# SPDX-License-Identifier: GPL-2.0-only # # Memory devices # menuconfig MEMORY bool "Memory Controller drivers" help This option allows to enable specific memory controller drivers, useful mostly on embedded systems. These could be controllers for DRAM (SDR, DDR), ROM, SRAM and others. The drivers features vary from memory tuning and frequency scaling to enabling access to attached peripherals through memory bus. if MEMORY config DDR bool help Data from JEDEC specs for DDR SDRAM memories, particularly the AC timing parameters and addressing information. This data is useful for drivers handling DDR SDRAM controllers. config ARM_PL172_MPMC tristate "ARM PL172 MPMC driver" depends on ARM_AMBA && OF help This selects the ARM PrimeCell PL172 MultiPort Memory Controller. If you have an embedded system with an AMBA bus and a PL172 controller, say Y or M here. config ATMEL_SDRAMC bool "Atmel (Multi-port DDR-)SDRAM Controller" default y if ARCH_AT91 depends on ARCH_AT91 || COMPILE_TEST depends on OF help This driver is for Atmel SDRAM Controller or Atmel Multi-port DDR-SDRAM Controller available on Atmel AT91SAM9 and SAMA5 SoCs. Starting with the at91sam9g45, this controller supports SDR, DDR and LP-DDR memories. config ATMEL_EBI bool "Atmel EBI driver" default y if ARCH_AT91 depends on ARCH_AT91 || COMPILE_TEST depends on OF select MFD_SYSCON select MFD_ATMEL_SMC help Driver for Atmel EBI controller. Used to configure the EBI (external bus interface) when the device- tree is used. This bus supports NANDs, external ethernet controller, SRAMs, ATA devices, etc. config BRCMSTB_DPFE bool "Broadcom STB DPFE driver" if COMPILE_TEST default y if ARCH_BRCMSTB depends on ARCH_BRCMSTB || COMPILE_TEST help This driver provides access to the DPFE interface of Broadcom STB SoCs. The firmware running on the DCPU inside the DDR PHY can provide current information about the system's RAM, for instance the DRAM refresh rate. This can be used as an indirect indicator for the DRAM's temperature. Slower refresh rate means cooler RAM, higher refresh rate means hotter RAM. config BT1_L2_CTL bool "Baikal-T1 CM2 L2-RAM Cache Control Block" depends on MIPS_BAIKAL_T1 || COMPILE_TEST select MFD_SYSCON help Baikal-T1 CPU is based on the MIPS P5600 Warrior IP-core. The CPU resides Coherency Manager v2 with embedded 1MB L2-cache. It's possible to tune the L2 cache performance up by setting the data, tags and way-select latencies of RAM access. This driver provides a dt properties-based and sysfs interface for it. config TI_AEMIF tristate "Texas Instruments AEMIF driver" depends on ARCH_DAVINCI || ARCH_KEYSTONE || COMPILE_TEST depends on OF help This driver is for the AEMIF module available in Texas Instruments SoCs. AEMIF stands for Asynchronous External Memory Interface and is intended to provide a glue-less interface to a variety of asynchronuous memory devices like ASRAM, NOR and NAND memory. A total of 256M bytes of any of these memories can be accessed at a given time via four chip selects with 64M byte access per chip select. config TI_EMIF tristate "Texas Instruments EMIF driver" depends on ARCH_OMAP2PLUS || COMPILE_TEST select DDR help This driver is for the EMIF module available in Texas Instruments SoCs. EMIF is an SDRAM controller that, based on its revision, supports one or more of DDR2, DDR3, and LPDDR2 SDRAM protocols. This driver takes care of only LPDDR2 memories presently. The functions of the driver includes re-configuring AC timing parameters and other settings during frequency, voltage and temperature changes config OMAP_GPMC bool "Texas Instruments OMAP SoC GPMC driver" if COMPILE_TEST depends on OF_ADDRESS select GPIOLIB help This driver is for the General Purpose Memory Controller (GPMC) present on Texas Instruments SoCs (e.g. OMAP2+). GPMC allows interfacing to a variety of asynchronous as well as synchronous memory drives like NOR, NAND, OneNAND, SRAM. config OMAP_GPMC_DEBUG bool "Enable GPMC debug output and skip reset of GPMC during init" depends on OMAP_GPMC help Enables verbose debugging mostly to decode the bootloader provided timings. To preserve the bootloader provided timings, the reset of GPMC is skipped during init. Enable this during development to configure devices connected to the GPMC bus. NOTE: In addition to matching the register setup with the bootloader you also need to match the GPMC FCLK frequency used by the bootloader or else the GPMC timings won't be identical with the bootloader timings. config TI_EMIF_SRAM tristate "Texas Instruments EMIF SRAM driver" depends on SOC_AM33XX || SOC_AM43XX || (ARM && COMPILE_TEST) depends on SRAM help This driver is for the EMIF module available on Texas Instruments AM33XX and AM43XX SoCs and is required for PM. Certain parts of the EMIF PM code must run from on-chip SRAM late in the suspend sequence so this driver provides several relocatable PM functions for the SoC PM code to use. config MVEBU_DEVBUS bool "Marvell EBU Device Bus Controller" default y if PLAT_ORION depends on PLAT_ORION || COMPILE_TEST depends on OF help This driver is for the Device Bus controller available in some Marvell EBU SoCs such as Discovery (mv78xx0), Orion (88f5xxx) and Armada 370 and Armada XP. This controller allows to handle flash devices such as NOR, NAND, SRAM, and FPGA. config FSL_CORENET_CF tristate "Freescale CoreNet Error Reporting" depends on FSL_SOC_BOOKE || COMPILE_TEST help Say Y for reporting of errors from the Freescale CoreNet Coherency Fabric. Errors reported include accesses to physical addresses that mapped by no local access window (LAW) or an invalid LAW, as well as bad cache state that represents a coherency violation. config FSL_IFC bool "Freescale IFC driver" if COMPILE_TEST depends on FSL_SOC || ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST depends on HAS_IOMEM config JZ4780_NEMC bool "Ingenic JZ4780 SoC NEMC driver" depends on MIPS || COMPILE_TEST depends on HAS_IOMEM && OF help This driver is for the NAND/External Memory Controller (NEMC) in the Ingenic JZ4780. This controller is used to handle external memory devices such as NAND and SRAM. config MTK_SMI bool "Mediatek SoC Memory Controller driver" if COMPILE_TEST depends on ARCH_MEDIATEK || COMPILE_TEST help This driver is for the Memory Controller module in MediaTek SoCs, mainly help enable/disable iommu and control the power domain and clocks for each local arbiter. config DA8XX_DDRCTL bool "Texas Instruments da8xx DDR2/mDDR driver" depends on ARCH_DAVINCI_DA8XX || COMPILE_TEST help This driver is for the DDR2/mDDR Memory Controller present on Texas Instruments da8xx SoCs. It's used to tweak various memory controller configuration options. config PL353_SMC tristate "ARM PL35X Static Memory Controller(SMC) driver" default y if ARM depends on ARM depends on ARM_AMBA || COMPILE_TEST help This driver is for the ARM PL351/PL353 Static Memory Controller(SMC) module. config RENESAS_RPCIF tristate "Renesas RPC-IF driver" depends on ARCH_RENESAS || COMPILE_TEST select REGMAP_MMIO help This supports Renesas R-Car Gen3 RPC-IF which provides either SPI host or HyperFlash. You'll have to select individual components under the corresponding menu. config STM32_FMC2_EBI tristate "Support for FMC2 External Bus Interface on STM32MP SoCs" depends on MACH_STM32MP157 || COMPILE_TEST select MFD_SYSCON help Select this option to enable the STM32 FMC2 External Bus Interface controller. This driver configures the transactions with external devices (like SRAM, ethernet adapters, FPGAs, LCD displays, ...) on SOCs containing the FMC2 External Bus Interface. source "drivers/memory/samsung/Kconfig" source "drivers/memory/tegra/Kconfig" endif