Vinod wrote a great blog post detailing how to boot the mainline kernel on Qualcomm devices: https://www.linaro.org/blog/let-s-boot-the-mainline-linux-kernel-on-qualcomm-devices/

Here's a summary of the commands I execute on my ARM64 Linux dev PC to boot the Open-Q 865 with the new device tree:

# make defconfig

# make Image.gz dtbs modules

# make modules_install INSTALL_MOD_PATH=./modules_dir INSTALL_MOD_STRIP=1

# cat initramfs-test-image-qemuarm64-20230321073831-1379.rootfs.cpio.gz modules.cpio.gz > final-initramfs.cpio.gz
# cat arch/arm64/boot/Image.gz arch/arm64/boot/dts/qcom/qrb5165-lantronix-openq865.dtb > Image.gz+dtb

# CMDLINE="ignore_loglevel earlycon"

# git clone https://git.codelinaro.org/clo/qsdk/oss/tools/skales --depth=1

# python2 ./skales/mkbootimg --kernel Image.gz+dtb --cmdline ${CMDLINE} --ramdisk final-initramfs.cpio.gz --base 0x80000000 --pagesize 4096 --output boot.img

# fastboot boot boot.img

If you encounter any problems just let me know and I can help you out.

William Breathitt Gray

On Wed, 31 May 2023 at 10:32, William Gray <william.gray@linaro.org> wrote:

Hi Patrick,

Here's an an initial commit for the Lantronix Open-Q 865 devkit that gets it booting up to a console (albeit with a very spare DTS): https://git.codelinaro.org/william_gray/openq-865/-/commit/42f82bde586fd1c33121884b312a0313e80ff1a8

The main files of interest are openq5165rb.dtsi which serves as an include for the the QRB5165RB SOM, while the qrb5165-lantronix-openq865.dts is the main DTS for the board. I based this around the definitions for the qrb5165-rb5 which is mostly compatible; I'll be making adjustments throughout to fit the openq865 more aptly (e.g. defining a pm8250 based on the existing pm8150 nodes).

You can follow my v5.15 development here: https://git.codelinaro.org/william_gray/openq-865/-/tree/openq865-v5.15

William Breathitt Gray

On Thu, 25 May 2023 at 13:27, William Gray <william.gray@linaro.org> wrote:
Hi Patrick,

I'm working on a device tree for Open-Q 865 that is based on the current arch/arm64/boot/dts/qcom/qrb5165-rb5.dts upstream in 6.4-rc1. I should have a basic bootable device tree ready for you to test by our next meeting on May 31. I'll also rebase a version on 5.15 so you can try that as well (qrb5165-rb5 device tree works on 5.15 so I don't anticipate any issues for the open-q 865).

William Breathitt Gray

On Thu, 25 May 2023 at 13:17, Patrick Whewell <patrick.whewell@sightlineapplications.com> wrote:

Hello,

In our last meeting on May 17 it was mentioned that there was work being done on the Lantronix device tree and it was booting in 6.4(? I think that was the version) kernel.

How’s work on porting to 5.15 going? Is there a way to get the 6.4 kernel and the device tree to test out the booting locally for us?

Patrick Whewell

Software Engineer

He/him

patrick.whewell@sightlineapplications.com

www.sightlineapplications.com

5711 S Hood Ave., Suite 100

Portland, OR 97239

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