Some Sierra modems (e.g. MC7710) will report LTE-specific supported modes in the
AT+WS46=? reply, but not +CLTE capability in the AT+GCAP reply:
AT+GCAP
+GCAP: +CGSM
OK
AT+WS46=?
+WS46: (12,22,25,28,29)
OK
This is the port to git master of the following commit:
commit e0242b4db7fb1556e79f6829d22edf411f9f6ba4
Author: Dan Williams <dcbw@redhat.com>
Date: Thu Aug 23 21:14:38 2012 -0500
sierra: fix detection of APP1 port
The APP1 port (which has a limited AT parser) doesn't prefix
its replies with <CR><LF> like nice modems do, and that means
it runs afoul of the echo removal bits of the AT serial port
code. We need to parse the whole string even though it's not
prefixed properly to find the APP1 string in the response.
Some sierra modems (e.g. MC7710) have a secondary port that likes to reply OK
to any AT command passed. Detect that as soon as possible, and don't consider
the Icera port probing result from that secondary port.
Different ports of the same modem may get handled by different drivers. We
therefore need to provide a list of drivers (new `Modem.Drivers' property with
signature 'as') instead of just one (removed `Modem.Driver' property with
signature 's').
$ sudo mmcli -m 0 | grep drivers
| drivers: 'qcserial, qmi_wwan'
Aleksander Morgado