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This watchdog driver applies to the following mcf families: - mcf52x2 (5271 5275 5282) - mcf532x (5329 5373) - mcf523x (5235) Cpu's not listed for each family does not have WDT module. Note, after some attempts testing by qemu on 5208 i finally abandoned, watchdog seems not implemented properly. The driver has been tested in a real M5282EVM. Signed-off-by: Angelo Dureghello <angelo@kernel-space.org> --- Changes for v2: - remove unnecessary hardcoded timeouts - remove unnecessary hw_watchdog_xxx stuff - rewrite wdog module reg calculation - using IS_ENABLED() where possible Changes for v3: - remove hardcoded 4s test