-static long jz4740_wdt_ioctl(struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int ret = -ENOTTY;
- int heartbeat_seconds;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info *)arg, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0, (int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- jz4740_wdt_service();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(heartbeat_seconds, (int __user *)arg))
- return -EFAULT;
-
- jz4740_wdt_set_heartbeat(heartbeat_seconds);
- return 0;
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, (int *)arg);
-
- default:
- break;
- }
-
- return ret;
-}
-
-static int jz4740_wdt_release(struct inode *inode, struct file *file)
-{
- jz4740_wdt_service();
-
- if (test_and_clear_bit(WDT_OK_TO_CLOSE, &jz4740_wdt.status))
- jz4740_wdt_disable();
-
- clear_bit(WDT_IN_USE, &jz4740_wdt.status);
- return 0;
-}
-
-static const struct file_operations jz4740_wdt_fops = {