USB: qcaux: driver for auxiliary serial ports on Qualcomm devices

qcaux: add driver for QCDM-capable ports on various devices

Many Qualcomm-based devices provide a CDC-ACM port which accepts
normal AT commands and PPP connections.  But they only provide one
which makes status or signal strength requests impossible while
PPP is active.  They also provide secondary USB interfaces that
talk the Qualcomm Diagnostic Monitor (QCDM) protocol which can be
used for status and strength.  Make those QCDM ports accessible.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig
index d9f289ca2bda..c78b255e3f83 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -472,6 +472,17 @@ config USB_SERIAL_OTI6858
           To compile this driver as a module, choose M here: the
           module will be called oti6858.
 
+config USB_SERIAL_QCAUX
+        tristate "USB Qualcomm Auxiliary Serial Port Driver"
+        ---help---
+          Say Y here if you want to use the auxiliary serial ports provided
+          by many modems based on Qualcomm chipsets.  These ports often use
+          a proprietary protocol called DM and cannot be used for AT- or
+          PPP-based communication.
+
+          To compile this driver as a module, choose M here: the
+          module will be called moto_modem.  If unsure, choose N.
+
 config USB_SERIAL_QUALCOMM
         tristate "USB Qualcomm Serial modem"
         help