watchdog: msc313e: Fix premature reset during timeout update

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Updating the 32-bit hardware timeout requires writing to two 16-bit
registers sequentially.  If the watchdog is actively running, this
non-atomic update might trigger a premature system reset.

Clear the watchdog counter before updating the registers to prevent the
timer from timing out prematurely against an intermediate threshold.

Fixes: e9800b7994 ("watchdog: Add Mstar MSC313e WDT driver")
Cc: stable@vger.kernel.org
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/20260913065126.8350-1-tzungbi@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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Tzung-Bi Shih 2026-09-13 14:51:26 +08:00 • committed by Guenter Roeck

parent 1d9763f34a

commit 22737cfced

1 changed files with 6 additions and 0 deletions

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drivers/watchdog/msc313e_wdt.c

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