[SRU][G/raspi][PATCH 0/2] Invalid compatible on CM4 arm64 (LP: #1919349)

[Juerg Haefliger]

[Impact]

The CM4 device tree returns an incorrect compatible for arm64.

arm64:

$ cat /proc/device-tree/model
Raspberry Pi Compute Module 4 Rev 1.0
$ cat /proc/device-tree/compatible
raspberrypi,4-model-b
brcm,bcm2711

armhf:

$ cat /proc/device-tree/model
Raspberry Pi Compute Module 4 Rev 1.0
$ cat /proc/device-tree/compatible
raspberrypi,4-compute-module
brcm,bcm2711

[Test Case]

See above.

[Where Problems Could Occur]

The brcmfmac driver uses that string to decide which wifi firmware to load. That will fail, if the correct firmware is not installed which means wifi will not work. There could be other drivers, that make use of this string.

Dave Stevenson (1):
  dts: Add CM4 to arm64 dt files

Phil Elwell (1):
  dts: Tidy the Raspberry Pi Makefile entries

 arch/arm/boot/dts/Makefile                       | 2 +-
 arch/arm64/boot/dts/broadcom/Makefile            | 6 ++----
 arch/arm64/boot/dts/broadcom/bcm2711-rpi-cm4.dts | 1 +
 3 files changed, 4 insertions(+), 5 deletions(-)
 create mode 100644 arch/arm64/boot/dts/broadcom/bcm2711-rpi-cm4.dts

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2.27.0