{"id":2231897,"url":"http://patchwork.ozlabs.org/api/1.2/covers/2231897/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/cover/20260501-rust_leds-v16-0-9f329fdedcd9@posteo.de/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.2/projects/28/?format=json","name":"Linux PCI development","link_name":"linux-pci","list_id":"linux-pci.vger.kernel.org","list_email":"linux-pci@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260501-rust_leds-v16-0-9f329fdedcd9@posteo.de>","list_archive_url":null,"date":"2026-05-01T14:36:03","name":"[v16,0/3] rust: leds: add led classdev abstractions","submitter":{"id":91819,"url":"http://patchwork.ozlabs.org/api/1.2/people/91819/?format=json","name":"Markus Probst","email":"markus.probst@posteo.de"},"mbox":"http://patchwork.ozlabs.org/project/linux-pci/cover/20260501-rust_leds-v16-0-9f329fdedcd9@posteo.de/mbox/","series":[{"id":502466,"url":"http://patchwork.ozlabs.org/api/1.2/series/502466/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/list/?series=502466","date":"2026-05-01T14:36:03","name":"rust: leds: add led classdev abstractions","version":16,"mbox":"http://patchwork.ozlabs.org/series/502466/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2231897/comments/","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=posteo.de header.i=@posteo.de header.a=rsa-sha256\n header.s=2017 header.b=A7IcVj1u;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.232.135.74; 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Wysocki\" ,\n Bjorn Helgaas ,\n =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= ,\n Boqun Feng , Boqun Feng ","Cc":"rust-for-linux@vger.kernel.org, linux-leds@vger.kernel.org,\n linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,\n Markus Probst ","X-Developer-Signature":"v=1; a=openpgp-sha256; l=4810;\n i=markus.probst@posteo.de; h=from:subject:message-id;\n bh=Nk/J+onhYrChM8tIM4QeicPhZIUu6perTJpYx7cQuLY=;\n b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBp9LpQbrgbgI5CNX5CHhFYz+Po+naAHCmZCChIj\n sQhQUYdlZCJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCafS6UBsUgAAAAAAEAA5t\n YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9KNnw//ThFaa+mk3pmy/8F+fZ/I9Ml+j2tBT7c\n NqZ7d3IrULcBOalgF3n4g/HcUNuJmSkdjMPm+vV3Sfz8v+TV9asxOzhOoRB2/aRGnp4gbl0kq1M\n 3K5PcGkNUxiw3OTGNjwWjKz0Fqhb5u9GQdEJhP4lyp1yXrBVEHMcwik4qHj2v/U+mYfRIQaK0EV\n Uj/5/YNtf35CtzUdj3l+/SV1PPL7QBcoLDpbWhw+r5TgLHSj9oYp+JWXvPUNxsX5f4OjiEVET6X\n pf5nwdE7kJ5GviX36wGRgPe0oJ81sPNuhdDrPkeVBzolGVTX9mYpIvHctiVRJHbFf5Rsr1A7XwD\n 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in\nhttps://lore.kernel.org/rust-for-linux/20251008181027.662616-1-markus.probst@posteo.de/T/#t\nwhich added a rust written led driver for a microcontroller via i2c.\n\nAs the reading and writing to the i2c client via the register!\nmacro has not been implemented yet [1], the patch series will only\ncontain the additional abstractions required.\n\n[1] https://lore.kernel.org/rust-for-linux/DDDS2V0V2NVJ.16ZKXCKUA1HUV@kernel.org/\n\nThe following changes were made:\n* add basic led classdev abstractions to register and unregister leds\n\n* add basic led classdev abstractions to register and unregister\n multicolor leds\n\nChanges since v15:\n* fix issues reported by Sashiko bot:\n * fix returning error not possible on `brightness_get` callback\n\nChanges since v14:\n* fix issues reported by Sashiko bot:\n * add missing inlines\n * add missing Sync trait bound\n * fix vertical import layout for public export of private types\n * fix potential memory leak, if a multicolor led device with over\n `u32::MAX` subleds is registered\n* remove default_trigger option\n* fix missing CAST doc\n\nChanges since v13:\n* rebased onto v7.1-rc1\n\nChanges since v12:\n* add `led::DeviceBuilder::name()` and `DeviceBuilderState'\n* add `led::Color::as_c_str`\n\nChanges since v11:\n* use `led::DeviceBuilder` instead of `led::InitData`\n* use static_assert instead of const { assert!(...) }\n* restructured patches to avoid moving `led::Device` from\n rust/kernel/led.rs to rust/kernel/led/normal.rs in the 2. patch\n\nChanges since v10:\n* allow in-place initialization of `LedOps`\n* run rustfmt for code inside `try_pin_init!`\n\nChanges since v9:\n* add missing periods in documentation\n* duplicate `led::Device` and `led::Adapter` instead of using a complex\n trait\n* fix imports not using prelude\n* adapt to CStr change\n* documented `led::Color::Multi` and `led::Color::Rgb`\n\nChanges since v8:\n* accept `Option>` in `led::InitData::fwnode()`\n* make functions in `MultiColorSubLed` const\n* drop the \"rust: Add trait to convert a device reference to a bus\n device reference\" patch, as it has been picked into driver-core\n\nChanges since v7:\n* adjusted import style\n* added classdev parameter to callback functions in `LedOps`\n* implement `led::Color`\n* extend `led::InitData` with\n - initial_brightness\n - default_trigger\n - default_color\n* split generic and normal led classdev abstractions up (see patch 3/4)\n* add multicolor led class device abstractions (see patch 4/4)\n* added MAINTAINERS entry\n\nChanges since v6:\n* fixed typos\n* improved documentation\n\nChanges since v5:\n* rename `IntoBusDevice` trait into `AsBusDevice`\n* fix documentation about `LedOps::BLOCKING`\n* removed dependency on i2c bindings\n* added `AsBusDevice` implementation for `platform::Device`\n* removed `device::Device` fallback implementation\n* document that `AsBusDevice` must not be used by drivers and is\n intended for bus and class device abstractions only.\n\nChanges since v4:\n* add abstraction to convert a device reference to a bus device\n reference\n* require the bus device as parent device and provide it in class device\n callbacks\n* remove Pin> abstraction (as not relevant for the led\n abstractions)\n* fixed formatting in `led::Device::new`\n* fixed `LedOps::BLOCKING` did the inverse effect\n\nChanges since v3:\n* fixed kunit tests failing because of example in documentation\n\nChanges since v2:\n* return `Devres` on `led::Device` creation\n* replace KBox with T in struct definition\n* increment and decrement reference-count of fwnode\n* make a device parent mandatory for led classdev creation\n* rename `led::Handler` to `led::LedOps`\n* add optional `brightness_get` function to `led::LedOps`\n* use `#[vtable]` instead of `const BLINK: bool`\n* use `Opaque::cast_from` instead of casting a pointer\n* improve documentation\n* improve support for older rust versions\n* use `&Device` for parent\n\nChanges since v1:\n* fixed typos noticed by Onur Özkan\n\nSigned-off-by: Markus Probst \n---\nMarkus Probst (3):\n rust: leds: add basic led classdev abstractions\n rust: leds: add Mode trait\n rust: leds: add multicolor classdev abstractions\n\n MAINTAINERS | 8 +\n rust/bindings/bindings_helper.h | 1 +\n rust/kernel/led.rs | 351 ++++++++++++++++++++++++++++++++++\n rust/kernel/led/multicolor.rs | 405 ++++++++++++++++++++++++++++++++++++++++\n rust/kernel/led/normal.rs | 238 +++++++++++++++++++++++\n rust/kernel/lib.rs | 1 +\n 6 files changed, 1004 insertions(+)\n---\nbase-commit: 5e9b7d093f3f77cb0af4409559e3d139babfb443\nchange-id: 20251114-rust_leds-a959f7c2f7f9"}