summaryrefslogtreecommitdiff
path: root/drivers/watchdog/dw_wdt.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/watchdog/dw_wdt.c')
-rw-r--r--drivers/watchdog/dw_wdt.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
index fef7c61f5555..fba21de2bbad 100644
--- a/drivers/watchdog/dw_wdt.c
+++ b/drivers/watchdog/dw_wdt.c
@@ -114,7 +114,15 @@ static int dw_wdt_set_timeout(struct watchdog_device *wdd, unsigned int top_s)
writel(top_val | top_val << WDOG_TIMEOUT_RANGE_TOPINIT_SHIFT,
dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET);
- wdd->timeout = dw_wdt_top_in_seconds(dw_wdt, top_val);
+ /*
+ * In case users set bigger timeout value than HW can support,
+ * kernel(watchdog_dev.c) helps to feed watchdog before
+ * wdd->max_hw_heartbeat_ms
+ */
+ if (top_s * 1000 <= wdd->max_hw_heartbeat_ms)
+ wdd->timeout = dw_wdt_top_in_seconds(dw_wdt, top_val);
+ else
+ wdd->timeout = top_s;
return 0;
}
@@ -135,6 +143,7 @@ static int dw_wdt_start(struct watchdog_device *wdd)
struct dw_wdt *dw_wdt = to_dw_wdt(wdd);
dw_wdt_set_timeout(wdd, wdd->timeout);
+ dw_wdt_ping(&dw_wdt->wdd);
dw_wdt_arm_system_reset(dw_wdt);
return 0;