memory: tegra: Add Tegra114 EMC driver

Introduce driver for the External Memory Controller (EMC) found in
Tegra114 SoC. It 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: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Link: https://patch.msgid.link/20260427070312.81679-5-clamor95@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

drivers/memory/tegra/Kconfig

@@ -37,6 +37,19 @@ config TEGRA30_EMC
 	  This driver is required to change memory timings / clock rate for
 	  external memory.
 
+config TEGRA114_EMC
+	tristate "NVIDIA Tegra114 External Memory Controller driver"
+	default ARCH_TEGRA_114_SOC
+	depends on ARCH_TEGRA_114_SOC || COMPILE_TEST
+	select TEGRA124_CLK_EMC if ARCH_TEGRA
+	select PM_OPP
+	select TEGRA_EMC_COMMON
+	help
+	  This driver is for the External Memory Controller (EMC) found on
+	  Tegra114 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
 	tristate "NVIDIA Tegra124 External Memory Controller driver"
 	default ARCH_TEGRA_124_SOC

drivers/memory/tegra/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_TEGRA_MC) += tegra-mc.o
 obj-$(CONFIG_TEGRA_EMC_COMMON) += tegra-emc-common.o
 obj-$(CONFIG_TEGRA20_EMC)  += tegra20-emc.o
 obj-$(CONFIG_TEGRA30_EMC)  += tegra30-emc.o
+obj-$(CONFIG_TEGRA114_EMC) += tegra114-emc.o
 obj-$(CONFIG_TEGRA124_EMC) += tegra124-emc.o
 obj-$(CONFIG_TEGRA210_EMC_TABLE) += tegra210-emc-table.o
 obj-$(CONFIG_TEGRA210_EMC) += tegra210-emc.o