memory: ti-aemif: introduce AEMIF driver

Add new AEMIF driver for EMIF16 Texas Instruments controller.
The EMIF16 module is intended to provide a glue-less interface to
a variety of asynchronous memory devices like ASRA M, NOR and NAND
memory. A total of 256M bytes of any of these memories can be
accessed at any given time via 4 chip selects with 64M byte access
per chip select.

Synchronous memories such as DDR1 SD RAM, SDR SDRAM and Mobile SDR
are not supported.

This controller is used on SoCs like Davinci, Keysone2
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/memory/Kconfig

@@ -7,6 +7,17 @@ menuconfig MEMORY
 
 if MEMORY
 
+config TI_AEMIF
+	tristate "Texas Instruments AEMIF driver"
+	depends on (ARCH_DAVINCI || ARCH_KEYSTONE) && 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

drivers/memory/Makefile

@@ -5,6 +5,7 @@
 ifeq ($(CONFIG_DDR),y)
 obj-$(CONFIG_OF)		+= of_memory.o
 endif
+obj-$(CONFIG_TI_AEMIF)		+= ti-aemif.o
 obj-$(CONFIG_TI_EMIF)		+= emif.o
 obj-$(CONFIG_FSL_IFC)		+= fsl_ifc.o
 obj-$(CONFIG_MVEBU_DEVBUS)	+= mvebu-devbus.o