From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 53932314B76 for ; Thu, 22 Jan 2026 12:51:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.65 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769086298; cv=none; b=ucg+YLMojvzFM8wYFOWgA5u69QNaV02QQZzLN3L+h9wmLFY5nJP5ZbNSNizWxmojWA0AAwN0iaI55urpqh6fLZaRxmPG4O5u8sDfd0BCYOjegTGRF6rf+MDsvNB05GCOcUH0xgXV4yoK3jQ280Jv4gkUJTJPIIg/BPForvJtV6Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769086298; c=relaxed/simple; bh=YTUoMiMvmALkqCTyfatdyMPygfkUCYqDU3rvdHQ1f30=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=VHfKUiZCZqATmku07TLpc7qKkv3FCK26FHrRlTzdgIZJ19U9vnn3zrruHBEsi/BqtPvCbouVUnLCezmy371vLaAbMPoV3Ox4IFde1RML6BUO2fNh+jucznvrqMkGD/bv4MjZ6Bw1eqwkvic30rLlXlPVZDzlcyHz5t4xFAklSM4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de; spf=pass smtp.mailfrom=posteo.de; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b=eziGV2S8; arc=none smtp.client-ip=185.67.36.65 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=posteo.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b="eziGV2S8" Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 4F3E124002A for ; Thu, 22 Jan 2026 13:42:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1769085727; bh=sZ1lXBwnqBcy25rguzwRQgOv8RFUDK2HqRA30fULMTU=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type: Content-Transfer-Encoding:To:Cc:Autocrypt:OpenPGP:From; b=eziGV2S8Z6LimuDExWfGdtwpqLrBPDLd7cxsQGgUWL/xboG4jR8Rx0b08RrC5h2cj kzlfz7plrjngO88F6rD7lWYcP7VhFwUOZ/Lq8TFHbvvu5ZhtaSKhVFk0laxLwiwjr0 eaCJydx5OCEUX4NzhH96m8R+KUL3ikfnvR28zQMn7hpn1T8AfxgLaGKx7Z9gAyRUn5 02r/XEtFx56o/P53rnijL3Ish5VQE2u+VgRaDXvo976CuilCzBvkDZZXQGbGBsioZs nmPKUFo+yvN3jHaRGKvdxa/eBI1bVPSJ4dCtwWx/Z1aNcge1Bh/z3q9G6fxxi3ikZy +GxNTc+rn0MUQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4dxggF324tz6v45; Thu, 22 Jan 2026 13:42:01 +0100 (CET) From: Markus Probst Subject: [PATCH RESEND v10 0/3] rust: leds: add led classdev abstractions Date: Thu, 22 Jan 2026 12:42:05 +0000 Message-Id: <20260122-rust_leds-v10-0-fb9edb04b080@posteo.de> Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: Lee Jones , Pavel Machek , Greg Kroah-Hartman , Dave Ertman , Ira Weiny , Leon Romanovsky , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , "Rafael J. Wysocki" , Bjorn Helgaas , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= Cc: rust-for-linux@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Markus Probst X-Developer-Signature: v=1; a=openpgp-sha256; l=4767; i=markus.probst@posteo.de; h=from:subject:message-id; bh=YTUoMiMvmALkqCTyfatdyMPygfkUCYqDU3rvdHQ1f30=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBpchsCTb0N03WkFC2xqkoiERSMsVD1exe6zRKKn osGG/5EO0eJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaXIbAhsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMSwyLDIACgkQNHYf+OetQ9KyyBAAgpGQQhPZKLRcI3CqkhvbARDjGbAPqbI DYq6wN6ixk7+q8KBNfailYvGuZ/CAgnapeGAzV373CGsi+LcNRl/vgV6yw11tjhjJXHx6tafaA0 sqKyspabR+i8z1TeTBwpCAtMRPRGKuKHsgbzN9xC8C5mW2px5gmU++oPX/Gr35ErsM2+ooBP2kp yVZW3bla5BPvH+BoS0tMjZsWTiXfSYN5t6ua3HWw2JaDJ1dL8wce1z/39xLPMwJ2xr7mjdY+Xkp ewMjqNs5MO+602w5Qe0Vq6myC0chEKn8KggrMS2QTF6mywBLKyuW+PooVlSsRAWD1uDTyxSU5sj PVeng3UfGwRgpC8aOTrQifkgG36zLFr0SYmJwQfH5W7ZPOOJtSVV19ZQxoWCb/gpG93tTcA2+7a PcRG0VptdsmQ8J94oksEBPZt5FNUCTJaEnodzplv+HA3rCMwicHzdIBI9/xBVauIW95bPkkPyWo 5aGAb6IVKCENCeqKN3HXVKJ3kCZB5opEcHpK9orAH+s0wux4/vXA2swGsBqE9qqRe0686YZ3MKx uteAM0WuZ0/GnO8OeOBONC8mq0wCQ+7OuRuXYWlSJdIuMLz9IP/hG6O1xqXn5dUn0Vmsd3+BdD/ CsDkz+mNm6wvk5rah0cfZ39cLxS4vVa+f/XdKm9WOyAJLDErpx1Q= X-Developer-Key: i=markus.probst@posteo.de; a=openpgp; fpr=827418C4F4AC58E77230C47334761FF8E7AD43D2 Autocrypt: addr=markus.probst@posteo.de; prefer-encrypt=mutual; keydata=xsFNBGiDvXgBEADAXUceKafpl46S35UmDh2wRvvx+UfZbcTjeQOlSwKP7YVJ4JOZrVs93qReNLkO WguIqPBxR9blQ4nyYrqSCV+MMw/3ifyXIm6Pw2YRUDg+WTEOjTixRCoWDgUj1nOsvJ9tVAm76Ww+ /pAnepVRafMID0rqEfD9oGv1YrfpeFJhyE2zUw3SyyNLIKWD6QeLRhKQRbSnsXhGLFBXCqt9k5JA RhgQof9zvztcCVlT5KVvuyfC4H+HzeGmu9201BVyihJwKdcKPq+n/aY5FUVxNTgtI9f8wIbmfAja oT1pjXSp+dszakA98fhONM98pOq723o/1ZGMZukyXFfsDGtA3BB79HoopHKujLGWAGskzClwTjRQ xBqxh/U/lL1pc+0xPWikTNCmtziCOvv0KA0arDOMQlyFvImzX6oGVgE4ksKQYbMZ3Ikw6L1Rv1J+ FvN0aNwOKgL2ztBRYscUGcQvA0Zo1fGCAn/BLEJvQYShWKeKqjyncVGoXFsz2AcuFKe1pwETSsN6 OZncjy32e4ktgs07cWBfx0v62b8md36jau+B6RVnnodaA8++oXl3FRwiEW8XfXWIjy4umIv93tb8 8ekYsfOfWkTSewZYXGoqe4RtK80ulMHb/dh2FZQIFyRdN4HOmB4FYO5sEYFr9YjHLmDkrUgNodJC XCeMe4BO4iaxUQARAQABzRdtYXJrdXMucHJvYnN0QHBvc3Rlby5kZcLBkQQTAQgAOxYhBIJ0GMT0 rFjncjDEczR2H/jnrUPSBQJog714AhsDBQsJCAcCAiICBhUKCQgLAgQWAgMBAh4HAheAAAoJEDR2 H/jnrUPSgdkQAISaTk2D345ehXEkn5z2yUEjaVjHIE7ziqRaOgn/QanCgeTUinIv6L6QXUFvvIfH 1OLPwQ1hfvEg9NnNLyFezWSy6jvoVBTIPqicD/r3FkithnQ1IDkdSjrarPMxJkvuh3l7XZHo49GV HQ8i5zh5w4YISrcEtE99lJisvni2Jqx7we5tey9voQFDyM8jxlSWv3pmoUTCtBkX/eKHJXosgsuS B4TGDCVPOjla/emI5c9MhMG7O4WEEmoSdPbmraPw66YZD6uLyhV4DPHbiDWRzXWnClHSyjB9rky9 lausFxogvu4l9H+KDsXIadNDWdLdu1/enS/wDd9zh5S78rY2jeXaG4mnf4seEKamZ7KQ6FIHrcyP ezdDzssPQcTQcGRMQzCn6wP3tlGk7rsfmyHMlFqdRoNNv+ZER/OkmZFPW655zRfbMi0vtrqK2Awm 9ggobb1oktfd9PPNXMUY+DNVlgR2G7jLnenSoQausLUm0pHoNE8TWFv851Y6SOYnvn488sP1Tki5 F3rKwclawQFHUXTCQw+QSh9ay8xgnNZfH+u9NY7w3gPoeKBOAFcBc2BtzcgekeWS8qgEmm2/oNFV G0ivPQbRx8FjRKbuF7g3YhgNZZ0ac8FneuUtJ2PkSIFTZhaAiC0utvxk0ndmWFiW4acEkMZGrLaM L2zWNjrqwsD2zsFNBGiDvXgBEADCXQy1n7wjRxG12DOVADawjghKcG+5LtEf31WftHKLFbp/HArj BhkT6mj+CCI1ClqY+FYU5CK/s0ScMfLxRGLZ0Ktzawb78vOgBVFT3yB1yWBTewsAXdqNqRooaUNo 8cG/NNJLjhccH/7PO/FWX5qftOVUJ/AIsAhKQJ18Tc8Ik73v427EDxuKb9mTAnYQFA3Ev3hAiVbO 6Rv39amVOfJ8sqwiSUGidj2Fctg2aB5JbeMln0KCUbTD1LhEFepeKypfofAXQbGwaCjAhmkWy/q3 IT1mUrPxOngbxdRoOx1tGUC0HCMUW1sFaJgQPMmDcR0JGPOpgsKnitsSnN7ShcCr1buel7vLnUMD +TAZ5opdoF6HjAvAnBQaijtK6minkrM0seNXnCg0KkV8xhMNa6zCs1rq4GgjNLJue2EmuyHooHA4 7JMoLVHcxVeuNTp6K2+XRx0Pk4e2Lj8IVy9yEYyrywEOC5XRW37KJjsiOAsumi1rkvM7QREWgUDe Xs0+RpxI3QrrANh71fLMRo7LKRF3Gvw13NVCCC9ea20P4PwhgWKStkwO2NO+YJsAoS1QycMi/vKu 0EHhknYXamaSV50oZzHKmX56vEeJHTcngrM8R1SwJCYopCx9gkz90bTVYlitJa5hloWTYeMD7FNj Y6jfVSzgM/K4gMgUNDW/PPGeMwARAQABwsF2BBgBCAAgFiEEgnQYxPSsWOdyMMRzNHYf+OetQ9IF AmiDvXgCGwwACgkQNHYf+OetQ9LHDBAAhk+ab8+WrbS/b1/gYW3q1KDiXU719nCtfkUVXKidW5Ec Idlr5HGt8ilLoxSWT2Zi368iHCXS0WenGgPwlv8ifvB7TOZiiTDZROZkXjEBmU4nYjJ7GymawpWv oQwjMsPuq6ysbzWtOZ7eILx7cI0FjQeJ/Q2baRJub0uAZNwBOxCkAS6lpk5Fntd2u8CWmDQo4SYp xeuQ+pwkp0yEP30RhN2BO2DXiBEGSZSYh+ioGbCHQPIV3iVj0h6lcCPOqopZqyeCfigeacBI0nvN jHWz/spzF3+4OS+3RJvoHtAQmProxyGib8iVsTxgZO3UUi4TSODeEt0i0kHSPY4sCciOyXfAyYoD DFqhRjOEwBBxhr+scU4C1T2AflozvDwq3VSONjrKJUkhd8+WsdXxMdPFgBQuiKKwUy11mz6KQfcR wmDehF3UaUoxa+YIhWPbKmycxuX/D8SvnqavzAeAL1OcRbEI/HsoroVlEFbBRNBZLJUlnTPs8ZcU 4+8rq5YX1GUrJL3jf6SAfSgO7UdkEET3PdcKFYtS+ruV1Cp5V0q4kCfI5jk25iiz8grM2wOzVSsc l1mEkhiEPH87HP0whhb544iioSnumd3HJKL7dzhRegsMizatupp8D65A2JziW0WKopa1iw9fti3A aBeNN4ijKZchBXHPgVx+YtWRHfcm4l8= OpenPGP: url=https://posteo.de/keys/markus.probst@posteo.de.asc; 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 basic led classdev abstractions to register and unregister leds * add basic led classdev abstractions to register and unregister multicolor leds Changes since v9: * add missing periods in documentation * duplicate `led::Device` and `led::Adapter` instead of using a complex trait * fix imports not using prelude * adapt to CStr change * documented `led::Color::Multi` and `led::Color::Rgb` Changes since v8: * accept `Option>` in `led::InitData::fwnode()` * make functions in `MultiColorSubLed` const * drop the "rust: Add trait to convert a device reference to a bus device reference" patch, as it has been picked into driver-core Changes since v7: * adjusted import style * added classdev parameter to callback functions in `LedOps` * implement `led::Color` * extend `led::InitData` with - initial_brightness - default_trigger - default_color * split generic and normal led classdev abstractions up (see patch 3/4) * add multicolor led class device abstractions (see patch 4/4) * added MAINTAINERS entry 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 Signed-off-by: Markus Probst --- Markus Probst (3): rust: leds: add basic led classdev abstractions rust: leds: split generic and normal led classdev abstractions up rust: leds: add multicolor classdev abstractions MAINTAINERS | 8 + rust/bindings/bindings_helper.h | 1 + rust/kernel/led.rs | 300 +++++++++++++++++++++++++++++++ rust/kernel/led/multicolor.rs | 384 ++++++++++++++++++++++++++++++++++++++++ rust/kernel/led/normal.rs | 223 +++++++++++++++++++++++ rust/kernel/lib.rs | 1 + 6 files changed, 917 insertions(+) --- base-commit: 9ace4753a5202b02191d54e9fdf7f9e3d02b85eb change-id: 20251114-rust_leds-a959f7c2f7f9 -----BEGIN PGP SIGNATURE----- iQJPBAABCAA5FiEEgnQYxPSsWOdyMMRzNHYf+OetQ9IFAmlcaKAbFIAAAAAABAAO bWFudTIsMi41KzEuMTEsMiwyAAoJEDR2H/jnrUPSBEUP/33pKBKvhSWu8N/AOXvw umj6JGGpUjRxhrcsuD7S1J4sdGrr2CHg8zCD6OYKlmCY5mEi/7tS9MtdZHnYAv35 etsYgGpJZOn0yb+anoE2jP2ks0nNUSR3ZN4he+BizrKr0jjeljrgezyAV9vvb6to sQDSMSnsJEcORBtIUZn8ONTJb2lbmKzgnrGc1xS7oXiMOO2mEt4A3m6zPuT0kzzd l2Wtu2N0Sc28TWJHC3c10h6o0ZSUQrduNcFjHe/KmCXTJLV0ozdmKCMiyNvzYbEK 0/ch4T8SFVNu3qAJIX2H4ceWXnl3QSaFrcv5FRFA1SRySF6sNa3G2Dssu8CX9HrW yqpX0USXDXPAL1p+nnsKwAF4LE0xr+hEicaRZhezQGxkm7DsPmJrwAtRRvmog5OS a/0C2H/j6h/Zm7Y43ttME4krkTyx3ZdN1mVLZPOo9ednUzU4OYaMruwADr2jsLNH DiVBcgjIbuWpDAFx0+ApEHmfzpkAlSZz4MYE+Ny0vrXbUyvipx+rLuQJvuFI8wp0 24T9/femehee5b4hzkhnCdZ06JqnO8yVSseMVHTWrjyYtsUdkm75kWdn0ixRJrxR MgsKnEjIOAQLQC1i174+FBi/QbTz4TeTKKEYaYlWX0TQ9kyCDvjb9aQzpg9SjQGq EWc8LddS+CRAAd3V3DrLSOTh =zjT9 -----END PGP SIGNATURE----- -- Markus Probst