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| author | Simon Glass <sjg@chromium.org> | 2018-10-01 12:22:17 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2018-10-09 04:40:27 -0600 |
| commit | a15a7aa47be25580413a49f9e8f33ba02a46ede7 (patch) | |
| tree | 403946143b2dacf22b36e4da3d05b16d486467c8 /doc/README.fdt-control | |
| parent | 343864afd7ca8c4f2d9d07a40929d897ec7c359c (diff) | |
doc: Update docs for device tree in SPL, TPL
Make a few small updates to indicate that device tree can be used in SPL
and TPL.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc/README.fdt-control')
| -rw-r--r-- | doc/README.fdt-control | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/README.fdt-control b/doc/README.fdt-control index 88c04692f7..d6ab7bf570 100644 --- a/doc/README.fdt-control +++ b/doc/README.fdt-control @@ -174,6 +174,16 @@ After board configuration is done, fdt supported u-boot can be build in two ways $ make DEVICE_TREE=<dts-file-name> +Relocation, SPL and TPL +----------------------- + +U-Boot can be divided into three phases: TPL, SPL and U-Boot proper. + +The full device tree is available to U-Boot proper, but normally only a subset +(or none at all) is available to TPL and SPL. See 'Pre-Relocation Support' and +'SPL Support' in doc/driver-model/README.txt for more details. + + Limitations ----------- |