From c2dc00e494cc476551b9beeb883910391ff59737 Mon Sep 17 00:00:00 2001
From: Wim Van Sebroeck <wim@iguana.be>
Date: Fri, 22 Jul 2011 18:57:23 +0000
Subject: watchdog: WatchDog Timer Driver Core - Add WDIOC_KEEPALIVE ioctl

This part add's the WDIOC_KEEPALIVE ioctl functionality to the
WatchDog Timer Driver Core framework. Please note that the
WDIOF_KEEPALIVEPING bit has to be set in the watchdog_info
options field.

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
---
 drivers/watchdog/watchdog_dev.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers/watchdog')

diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 00a611293065..2fb4cecd50d8 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -120,6 +120,11 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd,
 		return put_user(val, p);
 	case WDIOC_GETBOOTSTATUS:
 		return put_user(wdd->bootstatus, p);
+	case WDIOC_KEEPALIVE:
+		if (!(wdd->info->options & WDIOF_KEEPALIVEPING))
+			return -EOPNOTSUPP;
+		watchdog_ping(wdd);
+		return 0;
 	default:
 		return -ENOTTY;
 	}
-- 
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