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authorViresh Kumar <viresh.kumar@st.com>2012-03-16 12:14:00 +0400
committerWim Van Sebroeck <wim@iguana.be>2012-03-27 22:15:37 +0400
commitfd7b673c92731fc6c0b1e999adfd87b6762ee797 (patch)
tree35fafd733a2846acb1dd7a06cb7078a7fe59086f /Documentation/watchdog/watchdog-kernel-api.txt
parent2ca1606359695cc7ce371c7829c4082d9095fc06 (diff)
downloadlinux-fd7b673c92731fc6c0b1e999adfd87b6762ee797.tar.xz
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 'Documentation/watchdog/watchdog-kernel-api.txt')
-rw-r--r--Documentation/watchdog/watchdog-kernel-api.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt
index 7d9d1da762b6..227f6cd0e5fa 100644
--- a/Documentation/watchdog/watchdog-kernel-api.txt
+++ b/Documentation/watchdog/watchdog-kernel-api.txt
@@ -1,6 +1,6 @@
The Linux WatchDog Timer Driver Core kernel API.
===============================================
-Last reviewed: 29-Nov-2011
+Last reviewed: 16-Mar-2012
Wim Van Sebroeck <wim@iguana.be>
@@ -77,6 +77,7 @@ struct watchdog_ops {
int (*ping)(struct watchdog_device *);
unsigned int (*status)(struct watchdog_device *);
int (*set_timeout)(struct watchdog_device *, unsigned int);
+ unsigned int (*get_timeleft)(struct watchdog_device *);
long (*ioctl)(struct watchdog_device *, unsigned int, unsigned long);
};
@@ -123,6 +124,7 @@ they are supported. These optional routines/operations are:
because the watchdog does not necessarily has a 1 second resolution).
(Note: the WDIOF_SETTIMEOUT needs to be set in the options field of the
watchdog's info structure).
+* get_timeleft: this routines returns the time that's left before a reset.
* ioctl: if this routine is present then it will be called first before we do
our own internal ioctl call handling. This routine should return -ENOIOCTLCMD
if a command is not supported. The parameters that are passed to the ioctl