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GET /api/1.1/patches/2222424/?format=api
{ "id": 2222424, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2222424/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260411-rust_leds-v13-2-1208a2821deb@posteo.de/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.1/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 }, "msgid": "<20260411-rust_leds-v13-2-1208a2821deb@posteo.de>", "date": "2026-04-11T15:07:22", "name": "[RESEND,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/1.1/people/91819/?format=api", "name": "Markus Probst", "email": "markus.probst@posteo.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260411-rust_leds-v13-2-1208a2821deb@posteo.de/mbox/", "series": [ { "id": 499561, "url": "http://patchwork.ozlabs.org/api/1.1/series/499561/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=499561", "date": "2026-04-11T15:07:19", "name": "rust: leds: add led classdev abstractions", "version": 13, "mbox": "http://patchwork.ozlabs.org/series/499561/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2222424/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2222424/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-pci+bounces-52398-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=c8n+9q4F;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775920059; 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=ZEck7ZzdRD+L1u3B1upEX/rR0+s3SmeLxo00VxbQ8t/YWQ1j3DRiPbyw5IOZ2PwrNHkeNPZRuF0la6bQyBTQ8nqN92t4vvu3kWKU36chVioGryBMfpSpitBrX7mtTp1BX84etDmw086kTG7Dp/Un2IWdcpU0BVk69kPYQbUI+1I=", "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=c8n+9q4F; 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=1775920043; 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=c8n+9q4FrnPBy8ptW/cU+3tDtU7dTAjiQQvudIc1ISqkaemfi8Rzhn6Sk6nZlyOYr\n\t cQR3Z89VlMqPNML3QJ3ezTQuajWj50aNN/MJyQ+LM7Me2Sv8waE02/PFNtUzfO27KB\n\t hUp4nDfOXGNBCrz3EXX+D1Iw47rJTOe2GK6icG70atLnltXBnljPShaLFSAmufsy6h\n\t CDuHAdnMAvpubRWXv9oZ93SjtzXucDU3tx/g/ZeboZkUKYLFLPY/TrplFwoU7tjlMF\n\t aWl3don6kP/TOoFHDeQc/oo6jFvOpg68xG4JwM02gWkrow73TYTXQH0JNkF6l2FxDW\n\t fyw2LyO20gbNQ==", "From": "Markus Probst <markus.probst@posteo.de>", "Date": "Sat, 11 Apr 2026 15:07:22 +0000", "Subject": "[PATCH RESEND 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": "<20260411-rust_leds-v13-2-1208a2821deb@posteo.de>", "References": "<20260411-rust_leds-v13-0-1208a2821deb@posteo.de>", "In-Reply-To": "<20260411-rust_leds-v13-0-1208a2821deb@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/jnrUPSAcsmYgBp2mOlLQ5bKhScemCDJhuKDcnJhm5A7Zy7SZeAP\n VAtJ4XEw6GJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCadpjpRsUgAAAAAAEAA5t\n YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9JZ7xAArkYd6PmVaL0Px4aTB0gyFOgfiw+VCO0\n EfrZL5bfjUSIP4dKpRo/+49xK+I0uMAVZL12FzR3Nll9F29FWTPD7E+AtnNBuWBoSTUuXF6gxHb\n NC4enp135w645pEgkMedJJNq2HjT/zmNovmH2O5x7fnoIQCZb8a8G169ZV4nW6uQM0GYpvqd/6b\n ofw/F7NAvOuV9kqQxnNNN1m7yWFTU+HmGJayswzcSWAzROdKvdPfDXk4DgFzo5M+8pnC36ELsFY\n 7S23BIJlfWr+IEKEixaNCJv8Jb1+ElCHg2UbxqGGW5gerWjYbPJU+PHhj9RSSgvQhS/81UaXjl0\n ux80wcZpyqmxLDOgR5sM2k+z2JsGzy8/jgYTQvkNhPTlC3WZxVg28Z3hN0JJQkBiufkGrxVlnDf\n oNgDIAMM4cDgoY/q4aPlzFl/7TKe+o5LEELiAraJG7gTIM+q+RJfeFWi1JiFHwNHCsJWLJPENOR\n jSdT7UmxAtVWgTW4QupGWCFplXrA8rU9t7aTuIYAzQTRAdrkDEw9yN4AvR5GEQEh/Rn3oL2jSX+\n rVJxxy0q/tisD7/hOR9qgXmhbSXSbncEob3d3rNGR8DHC2K7rQAlQ/eZG8pEZqMSwOSWMG3fUzC\n 5yMG5TMm5JFZgtg+fIOqyna78xBNauAAra24LiIB03jr/kPqb40s=", "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": [ "RESEND", "v13", "2/3" ] }