linux-kernel - [PATCH v2 0/2] DMI: Scan for DMI table from DTS info

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Message-ID: <20251022114527.618908-1-adriana@arista.com>
Date: Wed, 22 Oct 2025 04:45:25 -0700
From: adriana <adriana@...sta.com>
To: krzk@...nel.org,
	robh+dt@...nel.org,
	jdelvare@...e.com,
	frowand.list@...il.com
Cc: linux-arm-kernel@...ts.infradread.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	vasilykh@...sta.com,
	adriana@...sta.com
Subject: [PATCH v2 0/2] DMI: Scan for DMI table from DTS info

Some bootloaders like U-boot, particularly for the ARM architecture,
provide SMBIOS/DMI tables at a specific memory address. However, these
systems often do not boot using a full UEFI environment, which means the
kernel's standard EFI DMI scanner cannot find these tables.

This series adds support for the kernel to find these tables by
reading properties from the Device Tree /chosen node. The bootloader
can specify the physical addresses using "linux,smbios-table" and
"linux,smbios3-table".

The first patch introduces the device tree binding documentation for this
new ABI, and the second patch implements the driver logic in dmi_scan.c.

Changes in v2:
  - Add missing Device Tree binding documentation (Patch 1/2).
  - Split the original patch into a 2-part series (binding + driver).
  - (No functional changes to the driver code in patch 2/2).

Adriana Nicolae (2):
  dt-bindings: firmware: Add binding for SMBIOS /chosen properties
  drivers: firmware: dmi_scan: Add support for reading SMBIOS from DT

 Documentation/devicetree/bindings/firmware/linux,smbios-table.yaml | 33 +++++
 drivers/firmware/dmi_scan.c                                        | 74 ++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/firmware/linux,smbios-table.yaml

-- 
2.34.1