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GET /api/1.2/patches/2231896/?format=api
{ "id": 2231896, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2231896/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260501-rust_leds-v16-2-9f329fdedcd9@posteo.de/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.2/projects/28/?format=api", "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-v16-2-9f329fdedcd9@posteo.de>", "list_archive_url": null, "date": "2026-05-01T14:36:05", "name": "[v16,2/3] rust: leds: add Mode trait", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "23945a73d8ddc940873f597a0ddace09f438a80a", "submitter": { "id": 91819, "url": "http://patchwork.ozlabs.org/api/1.2/people/91819/?format=api", "name": "Markus Probst", "email": "markus.probst@posteo.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260501-rust_leds-v16-2-9f329fdedcd9@posteo.de/mbox/", "series": [ { "id": 502466, "url": "http://patchwork.ozlabs.org/api/1.2/series/502466/?format=api", "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/patches/2231896/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231896/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-53576-incoming=patchwork.ozlabs.org@vger.kernel.org>", "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=lMnSkLCg;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c09:e001:a7::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1777646172; c=relaxed/simple;\n\tbh=E3bzm3QfblHpymqQiQxNq+2D7OfbgIrNy1j3vjDCsY8=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=nhY24++YEnZfOtGUTyH+qkKWs3AOwIcUZz++JBMQWwzA2HWWdzRXrXkg7Q2QRp0pgV5sgqyr3n969FAiQbfMlYPT8DWIiFVZIvEKST5M6uxqNyCM9l3VfPHEVh1x2DbNYFkz6LLIy+IZthZwD7om8t41qXffxYxLyeDSZR7SvN0=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=posteo.de;\n spf=pass smtp.mailfrom=posteo.de;\n dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de\n header.b=lMnSkLCg; arc=none smtp.client-ip=185.67.36.66", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017;\n\tt=1777646166; bh=ACUzYLr3qqQMmbokYLGbria4mjdatKFkWDd5VxD8PSs=;\n\th=From:Date:Subject:MIME-Version:Content-Type:\n\t Content-Transfer-Encoding:Message-Id:To:Cc:Autocrypt:OpenPGP:From;\n\tb=lMnSkLCgQDUSA/5TDV0o6DEBihB4O8d8m4bdlFo1WwwW0XNQxi8SpDSfaGRsTgcHB\n\t 5BEsaQVlaR81efRPN8W9qkc43hP14Lb41z0PVAjPoOkrnWdkXMLxo9ZwoZFe3wNrAr\n\t dQ5VbvdM/PS4Jvdfc9b1x6XIGLzR6DTMHlZu8UcmjkmOZDTGBBqHjcv4tPyZyhhFtW\n\t Kc20jKCmP2g0EDt54FKt/Ic46hrnxCH/Swu9/k2h4b7oTSkYXrEJp1VnWL/+kDSrwL\n\t el/6zbIjrPJP0zxQ+86vlEKKcSvqdnJ9uOTuPvbycKCfzmx5hp9hVrli7U7bs4TP3b\n\t /v4T6LGnpp/Mw==", "From": "Markus Probst <markus.probst@posteo.de>", "Date": "Fri, 01 May 2026 14:36:05 +0000", "Subject": "[PATCH v16 2/3] rust: leds: add Mode trait", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260501-rust_leds-v16-2-9f329fdedcd9@posteo.de>", "References": "<20260501-rust_leds-v16-0-9f329fdedcd9@posteo.de>", "In-Reply-To": "<20260501-rust_leds-v16-0-9f329fdedcd9@posteo.de>", "To": "Lee Jones <lee@kernel.org>, Pavel Machek <pavel@kernel.org>,\n Greg Kroah-Hartman <gregkh@linuxfoundation.org>,\n Dave Ertman <david.m.ertman@intel.com>, Ira Weiny <ira.weiny@intel.com>,\n Leon Romanovsky <leon@kernel.org>, Miguel Ojeda <ojeda@kernel.org>,\n Alex Gaynor <alex.gaynor@gmail.com>, Gary Guo <gary@garyguo.net>,\n\t=?utf-8?q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>,\n Benno Lossin <lossin@kernel.org>, Andreas Hindborg <a.hindborg@kernel.org>,\n Alice Ryhl <aliceryhl@google.com>, Trevor Gross <tmgross@umich.edu>,\n Danilo Krummrich <dakr@kernel.org>, \"Rafael J. Wysocki\" <rafael@kernel.org>,\n Bjorn Helgaas <bhelgaas@google.com>,\n =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= <kwilczynski@kernel.org>,\n Boqun Feng <boqun@kernel.org>, Boqun Feng <boqun@kernel.org>", "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 <markus.probst@posteo.de>", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=5332;\n i=markus.probst@posteo.de; h=from:subject:message-id;\n bh=E3bzm3QfblHpymqQiQxNq+2D7OfbgIrNy1j3vjDCsY8=;\n b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBp9LpQPk288lLbmRXPjYIv3XlTbqajWBkB1Wi2I\n PMxfPGWaiCJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCafS6UBsUgAAAAAAEAA5t\n YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9Lr/RAAjLKd9iLV4ghqqKSRVJGKIIq2NDZmBlK\n W6JmmWzqQaDNOsr0RBCtofqc4emDZ/IYEyCgYG87YyI0AloIL2hNOT9sZTcIAJ4adMQvrRPDFLC\n 71iDEy6aCJtdVKiLjIthgaOXE4jfcF8sZ4q6j0o4IMpClEDWktpWO3PseBHyokZuLvAfaM/jXsP\n hy8qqUR0JGgvBNxe96jO8KYAE2jgoYQHdFoJio+0+acgZCzbnaOudg0+4bAnxjmpg/nxDA2gjM5\n HLFyoCS4mmTu2VBHh+Uih4kwmmnDfIH69t3OxXPPifvb/P75EnvEMKV11tyUrXTeAJHqakSud6k\n U96fpcN+Yz2nK/wkKGt3rkCg3MFGjjt78JwjmZ58B1VNqWtneqkiXA6UF/7K1s2qS/X/pKqL0ay\n wdBr9Y+qjFKL5FG7VVW6rVH4SvjhJuUgWqRRN4eWPfi1vMOy+egSmLM4HfR3Jka5MgwFPFQ6TCm\n 4QRb0/ynV/ufCYXPTC42VWAhGAeHE2d/y2Z3HgIyMKf6RJB548Meb1UoE7MUrrtku6cvaLQUz5t\n JNHCxBKCRpVxtzGL4/YIb98qoZbzm/yyEwZGZOKOCscAfAabP6k5GNOgYBnSULGv6t1JMsojAKP\n nPS6wCINjDvyZcqKAstBI4FW8/nATRBbnDRqd0GajjpR+FBhvljQ=", "X-Developer-Key": "i=markus.probst@posteo.de; 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If set false, they must not sleep.\n const BLOCKING: bool;\n@@ -206,12 +215,16 @@ pub trait LedOps: Send + Sync + 'static + Sized {\n fn brightness_set(\n &self,\n dev: &Self::Bus,\n- classdev: &Device<Self>,\n+ classdev: &<Self::Mode as Mode>::Device<Self>,\n brightness: u32,\n ) -> Result<()>;\n \n /// Gets the current brightness level.\n- fn brightness_get(&self, dev: &Self::Bus, classdev: &Device<Self>) -> Result<u32> {\n+ fn brightness_get(\n+ &self,\n+ dev: &Self::Bus,\n+ classdev: &<Self::Mode as Mode>::Device<Self>,\n+ ) -> Result<u32> {\n let _ = (dev, classdev);\n build_error!(VTABLE_DEFAULT_ERROR)\n }\n@@ -227,7 +240,7 @@ fn brightness_get(&self, dev: &Self::Bus, classdev: &Device<Self>) -> Result<u32\n fn blink_set(\n &self,\n dev: &Self::Bus,\n- classdev: &Device<Self>,\n+ classdev: &<Self::Mode as Mode>::Device<Self>,\n delay_on: &mut usize,\n delay_off: &mut usize,\n ) -> Result<()> {\n@@ -291,6 +304,16 @@ fn try_from(value: u32) -> core::result::Result<Self, Self::Error> {\n }\n }\n \n+/// The led mode.\n+///\n+/// Each led mode has its own led class device type with different capabilities.\n+///\n+/// See [`Normal`].\n+pub trait Mode: private::Sealed {\n+ /// The class device for the led mode.\n+ type Device<T: LedOps<Mode = Self>>;\n+}\n+\n mod private {\n pub trait Sealed {}\n }\ndiff --git a/rust/kernel/led/normal.rs b/rust/kernel/led/normal.rs\nindex 6715ddf911be..ad69ed85feb0 100644\n--- a/rust/kernel/led/normal.rs\n+++ b/rust/kernel/led/normal.rs\n@@ -6,11 +6,19 @@\n \n use super::*;\n \n+/// The led mode for the `struct led_classdev`. Leds with this mode can only have a fixed color.\n+pub enum Normal {}\n+\n+impl Mode for Normal {\n+ type Device<T: LedOps<Mode = Self>> = Device<T>;\n+}\n+impl private::Sealed for Normal {}\n+\n /// The led class device representation.\n ///\n /// This structure represents the Rust abstraction for a led class device.\n #[pin_data(PinnedDrop)]\n-pub struct Device<T: LedOps> {\n+pub struct Device<T: LedOps<Mode = Normal>> {\n #[pin]\n ops: T,\n #[pin]\n@@ -19,7 +27,7 @@ pub struct Device<T: LedOps> {\n \n impl<'a, S: DeviceBuilderState> DeviceBuilder<'a, S> {\n /// Registers a new [`Device`].\n- pub fn build<T: LedOps>(\n+ pub fn build<T: LedOps<Mode = Normal>>(\n self,\n parent: &'a T::Bus,\n ops: impl PinInit<T, Error> + 'a,\n@@ -88,7 +96,7 @@ pub fn build<T: LedOps>(\n }\n }\n \n-impl<T: LedOps> Device<T> {\n+impl<T: LedOps<Mode = Normal>> Device<T> {\n /// # Safety\n /// `led_cdev` must be a valid pointer to a `led_classdev` embedded within a\n /// `led::Device`.\n@@ -107,17 +115,17 @@ fn parent(&self) -> &device::Device<Bound> {\n }\n \n // SAFETY: A `led::Device` can be unregistered from any thread.\n-unsafe impl<T: LedOps + Send> Send for Device<T> {}\n+unsafe impl<T: LedOps<Mode = Normal> + Send> Send for Device<T> {}\n \n // SAFETY: `led::Device` can be shared among threads because all methods of `led::Device`\n // are thread safe.\n-unsafe impl<T: LedOps + Sync> Sync for Device<T> {}\n+unsafe impl<T: LedOps<Mode = Normal> + Sync> Sync for Device<T> {}\n \n-struct Adapter<T: LedOps> {\n+struct Adapter<T: LedOps<Mode = Normal>> {\n _p: PhantomData<T>,\n }\n \n-impl<T: LedOps> Adapter<T> {\n+impl<T: LedOps<Mode = Normal>> Adapter<T> {\n /// # Safety\n /// `led_cdev` must be a valid pointer to a `led_classdev` embedded within a\n /// `led::Device`.\n@@ -210,7 +218,7 @@ impl<T: LedOps> Adapter<T> {\n }\n \n #[pinned_drop]\n-impl<T: LedOps> PinnedDrop for Device<T> {\n+impl<T: LedOps<Mode = Normal>> PinnedDrop for Device<T> {\n fn drop(self: Pin<&mut Self>) {\n let raw = self.classdev.get();\n // SAFETY: The existence of `self` guarantees that `self.classdev.get()` is a pointer to a\n", "prefixes": [ "v16", "2/3" ] }