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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>
21
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
30
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
38
39#define ABX8XX_REG_STATUS 0x0f
40#define ABX8XX_STATUS_AF BIT(2)
41#define ABX8XX_STATUS_WDT BIT(6)
42
43#define ABX8XX_REG_CTRL1 0x10
44#define ABX8XX_CTRL_WRITE BIT(0)
45#define ABX8XX_CTRL_ARST BIT(2)
46#define ABX8XX_CTRL_12_24 BIT(6)
47
48#define ABX8XX_REG_IRQ 0x12
49#define ABX8XX_IRQ_AIE BIT(2)
50#define ABX8XX_IRQ_IM_1_4 (0x3 << 5)
51
52#define ABX8XX_REG_CD_TIMER_CTL 0x18
53
54#define ABX8XX_REG_OSC 0x1c
55#define ABX8XX_OSC_FOS BIT(3)
56#define ABX8XX_OSC_BOS BIT(4)
57#define ABX8XX_OSC_ACAL_512 BIT(5)
58#define ABX8XX_OSC_ACAL_1024 BIT(6)
59
60#define ABX8XX_OSC_OSEL BIT(7)
61
62#define ABX8XX_REG_OSS 0x1d
63#define ABX8XX_OSS_OF BIT(1)
64#define ABX8XX_OSS_OMODE BIT(4)
65
66#define ABX8XX_REG_WDT 0x1b
67#define ABX8XX_WDT_WDS BIT(7)
68#define ABX8XX_WDT_BMB_MASK 0x7c
69#define ABX8XX_WDT_BMB_SHIFT 2
70#define ABX8XX_WDT_MAX_TIME (ABX8XX_WDT_BMB_MASK >> ABX8XX_WDT_BMB_SHIFT)
71#define ABX8XX_WDT_WRB_MASK 0x03
72#define ABX8XX_WDT_WRB_1HZ 0x02
73
74#define ABX8XX_REG_CFG_KEY 0x1f
75#define ABX8XX_CFG_KEY_OSC 0xa1
76#define ABX8XX_CFG_KEY_MISC 0x9d
77
78#define ABX8XX_REG_ID0 0x28
79
80#define ABX8XX_REG_TRICKLE 0x20
81#define ABX8XX_TRICKLE_CHARGE_ENABLE 0xa0
82#define ABX8XX_TRICKLE_STANDARD_DIODE 0x8
83#define ABX8XX_TRICKLE_SCHOTTKY_DIODE 0x4
84
85static u8 trickle_resistors[] = {0, 3, 6, 11};
86
87enum abx80x_chip {AB0801, AB0803, AB0804, AB0805,
88 AB1801, AB1803, AB1804, AB1805, ABX80X};
89
90struct abx80x_cap {
91 u16 pn;
92 bool has_tc;
93 bool has_wdog;
94};
95
96static struct abx80x_cap abx80x_caps[] = {
97 [AB0801] = {.pn = 0x0801},
98 [AB0803] = {.pn = 0x0803},
99 [AB0804] = {.pn = 0x0804, .has_tc = true, .has_wdog = true},
100 [AB0805] = {.pn = 0x0805, .has_tc = true, .has_wdog = true},
101 [AB1801] = {.pn = 0x1801},
102 [AB1803] = {.pn = 0x1803},
103 [AB1804] = {.pn = 0x1804, .has_tc = true, .has_wdog = true},
104 [AB1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true},
105 [ABX80X] = {.pn = 0}
106};
107
108struct abx80x_priv {
109 struct rtc_device *rtc;
110 struct i2c_client *client;
111 struct watchdog_device wdog;
112};
113
114static int abx80x_is_rc_mode(struct i2c_client *client)
115{
116 int flags = 0;
117
118 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);
119 if (flags < 0) {
120 dev_err(&client->dev,
121 "Failed to read autocalibration attribute\n");
122 return flags;
123 }
124
125 return (flags & ABX8XX_OSS_OMODE) ? 1 : 0;
126}
127
128static int abx80x_enable_trickle_charger(struct i2c_client *client,
129 u8 trickle_cfg)
130{
131 int err;
132
133
134
135
136
137 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,
138 ABX8XX_CFG_KEY_MISC);
139 if (err < 0) {
140 dev_err(&client->dev, "Unable to write configuration key\n");
141 return -EIO;
142 }
143
144 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_TRICKLE,
145 ABX8XX_TRICKLE_CHARGE_ENABLE |
146 trickle_cfg);
147 if (err < 0) {
148 dev_err(&client->dev, "Unable to write trickle register\n");
149 return -EIO;
150 }
151
152 return 0;
153}
154
155static int abx80x_rtc_read_time(struct device *dev, struct rtc_time *tm)
156{
157 struct i2c_client *client = to_i2c_client(dev);
158 unsigned char buf[8];
159 int err, flags, rc_mode = 0;
160
161
162 rc_mode = abx80x_is_rc_mode(client);
163 if (rc_mode < 0)
164 return rc_mode;
165
166 if (!rc_mode) {
167 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);
168 if (flags < 0)
169 return flags;
170
171 if (flags & ABX8XX_OSS_OF) {
172 dev_err(dev, "Oscillator failure, data is invalid.\n");
173 return -EINVAL;
174 }
175 }
176
177 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_HTH,
178 sizeof(buf), buf);
179 if (err < 0) {
180 dev_err(&client->dev, "Unable to read date\n");
181 return -EIO;
182 }
183
184 tm->tm_sec = bcd2bin(buf[ABX8XX_REG_SC] & 0x7F);
185 tm->tm_min = bcd2bin(buf[ABX8XX_REG_MN] & 0x7F);
186 tm->tm_hour = bcd2bin(buf[ABX8XX_REG_HR] & 0x3F);
187 tm->tm_wday = buf[ABX8XX_REG_WD] & 0x7;
188 tm->tm_mday = bcd2bin(buf[ABX8XX_REG_DA] & 0x3F);
189 tm->tm_mon = bcd2bin(buf[ABX8XX_REG_MO] & 0x1F) - 1;
190 tm->tm_year = bcd2bin(buf[ABX8XX_REG_YR]) + 100;
191
192 return 0;
193}
194
195static int abx80x_rtc_set_time(struct device *dev, struct rtc_time *tm)
196{
197 struct i2c_client *client = to_i2c_client(dev);
198 unsigned char buf[8];
199 int err, flags;
200
201 if (tm->tm_year < 100)
202 return -EINVAL;
203
204 buf[ABX8XX_REG_HTH] = 0;
205 buf[ABX8XX_REG_SC] = bin2bcd(tm->tm_sec);
206 buf[ABX8XX_REG_MN] = bin2bcd(tm->tm_min);
207 buf[ABX8XX_REG_HR] = bin2bcd(tm->tm_hour);
208 buf[ABX8XX_REG_DA] = bin2bcd(tm->tm_mday);
209 buf[ABX8XX_REG_MO] = bin2bcd(tm->tm_mon + 1);
210 buf[ABX8XX_REG_YR] = bin2bcd(tm->tm_year - 100);
211 buf[ABX8XX_REG_WD] = tm->tm_wday;
212
213 err = i2c_smbus_write_i2c_block_data(client, ABX8XX_REG_HTH,
214 sizeof(buf), buf);
215 if (err < 0) {
216 dev_err(&client->dev, "Unable to write to date registers\n");
217 return -EIO;
218 }
219
220
221 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSS);
222 if (flags < 0)
223 return flags;
224
225 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSS,
226 flags & ~ABX8XX_OSS_OF);
227 if (err < 0) {
228 dev_err(&client->dev, "Unable to write oscillator status register\n");
229 return err;
230 }
231
232 return 0;
233}
234
235static irqreturn_t abx80x_handle_irq(int irq, void *dev_id)
236{
237 struct i2c_client *client = dev_id;
238 struct abx80x_priv *priv = i2c_get_clientdata(client);
239 struct rtc_device *rtc = priv->rtc;
240 int status;
241
242 status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
243 if (status < 0)
244 return IRQ_NONE;
245
246 if (status & ABX8XX_STATUS_AF)
247 rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
248
249
250
251
252
253 if (status & ABX8XX_STATUS_WDT)
254 dev_alert(&client->dev, "watchdog timeout interrupt.\n");
255
256 i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0);
257
258 return IRQ_HANDLED;
259}
260
261static int abx80x_read_alarm(struct device *dev, struct rtc_wkalrm *t)
262{
263 struct i2c_client *client = to_i2c_client(dev);
264 unsigned char buf[7];
265
266 int irq_mask, err;
267
268 if (client->irq <= 0)
269 return -EINVAL;
270
271 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_ASC,
272 sizeof(buf), buf);
273 if (err)
274 return err;
275
276 irq_mask = i2c_smbus_read_byte_data(client, ABX8XX_REG_IRQ);
277 if (irq_mask < 0)
278 return irq_mask;
279
280 t->time.tm_sec = bcd2bin(buf[0] & 0x7F);
281 t->time.tm_min = bcd2bin(buf[1] & 0x7F);
282 t->time.tm_hour = bcd2bin(buf[2] & 0x3F);
283 t->time.tm_mday = bcd2bin(buf[3] & 0x3F);
284 t->time.tm_mon = bcd2bin(buf[4] & 0x1F) - 1;
285 t->time.tm_wday = buf[5] & 0x7;
286
287 t->enabled = !!(irq_mask & ABX8XX_IRQ_AIE);
288 t->pending = (buf[6] & ABX8XX_STATUS_AF) && t->enabled;
289
290 return err;
291}
292
293static int abx80x_set_alarm(struct device *dev, struct rtc_wkalrm *t)
294{
295 struct i2c_client *client = to_i2c_client(dev);
296 u8 alarm[6];
297 int err;
298
299 if (client->irq <= 0)
300 return -EINVAL;
301
302 alarm[0] = 0x0;
303 alarm[1] = bin2bcd(t->time.tm_sec);
304 alarm[2] = bin2bcd(t->time.tm_min);
305 alarm[3] = bin2bcd(t->time.tm_hour);
306 alarm[4] = bin2bcd(t->time.tm_mday);
307 alarm[5] = bin2bcd(t->time.tm_mon + 1);
308
309 err = i2c_smbus_write_i2c_block_data(client, ABX8XX_REG_AHTH,
310 sizeof(alarm), alarm);
311 if (err < 0) {
312 dev_err(&client->dev, "Unable to write alarm registers\n");
313 return -EIO;
314 }
315
316 if (t->enabled) {
317 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
318 (ABX8XX_IRQ_IM_1_4 |
319 ABX8XX_IRQ_AIE));
320 if (err)
321 return err;
322 }
323
324 return 0;
325}
326
327static int abx80x_rtc_set_autocalibration(struct device *dev,
328 int autocalibration)
329{
330 struct i2c_client *client = to_i2c_client(dev);
331 int retval, flags = 0;
332
333 if ((autocalibration != 0) && (autocalibration != 1024) &&
334 (autocalibration != 512)) {
335 dev_err(dev, "autocalibration value outside permitted range\n");
336 return -EINVAL;
337 }
338
339 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);
340 if (flags < 0)
341 return flags;
342
343 if (autocalibration == 0) {
344 flags &= ~(ABX8XX_OSC_ACAL_512 | ABX8XX_OSC_ACAL_1024);
345 } else if (autocalibration == 1024) {
346
347 flags |= ABX8XX_OSC_ACAL_1024;
348 flags &= ~(ABX8XX_OSC_ACAL_512);
349 } else {
350
351 flags |= (ABX8XX_OSC_ACAL_1024 | ABX8XX_OSC_ACAL_512);
352 }
353
354
355 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,
356 ABX8XX_CFG_KEY_OSC);
357 if (retval < 0) {
358 dev_err(dev, "Failed to write CONFIG_KEY register\n");
359 return retval;
360 }
361
362 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags);
363
364 return retval;
365}
366
367static int abx80x_rtc_get_autocalibration(struct device *dev)
368{
369 struct i2c_client *client = to_i2c_client(dev);
370 int flags = 0, autocalibration;
371
372 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);
373 if (flags < 0)
374 return flags;
375
376 if (flags & ABX8XX_OSC_ACAL_512)
377 autocalibration = 512;
378 else if (flags & ABX8XX_OSC_ACAL_1024)
379 autocalibration = 1024;
380 else
381 autocalibration = 0;
382
383 return autocalibration;
384}
385
386static ssize_t autocalibration_store(struct device *dev,
387 struct device_attribute *attr,
388 const char *buf, size_t count)
389{
390 int retval;
391 unsigned long autocalibration = 0;
392
393 retval = kstrtoul(buf, 10, &autocalibration);
394 if (retval < 0) {
395 dev_err(dev, "Failed to store RTC autocalibration attribute\n");
396 return -EINVAL;
397 }
398
399 retval = abx80x_rtc_set_autocalibration(dev, autocalibration);
400
401 return retval ? retval : count;
402}
403
404static ssize_t autocalibration_show(struct device *dev,
405 struct device_attribute *attr, char *buf)
406{
407 int autocalibration = 0;
408
409 autocalibration = abx80x_rtc_get_autocalibration(dev);
410 if (autocalibration < 0) {
411 dev_err(dev, "Failed to read RTC autocalibration\n");
412 sprintf(buf, "0\n");
413 return autocalibration;
414 }
415
416 return sprintf(buf, "%d\n", autocalibration);
417}
418
419static DEVICE_ATTR_RW(autocalibration);
420
421static ssize_t oscillator_store(struct device *dev,
422 struct device_attribute *attr,
423 const char *buf, size_t count)
424{
425 struct i2c_client *client = to_i2c_client(dev);
426 int retval, flags, rc_mode = 0;
427
428 if (strncmp(buf, "rc", 2) == 0) {
429 rc_mode = 1;
430 } else if (strncmp(buf, "xtal", 4) == 0) {
431 rc_mode = 0;
432 } else {
433 dev_err(dev, "Oscillator selection value outside permitted ones\n");
434 return -EINVAL;
435 }
436
437 flags = i2c_smbus_read_byte_data(client, ABX8XX_REG_OSC);
438 if (flags < 0)
439 return flags;
440
441 if (rc_mode == 0)
442 flags &= ~(ABX8XX_OSC_OSEL);
443 else
444 flags |= (ABX8XX_OSC_OSEL);
445
446
447 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_CFG_KEY,
448 ABX8XX_CFG_KEY_OSC);
449 if (retval < 0) {
450 dev_err(dev, "Failed to write CONFIG_KEY register\n");
451 return retval;
452 }
453
454 retval = i2c_smbus_write_byte_data(client, ABX8XX_REG_OSC, flags);
455 if (retval < 0) {
456 dev_err(dev, "Failed to write Oscillator Control register\n");
457 return retval;
458 }
459
460 return retval ? retval : count;
461}
462
463static ssize_t oscillator_show(struct device *dev,
464 struct device_attribute *attr, char *buf)
465{
466 int rc_mode = 0;
467 struct i2c_client *client = to_i2c_client(dev);
468
469 rc_mode = abx80x_is_rc_mode(client);
470
471 if (rc_mode < 0) {
472 dev_err(dev, "Failed to read RTC oscillator selection\n");
473 sprintf(buf, "\n");
474 return rc_mode;
475 }
476
477 if (rc_mode)
478 return sprintf(buf, "rc\n");
479 else
480 return sprintf(buf, "xtal\n");
481}
482
483static DEVICE_ATTR_RW(oscillator);
484
485static struct attribute *rtc_calib_attrs[] = {
486 &dev_attr_autocalibration.attr,
487 &dev_attr_oscillator.attr,
488 NULL,
489};
490
491static const struct attribute_group rtc_calib_attr_group = {
492 .attrs = rtc_calib_attrs,
493};
494
495static int abx80x_alarm_irq_enable(struct device *dev, unsigned int enabled)
496{
497 struct i2c_client *client = to_i2c_client(dev);
498 int err;
499
500 if (enabled)
501 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
502 (ABX8XX_IRQ_IM_1_4 |
503 ABX8XX_IRQ_AIE));
504 else
505 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
506 ABX8XX_IRQ_IM_1_4);
507 return err;
508}
509
510static const struct rtc_class_ops abx80x_rtc_ops = {
511 .read_time = abx80x_rtc_read_time,
512 .set_time = abx80x_rtc_set_time,
513 .read_alarm = abx80x_read_alarm,
514 .set_alarm = abx80x_set_alarm,
515 .alarm_irq_enable = abx80x_alarm_irq_enable,
516};
517
518static int abx80x_dt_trickle_cfg(struct device_node *np)
519{
520 const char *diode;
521 int trickle_cfg = 0;
522 int i, ret;
523 u32 tmp;
524
525 ret = of_property_read_string(np, "abracon,tc-diode", &diode);
526 if (ret)
527 return ret;
528
529 if (!strcmp(diode, "standard"))
530 trickle_cfg |= ABX8XX_TRICKLE_STANDARD_DIODE;
531 else if (!strcmp(diode, "schottky"))
532 trickle_cfg |= ABX8XX_TRICKLE_SCHOTTKY_DIODE;
533 else
534 return -EINVAL;
535
536 ret = of_property_read_u32(np, "abracon,tc-resistor", &tmp);
537 if (ret)
538 return ret;
539
540 for (i = 0; i < sizeof(trickle_resistors); i++)
541 if (trickle_resistors[i] == tmp)
542 break;
543
544 if (i == sizeof(trickle_resistors))
545 return -EINVAL;
546
547 return (trickle_cfg | i);
548}
549
550static void rtc_calib_remove_sysfs_group(void *_dev)
551{
552 struct device *dev = _dev;
553
554 sysfs_remove_group(&dev->kobj, &rtc_calib_attr_group);
555}
556
557#ifdef CONFIG_WATCHDOG
558
559static inline u8 timeout_bits(unsigned int timeout)
560{
561 return ((timeout << ABX8XX_WDT_BMB_SHIFT) & ABX8XX_WDT_BMB_MASK) |
562 ABX8XX_WDT_WRB_1HZ;
563}
564
565static int __abx80x_wdog_set_timeout(struct watchdog_device *wdog,
566 unsigned int timeout)
567{
568 struct abx80x_priv *priv = watchdog_get_drvdata(wdog);
569 u8 val = ABX8XX_WDT_WDS | timeout_bits(timeout);
570
571
572
573
574
575 return i2c_smbus_write_byte_data(priv->client, ABX8XX_REG_WDT, val);
576}
577
578static int abx80x_wdog_set_timeout(struct watchdog_device *wdog,
579 unsigned int new_timeout)
580{
581 int err = 0;
582
583 if (watchdog_hw_running(wdog))
584 err = __abx80x_wdog_set_timeout(wdog, new_timeout);
585
586 if (err == 0)
587 wdog->timeout = new_timeout;
588
589 return err;
590}
591
592static int abx80x_wdog_ping(struct watchdog_device *wdog)
593{
594 return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
595}
596
597static int abx80x_wdog_start(struct watchdog_device *wdog)
598{
599 return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
600}
601
602static int abx80x_wdog_stop(struct watchdog_device *wdog)
603{
604 return __abx80x_wdog_set_timeout(wdog, 0);
605}
606
607static const struct watchdog_info abx80x_wdog_info = {
608 .identity = "abx80x watchdog",
609 .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
610};
611
612static const struct watchdog_ops abx80x_wdog_ops = {
613 .owner = THIS_MODULE,
614 .start = abx80x_wdog_start,
615 .stop = abx80x_wdog_stop,
616 .ping = abx80x_wdog_ping,
617 .set_timeout = abx80x_wdog_set_timeout,
618};
619
620static int abx80x_setup_watchdog(struct abx80x_priv *priv)
621{
622 priv->wdog.parent = &priv->client->dev;
623 priv->wdog.ops = &abx80x_wdog_ops;
624 priv->wdog.info = &abx80x_wdog_info;
625 priv->wdog.min_timeout = 1;
626 priv->wdog.max_timeout = ABX8XX_WDT_MAX_TIME;
627 priv->wdog.timeout = ABX8XX_WDT_MAX_TIME;
628
629 watchdog_set_drvdata(&priv->wdog, priv);
630
631 return devm_watchdog_register_device(&priv->client->dev, &priv->wdog);
632}
633#else
634static int abx80x_setup_watchdog(struct abx80x_priv *priv)
635{
636 return 0;
637}
638#endif
639
640static int abx80x_probe(struct i2c_client *client,
641 const struct i2c_device_id *id)
642{
643 struct device_node *np = client->dev.of_node;
644 struct abx80x_priv *priv;
645 int i, data, err, trickle_cfg = -EINVAL;
646 char buf[7];
647 unsigned int part = id->driver_data;
648 unsigned int partnumber;
649 unsigned int majrev, minrev;
650 unsigned int lot;
651 unsigned int wafer;
652 unsigned int uid;
653
654 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
655 return -ENODEV;
656
657 err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_ID0,
658 sizeof(buf), buf);
659 if (err < 0) {
660 dev_err(&client->dev, "Unable to read partnumber\n");
661 return -EIO;
662 }
663
664 partnumber = (buf[0] << 8) | buf[1];
665 majrev = buf[2] >> 3;
666 minrev = buf[2] & 0x7;
667 lot = ((buf[4] & 0x80) << 2) | ((buf[6] & 0x80) << 1) | buf[3];
668 uid = ((buf[4] & 0x7f) << 8) | buf[5];
669 wafer = (buf[6] & 0x7c) >> 2;
670 dev_info(&client->dev, "model %04x, revision %u.%u, lot %x, wafer %x, uid %x\n",
671 partnumber, majrev, minrev, lot, wafer, uid);
672
673 data = i2c_smbus_read_byte_data(client, ABX8XX_REG_CTRL1);
674 if (data < 0) {
675 dev_err(&client->dev, "Unable to read control register\n");
676 return -EIO;
677 }
678
679 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CTRL1,
680 ((data & ~(ABX8XX_CTRL_12_24 |
681 ABX8XX_CTRL_ARST)) |
682 ABX8XX_CTRL_WRITE));
683 if (err < 0) {
684 dev_err(&client->dev, "Unable to write control register\n");
685 return -EIO;
686 }
687
688
689 if (part == ABX80X) {
690 for (i = 0; abx80x_caps[i].pn; i++)
691 if (partnumber == abx80x_caps[i].pn)
692 break;
693 if (abx80x_caps[i].pn == 0) {
694 dev_err(&client->dev, "Unknown part: %04x\n",
695 partnumber);
696 return -EINVAL;
697 }
698 part = i;
699 }
700
701 if (partnumber != abx80x_caps[part].pn) {
702 dev_err(&client->dev, "partnumber mismatch %04x != %04x\n",
703 partnumber, abx80x_caps[part].pn);
704 return -EINVAL;
705 }
706
707 if (np && abx80x_caps[part].has_tc)
708 trickle_cfg = abx80x_dt_trickle_cfg(np);
709
710 if (trickle_cfg > 0) {
711 dev_info(&client->dev, "Enabling trickle charger: %02x\n",
712 trickle_cfg);
713 abx80x_enable_trickle_charger(client, trickle_cfg);
714 }
715
716 err = i2c_smbus_write_byte_data(client, ABX8XX_REG_CD_TIMER_CTL,
717 BIT(2));
718 if (err)
719 return err;
720
721 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
722 if (priv == NULL)
723 return -ENOMEM;
724
725 priv->rtc = devm_rtc_allocate_device(&client->dev);
726 if (IS_ERR(priv->rtc))
727 return PTR_ERR(priv->rtc);
728
729 priv->rtc->ops = &abx80x_rtc_ops;
730 priv->client = client;
731
732 i2c_set_clientdata(client, priv);
733
734 if (abx80x_caps[part].has_wdog) {
735 err = abx80x_setup_watchdog(priv);
736 if (err)
737 return err;
738 }
739
740 if (client->irq > 0) {
741 dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
742 err = devm_request_threaded_irq(&client->dev, client->irq, NULL,
743 abx80x_handle_irq,
744 IRQF_SHARED | IRQF_ONESHOT,
745 "abx8xx",
746 client);
747 if (err) {
748 dev_err(&client->dev, "unable to request IRQ, alarms disabled\n");
749 client->irq = 0;
750 }
751 }
752
753
754 err = sysfs_create_group(&(&client->dev)->kobj, &rtc_calib_attr_group);
755 if (err) {
756 dev_err(&client->dev, "Failed to create sysfs group: %d\n",
757 err);
758 return err;
759 }
760
761 err = devm_add_action_or_reset(&client->dev,
762 rtc_calib_remove_sysfs_group,
763 &client->dev);
764 if (err) {
765 dev_err(&client->dev,
766 "Failed to add sysfs cleanup action: %d\n",
767 err);
768 return err;
769 }
770
771 err = rtc_register_device(priv->rtc);
772
773 return err;
774}
775
776static int abx80x_remove(struct i2c_client *client)
777{
778 return 0;
779}
780
781static const struct i2c_device_id abx80x_id[] = {
782 { "abx80x", ABX80X },
783 { "ab0801", AB0801 },
784 { "ab0803", AB0803 },
785 { "ab0804", AB0804 },
786 { "ab0805", AB0805 },
787 { "ab1801", AB1801 },
788 { "ab1803", AB1803 },
789 { "ab1804", AB1804 },
790 { "ab1805", AB1805 },
791 { "rv1805", AB1805 },
792 { }
793};
794MODULE_DEVICE_TABLE(i2c, abx80x_id);
795
796static struct i2c_driver abx80x_driver = {
797 .driver = {
798 .name = "rtc-abx80x",
799 },
800 .probe = abx80x_probe,
801 .remove = abx80x_remove,
802 .id_table = abx80x_id,
803};
804
805module_i2c_driver(abx80x_driver);
806
807MODULE_AUTHOR("Philippe De Muyter <phdm@macqel.be>");
808MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@free-electrons.com>");
809MODULE_DESCRIPTION("Abracon ABX80X RTC driver");
810MODULE_LICENSE("GPL v2");
811
