On 11/06/2013 03:32 AM, ivan.khoronzhuk wrote:
When watchdog timer is expired we can know about it thought
thought -> through or with
GET_STATUS ioctl option.
Signed-off-by: Ivan Khoronzhuk <[email protected]>
---
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;
+
"Card previously reset the CPU"
Is this really accurate / correct ?
My understanding is that the status is supposed to return the reason for a
previous reset/reboot,
not the curent condition.
+ 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)
--
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