[PATCH] fix-pm-gsm-disable-serial-drive-when-off.patch

[Andy Green]

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Somebody in the thread at some point said:

|> A reliable way is to wait till the AT
|> command interpreter tells it is ready, but this requires a more
|> complicated way to check.
|
| Hmm, this would require user space (i.e., the middleware) to
| take care of the GSM setup business. If Mickey wants this task,
| I won't stand in his way :-)

How would you stand in his way anyway? :-)

Practically this stays at 1s until something better comes along... I
guess the semantic here is the /sys blocks until "the modem is ON and
ready for a new command".  That sounds pretty fine.

One day or maybe already GSM init will be async to the main boot path
and we don't really care then.

- -Andy
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