armv7R: K3: j721e: Add support for triggering ddr init from SPL

In SPL, DDR should be made available by the end of board_init_f()
so that apis in board_init_r() can use ddr. Adding support for
triggering DDR initialization from board_init_f().

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

arch/arm/mach-k3/j721e_init.c

@@ -73,7 +73,7 @@ static void store_boot_index_from_rom(void)
 
 void board_init_f(ulong dummy)
 {
-#if defined(CONFIG_K3_LOAD_SYSFW)
+#if defined(CONFIG_K3_J721E_DDRSS) || defined(CONFIG_K3_LOAD_SYSFW)
 	struct udevice *dev;
 	int ret;
 #endif
@@ -117,6 +117,12 @@ void board_init_f(ulong dummy)
 	/* Prepare console output */
 	preloader_console_init();
 #endif
+
+#if defined(CONFIG_K3_J721E_DDRSS)
+	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (ret)
+		panic("DRAM init failed: %d\n", ret);
+#endif
 }
 
 u32 spl_boot_mode(const u32 boot_device)

board/ti/j721e/Kconfig

@@ -21,6 +21,7 @@ config TARGET_J721E_R5_EVM
 	select K3_LOAD_SYSFW
 	select RAM
 	select SPL_RAM
+	select K3_J721E_DDRSS
 	imply SYS_K3_SPL_ATF
 
 endchoice