u-boot/drivers/ram/aspeed/Kconfig

if RAM || SPL_RAM

config ASPEED_DDR4_DUALX8
	bool "Enable Dual X8 DDR4 die"
	depends on DM && OF_CONTROL && ARCH_ASPEED
	help
		Say Y if dual X8 DDR4 die is used on the board.  The aspeed ddr sdram
		controller needs to know if the memory chip mounted on the board is dual
		 x8 die or not.  Or it may get the wrong size of the memory space.

if ASPEED_AST2600

choice
	prompt "DDR4 target date rate"
	default ASPEED_DDR4_1600

config ASPEED_DDR4_400
	bool "DDR4 targets at 400Mbps"
	depends on DM && OF_CONTROL && ARCH_ASPEED
	help
	  select DDR4 target data rate at 400M

config ASPEED_DDR4_800
	bool "DDR4 targets at 800Mbps"
	depends on DM && OF_CONTROL && ARCH_ASPEED
	help
	  select DDR4 target data rate at 800M

config ASPEED_DDR4_1333
	bool "DDR4 targets at 1333Mbps"
	depends on DM && OF_CONTROL && ARCH_ASPEED
	help
	  select DDR4 target data rate at 1333M

config ASPEED_DDR4_1600
	bool "DDR4 targets at 1600Mbps"
	depends on DM && OF_CONTROL && ARCH_ASPEED
	help
	  select DDR4 target data rate at 1600M
endchoice

config ASPEED_BYPASS_SELFTEST
	bool "bypass self test during DRAM initialization"
	help
	  Say Y here to bypass DRAM self test to speed up the boot time

config ASPEED_ECC
	bool "aspeed SDRAM error correcting code"
	depends on DM && OF_CONTROL && ARCH_ASPEED
	help
	  enable SDRAM ECC function

if ASPEED_ECC
config ASPEED_ECC_SIZE
	int "ECC size: 0=driver auto-caluated"
	depends on ASPEED_ECC
	default 0
	help
	  SDRAM size with the error correcting code enabled. The unit is
	  in Megabytes.  Noted that only the 8/9 of the configured size
	  can be used by the system.  The remaining 1/9 will be used by
	  the ECC engine.  If the size is set to 0, the sdram driver will
	  calculate the SDRAM size and set the whole range be ECC enabled.
endif # end of ASPEED_ECC
endif # end of ASPEED_AST2600
endif # end of RAM || SPL_RAM