diff options
| author | Simon Glass <sjg@chromium.org> | 2011-10-24 19:15:34 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-10-26 21:40:16 +0200 |
| commit | eea63e05d0b7f54e7aa39725015483972c71cb3c (patch) | |
| tree | 6efe7cc0f7dc4eea53b04fc1ac02e35b552af8d4 /doc/README.fdt-control | |
| parent | f5437ad141e13ff03dccb24707e8100d2b0295fd (diff) | |
fdt: ARM: Add fdtcontroladdr to set device tree address in environment
This adds support for a new environment variable called 'fdtcontroladdr'. If
defined, the hex address is used as the address of the control fdt for U-Boot.
Note: I have not changed CONFIG_PRAM section as I already have an
outstanding patch on that.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc/README.fdt-control')
| -rw-r--r-- | doc/README.fdt-control | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/README.fdt-control b/doc/README.fdt-control index 3f8bb5a670..85bda03504 100644 --- a/doc/README.fdt-control +++ b/doc/README.fdt-control @@ -144,6 +144,18 @@ and then flash image.bin onto your board. You cannot use both of these options at the same time. +If you wish to put the fdt at a different address in memory, you can +define the "fdtcontroladdr" environment variable. This is the hex +address of the fdt binary blob, and will override either of the options. +Be aware that this environment variable is checked prior to relocation, +when only the compiled-in environment is available. Therefore it is not +possible to define this variable in the saved SPI/NAND flash +environment, for example (it will be ignored). + +To use this, put something like this in your board header file: + +#define CONFIG_EXTRA_ENV_SETTINGS "fdtcontroladdr=10000\0" + Limitations ----------- |