config TEGRA_MC bool "NVIDIA Tegra Memory Controller support" default y depends on ARCH_TEGRA help This driver supports the Memory Controller (MC) hardware found on NVIDIA Tegra SoCs. config TEGRA124_EMC bool "NVIDIA Tegra124 External Memory Controller driver" default y depends on TEGRA_MC && ARCH_TEGRA_124_SOC help This driver is for the External Memory Controller (EMC) found on Tegra124 chips. The EMC controls the external DRAM on the board. This driver is required to change memory timings / clock rate for external memory.