USB: usbserial: mos7720: add support for parallel port on moschip 7715

Add support for the parallel port on the moschip MCS7715 device.  The port
registers itself with the parport subsystem as a low-level driver.  A separate
entry to the kernel configuration is added beneath that for the mos7720, to
avoid the need to link with the parport subsystem code for users who don't have
or don't want the parallel port.  Only compatibility mode is currently supported
(no ECP/EPP).  Tested with both moschip devices (7720 and 7715) on UP and SMP
hosts, including regression testing of serial port, concurrent operation of
serial and parallel ports, and various connect / disconnect scenarios.

Signed-off-by: Mike Dunn <mikedunn@newsguy.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 efb6dc7aa450..a0b2247eeaa1 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -425,6 +425,17 @@ config USB_SERIAL_MOS7720
 	  To compile this driver as a module, choose M here: the
 	  module will be called mos7720.
 
+if USB_SERIAL_MOS7720
+config USB_SERIAL_MOS7715_PARPORT
+	bool "Support for parallel port on the Moschip 7715"
+	select PARPORT_NOT_PC
+	depends on PARPORT
+	---help---
+	Say Y if you have a Moschip 7715 device and would like to use
+	the parallel port it provides.  The port will register with
+	the parport subsystem as a low-level driver.
+endif
+
 config USB_SERIAL_MOS7840
 	tristate "USB Moschip 7840/7820 USB Serial Driver"
 	---help---