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 5A73132277B for ; Tue, 6 Jan 2026 01:42:58 +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=1767663780; cv=none; b=KmX531T6UEFMa955bmYSypeTYVkCzs7OU+ob3ZQdq/3VlhmdOgkMqKXj8kaWlZDSotNX9YofAdhWj1XorltxpszAobaG5mL9I6Z3IT2QGb79EtwSGpAESQmZIMSwcMgaorRYaTIFKifUcLZ75+xSp3tBhkTINUb2nKNvoAMKU4I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767663780; c=relaxed/simple; bh=8MSE3Yb96JSZ/BcM2wM0bdHrKhTNa23LItYGHcA+xiM=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=eUF6/JWckKYySeSFqKJkzku+HVXDbsxn8/7Up7xHbCXACsKx/+T/OEjGvdDdYBQ++UjGhi3HYMg1AFOq6F+YZ8siKrIB7L7iHMnv1EhgdiAPtCc1PVkfgFYZs0wmCk8WJ0JnS5rSub7wMNdcTfrb4ZEMXBXByCeFa/rB5M27G4w= 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=K7OwsQsv; 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="K7OwsQsv" Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 29322240027 for ; Tue, 6 Jan 2026 02:42:51 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1767663771; bh=JMPEtJXwdE0+nP9UAdzxiJcf272bDj8c9U2R9zT0DpY=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type: Content-Transfer-Encoding:To:Cc:Autocrypt:OpenPGP:From; b=K7OwsQsv+P67Sefd3M0IiG2QbnEkyEW4F7a/JDuNzb3cfv5iQLMQRYiha0ZYQvzRn ofvxSxou5qBpAH+4sVLZpqiZqUfkKcjRd/fq1rT08Vhg0ZOr46UlFjrL7KJ/Pq88rF bIfuD+ouyrng9qPdqKyCUqX6TefV1oIaP8c0oxJL5Jwohe+nBqG3M41218CWKUJxzf wZwsLEgwhl7TPwVhAEkLzyX7hffWLspR0IHyJZ7aDYZhXoD22yEe/EphxYR4HoPPOV 3wo9/3SZQ2PfzUpUtgRLFgIOJN/7xENyBcB6914K3aTksgT9Jok2ysm5Ik2WmVoB2R rMWeXrxouZ1jg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4dlYnz5jWpz6twB; Tue, 6 Jan 2026 02:42:47 +0100 (CET) From: Markus Probst Subject: [PATCH v10 0/3] rust: leds: add led classdev abstractions Date: Tue, 06 Jan 2026 01:42:50 +0000 Message-Id: <20260106-rust_leds-v10-0-e0a1564884f9@posteo.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-B4-Tracking: v=1; b=H4sIAIhoXGkC/02MUQuDIBRG/0r4PIe3srx72v8YY0helzAytMlG9 N9nwcDH7/Cds7JIwVFkl2plgZKLzk95gDhVbBj19CTuTAasFrUEgJaHd1weLzKRa5Ro+6G2vUW W/3Mg6z5H7HbPe3Rx8eF7tJPa6b8ii0pSXHCDugXbSCkbdZ19XMifDbG9krA0sTQxm6obQBoNK LqmNLdt+wESpvE73QAAAA== X-Change-ID: 20251114-rust_leds-a959f7c2f7f9 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=3834; i=markus.probst@posteo.de; h=from:subject:message-id; bh=8MSE3Yb96JSZ/BcM2wM0bdHrKhTNa23LItYGHcA+xiM=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBpXGiX16CU7jkRK9hAvyEsOfQiyU9YZ3niezWDg IRccCTDgR+JAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaVxolxsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMSwyLDIACgkQNHYf+OetQ9KouhAAhYAVE1gszuAg9GbUtYUDSG9oVJWk/i+ 4qo0OaLNSqnxz4tpeihlkDi768OFkSc1bCiYy+8vM+KicZmvzTWqlfIs1pWD0fLBSYq4Ydo20nY pwso3gIxXWGxlhpocaWHL/PU6lI9y1WBr9lvo2+2B13wXqRekYNli6Gp4NgH8BvJN/C/9+nns9w x+ohNcanBBlOjpda+NHfwxx61g3MjvRtY0xMZhY7JaoRo7Dy+bvO+oT8fdxs7OWxy6UxE4CCaaq 9xM/2i8udBayxNamIX61caHFf8dyKDxrgq6aLVqRdb4nt9reIZLVGkEgam3qdmyiUwJ6PFrCdRa V7kRlGxr/cnomGleBpvIHLDMMf/w2U88L7HBKe01KjN5NOD53OhmPwNLJZpA8mAhegeUe6avkbl NOG3mNl3pH3azctb3hydqYxg03+6ZuAxvtuntFaSAnBDvAzOW1T6rURHQo0pz/ievcs24JwRNG9 wV45Xa7Ujz0q+iYLRUZAYWieVTaW4hH75WDgBTAJV9ST0H3nHagi4Ujhq5wV/wfnULT6tXXEnbo fdNbtOQoOPeOZhxn+RvC6b8oyyXmKLOgDza9qzFFDa2KEZuOjLNlZ01ynfPCAFx9134O1OWUyuL fXSUUKjTBLA0A8JVcIJ1EwhLGV6Si7OUmWzlQoZffqcnFZ0xuc5k= 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