We've seen some issues with the x530 under extreme conditions where the DDR gets into a bad state. Generally this results in an application crash followed by a lock-up in u-boot.
Enabling the watchdog prevents the lock up and will let the DDR training have another go. Sometimes this recovers but even a reboot loop is better than a complete lockup.
Changes in v4: - use DIV_ROUND_UP to avoid setting the timeout to 0.
Changes in v3: - new - specify timeout in milliseconds
Changes in v2: - update commit message
Chris Packham (3): watchdog: orion_wdt: support SPL usage watchdog: orion_wdt: take timeout value in ms arm: mvebu: x530: Enable watchdog in SPL and U-Boot
arch/arm/dts/armada-385-atl-x530-u-boot.dtsi | 4 ++ board/CZ.NIC/turris_omnia/turris_omnia.c | 2 +- board/alliedtelesis/x530/x530.c | 48 ++++++++++++++++++++ configs/x530_defconfig | 5 ++ drivers/watchdog/Kconfig | 1 + drivers/watchdog/orion_wdt.c | 27 ++++++++--- 6 files changed, 79 insertions(+), 8 deletions(-)