2 * A driver for the I2C members of the Abracon AB x8xx RTC family,
3 * and compatible: AB 1805 and AB 0805
5 * Copyright 2014-2015 Macq S.A.
7 * Author: Philippe De Muyter <phdm@macqel.be>
8 * Author: Alexandre Belloni <alexandre.belloni@free-electrons.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
16 #include <linux/bcd.h>
17 #include <linux/i2c.h>
18 #include <linux/module.h>
19 #include <linux/rtc.h>
20 #include <linux/watchdog.h>
22 #define ABX8XX_REG_HTH 0x00
23 #define ABX8XX_REG_SC 0x01
24 #define ABX8XX_REG_MN 0x02
25 #define ABX8XX_REG_HR 0x03
26 #define ABX8XX_REG_DA 0x04
27 #define ABX8XX_REG_MO 0x05
28 #define ABX8XX_REG_YR 0x06
29 #define ABX8XX_REG_WD 0x07
31 #define ABX8XX_REG_AHTH 0x08
32 #define ABX8XX_REG_ASC 0x09
33 #define ABX8XX_REG_AMN 0x0a
34 #define ABX8XX_REG_AHR 0x0b
35 #define ABX8XX_REG_ADA 0x0c
36 #define ABX8XX_REG_AMO 0x0d
37 #define ABX8XX_REG_AWD 0x0e
39 #define ABX8XX_REG_STATUS 0x0f
40 #define ABX8XX_STATUS_AF BIT(2)
41 #define ABX8XX_STATUS_BLF BIT(4)
42 #define ABX8XX_STATUS_WDT BIT(6)
44 #define ABX8XX_REG_CTRL1 0x10
45 #define ABX8XX_CTRL_WRITE BIT(0)
46 #define ABX8XX_CTRL_ARST BIT(2)
47 #define ABX8XX_CTRL_12_24 BIT(6)
49 #define ABX8XX_REG_IRQ 0x12
50 #define ABX8XX_IRQ_AIE BIT(2)
51 #define ABX8XX_IRQ_IM_1_4 (0x3 << 5)
53 #define ABX8XX_REG_CD_TIMER_CTL 0x18
55 #define ABX8XX_REG_OSC 0x1c
56 #define ABX8XX_OSC_FOS BIT(3)
57 #define ABX8XX_OSC_BOS BIT(4)
58 #define ABX8XX_OSC_ACAL_512 BIT(5)
59 #define ABX8XX_OSC_ACAL_1024 BIT(6)
61 #define ABX8XX_OSC_OSEL BIT(7)
63 #define ABX8XX_REG_OSS 0x1d
64 #define ABX8XX_OSS_OF BIT(1)
65 #define ABX8XX_OSS_OMODE BIT(4)
67 #define ABX8XX_REG_WDT 0x1b
68 #define ABX8XX_WDT_WDS BIT(7)
69 #define ABX8XX_WDT_BMB_MASK 0x7c
70 #define ABX8XX_WDT_BMB_SHIFT 2
71 #define ABX8XX_WDT_MAX_TIME (ABX8XX_WDT_BMB_MASK >> ABX8XX_WDT_BMB_SHIFT)
72 #define ABX8XX_WDT_WRB_MASK 0x03
73 #define ABX8XX_WDT_WRB_1HZ 0x02
75 #define ABX8XX_REG_CFG_KEY 0x1f
76 #define ABX8XX_CFG_KEY_OSC 0xa1
77 #define ABX8XX_CFG_KEY_MISC 0x9d
79 #define ABX8XX_REG_ID0 0x28
81 #define ABX8XX_REG_TRICKLE 0x20
82 #define ABX8XX_TRICKLE_CHARGE_ENABLE 0xa0
83 #define ABX8XX_TRICKLE_STANDARD_DIODE 0x8
84 #define ABX8XX_TRICKLE_SCHOTTKY_DIODE 0x4
86 static u8 trickle_resistors[] = {0, 3, 6, 11};
88 enum abx80x_chip {AB0801, AB0803, AB0804, AB0805,
89 AB1801, AB1803, AB1804, AB1805, ABX80X};
97 static struct abx80x_cap abx80x_caps[] = {
98 [AB0801] = {.pn = 0x0801},
99 [AB0803] = {.pn = 0x0803},
100 [AB0804] = {.pn = 0x0804, .has_tc = true, .has_wdog = true},
101 [AB0805] = {.pn = 0x0805, .has_tc = true, .has_wdog = true},
102 [AB1801] = {.pn = 0x1801},
103 [AB1803] = {.pn = 0x1803},
104 [AB1804] = {.pn = 0x1804, .has_tc = true, .has_wdog = true},
105 [AB1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true},
110 struct rtc_device *rtc;
111 struct i2c_client *client;
112 struct watchdog_device wdog;
115 static int abx80x_is_rc_mode(struct i2c_client *client)
119 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);
121 dev_err(&client->dev,
122 "Failed to read autocalibration attribute\n");
126 return (flags & ABX8XX_OSS_OMODE) ? 1 : 0;
129 static int abx80x_enable_trickle_charger(struct i2c_client *client,
135 * Write the configuration key register to enable access to the Trickle
138 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,
139 ABX8XX_CFG_KEY_MISC);
141 dev_err(&client->dev, "Unable to write configuration key\n");
145 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_TRICKLE,
146 ABX8XX_TRICKLE_CHARGE_ENABLE |
149 dev_err(&client->dev, "Unable to write trickle register\n");
156 static int abx80x_rtc_read_time(struct device *dev, struct rtc_time *tm)
158 struct i2c_client *client = to_i2c_client(dev);
159 unsigned char buf[8];
160 int err, flags, rc_mode = 0;
162 /* Read the Oscillator Failure only in XT mode */
163 rc_mode = abx80x_is_rc_mode(client);
168 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);
172 if (flags & ABX8XX_OSS_OF) {
173 dev_err(dev, "Oscillator failure, data is invalid.\n");
178 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_HTH,
181 dev_err(&client->dev, "Unable to read date\n");
185 tm->tm_sec = bcd2bin(buf[ABX8XX_REG_SC] & 0x7F);
186 tm->tm_min = bcd2bin(buf[ABX8XX_REG_MN] & 0x7F);
187 tm->tm_hour = bcd2bin(buf[ABX8XX_REG_HR] & 0x3F);
188 tm->tm_wday = buf[ABX8XX_REG_WD] & 0x7;
189 tm->tm_mday = bcd2bin(buf[ABX8XX_REG_DA] & 0x3F);
190 tm->tm_mon = bcd2bin(buf[ABX8XX_REG_MO] & 0x1F) - 1;
191 tm->tm_year = bcd2bin(buf[ABX8XX_REG_YR]) + 100;
196 static int abx80x_rtc_set_time(struct device *dev, struct rtc_time *tm)
198 struct i2c_client *client = to_i2c_client(dev);
199 unsigned char buf[8];
202 if (tm->tm_year < 100)
205 buf[ABX8XX_REG_HTH] = 0;
206 buf[ABX8XX_REG_SC] = bin2bcd(tm->tm_sec);
207 buf[ABX8XX_REG_MN] = bin2bcd(tm->tm_min);
208 buf[ABX8XX_REG_HR] = bin2bcd(tm->tm_hour);
209 buf[ABX8XX_REG_DA] = bin2bcd(tm->tm_mday);
210 buf[ABX8XX_REG_MO] = bin2bcd(tm->tm_mon + 1);
211 buf[ABX8XX_REG_YR] = bin2bcd(tm->tm_year - 100);
212 buf[ABX8XX_REG_WD] = tm->tm_wday;
214 err = i2c_smbus_write_i2c_block_data(client, ABX8XX_REG_HTH,
217 dev_err(&client->dev, "Unable to write to date registers\n");
221 /* Clear the OF bit of Oscillator Status Register */
222 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);
226 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSS,
227 flags & ~ABX8XX_OSS_OF);
229 dev_err(&client->dev, "Unable to write oscillator status register\n");
236 static irqreturn_t abx80x_handle_irq(int irq, void *dev_id)
238 struct i2c_client *client = dev_id;
239 struct abx80x_priv *priv = i2c_get_clientdata(client);
240 struct rtc_device *rtc = priv->rtc;
243 status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
247 if (status & ABX8XX_STATUS_AF)
248 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
251 * It is unclear if we'll get an interrupt before the external
254 if (status & ABX8XX_STATUS_WDT)
255 dev_alert(&client->dev, "watchdog timeout interrupt.\n");
257 i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0);
262 static int abx80x_read_alarm(struct device *dev, struct rtc_wkalrm *t)
264 struct i2c_client *client = to_i2c_client(dev);
265 unsigned char buf[7];
269 if (client->irq <= 0)
272 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_ASC,
277 irq_mask = i2c_smbus_read_byte_data(client, ABX8XX_REG_IRQ);
281 t->time.tm_sec = bcd2bin(buf[0] & 0x7F);
282 t->time.tm_min = bcd2bin(buf[1] & 0x7F);
283 t->time.tm_hour = bcd2bin(buf[2] & 0x3F);
284 t->time.tm_mday = bcd2bin(buf[3] & 0x3F);
285 t->time.tm_mon = bcd2bin(buf[4] & 0x1F) - 1;
286 t->time.tm_wday = buf[5] & 0x7;
288 t->enabled = !!(irq_mask & ABX8XX_IRQ_AIE);
289 t->pending = (buf[6] & ABX8XX_STATUS_AF) && t->enabled;
294 static int abx80x_set_alarm(struct device *dev, struct rtc_wkalrm *t)
296 struct i2c_client *client = to_i2c_client(dev);
300 if (client->irq <= 0)
304 alarm[1] = bin2bcd(t->time.tm_sec);
305 alarm[2] = bin2bcd(t->time.tm_min);
306 alarm[3] = bin2bcd(t->time.tm_hour);
307 alarm[4] = bin2bcd(t->time.tm_mday);
308 alarm[5] = bin2bcd(t->time.tm_mon + 1);
310 err = i2c_smbus_write_i2c_block_data(client, ABX8XX_REG_AHTH,
311 sizeof(alarm), alarm);
313 dev_err(&client->dev, "Unable to write alarm registers\n");
318 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
328 static int abx80x_rtc_set_autocalibration(struct device *dev,
331 struct i2c_client *client = to_i2c_client(dev);
332 int retval, flags = 0;
334 if ((autocalibration != 0) && (autocalibration != 1024) &&
335 (autocalibration != 512)) {
336 dev_err(dev, "autocalibration value outside permitted range\n");
340 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);
344 if (autocalibration == 0) {
345 flags &= ~(ABX8XX_OSC_ACAL_512 | ABX8XX_OSC_ACAL_1024);
346 } else if (autocalibration == 1024) {
347 /* 1024 autocalibration is 0x10 */
348 flags |= ABX8XX_OSC_ACAL_1024;
349 flags &= ~(ABX8XX_OSC_ACAL_512);
351 /* 512 autocalibration is 0x11 */
352 flags |= (ABX8XX_OSC_ACAL_1024 | ABX8XX_OSC_ACAL_512);
355 /* Unlock write access to Oscillator Control Register */
356 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,
359 dev_err(dev, "Failed to write CONFIG_KEY register\n");
363 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags);
368 static int abx80x_rtc_get_autocalibration(struct device *dev)
370 struct i2c_client *client = to_i2c_client(dev);
371 int flags = 0, autocalibration;
373 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);
377 if (flags & ABX8XX_OSC_ACAL_512)
378 autocalibration = 512;
379 else if (flags & ABX8XX_OSC_ACAL_1024)
380 autocalibration = 1024;
384 return autocalibration;
387 static ssize_t autocalibration_store(struct device *dev,
388 struct device_attribute *attr,
389 const char *buf, size_t count)
392 unsigned long autocalibration = 0;
394 retval = kstrtoul(buf, 10, &autocalibration);
396 dev_err(dev, "Failed to store RTC autocalibration attribute\n");
400 retval = abx80x_rtc_set_autocalibration(dev, autocalibration);
402 return retval ? retval : count;
405 static ssize_t autocalibration_show(struct device *dev,
406 struct device_attribute *attr, char *buf)
408 int autocalibration = 0;
410 autocalibration = abx80x_rtc_get_autocalibration(dev);
411 if (autocalibration < 0) {
412 dev_err(dev, "Failed to read RTC autocalibration\n");
414 return autocalibration;
417 return sprintf(buf, "%d\n", autocalibration);
420 static DEVICE_ATTR_RW(autocalibration);
422 static ssize_t oscillator_store(struct device *dev,
423 struct device_attribute *attr,
424 const char *buf, size_t count)
426 struct i2c_client *client = to_i2c_client(dev);
427 int retval, flags, rc_mode = 0;
429 if (strncmp(buf, "rc", 2) == 0) {
431 } else if (strncmp(buf, "xtal", 4) == 0) {
434 dev_err(dev, "Oscillator selection value outside permitted ones\n");
438 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);
443 flags &= ~(ABX8XX_OSC_OSEL);
445 flags |= (ABX8XX_OSC_OSEL);
447 /* Unlock write access on Oscillator Control register */
448 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,
451 dev_err(dev, "Failed to write CONFIG_KEY register\n");
455 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags);
457 dev_err(dev, "Failed to write Oscillator Control register\n");
461 return retval ? retval : count;
464 static ssize_t oscillator_show(struct device *dev,
465 struct device_attribute *attr, char *buf)
468 struct i2c_client *client = to_i2c_client(dev);
470 rc_mode = abx80x_is_rc_mode(client);
473 dev_err(dev, "Failed to read RTC oscillator selection\n");
479 return sprintf(buf, "rc\n");
481 return sprintf(buf, "xtal\n");
484 static DEVICE_ATTR_RW(oscillator);
486 static struct attribute *rtc_calib_attrs[] = {
487 &dev_attr_autocalibration.attr,
488 &dev_attr_oscillator.attr,
492 static const struct attribute_group rtc_calib_attr_group = {
493 .attrs = rtc_calib_attrs,
496 static int abx80x_alarm_irq_enable(struct device *dev, unsigned int enabled)
498 struct i2c_client *client = to_i2c_client(dev);
502 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
506 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
511 static int abx80x_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
513 struct i2c_client *client = to_i2c_client(dev);
518 status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
522 tmp = !!(status & ABX8XX_STATUS_BLF);
524 if (copy_to_user((void __user *)arg, &tmp, sizeof(int)))
530 status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
534 status &= ~ABX8XX_STATUS_BLF;
536 tmp = i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0);
547 static const struct rtc_class_ops abx80x_rtc_ops = {
548 .read_time = abx80x_rtc_read_time,
549 .set_time = abx80x_rtc_set_time,
550 .read_alarm = abx80x_read_alarm,
551 .set_alarm = abx80x_set_alarm,
552 .alarm_irq_enable = abx80x_alarm_irq_enable,
553 .ioctl = abx80x_ioctl,
556 static int abx80x_dt_trickle_cfg(struct device_node *np)
563 ret = of_property_read_string(np, "abracon,tc-diode", &diode);
567 if (!strcmp(diode, "standard"))
568 trickle_cfg |= ABX8XX_TRICKLE_STANDARD_DIODE;
569 else if (!strcmp(diode, "schottky"))
570 trickle_cfg |= ABX8XX_TRICKLE_SCHOTTKY_DIODE;
574 ret = of_property_read_u32(np, "abracon,tc-resistor", &tmp);
578 for (i = 0; i < sizeof(trickle_resistors); i++)
579 if (trickle_resistors[i] == tmp)
582 if (i == sizeof(trickle_resistors))
585 return (trickle_cfg | i);
588 static void rtc_calib_remove_sysfs_group(void *_dev)
590 struct device *dev = _dev;
592 sysfs_remove_group(&dev->kobj, &rtc_calib_attr_group);
595 #ifdef CONFIG_WATCHDOG
597 static inline u8 timeout_bits(unsigned int timeout)
599 return ((timeout << ABX8XX_WDT_BMB_SHIFT) & ABX8XX_WDT_BMB_MASK) |
603 static int __abx80x_wdog_set_timeout(struct watchdog_device *wdog,
604 unsigned int timeout)
606 struct abx80x_priv *priv = watchdog_get_drvdata(wdog);
607 u8 val = ABX8XX_WDT_WDS | timeout_bits(timeout);
610 * Writing any timeout to the WDT register resets the watchdog timer.
611 * Writing 0 disables it.
613 return i2c_smbus_write_byte_data(priv->client, ABX8XX_REG_WDT, val);
616 static int abx80x_wdog_set_timeout(struct watchdog_device *wdog,
617 unsigned int new_timeout)
621 if (watchdog_hw_running(wdog))
622 err = __abx80x_wdog_set_timeout(wdog, new_timeout);
625 wdog->timeout = new_timeout;
630 static int abx80x_wdog_ping(struct watchdog_device *wdog)
632 return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
635 static int abx80x_wdog_start(struct watchdog_device *wdog)
637 return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
640 static int abx80x_wdog_stop(struct watchdog_device *wdog)
642 return __abx80x_wdog_set_timeout(wdog, 0);
645 static const struct watchdog_info abx80x_wdog_info = {
646 .identity = "abx80x watchdog",
647 .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
650 static const struct watchdog_ops abx80x_wdog_ops = {
651 .owner = THIS_MODULE,
652 .start = abx80x_wdog_start,
653 .stop = abx80x_wdog_stop,
654 .ping = abx80x_wdog_ping,
655 .set_timeout = abx80x_wdog_set_timeout,
658 static int abx80x_setup_watchdog(struct abx80x_priv *priv)
660 priv->wdog.parent = &priv->client->dev;
661 priv->wdog.ops = &abx80x_wdog_ops;
662 priv->wdog.info = &abx80x_wdog_info;
663 priv->wdog.min_timeout = 1;
664 priv->wdog.max_timeout = ABX8XX_WDT_MAX_TIME;
665 priv->wdog.timeout = ABX8XX_WDT_MAX_TIME;
667 watchdog_set_drvdata(&priv->wdog, priv);
669 return devm_watchdog_register_device(&priv->client->dev, &priv->wdog);
672 static int abx80x_setup_watchdog(struct abx80x_priv *priv)
678 static int abx80x_probe(struct i2c_client *client,
679 const struct i2c_device_id *id)
681 struct device_node *np = client->dev.of_node;
682 struct abx80x_priv *priv;
683 int i, data, err, trickle_cfg = -EINVAL;
685 unsigned int part = id->driver_data;
686 unsigned int partnumber;
687 unsigned int majrev, minrev;
692 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
695 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_ID0,
698 dev_err(&client->dev, "Unable to read partnumber\n");
702 partnumber = (buf[0] << 8) | buf[1];
703 majrev = buf[2] >> 3;
704 minrev = buf[2] & 0x7;
705 lot = ((buf[4] & 0x80) << 2) | ((buf[6] & 0x80) << 1) | buf[3];
706 uid = ((buf[4] & 0x7f) << 8) | buf[5];
707 wafer = (buf[6] & 0x7c) >> 2;
708 dev_info(&client->dev, "model %04x, revision %u.%u, lot %x, wafer %x, uid %x\n",
709 partnumber, majrev, minrev, lot, wafer, uid);
711 data = i2c_smbus_read_byte_data(client, ABX8XX_REG_CTRL1);
713 dev_err(&client->dev, "Unable to read control register\n");
717 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CTRL1,
718 ((data & ~(ABX8XX_CTRL_12_24 |
722 dev_err(&client->dev, "Unable to write control register\n");
726 /* part autodetection */
727 if (part == ABX80X) {
728 for (i = 0; abx80x_caps[i].pn; i++)
729 if (partnumber == abx80x_caps[i].pn)
731 if (abx80x_caps[i].pn == 0) {
732 dev_err(&client->dev, "Unknown part: %04x\n",
739 if (partnumber != abx80x_caps[part].pn) {
740 dev_err(&client->dev, "partnumber mismatch %04x != %04x\n",
741 partnumber, abx80x_caps[part].pn);
745 if (np && abx80x_caps[part].has_tc)
746 trickle_cfg = abx80x_dt_trickle_cfg(np);
748 if (trickle_cfg > 0) {
749 dev_info(&client->dev, "Enabling trickle charger: %02x\n",
751 abx80x_enable_trickle_charger(client, trickle_cfg);
754 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CD_TIMER_CTL,
759 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
763 priv->rtc = devm_rtc_allocate_device(&client->dev);
764 if (IS_ERR(priv->rtc))
765 return PTR_ERR(priv->rtc);
767 priv->rtc->ops = &abx80x_rtc_ops;
768 priv->client = client;
770 i2c_set_clientdata(client, priv);
772 if (abx80x_caps[part].has_wdog) {
773 err = abx80x_setup_watchdog(priv);
778 if (client->irq > 0) {
779 dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
780 err = devm_request_threaded_irq(&client->dev, client->irq, NULL,
782 IRQF_SHARED | IRQF_ONESHOT,
786 dev_err(&client->dev, "unable to request IRQ, alarms disabled\n");
791 /* Export sysfs entries */
792 err = sysfs_create_group(&(&client->dev)->kobj, &rtc_calib_attr_group);
794 dev_err(&client->dev, "Failed to create sysfs group: %d\n",
799 err = devm_add_action_or_reset(&client->dev,
800 rtc_calib_remove_sysfs_group,
803 dev_err(&client->dev,
804 "Failed to add sysfs cleanup action: %d\n",
809 err = rtc_register_device(priv->rtc);
814 static int abx80x_remove(struct i2c_client *client)
819 static const struct i2c_device_id abx80x_id[] = {
820 { "abx80x", ABX80X },
821 { "ab0801", AB0801 },
822 { "ab0803", AB0803 },
823 { "ab0804", AB0804 },
824 { "ab0805", AB0805 },
825 { "ab1801", AB1801 },
826 { "ab1803", AB1803 },
827 { "ab1804", AB1804 },
828 { "ab1805", AB1805 },
829 { "rv1805", AB1805 },
832 MODULE_DEVICE_TABLE(i2c, abx80x_id);
834 static struct i2c_driver abx80x_driver = {
836 .name = "rtc-abx80x",
838 .probe = abx80x_probe,
839 .remove = abx80x_remove,
840 .id_table = abx80x_id,
843 module_i2c_driver(abx80x_driver);
845 MODULE_AUTHOR("Philippe De Muyter <phdm@macqel.be>");
846 MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@free-electrons.com>");
847 MODULE_DESCRIPTION("Abracon ABX80X RTC driver");
848 MODULE_LICENSE("GPL v2");