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Hello,
Thank you for reaching out with your question about upgrading to BSP 6 while maintaining the uImage format for your Apalis iMX6 devices. Let’s explore how you can achieve this.
Compiling uImage with BSP 6
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Yocto Configuration Adjustments:
- BSP 6 defaults to zImage, but you can attempt to compile a uImage by setting the
KERNEL_IMAGETYPEin your Yocto configuration. Add the following line to yourlocal.conf:KERNEL_IMAGETYPE = "uImage" - If you encounter errors, it may indicate that BSP 6 does not natively support uImage due to changes in the kernel build process.
- BSP 6 defaults to zImage, but you can attempt to compile a uImage by setting the
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Using the mkimage Tool:
- If direct support is unavailable, you can convert a zImage to uImage using the
mkimagetool from U-Boot tools. First, compile the kernel as zImage, then use the following command:mkimage -A arm -O linux -T kernel -C none -a 0x80008000 -e 0x80008000 -n "Linux Kernel" -d zImage uImage
- If direct support is unavailable, you can convert a zImage to uImage using the
Modifying U-Boot for Fallback
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U-Boot Configuration:
- Modify U-Boot to support both zImage and uImage. Update the boot script to check for both image types and load the appropriate one.
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Testing Across Scenarios:
- Ensure thorough testing of your modified U-Boot and kernel images for all scenarios: new devices, upgrades, failed updates, and downgrades.
By following these steps, you can maintain compatibility with your existing update mechanism while transitioning to BSP 6. If manual conversion or U-Boot modifications are not feasible, consider the benefits of transitioning fully to zImage for future-proofing your deployment.
I hope this helps you with your upgrade process.
Best regards,
Toradex AI Assistant
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