By default U-Boot reserve overlay sizee with 4KB padding, sometime it is
not enought and it is normal.
The caller NEED to reserved enought memory before to apply overlay
by usisng the <extrasize> parameter.
fdt resize [<extrasize>]
- Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed
A correct value cannot be proposed (it is depending of the overlay size)
but at least you must reserved the size of the loaded overlay dtbo file
=> ${filesize} (this variable automatically updated after a load command)
Change-Id: Ib37f2778bd843436b0baddb67a7a4fd5c799b749
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
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
Patrick Delaunay
Romuald JEANNE
Priouzeau Christophe