xref: /openbmc/u-boot/board/freescale/mx28evk/README (revision d9e268ed)
1FREESCALE MX28EVK
2==================
3
4Supported hardware: MX28EVK rev C and D are supported in U-Boot.
5
6Files of the MX28EVK port
7--------------------------
8
9arch/arm/cpu/arm926ejs/mxs/	- The CPU support code for the Freescale i.MX28
10arch/arm/include/asm/arch-mxs/	- Header files for the Freescale i.MX28
11board/freescale/mx28evk/	- MX28EVK board specific files
12include/configs/mx28evk.h	- MX28EVK configuration file
13
14Jumper configuration
15---------------------
16
17To boot MX28EVK from an SD card, set the boot mode DIP switches as:
18
19   * Boot Mode Select: 1 0 0 1 (Boot from SD card Slot 0 - U42)
20   * JTAG PSWITCH RESET: To the right (reset disabled)
21   * Battery Source: Down
22   * Wall 5V: Up
23   * VDD 5V: To the left (off)
24   * Hold Button: Down (off)
25
26To boot MX28EVK from SPI NOR flash, set the boot mode DIP switches as:
27
28   * Boot Mode Select: 0 0 1 0 (Boot from SSP2)
29   * JTAG PSWITCH RESET: To the right (reset disabled)
30   * Battery Source: Down
31   * Wall 5V: Up
32   * VDD 5V: To the left (off)
33   * Hold Button: Down (off)
34
35Environment Storage
36-------------------
37
38There are three targets for mx28evk:
39
40"make mx28evk_config"		- store environment variables into MMC
41
42or
43
44"make mx28evk_nand_config"	- store environment variables into NAND flash
45
46or
47
48"make mx28evk_spi_config"       - store environment variables into SPI NOR flash
49
50Choose the target accordingly.
51
52Note: The mx28evk board does not come with a NAND flash populated from the
53factory. It comes with an empty slot (U23), which allows the insertion of a
5448-pin TSOP flash device.
55
56mx28evk does not come with SPI NOR flash populated from the factory either.
57It is possible to solder a SOIC memory on U49 or use a DIP8 on J89.
58To get SPI communication to work R320, R321,R322 and C178 need to be populated.
59Look in the schematics for the proper component values.
60
61Follow the instructions from doc/README.mxs to generate a bootable SD card or
62to generate a binary to be flashed into SPI NOR.
63