On 4/7/22 14:30, Masahiro Yamada wrote:
Hi Marek.
(+CC Rob, DT ML)
Hi,
On Thu, Apr 7, 2022 at 8:05 PM Marek Vasut <marex@xxxxxxx> wrote:
Emit symbols section in DTBs to permit symbol resolution when applying DTOs.
I CCed DT folks, but if I remember correctly, adding -@ globally
was NACKed because it would increase blob size for platforms that
do not need overlay.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
NOTE: I am sending this as RFC, because I suspect there is a better way how
to pass extra flags to DTC during kernel build ?
Maybe from shell environment somehow ?
For local use, yes, you can add -@ from the command line.
Try this:
DTC_FLAGS=-@ make ARCH=arm64 dtbs
This is undocumented tip, but it seems to work
for the current code.
This is real nice (and very much what I need), thank you.
Or maybe b7e70391a5451 ("arm64: tegra: Enable device-tree overlay support")
is the way to go about this ?
Since commit 15d16d6dadf6947ac7f9a686c615995c5a426ce2,
adding -@ is automatic for platforms that support overlay.
If <platform>-dtbs exists, -@ is automatically added.
See arch/arm64/boot/dts/xilinx/Makefile
as an example code.
Is it now allowed to start upstreaming DT overlays then ?
That would be nice too.
