net: broadcom: bcm4908enet: add BCM4908 controller driver

BCM4908 SoCs family uses Ethernel controller that includes UniMAC but
uses different DMA engine (than other controllers) and requires
different programming.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -3445,6 +3445,15 @@ F:	Documentation/devicetree/bindings/mips/brcm/
 F:	arch/mips/bcm47xx/*
 F:	arch/mips/include/asm/mach-bcm47xx/*
 
+BROADCOM BCM4908 ETHERNET DRIVER
+M:	Rafał Miłecki <rafal@milecki.pl>
+M:	bcm-kernel-feedback-list@broadcom.com
+L:	netdev@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/net/brcm,bcm4908enet.yaml
+F:	drivers/net/ethernet/broadcom/bcm4908enet.*
+F:	drivers/net/ethernet/broadcom/unimac.h
+
 BROADCOM BCM5301X ARM ARCHITECTURE
 M:	Hauke Mehrtens <hauke@hauke-m.de>
 M:	Rafał Miłecki <zajec5@gmail.com>

drivers/net/ethernet/broadcom/Kconfig

@@ -51,6 +51,14 @@ config B44_PCI
 	depends on B44_PCI_AUTOSELECT && B44_PCICORE_AUTOSELECT
 	default y
 
+config BCM4908ENET
+	tristate "Broadcom BCM4908 internal mac support"
+	depends on ARCH_BCM4908 || COMPILE_TEST
+	default y
+	help
+	  This driver supports Ethernet controller integrated into Broadcom
+	  BCM4908 family SoCs.
+
 config BCM63XX_ENET
 	tristate "Broadcom 63xx internal mac support"
 	depends on BCM63XX

drivers/net/ethernet/broadcom/Makefile

@@ -4,6 +4,7 @@
 #
 
 obj-$(CONFIG_B44) += b44.o
+obj-$(CONFIG_BCM4908ENET) += bcm4908enet.o
 obj-$(CONFIG_BCM63XX_ENET) += bcm63xx_enet.o
 obj-$(CONFIG_BCMGENET) += genet/
 obj-$(CONFIG_BNX2) += bnx2.o