net: Driver for LiteETH network interface

Co-developed-by: David Shah <dave@ds0.me>
Co-developed-by: Gabriel Somlo <gsomlo@gmail.com>
Signed-off-by: David Shah <dave@ds0.me>
Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

drivers/net/ethernet/Kconfig

@@ -116,6 +116,7 @@ config LANTIQ_XRX200
 	  Support for the PMAC of the Gigabit switch (GSWIP) inside the
 	  Lantiq / Intel VRX200 VDSL SoC
 
+source "drivers/net/ethernet/litex/Kconfig"
 source "drivers/net/ethernet/marvell/Kconfig"
 source "drivers/net/ethernet/mediatek/Kconfig"
 source "drivers/net/ethernet/mellanox/Kconfig"

drivers/net/ethernet/Makefile

@@ -50,6 +50,7 @@ obj-$(CONFIG_JME) += jme.o
 obj-$(CONFIG_KORINA) += korina.o
 obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o
 obj-$(CONFIG_LANTIQ_XRX200) += lantiq_xrx200.o
+obj-$(CONFIG_NET_VENDOR_LITEX) += litex/
 obj-$(CONFIG_NET_VENDOR_MARVELL) += marvell/
 obj-$(CONFIG_NET_VENDOR_MEDIATEK) += mediatek/
 obj-$(CONFIG_NET_VENDOR_MELLANOX) += mellanox/

drivers/net/ethernet/litex/Kconfig

@@ -0,0 +1,28 @@
+#
+# LiteX device configuration
+#
+
+config NET_VENDOR_LITEX
+	bool "LiteX devices"
+	default y
+	help
+	  If you have a network (Ethernet) card belonging to this class, say Y.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about LiteX devices. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_LITEX
+
+config LITEX_LITEETH
+	tristate "LiteX Ethernet support"
+	depends on LITEX_SOC_CONTROLLER
+	select NET_CORE
+	select MII
+	select PHYLIB
+	help
+	  If you wish to compile a kernel for hardware with a LiteX LiteEth
+	  device then you should answer Y to this.
+
+endif # NET_VENDOR_LITEX

drivers/net/ethernet/litex/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for the LiteX network device drivers.
+#
+
+obj-$(CONFIG_LITEX_LITEETH) += litex_liteeth.o