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authorStephen Warren <swarren@nvidia.com>2016-01-26 11:10:13 -0700
committerSimon Glass <sjg@chromium.org>2016-01-28 21:01:23 -0700
commit986691fb97bc245be517a9db1297cfa71dd865cf (patch)
tree36dde58b6269ef2844de3ee05282cde825297bb9 /doc
parent3483b75d94716191b354d046b4ed3f322500a3ee (diff)
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distro bootcmd: enumerate PCI before network operations
The PCI bus must be enumerated before PCI devices, such as Ethernet devices, are known to U-Boot. Enhance the distro boot commands to perform PCI enumeration when needed. Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc')
-rw-r--r--doc/README.distro8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/README.distro b/doc/README.distro
index 019903e..3715c8c 100644
--- a/doc/README.distro
+++ b/doc/README.distro
@@ -349,6 +349,14 @@ boot_net_usb_start:
device is not attached to USB, and you wish to increase boot speed by
avoiding unnecessary actions.
+boot_net_pci_enum:
+
+ If you want to prevent PCI enumeration by distro boot commands which execute
+ network operations, set the value to something innocuous, e.g. setenv
+ boot_net_pci_enum true. This would be useful if you know your Ethernet
+ device is not attached to PCI, and you wish to increase boot speed by
+ avoiding unnecessary actions.
+
Interactively booting from a specific device at the u-boot prompt
=================================================================