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linux/rust/helpers/property.c

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rust: device: Create FwNode abstraction for accessing device properties Accessing device properties is currently done via methods on `Device` itself, using bindings to device_property_* functions. This is sufficient for the existing method property_present. However, it's not sufficient for other device properties we want to access. For example, iterating over child nodes of a device will yield a fwnode_handle. That's not a device, so it wouldn't be possible to read the properties of that child node. Thus, we need an abstraction over fwnode_handle and methods for reading its properties. Add a struct FwNode which abstracts over the C struct fwnode_handle. Implement its reference counting analogous to other Rust abstractions over reference-counted C structs. Subsequent patches will add functionality to access FwNode and read properties with it. Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Remo Senekowitsch <remo@buenzli.dev> Link: https://lore.kernel.org/r/20250611102908.212514-2-remo@buenzli.dev [ Add temporary #[expect(dead_code)] to avoid a warning. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-06-11 12:29:00 +02:00
rust: property: add __rust_helper to helpers This is needed to inline these helpers into Rust code. Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20251202-define-rust-helper-v1-31-a2e13cbc17a6@google.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-02 19:37:55 +00:00
rust: device: Create FwNode abstraction for accessing device properties Accessing device properties is currently done via methods on `Device` itself, using bindings to device_property_* functions. This is sufficient for the existing method property_present. However, it's not sufficient for other device properties we want to access. For example, iterating over child nodes of a device will yield a fwnode_handle. That's not a device, so it wouldn't be possible to read the properties of that child node. Thus, we need an abstraction over fwnode_handle and methods for reading its properties. Add a struct FwNode which abstracts over the C struct fwnode_handle. Implement its reference counting analogous to other Rust abstractions over reference-counted C structs. Subsequent patches will add functionality to access FwNode and read properties with it. Tested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Remo Senekowitsch <remo@buenzli.dev> Link: https://lore.kernel.org/r/20250611102908.212514-2-remo@buenzli.dev [ Add temporary #[expect(dead_code)] to avoid a warning. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-06-11 12:29:00 +02:00