From 081574f76d010532ff406d682f532ac410559a3b Mon Sep 17 00:00:00 2001 From: Vladimir Panteleev <git@vladimir.panteleev.md> Date: Tue, 20 Sep 2022 09:27:21 +0000 Subject: watchdog: sp5100_tco: Add "action" module parameter Allow configuring the "action" bit, as documented in [1]. Previously, the only action supported by this module was to reset the system (0). It can now be configured to power off (1) instead. [1]: https://www.amd.com/system/files/TechDocs/44413.pdf Signed-off-by: Vladimir Panteleev <git@vladimir.panteleev.md> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20220920092721.7686-1-git@vladimir.panteleev.md Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org> --- drivers/watchdog/sp5100_tco.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'drivers/watchdog') diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c index ae54dd33e233..fb426b7d81da 100644 --- a/drivers/watchdog/sp5100_tco.c +++ b/drivers/watchdog/sp5100_tco.c @@ -65,6 +65,12 @@ static struct pci_dev *sp5100_tco_pci; /* module parameters */ +#define WATCHDOG_ACTION 0 +static bool action = WATCHDOG_ACTION; +module_param(action, bool, 0); +MODULE_PARM_DESC(action, "Action taken when watchdog expires, 0 to reset, 1 to poweroff (default=" + __MODULE_STRING(WATCHDOG_ACTION) ")"); + #define WATCHDOG_HEARTBEAT 60 /* 60 sec default heartbeat. */ static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */ module_param(heartbeat, int, 0); @@ -297,8 +303,11 @@ static int sp5100_tco_timer_init(struct sp5100_tco *tco) if (val & SP5100_WDT_FIRED) wdd->bootstatus = WDIOF_CARDRESET; - /* Set watchdog action to reset the system */ - val &= ~SP5100_WDT_ACTION_RESET; + /* Set watchdog action */ + if (action) + val |= SP5100_WDT_ACTION_RESET; + else + val &= ~SP5100_WDT_ACTION_RESET; writel(val, SP5100_WDT_CONTROL(tco->tcobase)); /* Set a reasonable heartbeat before we stop the timer */ -- cgit