[PATCH 2/2] ram: add ddr4 dual x8 configuration

[Dylan Hung]

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.

Signed-off-by: Dylan Hung <dylan_hung at aspeedtech.com>
---
 drivers/ram/Kconfig                |  1 +
 drivers/ram/aspeed/Kconfig         | 10 ++++++++++
 drivers/ram/aspeed/sdram_ast2500.c |  2 +-
 3 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 drivers/ram/aspeed/Kconfig

diff --git a/drivers/ram/Kconfig b/drivers/ram/Kconfig
index 7e6e981897..d277237288 100644
--- a/drivers/ram/Kconfig
+++ b/drivers/ram/Kconfig
@@ -76,3 +76,4 @@ config IMXRT_SDRAM
 source "drivers/ram/rockchip/Kconfig"
 source "drivers/ram/sifive/Kconfig"
 source "drivers/ram/stm32mp1/Kconfig"
+source "drivers/ram/aspeed/Kconfig"
diff --git a/drivers/ram/aspeed/Kconfig b/drivers/ram/aspeed/Kconfig
new file mode 100644
index 0000000000..020c913188
--- /dev/null
+++ b/drivers/ram/aspeed/Kconfig
@@ -0,0 +1,10 @@
+if RAM || SPL_RAM
+config ASPEED_DDR4_DUALX8
+	bool "Enable Dual X8 DDR4 die"
+	depends on DM && OF_CONTROL && ARCH_ASPEED
+	default n
+	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.
+endif
diff --git a/drivers/ram/aspeed/sdram_ast2500.c b/drivers/ram/aspeed/sdram_ast2500.c
index a3adaa8a99..8bfbf562c3 100644
--- a/drivers/ram/aspeed/sdram_ast2500.c
+++ b/drivers/ram/aspeed/sdram_ast2500.c
@@ -247,7 +247,7 @@ static int ast2500_sdrammc_init_ddr4(struct dram_info *info)
 	    | SDRAM_PCR_RESETN_DIS
 	    | SDRAM_PCR_RGAP_CTRL_EN | SDRAM_PCR_ODT_EN | SDRAM_PCR_ODT_EXT_EN;
 	const u32 conf = (SDRAM_CONF_CAP_1024M << SDRAM_CONF_CAP_SHIFT)
-#ifdef CONFIG_DUALX8_RAM
+#ifdef CONFIG_ASPEED_DDR4_DUALX8
 	    | SDRAM_CONF_DUALX8
 #endif
 	    | SDRAM_CONF_SCRAMBLE | SDRAM_CONF_SCRAMBLE_PAT2 | SDRAM_CONF_DDR4;
-- 
2.17.1