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Raspberry Pi: Keep warnings from firmware in DT, if any

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The /chosen/user-warnings property is created by the RPi firmware if
there are warnings to report, keep it to make debugging easier.

For example, if the firmware config.txt contains
"dtoverlay=error-example" and that example references an undefined
symbol "&nosuchdev" the warning can be read after boot:

$ cat /proc/device-tree/chosen/user-warnings
dterror: can't find symbol 'nosuchdev'
Failed to resolve overlay 'error-example'

Signed-off-by: Fiona Klute <fiona.klute@gmx.de>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
This commit is contained in:
Fiona Klute 2025-02-12 12:39:01 +01:00 • committed by Peter Robinson
parent 2d75c46be9
commit fc7a311018
1 changed files with 3 additions and 0 deletions
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3
board/raspberrypi/rpi/rpi.c
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@ -594,6 +594,9 @@ void update_fdt_from_fw(void *fdt, void *fw_fdt)
/* kernel address randomisation seed as provided by the firmware */
copy_property(fdt, fw_fdt, "/chosen", "kaslr-seed");
/* warnings from the firmware (if any) */
copy_property(fdt, fw_fdt, "/chosen", "user-warnings");
/* address of the PHY device as provided by the firmware */
copy_property(fdt, fw_fdt, "ethernet0/mdio@e14/ethernet-phy@1", "reg");
}