linux-kernel - [PATCH v2 0/5] rust: Add ACPI match table support for Rust drivers

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Message-ID: <20250605161956.3658374-1-igor.korotin.linux@gmail.com>
Date: Thu,  5 Jun 2025 17:19:56 +0100
From: Igor Korotin <igor.korotin.linux@...il.com>
To: Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Rob Herring <robh@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	devicetree@...r.kernel.org
Cc: Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>,
	Len Brown <lenb@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Wedson Almeida Filho <wedsonaf@...il.com>,
	Alex Hung <alex.hung@....com>,
	Tamir Duberstein <tamird@...il.com>,
	FUJITA Tomonori <fujita.tomonori@...il.com>,
	Xiangfei Ding <dingxiangfei2009@...il.com>,
	Igor Korotin <igor.korotin.linux@...il.com>
Subject: [PATCH v2 0/5] rust: Add ACPI match table support for Rust drivers

This patch series introduces support for ACPI match tables in Rust 
drivers.

Currently, Rust abstractions support only Open Firmware (OF) device 
matching. This series extends the driver model to support ACPI-based 
matching, enabling Rust drivers to bind to ACPI-described devices.

Changes include:
  - A new `acpi::DeviceId` abstraction for working with 
   `struct acpi_device_id`.
  - A helper function `is_of_node()` for determining fwnode types.
  - Updates to the core `Adapter` trait and `platform::Driver` to support
    optional ACPI ID tables.
  - A sample implementation in the Rust platform driver, demonstrating 
    multi-bus matching.

This is especially useful for writing drivers that work across platforms 
using both OF and ACPI.

Tested using QEMU with a custom SSDT that creates an ACPI device matching
the sample Rust platform driver.

Igor Korotin (5):
  rust: acpi: add `acpi::DeviceId` abstraction
  rust: helpers: Add `is_of_node` helper function
  rust: driver: Add ACPI id table support to Adapter trait
  rust: platform: Add ACPI match table support to `Driver` trait
  samples: rust: add ACPI match table example to platform driver

Changelog
---------
v2:
 - Removed misleading comment in `acpi::DeviceID` implementation. 
 - Removed unnecessary casting in `acpi::DeviceID::new`.
 - Moved `pub mod acpi` to correct alphabetical position in `rust/kernel/lib.rs`.
 - Link to v1: https://lore.kernel.org/rust-for-linux/20250530123815.1766726-1-igor.korotin.linux@gmail.com/

 MAINTAINERS                          |  2 +
 rust/bindings/bindings_helper.h      |  1 +
 rust/helpers/helpers.c               |  1 +
 rust/helpers/of.c                    |  6 +++
 rust/kernel/acpi.rs                  | 62 ++++++++++++++++++++++++++++
 rust/kernel/driver.rs                | 58 ++++++++++++++++++++++++--
 rust/kernel/lib.rs                   |  1 +
 rust/kernel/platform.rs              | 17 +++++++-
 samples/rust/rust_driver_platform.rs | 41 +++++++++++++++++-
 9 files changed, 183 insertions(+), 6 deletions(-)
 create mode 100644 rust/helpers/of.c
 create mode 100644 rust/kernel/acpi.rs

-- 
2.43.0