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 <ivan.khoronzhuk@xxxxxx> --- 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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