Changes between Version 8 and Version 9 of ventana/PCIe


Ignore:
Timestamp:
09/20/2018 12:34:02 PM (3 months ago)
Author:
Ryan Erbstoesser
Comment:

clarify examples for pci enable in bootloader

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  • ventana/PCIe

    v8 v9  
    189189
    190190== PCIe In U-Boot ==
    191 To avoid PCI and PCIe related issues in Linux, the default bootloader behavior is to disable all pci until booting to Linux. In order to use any pci or pcie devices while in the bootloader, the {{{pcidisable}}} environment variable must be cleared.
    192 
     191To avoid PCI and PCIe related issues in Linux, the default bootloader behavior is to disable all pci until booting to Linux.
     192
     193In order to use any pci or pcie devices while in the bootloader, the {{{pcidisable}}} environment variable must be cleared. Clearing this variable will ENABLE PCIe in the Bootloader:
    193194{{{
    194195setenv pcidisable; saveenv; reset
    195196}}}
    196197
    197 Once cleared and after board reset, pci devices should enumerate as expected.
     198Once cleared and after board reset, pci devices should enumerate in the bootloader as expected.
    198199
    199200You can further interact with the pci subsystem via the {{{pci}}} command.
     201
     202To disable PCI in the bootloader, use the following example:
     203{{{
     204setenv pcidisable 1; saveenv; reset
     205}}}
    200206
    201207= Mini-PCIe Mechanical Specification =