mmc: uniphier: add driver for UniPhier SD/MMC host controller

Add a driver for the on-chip SD/eMMC host controller used by
UniPhier SoC family.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

doc/README.uniphier

@@ -93,6 +93,7 @@ Supported devices
 
  - UART (on-chip)
  - NAND
+ - SD/eMMC
  - USB 2.0 (EHCI)
  - USB 3.0 (xHCI)
  - GPIO

drivers/mmc/Kconfig

@@ -43,4 +43,10 @@ config ZYNQ_SDHCI
 	help
 	  Support for Arasan SDHCI host controller on Zynq/ZynqMP ARM SoCs platform
 
+config MMC_UNIPHIER
+	bool "UniPhier SD/MMC Host Controller support"
+	depends on ARCH_UNIPHIER
+	help
+	  This selects support for the SD/MMC Host Controller on UniPhier SoCs.
+
 endmenu

drivers/mmc/Makefile

@@ -41,6 +41,7 @@ obj-$(CONFIG_SH_SDHI) += sh_sdhi.o
 obj-$(CONFIG_SOCFPGA_DWMMC) += socfpga_dw_mmc.o
 obj-$(CONFIG_SPEAR_SDHCI) += spear_sdhci.o
 obj-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
+obj-$(CONFIG_MMC_UNIPHIER) += uniphier-sd.o
 obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
 
 ifdef CONFIG_SPL_BUILD