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path: root/drivers/watchdog/bfin_wdt.c
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Diffstat (limited to 'drivers/watchdog/bfin_wdt.c')
-rw-r--r--drivers/watchdog/bfin_wdt.c56
1 files changed, 17 insertions, 39 deletions
diff --git a/drivers/watchdog/bfin_wdt.c b/drivers/watchdog/bfin_wdt.c
index 2159e668751c..9c7ccd1e9088 100644
--- a/drivers/watchdog/bfin_wdt.c
+++ b/drivers/watchdog/bfin_wdt.c
@@ -19,8 +19,6 @@
19#include <linux/miscdevice.h> 19#include <linux/miscdevice.h>
20#include <linux/watchdog.h> 20#include <linux/watchdog.h>
21#include <linux/fs.h> 21#include <linux/fs.h>
22#include <linux/notifier.h>
23#include <linux/reboot.h>
24#include <linux/init.h> 22#include <linux/init.h>
25#include <linux/interrupt.h> 23#include <linux/interrupt.h>
26#include <linux/uaccess.h> 24#include <linux/uaccess.h>
@@ -74,7 +72,7 @@
74 72
75static unsigned int timeout = WATCHDOG_TIMEOUT; 73static unsigned int timeout = WATCHDOG_TIMEOUT;
76static int nowayout = WATCHDOG_NOWAYOUT; 74static int nowayout = WATCHDOG_NOWAYOUT;
77static struct watchdog_info bfin_wdt_info; 75static const struct watchdog_info bfin_wdt_info;
78static unsigned long open_check; 76static unsigned long open_check;
79static char expect_close; 77static char expect_close;
80static DEFINE_SPINLOCK(bfin_wdt_spinlock); 78static DEFINE_SPINLOCK(bfin_wdt_spinlock);
@@ -309,26 +307,6 @@ static long bfin_wdt_ioctl(struct file *file,
309 } 307 }
310} 308}
311 309
312/**
313 * bfin_wdt_notify_sys - Notifier Handler
314 * @this: notifier block
315 * @code: notifier event
316 * @unused: unused
317 *
318 * Handles specific events, such as turning off the watchdog during a
319 * shutdown event.
320 */
321static int bfin_wdt_notify_sys(struct notifier_block *this,
322 unsigned long code, void *unused)
323{
324 stampit();
325
326 if (code == SYS_DOWN || code == SYS_HALT)
327 bfin_wdt_stop();
328
329 return NOTIFY_DONE;
330}
331
332#ifdef CONFIG_PM 310#ifdef CONFIG_PM
333static int state_before_suspend; 311static int state_before_suspend;
334 312
@@ -388,40 +366,28 @@ static struct miscdevice bfin_wdt_miscdev = {
388 .fops = &bfin_wdt_fops, 366 .fops = &bfin_wdt_fops,
389}; 367};
390 368
391static struct watchdog_info bfin_wdt_info = { 369static const struct watchdog_info bfin_wdt_info = {
392 .identity = "Blackfin Watchdog", 370 .identity = "Blackfin Watchdog",
393 .options = WDIOF_SETTIMEOUT | 371 .options = WDIOF_SETTIMEOUT |
394 WDIOF_KEEPALIVEPING | 372 WDIOF_KEEPALIVEPING |
395 WDIOF_MAGICCLOSE, 373 WDIOF_MAGICCLOSE,
396}; 374};
397 375
398static struct notifier_block bfin_wdt_notifier = {
399 .notifier_call = bfin_wdt_notify_sys,
400};
401
402/** 376/**
403 * bfin_wdt_probe - Initialize module 377 * bfin_wdt_probe - Initialize module
404 * 378 *
405 * Registers the misc device and notifier handler. Actual device 379 * Registers the misc device. Actual device
406 * initialization is handled by bfin_wdt_open(). 380 * initialization is handled by bfin_wdt_open().
407 */ 381 */
408static int __devinit bfin_wdt_probe(struct platform_device *pdev) 382static int __devinit bfin_wdt_probe(struct platform_device *pdev)
409{ 383{
410 int ret; 384 int ret;
411 385
412 ret = register_reboot_notifier(&bfin_wdt_notifier);
413 if (ret) {
414 pr_devinit(KERN_ERR PFX
415 "cannot register reboot notifier (err=%d)\n", ret);
416 return ret;
417 }
418
419 ret = misc_register(&bfin_wdt_miscdev); 386 ret = misc_register(&bfin_wdt_miscdev);
420 if (ret) { 387 if (ret) {
421 pr_devinit(KERN_ERR PFX 388 pr_devinit(KERN_ERR PFX
422 "cannot register miscdev on minor=%d (err=%d)\n", 389 "cannot register miscdev on minor=%d (err=%d)\n",
423 WATCHDOG_MINOR, ret); 390 WATCHDOG_MINOR, ret);
424 unregister_reboot_notifier(&bfin_wdt_notifier);
425 return ret; 391 return ret;
426 } 392 }
427 393
@@ -434,21 +400,33 @@ static int __devinit bfin_wdt_probe(struct platform_device *pdev)
434/** 400/**
435 * bfin_wdt_remove - Initialize module 401 * bfin_wdt_remove - Initialize module
436 * 402 *
437 * Unregisters the misc device and notifier handler. Actual device 403 * Unregisters the misc device. Actual device
438 * deinitialization is handled by bfin_wdt_close(). 404 * deinitialization is handled by bfin_wdt_close().
439 */ 405 */
440static int __devexit bfin_wdt_remove(struct platform_device *pdev) 406static int __devexit bfin_wdt_remove(struct platform_device *pdev)
441{ 407{
442 misc_deregister(&bfin_wdt_miscdev); 408 misc_deregister(&bfin_wdt_miscdev);
443 unregister_reboot_notifier(&bfin_wdt_notifier);
444 return 0; 409 return 0;
445} 410}
446 411
412/**
413 * bfin_wdt_shutdown - Soft Shutdown Handler
414 *
415 * Handles the soft shutdown event.
416 */
417static void bfin_wdt_shutdown(struct platform_device *pdev)
418{
419 stampit();
420
421 bfin_wdt_stop();
422}
423
447static struct platform_device *bfin_wdt_device; 424static struct platform_device *bfin_wdt_device;
448 425
449static struct platform_driver bfin_wdt_driver = { 426static struct platform_driver bfin_wdt_driver = {
450 .probe = bfin_wdt_probe, 427 .probe = bfin_wdt_probe,
451 .remove = __devexit_p(bfin_wdt_remove), 428 .remove = __devexit_p(bfin_wdt_remove),
429 .shutdown = bfin_wdt_shutdown,
452 .suspend = bfin_wdt_suspend, 430 .suspend = bfin_wdt_suspend,
453 .resume = bfin_wdt_resume, 431 .resume = bfin_wdt_resume,
454 .driver = { 432 .driver = {