SIM7100E

[Yegor Yefremov]

I have a problem with SIM7100E. Though kernel creates wwan0 device, it
is not visible in ModemManager.

# mmcli -m 5

/org/freedesktop/ModemManager1/Modem/5 (device id
'3c942a37f458697974838e1226b26ded4c5644d6')
  -------------------------
  Hardware |   manufacturer: 'SIMCOM INCORPORATED'
           |          model: 'SIMCOM_SIM7100E'
           |       revision: '4534B03SIM7100E'
           |      supported: 'gsm-umts, lte'
           |        current: 'gsm-umts, lte'
           |   equipment id: '866802020078228'
  -------------------------
  System   |         device:
'/sys/devices/platform/44000000.ocp/4a064000.usbhshost/4a064c00.ehci/usb1/1-1/1-1.2'
           |        drivers: 'qmi_wwan, option1'
           |         plugin: 'SimTech'
           |   primary port: 'ttyUSB2'
           |          ports: 'ttyUSB0 (qcdm), ttyUSB2 (at), ttyUSB3 (at)'
  -------------------------
  Numbers  |           own : '+491781364987'
  -------------------------
  Status   |           lock: 'none'
           | unlock retries: 'unknown'
           |          state: 'disabled'
           |    power state: 'on'
           |    access tech: 'unknown'
           | signal quality: '0' (cached)
  -------------------------
  Modes    |      supported: 'allowed: 2g; preferred: none
           |                  allowed: 3g; preferred: none
           |                  allowed: 2g, 3g; preferred: none
           |                  allowed: 2g, 3g; preferred: 2g
           |                  allowed: 2g, 3g; preferred: 3g
           |                  allowed: 2g, 3g, 4g; preferred: none'
           |        current: 'allowed: any; preferred: none'
  -------------------------
  Bands    |      supported: 'unknown'
           |        current: 'unknown'
  -------------------------
  IP       |      supported: 'ipv4, ipv6, ipv4v6'
  -------------------------
  3GPP     |           imei: '866802020078228'
           |  enabled locks: 'none'
           |    operator id: 'unknown'
           |  operator name: 'unknown'
           |   subscription: 'unknown'
           |   registration: 'unknown'
  -------------------------
  SIM      |           path: '/org/freedesktop/ModemManager1/SIM/2'

  -------------------------
  Bearers  |          paths: 'none'

If I unload option driver and restart MM, then it sees wwan0 interface
and I can connect and get IP via DHCP.

I've attached MM's debug log.

This commit added SIM7100E [1]

[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/usb/serial/option.c?id=3158a8d416f4e1b79dcc867d67cb50013140772c

Yegor
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