[PATCH 0/1] [SRU] [B-C/raspi2] build CM3 dtb if (arch=arm64)

[Paolo Pisati]

BugLink: https://bugs.launchpad.net/bugs/1813133

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 code, so the regression potential is zero here.

Patch applies cleanly to Cosmic/raspi2 too.


Steve Pavao (1):
  devicetree: add RPi CM3 dts to arm64; mimic the RPi 3B arm64 dts
    implementation, by referring to the actual dts file in the arm
    directory

 arch/arm64/boot/dts/broadcom/Makefile            | 2 ++
 arch/arm64/boot/dts/broadcom/bcm2710-rpi-cm3.dts | 3 +++
 2 files changed, 5 insertions(+)
 create mode 100644 arch/arm64/boot/dts/broadcom/bcm2710-rpi-cm3.dts

-- 
2.17.1