'fastboot boot' hands off cleanly (OKAY / booting) and the device then resets - classic unpetted APSS watchdog. sm8550.dtsi at 6.13-rc3 has no watchdog node; add it for rtwo so qcom_wdt binds and keeps it fed. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QF5HebjUsRaxbW4cBX6HJP