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This driver implements poweroff/reboot support for T-Head TH1520 SoCs running the AON firmware by sending a message to the AON firmware's WDG part. This is a auxiliary device driver, and expects the AON channel to be passed via the platform_data of the auxiliary device. Signed-off-by: Icenowy Zheng <uwu@icenowy.me> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>