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authorViresh Kumar <viresh.kumar@st.com>2012-03-16 09:14:00 +0100
committerWim Van Sebroeck <wim@iguana.be>2012-03-27 20:15:37 +0200
commitfd7b673c92731fc6c0b1e999adfd87b6762ee797 (patch)
tree35fafd733a2846acb1dd7a06cb7078a7fe59086f /drivers/watchdog/watchdog_dev.c
parent2ca1606359695cc7ce371c7829c4082d9095fc06 (diff)
downloadlinux-fd7b673c92731fc6c0b1e999adfd87b6762ee797.tar.bz2
watchdog: Add support for WDIOC_GETTIMELEFT IOCTL in watchdog core
This patch adds support for WDIOC_GETTIMELEFT IOCTL in watchdog core. So, there is another function pointer added to struct watchdog_ops, which can be passed by drivers to support this IOCTL. Related documentation is updated too. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/watchdog_dev.c')
-rw-r--r--drivers/watchdog/watchdog_dev.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index c6e1b8dd80cc..8558da912c42 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -236,6 +236,11 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd,
if (wdd->timeout == 0)
return -EOPNOTSUPP;
return put_user(wdd->timeout, p);
+ case WDIOC_GETTIMELEFT:
+ if (!wdd->ops->get_timeleft)
+ return -EOPNOTSUPP;
+
+ return put_user(wdd->ops->get_timeleft(wdd), p);
default:
return -ENOTTY;
}