[RFC PATCH v1 0/3] efi_loader: Introduce platform hook for FDT selection

[Aswin Murugan]

This RFC patch series introduces a weak function hook to allow platforms to
provide custom device tree selection logic while keeping common EFI
loader code generic.

Background:
Currently, EFI loader supports loading a single DTB file.
Qualcomm platforms require special multi-DTB selection logic that:
- Reads hardware information from SMEM (Shared Memory)
- Selects the appropriate device tree from a combined DTB file based on:
  * Platform ID (SoC variant)
  * Board variant and subtype
  * PMIC configuration
  * SoC revision.

Solution:
Introduce `efi_load_platform_fdt()` as a weak function:
- Weak implementation in lib/efi_loader/efi_fdt.c (defaults to no-op)
- Called from efi_bootmgr_run() after efi_load_distro_fdt()
- Qualcomm override in arch/arm/mach-snapdragon/efi_fdt_qcom.c

Aswin Murugan (3):
  efi_loader: Add platform hook for FDT loading
  soc: qcom: smem: Added socinfo header file
  mach-snapdragon: Implement Qualcomm multi-DTB selection

 arch/arm/mach-snapdragon/Makefile       |   1 +
 arch/arm/mach-snapdragon/efi_fdt_qcom.c | 339 ++++++++++++++++++++++++
 include/soc/qcom/socinfo.h              | 114 ++++++++
 lib/efi_loader/efi_fdt.c                |  34 +++
 4 files changed, 488 insertions(+)
 create mode 100644 arch/arm/mach-snapdragon/efi_fdt_qcom.c
 create mode 100644 include/soc/qcom/socinfo.h

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2.34.1