memory: Move TI_AEMIF config to KCONFIG

Not all Keystone2 devices has AEMIF NAND controller. So adding Kconfig
entry for CONFIG_TI_AEMIF and enabling it in respective defconfigs on
platforms with AEMIF controller.

Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

board/ti/ks2_evm/board.c

@@ -20,6 +20,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_TI_AEMIF)
 static struct aemif_config aemif_configs[] = {
 	{			/* CS0 */
 		.mode		= AEMIF_MODE_NAND,
@@ -33,6 +34,7 @@ static struct aemif_config aemif_configs[] = {
 		.width		= AEMIF_WIDTH_8,
 	},
 };
+#endif
 
 int dram_init(void)
 {
@@ -42,7 +44,10 @@ int dram_init(void)
 
 	gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
 				    CONFIG_MAX_RAM_BANK_SIZE);
+#if defined(CONFIG_TI_AEMIF)
 	aemif_init(ARRAY_SIZE(aemif_configs), aemif_configs);
+#endif
+
 	if (ddr3_size)
 		ddr3_init_ecc(KS2_DDR3A_EMIF_CTRL_BASE, ddr3_size);
 	return 0;

configs/k2e_evm_defconfig

@@ -15,3 +15,4 @@ CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_DM_ETH=y
 CONFIG_SYS_NS16550=y
+CONFIG_TI_AEMIF=y

configs/k2hk_evm_defconfig

@@ -15,3 +15,4 @@ CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_DM_ETH=y
 CONFIG_SYS_NS16550=y
+CONFIG_TI_AEMIF=y

configs/k2l_evm_defconfig

@@ -15,3 +15,4 @@ CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_DM_ETH=y
 CONFIG_SYS_NS16550=y
+CONFIG_TI_AEMIF=y

drivers/Kconfig

@@ -30,6 +30,8 @@ source "drivers/input/Kconfig"
 
 source "drivers/led/Kconfig"
 
+source "drivers/memory/Kconfig"
+
 source "drivers/misc/Kconfig"
 
 source "drivers/mmc/Kconfig"

drivers/memory/Kconfig

@@ -0,0 +1,18 @@
+#
+# Memory devices
+#
+
+menu "Memory Controller drivers"
+
+config TI_AEMIF
+	tristate "Texas Instruments AEMIF driver"
+	depends on ARCH_KEYSTONE
+	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.
+
+endmenu

include/configs/ti_armv7_keystone2.h

@@ -145,8 +145,6 @@
 /* SerDes */
 #define CONFIG_TI_KEYSTONE_SERDES
 
-/* AEMIF */
-#define CONFIG_TI_AEMIF
 #define CONFIG_AEMIF_CNTRL_BASE		KS2_AEMIF_CNTRL_BASE
 
 /* I2C Configuration */