mirror of
https://github.com/torvalds/linux
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71e6b6a80b
Add a 'bound lifetime to the associated Data, changing type Data to type Data<'bound>. This allows the driver's bus device private data to capture the device / driver bound lifetime; device resources can be stored directly by reference rather than requiring Devres. The probe() and unbind() callbacks thus gain a 'bound lifetime parameter on the methods themselves; avoiding a global lifetime on the trait impl. Existing drivers set type Data<'bound> = Self, preserving the current behavior. Acked-by: Igor Korotin <igor.korotin@linux.dev> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Gary Guo <gary@garyguo.net> Link: https://patch.msgid.link/20260525202921.124698-17-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
75 lines
1.8 KiB
Rust
75 lines
1.8 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
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//! Rust I2C driver sample.
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use kernel::{
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acpi,
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device::Core,
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i2c,
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of,
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prelude::*, //
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};
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struct SampleDriver;
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kernel::acpi_device_table! {
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ACPI_TABLE,
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MODULE_ACPI_TABLE,
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<SampleDriver as i2c::Driver>::IdInfo,
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[(acpi::DeviceId::new(c"LNUXBEEF"), 0)]
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}
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kernel::i2c_device_table! {
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I2C_TABLE,
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MODULE_I2C_TABLE,
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<SampleDriver as i2c::Driver>::IdInfo,
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[(i2c::DeviceId::new(c"rust_driver_i2c"), 0)]
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}
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kernel::of_device_table! {
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OF_TABLE,
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MODULE_OF_TABLE,
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<SampleDriver as i2c::Driver>::IdInfo,
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[(of::DeviceId::new(c"test,rust_driver_i2c"), 0)]
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}
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impl i2c::Driver for SampleDriver {
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type IdInfo = u32;
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type Data<'bound> = Self;
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const ACPI_ID_TABLE: Option<acpi::IdTable<Self::IdInfo>> = Some(&ACPI_TABLE);
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const I2C_ID_TABLE: Option<i2c::IdTable<Self::IdInfo>> = Some(&I2C_TABLE);
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const OF_ID_TABLE: Option<of::IdTable<Self::IdInfo>> = Some(&OF_TABLE);
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fn probe<'bound>(
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idev: &'bound i2c::I2cClient<Core<'_>>,
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info: Option<&'bound Self::IdInfo>,
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) -> impl PinInit<Self, Error> + 'bound {
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let dev = idev.as_ref();
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dev_info!(dev, "Probe Rust I2C driver sample.\n");
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if let Some(info) = info {
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dev_info!(dev, "Probed with info: '{}'.\n", info);
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}
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Ok(Self)
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}
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fn shutdown<'bound>(idev: &'bound i2c::I2cClient<Core<'_>>, _this: Pin<&Self>) {
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dev_info!(idev.as_ref(), "Shutdown Rust I2C driver sample.\n");
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}
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fn unbind<'bound>(idev: &'bound i2c::I2cClient<Core<'_>>, _this: Pin<&Self>) {
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dev_info!(idev.as_ref(), "Unbind Rust I2C driver sample.\n");
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}
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}
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kernel::module_i2c_driver! {
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type: SampleDriver,
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name: "rust_driver_i2c",
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authors: ["Igor Korotin"],
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description: "Rust I2C driver",
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license: "GPL v2",
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}
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