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12#include <linux/delay.h>
13#include <linux/i2c.h>
14#include <linux/ihex.h>
15#include <linux/firmware.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/slab.h>
19#include <linux/sysfs.h>
20#include <linux/types.h>
21#include <linux/version.h>
22#include <linux/watchdog.h>
23
24#define ZIIRAVE_TIMEOUT_MIN 3
25#define ZIIRAVE_TIMEOUT_MAX 255
26
27#define ZIIRAVE_PING_VALUE 0x0
28
29#define ZIIRAVE_STATE_INITIAL 0x0
30#define ZIIRAVE_STATE_OFF 0x1
31#define ZIIRAVE_STATE_ON 0x2
32
33#define ZIIRAVE_FW_NAME "ziirave_wdt.fw"
34
35static char *ziirave_reasons[] = {"power cycle", "hw watchdog", NULL, NULL,
36 "host request", NULL, "illegal configuration",
37 "illegal instruction", "illegal trap",
38 "unknown"};
39
40#define ZIIRAVE_WDT_FIRM_VER_MAJOR 0x1
41#define ZIIRAVE_WDT_BOOT_VER_MAJOR 0x3
42#define ZIIRAVE_WDT_RESET_REASON 0x5
43#define ZIIRAVE_WDT_STATE 0x6
44#define ZIIRAVE_WDT_TIMEOUT 0x7
45#define ZIIRAVE_WDT_TIME_LEFT 0x8
46#define ZIIRAVE_WDT_PING 0x9
47#define ZIIRAVE_WDT_RESET_DURATION 0xa
48
49#define ZIIRAVE_FIRM_PKT_TOTAL_SIZE 20
50#define ZIIRAVE_FIRM_PKT_DATA_SIZE 16
51#define ZIIRAVE_FIRM_FLASH_MEMORY_START 0x1600
52#define ZIIRAVE_FIRM_FLASH_MEMORY_END 0x2bbf
53
54
55#define ZIIRAVE_FIRM_DOWNLOAD_ACK 1
56
57#define ZIIRAVE_FIRM_DOWNLOAD_BUSY 2
58
59
60#define ZIIRAVE_FIRM_WAIT_FOR_ACK_TIMEOUT 50
61
62
63#define ZIIRAVE_CMD_DOWNLOAD_START 0x10
64#define ZIIRAVE_CMD_DOWNLOAD_END 0x11
65#define ZIIRAVE_CMD_DOWNLOAD_SET_READ_ADDR 0x12
66#define ZIIRAVE_CMD_DOWNLOAD_READ_BYTE 0x13
67#define ZIIRAVE_CMD_RESET_PROCESSOR 0x0b
68#define ZIIRAVE_CMD_JUMP_TO_BOOTLOADER 0x0c
69#define ZIIRAVE_CMD_DOWNLOAD_PACKET 0x0e
70
71struct ziirave_wdt_rev {
72 unsigned char major;
73 unsigned char minor;
74};
75
76struct ziirave_wdt_data {
77 struct mutex sysfs_mutex;
78 struct watchdog_device wdd;
79 struct ziirave_wdt_rev bootloader_rev;
80 struct ziirave_wdt_rev firmware_rev;
81 int reset_reason;
82};
83
84static int wdt_timeout;
85module_param(wdt_timeout, int, 0);
86MODULE_PARM_DESC(wdt_timeout, "Watchdog timeout in seconds");
87
88static int reset_duration;
89module_param(reset_duration, int, 0);
90MODULE_PARM_DESC(reset_duration,
91 "Watchdog reset pulse duration in milliseconds");
92
93static bool nowayout = WATCHDOG_NOWAYOUT;
94module_param(nowayout, bool, 0);
95MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started default="
96 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
97
98static int ziirave_wdt_revision(struct i2c_client *client,
99 struct ziirave_wdt_rev *rev, u8 command)
100{
101 int ret;
102
103 ret = i2c_smbus_read_byte_data(client, command);
104 if (ret < 0)
105 return ret;
106
107 rev->major = ret;
108
109 ret = i2c_smbus_read_byte_data(client, command + 1);
110 if (ret < 0)
111 return ret;
112
113 rev->minor = ret;
114
115 return 0;
116}
117
118static int ziirave_wdt_set_state(struct watchdog_device *wdd, int state)
119{
120 struct i2c_client *client = to_i2c_client(wdd->parent);
121
122 return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_STATE, state);
123}
124
125static int ziirave_wdt_start(struct watchdog_device *wdd)
126{
127 return ziirave_wdt_set_state(wdd, ZIIRAVE_STATE_ON);
128}
129
130static int ziirave_wdt_stop(struct watchdog_device *wdd)
131{
132 return ziirave_wdt_set_state(wdd, ZIIRAVE_STATE_OFF);
133}
134
135static int ziirave_wdt_ping(struct watchdog_device *wdd)
136{
137 struct i2c_client *client = to_i2c_client(wdd->parent);
138
139 return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_PING,
140 ZIIRAVE_PING_VALUE);
141}
142
143static int ziirave_wdt_set_timeout(struct watchdog_device *wdd,
144 unsigned int timeout)
145{
146 struct i2c_client *client = to_i2c_client(wdd->parent);
147 int ret;
148
149 ret = i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_TIMEOUT, timeout);
150 if (!ret)
151 wdd->timeout = timeout;
152
153 return ret;
154}
155
156static unsigned int ziirave_wdt_get_timeleft(struct watchdog_device *wdd)
157{
158 struct i2c_client *client = to_i2c_client(wdd->parent);
159 int ret;
160
161 ret = i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_TIME_LEFT);
162 if (ret < 0)
163 ret = 0;
164
165 return ret;
166}
167
168static int ziirave_firm_wait_for_ack(struct watchdog_device *wdd)
169{
170 struct i2c_client *client = to_i2c_client(wdd->parent);
171 int ret;
172 unsigned long timeout;
173
174 timeout = jiffies + msecs_to_jiffies(ZIIRAVE_FIRM_WAIT_FOR_ACK_TIMEOUT);
175 do {
176 if (time_after(jiffies, timeout))
177 return -ETIMEDOUT;
178
179 usleep_range(5000, 10000);
180
181 ret = i2c_smbus_read_byte(client);
182 if (ret < 0) {
183 dev_err(&client->dev, "Failed to read byte\n");
184 return ret;
185 }
186 } while (ret == ZIIRAVE_FIRM_DOWNLOAD_BUSY);
187
188 return ret == ZIIRAVE_FIRM_DOWNLOAD_ACK ? 0 : -EIO;
189}
190
191static int ziirave_firm_set_read_addr(struct watchdog_device *wdd, u16 addr)
192{
193 struct i2c_client *client = to_i2c_client(wdd->parent);
194 u8 address[2];
195
196 address[0] = addr & 0xff;
197 address[1] = (addr >> 8) & 0xff;
198
199 return i2c_smbus_write_block_data(client,
200 ZIIRAVE_CMD_DOWNLOAD_SET_READ_ADDR,
201 ARRAY_SIZE(address), address);
202}
203
204static int ziirave_firm_write_block_data(struct watchdog_device *wdd,
205 u8 command, u8 length, const u8 *data,
206 bool wait_for_ack)
207{
208 struct i2c_client *client = to_i2c_client(wdd->parent);
209 int ret;
210
211 ret = i2c_smbus_write_block_data(client, command, length, data);
212 if (ret) {
213 dev_err(&client->dev,
214 "Failed to send command 0x%02x: %d\n", command, ret);
215 return ret;
216 }
217
218 if (wait_for_ack)
219 ret = ziirave_firm_wait_for_ack(wdd);
220
221 return ret;
222}
223
224static int ziirave_firm_write_byte(struct watchdog_device *wdd, u8 command,
225 u8 byte, bool wait_for_ack)
226{
227 return ziirave_firm_write_block_data(wdd, command, 1, &byte,
228 wait_for_ack);
229}
230
231
232
233
234
235
236
237
238
239
240
241
242
243static int ziirave_firm_write_pkt(struct watchdog_device *wdd,
244 const struct ihex_binrec *rec)
245{
246 struct i2c_client *client = to_i2c_client(wdd->parent);
247 u8 i, checksum = 0, packet[ZIIRAVE_FIRM_PKT_TOTAL_SIZE];
248 int ret;
249 u16 addr;
250
251 memset(packet, 0, ARRAY_SIZE(packet));
252
253
254 packet[0] = (u8)be16_to_cpu(rec->len);
255
256 addr = (be32_to_cpu(rec->addr) & 0xffff) >> 1;
257 packet[1] = addr & 0xff;
258 packet[2] = (addr & 0xff00) >> 8;
259
260
261 if (be16_to_cpu(rec->len) > ZIIRAVE_FIRM_PKT_DATA_SIZE)
262 return -EMSGSIZE;
263 memcpy(packet + 3, rec->data, be16_to_cpu(rec->len));
264
265
266 for (i = 0; i < ZIIRAVE_FIRM_PKT_TOTAL_SIZE - 1; i++)
267 checksum += packet[i];
268 packet[ZIIRAVE_FIRM_PKT_TOTAL_SIZE - 1] = checksum;
269
270 ret = ziirave_firm_write_block_data(wdd, ZIIRAVE_CMD_DOWNLOAD_PACKET,
271 ARRAY_SIZE(packet), packet, true);
272 if (ret)
273 dev_err(&client->dev,
274 "Failed to write firmware packet at address 0x%04x: %d\n",
275 addr, ret);
276
277 return ret;
278}
279
280static int ziirave_firm_verify(struct watchdog_device *wdd,
281 const struct firmware *fw)
282{
283 struct i2c_client *client = to_i2c_client(wdd->parent);
284 const struct ihex_binrec *rec;
285 int i, ret;
286 u8 data[ZIIRAVE_FIRM_PKT_DATA_SIZE];
287 u16 addr;
288
289 for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {
290
291 if (!be16_to_cpu(rec->len))
292 break;
293
294 addr = (be32_to_cpu(rec->addr) & 0xffff) >> 1;
295 if (addr < ZIIRAVE_FIRM_FLASH_MEMORY_START ||
296 addr > ZIIRAVE_FIRM_FLASH_MEMORY_END)
297 continue;
298
299 ret = ziirave_firm_set_read_addr(wdd, addr);
300 if (ret) {
301 dev_err(&client->dev,
302 "Failed to send SET_READ_ADDR command: %d\n",
303 ret);
304 return ret;
305 }
306
307 for (i = 0; i < ARRAY_SIZE(data); i++) {
308 ret = i2c_smbus_read_byte_data(client,
309 ZIIRAVE_CMD_DOWNLOAD_READ_BYTE);
310 if (ret < 0) {
311 dev_err(&client->dev,
312 "Failed to READ DATA: %d\n", ret);
313 return ret;
314 }
315 data[i] = ret;
316 }
317
318 if (memcmp(data, rec->data, be16_to_cpu(rec->len))) {
319 dev_err(&client->dev,
320 "Firmware mismatch at address 0x%04x\n", addr);
321 return -EINVAL;
322 }
323 }
324
325 return 0;
326}
327
328static int ziirave_firm_upload(struct watchdog_device *wdd,
329 const struct firmware *fw)
330{
331 struct i2c_client *client = to_i2c_client(wdd->parent);
332 int ret, words_till_page_break;
333 const struct ihex_binrec *rec;
334 struct ihex_binrec *rec_new;
335
336 ret = ziirave_firm_write_byte(wdd, ZIIRAVE_CMD_JUMP_TO_BOOTLOADER, 1,
337 false);
338 if (ret)
339 return ret;
340
341 msleep(500);
342
343 ret = ziirave_firm_write_byte(wdd, ZIIRAVE_CMD_DOWNLOAD_START, 1, true);
344 if (ret)
345 return ret;
346
347 msleep(500);
348
349 for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {
350
351 if (!be16_to_cpu(rec->len))
352 break;
353
354
355 if (be16_to_cpu(rec->len) > ZIIRAVE_FIRM_PKT_DATA_SIZE) {
356 dev_err(&client->dev, "Firmware packet too long (%d)\n",
357 be16_to_cpu(rec->len));
358 return -EMSGSIZE;
359 }
360
361
362 words_till_page_break = (64 - ((be32_to_cpu(rec->addr) >> 1) &
363 0x3f));
364 if ((be16_to_cpu(rec->len) >> 1) > words_till_page_break) {
365
366
367
368
369
370 rec_new = kzalloc(sizeof(struct ihex_binrec) +
371 (words_till_page_break << 1),
372 GFP_KERNEL);
373 if (!rec_new)
374 return -ENOMEM;
375
376 rec_new->len = cpu_to_be16(words_till_page_break << 1);
377 rec_new->addr = rec->addr;
378 memcpy(rec_new->data, rec->data,
379 be16_to_cpu(rec_new->len));
380
381 ret = ziirave_firm_write_pkt(wdd, rec_new);
382 kfree(rec_new);
383 if (ret)
384 return ret;
385
386
387 rec_new = kzalloc(sizeof(struct ihex_binrec) +
388 be16_to_cpu(rec->len) -
389 (words_till_page_break << 1),
390 GFP_KERNEL);
391 if (!rec_new)
392 return -ENOMEM;
393
394
395 rec_new->len = rec->len -
396 cpu_to_be16(words_till_page_break << 1);
397
398 rec_new->addr = cpu_to_be32(be32_to_cpu(rec->addr) +
399 (words_till_page_break << 1));
400
401 memcpy(rec_new->data,
402 rec->data + (words_till_page_break << 1),
403 be16_to_cpu(rec_new->len));
404
405 ret = ziirave_firm_write_pkt(wdd, rec_new);
406 kfree(rec_new);
407 if (ret)
408 return ret;
409 } else {
410 ret = ziirave_firm_write_pkt(wdd, rec);
411 if (ret)
412 return ret;
413 }
414 }
415
416
417 rec_new = kzalloc(sizeof(struct ihex_binrec) + 1, GFP_KERNEL);
418 if (!rec_new)
419 return -ENOMEM;
420
421 ret = ziirave_firm_write_pkt(wdd, rec_new);
422 kfree(rec_new);
423 if (ret) {
424 dev_err(&client->dev, "Failed to send EMPTY packet: %d\n", ret);
425 return ret;
426 }
427
428
429 msleep(20);
430
431
432 ret = ziirave_firm_verify(wdd, fw);
433 if (ret) {
434 dev_err(&client->dev,
435 "Failed to verify firmware: %d\n", ret);
436 return ret;
437 }
438
439
440 ret = ziirave_firm_write_byte(wdd, ZIIRAVE_CMD_DOWNLOAD_END, 1, false);
441 if (ret)
442 return ret;
443
444
445 ret = ziirave_firm_write_byte(wdd, ZIIRAVE_CMD_RESET_PROCESSOR, 1,
446 false);
447 if (ret)
448 return ret;
449
450 msleep(500);
451
452 return 0;
453}
454
455static const struct watchdog_info ziirave_wdt_info = {
456 .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
457 .identity = "Zodiac RAVE Watchdog",
458};
459
460static const struct watchdog_ops ziirave_wdt_ops = {
461 .owner = THIS_MODULE,
462 .start = ziirave_wdt_start,
463 .stop = ziirave_wdt_stop,
464 .ping = ziirave_wdt_ping,
465 .set_timeout = ziirave_wdt_set_timeout,
466 .get_timeleft = ziirave_wdt_get_timeleft,
467};
468
469static ssize_t ziirave_wdt_sysfs_show_firm(struct device *dev,
470 struct device_attribute *attr,
471 char *buf)
472{
473 struct i2c_client *client = to_i2c_client(dev->parent);
474 struct ziirave_wdt_data *w_priv = i2c_get_clientdata(client);
475 int ret;
476
477 ret = mutex_lock_interruptible(&w_priv->sysfs_mutex);
478 if (ret)
479 return ret;
480
481 ret = sprintf(buf, "02.%02u.%02u", w_priv->firmware_rev.major,
482 w_priv->firmware_rev.minor);
483
484 mutex_unlock(&w_priv->sysfs_mutex);
485
486 return ret;
487}
488
489static DEVICE_ATTR(firmware_version, S_IRUGO, ziirave_wdt_sysfs_show_firm,
490 NULL);
491
492static ssize_t ziirave_wdt_sysfs_show_boot(struct device *dev,
493 struct device_attribute *attr,
494 char *buf)
495{
496 struct i2c_client *client = to_i2c_client(dev->parent);
497 struct ziirave_wdt_data *w_priv = i2c_get_clientdata(client);
498 int ret;
499
500 ret = mutex_lock_interruptible(&w_priv->sysfs_mutex);
501 if (ret)
502 return ret;
503
504 ret = sprintf(buf, "01.%02u.%02u", w_priv->bootloader_rev.major,
505 w_priv->bootloader_rev.minor);
506
507 mutex_unlock(&w_priv->sysfs_mutex);
508
509 return ret;
510}
511
512static DEVICE_ATTR(bootloader_version, S_IRUGO, ziirave_wdt_sysfs_show_boot,
513 NULL);
514
515static ssize_t ziirave_wdt_sysfs_show_reason(struct device *dev,
516 struct device_attribute *attr,
517 char *buf)
518{
519 struct i2c_client *client = to_i2c_client(dev->parent);
520 struct ziirave_wdt_data *w_priv = i2c_get_clientdata(client);
521 int ret;
522
523 ret = mutex_lock_interruptible(&w_priv->sysfs_mutex);
524 if (ret)
525 return ret;
526
527 ret = sprintf(buf, "%s", ziirave_reasons[w_priv->reset_reason]);
528
529 mutex_unlock(&w_priv->sysfs_mutex);
530
531 return ret;
532}
533
534static DEVICE_ATTR(reset_reason, S_IRUGO, ziirave_wdt_sysfs_show_reason,
535 NULL);
536
537static ssize_t ziirave_wdt_sysfs_store_firm(struct device *dev,
538 struct device_attribute *attr,
539 const char *buf, size_t count)
540{
541 struct i2c_client *client = to_i2c_client(dev->parent);
542 struct ziirave_wdt_data *w_priv = i2c_get_clientdata(client);
543 const struct firmware *fw;
544 int err;
545
546 err = request_ihex_firmware(&fw, ZIIRAVE_FW_NAME, dev);
547 if (err) {
548 dev_err(&client->dev, "Failed to request ihex firmware\n");
549 return err;
550 }
551
552 err = mutex_lock_interruptible(&w_priv->sysfs_mutex);
553 if (err)
554 goto release_firmware;
555
556 err = ziirave_firm_upload(&w_priv->wdd, fw);
557 if (err) {
558 dev_err(&client->dev, "The firmware update failed: %d\n", err);
559 goto unlock_mutex;
560 }
561
562
563 err = ziirave_wdt_revision(client, &w_priv->firmware_rev,
564 ZIIRAVE_WDT_FIRM_VER_MAJOR);
565 if (err) {
566 dev_err(&client->dev, "Failed to read firmware version: %d\n",
567 err);
568 goto unlock_mutex;
569 }
570
571 dev_info(&client->dev, "Firmware updated to version 02.%02u.%02u\n",
572 w_priv->firmware_rev.major, w_priv->firmware_rev.minor);
573
574
575 err = ziirave_wdt_set_timeout(&w_priv->wdd, w_priv->wdd.timeout);
576 if (err)
577 dev_err(&client->dev, "Failed to set timeout: %d\n", err);
578
579unlock_mutex:
580 mutex_unlock(&w_priv->sysfs_mutex);
581
582release_firmware:
583 release_firmware(fw);
584
585 return err ? err : count;
586}
587
588static DEVICE_ATTR(update_firmware, S_IWUSR, NULL,
589 ziirave_wdt_sysfs_store_firm);
590
591static struct attribute *ziirave_wdt_attrs[] = {
592 &dev_attr_firmware_version.attr,
593 &dev_attr_bootloader_version.attr,
594 &dev_attr_reset_reason.attr,
595 &dev_attr_update_firmware.attr,
596 NULL
597};
598ATTRIBUTE_GROUPS(ziirave_wdt);
599
600static int ziirave_wdt_init_duration(struct i2c_client *client)
601{
602 int ret;
603
604 if (!reset_duration) {
605
606 if (!client->dev.of_node)
607 ret = -ENODEV;
608 else
609 ret = of_property_read_u32(client->dev.of_node,
610 "reset-duration-ms",
611 &reset_duration);
612 if (ret) {
613 dev_info(&client->dev,
614 "Unable to set reset pulse duration, using default\n");
615 return 0;
616 }
617 }
618
619 if (reset_duration < 1 || reset_duration > 255)
620 return -EINVAL;
621
622 dev_info(&client->dev, "Setting reset duration to %dms",
623 reset_duration);
624
625 return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_RESET_DURATION,
626 reset_duration);
627}
628
629static int ziirave_wdt_probe(struct i2c_client *client,
630 const struct i2c_device_id *id)
631{
632 int ret;
633 struct ziirave_wdt_data *w_priv;
634 int val;
635
636 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
637 return -ENODEV;
638
639 w_priv = devm_kzalloc(&client->dev, sizeof(*w_priv), GFP_KERNEL);
640 if (!w_priv)
641 return -ENOMEM;
642
643 mutex_init(&w_priv->sysfs_mutex);
644
645 w_priv->wdd.info = &ziirave_wdt_info;
646 w_priv->wdd.ops = &ziirave_wdt_ops;
647 w_priv->wdd.min_timeout = ZIIRAVE_TIMEOUT_MIN;
648 w_priv->wdd.max_timeout = ZIIRAVE_TIMEOUT_MAX;
649 w_priv->wdd.parent = &client->dev;
650 w_priv->wdd.groups = ziirave_wdt_groups;
651
652 watchdog_init_timeout(&w_priv->wdd, wdt_timeout, &client->dev);
653
654
655
656
657
658
659 if (w_priv->wdd.timeout == 0) {
660 val = i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_TIMEOUT);
661 if (val < 0)
662 return val;
663
664 if (val < ZIIRAVE_TIMEOUT_MIN)
665 return -ENODEV;
666
667 w_priv->wdd.timeout = val;
668 } else {
669 ret = ziirave_wdt_set_timeout(&w_priv->wdd,
670 w_priv->wdd.timeout);
671 if (ret)
672 return ret;
673
674 dev_info(&client->dev, "Timeout set to %ds.",
675 w_priv->wdd.timeout);
676 }
677
678 watchdog_set_nowayout(&w_priv->wdd, nowayout);
679
680 i2c_set_clientdata(client, w_priv);
681
682
683 val = i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_STATE);
684 if (val < 0)
685 return val;
686
687 if (val == ZIIRAVE_STATE_INITIAL)
688 ziirave_wdt_stop(&w_priv->wdd);
689
690 ret = ziirave_wdt_init_duration(client);
691 if (ret)
692 return ret;
693
694 ret = ziirave_wdt_revision(client, &w_priv->firmware_rev,
695 ZIIRAVE_WDT_FIRM_VER_MAJOR);
696 if (ret)
697 return ret;
698
699 ret = ziirave_wdt_revision(client, &w_priv->bootloader_rev,
700 ZIIRAVE_WDT_BOOT_VER_MAJOR);
701 if (ret)
702 return ret;
703
704 w_priv->reset_reason = i2c_smbus_read_byte_data(client,
705 ZIIRAVE_WDT_RESET_REASON);
706 if (w_priv->reset_reason < 0)
707 return w_priv->reset_reason;
708
709 if (w_priv->reset_reason >= ARRAY_SIZE(ziirave_reasons) ||
710 !ziirave_reasons[w_priv->reset_reason])
711 return -ENODEV;
712
713 ret = watchdog_register_device(&w_priv->wdd);
714
715 return ret;
716}
717
718static int ziirave_wdt_remove(struct i2c_client *client)
719{
720 struct ziirave_wdt_data *w_priv = i2c_get_clientdata(client);
721
722 watchdog_unregister_device(&w_priv->wdd);
723
724 return 0;
725}
726
727static const struct i2c_device_id ziirave_wdt_id[] = {
728 { "rave-wdt", 0 },
729 { }
730};
731MODULE_DEVICE_TABLE(i2c, ziirave_wdt_id);
732
733static const struct of_device_id zrv_wdt_of_match[] = {
734 { .compatible = "zii,rave-wdt", },
735 { },
736};
737MODULE_DEVICE_TABLE(of, zrv_wdt_of_match);
738
739static struct i2c_driver ziirave_wdt_driver = {
740 .driver = {
741 .name = "ziirave_wdt",
742 .of_match_table = zrv_wdt_of_match,
743 },
744 .probe = ziirave_wdt_probe,
745 .remove = ziirave_wdt_remove,
746 .id_table = ziirave_wdt_id,
747};
748
749module_i2c_driver(ziirave_wdt_driver);
750
751MODULE_AUTHOR("Martyn Welch <martyn.welch@collabora.co.uk");
752MODULE_DESCRIPTION("Zodiac Aerospace RAVE Switch Watchdog Processor Driver");
753MODULE_LICENSE("GPL");
754
