414 NULL
415};
416
417static const struct attribute_group lm63_group_fan1 = {
418 .attrs = lm63_attributes_fan1,
419};
420
1da177e4
LT		 421/*
422 * Real code
423 */
424
d5957be2
JD		 425/* Return 0 if detection is successful, -ENODEV otherwise */
426static int lm63_detect(struct i2c_client *new_client, int kind,
427 struct i2c_board_info *info)
1da177e4 428{
d5957be2 429 struct i2c_adapter *adapter = new_client->adapter;
1da177e4
LT		 430
431 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
d5957be2 432 return -ENODEV;
1da177e4
LT		 433
434 if (kind < 0) { /* must identify */
435 u8 man_id, chip_id, reg_config1, reg_config2;
436 u8 reg_alert_status, reg_alert_mask;
437
438 man_id = i2c_smbus_read_byte_data(new_client,
439 LM63_REG_MAN_ID);
440 chip_id = i2c_smbus_read_byte_data(new_client,
441 LM63_REG_CHIP_ID);
442 reg_config1 = i2c_smbus_read_byte_data(new_client,
443 LM63_REG_CONFIG1);
444 reg_config2 = i2c_smbus_read_byte_data(new_client,
445 LM63_REG_CONFIG2);
446 reg_alert_status = i2c_smbus_read_byte_data(new_client,
447 LM63_REG_ALERT_STATUS);
448 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
449 LM63_REG_ALERT_MASK);
450
451 if (man_id == 0x01 /* National Semiconductor */
452 && chip_id == 0x41 /* LM63 */
453 && (reg_config1 & 0x18) == 0x00
454 && (reg_config2 & 0xF8) == 0x00
455 && (reg_alert_status & 0x20) == 0x00
456 && (reg_alert_mask & 0xA4) == 0xA4) {
457 kind = lm63;
458 } else { /* failed */
459 dev_dbg(&adapter->dev, "Unsupported chip "
460 "(man_id=0x%02X, chip_id=0x%02X).\n",
461 man_id, chip_id);
d5957be2 462 return -ENODEV;
1da177e4
LT		 463 }
464 }
465
d5957be2
JD		 466 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
467
468 return 0;
469}
470
471static int lm63_probe(struct i2c_client *new_client,
472 const struct i2c_device_id *id)
473{
474 struct lm63_data *data;
475 int err;
476
477 data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
478 if (!data) {
479 err = -ENOMEM;
480 goto exit;
481 }
482
483 i2c_set_clientdata(new_client, data);
1da177e4 484 data->valid = 0;
9a61bf63 485 mutex_init(&data->update_lock);
1da177e4 486
1da177e4
LT		 487 /* Initialize the LM63 chip */
488 lm63_init_client(new_client);
489
490 /* Register sysfs hooks */
0e39e01c
JD		 491 if ((err = sysfs_create_group(&new_client->dev.kobj,
492 &lm63_group)))
d5957be2 493 goto exit_free;
0e39e01c
JD		 494 if (data->config & 0x04) { /* tachometer enabled */
495 if ((err = sysfs_create_group(&new_client->dev.kobj,
496 &lm63_group_fan1)))
497 goto exit_remove_files;
943b0830
MH		 498 }
499
1beeffe4
TJ		 500 data->hwmon_dev = hwmon_device_register(&new_client->dev);
501 if (IS_ERR(data->hwmon_dev)) {
502 err = PTR_ERR(data->hwmon_dev);
0e39e01c 503 goto exit_remove_files;
1da177e4 504 }
1da177e4
LT		 505
506 return 0;
507
0e39e01c
JD		 508exit_remove_files:
509 sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
510 sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
1da177e4
LT		 511exit_free:
512 kfree(data);
513exit:
514 return err;
515}
516
517/* Idealy we shouldn't have to initialize anything, since the BIOS
518 should have taken care of everything */
519static void lm63_init_client(struct i2c_client *client)
520{
521 struct lm63_data *data = i2c_get_clientdata(client);
522
523 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
524 data->config_fan = i2c_smbus_read_byte_data(client,
525 LM63_REG_CONFIG_FAN);
526
527 /* Start converting if needed */
528 if (data->config & 0x40) { /* standby */
898eb71c 529 dev_dbg(&client->dev, "Switching to operational mode\n");
1da177e4
LT		 530 data->config &= 0xA7;
531 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
532 data->config);
533 }
534
535 /* We may need pwm1_freq before ever updating the client data */
536 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
537 if (data->pwm1_freq == 0)
538 data->pwm1_freq = 1;
539
540 /* Show some debug info about the LM63 configuration */
541 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
542 (data->config & 0x04) ? "tachometer input" :
543 "alert output");
544 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
545 (data->config_fan & 0x08) ? "1.4" : "360",
546 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
547 dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
548 (data->config_fan & 0x10) ? "low" : "high",
549 (data->config_fan & 0x20) ? "manual" : "auto");
550}
551
d5957be2 552static int lm63_remove(struct i2c_client *client)
1da177e4 553{
943b0830 554 struct lm63_data *data = i2c_get_clientdata(client);
1da177e4 555
1beeffe4 556 hwmon_device_unregister(data->hwmon_dev);
0e39e01c
JD		 557 sysfs_remove_group(&client->dev.kobj, &lm63_group);
558 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
943b0830 559
943b0830 560 kfree(data);
1da177e4
LT		 561 return 0;
562}
563
564static struct lm63_data *lm63_update_device(struct device *dev)
565{
566 struct i2c_client *client = to_i2c_client(dev);
567 struct lm63_data *data = i2c_get_clientdata(client);
568
9a61bf63 569 mutex_lock(&data->update_lock);
1da177e4
LT		 570
571 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
572 if (data->config & 0x04) { /* tachometer enabled */
573 /* order matters for fan1_input */
bc51ae11
JD		 574 data->fan[0] = i2c_smbus_read_byte_data(client,
575 LM63_REG_TACH_COUNT_LSB) & 0xFC;
576 data->fan[0] |= i2c_smbus_read_byte_data(client,
577 LM63_REG_TACH_COUNT_MSB) << 8;
578 data->fan[1] = (i2c_smbus_read_byte_data(client,
579 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
580 | (i2c_smbus_read_byte_data(client,
581 LM63_REG_TACH_LIMIT_MSB) << 8);
1da177e4
LT		 582 }
583
584 data->pwm1_freq = i2c_smbus_read_byte_data(client,
585 LM63_REG_PWM_FREQ);
586 if (data->pwm1_freq == 0)
587 data->pwm1_freq = 1;
588 data->pwm1_value = i2c_smbus_read_byte_data(client,
589 LM63_REG_PWM_VALUE);
590
bc51ae11
JD		 591 data->temp8[0] = i2c_smbus_read_byte_data(client,
592 LM63_REG_LOCAL_TEMP);
593 data->temp8[1] = i2c_smbus_read_byte_data(client,
594 LM63_REG_LOCAL_HIGH);
1da177e4
LT		 595
596 /* order matters for temp2_input */
bc51ae11
JD		 597 data->temp11[0] = i2c_smbus_read_byte_data(client,
598 LM63_REG_REMOTE_TEMP_MSB) << 8;
599 data->temp11[0] |= i2c_smbus_read_byte_data(client,
600 LM63_REG_REMOTE_TEMP_LSB);
601 data->temp11[1] = (i2c_smbus_read_byte_data(client,
1da177e4
LT		 602 LM63_REG_REMOTE_LOW_MSB) << 8)
603 | i2c_smbus_read_byte_data(client,
604 LM63_REG_REMOTE_LOW_LSB);
bc51ae11
JD		 605 data->temp11[2] = (i2c_smbus_read_byte_data(client,
606 LM63_REG_REMOTE_HIGH_MSB) << 8)
607 | i2c_smbus_read_byte_data(client,
608 LM63_REG_REMOTE_HIGH_LSB);
609 data->temp8[2] = i2c_smbus_read_byte_data(client,
610 LM63_REG_REMOTE_TCRIT);
1da177e4
LT		 611 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
612 LM63_REG_REMOTE_TCRIT_HYST);
613
614 data->alarms = i2c_smbus_read_byte_data(client,
615 LM63_REG_ALERT_STATUS) & 0x7F;
616
617 data->last_updated = jiffies;
618 data->valid = 1;
619 }
620
9a61bf63 621 mutex_unlock(&data->update_lock);
1da177e4
LT		 622
623 return data;
624}
625
626static int __init sensors_lm63_init(void)
627{
628 return i2c_add_driver(&lm63_driver);
629}
630
631static void __exit sensors_lm63_exit(void)
632{
633 i2c_del_driver(&lm63_driver);
634}
635
636MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
637MODULE_DESCRIPTION("LM63 driver");
638MODULE_LICENSE("GPL");
639
640module_init(sensors_lm63_init);
641module_exit(sensors_lm63_exit);
Linux 6.x block layer and io_uring tree(s)