Hi Franck,
On 1/16/20 3:28 AM, Frank Rowand wrote:
On 1/13/20 12:16 PM, Alexandre Torgue wrote:
Hi,
The goal of this series is to add device tree build information in dtb.
This information can be dtb build date, where devicetree files come from,
who built the dtb ... Actually, same kind of information that you can find
in the Linux banner which is printout during kernel boot. Having the same
kind of information for device tree is useful for debugging and maintenance.
To achieve that a new option "-B" (using an argument) is added to dtc.
The argument is a file containing a string with build information
(e.g., From Linux 5.5.0-rc1 by alex the Mon Jan 13 18:25:38 CET 2020).
DTC use it to append dts file with a new string property "Build-info".
of/fdt.c is modified to printout "Build-info" property during Kernel boot and
scripts/Makefile.lib is modified to use dtc -B option during kernel make (this
last part could be improved for sure).
Please read through the thread at:
https://lore.kernel.org/linux-arm-kernel/550A42AC.8060104@xxxxxxxxx/
which was my attempt to do something similar.
Yes the idea is the same: get build DTB information like build date,
"who built the DTB" ... The difference seems to be the way to do it. In
my case, I don't want to modify existing dts source files., but I "just"
append them by creating a new property with a string containing this
build information.
Why your proposition has not been accepted ?
Regards
Alex
-Frank
Regards
Alex
Alexandre Torgue (3):
dtc: Add dtb build information option
of: fdt: print dtb build information
scripts: Use -B dtc option to generate dtb build information.
drivers/of/fdt.c | 9 +++++++
scripts/Makefile.lib | 11 +++++---
scripts/dtc/dtc.c | 55 +++++++++++++++++++++++++++++++++-----
scripts/gen_dtb_build_info | 11 ++++++++
4 files changed, 76 insertions(+), 10 deletions(-)
create mode 100755 scripts/gen_dtb_build_info
