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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 v7 0/2] rust: leds: add led classdev abstractions Date: Mon, 27 Oct 2025 20:06:01 +0000 Message-ID: <20251027200547.1038967-1-markus.probst@posteo.de> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2881; i=markus.probst@posteo.de; h=from:subject; bh=wSBf5Xy4Aslo7SOGQU/mF5ZHvq4mmV3sP1znVcDJV8o=; b=owEBbQKS/ZANAwAIATR2H/jnrUPSAcsmYgBo/9B4JsuuiA0OKSWEXg+sojaOajOX0n2M15kxE tnRYnT9YaSJAjMEAAEIAB0WIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaP/QeAAKCRA0dh/4561D 0tSpD/9Iagsy9UUpit6BzNhdkBEz0eYFQjCT3IUhC/LWIKycXyHU8ym65yBb2slilc2lLiZir8h BSJ/9308hnZ1u+D6wMGlZqihcxzYJrCzJdxmyDAhJnRhuC16wY+uytbBSj05CBp5Hx0FPWbLs/8 0TVmtmF8zT6VTQjCs0eNtMG9rkLIdZaso8rkp3Fl6P76ncE4CYgMe4qCx0UpcKQa+yR59pU8wxN f2L6IaB3KK68NONPrH5Gxts4Q69d+USYxuxdDeI2JEUgHL9IQInzpAP/hr1WI7d8QBhzIgp5xcQ o5eWDKVpyZz6lSv1O9tUfwqL8IqYLIH6YAL/it6VDsRwMwOhU3lWPLBk+E1WzkYW+eYAFmdxrkL jLNCpa6OB9jJcjzUY/p7INoH9edPpwcQoSh6Jv6twSkbm88a66unNJYNfrr6Uj5z1GAKVMfxzkY viLVsHVzhEwxluARsz3eNaXvMtw9pDAZ8v1tHsRSjhprJAubUlbj2/8lX5iojVQyaEXrW6IEPdY X34aaQINLSlVOVNqbHYccc9Ii5jUoEuTHaxZnfWarqAgVQUXbPLwyE27YvduqYAQe9MntNcWR0D CmIjDJmwrUAcj+MHS5ZWlfcQGEXl3KsaMVRQ3HQzOErdBdNc78rBHAYLk1exAawuWTsJE43q4yz Q05ey4gbWQ+iTEQ= = 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 v6: * fixed typos * improved documentation 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 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 | 33 ++++ 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, 436 insertions(+) create mode 100644 rust/kernel/led.rs -- 2.51.0