| 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 early version of 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. |
| At the moment of writing, please check with Freescale on the availablity of |
| this small SD loader binary. |
| |
| 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=MX6_SPI_to_SD_loader.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) |
| |
| 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 1 |
| 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 u-boot.imx |
| |
| 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. |
