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| author | Fabio Estevam <fabio.estevam@freescale.com> | 2014-06-10 00:03:59 -0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-06-17 16:39:10 +0200 |
| commit | a81c90f4c8a7e77a0a6bf4b7288bf32f15d923a2 (patch) | |
| tree | 25a406f052d1de5d0812f80193323f6685d0b8a2 /board/freescale | |
| parent | d4c8258812ace8991faf6f66fb6d81f4546a749f (diff) | |
| download | blackbird-obmc-uboot-a81c90f4c8a7e77a0a6bf4b7288bf32f15d923a2.tar.gz blackbird-obmc-uboot-a81c90f4c8a7e77a0a6bf4b7288bf32f15d923a2.zip | |
mx28evk: Add documentation on how to boot from SPI NOR
Explain the necessary steps in order to boot from SPI NOR.
Based on a earlier submission from Mårten Wikman.
Signed-off-by: Mårten Wikman <marten.wikman@novia.fi>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Diffstat (limited to 'board/freescale')
| -rw-r--r-- | board/freescale/mx28evk/README | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/board/freescale/mx28evk/README b/board/freescale/mx28evk/README index 0389a1d86c..958ebc6791 100644 --- a/board/freescale/mx28evk/README +++ b/board/freescale/mx28evk/README @@ -23,11 +23,19 @@ To boot MX28EVK from an SD card, set the boot mode DIP switches as: * VDD 5V: To the left (off) * Hold Button: Down (off) +To boot MX28EVK from SPI NOR flash, set the boot mode DIP switches as: + + * Boot Mode Select: 0 0 1 0 (Boot from SSP2) + * JTAG PSWITCH RESET: To the right (reset disabled) + * Battery Source: Down + * Wall 5V: Up + * VDD 5V: To the left (off) + * Hold Button: Down (off) Environment Storage ------------------- -There are two targets for mx28evk: +There are three targets for mx28evk: "make mx28evk_config" - store environment variables into MMC @@ -35,12 +43,20 @@ or "make mx28evk_nand_config" - store environment variables into NAND flash +or + +"make mx28evk_spi_config" - store enviroment variables into SPI NOR flash + Choose the target accordingly. Note: The mx28evk board does not come with a NAND flash populated from the factory. It comes with an empty slot (U23), which allows the insertion of a 48-pin TSOP flash device. -Follow the instructions from doc/README.mxs to generate a bootable SD card. +mx28evk does not come with SPI NOR flash populated from the factory either. +It is possible to solder a SOIC memory on U49 or use a DIP8 on J89. +To get SPI communication to work R320, R321,R322 and C178 need to be populated. +Look in the schematics for the proper component values. -Insert the SD card in slot 0, power up the board and U-boot will boot. +Follow the instructions from doc/README.mxs to generate a bootable SD card or +to generate a binary to be flashed into SPI NOR. |
