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d8046cd508
Introduce a comprehensive abstraction layer for the PWM subsystem to enable writing drivers in Rust. Because `Device`, `Chip`, and `PwmOps` all refer to each other, they form a single, indivisible unit with circular dependencies. They are introduced together in this single commit to create a complete, compilable abstraction layer. The main components are: - Data Wrappers: Safe, idiomatic wrappers for core C types like `pwm_device`, and `pwm_chip`. - PwmOps Trait: An interface that drivers can implement to provide their hardware-specific logic, mirroring the C `pwm_ops` interface. - FFI VTable and Adapter: A bridge to connect the high-level PwmOps trait to the C kernel's pwm_ops vtable. - Allocation and Lifetime Management: A high-level `Chip::new()` API to safely allocate a chip and a `Registration` guard that integrates with `devres` to manage the chip's registration with the PWM core. An `AlwaysRefCounted` implementation and a custom release handler prevent memory leaks by managing the chip's lifetime and freeing driver data correctly. Reviewed-by: Danilo Krummrich <dakr@kernel.org> Reviewed-by: Elle Rhumsaa <elle@weathered-steel.dev> Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com> Link: https://patch.msgid.link/20251016-rust-next-pwm-working-fan-for-sending-v16-3-a5df2405d2bd@samsung.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org> |
History
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| .. | ||
| bindings | ||
| helpers | ||
| kernel | ||
| macros | ||
| pin-init | ||
| uapi | ||
| .gitignore | ||
| .kunitconfig | ||
| bindgen_parameters | ||
| build_error.rs | ||
| compiler_builtins.rs | ||
| exports.c | ||
| ffi.rs | ||
| Makefile | ||