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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566// SPDX-License-Identifier: GPL-2.0
//! Device Tree / Open Firmware abstractions.
use crate::{ bindings, device_id::{RawDeviceId, RawDeviceIdIndex}, prelude::*,};
/// IdTable type for OF drivers.pub type IdTable<T> = &'static dyn kernel::device_id::IdTable<DeviceId, T>;
/// An open firmware device id.#[repr(transparent)]#[derive(Clone, Copy)]pub struct DeviceId(bindings::of_device_id);
// SAFETY: `DeviceId` is a `#[repr(transparent)]` wrapper of `struct of_device_id` and// does not add additional invariants, so it's safe to transmute to `RawType`.unsafe impl RawDeviceId for DeviceId { type RawType = bindings::of_device_id;}
// SAFETY: `DRIVER_DATA_OFFSET` is the offset to the `data` field.unsafe impl RawDeviceIdIndex for DeviceId { const DRIVER_DATA_OFFSET: usize = core::mem::offset_of!(bindings::of_device_id, data);
fn index(&self) -> usize { self.0.data as usize }}
impl DeviceId { /// Create a new device id from an OF 'compatible' string. pub const fn new(compatible: &'static CStr) -> Self { let src = compatible.to_bytes_with_nul(); // Replace with `bindings::of_device_id::default()` once stabilized for `const`. // SAFETY: FFI type is valid to be zero-initialized. let mut of: bindings::of_device_id = unsafe { core::mem::zeroed() };
// TODO: Use `copy_from_slice` once stabilized for `const`. let mut i = 0; while i < src.len() { of.compatible[i] = src[i]; i += 1; }
Self(of) }}
/// Create an OF `IdTable` with an "alias" for modpost.#[macro_export]macro_rules! of_device_table { ($table_name:ident, $module_table_name:ident, $id_info_type: ty, $table_data: expr) => { const $table_name: $crate::device_id::IdArray< $crate::of::DeviceId, $id_info_type, { $table_data.len() }, > = $crate::device_id::IdArray::new($table_data);
$crate::module_device_table!("of", $module_table_name, $table_name); };}