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samples: rust: add ACPI match table example to platform driver

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Extend the Rust sample platform driver to probe using device/driver name
matching, OF ID table matching, or ACPI ID table matching.

Signed-off-by: Igor Korotin <igor.korotin.linux@gmail.com>
Link: https://lore.kernel.org/r/20250620154552.299932-1-igor.korotin.linux@gmail.com
[ Use 'LNUXBEEF' as ACPI ID. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
Igor Korotin
2025-06-20 16:45:52 +01:00
committed by Danilo Krummrich
parent 8411e6f06a
commit 140a9d0437
1 changed files with 69 additions and 1 deletions
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70
samples/rust/rust_driver_platform.rs
View File

@@ -2,8 +2,68 @@
//! Rust Platform driver sample.
//! ACPI match table test
//!
//! This demonstrates how to test an ACPI-based Rust platform driver using QEMU
//! with a custom SSDT.
//!
//! Steps:
//!
//! 1. **Create an SSDT source file** (`ssdt.dsl`) with the following content:
//!
//! ```asl
//! DefinitionBlock ("", "SSDT", 2, "TEST", "VIRTACPI", 0x00000001)
//! {
//! Scope (\_SB)
//! {
//! Device (T432)
//! {
//! Name (_HID, "LNUXBEEF") // ACPI hardware ID to match
//! Name (_UID, 1)
//! Name (_STA, 0x0F) // Device present, enabled
//! Name (_CRS, ResourceTemplate ()
//! {
//! Memory32Fixed (ReadWrite, 0xFED00000, 0x1000)
//! })
//! }
//! }
//! }
//! ```
//!
//! 2. **Compile the table**:
//!
//! ```sh
//! iasl -tc ssdt.dsl
//! ```
//!
//! This generates `ssdt.aml`
//!
//! 3. **Run QEMU** with the compiled AML file:
//!
//! ```sh
//! qemu-system-x86_64 -m 512M \
//! -enable-kvm \
//! -kernel path/to/bzImage \
//! -append "root=/dev/sda console=ttyS0" \
//! -hda rootfs.img \
//! -serial stdio \
//! -acpitable file=ssdt.aml
//! ```
//!
//! Requirements:
//! - The `rust_driver_platform` must be present either:
//! - built directly into the kernel (`bzImage`), or
//! - available as a `.ko` file and loadable from `rootfs.img`
//!
//! 4. **Verify it worked** by checking `dmesg`:
//!
//! ```
//! rust_driver_platform LNUXBEEF:00: Probed with info: '0'.
//! ```
//!
use kernel::{
c_str,
acpi, c_str,
device::{
self,
property::{FwNodeReferenceArgs, NArgs},
@@ -28,9 +88,17 @@ struct SampleDriver {
[(of::DeviceId::new(c_str!("test,rust-device")), Info(42))]
);
kernel::acpi_device_table!(
ACPI_TABLE,
MODULE_ACPI_TABLE,
<SampleDriver as platform::Driver>::IdInfo,
[(acpi::DeviceId::new(c_str!("LNUXBEEF")), Info(0))]
);
impl platform::Driver for SampleDriver {
type IdInfo = Info;
const OF_ID_TABLE: Option<of::IdTable<Self::IdInfo>> = Some(&OF_TABLE);
const ACPI_ID_TABLE: Option<acpi::IdTable<Self::IdInfo>> = Some(&ACPI_TABLE);
fn probe(
pdev: &platform::Device<Core>,