can: usb: PEAK-System Technik USB adapters driver core

This patch adds the core of the peak_usb driver which handles PEAK-System
Technik PCAN USB adapters. It defines the parts which are common to the
PCAN-USB adapters: can network interfaces management, network-to/from-usb
data path interface, timestamps management...

Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/usb/Kconfig

@@ -13,4 +13,10 @@ config CAN_ESD_USB2
           This driver supports the CAN-USB/2 interface
           from esd electronic system design gmbh (http://www.esd.eu).
 
+config CAN_PEAK_USB
+	tristate "PEAK PCAN-USB/USB Pro interfaces"
+	---help---
+	  This driver supports the PCAN-USB and PCAN-USB Pro adapters
+	  from PEAK-System Technik (http://www.peak-system.com).
+
 endmenu

drivers/net/can/usb/Makefile

@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_CAN_EMS_USB) += ems_usb.o
 obj-$(CONFIG_CAN_ESD_USB2) += esd_usb2.o
+obj-$(CONFIG_CAN_PEAK_USB) += peak_usb/
 
 ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG

drivers/net/can/usb/peak_usb/Makefile

@@ -0,0 +1,2 @@
+obj-$(CONFIG_CAN_PEAK_USB) += peak_usb.o
+peak_usb-y = pcan_usb_core.o