2 * Intersil ISL1208 rtc class driver
4 * Copyright 2005,2006 Hebert Valerio Riedel <hvr@gnu.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
13 #include <linux/module.h>
14 #include <linux/i2c.h>
15 #include <linux/bcd.h>
16 #include <linux/rtc.h>
18 #include <linux/of_irq.h>
22 #define ISL1208_REG_SC 0x00
23 #define ISL1208_REG_MN 0x01
24 #define ISL1208_REG_HR 0x02
25 #define ISL1208_REG_HR_MIL (1<<7) /* 24h/12h mode */
26 #define ISL1208_REG_HR_PM (1<<5) /* PM/AM bit in 12h mode */
27 #define ISL1208_REG_DT 0x03
28 #define ISL1208_REG_MO 0x04
29 #define ISL1208_REG_YR 0x05
30 #define ISL1208_REG_DW 0x06
31 #define ISL1208_RTC_SECTION_LEN 7
33 /* control/status section */
34 #define ISL1208_REG_SR 0x07
35 #define ISL1208_REG_SR_ARST (1<<7) /* auto reset */
36 #define ISL1208_REG_SR_XTOSCB (1<<6) /* crystal oscillator */
37 #define ISL1208_REG_SR_WRTC (1<<4) /* write rtc */
38 #define ISL1208_REG_SR_EVT (1<<3) /* event */
39 #define ISL1208_REG_SR_ALM (1<<2) /* alarm */
40 #define ISL1208_REG_SR_BAT (1<<1) /* battery */
41 #define ISL1208_REG_SR_RTCF (1<<0) /* rtc fail */
42 #define ISL1208_REG_INT 0x08
43 #define ISL1208_REG_INT_ALME (1<<6) /* alarm enable */
44 #define ISL1208_REG_INT_IM (1<<7) /* interrupt/alarm mode */
45 #define ISL1219_REG_EV 0x09
46 #define ISL1219_REG_EV_EVEN (1<<4) /* event detection enable */
47 #define ISL1219_REG_EV_EVIENB (1<<7) /* event in pull-up disable */
48 #define ISL1208_REG_ATR 0x0a
49 #define ISL1208_REG_DTR 0x0b
52 #define ISL1208_REG_SCA 0x0c
53 #define ISL1208_REG_MNA 0x0d
54 #define ISL1208_REG_HRA 0x0e
55 #define ISL1208_REG_DTA 0x0f
56 #define ISL1208_REG_MOA 0x10
57 #define ISL1208_REG_DWA 0x11
58 #define ISL1208_ALARM_SECTION_LEN 6
61 #define ISL1208_REG_USR1 0x12
62 #define ISL1208_REG_USR2 0x13
63 #define ISL1208_USR_SECTION_LEN 2
66 #define ISL1219_REG_SCT 0x14
67 #define ISL1219_REG_MNT 0x15
68 #define ISL1219_REG_HRT 0x16
69 #define ISL1219_REG_DTT 0x17
70 #define ISL1219_REG_MOT 0x18
71 #define ISL1219_REG_YRT 0x19
72 #define ISL1219_EVT_SECTION_LEN 6
74 static struct i2c_driver isl1208_driver;
76 /* ISL1208 various variants */
85 isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[],
88 u8 reg_addr[1] = { reg };
89 struct i2c_msg msgs[2] = {
92 .len = sizeof(reg_addr),
104 WARN_ON(reg > ISL1219_REG_YRT);
105 WARN_ON(reg + len > ISL1219_REG_YRT + 1);
107 ret = i2c_transfer(client->adapter, msgs, 2);
115 isl1208_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[],
118 u8 i2c_buf[ISL1208_REG_USR2 + 2];
119 struct i2c_msg msgs[1] = {
121 .addr = client->addr,
128 WARN_ON(reg > ISL1219_REG_YRT);
129 WARN_ON(reg + len > ISL1219_REG_YRT + 1);
132 memcpy(&i2c_buf[1], &buf[0], len);
134 ret = i2c_transfer(client->adapter, msgs, 1);
140 /* simple check to see whether we have a isl1208 */
142 isl1208_i2c_validate_client(struct i2c_client *client)
144 u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, };
145 u8 zero_mask[ISL1208_RTC_SECTION_LEN] = {
146 0x80, 0x80, 0x40, 0xc0, 0xe0, 0x00, 0xf8
151 ret = isl1208_i2c_read_regs(client, 0, regs, ISL1208_RTC_SECTION_LEN);
155 for (i = 0; i < ISL1208_RTC_SECTION_LEN; ++i) {
156 if (regs[i] & zero_mask[i]) /* check if bits are cleared */
164 isl1208_i2c_get_sr(struct i2c_client *client)
166 return i2c_smbus_read_byte_data(client, ISL1208_REG_SR);
170 isl1208_i2c_get_atr(struct i2c_client *client)
172 int atr = i2c_smbus_read_byte_data(client, ISL1208_REG_ATR);
176 /* The 6bit value in the ATR register controls the load
177 * capacitance C_load * in steps of 0.25pF
179 * bit (1<<5) of the ATR register is inverted
181 * C_load(ATR=0x20) = 4.50pF
182 * C_load(ATR=0x00) = 12.50pF
183 * C_load(ATR=0x1f) = 20.25pF
187 atr &= 0x3f; /* mask out lsb */
188 atr ^= 1 << 5; /* invert 6th bit */
189 atr += 2 * 9; /* add offset of 4.5pF; unit[atr] = 0.25pF */
195 isl1208_i2c_get_dtr(struct i2c_client *client)
197 int dtr = i2c_smbus_read_byte_data(client, ISL1208_REG_DTR);
201 /* dtr encodes adjustments of {-60,-40,-20,0,20,40,60} ppm */
202 dtr = ((dtr & 0x3) * 20) * (dtr & (1 << 2) ? -1 : 1);
208 isl1208_i2c_get_usr(struct i2c_client *client)
210 u8 buf[ISL1208_USR_SECTION_LEN] = { 0, };
213 ret = isl1208_i2c_read_regs(client, ISL1208_REG_USR1, buf,
214 ISL1208_USR_SECTION_LEN);
218 return (buf[1] << 8) | buf[0];
222 isl1208_i2c_set_usr(struct i2c_client *client, u16 usr)
224 u8 buf[ISL1208_USR_SECTION_LEN];
227 buf[1] = (usr >> 8) & 0xff;
229 return isl1208_i2c_set_regs(client, ISL1208_REG_USR1, buf,
230 ISL1208_USR_SECTION_LEN);
234 isl1208_rtc_toggle_alarm(struct i2c_client *client, int enable)
236 int icr = i2c_smbus_read_byte_data(client, ISL1208_REG_INT);
239 dev_err(&client->dev, "%s: reading INT failed\n", __func__);
244 icr |= ISL1208_REG_INT_ALME | ISL1208_REG_INT_IM;
246 icr &= ~(ISL1208_REG_INT_ALME | ISL1208_REG_INT_IM);
248 icr = i2c_smbus_write_byte_data(client, ISL1208_REG_INT, icr);
250 dev_err(&client->dev, "%s: writing INT failed\n", __func__);
258 isl1208_rtc_proc(struct device *dev, struct seq_file *seq)
260 struct i2c_client *const client = to_i2c_client(dev);
261 int sr, dtr, atr, usr;
263 sr = isl1208_i2c_get_sr(client);
265 dev_err(&client->dev, "%s: reading SR failed\n", __func__);
269 seq_printf(seq, "status_reg\t:%s%s%s%s%s%s (0x%.2x)\n",
270 (sr & ISL1208_REG_SR_RTCF) ? " RTCF" : "",
271 (sr & ISL1208_REG_SR_BAT) ? " BAT" : "",
272 (sr & ISL1208_REG_SR_ALM) ? " ALM" : "",
273 (sr & ISL1208_REG_SR_WRTC) ? " WRTC" : "",
274 (sr & ISL1208_REG_SR_XTOSCB) ? " XTOSCB" : "",
275 (sr & ISL1208_REG_SR_ARST) ? " ARST" : "", sr);
277 seq_printf(seq, "batt_status\t: %s\n",
278 (sr & ISL1208_REG_SR_RTCF) ? "bad" : "okay");
280 dtr = isl1208_i2c_get_dtr(client);
282 seq_printf(seq, "digital_trim\t: %d ppm\n", dtr);
284 atr = isl1208_i2c_get_atr(client);
286 seq_printf(seq, "analog_trim\t: %d.%.2d pF\n",
287 atr >> 2, (atr & 0x3) * 25);
289 usr = isl1208_i2c_get_usr(client);
291 seq_printf(seq, "user_data\t: 0x%.4x\n", usr);
297 isl1208_i2c_read_time(struct i2c_client *client, struct rtc_time *tm)
300 u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, };
302 sr = isl1208_i2c_get_sr(client);
304 dev_err(&client->dev, "%s: reading SR failed\n", __func__);
308 sr = isl1208_i2c_read_regs(client, 0, regs, ISL1208_RTC_SECTION_LEN);
310 dev_err(&client->dev, "%s: reading RTC section failed\n",
315 tm->tm_sec = bcd2bin(regs[ISL1208_REG_SC]);
316 tm->tm_min = bcd2bin(regs[ISL1208_REG_MN]);
318 /* HR field has a more complex interpretation */
320 const u8 _hr = regs[ISL1208_REG_HR];
321 if (_hr & ISL1208_REG_HR_MIL) /* 24h format */
322 tm->tm_hour = bcd2bin(_hr & 0x3f);
325 tm->tm_hour = bcd2bin(_hr & 0x1f);
326 if (_hr & ISL1208_REG_HR_PM) /* PM flag set */
331 tm->tm_mday = bcd2bin(regs[ISL1208_REG_DT]);
332 tm->tm_mon = bcd2bin(regs[ISL1208_REG_MO]) - 1; /* rtc starts at 1 */
333 tm->tm_year = bcd2bin(regs[ISL1208_REG_YR]) + 100;
334 tm->tm_wday = bcd2bin(regs[ISL1208_REG_DW]);
340 isl1208_i2c_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm)
342 struct rtc_time *const tm = &alarm->time;
343 u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, };
344 int icr, yr, sr = isl1208_i2c_get_sr(client);
347 dev_err(&client->dev, "%s: reading SR failed\n", __func__);
351 sr = isl1208_i2c_read_regs(client, ISL1208_REG_SCA, regs,
352 ISL1208_ALARM_SECTION_LEN);
354 dev_err(&client->dev, "%s: reading alarm section failed\n",
359 /* MSB of each alarm register is an enable bit */
360 tm->tm_sec = bcd2bin(regs[ISL1208_REG_SCA - ISL1208_REG_SCA] & 0x7f);
361 tm->tm_min = bcd2bin(regs[ISL1208_REG_MNA - ISL1208_REG_SCA] & 0x7f);
362 tm->tm_hour = bcd2bin(regs[ISL1208_REG_HRA - ISL1208_REG_SCA] & 0x3f);
363 tm->tm_mday = bcd2bin(regs[ISL1208_REG_DTA - ISL1208_REG_SCA] & 0x3f);
365 bcd2bin(regs[ISL1208_REG_MOA - ISL1208_REG_SCA] & 0x1f) - 1;
366 tm->tm_wday = bcd2bin(regs[ISL1208_REG_DWA - ISL1208_REG_SCA] & 0x03);
368 /* The alarm doesn't store the year so get it from the rtc section */
369 yr = i2c_smbus_read_byte_data(client, ISL1208_REG_YR);
371 dev_err(&client->dev, "%s: reading RTC YR failed\n", __func__);
374 tm->tm_year = bcd2bin(yr) + 100;
376 icr = i2c_smbus_read_byte_data(client, ISL1208_REG_INT);
378 dev_err(&client->dev, "%s: reading INT failed\n", __func__);
381 alarm->enabled = !!(icr & ISL1208_REG_INT_ALME);
387 isl1208_i2c_set_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm)
389 struct rtc_time *alarm_tm = &alarm->time;
390 u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, };
391 const int offs = ISL1208_REG_SCA;
392 struct rtc_time rtc_tm;
395 err = isl1208_i2c_read_time(client, &rtc_tm);
399 /* If the alarm time is before the current time disable the alarm */
400 if (!alarm->enabled || rtc_tm_sub(alarm_tm, &rtc_tm) <= 0)
405 /* Program the alarm and enable it for each setting */
406 regs[ISL1208_REG_SCA - offs] = bin2bcd(alarm_tm->tm_sec) | enable;
407 regs[ISL1208_REG_MNA - offs] = bin2bcd(alarm_tm->tm_min) | enable;
408 regs[ISL1208_REG_HRA - offs] = bin2bcd(alarm_tm->tm_hour) |
409 ISL1208_REG_HR_MIL | enable;
411 regs[ISL1208_REG_DTA - offs] = bin2bcd(alarm_tm->tm_mday) | enable;
412 regs[ISL1208_REG_MOA - offs] = bin2bcd(alarm_tm->tm_mon + 1) | enable;
413 regs[ISL1208_REG_DWA - offs] = bin2bcd(alarm_tm->tm_wday & 7) | enable;
415 /* write ALARM registers */
416 err = isl1208_i2c_set_regs(client, offs, regs,
417 ISL1208_ALARM_SECTION_LEN);
419 dev_err(&client->dev, "%s: writing ALARM section failed\n",
424 err = isl1208_rtc_toggle_alarm(client, enable);
432 isl1208_rtc_read_time(struct device *dev, struct rtc_time *tm)
434 return isl1208_i2c_read_time(to_i2c_client(dev), tm);
438 isl1208_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm)
441 u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, };
443 /* The clock has an 8 bit wide bcd-coded register (they never learn)
444 * for the year. tm_year is an offset from 1900 and we are interested
445 * in the 2000-2099 range, so any value less than 100 is invalid.
447 if (tm->tm_year < 100)
450 regs[ISL1208_REG_SC] = bin2bcd(tm->tm_sec);
451 regs[ISL1208_REG_MN] = bin2bcd(tm->tm_min);
452 regs[ISL1208_REG_HR] = bin2bcd(tm->tm_hour) | ISL1208_REG_HR_MIL;
454 regs[ISL1208_REG_DT] = bin2bcd(tm->tm_mday);
455 regs[ISL1208_REG_MO] = bin2bcd(tm->tm_mon + 1);
456 regs[ISL1208_REG_YR] = bin2bcd(tm->tm_year - 100);
458 regs[ISL1208_REG_DW] = bin2bcd(tm->tm_wday & 7);
460 sr = isl1208_i2c_get_sr(client);
462 dev_err(&client->dev, "%s: reading SR failed\n", __func__);
467 sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR,
468 sr | ISL1208_REG_SR_WRTC);
470 dev_err(&client->dev, "%s: writing SR failed\n", __func__);
474 /* write RTC registers */
475 sr = isl1208_i2c_set_regs(client, 0, regs, ISL1208_RTC_SECTION_LEN);
477 dev_err(&client->dev, "%s: writing RTC section failed\n",
482 /* clear WRTC again */
483 sr = isl1208_i2c_get_sr(client);
485 dev_err(&client->dev, "%s: reading SR failed\n", __func__);
488 sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR,
489 sr & ~ISL1208_REG_SR_WRTC);
491 dev_err(&client->dev, "%s: writing SR failed\n", __func__);
500 isl1208_rtc_set_time(struct device *dev, struct rtc_time *tm)
502 return isl1208_i2c_set_time(to_i2c_client(dev), tm);
506 isl1208_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
508 return isl1208_i2c_read_alarm(to_i2c_client(dev), alarm);
512 isl1208_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
514 return isl1208_i2c_set_alarm(to_i2c_client(dev), alarm);
517 static ssize_t timestamp0_store(struct device *dev,
518 struct device_attribute *attr,
519 const char *buf, size_t count)
521 struct i2c_client *client = to_i2c_client(dev->parent);
524 sr = isl1208_i2c_get_sr(client);
526 dev_err(dev, "%s: reading SR failed\n", __func__);
530 sr &= ~ISL1208_REG_SR_EVT;
532 sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr);
534 dev_err(dev, "%s: writing SR failed\n",
540 static ssize_t timestamp0_show(struct device *dev,
541 struct device_attribute *attr, char *buf)
543 struct i2c_client *client = to_i2c_client(dev->parent);
544 u8 regs[ISL1219_EVT_SECTION_LEN] = { 0, };
548 sr = isl1208_i2c_get_sr(client);
550 dev_err(dev, "%s: reading SR failed\n", __func__);
554 if (!(sr & ISL1208_REG_SR_EVT))
557 sr = isl1208_i2c_read_regs(client, ISL1219_REG_SCT, regs,
558 ISL1219_EVT_SECTION_LEN);
560 dev_err(dev, "%s: reading event section failed\n",
565 /* MSB of each alarm register is an enable bit */
566 tm.tm_sec = bcd2bin(regs[ISL1219_REG_SCT - ISL1219_REG_SCT] & 0x7f);
567 tm.tm_min = bcd2bin(regs[ISL1219_REG_MNT - ISL1219_REG_SCT] & 0x7f);
568 tm.tm_hour = bcd2bin(regs[ISL1219_REG_HRT - ISL1219_REG_SCT] & 0x3f);
569 tm.tm_mday = bcd2bin(regs[ISL1219_REG_DTT - ISL1219_REG_SCT] & 0x3f);
571 bcd2bin(regs[ISL1219_REG_MOT - ISL1219_REG_SCT] & 0x1f) - 1;
572 tm.tm_year = bcd2bin(regs[ISL1219_REG_YRT - ISL1219_REG_SCT]) + 100;
574 sr = rtc_valid_tm(&tm);
578 return sprintf(buf, "%llu\n",
579 (unsigned long long)rtc_tm_to_time64(&tm));
582 static DEVICE_ATTR_RW(timestamp0);
585 isl1208_rtc_interrupt(int irq, void *data)
587 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
588 struct i2c_client *client = data;
589 struct rtc_device *rtc = i2c_get_clientdata(client);
590 int handled = 0, sr, err;
593 * I2C reads get NAK'ed if we read straight away after an interrupt?
594 * Using a mdelay/msleep didn't seem to help either, so we work around
595 * this by continually trying to read the register for a short time.
598 sr = isl1208_i2c_get_sr(client);
602 if (time_after(jiffies, timeout)) {
603 dev_err(&client->dev, "%s: reading SR failed\n",
609 if (sr & ISL1208_REG_SR_ALM) {
610 dev_dbg(&client->dev, "alarm!\n");
612 rtc_update_irq(rtc, 1, RTC_IRQF | RTC_AF);
614 /* Clear the alarm */
615 sr &= ~ISL1208_REG_SR_ALM;
616 sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr);
618 dev_err(&client->dev, "%s: writing SR failed\n",
623 /* Disable the alarm */
624 err = isl1208_rtc_toggle_alarm(client, 0);
629 if (sr & ISL1208_REG_SR_EVT) {
630 sysfs_notify(&rtc->dev.kobj, NULL,
631 dev_attr_timestamp0.attr.name);
632 dev_warn(&client->dev, "event detected");
636 return handled ? IRQ_HANDLED : IRQ_NONE;
639 static const struct rtc_class_ops isl1208_rtc_ops = {
640 .proc = isl1208_rtc_proc,
641 .read_time = isl1208_rtc_read_time,
642 .set_time = isl1208_rtc_set_time,
643 .read_alarm = isl1208_rtc_read_alarm,
644 .set_alarm = isl1208_rtc_set_alarm,
647 /* sysfs interface */
650 isl1208_sysfs_show_atrim(struct device *dev,
651 struct device_attribute *attr, char *buf)
653 int atr = isl1208_i2c_get_atr(to_i2c_client(dev->parent));
657 return sprintf(buf, "%d.%.2d pF\n", atr >> 2, (atr & 0x3) * 25);
660 static DEVICE_ATTR(atrim, S_IRUGO, isl1208_sysfs_show_atrim, NULL);
663 isl1208_sysfs_show_dtrim(struct device *dev,
664 struct device_attribute *attr, char *buf)
666 int dtr = isl1208_i2c_get_dtr(to_i2c_client(dev->parent));
670 return sprintf(buf, "%d ppm\n", dtr);
673 static DEVICE_ATTR(dtrim, S_IRUGO, isl1208_sysfs_show_dtrim, NULL);
676 isl1208_sysfs_show_usr(struct device *dev,
677 struct device_attribute *attr, char *buf)
679 int usr = isl1208_i2c_get_usr(to_i2c_client(dev->parent));
683 return sprintf(buf, "0x%.4x\n", usr);
687 isl1208_sysfs_store_usr(struct device *dev,
688 struct device_attribute *attr,
689 const char *buf, size_t count)
693 if (buf[0] == '0' && (buf[1] == 'x' || buf[1] == 'X')) {
694 if (sscanf(buf, "%x", &usr) != 1)
697 if (sscanf(buf, "%d", &usr) != 1)
701 if (usr < 0 || usr > 0xffff)
704 if (isl1208_i2c_set_usr(to_i2c_client(dev->parent), usr))
710 static DEVICE_ATTR(usr, S_IRUGO | S_IWUSR, isl1208_sysfs_show_usr,
711 isl1208_sysfs_store_usr);
713 static struct attribute *isl1208_rtc_attrs[] = {
714 &dev_attr_atrim.attr,
715 &dev_attr_dtrim.attr,
720 static const struct attribute_group isl1208_rtc_sysfs_files = {
721 .attrs = isl1208_rtc_attrs,
724 static struct attribute *isl1219_rtc_attrs[] = {
725 &dev_attr_timestamp0.attr,
729 static const struct attribute_group isl1219_rtc_sysfs_files = {
730 .attrs = isl1219_rtc_attrs,
733 static int isl1208_setup_irq(struct i2c_client *client, int irq)
735 int rc = devm_request_threaded_irq(&client->dev, irq, NULL,
736 isl1208_rtc_interrupt,
737 IRQF_SHARED | IRQF_ONESHOT,
738 isl1208_driver.driver.name,
741 device_init_wakeup(&client->dev, 1);
742 enable_irq_wake(irq);
744 dev_err(&client->dev,
745 "Unable to request irq %d, no alarm support\n",
752 isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
755 struct rtc_device *rtc;
758 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
761 if (isl1208_i2c_validate_client(client) < 0)
764 rtc = devm_rtc_allocate_device(&client->dev);
768 rtc->ops = &isl1208_rtc_ops;
770 i2c_set_clientdata(client, rtc);
772 rc = isl1208_i2c_get_sr(client);
774 dev_err(&client->dev, "reading status failed\n");
778 if (rc & ISL1208_REG_SR_RTCF)
779 dev_warn(&client->dev, "rtc power failure detected, "
780 "please set clock.\n");
782 if (id->driver_data == TYPE_ISL1219) {
783 struct device_node *np = client->dev.of_node;
786 rc = i2c_smbus_read_byte_data(client, ISL1219_REG_EV);
788 dev_err(&client->dev, "failed to read EV reg\n");
791 rc |= ISL1219_REG_EV_EVEN;
792 if (!of_property_read_u32(np, "isil,ev-evienb", &evienb)) {
794 rc |= ISL1219_REG_EV_EVIENB;
796 rc &= ~ISL1219_REG_EV_EVIENB;
798 rc = i2c_smbus_write_byte_data(client, ISL1219_REG_EV, rc);
800 dev_err(&client->dev, "could not enable tamper detection\n");
803 rc = rtc_add_group(rtc, &isl1219_rtc_sysfs_files);
806 evdet_irq = of_irq_get_byname(np, "evdet");
809 rc = rtc_add_group(rtc, &isl1208_rtc_sysfs_files);
814 rc = isl1208_setup_irq(client, client->irq);
818 if (evdet_irq > 0 && evdet_irq != client->irq)
819 rc = isl1208_setup_irq(client, evdet_irq);
823 return rtc_register_device(rtc);
826 static const struct i2c_device_id isl1208_id[] = {
827 { "isl1208", TYPE_ISL1208 },
828 { "isl1218", TYPE_ISL1218 },
829 { "isl1219", TYPE_ISL1219 },
832 MODULE_DEVICE_TABLE(i2c, isl1208_id);
834 static const struct of_device_id isl1208_of_match[] = {
835 { .compatible = "isil,isl1208" },
836 { .compatible = "isil,isl1218" },
837 { .compatible = "isil,isl1219" },
840 MODULE_DEVICE_TABLE(of, isl1208_of_match);
842 static struct i2c_driver isl1208_driver = {
844 .name = "rtc-isl1208",
845 .of_match_table = of_match_ptr(isl1208_of_match),
847 .probe = isl1208_probe,
848 .id_table = isl1208_id,
851 module_i2c_driver(isl1208_driver);
853 MODULE_AUTHOR("Herbert Valerio Riedel <hvr@gnu.org>");
854 MODULE_DESCRIPTION("Intersil ISL1208 RTC driver");
855 MODULE_LICENSE("GPL");