From: Bjørn Mork <[email protected]>
Date: Fri, 25 May 2018 15:00:20 +0200
> SIMCOM are reusing a single device ID for many (all of their?)
> different modems, based on different chipsets and firmwares. Newer
> Qualcomm chipset generations require setting DTR to wake the QMI
> function. The SIM7600E modem is using such a chipset, making it
> fail to work with this driver despite the device ID match.
>
> Fix by unconditionally enabling the SET_DTR quirk for all SIMCOM
> modems using this specific device ID. This is similar to what
> we already have done for another case of device IDs recycled over
> multiple chipset generations: 14cf4a771b30 ("drivers: net: usb:
> qmi_wwan: add QMI_QUIRK_SET_DTR for Telit PID 0x1201")
>
> Initial testing on an older SIM7100 modem shows no immediate side
> effects.
>
> Reported-by: Sebastian Sjoholm <[email protected]>
> Cc: Reinhard Speyerer <[email protected]>
> Signed-off-by: Bjørn Mork <[email protected]>
Applied.
