Public bug reported:
Impact:
The dtb for the Raspberry CM3 board is not shipped in the Bionic -raspi2
kernel arm64 variant.
Fix:
The dtb for the cm3 board was not compiled at all, in the arm64 arch:
apply the attached patch and recompile
How to test:
The linux-modules-*-raspi2_arm64.deb should contain the bcm2710-rpi-cm3
dtb now:
$ dpkg -x linux-modules-4.15.0-1031-raspi2_4.15.0-1031.33_arm64.deb foobar
...
$ ls -l foobar/lib/firmware/4.15.0-1031-raspi2/device-tree/broadcom/
total 92
-rw-r--r-- 1 ppisati ppisati 24566 Jan 23 12:59 bcm2710-rpi-3-b-plus.dtb
-rw-r--r-- 1 ppisati ppisati 24303 Jan 23 12:59 bcm2710-rpi-3-b.dtb
-rw-r--r-- 1 ppisati ppisati 23015 Jan 23 12:59 bcm2710-rpi-cm3.dtb
-rw-r--r-- 1 ppisati ppisati 17451 Jan 23 12:59 bcm2837-rpi-3-b.dtb
Regression potential:
The patch is trivial - it just builds the cm3 dtb if arch==arm64, and
doesn't modify any existing code, so there's no regression potential at
all.
** Affects: linux-raspi2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1813133
Title:
rpi-cm3 dtb is not present in the arm64 variant
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