From 54e1223aa4ca5d65fe3c6497e92bee4453aeddac Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Tue, 21 May 2019 19:19:13 +0200 Subject: dm: doc: add documentation for pre-reloc properties in SPL and TPL Add documentation for the pre-reloc property in SPL and TPL device-tree: - u-boot,dm-pre-proper - u-boot,dm-pre-reloc - u-boot,dm-spl - u-boot,dm-tpl Signed-off-by: Patrick Delaunay Reviewed-by: Simon Glass --- doc/driver-model/README.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'doc/driver-model') diff --git a/doc/driver-model/README.txt b/doc/driver-model/README.txt index 07b120d5121..532a771f688 100644 --- a/doc/driver-model/README.txt +++ b/doc/driver-model/README.txt @@ -849,6 +849,10 @@ 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. +To reduce the size of SPL and TPL, only the nodes with pre-relocation properties +('u-boot,dm-pre-reloc', 'u-boot,dm-spl' or 'u-boot,dm-tpl') are keept in their +device trees (see README.SPL for details); the remaining nodes are always bound. + Then post relocation we throw that away and re-init driver model again. For drivers which require some sort of continuity between pre- and post-relocation devices, we can provide access to the pre-relocation -- cgit v1.3.1