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sierra: disable CPOL in the EM7345

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Using CPOL? in the EM7345 (firmware FIH7160_V1.1_MODEM_01.1349.12)
ends up with the whole AT port stuck and non-responsive, which leads
to flagging the modem as unusable later on as soon as 10 consecutive
AT command timeouts happen.

In order to avoid that, we explicitly disable all CPOL based features
in this specific module.

Fixes https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/336
This commit is contained in:
Aleksander Morgado
2021-03-12 10:33:07 +01:00
parent e0a6d5d76b
commit abc417f37a
1 changed files with 3 additions and 0 deletions
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3
plugins/sierra/77-mm-sierra.rules
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@@ -10,6 +10,9 @@ SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}=="?*", ENV{.MM_USBIFNUM}="$attr{bInte
# Netgear AC341U: enable connection status polling explicitly
ATTRS{idVendor}=="1199", ATTRS{idProduct}=="9057", ENV{ID_MM_QMI_CONNECTION_STATUS_POLLING_ENABLE}="1"
# EM7345: disable CPOL based features
ATTRS{idVendor}=="1199", ATTRS{idProduct}=="a001", ENV{ID_MM_PREFERRED_NETWORKS_CPOL_DISABLED}="1"
# MC74XX: Add port hints
# if 03: primary port
# if 02: raw NMEA port