How to use U-Boot on Freescale MX6SXSCM boards
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- Build U-Boot for MX6SXSCM EVB board*:

$ make mx6sxscm_1gb_evb_defconfig
$ make

This will generate the u-boot image u-boot.imx.

- Flash the u-boot image into the micro SD card:

sudo dd if=u-boot.imx of=/dev/sdX bs=1k seek=1; sync

*Other defconfigs availabe are:
    mx6sxscm_1gb_evb_defconfig
    mx6sxscm_1gb_evb_m4fastup_defconfig
    mx6sxscm_1gb_evb_qspi2_defconfig

- Jumper settings for fix mode images to boot from the top SD3:

 SW2: OFF OFF OFF OFF OFF OFF OFF OFF
 SW3: OFF OFF ON  ON  OFF OFF OFF OFF
 SW4: OFF ON  OFF OFF OFF OFF ON  OFF


Additional configurations
==========================

For custom configurations like 512MB or ePOP, the CONFIG_SYS_EXTRA_OPTIONS option on the defconfig
file can be modified according to the customization needed.

Here are some examples for some combinations among the different supported options:

512mb evb
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CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6sxscm/imximage_lpddr2.cfg,MX6SX,512MB_LPDDR2"


epop evb:
---------
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6sxscm/imximage_lpddr2.cfg,MX6SX,512MB_LPDDR2,MX6SXSCM_EMMC"


epop evb qspi2-boot:
--------------------
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6sxscm/imximage_lpddr2.cfg,MX6SX,512MB_LPDDR2,MX6SXSCM_EMMC,SYS_BOOT_QSPI"