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fdt: Allow indicating a node is for U-Boot proper only

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At present it is not possible to specify that a node should be used before
relocation (in U-Boot proper) without it also ending up in SPL and TPL
device trees. Add a new "u-boot,dm-pre-proper" boolean property for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2018-10-01 12:22:18 -06:00
parent a15a7aa47b
commit 06f94461a9
2 changed files with 5 additions and 1 deletions
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4
doc/driver-model/README.txt
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@ -837,7 +837,9 @@ well, if device tree is enabled there.
It is possible to limit this to specific relocation steps, by using
the more specialized 'u-boot,dm-spl' and 'u-boot,dm-tpl' flags
in the devicetree.
in the device tree node. For U-Boot proper you can use 'u-boot,dm-pre-proper'
which means that it will be processed (and a driver bound) in U-Boot proper
prior to relocation, but will not be available in SPL or TPL.
Then post relocation we throw that away and re-init driver model again.
For drivers which require some sort of continuity between pre- and

2
drivers/core/ofnode.c
View File

@ -699,6 +699,8 @@ bool ofnode_pre_reloc(ofnode node)
{
if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
return true;
if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
return true;
#ifdef CONFIG_TPL_BUILD
if (ofnode_read_bool(node, "u-boot,dm-tpl"))