add xr_usb_serial_common driver for USB to RS-485/RS-422

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

libs/xr_usb_serial_common/Makefile

@@ -0,0 +1,41 @@
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=usb-serial-xr_usb_serial_common
+PKG_VERSION:=1a
+PKG_RELEASE=1
+
+PKG_LICENSE:=GPLv2
+PKG_LICENSE_FILES:=
+
+PKG_SOURCE_URL:=https://github.com/kasbert/epsolar-tracer
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE_VERSION:=8c21f4afdfd6acd77b6adad59a4dabe5cbf2b947
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
+
+PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define KernelPackage/usb-serial-xr_usb_serial_common
+	SECTION:=kernel
+	CATEGORY:=Kernel modules
+	SUBMENU:=USB Support
+	TITLE:=Support for Exar USB to RS-485/RS-422
+	URL:=https://www.exar.com/content/document.ashx?id=21651
+	FILES:=$(PKG_BUILD_DIR)/xr_usb_serial_common-1a/xr_usb_serial_common.$(LINUX_KMOD_SUFFIX)
+	AUTOLOAD:=$(call AutoProbe,xr_usb_serial_common)
+	DEPENDS+=kmod-usb-serial
+endef
+
+define Build/Compile
+	+$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
+		ARCH="$(LINUX_KARCH)" \
+		CROSS_COMPILE="$(TARGET_CROSS)" \
+		SUBDIRS="$(PKG_BUILD_DIR)/xr_usb_serial_common-1a" \
+		modules
+endef
+
+$(eval $(call KernelPackage,usb-serial-xr_usb_serial_common))