From mboxrd@z Thu Jan 1 00:00:00 1970 From: ivan.khoronzhuk@ti.com (ivan.khoronzhuk) Date: Wed, 6 Nov 2013 13:32:30 +0200 Subject: Fwd: [PATCH 4/8] watchdog: davinci: add GET_STATUS option support In-Reply-To: <1383680783-12114-5-git-send-email-ivan.khoronzhuk@ti.com> References: <1383680783-12114-5-git-send-email-ivan.khoronzhuk@ti.com> Message-ID: <527A28CE.2070802@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org When watchdog timer is expired we can know about it thought GET_STATUS ioctl option. Signed-off-by: Ivan Khoronzhuk --- 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