sifive: fu540: add ddr driver
Add driver for fu540 to support ddr initialization in SPL.
This driver is based on FSBL
(https://github.com/sifive/freedom-u540-c000-bootloader.git)
Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/board/sifive/fu540/Kconfig b/board/sifive/fu540/Kconfig
index 4330ac4..d41c305 100644
--- a/board/sifive/fu540/Kconfig
+++ b/board/sifive/fu540/Kconfig
@@ -19,6 +19,8 @@
config BOARD_SPECIFIC_OPTIONS # dummy
def_bool y
select GENERIC_RISCV
+ select RAM
+ select SPL_RAM if SPL
imply CMD_DHCP
imply CMD_EXT2
imply CMD_EXT4