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doc: Update docs for device tree in SPL, TPL

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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>
This commit is contained in:
Simon Glass
2018-10-01 12:22:17 -06:00
parent 343864afd7
commit a15a7aa47b
2 changed files with 12 additions and 1 deletions
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10
doc/README.fdt-control
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@@ -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
-----------