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9f806850 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e51c288e KS |
2 | /* |
3 | * Kontron PLD watchdog driver | |
4 | * | |
5 | * Copyright (c) 2010-2013 Kontron Europe GmbH | |
6 | * Author: Michael Brunner <michael.brunner@kontron.com> | |
7 | * | |
e51c288e KS |
8 | * Note: From the PLD watchdog point of view timeout and pretimeout are |
9 | * defined differently than in the kernel. | |
10 | * First the pretimeout stage runs out before the timeout stage gets | |
11 | * active. | |
12 | * | |
13 | * Kernel/API: P-----| pretimeout | |
14 | * |-----------------------T timeout | |
15 | * Watchdog: |-----------------P pretimeout_stage | |
16 | * |-----T timeout_stage | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/moduleparam.h> | |
e51c288e KS |
21 | #include <linux/uaccess.h> |
22 | #include <linux/watchdog.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/mfd/kempld.h> | |
25 | ||
26 | #define KEMPLD_WDT_STAGE_TIMEOUT(x) (0x1b + (x) * 4) | |
27 | #define KEMPLD_WDT_STAGE_CFG(x) (0x18 + (x)) | |
28 | #define STAGE_CFG_GET_PRESCALER(x) (((x) & 0x30) >> 4) | |
4c4e4566 | 29 | #define STAGE_CFG_SET_PRESCALER(x) (((x) & 0x3) << 4) |
e51c288e KS |
30 | #define STAGE_CFG_PRESCALER_MASK 0x30 |
31 | #define STAGE_CFG_ACTION_MASK 0x7 | |
32 | #define STAGE_CFG_ASSERT (1 << 3) | |
33 | ||
34 | #define KEMPLD_WDT_MAX_STAGES 2 | |
35 | #define KEMPLD_WDT_KICK 0x16 | |
36 | #define KEMPLD_WDT_CFG 0x17 | |
37 | #define KEMPLD_WDT_CFG_ENABLE 0x10 | |
38 | #define KEMPLD_WDT_CFG_ENABLE_LOCK 0x8 | |
39 | #define KEMPLD_WDT_CFG_GLOBAL_LOCK 0x80 | |
40 | ||
41 | enum { | |
42 | ACTION_NONE = 0, | |
43 | ACTION_RESET, | |
44 | ACTION_NMI, | |
45 | ACTION_SMI, | |
46 | ACTION_SCI, | |
47 | ACTION_DELAY, | |
48 | }; | |
49 | ||
50 | enum { | |
51 | STAGE_TIMEOUT = 0, | |
52 | STAGE_PRETIMEOUT, | |
53 | }; | |
54 | ||
55 | enum { | |
56 | PRESCALER_21 = 0, | |
57 | PRESCALER_17, | |
58 | PRESCALER_12, | |
59 | }; | |
60 | ||
b3970bde | 61 | static const u32 kempld_prescaler[] = { |
e51c288e KS |
62 | [PRESCALER_21] = (1 << 21) - 1, |
63 | [PRESCALER_17] = (1 << 17) - 1, | |
64 | [PRESCALER_12] = (1 << 12) - 1, | |
65 | 0, | |
66 | }; | |
67 | ||
68 | struct kempld_wdt_stage { | |
69 | unsigned int id; | |
70 | u32 mask; | |
71 | }; | |
72 | ||
73 | struct kempld_wdt_data { | |
74 | struct kempld_device_data *pld; | |
75 | struct watchdog_device wdd; | |
76 | unsigned int pretimeout; | |
77 | struct kempld_wdt_stage stage[KEMPLD_WDT_MAX_STAGES]; | |
e51c288e | 78 | u8 pm_status_store; |
e51c288e KS |
79 | }; |
80 | ||
81 | #define DEFAULT_TIMEOUT 30 /* seconds */ | |
82 | #define DEFAULT_PRETIMEOUT 0 | |
83 | ||
84 | static unsigned int timeout = DEFAULT_TIMEOUT; | |
85 | module_param(timeout, uint, 0); | |
86 | MODULE_PARM_DESC(timeout, | |
87 | "Watchdog timeout in seconds. (>=0, default=" | |
88 | __MODULE_STRING(DEFAULT_TIMEOUT) ")"); | |
89 | ||
90 | static unsigned int pretimeout = DEFAULT_PRETIMEOUT; | |
91 | module_param(pretimeout, uint, 0); | |
92 | MODULE_PARM_DESC(pretimeout, | |
93 | "Watchdog pretimeout in seconds. (>=0, default=" | |
94 | __MODULE_STRING(DEFAULT_PRETIMEOUT) ")"); | |
95 | ||
96 | static bool nowayout = WATCHDOG_NOWAYOUT; | |
97 | module_param(nowayout, bool, 0); | |
98 | MODULE_PARM_DESC(nowayout, | |
99 | "Watchdog cannot be stopped once started (default=" | |
100 | __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); | |
101 | ||
102 | static int kempld_wdt_set_stage_action(struct kempld_wdt_data *wdt_data, | |
103 | struct kempld_wdt_stage *stage, | |
104 | u8 action) | |
105 | { | |
106 | struct kempld_device_data *pld = wdt_data->pld; | |
107 | u8 stage_cfg; | |
108 | ||
109 | if (!stage || !stage->mask) | |
110 | return -EINVAL; | |
111 | ||
112 | kempld_get_mutex(pld); | |
113 | stage_cfg = kempld_read8(pld, KEMPLD_WDT_STAGE_CFG(stage->id)); | |
114 | stage_cfg &= ~STAGE_CFG_ACTION_MASK; | |
115 | stage_cfg |= (action & STAGE_CFG_ACTION_MASK); | |
116 | ||
117 | if (action == ACTION_RESET) | |
118 | stage_cfg |= STAGE_CFG_ASSERT; | |
119 | else | |
120 | stage_cfg &= ~STAGE_CFG_ASSERT; | |
121 | ||
122 | kempld_write8(pld, KEMPLD_WDT_STAGE_CFG(stage->id), stage_cfg); | |
123 | kempld_release_mutex(pld); | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | static int kempld_wdt_set_stage_timeout(struct kempld_wdt_data *wdt_data, | |
129 | struct kempld_wdt_stage *stage, | |
130 | unsigned int timeout) | |
131 | { | |
132 | struct kempld_device_data *pld = wdt_data->pld; | |
3736d4eb | 133 | u32 prescaler; |
e51c288e KS |
134 | u64 stage_timeout64; |
135 | u32 stage_timeout; | |
136 | u32 remainder; | |
137 | u8 stage_cfg; | |
138 | ||
3736d4eb | 139 | prescaler = kempld_prescaler[PRESCALER_21]; |
3736d4eb | 140 | |
e51c288e KS |
141 | if (!stage) |
142 | return -EINVAL; | |
143 | ||
144 | stage_timeout64 = (u64)timeout * pld->pld_clock; | |
145 | remainder = do_div(stage_timeout64, prescaler); | |
146 | if (remainder) | |
147 | stage_timeout64++; | |
148 | ||
149 | if (stage_timeout64 > stage->mask) | |
150 | return -EINVAL; | |
151 | ||
152 | stage_timeout = stage_timeout64 & stage->mask; | |
153 | ||
154 | kempld_get_mutex(pld); | |
155 | stage_cfg = kempld_read8(pld, KEMPLD_WDT_STAGE_CFG(stage->id)); | |
156 | stage_cfg &= ~STAGE_CFG_PRESCALER_MASK; | |
a9e0436b | 157 | stage_cfg |= STAGE_CFG_SET_PRESCALER(PRESCALER_21); |
e51c288e KS |
158 | kempld_write8(pld, KEMPLD_WDT_STAGE_CFG(stage->id), stage_cfg); |
159 | kempld_write32(pld, KEMPLD_WDT_STAGE_TIMEOUT(stage->id), | |
160 | stage_timeout); | |
161 | kempld_release_mutex(pld); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | /* | |
167 | * kempld_get_mutex must be called prior to calling this function. | |
168 | */ | |
169 | static unsigned int kempld_wdt_get_timeout(struct kempld_wdt_data *wdt_data, | |
170 | struct kempld_wdt_stage *stage) | |
171 | { | |
172 | struct kempld_device_data *pld = wdt_data->pld; | |
173 | unsigned int timeout; | |
174 | u64 stage_timeout; | |
175 | u32 prescaler; | |
176 | u32 remainder; | |
177 | u8 stage_cfg; | |
178 | ||
179 | if (!stage->mask) | |
180 | return 0; | |
181 | ||
182 | stage_cfg = kempld_read8(pld, KEMPLD_WDT_STAGE_CFG(stage->id)); | |
183 | stage_timeout = kempld_read32(pld, KEMPLD_WDT_STAGE_TIMEOUT(stage->id)); | |
184 | prescaler = kempld_prescaler[STAGE_CFG_GET_PRESCALER(stage_cfg)]; | |
185 | ||
186 | stage_timeout = (stage_timeout & stage->mask) * prescaler; | |
187 | remainder = do_div(stage_timeout, pld->pld_clock); | |
188 | if (remainder) | |
189 | stage_timeout++; | |
190 | ||
191 | timeout = stage_timeout; | |
192 | WARN_ON_ONCE(timeout != stage_timeout); | |
193 | ||
194 | return timeout; | |
195 | } | |
196 | ||
197 | static int kempld_wdt_set_timeout(struct watchdog_device *wdd, | |
198 | unsigned int timeout) | |
199 | { | |
200 | struct kempld_wdt_data *wdt_data = watchdog_get_drvdata(wdd); | |
201 | struct kempld_wdt_stage *pretimeout_stage; | |
202 | struct kempld_wdt_stage *timeout_stage; | |
203 | int ret; | |
204 | ||
205 | timeout_stage = &wdt_data->stage[STAGE_TIMEOUT]; | |
206 | pretimeout_stage = &wdt_data->stage[STAGE_PRETIMEOUT]; | |
207 | ||
208 | if (pretimeout_stage->mask && wdt_data->pretimeout > 0) | |
209 | timeout = wdt_data->pretimeout; | |
210 | ||
211 | ret = kempld_wdt_set_stage_action(wdt_data, timeout_stage, | |
212 | ACTION_RESET); | |
213 | if (ret) | |
214 | return ret; | |
215 | ret = kempld_wdt_set_stage_timeout(wdt_data, timeout_stage, | |
216 | timeout); | |
217 | if (ret) | |
218 | return ret; | |
219 | ||
220 | wdd->timeout = timeout; | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static int kempld_wdt_set_pretimeout(struct watchdog_device *wdd, | |
225 | unsigned int pretimeout) | |
226 | { | |
227 | struct kempld_wdt_data *wdt_data = watchdog_get_drvdata(wdd); | |
228 | struct kempld_wdt_stage *pretimeout_stage; | |
229 | u8 action = ACTION_NONE; | |
230 | int ret; | |
231 | ||
232 | pretimeout_stage = &wdt_data->stage[STAGE_PRETIMEOUT]; | |
233 | ||
234 | if (!pretimeout_stage->mask) | |
235 | return -ENXIO; | |
236 | ||
237 | if (pretimeout > wdd->timeout) | |
238 | return -EINVAL; | |
239 | ||
240 | if (pretimeout > 0) | |
241 | action = ACTION_NMI; | |
242 | ||
243 | ret = kempld_wdt_set_stage_action(wdt_data, pretimeout_stage, | |
244 | action); | |
245 | if (ret) | |
246 | return ret; | |
247 | ret = kempld_wdt_set_stage_timeout(wdt_data, pretimeout_stage, | |
248 | wdd->timeout - pretimeout); | |
249 | if (ret) | |
250 | return ret; | |
251 | ||
252 | wdt_data->pretimeout = pretimeout; | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static void kempld_wdt_update_timeouts(struct kempld_wdt_data *wdt_data) | |
257 | { | |
258 | struct kempld_device_data *pld = wdt_data->pld; | |
259 | struct kempld_wdt_stage *pretimeout_stage; | |
260 | struct kempld_wdt_stage *timeout_stage; | |
261 | unsigned int pretimeout, timeout; | |
262 | ||
263 | pretimeout_stage = &wdt_data->stage[STAGE_PRETIMEOUT]; | |
264 | timeout_stage = &wdt_data->stage[STAGE_TIMEOUT]; | |
265 | ||
266 | kempld_get_mutex(pld); | |
267 | pretimeout = kempld_wdt_get_timeout(wdt_data, pretimeout_stage); | |
268 | timeout = kempld_wdt_get_timeout(wdt_data, timeout_stage); | |
269 | kempld_release_mutex(pld); | |
270 | ||
271 | if (pretimeout) | |
272 | wdt_data->pretimeout = timeout; | |
273 | else | |
274 | wdt_data->pretimeout = 0; | |
275 | ||
276 | wdt_data->wdd.timeout = pretimeout + timeout; | |
277 | } | |
278 | ||
279 | static int kempld_wdt_start(struct watchdog_device *wdd) | |
280 | { | |
281 | struct kempld_wdt_data *wdt_data = watchdog_get_drvdata(wdd); | |
282 | struct kempld_device_data *pld = wdt_data->pld; | |
283 | u8 status; | |
284 | int ret; | |
285 | ||
286 | ret = kempld_wdt_set_timeout(wdd, wdd->timeout); | |
287 | if (ret) | |
288 | return ret; | |
289 | ||
290 | kempld_get_mutex(pld); | |
291 | status = kempld_read8(pld, KEMPLD_WDT_CFG); | |
292 | status |= KEMPLD_WDT_CFG_ENABLE; | |
293 | kempld_write8(pld, KEMPLD_WDT_CFG, status); | |
294 | status = kempld_read8(pld, KEMPLD_WDT_CFG); | |
295 | kempld_release_mutex(pld); | |
296 | ||
297 | /* Check if the watchdog was enabled */ | |
298 | if (!(status & KEMPLD_WDT_CFG_ENABLE)) | |
299 | return -EACCES; | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | static int kempld_wdt_stop(struct watchdog_device *wdd) | |
305 | { | |
306 | struct kempld_wdt_data *wdt_data = watchdog_get_drvdata(wdd); | |
307 | struct kempld_device_data *pld = wdt_data->pld; | |
308 | u8 status; | |
309 | ||
310 | kempld_get_mutex(pld); | |
311 | status = kempld_read8(pld, KEMPLD_WDT_CFG); | |
312 | status &= ~KEMPLD_WDT_CFG_ENABLE; | |
313 | kempld_write8(pld, KEMPLD_WDT_CFG, status); | |
314 | status = kempld_read8(pld, KEMPLD_WDT_CFG); | |
315 | kempld_release_mutex(pld); | |
316 | ||
317 | /* Check if the watchdog was disabled */ | |
318 | if (status & KEMPLD_WDT_CFG_ENABLE) | |
319 | return -EACCES; | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static int kempld_wdt_keepalive(struct watchdog_device *wdd) | |
325 | { | |
326 | struct kempld_wdt_data *wdt_data = watchdog_get_drvdata(wdd); | |
327 | struct kempld_device_data *pld = wdt_data->pld; | |
328 | ||
329 | kempld_get_mutex(pld); | |
330 | kempld_write8(pld, KEMPLD_WDT_KICK, 'K'); | |
331 | kempld_release_mutex(pld); | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static long kempld_wdt_ioctl(struct watchdog_device *wdd, unsigned int cmd, | |
337 | unsigned long arg) | |
338 | { | |
339 | struct kempld_wdt_data *wdt_data = watchdog_get_drvdata(wdd); | |
340 | void __user *argp = (void __user *)arg; | |
341 | int ret = -ENOIOCTLCMD; | |
342 | int __user *p = argp; | |
343 | int new_value; | |
344 | ||
345 | switch (cmd) { | |
346 | case WDIOC_SETPRETIMEOUT: | |
347 | if (get_user(new_value, p)) | |
348 | return -EFAULT; | |
349 | ret = kempld_wdt_set_pretimeout(wdd, new_value); | |
350 | if (ret) | |
351 | return ret; | |
352 | ret = kempld_wdt_keepalive(wdd); | |
353 | break; | |
354 | case WDIOC_GETPRETIMEOUT: | |
b3970bde | 355 | ret = put_user(wdt_data->pretimeout, (int __user *)arg); |
e51c288e KS |
356 | break; |
357 | } | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
362 | static int kempld_wdt_probe_stages(struct watchdog_device *wdd) | |
363 | { | |
364 | struct kempld_wdt_data *wdt_data = watchdog_get_drvdata(wdd); | |
365 | struct kempld_device_data *pld = wdt_data->pld; | |
366 | struct kempld_wdt_stage *pretimeout_stage; | |
367 | struct kempld_wdt_stage *timeout_stage; | |
368 | u8 index, data, data_orig; | |
369 | u32 mask; | |
370 | int i, j; | |
371 | ||
372 | pretimeout_stage = &wdt_data->stage[STAGE_PRETIMEOUT]; | |
373 | timeout_stage = &wdt_data->stage[STAGE_TIMEOUT]; | |
374 | ||
375 | pretimeout_stage->mask = 0; | |
376 | timeout_stage->mask = 0; | |
377 | ||
378 | for (i = 0; i < 3; i++) { | |
379 | index = KEMPLD_WDT_STAGE_TIMEOUT(i); | |
380 | mask = 0; | |
381 | ||
382 | kempld_get_mutex(pld); | |
383 | /* Probe each byte individually. */ | |
384 | for (j = 0; j < 4; j++) { | |
385 | data_orig = kempld_read8(pld, index + j); | |
386 | kempld_write8(pld, index + j, 0x00); | |
387 | data = kempld_read8(pld, index + j); | |
388 | /* A failed write means this byte is reserved */ | |
389 | if (data != 0x00) | |
390 | break; | |
391 | kempld_write8(pld, index + j, data_orig); | |
392 | mask |= 0xff << (j * 8); | |
393 | } | |
394 | kempld_release_mutex(pld); | |
395 | ||
396 | /* Assign available stages to timeout and pretimeout */ | |
397 | if (!timeout_stage->mask) { | |
398 | timeout_stage->mask = mask; | |
399 | timeout_stage->id = i; | |
400 | } else { | |
401 | if (pld->feature_mask & KEMPLD_FEATURE_BIT_NMI) { | |
402 | pretimeout_stage->mask = timeout_stage->mask; | |
403 | timeout_stage->mask = mask; | |
404 | pretimeout_stage->id = timeout_stage->id; | |
405 | timeout_stage->id = i; | |
406 | } | |
407 | break; | |
408 | } | |
409 | } | |
410 | ||
411 | if (!timeout_stage->mask) | |
412 | return -ENODEV; | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
6c368932 | 417 | static const struct watchdog_info kempld_wdt_info = { |
e51c288e KS |
418 | .identity = "KEMPLD Watchdog", |
419 | .options = WDIOF_SETTIMEOUT | | |
420 | WDIOF_KEEPALIVEPING | | |
421 | WDIOF_MAGICCLOSE | | |
422 | WDIOF_PRETIMEOUT | |
423 | }; | |
424 | ||
85f15cfc | 425 | static const struct watchdog_ops kempld_wdt_ops = { |
e51c288e KS |
426 | .owner = THIS_MODULE, |
427 | .start = kempld_wdt_start, | |
428 | .stop = kempld_wdt_stop, | |
429 | .ping = kempld_wdt_keepalive, | |
430 | .set_timeout = kempld_wdt_set_timeout, | |
431 | .ioctl = kempld_wdt_ioctl, | |
432 | }; | |
433 | ||
434 | static int kempld_wdt_probe(struct platform_device *pdev) | |
435 | { | |
436 | struct kempld_device_data *pld = dev_get_drvdata(pdev->dev.parent); | |
437 | struct kempld_wdt_data *wdt_data; | |
438 | struct device *dev = &pdev->dev; | |
439 | struct watchdog_device *wdd; | |
440 | u8 status; | |
441 | int ret = 0; | |
442 | ||
443 | wdt_data = devm_kzalloc(dev, sizeof(*wdt_data), GFP_KERNEL); | |
444 | if (!wdt_data) | |
445 | return -ENOMEM; | |
446 | ||
447 | wdt_data->pld = pld; | |
448 | wdd = &wdt_data->wdd; | |
449 | wdd->parent = dev; | |
450 | ||
451 | kempld_get_mutex(pld); | |
452 | status = kempld_read8(pld, KEMPLD_WDT_CFG); | |
453 | kempld_release_mutex(pld); | |
454 | ||
455 | /* Enable nowayout if watchdog is already locked */ | |
456 | if (status & (KEMPLD_WDT_CFG_ENABLE_LOCK | | |
457 | KEMPLD_WDT_CFG_GLOBAL_LOCK)) { | |
458 | if (!nowayout) | |
459 | dev_warn(dev, | |
4689ba97 | 460 | "Forcing nowayout - watchdog lock enabled!\n"); |
e51c288e KS |
461 | nowayout = true; |
462 | } | |
463 | ||
464 | wdd->info = &kempld_wdt_info; | |
465 | wdd->ops = &kempld_wdt_ops; | |
466 | ||
467 | watchdog_set_drvdata(wdd, wdt_data); | |
468 | watchdog_set_nowayout(wdd, nowayout); | |
469 | ||
470 | ret = kempld_wdt_probe_stages(wdd); | |
471 | if (ret) | |
472 | return ret; | |
473 | ||
474 | kempld_wdt_set_timeout(wdd, timeout); | |
475 | kempld_wdt_set_pretimeout(wdd, pretimeout); | |
476 | ||
477 | /* Check if watchdog is already enabled */ | |
478 | if (status & KEMPLD_WDT_CFG_ENABLE) { | |
479 | /* Get current watchdog settings */ | |
480 | kempld_wdt_update_timeouts(wdt_data); | |
481 | dev_info(dev, "Watchdog was already enabled\n"); | |
482 | } | |
483 | ||
484 | platform_set_drvdata(pdev, wdt_data); | |
4689ba97 GR |
485 | watchdog_stop_on_reboot(wdd); |
486 | watchdog_stop_on_unregister(wdd); | |
487 | ret = devm_watchdog_register_device(dev, wdd); | |
e51c288e KS |
488 | if (ret) |
489 | return ret; | |
490 | ||
491 | dev_info(dev, "Watchdog registered with %ds timeout\n", wdd->timeout); | |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
e51c288e KS |
496 | /* Disable watchdog if it is active during suspend */ |
497 | static int kempld_wdt_suspend(struct platform_device *pdev, | |
498 | pm_message_t message) | |
499 | { | |
500 | struct kempld_wdt_data *wdt_data = platform_get_drvdata(pdev); | |
501 | struct kempld_device_data *pld = wdt_data->pld; | |
502 | struct watchdog_device *wdd = &wdt_data->wdd; | |
503 | ||
504 | kempld_get_mutex(pld); | |
505 | wdt_data->pm_status_store = kempld_read8(pld, KEMPLD_WDT_CFG); | |
506 | kempld_release_mutex(pld); | |
507 | ||
508 | kempld_wdt_update_timeouts(wdt_data); | |
509 | ||
510 | if (wdt_data->pm_status_store & KEMPLD_WDT_CFG_ENABLE) | |
511 | return kempld_wdt_stop(wdd); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | /* Enable watchdog and configure it if necessary */ | |
517 | static int kempld_wdt_resume(struct platform_device *pdev) | |
518 | { | |
519 | struct kempld_wdt_data *wdt_data = platform_get_drvdata(pdev); | |
520 | struct watchdog_device *wdd = &wdt_data->wdd; | |
521 | ||
522 | /* | |
523 | * If watchdog was stopped before suspend be sure it gets disabled | |
524 | * again, for the case BIOS has enabled it during resume | |
525 | */ | |
526 | if (wdt_data->pm_status_store & KEMPLD_WDT_CFG_ENABLE) | |
527 | return kempld_wdt_start(wdd); | |
528 | else | |
529 | return kempld_wdt_stop(wdd); | |
530 | } | |
e51c288e KS |
531 | |
532 | static struct platform_driver kempld_wdt_driver = { | |
533 | .driver = { | |
534 | .name = "kempld-wdt", | |
e51c288e KS |
535 | }, |
536 | .probe = kempld_wdt_probe, | |
758f46c2 PC |
537 | .suspend = pm_ptr(kempld_wdt_suspend), |
538 | .resume = pm_ptr(kempld_wdt_resume), | |
e51c288e KS |
539 | }; |
540 | ||
541 | module_platform_driver(kempld_wdt_driver); | |
542 | ||
543 | MODULE_DESCRIPTION("KEM PLD Watchdog Driver"); | |
544 | MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>"); | |
545 | MODULE_LICENSE("GPL"); |