From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from proxima.lp0.eu ([81.2.80.65]:58962 "EHLO proxima.lp0.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755353AbbLANIE (ORCPT ); Tue, 1 Dec 2015 08:08:04 -0500 Subject: [PATCH 07/11] watchdog: bcm63xx_wdt: Add get_timeleft function To: Guenter Roeck , Thomas Gleixner References: <565D9A40.60409@simon.arlott.org.uk> Cc: Florian Fainelli , MIPS Mailing List , Jonas Gorski , "devicetree@vger.kernel.org" , Ralf Baechle , Jason Cooper , Marc Zyngier , Kevin Cernekee , Wim Van Sebroeck , Maxime Bizon , Linux Kernel Mailing List , linux-watchdog@vger.kernel.org, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala From: Simon Arlott Message-ID: <565D9BAC.2010809@simon.arlott.org.uk> Date: Tue, 1 Dec 2015 13:07:56 +0000 MIME-Version: 1.0 In-Reply-To: <565D9A40.60409@simon.arlott.org.uk> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-watchdog-owner@vger.kernel.org List-Id: linux-watchdog@vger.kernel.org Return the remaining time from the hardware control register. Signed-off-by: Simon Arlott --- drivers/watchdog/bcm63xx_wdt.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/watchdog/bcm63xx_wdt.c b/drivers/watchdog/bcm63xx_wdt.c index 0a19731..ab4a794 100644 --- a/drivers/watchdog/bcm63xx_wdt.c +++ b/drivers/watchdog/bcm63xx_wdt.c @@ -78,6 +78,19 @@ static int bcm63xx_wdt_stop(struct watchdog_device *wdd) return 0; } +static unsigned int bcm63xx_wdt_get_timeleft(struct watchdog_device *wdd) +{ + struct bcm63xx_wdt_hw *hw = to_wdt_hw(wdd); + unsigned long flags; + u32 val; + + raw_spin_lock_irqsave(&hw->lock, flags); + val = __raw_readl(hw->regs + WDT_CTL_REG); + val /= hw->clock_hz; + raw_spin_unlock_irqrestore(&hw->lock, flags); + return val; +} + static int bcm63xx_wdt_set_timeout(struct watchdog_device *wdd, unsigned int timeout) { @@ -132,6 +145,7 @@ static struct watchdog_ops bcm63xx_wdt_ops = { .owner = THIS_MODULE, .start = bcm63xx_wdt_start, .stop = bcm63xx_wdt_stop, + .get_timeleft = bcm63xx_wdt_get_timeleft, .set_timeout = bcm63xx_wdt_set_timeout, }; @@ -256,6 +270,7 @@ module_platform_driver(bcm63xx_wdt_driver); MODULE_AUTHOR("Miguel Gaio "); MODULE_AUTHOR("Florian Fainelli "); +MODULE_AUTHOR("Simon Arlott"); MODULE_DESCRIPTION("Driver for the Broadcom BCM63xx SoC watchdog"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:bcm63xx-wdt"); -- 2.1.4 -- Simon Arlott