summaryrefslogtreecommitdiff
path: root/drivers/char/watchdog/i8xx_tco.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/watchdog/i8xx_tco.c')
-rw-r--r--drivers/char/watchdog/i8xx_tco.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/char/watchdog/i8xx_tco.c b/drivers/char/watchdog/i8xx_tco.c
index fa2ba9ebe42a..bfbdbbf3c2f2 100644
--- a/drivers/char/watchdog/i8xx_tco.c
+++ b/drivers/char/watchdog/i8xx_tco.c
@@ -205,6 +205,23 @@ static int tco_timer_set_heartbeat (int t)
return 0;
}
+static int tco_timer_get_timeleft (int *time_left)
+{
+ unsigned char val;
+
+ spin_lock(&tco_lock);
+
+ /* read the TCO Timer */
+ val = inb (TCO1_RLD);
+ val &= 0x3f;
+
+ spin_unlock(&tco_lock);
+
+ *time_left = (int)((val * 6) / 10);
+
+ return 0;
+}
+
/*
* /dev/watchdog handling
*/
@@ -272,6 +289,7 @@ static int i8xx_tco_ioctl (struct inode *inode, struct file *file,
{
int new_options, retval = -EINVAL;
int new_heartbeat;
+ int time_left;
void __user *argp = (void __user *)arg;
int __user *p = argp;
static struct watchdog_info ident = {
@@ -320,7 +338,7 @@ static int i8xx_tco_ioctl (struct inode *inode, struct file *file,
return -EFAULT;
if (tco_timer_set_heartbeat(new_heartbeat))
- return -EINVAL;
+ return -EINVAL;
tco_timer_keepalive ();
/* Fall */
@@ -329,6 +347,14 @@ static int i8xx_tco_ioctl (struct inode *inode, struct file *file,
case WDIOC_GETTIMEOUT:
return put_user(heartbeat, p);
+ case WDIOC_GETTIMELEFT:
+ {
+ if (tco_timer_get_timeleft(&time_left))
+ return -EINVAL;
+
+ return put_user(time_left, p);
+ }
+
default:
return -ENOIOCTLCMD;
}