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GET /api/patches/2217494/?format=api
{ "id": 2217494, "url": "http://patchwork.ozlabs.org/api/patches/2217494/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260329-rust_leds-v13-2-21a599c5b2d1@posteo.de/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/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": "<20260329-rust_leds-v13-2-21a599c5b2d1@posteo.de>", "list_archive_url": null, "date": "2026-03-29T17:22:35", "name": "[v13,2/3] rust: leds: add Mode trait", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ebddb313737a720d4c160a7e0bc5f5cf49c8e2cf", "submitter": { "id": 91819, "url": "http://patchwork.ozlabs.org/api/people/91819/?format=api", "name": "Markus Probst", "email": "markus.probst@posteo.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260329-rust_leds-v13-2-21a599c5b2d1@posteo.de/mbox/", "series": [ { "id": 497934, "url": "http://patchwork.ozlabs.org/api/series/497934/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=497934", "date": "2026-03-29T17:22:33", "name": "rust: leds: add led classdev abstractions", "version": 13, "mbox": "http://patchwork.ozlabs.org/series/497934/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217494/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217494/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-51388-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=YrMcqWAN;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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Sun, 29 Mar 2026 17:22:46 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 87F7E384258;\n\tSun, 29 Mar 2026 17:22:45 +0000 (UTC)", "from mout01.posteo.de (mout01.posteo.de [185.67.36.65])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 314AD2874E3\n\tfor <linux-pci@vger.kernel.org>; Sun, 29 Mar 2026 17:22:43 +0000 (UTC)", "from submission (posteo.de [185.67.36.169])\n\tby mout01.posteo.de (Postfix) with ESMTPS id ED121240029\n\tfor <linux-pci@vger.kernel.org>; Sun, 29 Mar 2026 19:22:35 +0200 (CEST)", "from customer (localhost [127.0.0.1])\n\tby submission (posteo.de) with ESMTPSA id 4fkLmT3Rb6z9rxK;\n\tSun, 29 Mar 2026 19:22:33 +0200 (CEST)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1774804965; cv=none;\n b=KBctXTBCBJKD0tKLZ0wCtXqKOlV1kON9wmysiB3dM4rxoNzU18lyoRWgTa4xLLjx0GFN902X2ASpLveWXcXcsIP3QXn2uJR44FIi1s+WeYbg/fgMlS0Nq0lRO5Eja05oYpF/xDdg+lFgNkCyMfK1MZYxGb03rL4XA0PBY1UAnNo=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1774804965; c=relaxed/simple;\n\tbh=zdwp4NNgFfvRIvYjtCKYF8YDPW9jE+7dJKS4sgsjRTo=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=RAKN9EJSA2WGMo6zKN8lX2+LR76EXN5KyHZtBv7/kUHx89b2vlyyJfNXqYVNVODRNYDH3eERFDiemLCMl73iZPVFbfeLNubrObNQbNMDLe1FWY8fQrt9Bh+RPjeH9SQ/U/0/56kNFQoQcmJ34jV1a7+VMPL4QpIIqgl/Nttj04o=", "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=YrMcqWAN; arc=none smtp.client-ip=185.67.36.65", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017;\n\tt=1774804955; bh=Pam4GgQs35Wt+h5iJjbhd0iaxYfo7309XAPP4E8NHrQ=;\n\th=From:Date:Subject:MIME-Version:Content-Type:\n\t Content-Transfer-Encoding:Message-Id:To:Cc:Autocrypt:OpenPGP:From;\n\tb=YrMcqWANW7Qr8b4xgY1Uxra81kGDp46M2Y8JpqxBkOjQe8YDKfV2HJW0cTDYfbxTC\n\t MBit4I5WnzQ495dT4NDq8Ab69l6cwd0zevfnbs6BfQ+7YTXcIxOdf5QvTfH6kIzKIt\n\t Nx/LYVzlLuUHmF5KbMLBynvxxtQN6VU9vA5E8wNDtBF33LuUnyUPzsdG1G6XIbT9ln\n\t sPoBCgd4BKO0C/k6kzqieWQeNHVjKatc36GKIFkC1pG3ZBcU5H7nKyQp/dagvNmywK\n\t OD0O9SVJhTeR1+bNIdGkOF/cJQNNcTPsUcsyf+6zpBGmPiYKSpw5ZZjDvnNPY+g81i\n\t T43fE2t6exGxA==", "From": "Markus Probst <markus.probst@posteo.de>", "Date": "Sun, 29 Mar 2026 17:22:35 +0000", "Subject": "[PATCH v13 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": "<20260329-rust_leds-v13-2-21a599c5b2d1@posteo.de>", "References": "<20260329-rust_leds-v13-0-21a599c5b2d1@posteo.de>", "In-Reply-To": "<20260329-rust_leds-v13-0-21a599c5b2d1@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=5273;\n i=markus.probst@posteo.de; h=from:subject:message-id;\n bh=zdwp4NNgFfvRIvYjtCKYF8YDPW9jE+7dJKS4sgsjRTo=;\n b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBpyV/SW/+9IzfZ7Sj25PE0B3nAS+EzyQS0ONje+\n RB2XQX0g3GJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaclf0hsUgAAAAAAEAA5t\n YW51MiwyLjUrMS4xMSwyLDIACgkQNHYf+OetQ9Jr6A//YIX42dTCw2ePYzv71h7/vrcU6PiRvvz\n mN28onD7Mw/CIR6D4mkvmw5mYHg6EcSN5kReWMC3VtLfmoA1s1zW53PB2aGE6UipZHMDgUpNBfa\n nHbhOQ8cwSGfsO2NBLNRq/Ho+3GfB89HHyAzLkdT5fULq+UmK/Q6fMNUqc71BclURxmEtytjqt8\n NkTn7Y+YmEhyWoRZtVe/Ttd8WkM7if22HJ+Lm7CZ33e/+xDgOBDZ81ohHuTVkNgPvZu+AxBoq14\n Vt1spQUwGPAcct+fIK2FMN1XfgtC+VgL/Guw6zer/3h99R/2mN9BjxCEXyvhwrjiW0dondpE2v4\n dgiUllRAqE1SfOH9xaI/mcUYTIErnkZ9hJwY3r6HMpe3GoDbu5WgjAnw0sNrO+ljsy+K2SPxEiV\n gFK6ZMJa43KOxfBye7C7S/LVWE5mTRENDtsUluNj4mDiPcM6iNvynjz16X3IHU4WdIOAo3fVUc8\n d3vcA2JUd5dlfhiACGJt1R3yU/g8U+y12gQkTs1lUkn5o4SPnzGKKjwLWUOvsW5BLyXnDGoHnml\n JcQ8xNZ1FPBIiCmMcwpmTpTO7XvR5Qksb4PpNbNb3bHLAf8jIAztKOHO58wkb8iOpXQ4WShhmmN\n H/xfS0v3GHeHqVHNtQyHN4qAiksOpibYelgBmZNWlFo1c+I3bJZo=", "X-Developer-Key": "i=markus.probst@posteo.de; 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If set false, they must not sleep.\n const BLOCKING: bool;\n@@ -221,12 +227,16 @@ pub trait LedOps: Send + '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>) -> u32 {\n+ fn brightness_get(\n+ &self,\n+ dev: &Self::Bus,\n+ classdev: &<Self::Mode as Mode>::Device<Self>,\n+ ) -> u32 {\n let _ = (dev, classdev);\n build_error!(VTABLE_DEFAULT_ERROR)\n }\n@@ -242,7 +252,7 @@ fn brightness_get(&self, dev: &Self::Bus, classdev: &Device<Self>) -> 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@@ -305,6 +315,16 @@ 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 bd239f186c64..dda247145f25 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@@ -89,7 +97,7 @@ 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@@ -203,7 +211,7 @@ 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": [ "v13", "2/3" ] }