From 2a31bf20808aa3642a942ab9ce421ebb7585eb3a Mon Sep 17 00:00:00 2001 From: Keguang Zhang Date: Thu, 30 Mar 2023 19:20:51 +0800 Subject: watchdog: loongson1_wdt: Implement restart handler Implement restart handler for the Loongson-1 watchdog driver and define the watchdog registers instead of including the legacy header. Signed-off-by: Keguang Zhang Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20230330112051.551648-3-keguang.zhang@gmail.com Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/loongson1_wdt.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) (limited to 'drivers/watchdog/loongson1_wdt.c') diff --git a/drivers/watchdog/loongson1_wdt.c b/drivers/watchdog/loongson1_wdt.c index c55656cfb403..3c651c50a98c 100644 --- a/drivers/watchdog/loongson1_wdt.c +++ b/drivers/watchdog/loongson1_wdt.c @@ -7,7 +7,11 @@ #include #include #include -#include + +/* Loongson 1 Watchdog Register Definitions */ +#define WDT_EN 0x0 +#define WDT_TIMER 0x4 +#define WDT_SET 0x8 #define DEFAULT_HEARTBEAT 30 @@ -66,6 +70,18 @@ static int ls1x_wdt_stop(struct watchdog_device *wdt_dev) return 0; } +static int ls1x_wdt_restart(struct watchdog_device *wdt_dev, + unsigned long action, void *data) +{ + struct ls1x_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev); + + writel(0x1, drvdata->base + WDT_EN); + writel(0x1, drvdata->base + WDT_TIMER); + writel(0x1, drvdata->base + WDT_SET); + + return 0; +} + static const struct watchdog_info ls1x_wdt_info = { .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "Loongson1 Watchdog", @@ -77,6 +93,7 @@ static const struct watchdog_ops ls1x_wdt_ops = { .stop = ls1x_wdt_stop, .ping = ls1x_wdt_ping, .set_timeout = ls1x_wdt_set_timeout, + .restart = ls1x_wdt_restart, }; static int ls1x_wdt_probe(struct platform_device *pdev) -- cgit v1.2.3