| f2e05ce9 | 01-Sep-2026 |
Sean Rhodes <sean@starlabs.systems> |
firmware: coreboot: Add CFR firmware attributes driver
coreboot can publish a CFR tree in its coreboot table to describe
firmware setup options. Add a firmware-attributes driver for that table
entry
firmware: coreboot: Add CFR firmware attributes driver
coreboot can publish a CFR tree in its coreboot table to describe
firmware setup options. Add a firmware-attributes driver for that table
entry under the coreboot firmware driver directory.
The driver exposes runtime EFI variable-backed boolean, enum and integer
settings through the firmware-attributes ABI. It only registers settings
with readable runtime EFI variables, skips suppressed, volatile,
dependency-gated and non-runtime options, and keeps read-only or inactive
options read-only in sysfs.
For settings with an APM_CNT runtime-apply record, write the EFI
variable and ask firmware to apply the setting immediately with an I/O
port SMI command. If firmware reports a failure, restore the old EFI
variable value. Settings without a runtime apply hook keep the EFI
variable update and set pending_reboot. Depend on HAS_IOPORT because
APM_CNT uses legacy I/O ports.
Tested on a Star Labs Byte with firmware 26.07: runtime APM_CNT apply
was verified with power_led, and reboot-needed behavior was verified with
debug_level.
Link: https://doc.coreboot.org/drivers/cfr.html
Link: https://doc.coreboot.org/drivers/cfr_internal.html
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Link: https://lore.kernel.org/r/73204be94586622903da7fa90757fb091e8a7c2c.1788284852.git.sean@starlabs.systems
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
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| 0e30b98a | 07-Sep-2026 |
Pawel Zalewski <pzalewski@thegoodpenguin.co.uk> |
firmware: coreboot: Use named initializers for acpi_device_id
Use a named initializer for the acpi_device_id fields which
makes the code more readable and consistent with how lists
are initialized i
firmware: coreboot: Use named initializers for acpi_device_id
Use a named initializer for the acpi_device_id fields which
makes the code more readable and consistent with how lists
are initialized in the rest of the kernel code base. Also
drop explicitly setting fields to 0 where it is redundant.
Signed-off-by: Pawel Zalewski <pzalewski@thegoodpenguin.co.uk>
Link: https://lore.kernel.org/r/20260907-acpi-firmware-v2-1-e0b6d40823d1@thegoodpenguin.co.uk
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
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