The Raspberry Pi Compute Module 3 gathers components that are already supported in 4.19.y kernels except there's no DTB for it. This small series of patches backports: 1. the DTB addition on the arm platform 2. the extension of this addition to the arm64 platform 3. the correction of this extension.
I chose to backport patch 2 and 3 separately instead of squashing them together but I can resubmit with patches 2 and 3 merged if that's desirable.
This was successfully tested on bare metal, in 64-bit mode, with an extra patch to the raspi3-firmware packages to get the DTB installed in the right place, under the right name (bcm2710-rpi-cm3.dtb) so that the bootloader finds it. The base kernel was 4.19.37-5 as packaged in Debian.
The summary of changes follows.
Liviu Dudau (1): arm64: dts: broadcom: Use the .dtb name in the rule, rather than .dts
Stefan Wahren (2): ARM: dts: add Raspberry Pi Compute Module 3 and IO board arm64: dts: broadcom: Add reference to Compute Module IO Board V3
arch/arm/boot/dts/Makefile | 1 + arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts | 87 ++++++++++++++++++++++ arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi | 52 +++++++++++++ arch/arm64/boot/dts/broadcom/Makefile | 3 +- .../boot/dts/broadcom/bcm2837-rpi-cm3-io3.dts | 2 + 5 files changed, 144 insertions(+), 1 deletion(-) create mode 100644 arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts create mode 100644 arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi create mode 100644 arch/arm64/boot/dts/broadcom/bcm2837-rpi-cm3-io3.dts