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-U-Boot for the Freescale i.MX6q SabreLite board
-
-This file contains information for the port of U-Boot to the Freescale
-i.MX6q SabreLite board.
-
-1. Boot source, boot from SD card
----------------------------------
-
-The recent mainline U-Boot for the Freescale i.MX6q SabreLite board supports
-boot from SD card only. However, by default, the SabreLite
-boards boot from the SPI NOR flash. These boards need to be reflashed with
-a small SD card loader to support boot from SD card. This small SD card loader
-will be flashed into the SPI NOR. The board will still boot from SPI NOR, but
-the loader will in turn request the BootROM to load the U-Boot from SD card.
-
-The SD card loader is available from
-
-https://wiki.linaro.org/Boards/MX6QSabreLite
-
-under a open-source 3-clause BSD license.
-
-To update the SPI-NOR on the SabreLite board without the Freescale
-manufacturing tool use the following procedure:
-
-1. Write this SD card loader onto a large SD card using:
-
- sudo dd if=iMX6DQ_SPI_to_uSDHC3.bin of=/dev/sXx
-
-Note: Replace sXx with the device representing the SD card in your system.
-
-Note: This writes SD card loader at address 0
-
-2. Put this SD card into the slot for the large SD card (SD3 on the bottom of
-the board). Make sure SW1 switch is at position "00", so that it can boot
-from the fuses.
-
-3. Power-up the SabreLite, press 'space' to enter command mode in the U-Boot
-(the default one the board is shipped with, starting from the SPI NOR) and
-enter the following commands:
-
- MX6Q SABRELITE U-Boot > mmc dev 0
- MX6Q SABRELITE U-Boot > mmc read 0x10800000 0 200
- MX6Q SABRELITE U-Boot > sf probe
- MX6Q SABRELITE U-Boot > sf erase 0 0x40000
- MX6Q SABRELITE U-Boot > sf write 0x10800000 0 0x40000
-
-4. done.
-
-In case you somehow do not succeed with this procedure you will have to use
-the Freescale manufacturing tool in order to reflash the SPI-NOR.
-
-Note: The board now boots from full size SD3 on the bottom of the board. NOT
- the micro SD4/BOOT slot on the top of the board. I.e. you have to use
- full size SD cards.
-
-This information is taken from
-
-https://wiki.linaro.org/Boards/MX6QSabreLite
-
-2. Build
---------
-
-To build U-Boot for the SabreLite board:
-
- make mx6qsabrelite_config
- make
-
-To copy the resulting u-boot.imx to the SD card:
-
- sudo dd if=u-boot.imx of=/dev/sXx bs=512 seek=2&&sudo sync
-
-Note: Replace sXx with the device representing the SD card in your system.
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