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memory: tegra: Introduce Tegra20 EMC driver

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Introduce driver for the External Memory Controller (EMC) found on Tegra20
chips, which controls the external DRAM on the board. The purpose of this
driver is to program memory timing for external memory on the EMC clock
rate change.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Dmitry Osipenko
2018-10-21 21:30:52 +03:00
committed by Thierry Reding
parent 651022382c
commit 96e5da7c84
3 changed files with 602 additions and 0 deletions
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10
drivers/memory/tegra/Kconfig
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@@ -6,6 +6,16 @@ config TEGRA_MC
This driver supports the Memory Controller (MC) hardware found on
NVIDIA Tegra SoCs.
config TEGRA20_EMC
bool "NVIDIA Tegra20 External Memory Controller driver"
default y
depends on ARCH_TEGRA_2x_SOC
help
This driver is for the External Memory Controller (EMC) found on
Tegra20 chips. The EMC controls the external DRAM on the board.
This driver is required to change memory timings / clock rate for
external memory.
config TEGRA124_EMC
bool "NVIDIA Tegra124 External Memory Controller driver"
default y

1
drivers/memory/tegra/Makefile
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@@ -10,5 +10,6 @@ tegra-mc-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210.o
obj-$(CONFIG_TEGRA_MC) += tegra-mc.o
obj-$(CONFIG_TEGRA20_EMC) += tegra20-emc.o
obj-$(CONFIG_TEGRA124_EMC) += tegra124-emc.o
obj-$(CONFIG_ARCH_TEGRA_186_SOC) += tegra186.o

591
drivers/memory/tegra/tegra20-emc.c Normal file
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