Kontron AM4140 U-Boot Bootloader - Manual (Page 32)

U-Boot Usage AM4140 U-Boot Bootloader
Page 32 ID 1052-0281, Rev. 1.0
P R E L I M I N A R Y
3.9 vpd Command
vpd
FUNCTION: Provides display and importing functions for vital product data entities
SYNTAX: vpd print [<name>]|…
import <name>|all_params
where:
vpd command
print option:
displays VPD information (source: System EEPROM)
(if <name> is not used, all VPD entities are displayed)
<name> parameter: text string
<[x … ]x>
name of VPD entity addressed by option
import option:
imports VPD information to the U-Boot environment
(source: System EEPROM; target: RAM)
all_params parameter: text constant
all_params
selects all VPD entities for importing to the U-Boot
environment
DESCRIPTION: Vital Product Data are information stored in the System EEPROM which
are required for proper operation of the board. With this command the
VPD entities can be displayed or imported to the U-Boot environment in
RAM.
Among the VPD entities are, for example, the board serial number and
the board’s Ethernet MAC addresses.
If the option “import” is invoked, existing VPD entities in the environment
in RAM are overwritten. If a “saveenv” is then invoked, the previously
stored values in the currently active SPI boot flash environment area are
overwritten.
USAGE: Display all VPD entities
COMMAND / RESPONSE:
=> vpd print
<response: displays all VPD entities>
=>