[PATCH v2 0/2] mach-snapdragon: Fix and improve /memory parsing

[Sam Day]

The first commit in this series is a fix for qcom_parse_memory, which is
currently broken on master (since fc37a73e6679). It's an alternative to
the patch Caleb proposed a couple of days ago
(20250117102734.3725009-2-caleb.connolly at linaro.org). This approach
results in a smaller diff, and also makes it possible to do the thing
introduced in the second commit.

The second commit introduces the ability to boot with an internal DT
that lacks a fully specified /memory node, instead obtaining that
information from the FDT supplied by the previous bootloader.

The first commit should ideally land even if the second one needs more
rounds before it's ready. I opted to submit both commits together as one
series because, as noted earlier, the way the fix is done introduces
functionality that the second commit relies on (specifically: passing
the pointer of the specific FDT to parse for its /memory node).

I've tested both these commits together on an msm8916 device and an
sdm845 device. The msm8916 device booted with an internal DT that relies
on /memory in the external FDT to properly function. The sdm845 device
booted with an entirely external FDT. So I reckon I hit all the various
code paths in both qcom_parse_memory and board_fdt_blob_setup.

Signed-off-by: Sam Day <me at samcday.com>
---
Changes in v2:
- Update qcom_parse_memory to return -ENODATA if provided FDT lacks
  valid /memory node
- Reworked board_fdt_blob_setup logic to always try qcom_parse_memory on
  internal FDT, falling back to external if needed
- Link to v1: https://lore.kernel.org/r/20250120-qcom-parse-memory-updates-v1-0-54a7f0550cff@samcday.com

---
Sam Day (2):
      mach-snapdragon: pass fdt to qcom_parse_memory
      mach-snapdragon: support parsing memory info from external FDT

 arch/arm/mach-snapdragon/board.c | 100 ++++++++++++++++++++++++++-------------
 1 file changed, 67 insertions(+), 33 deletions(-)
---
base-commit: 639cd409987acf173eaffebe7876968b42fd7c32
change-id: 20250120-qcom-parse-memory-updates-96ffe248cdf1

Best regards,
-- 
Sam Day <me at samcday.com>