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Wysocki" , Lee Jones , Pavel Machek Cc: Dave Ertman , Ira Weiny , Leon Romanovsky , Boqun Feng , Gary Guo , bjorn3_gh@protonmail.com, Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Bjorn Helgaas , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Markus Probst , rust-for-linux@vger.kernel.org, linux-leds@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 0/2] rust: leds: add led classdev abstractions Date: Thu, 23 Oct 2025 17:28:15 +0000 Message-ID: <20251023172803.730677-1-markus.probst@posteo.de> Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2666; i=markus.probst@posteo.de; h=from:subject; bh=+boXjJBPWRynfBk+lRnrSB2xWOoEAPkmnAQ85xZ7MwE=; b=owEBbQKS/ZANAwAIATR2H/jnrUPSAcsmYgBo+mWbtNfzpe43PLHqMwmOrNoN7SEF/RxBOzwE5 NHZCg53VSqJAjMEAAEIAB0WIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaPplmwAKCRA0dh/4561D 0oA3D/9UHsnjWFXS+NMPcP+gGqp/2/n8K9toV9IlxtJtOX23pWtGYRefLQbGfPYW2rE/wGy7rhx QVGH0IXa4zaMb29S0x+ZUys2RTQAWteyS0XfUVsePAmNUJH9n6VRNQBWU3tzTx1oewrZZ4HbhZq HE00Qb+2iJCG28OP6SvVg0QO02ccw/6hOpRsnDJh87TyjOCZ8CsuQPppgooqozsdn4GIaZOfaqP JSh3EfhBQ7DgOAV7GEiUctc5Qt6CPR4hlLgEf6dvj6oMYRxyZdVH1NrwjkyMwbCBmgPOf+IzWjI dPG6Y8hrPqOy7UibxC9THkbWS0GmHc9Ucd1q4tZ6zWWkFzoj9tDL+lwF/TjXijG1tOsgH/R0+Po TdKA6lzucDaeeBmU6SZX1RQvg+WwfUkWHwmkeHNxIHuABZXZor7unk3xWP6zcSRNhL9su6qWwa+ ujbEl9QVmDS9fLbaZswOAIeLQO3uA57YD+D770Kno9GZz/1H16CCw5MH8fk/qu5Owm5arpUJ6uP 6Ob+W8BvonwT19oz2Uih0yiu6KCYFVj3rYNIuB/V2ys6cjXYcY2utBUIB4hpTM+UEQdEjQ0nldX 9Gfjq0pAqXNz+nccTUavRIKWox3myxBUhHDP3+rUFLhgiY0goXG+Fl5GmBZVXh/gCtpVDs9nh+b u6jbNcUbA1Qekag= = X-Developer-Key: i=markus.probst@posteo.de; 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preference=encrypt This patch series has previously been contained in https://lore.kernel.org/rust-for-linux/20251008181027.662616-1-markus.probst@posteo.de/T/#t which added a rust written led driver for a microcontroller via i2c. As the reading and writing to the i2c client via the register! macro has not been implemented yet [1], the patch series will only contain the additional abstractions required. [1] https://lore.kernel.org/rust-for-linux/DDDS2V0V2NVJ.16ZKXCKUA1HUV@kernel.org/ The following changes were made: * add abstraction to convert a device reference to a bus device reference for use in class device callbacks * add basic led classdev abstractions to register and unregister leds Changes since v5: * rename `IntoBusDevice` trait into `AsBusDevice` * fix documentation about `LedOps::BLOCKING` * removed dependency on i2c bindings * added `AsBusDevice` implementation for `platform::Device` * removed `device::Device` fallback implementation * document that `AsBusDevice` must not be used by drivers and is intended for bus and class device abstractions only. Changes since v4: * add abstraction to convert a device reference to a bus device reference * require the bus device as parent device and provide it in class device callbacks * remove Pin> abstraction (as not relevant for the led abstractions) * fixed formatting in `led::Device::new` * fixed `LedOps::BLOCKING` did the inverse effect Changes since v3: * fixed kunit tests failing because of example in documentation Changes since v2: * return `Devres` on `led::Device` creation * replace KBox with T in struct definition * increment and decrement reference-count of fwnode * make a device parent mandatory for led classdev creation * rename `led::Handler` to `led::LedOps` * add optional `brightness_get` function to `led::LedOps` * use `#[vtable]` instead of `const BLINK: bool` * use `Opaque::cast_from` instead of casting a pointer * improve documentation * improve support for older rust versions * use `&Device` for parent Changes since v1: * fixed typos noticed by Onur Özkan Markus Probst (2): rust: Add trait to convert a device reference to a bus device reference rust: leds: add basic led classdev abstractions rust/kernel/auxiliary.rs | 7 + rust/kernel/device.rs | 30 ++++ rust/kernel/led.rs | 375 +++++++++++++++++++++++++++++++++++++++ rust/kernel/lib.rs | 1 + rust/kernel/pci.rs | 7 + rust/kernel/platform.rs | 7 + rust/kernel/usb.rs | 6 + 7 files changed, 433 insertions(+) create mode 100644 rust/kernel/led.rs -- 2.51.0