linux-kernel - Fwd: [PATCH 4/8] watchdog: davinci: add GET

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Message-ID: <527A28CE.2070802@ti.com>
Date:	Wed, 6 Nov 2013 13:32:30 +0200
From:	"ivan.khoronzhuk" <ivan.khoronzhuk@...com>
To:	Santosh Shilimkar <santosh.shilimkar@...com>, <wim@...ana.be>,
	<nsekhar@...com>, <linux-watchdog@...r.kernel.org>,
	<devicetree@...r.kernel.org>
CC:	<grant.likely@...aro.org>, <rob.herring@...xeda.com>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<swarren@...dotorg.org>, <galak@...nel.crashing.org>,
	<ijc+devicetree@...lion.org.uk>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Fwd: [PATCH 4/8] watchdog: davinci: add GET_STATUS option support

When watchdog timer is expired we can know about it thought
GET_STATUS ioctl option.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...com>
---
 drivers/watchdog/davinci_wdt.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c
index 6cbf2e1..a371b2d 100644
--- a/drivers/watchdog/davinci_wdt.c
+++ b/drivers/watchdog/davinci_wdt.c
@@ -144,6 +144,18 @@ static unsigned int davinci_wdt_get_timeleft(struct watchdog_device *wdd)
 	return wdd->timeout - timer_counter;
 }
 
+static unsigned int davinci_wdt_status(struct watchdog_device *wdd)
+{
+	u32 val;
+	struct davinci_wdt_device *davinci_wdt = watchdog_get_drvdata(wdd);
+
+	val = ioread32(davinci_wdt->base + WDTCR);
+	if (val & WDFLAG)
+		return WDIOF_CARDRESET;
+
+	return 0;
+}
+
 static const struct watchdog_info davinci_wdt_info = {
 	.options = WDIOF_KEEPALIVEPING,
 	.identity = "DaVinci Watchdog",
@@ -155,6 +167,7 @@ static const struct watchdog_ops davinci_wdt_ops = {
 	.stop		= davinci_wdt_ping,
 	.ping		= davinci_wdt_ping,
 	.get_timeleft	= davinci_wdt_get_timeleft,
+	.status		= davinci_wdt_status,
 };
 
 static int davinci_wdt_probe(struct platform_device *pdev)
-- 
1.7.9.5



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