Re: [PATCH v3 0/7] Add FIT multi-DTB selection for Qualcomm platforms

[Tom Rini <trini@konsulko.com>]

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On Fri, Apr 17, 2026 at 05:39:44PM +0530, Aswin Murugan wrote:
> This series adds dynamic device tree selection from FIT images for
> Qualcomm Snapdragon platforms, enabling U-Boot to select the
> appropriate DTB based on hardware parameters detected from SMEM.
> 
> Qualcomm fit based DTB format is documented in [1]
> The fit image contains only DTB, while the kernel will be part of UKI image.
> 
> The implementation consists of three parts:
> 
> 1. SMEM cache infrastructure: Provides cached access to commonly
>    used SMEM data (socinfo, RAM partitions) to avoid redundant
>    lookups during boot. Includes socinfo header from Linux kernel
>    for SoC identification.
> 
> 2. FIT multi-DTB selection: Implements the core selection logic
>    that reads hardware parameters from SMEM, parses metadata DTB,
>    matches FIT configurations, and loads the selected DTB with
>    overlays. Integrates with EFI boot flow by setting fdt_addr.
> 
> 3. mkimage: add fatfs image type for FAT partition images
>    Added fatimage.c handler that uses mkfs.vfat and mcopy to create
>    FAT images from a directory.

I'm unsure why part 3 here is appropriate for U-Boot. It's wrapping
existing tooling to create a fat image?

-- 
Tom

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