mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 15:37:23 +00:00
a81c90f4c8
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>
62 lines
1.9 KiB
Text
62 lines
1.9 KiB
Text
FREESCALE MX28EVK
|
|
==================
|
|
|
|
Supported hardware: only MX28EVK rev D is supported in U-boot.
|
|
|
|
Files of the MX28EVK port
|
|
--------------------------
|
|
|
|
arch/arm/cpu/arm926ejs/mxs/ - The CPU support code for the Freescale i.MX28
|
|
arch/arm/include/asm/arch-mxs/ - Header files for the Freescale i.MX28
|
|
board/freescale/mx28evk/ - MX28EVK board specific files
|
|
include/configs/mx28evk.h - MX28EVK configuration file
|
|
|
|
Jumper configuration
|
|
---------------------
|
|
|
|
To boot MX28EVK from an SD card, set the boot mode DIP switches as:
|
|
|
|
* Boot Mode Select: 1 0 0 1 (Boot from SD card Slot 0 - U42)
|
|
* JTAG PSWITCH RESET: To the right (reset disabled)
|
|
* Battery Source: Down
|
|
* Wall 5V: Up
|
|
* 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 three targets for mx28evk:
|
|
|
|
"make mx28evk_config" - store environment variables into MMC
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
Follow the instructions from doc/README.mxs to generate a bootable SD card or
|
|
to generate a binary to be flashed into SPI NOR.
|