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| author | Larry Johnson <lrj@acm.org> | 2009-01-28 15:30:02 -0500 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2009-01-29 10:55:56 +0100 |
| commit | f20405e31680efc36293c59b4963db57c9d93df4 (patch) | |
| tree | 30db84f0c8c35ecd4cafa15ec830569bdb66f603 /doc | |
| parent | c1b7c70083fc8d0bb77db20dd47bb6c988f3dc67 (diff) | |
| download | u-boot-imx-f20405e31680efc36293c59b4963db57c9d93df4.zip u-boot-imx-f20405e31680efc36293c59b4963db57c9d93df4.tar.gz u-boot-imx-f20405e31680efc36293c59b4963db57c9d93df4.tar.bz2 | |
ppc4xx: Add variable "korat_usbcf" for Korat board
The new environment variable "korat_usbcf" selects the USB
port used by the Korat board's CompactFlash controller.
Signed-off-by: Larry Johnson <lrj@acm.org>
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.korat | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/doc/README.korat b/doc/README.korat index 0a59f40..49cd102 100644 --- a/doc/README.korat +++ b/doc/README.korat @@ -49,3 +49,17 @@ creates the upgradable U-Boot but selecting loader file "u-boot-F7FC.lds" and leaving preprocessor symbol "CONFIG_KORAT_PERMANENT" undefined. 2008-02-22, Larry Johnson <lrj@acm.org> + + + +The CompactFlash(R) controller on the Korat board provides a hi-speed USB +interface. This may be connected to either a dedicated port on the on-board +USB controller, or to a USB port on the PowerPC 440EPx processor. The U-Boot +environment variable "korat_usbcf" can be used to specify which of these two +USB host ports is used for CompactFlash. The valid setting for the variable are +the strings "pci" and "ppc". If the variable defined and set to "ppc", then the +PowerPC USB port is used. In all other cases the on-board USB controller is +used, but if "korat_usbcf" is defined but is set to a string other than the two +valid options, a warning is also issued. + +2009-01-28, Larry Johnson <lrj@acm.org> |