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ram: add ddr4 dual x8 configuration

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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@aspeedtech.com>
Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
This commit is contained in:
Dylan Hung 2020-09-07 16:25:07 +08:00 • committed by Tom Rini
parent 5d457f8057
commit 0474050d46
3 changed files with 12 additions and 1 deletions
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1
drivers/ram/Kconfig
View file

@ -73,6 +73,7 @@ config IMXRT_SDRAM
to support external memories like sdram, psram & nand.
This driver is for the sdram memory interface with the SEMC.
source "drivers/ram/aspeed/Kconfig"
source "drivers/ram/rockchip/Kconfig"
source "drivers/ram/sifive/Kconfig"
source "drivers/ram/stm32mp1/Kconfig"

10
drivers/ram/aspeed/Kconfig Normal file
View file

@ -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

2
drivers/ram/aspeed/sdram_ast2500.c
View file

@ -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;