Changes between Version 8 and Version 9 of ventana/PCIe

Timestamp:

09/20/2018 07:34:02 PM (6 years ago)

Author:

Ryan Erbstoesser

Comment:

clarify examples for pci enable in bootloader

ventana/PCIe

@@ -189 +189 @@
 
 == PCIe In U-Boot ==
-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.
-
+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. Clearing this variable will ENABLE PCIe in the Bootloader:
 {{{
 setenv pcidisable; saveenv; reset
 }}}
 
-Once cleared and after board reset, pci devices should enumerate as expected. 
+Once cleared and after board reset, pci devices should enumerate in the bootloader as expected. 
 
 You can further interact with the pci subsystem via the {{{pci}}} command.
+
+To disable PCI in the bootloader, use the following example:
+{{{
+setenv pcidisable 1; saveenv; reset
+}}}
 
 = Mini-PCIe Mechanical Specification =