imx8qxp: mek: default enable SPL

Enable SPL for i.MX8QXP MEK, and currently use SPL FIT.
The SPL enable SPL_DM to use MMC/PINCTRL/POWER DOMAIN/CLK.

Note: SPL FIT could not support secure boot chain, because i.MX8/8X
only support i.MX container format. This container format has
not been upstreamed, so we use FIT for now. When SPL container
supported, we could switch to that.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

board/freescale/imx8qxp_mek/Makefile

@@ -5,3 +5,4 @@
 #
 
 obj-y += imx8qxp_mek.o
+obj-$(CONFIG_SPL_BUILD) += spl.o

board/freescale/imx8qxp_mek/imximage.cfg

@@ -19,6 +19,4 @@ CONTAINER
 /* Add scfw image with exec attribute */
 IMAGE SCU mx8qx-mek-scfw-tcm.bin
 /* Add ATF image with exec attribute */
-IMAGE A35 bl31.bin 0x80000000
+IMAGE A35 spl/u-boot-spl.bin 0x00100000
-/* Add U-Boot image with load attribute */
-DATA A35 u-boot-dtb.bin 0x80020000

board/freescale/imx8qxp_mek/spl.c

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2018 NXP
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <spl.h>
+#include <dm/uclass.h>
+#include <dm/device.h>
+#include <dm/uclass-internal.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void spl_board_init(void)
+{
+	struct udevice *dev;
+	int offset;
+
+	uclass_find_first_device(UCLASS_MISC, &dev);
+
+	for (; dev; uclass_find_next_device(&dev)) {
+		if (device_probe(dev))
+			continue;
+	}
+
+	offset = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "nxp,imx8-pd");
+	while (offset != -FDT_ERR_NOTFOUND) {
+		lists_bind_fdt(gd->dm_root, offset_to_ofnode(offset),
+			       NULL, true);
+		offset = fdt_node_offset_by_compatible(gd->fdt_blob, offset,
+						       "nxp,imx8-pd");
+	}
+
+	uclass_find_first_device(UCLASS_POWER_DOMAIN, &dev);
+
+	for (; dev; uclass_find_next_device(&dev)) {
+		if (device_probe(dev))
+			continue;
+	}
+
+	arch_cpu_init();
+
+	board_early_init_f();
+
+	timer_init();
+
+	preloader_console_init();
+
+	puts("Normal Boot\n");
+}
+
+#ifdef CONFIG_SPL_LOAD_FIT
+int board_fit_config_name_match(const char *name)
+{
+	/* Just empty function now - can't decide what to choose */
+	debug("%s: %s\n", __func__, name);
+
+	return 0;
+}
+#endif
+
+void board_init_f(ulong dummy)
+{
+	/* Clear global data */
+	memset((void *)gd, 0, sizeof(gd_t));
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	board_init_r(NULL, 0);
+}

configs/imx8qxp_mek_defconfig

@@ -1,11 +1,28 @@
 CONFIG_ARM=y
 CONFIG_ARCH_IMX8=y
 CONFIG_SYS_TEXT_BASE=0x80020000
+CONFIG_SPL_GPIO_SUPPORT=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_TARGET_IMX8QXP_MEK=y
+CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_DRIVERS_MISC_SUPPORT=y
+CONFIG_SPL=y
 CONFIG_NR_DRAM_BANKS=3
+CONFIG_SPL_FIT_GENERATOR="arch/arm/mach-imx/mkimage_fit_atf.sh"
+CONFIG_FIT=y
+CONFIG_SPL_LOAD_FIT=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/imx8qxp_mek/imximage.cfg"
 CONFIG_BOOTDELAY=3
+CONFIG_LOG=y
+CONFIG_SPL_BOARD_INIT=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_SEPARATE_BSS=y
+CONFIG_SPL_POWER_SUPPORT=y
+CONFIG_SPL_POWER_DOMAIN=y
+CONFIG_SPL_WATCHDOG_SUPPORT=y
 CONFIG_CMD_CPU=y
 # CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_CLK=y
@@ -18,8 +35,11 @@ CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_FAT=y
+CONFIG_SPL_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-imx8qxp-mek"
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SPL_DM=y
+CONFIG_SPL_CLK=y
 CONFIG_CLK_IMX8=y
 CONFIG_CPU=y
 CONFIG_DM_GPIO=y
@@ -41,12 +61,16 @@ CONFIG_FEC_MXC_MDIO_BASE=0x5B040000
 CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_PINCTRL=y
+CONFIG_SPL_PINCTRL=y
 CONFIG_PINCTRL_IMX8=y
 CONFIG_POWER_DOMAIN=y
 CONFIG_IMX8_POWER_DOMAIN=y
 CONFIG_DM_REGULATOR=y
+CONFIG_SPL_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_SPL_DM_REGULATOR_GPIO=y
 CONFIG_DM_SERIAL=y
 CONFIG_FSL_LPUART=y
+CONFIG_SPL_TINY_MEMSET=y
 # CONFIG_EFI_LOADER is not set

include/configs/imx8qxp_mek.h

@@ -9,6 +9,32 @@
 #include <linux/sizes.h>
 #include <asm/arch/imx-regs.h>
 
+#ifdef CONFIG_SPL_BUILD
+#define CONFIG_SPL_TEXT_BASE				0x0
+#define CONFIG_SPL_MAX_SIZE				(124 * 1024)
+#define CONFIG_SYS_MONITOR_LEN				(1024 * 1024)
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR		0x250
+#define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION		0
+
+#define CONFIG_SPL_LDSCRIPT		"arch/arm/cpu/armv8/u-boot-spl.lds"
+#define CONFIG_SPL_STACK		0x013E000
+#define CONFIG_SPL_BSS_START_ADDR	0x00128000
+#define CONFIG_SPL_BSS_MAX_SIZE		0x1000	/* 4 KB */
+#define CONFIG_SYS_SPL_MALLOC_START	0x00120000
+#define CONFIG_SYS_SPL_MALLOC_SIZE	0x3000	/* 12 KB */
+#define CONFIG_SERIAL_LPUART_BASE	0x5a060000
+#define CONFIG_SYS_ICACHE_OFF
+#define CONFIG_SYS_DCACHE_OFF
+#define CONFIG_MALLOC_F_ADDR		0x00120000
+
+#define CONFIG_SPL_RAW_IMAGE_ARM_TRUSTED_FIRMWARE
+
+#define CONFIG_SPL_ABORT_ON_RAW_IMAGE
+
+#define CONFIG_OF_EMBED
+#endif
+
 #define CONFIG_REMAKE_ELF
 
 #define CONFIG_BOARD_EARLY_INIT_F