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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151// SPDX-License-Identifier: GPL-2.0
//! Rust I2C client registration sample.//!//! An I2C client in Rust cannot exist on its own. To register a new I2C client,//! it must be bound to a parent device. In this sample driver, a platform device//! is used as the parent.//!
//! ACPI match table test//!//! This demonstrates how to test an ACPI-based Rust I2C client registration 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::{ acpi, device, devres::Devres, i2c, of, platform, prelude::*, sync::aref::ARef, //};
#[pin_data]struct SampleDriver { parent_dev: ARef<platform::Device>, #[pin] _reg: Devres<i2c::Registration>,}
kernel::of_device_table!( OF_TABLE, MODULE_OF_TABLE, <SampleDriver as platform::Driver>::IdInfo, [(of::DeviceId::new(c"test,rust-device"), ())]);
kernel::acpi_device_table!( ACPI_TABLE, MODULE_ACPI_TABLE, <SampleDriver as platform::Driver>::IdInfo, [(acpi::DeviceId::new(c"LNUXBEEF"), ())]);
const SAMPLE_I2C_CLIENT_ADDR: u16 = 0x30;const SAMPLE_I2C_ADAPTER_INDEX: i32 = 0;const BOARD_INFO: i2c::I2cBoardInfo = i2c::I2cBoardInfo::new(c"rust_driver_i2c", SAMPLE_I2C_CLIENT_ADDR);
impl platform::Driver for SampleDriver { type IdInfo = (); type Data<'bound> = Self; 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<'bound>( pdev: &'bound platform::Device<device::Core<'_>>, _info: Option<&'bound Self::IdInfo>, ) -> impl PinInit<Self, Error> + 'bound { dev_info!( pdev.as_ref(), "Probe Rust I2C Client registration sample.\n" );
kernel::try_pin_init!( Self { parent_dev: pdev.into(),
_reg <- { let adapter = i2c::I2cAdapter::get(SAMPLE_I2C_ADAPTER_INDEX)?;
i2c::Registration::new(&adapter, &BOARD_INFO, pdev.as_ref()) } }) }
fn unbind<'bound>( pdev: &'bound platform::Device<device::Core<'_>>, _this: Pin<&Self::Data<'bound>>, ) { dev_info!( pdev.as_ref(), "Unbind Rust I2C Client registration sample.\n" ); }}
kernel::module_platform_driver! { type: SampleDriver, name: "rust_device_i2c", authors: ["Danilo Krummrich", "Igor Korotin"], description: "Rust I2C client registration", license: "GPL v2",}