static int mpc5200_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &is_active))
return -EBUSY;
mpc5200_wdt_set_timeout(wdt_global, 30);
mpc5200_wdt_start(wdt_global);
file->private_data = wdt_global;
return nonseekable_open(inode, file);
}
static int mpc5200_wdt_open(struct inode *inode, struct file *file)
{
/* /dev/watchdog can only be opened once */
if (test_and_set_bit(0, &is_active))
return -EBUSY;
/* Set and activate the watchdog */
mpc5200_wdt_set_timeout(wdt_global, 30);
mpc5200_wdt_start(wdt_global);
file->private_data = wdt_global;
return nonseekable_open(inode, file);
}
static long mpc5200_wdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct mpc5200_wdt *wdt = file->private_data;
int __user *data = (int __user *)arg;
int timeout;
int ret = 0;
switch (cmd) {
case WDIOC_GETSUPPORT:
ret = copy_to_user(data, &mpc5200_wdt_info,
sizeof(mpc5200_wdt_info));
if (ret)
ret = -EFAULT;
break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
ret = put_user(0, data);
break;
case WDIOC_KEEPALIVE:
mpc5200_wdt_ping(wdt);
break;
case WDIOC_SETTIMEOUT:
ret = get_user(timeout, data);
if (ret)
break;
mpc5200_wdt_set_timeout(wdt, timeout);
mpc5200_wdt_start(wdt);
case WDIOC_GETTIMEOUT:
timeout = mpc5200_wdt_get_timeout(wdt);
ret = put_user(timeout, data);
break;
default:
ret = -ENOTTY;
}
return ret;
}