boundary/nitrogen6x/README.mx6qsabrelite

1 U-Boot for the Freescale i.MX6q SabreLite board
4 This file contains information for the port of U-Boot to the Freescale
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11 To build U-Boot for the SabreLite board:
17 2. Boot from SD card
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20 The SabreLite boards boot from the SPI NOR flash. These boards need their SPI
21 to be reflashed with a small SD card loader to support boot from SD card. The
22 board will still boot from SPI NOR, but the loader will in turn request the
23 BootROM to load the U-Boot from SD card.
29 This is provided under a open-source 3-clause BSD license.
31 To following procedure can be used to update the SPI-NOR on the SabreLite
43    the board). Make sure SW1 switch is at position "00", so that it can boot
46 3. Power-up the SabreLite, press 'space' to enter command mode in the U-Boot
50       MX6Q SABRELITE U-Boot > mmc dev 0
51       MX6Q SABRELITE U-Boot > mmc read 0x10800000 0 200
52       MX6Q SABRELITE U-Boot > sf probe
53       MX6Q SABRELITE U-Boot > sf erase 0 0x40000
54       MX6Q SABRELITE U-Boot > sf write 0x10800000 0 0x40000
56 4. Write the u-boot.imx produced during the U-Boot build to the SD card:
58       sudo dd if=u-boot.imx of=/dev/sXx bs=512 seek=2 && sudo sync
62 5. Re-insert the SD card back in the slot for the large SD card and power-cycle
66       the micro SD4/BOOT slot on the top of the board. I.e. you have to use
74 3. Boot from SPI NOR
75 --------------------
77 The SabreLite board can also boot U-Boot directly from the SPI NOR flash:
79 1. Power-up the SabreLite, press 'space' to enter command mode in the U-Boot
88 Note: This procedure assumes you have booted using the desired U-Boot from an
90       as using tftpboot to copy an alternative U-Boot image into memory can
94 4. Recovering SPI-NOR
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97 In case you somehow do not succeed with this procedure you can upload U-Boot
106 3. Make sure SW1 switch is at position "01", so that it can boot from USB OTG.
108 4. Power-up the SabreLite and run the imx_loader to upload the U-Boot image:
110       sudo imx_usb u-boot.imx
112 Note: This will upload and run the U-Boot image in memory, the SPI will not be
116 5. Use one of previous descriptions to re-flash the SPI-NOR as required.
118 6. Ensure SW1 is returned to "00" to boot from the fuses once done.