u-boot.git/drivers/ram/aspeed/Makefile, branch master

ram: aspeed: add SDRAM controller driver for AST2700

2026-06-29T19:43:21Z

Add a SDRAM controller driver for the AST2700, derived from the existing AST2700 controller code used by the Ibex SPL but adapted to run from ARM U-Boot proper on the Cortex-A35 cores. The DDR4/DDR5 controller and its DesignWare PHY are programmed by the Ibex SPL before ARM U-Boot proper takes over. This driver reads back the configuration left by the SPL, probes the controller, and exposes ram_info (base and size, with the VGA carve-out subtracted) via UCLASS_RAM so that dram_init() can populate gd->ram_size. The PHY firmware-load entry points (dwc_ddrphy_phyinit_userCustom_*) are kept compiled but call a __weak fmc_hdr_get_prebuilt() stub when ARM U-Boot proper is the caller; the real implementation is provided by the Ibex SPL via the same fmc_hdr.h descriptor format (here added for the ARM build). Adds the supporting register-layout headers under arch/arm/include/asm/arch-aspeed/: - sdram.h: SDRAM controller and DWC PHY register definitions - scu.h: SCU bits referenced by the SDRAM driver - fmc_hdr.h: prebuilt-blob descriptor (binary-compatible with arch/riscv/include/asm/arch-ast2700/fmc_hdr.h used by the Ibex SPL) Signed-off-by: Ryan Chen

ram: ast2700: Add DRAM controller initialization

2024-09-11T12:35:03Z

Add driver for AST2700 to initialize DRAM in SPL. This patch also refactors the Kconfig dependency of Aspeed DRAM drivers as some of them are shared among the file structures of RV and ARM ISAs. Signed-off-by: Chia-Wei Wang Acked-by: Leo Yu-Chi Liang

ram: aspeed: Add AST2600 DRAM control support

2021-01-18T20:19:15Z

AST2600 supports DDR4 SDRAM with maximum speed DDR4-1600. The DDR4 DRAM types including 128MbX16 (2Gb), 256MbX16 (4Gb), 512MbX16 (8Gb), 1GbX16 (16Gb), and 1GbX8 TwinDie (16Gb) are supported. Signed-off-by: Dylan Hung Signed-off-by: Chia-Wei, Wang Reviewed-by: Ryan Chen

ram: move aspeed ram driver into drivers/ directory

2020-10-08T14:58:33Z

to improve the maintainability. It is more easier to modify and add configurations of the driver in the centralized ram driver directory. Signed-off-by: Dylan Hung Reviewed-by: Ryan Chen