From 1aea522809e67f42295ceb1d21429d76c43697e4 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 7 Feb 2022 00:00:28 +0100 Subject: watchdog: ixp4xx: Implement restart Implement watchdog restart in the IXP4xx watchdog timer. Signed-off-by: Linus Walleij Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20220206230028.476659-1-linus.walleij@linaro.org Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/ixp4xx_wdt.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers/watchdog') diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c index 31b03fa71341..281a48d9889f 100644 --- a/drivers/watchdog/ixp4xx_wdt.c +++ b/drivers/watchdog/ixp4xx_wdt.c @@ -84,10 +84,24 @@ static int ixp4xx_wdt_set_timeout(struct watchdog_device *wdd, return 0; } +static int ixp4xx_wdt_restart(struct watchdog_device *wdd, + unsigned long action, void *data) +{ + struct ixp4xx_wdt *iwdt = to_ixp4xx_wdt(wdd); + + __raw_writel(IXP4XX_WDT_KEY, iwdt->base + IXP4XX_OSWK_OFFSET); + __raw_writel(0, iwdt->base + IXP4XX_OSWT_OFFSET); + __raw_writel(IXP4XX_WDT_COUNT_ENABLE | IXP4XX_WDT_RESET_ENABLE, + iwdt->base + IXP4XX_OSWE_OFFSET); + + return 0; +} + static const struct watchdog_ops ixp4xx_wdt_ops = { .start = ixp4xx_wdt_start, .stop = ixp4xx_wdt_stop, .set_timeout = ixp4xx_wdt_set_timeout, + .restart = ixp4xx_wdt_restart, .owner = THIS_MODULE, }; -- cgit v1.2.3-58-ga151