To manage overlay device tree on U-Boot via boot.scr script:
- add an overlay entry on extlinux.conf without FDT or FDTDIR
- create a directory named 'overlays' on boot directory
- populate 'overlays' with the device tree overlay
- create a file named overlays.txt on overlays directory
- syntax of overlays.txt:
overlay=aa bb cc dd
- aa, bb, cc, dd correspond to a device tree name file (without extension)
present on /overlays/ directory
/overlays/aa.dtbo
/overlays/bb.dtbo
/overlays/cc.dtbo
/overlays/dd.dtbo
Tree of bootfs addons for overlay
/overlays/aa.dtbo
/overlays/bb.dtbo
/overlays/cc.dtbo
/overlays/dd.dtbo
/overlays/overlays.txt
warning: think to add an entry on extlinux.conf without FTDIR or FDTFILE
entry
Signed-off-by: Christophe Priouzeau <christophe.priouzeau@st.com>
Change-Id: I3615d6f03cf874cf3f3c12ea1dd5882bb054542d
Romuald JEANNE
Priouzeau Christophe