LiteX: driver for LiteSDCard (litex_mmc)

Original author: Kamil Rakoczy <krakoczy@antmicro.com>
Updated for DMA transfers: Maciej Dudek <mdudek@internships.antmicro.com>
Multiblock xfer, eject, and misc. cleanup: Gabriel Somlo <gsomlo@gmail.com>

Additional fixups and interrupts by Paul Mackerras <paulus@ozlabs.org>

Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
Signed-off-by: Maciej Dudek <mdudek@internships.antmicro.com>
Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

drivers/mmc/host/Kconfig

@@ -1091,3 +1091,9 @@ config MMC_OWL
 
 config MMC_SDHCI_EXTERNAL_DMA
 	bool
+
+config MMC_LITEX
+	tristate "Support for the MMC Controller in LiteX SOCs"
+	depends on OF && LITEX
+	help
+	  Generic MCC driver for LiteX

drivers/mmc/host/Makefile

@@ -102,6 +102,7 @@ obj-$(CONFIG_MMC_CQHCI)			+= cqhci.o
 cqhci-y					+= cqhci-core.o
 cqhci-$(CONFIG_MMC_CRYPTO)		+= cqhci-crypto.o
 obj-$(CONFIG_MMC_HSQ)			+= mmc_hsq.o
+obj-$(CONFIG_MMC_LITEX)			+= litex_mmc.o
 
 ifeq ($(CONFIG_CB710_DEBUG),y)
 	CFLAGS-cb710-mmc	+= -DDEBUG