Experimental support for a new CVA6-CHERI platform

arch/riscv/configs/capltd_cva6_cheri_genesys2_defconfig

@@ -0,0 +1,39 @@
+CONFIG_DEFAULT_HOSTNAME="cva6-cheri"
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_HZ_100=y
+CONFIG_CMDLINE="earlycon console=ttyS0,115200n8"
+# CONFIG_GCC_PLUGINS is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_NETDEVICES=y
+CONFIG_LOWRISC_DIGILENT_100MHZ=y
+CONFIG_MDIO_BITBANG=y
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_SPI=y
+CONFIG_SPI_XILINX=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_XILINX=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_GPIO_RESTART=y
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+CONFIG_LEDS_TRIGGER_PANIC=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_TMPFS=y
+CONFIG_PRINTK_TIME=y
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_DEBUG_SECTION_MISMATCH=y

drivers/net/ethernet/Kconfig

@@ -120,6 +120,7 @@ config LANTIQ_XRX200
 
 source "drivers/net/ethernet/adi/Kconfig"
 source "drivers/net/ethernet/litex/Kconfig"
+source "drivers/net/ethernet/lowrisc/Kconfig"
 source "drivers/net/ethernet/marvell/Kconfig"
 source "drivers/net/ethernet/mediatek/Kconfig"
 source "drivers/net/ethernet/mellanox/Kconfig"

drivers/net/ethernet/Makefile

@@ -57,6 +57,7 @@ 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-$(CONFIG_NET_VENDOR_LOWRISC) += lowrisc/
 obj-$(CONFIG_NET_VENDOR_MARVELL) += marvell/
 obj-$(CONFIG_NET_VENDOR_MEDIATEK) += mediatek/
 obj-$(CONFIG_NET_VENDOR_MELLANOX) += mellanox/

drivers/net/ethernet/lowrisc/Kconfig

@@ -0,0 +1,26 @@
+#
+# Xilink device configuration
+#
+
+config NET_VENDOR_LOWRISC
+	bool "Lowrisc devices"
+	default y
+	depends on RISCV
+	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 Lowrisc devices. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_LOWRISC
+
+config LOWRISC_DIGILENT_100MHZ
+	tristate "Lowrisc 100MHz Ethernet Nexys4_DDR support"
+	depends on RISCV
+	select PHYLIB
+	help
+	  This driver supports the 100MHz Ethernet for Nexys4_DDR Digilent boards from Lowrisc.
+
+endif # NET_VENDOR_LOWRISC

drivers/net/ethernet/lowrisc/Makefile

@@ -0,0 +1,6 @@
+#
+# Makefile for the Lowrisc network device driver.
+#
+
+obj-$(CONFIG_LOWRISC_DIGILENT_100MHZ) += lowrisc_100MHz.o
+CFLAGS_lowrisc_100MHz.o := -DDEBUG