I'm working on a custom Android build for flo device (Nexus 7) and face 
with a problem of spontaneous reboots.
Last boot reason is "Watchdog"  in these cases.
Hence, I'm trying to understand watchdog internals in Android kernel.

Linux documentation states that all watchdog drivers support a basic 
interface when /dev/watchdog is opened and some data is written there.
However, Nexus 7 does not have /dev/watchdog file.
Does anybody know how watchdog is implemented in flo and who invokes "ping 
calls" on it?
Thanks.

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