1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
5 * Preliminary tmp411 support by:
6 * Gabriel Konat, Sander Leget, Wouter Willems
7 * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
9 * Cleanup and support for TMP431 and TMP432 by Guenter Roeck
10 * Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
14 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
16 * Note this IC is in some aspect similar to the LM90, but it has quite a
17 * few differences too, for example the local temp has a higher resolution
18 * and thus has 16 bits registers for its value and limit instead of 8 bits.
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/bitops.h>
24 #include <linux/slab.h>
25 #include <linux/jiffies.h>
26 #include <linux/i2c.h>
27 #include <linux/hwmon.h>
28 #include <linux/hwmon-sysfs.h>
29 #include <linux/err.h>
30 #include <linux/mutex.h>
31 #include <linux/sysfs.h>
33 /* Addresses to scan */
34 static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, 0x4d,
35 0x4e, 0x4f, I2C_CLIENT_END };
37 enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 };
40 * The TMP401 registers, note some registers have different addresses for
43 #define TMP401_STATUS 0x02
44 #define TMP401_CONFIG_READ 0x03
45 #define TMP401_CONFIG_WRITE 0x09
46 #define TMP401_CONVERSION_RATE_READ 0x04
47 #define TMP401_CONVERSION_RATE_WRITE 0x0A
48 #define TMP401_TEMP_CRIT_HYST 0x21
49 #define TMP401_MANUFACTURER_ID_REG 0xFE
50 #define TMP401_DEVICE_ID_REG 0xFF
52 static const u8 TMP401_TEMP_MSB_READ[7][2] = {
53 { 0x00, 0x01 }, /* temp */
54 { 0x06, 0x08 }, /* low limit */
55 { 0x05, 0x07 }, /* high limit */
56 { 0x20, 0x19 }, /* therm (crit) limit */
57 { 0x30, 0x34 }, /* lowest */
58 { 0x32, 0x36 }, /* highest */
61 static const u8 TMP401_TEMP_MSB_WRITE[7][2] = {
62 { 0, 0 }, /* temp (unused) */
63 { 0x0C, 0x0E }, /* low limit */
64 { 0x0B, 0x0D }, /* high limit */
65 { 0x20, 0x19 }, /* therm (crit) limit */
66 { 0x30, 0x34 }, /* lowest */
67 { 0x32, 0x36 }, /* highest */
70 static const u8 TMP432_TEMP_MSB_READ[4][3] = {
71 { 0x00, 0x01, 0x23 }, /* temp */
72 { 0x06, 0x08, 0x16 }, /* low limit */
73 { 0x05, 0x07, 0x15 }, /* high limit */
74 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
77 static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
78 { 0, 0, 0 }, /* temp - unused */
79 { 0x0C, 0x0E, 0x16 }, /* low limit */
80 { 0x0B, 0x0D, 0x15 }, /* high limit */
81 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
84 /* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
85 static const u8 TMP432_STATUS_REG[] = {
86 0x1b, 0x36, 0x35, 0x37 };
89 #define TMP401_CONFIG_RANGE BIT(2)
90 #define TMP401_CONFIG_SHUTDOWN BIT(6)
91 #define TMP401_STATUS_LOCAL_CRIT BIT(0)
92 #define TMP401_STATUS_REMOTE_CRIT BIT(1)
93 #define TMP401_STATUS_REMOTE_OPEN BIT(2)
94 #define TMP401_STATUS_REMOTE_LOW BIT(3)
95 #define TMP401_STATUS_REMOTE_HIGH BIT(4)
96 #define TMP401_STATUS_LOCAL_LOW BIT(5)
97 #define TMP401_STATUS_LOCAL_HIGH BIT(6)
99 /* On TMP432, each status has its own register */
100 #define TMP432_STATUS_LOCAL BIT(0)
101 #define TMP432_STATUS_REMOTE1 BIT(1)
102 #define TMP432_STATUS_REMOTE2 BIT(2)
104 /* Manufacturer / Device ID's */
105 #define TMP401_MANUFACTURER_ID 0x55
106 #define TMP401_DEVICE_ID 0x11
107 #define TMP411A_DEVICE_ID 0x12
108 #define TMP411B_DEVICE_ID 0x13
109 #define TMP411C_DEVICE_ID 0x10
110 #define TMP431_DEVICE_ID 0x31
111 #define TMP432_DEVICE_ID 0x32
112 #define TMP435_DEVICE_ID 0x35
115 * Driver data (common to all clients)
118 static const struct i2c_device_id tmp401_id[] = {
119 { "tmp401", tmp401 },
120 { "tmp411", tmp411 },
121 { "tmp431", tmp431 },
122 { "tmp432", tmp432 },
123 { "tmp435", tmp435 },
126 MODULE_DEVICE_TABLE(i2c, tmp401_id);
129 * Client data (each client gets its own)
133 struct i2c_client *client;
134 const struct attribute_group *groups[3];
135 struct mutex update_lock;
136 bool valid; /* false until following fields are valid */
137 unsigned long last_updated; /* in jiffies */
140 unsigned int update_interval; /* in milliseconds */
142 /* register values */
150 * Sysfs attr show / store functions
153 static int tmp401_register_to_temp(u16 reg, u8 config)
157 if (config & TMP401_CONFIG_RANGE)
160 return DIV_ROUND_CLOSEST(temp * 125, 32);
163 static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
165 if (config & TMP401_CONFIG_RANGE) {
166 temp = clamp_val(temp, -64000, 191000);
169 temp = clamp_val(temp, 0, 127000);
171 return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
174 static int tmp401_update_device_reg16(struct i2c_client *client,
175 struct tmp401_data *data)
178 int num_regs = data->kind == tmp411 ? 6 : 4;
179 int num_sensors = data->kind == tmp432 ? 3 : 2;
181 for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
182 for (j = 0; j < num_regs; j++) { /* temp / low / ... */
185 regaddr = data->kind == tmp432 ?
186 TMP432_TEMP_MSB_READ[j][i] :
187 TMP401_TEMP_MSB_READ[j][i];
188 if (j == 3) { /* crit is msb only */
189 val = i2c_smbus_read_byte_data(client, regaddr);
191 val = i2c_smbus_read_word_swapped(client,
197 data->temp[j][i] = j == 3 ? val << 8 : val;
203 static struct tmp401_data *tmp401_update_device(struct device *dev)
205 struct tmp401_data *data = dev_get_drvdata(dev);
206 struct i2c_client *client = data->client;
207 struct tmp401_data *ret = data;
209 unsigned long next_update;
211 mutex_lock(&data->update_lock);
213 next_update = data->last_updated +
214 msecs_to_jiffies(data->update_interval);
215 if (time_after(jiffies, next_update) || !data->valid) {
216 if (data->kind != tmp432) {
218 * The driver uses the TMP432 status format internally.
219 * Convert status to TMP432 format for other chips.
221 val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
227 (val & TMP401_STATUS_REMOTE_OPEN) >> 1;
229 ((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
230 ((val & TMP401_STATUS_LOCAL_LOW) >> 5);
232 ((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
233 ((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
234 data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
235 | TMP401_STATUS_REMOTE_CRIT);
237 for (i = 0; i < ARRAY_SIZE(data->status); i++) {
238 val = i2c_smbus_read_byte_data(client,
239 TMP432_STATUS_REG[i]);
244 data->status[i] = val;
248 val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
254 val = tmp401_update_device_reg16(client, data);
259 val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
264 data->temp_crit_hyst = val;
266 data->last_updated = jiffies;
271 mutex_unlock(&data->update_lock);
275 static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
278 int nr = to_sensor_dev_attr_2(devattr)->nr;
279 int index = to_sensor_dev_attr_2(devattr)->index;
280 struct tmp401_data *data = tmp401_update_device(dev);
283 return PTR_ERR(data);
285 return sprintf(buf, "%d\n",
286 tmp401_register_to_temp(data->temp[nr][index], data->config));
289 static ssize_t temp_crit_hyst_show(struct device *dev,
290 struct device_attribute *devattr,
293 int temp, index = to_sensor_dev_attr(devattr)->index;
294 struct tmp401_data *data = tmp401_update_device(dev);
297 return PTR_ERR(data);
299 mutex_lock(&data->update_lock);
300 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
301 temp -= data->temp_crit_hyst * 1000;
302 mutex_unlock(&data->update_lock);
304 return sprintf(buf, "%d\n", temp);
307 static ssize_t status_show(struct device *dev,
308 struct device_attribute *devattr, char *buf)
310 int nr = to_sensor_dev_attr_2(devattr)->nr;
311 int mask = to_sensor_dev_attr_2(devattr)->index;
312 struct tmp401_data *data = tmp401_update_device(dev);
315 return PTR_ERR(data);
317 return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
320 static ssize_t temp_store(struct device *dev,
321 struct device_attribute *devattr, const char *buf,
324 int nr = to_sensor_dev_attr_2(devattr)->nr;
325 int index = to_sensor_dev_attr_2(devattr)->index;
326 struct tmp401_data *data = dev_get_drvdata(dev);
327 struct i2c_client *client = data->client;
332 if (kstrtol(buf, 10, &val))
335 reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
337 mutex_lock(&data->update_lock);
339 regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
340 : TMP401_TEMP_MSB_WRITE[nr][index];
341 if (nr == 3) { /* crit is msb only */
342 i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
344 /* Hardware expects big endian data --> use _swapped */
345 i2c_smbus_write_word_swapped(client, regaddr, reg);
347 data->temp[nr][index] = reg;
349 mutex_unlock(&data->update_lock);
354 static ssize_t temp_crit_hyst_store(struct device *dev,
355 struct device_attribute *devattr,
356 const char *buf, size_t count)
358 int temp, index = to_sensor_dev_attr(devattr)->index;
359 struct tmp401_data *data = tmp401_update_device(dev);
364 return PTR_ERR(data);
366 if (kstrtol(buf, 10, &val))
369 if (data->config & TMP401_CONFIG_RANGE)
370 val = clamp_val(val, -64000, 191000);
372 val = clamp_val(val, 0, 127000);
374 mutex_lock(&data->update_lock);
375 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
376 val = clamp_val(val, temp - 255000, temp);
377 reg = ((temp - val) + 500) / 1000;
379 i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
382 data->temp_crit_hyst = reg;
384 mutex_unlock(&data->update_lock);
390 * Resets the historical measurements of minimum and maximum temperatures.
391 * This is done by writing any value to any of the minimum/maximum registers
394 static ssize_t reset_temp_history_store(struct device *dev,
395 struct device_attribute *devattr,
396 const char *buf, size_t count)
398 struct tmp401_data *data = dev_get_drvdata(dev);
399 struct i2c_client *client = data->client;
402 if (kstrtol(buf, 10, &val))
407 "temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
411 mutex_lock(&data->update_lock);
412 i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
414 mutex_unlock(&data->update_lock);
419 static ssize_t update_interval_show(struct device *dev,
420 struct device_attribute *attr, char *buf)
422 struct tmp401_data *data = dev_get_drvdata(dev);
424 return sprintf(buf, "%u\n", data->update_interval);
427 static ssize_t update_interval_store(struct device *dev,
428 struct device_attribute *attr,
429 const char *buf, size_t count)
431 struct tmp401_data *data = dev_get_drvdata(dev);
432 struct i2c_client *client = data->client;
436 err = kstrtoul(buf, 10, &val);
441 * For valid rates, interval can be calculated as
442 * interval = (1 << (7 - rate)) * 125;
443 * Rounded rate is therefore
444 * rate = 7 - __fls(interval * 4 / (125 * 3));
445 * Use clamp_val() to avoid overflows, and to ensure valid input
448 val = clamp_val(val, 125, 16000);
449 rate = 7 - __fls(val * 4 / (125 * 3));
450 mutex_lock(&data->update_lock);
451 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
452 data->update_interval = (1 << (7 - rate)) * 125;
453 mutex_unlock(&data->update_lock);
458 static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, 0, 0);
459 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 1, 0);
460 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 2, 0);
461 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 3, 0);
462 static SENSOR_DEVICE_ATTR_RW(temp1_crit_hyst, temp_crit_hyst, 0);
463 static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, status, 1,
464 TMP432_STATUS_LOCAL);
465 static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, status, 2,
466 TMP432_STATUS_LOCAL);
467 static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, status, 3,
468 TMP432_STATUS_LOCAL);
469 static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, 0, 1);
470 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 1, 1);
471 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 2, 1);
472 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 3, 1);
473 static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, temp_crit_hyst, 1);
474 static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, status, 0, TMP432_STATUS_REMOTE1);
475 static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, status, 1,
476 TMP432_STATUS_REMOTE1);
477 static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, status, 2,
478 TMP432_STATUS_REMOTE1);
479 static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, status, 3,
480 TMP432_STATUS_REMOTE1);
482 static DEVICE_ATTR_RW(update_interval);
484 static struct attribute *tmp401_attributes[] = {
485 &sensor_dev_attr_temp1_input.dev_attr.attr,
486 &sensor_dev_attr_temp1_min.dev_attr.attr,
487 &sensor_dev_attr_temp1_max.dev_attr.attr,
488 &sensor_dev_attr_temp1_crit.dev_attr.attr,
489 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
490 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
491 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
492 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
494 &sensor_dev_attr_temp2_input.dev_attr.attr,
495 &sensor_dev_attr_temp2_min.dev_attr.attr,
496 &sensor_dev_attr_temp2_max.dev_attr.attr,
497 &sensor_dev_attr_temp2_crit.dev_attr.attr,
498 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
499 &sensor_dev_attr_temp2_fault.dev_attr.attr,
500 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
501 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
502 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
504 &dev_attr_update_interval.attr,
509 static const struct attribute_group tmp401_group = {
510 .attrs = tmp401_attributes,
514 * Additional features of the TMP411 chip.
515 * The TMP411 stores the minimum and maximum
516 * temperature measured since power-on, chip-reset, or
517 * minimum and maximum register reset for both the local
518 * and remote channels.
520 static SENSOR_DEVICE_ATTR_2_RO(temp1_lowest, temp, 4, 0);
521 static SENSOR_DEVICE_ATTR_2_RO(temp1_highest, temp, 5, 0);
522 static SENSOR_DEVICE_ATTR_2_RO(temp2_lowest, temp, 4, 1);
523 static SENSOR_DEVICE_ATTR_2_RO(temp2_highest, temp, 5, 1);
524 static SENSOR_DEVICE_ATTR_WO(temp_reset_history, reset_temp_history, 0);
526 static struct attribute *tmp411_attributes[] = {
527 &sensor_dev_attr_temp1_highest.dev_attr.attr,
528 &sensor_dev_attr_temp1_lowest.dev_attr.attr,
529 &sensor_dev_attr_temp2_highest.dev_attr.attr,
530 &sensor_dev_attr_temp2_lowest.dev_attr.attr,
531 &sensor_dev_attr_temp_reset_history.dev_attr.attr,
535 static const struct attribute_group tmp411_group = {
536 .attrs = tmp411_attributes,
539 static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, 0, 2);
540 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 1, 2);
541 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, 2);
542 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 3, 2);
543 static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, temp_crit_hyst, 2);
544 static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, status, 0, TMP432_STATUS_REMOTE2);
545 static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, status, 1,
546 TMP432_STATUS_REMOTE2);
547 static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, status, 2,
548 TMP432_STATUS_REMOTE2);
549 static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, status, 3,
550 TMP432_STATUS_REMOTE2);
552 static struct attribute *tmp432_attributes[] = {
553 &sensor_dev_attr_temp3_input.dev_attr.attr,
554 &sensor_dev_attr_temp3_min.dev_attr.attr,
555 &sensor_dev_attr_temp3_max.dev_attr.attr,
556 &sensor_dev_attr_temp3_crit.dev_attr.attr,
557 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
558 &sensor_dev_attr_temp3_fault.dev_attr.attr,
559 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
560 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
561 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
566 static const struct attribute_group tmp432_group = {
567 .attrs = tmp432_attributes,
571 * Begin non sysfs callback code (aka Real code)
574 static int tmp401_init_client(struct tmp401_data *data,
575 struct i2c_client *client)
577 int config, config_orig, status = 0;
579 /* Set the conversion rate to 2 Hz */
580 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
581 data->update_interval = 500;
583 /* Start conversions (disable shutdown if necessary) */
584 config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
588 config_orig = config;
589 config &= ~TMP401_CONFIG_SHUTDOWN;
591 if (config != config_orig)
592 status = i2c_smbus_write_byte_data(client,
599 static int tmp401_detect(struct i2c_client *client,
600 struct i2c_board_info *info)
603 struct i2c_adapter *adapter = client->adapter;
606 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
609 /* Detect and identify the chip */
610 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
611 if (reg != TMP401_MANUFACTURER_ID)
614 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
617 case TMP401_DEVICE_ID:
618 if (client->addr != 0x4c)
622 case TMP411A_DEVICE_ID:
623 if (client->addr != 0x4c)
627 case TMP411B_DEVICE_ID:
628 if (client->addr != 0x4d)
632 case TMP411C_DEVICE_ID:
633 if (client->addr != 0x4e)
637 case TMP431_DEVICE_ID:
638 if (client->addr != 0x4c && client->addr != 0x4d)
642 case TMP432_DEVICE_ID:
643 if (client->addr != 0x4c && client->addr != 0x4d)
647 case TMP435_DEVICE_ID:
654 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
658 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
659 /* Datasheet says: 0x1-0x6 */
663 strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
668 static int tmp401_probe(struct i2c_client *client)
670 static const char * const names[] = {
671 "TMP401", "TMP411", "TMP431", "TMP432", "TMP435"
673 struct device *dev = &client->dev;
674 struct device *hwmon_dev;
675 struct tmp401_data *data;
676 int groups = 0, status;
678 data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
682 data->client = client;
683 mutex_init(&data->update_lock);
684 data->kind = i2c_match_id(tmp401_id, client)->driver_data;
686 /* Initialize the TMP401 chip */
687 status = tmp401_init_client(data, client);
691 /* Register sysfs hooks */
692 data->groups[groups++] = &tmp401_group;
694 /* Register additional tmp411 sysfs hooks */
695 if (data->kind == tmp411)
696 data->groups[groups++] = &tmp411_group;
698 /* Register additional tmp432 sysfs hooks */
699 if (data->kind == tmp432)
700 data->groups[groups++] = &tmp432_group;
702 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
704 if (IS_ERR(hwmon_dev))
705 return PTR_ERR(hwmon_dev);
707 dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
712 static struct i2c_driver tmp401_driver = {
713 .class = I2C_CLASS_HWMON,
717 .probe_new = tmp401_probe,
718 .id_table = tmp401_id,
719 .detect = tmp401_detect,
720 .address_list = normal_i2c,
723 module_i2c_driver(tmp401_driver);
725 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
726 MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
727 MODULE_LICENSE("GPL");