{"id":2222424,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2222424/?format=json","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=json","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=json","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=json","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 ","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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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 , Pavel Machek ,\n Greg Kroah-Hartman ,\n Dave Ertman , Ira Weiny ,\n Leon Romanovsky , Miguel Ojeda ,\n Alex Gaynor , Gary Guo ,\n\t=?utf-8?q?Bj=C3=B6rn_Roy_Baron?= ,\n Benno Lossin , Andreas Hindborg ,\n Alice Ryhl , Trevor Gross ,\n Danilo Krummrich , \"Rafael J. Wysocki\" ,\n Bjorn Helgaas ,\n =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= ,\n Boqun Feng , Boqun Feng ","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 ","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; a=openpgp;\n fpr=827418C4F4AC58E77230C47334761FF8E7AD43D2","Autocrypt":"addr=markus.probst@posteo.de; prefer-encrypt=mutual;\n keydata=xsFNBGiDvXgBEADAXUceKafpl46S35UmDh2wRvvx+UfZbcTjeQOlSwKP7YVJ4JOZrVs93qReNLkO\n WguIqPBxR9blQ4nyYrqSCV+MMw/3ifyXIm6Pw2YRUDg+WTEOjTixRCoWDgUj1nOsvJ9tVAm76Ww+\n /pAnepVRafMID0rqEfD9oGv1YrfpeFJhyE2zUw3SyyNLIKWD6QeLRhKQRbSnsXhGLFBXCqt9k5JA\n RhgQof9zvztcCVlT5KVvuyfC4H+HzeGmu9201BVyihJwKdcKPq+n/aY5FUVxNTgtI9f8wIbmfAja\n oT1pjXSp+dszakA98fhONM98pOq723o/1ZGMZukyXFfsDGtA3BB79HoopHKujLGWAGskzClwTjRQ\n xBqxh/U/lL1pc+0xPWikTNCmtziCOvv0KA0arDOMQlyFvImzX6oGVgE4ksKQYbMZ3Ikw6L1Rv1J+\n FvN0aNwOKgL2ztBRYscUGcQvA0Zo1fGCAn/BLEJvQYShWKeKqjyncVGoXFsz2AcuFKe1pwETSsN6\n OZncjy32e4ktgs07cWBfx0v62b8md36jau+B6RVnnodaA8++oXl3FRwiEW8XfXWIjy4umIv93tb8\n 8ekYsfOfWkTSewZYXGoqe4RtK80ulMHb/dh2FZQIFyRdN4HOmB4FYO5sEYFr9YjHLmDkrUgNodJC\n XCeMe4BO4iaxUQARAQABzRdtYXJrdXMucHJvYnN0QHBvc3Rlby5kZcLBkQQTAQgAOxYhBIJ0GMT0\n rFjncjDEczR2H/jnrUPSBQJog714AhsDBQsJCAcCAiICBhUKCQgLAgQWAgMBAh4HAheAAAoJEDR2\n H/jnrUPSgdkQAISaTk2D345ehXEkn5z2yUEjaVjHIE7ziqRaOgn/QanCgeTUinIv6L6QXUFvvIfH\n 1OLPwQ1hfvEg9NnNLyFezWSy6jvoVBTIPqicD/r3FkithnQ1IDkdSjrarPMxJkvuh3l7XZHo49GV\n HQ8i5zh5w4YISrcEtE99lJisvni2Jqx7we5tey9voQFDyM8jxlSWv3pmoUTCtBkX/eKHJXosgsuS\n B4TGDCVPOjla/emI5c9MhMG7O4WEEmoSdPbmraPw66YZD6uLyhV4DPHbiDWRzXWnClHSyjB9rky9\n lausFxogvu4l9H+KDsXIadNDWdLdu1/enS/wDd9zh5S78rY2jeXaG4mnf4seEKamZ7KQ6FIHrcyP\n ezdDzssPQcTQcGRMQzCn6wP3tlGk7rsfmyHMlFqdRoNNv+ZER/OkmZFPW655zRfbMi0vtrqK2Awm\n 9ggobb1oktfd9PPNXMUY+DNVlgR2G7jLnenSoQausLUm0pHoNE8TWFv851Y6SOYnvn488sP1Tki5\n F3rKwclawQFHUXTCQw+QSh9ay8xgnNZfH+u9NY7w3gPoeKBOAFcBc2BtzcgekeWS8qgEmm2/oNFV\n G0ivPQbRx8FjRKbuF7g3YhgNZZ0ac8FneuUtJ2PkSIFTZhaAiC0utvxk0ndmWFiW4acEkMZGrLaM\n L2zWNjrqwsD2zsFNBGiDvXgBEADCXQy1n7wjRxG12DOVADawjghKcG+5LtEf31WftHKLFbp/HArj\n BhkT6mj+CCI1ClqY+FYU5CK/s0ScMfLxRGLZ0Ktzawb78vOgBVFT3yB1yWBTewsAXdqNqRooaUNo\n 8cG/NNJLjhccH/7PO/FWX5qftOVUJ/AIsAhKQJ18Tc8Ik73v427EDxuKb9mTAnYQFA3Ev3hAiVbO\n 6Rv39amVOfJ8sqwiSUGidj2Fctg2aB5JbeMln0KCUbTD1LhEFepeKypfofAXQbGwaCjAhmkWy/q3\n IT1mUrPxOngbxdRoOx1tGUC0HCMUW1sFaJgQPMmDcR0JGPOpgsKnitsSnN7ShcCr1buel7vLnUMD\n +TAZ5opdoF6HjAvAnBQaijtK6minkrM0seNXnCg0KkV8xhMNa6zCs1rq4GgjNLJue2EmuyHooHA4\n 7JMoLVHcxVeuNTp6K2+XRx0Pk4e2Lj8IVy9yEYyrywEOC5XRW37KJjsiOAsumi1rkvM7QREWgUDe\n Xs0+RpxI3QrrANh71fLMRo7LKRF3Gvw13NVCCC9ea20P4PwhgWKStkwO2NO+YJsAoS1QycMi/vKu\n 0EHhknYXamaSV50oZzHKmX56vEeJHTcngrM8R1SwJCYopCx9gkz90bTVYlitJa5hloWTYeMD7FNj\n Y6jfVSzgM/K4gMgUNDW/PPGeMwARAQABwsF2BBgBCAAgFiEEgnQYxPSsWOdyMMRzNHYf+OetQ9IF\n AmiDvXgCGwwACgkQNHYf+OetQ9LHDBAAhk+ab8+WrbS/b1/gYW3q1KDiXU719nCtfkUVXKidW5Ec\n Idlr5HGt8ilLoxSWT2Zi368iHCXS0WenGgPwlv8ifvB7TOZiiTDZROZkXjEBmU4nYjJ7GymawpWv\n oQwjMsPuq6ysbzWtOZ7eILx7cI0FjQeJ/Q2baRJub0uAZNwBOxCkAS6lpk5Fntd2u8CWmDQo4SYp\n xeuQ+pwkp0yEP30RhN2BO2DXiBEGSZSYh+ioGbCHQPIV3iVj0h6lcCPOqopZqyeCfigeacBI0nvN\n jHWz/spzF3+4OS+3RJvoHtAQmProxyGib8iVsTxgZO3UUi4TSODeEt0i0kHSPY4sCciOyXfAyYoD\n DFqhRjOEwBBxhr+scU4C1T2AflozvDwq3VSONjrKJUkhd8+WsdXxMdPFgBQuiKKwUy11mz6KQfcR\n wmDehF3UaUoxa+YIhWPbKmycxuX/D8SvnqavzAeAL1OcRbEI/HsoroVlEFbBRNBZLJUlnTPs8ZcU\n 4+8rq5YX1GUrJL3jf6SAfSgO7UdkEET3PdcKFYtS+ruV1Cp5V0q4kCfI5jk25iiz8grM2wOzVSsc\n l1mEkhiEPH87HP0whhb544iioSnumd3HJKL7dzhRegsMizatupp8D65A2JziW0WKopa1iw9fti3A\n aBeNN4ijKZchBXHPgVx+YtWRHfcm4l8=","OpenPGP":"url=https://posteo.de/keys/markus.probst@posteo.de.asc;\n preference=encrypt"},"content":"Add the `led::Mode` trait to allow for other types of led class devices\nin `led::LedOps`.\n\nSigned-off-by: Markus Probst \n---\n rust/kernel/led.rs | 28 ++++++++++++++++++++++++----\n rust/kernel/led/normal.rs | 24 ++++++++++++++++--------\n 2 files changed, 40 insertions(+), 12 deletions(-)","diff":"diff --git a/rust/kernel/led.rs b/rust/kernel/led.rs\nindex 1fba512a804c..5035563d68a3 100644\n--- a/rust/kernel/led.rs\n+++ b/rust/kernel/led.rs\n@@ -35,7 +35,7 @@\n \n mod normal;\n \n-pub use normal::Device;\n+pub use normal::{Device, Normal};\n \n /// The name of the led is determined by the driver.\n pub enum Named {}\n@@ -177,6 +177,7 @@ pub fn name(self, name: &'a CStr) -> Self {\n /// #[vtable]\n /// impl led::LedOps for MyLedOps {\n /// type Bus = platform::Device;\n+/// type Mode = led::Normal;\n /// const BLOCKING: bool = false;\n /// const MAX_BRIGHTNESS: u32 = 255;\n ///\n@@ -209,6 +210,11 @@ pub trait LedOps: Send + 'static + Sized {\n #[allow(private_bounds)]\n type Bus: AsBusDevice;\n \n+ /// The led mode to use.\n+ ///\n+ /// See [`Mode`].\n+ type Mode: Mode;\n+\n /// If set true, [`LedOps::brightness_set`] and [`LedOps::blink_set`] must perform the\n /// operation immediately. 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,\n+ classdev: &::Device,\n brightness: u32,\n ) -> Result<()>;\n \n /// Gets the current brightness level.\n- fn brightness_get(&self, dev: &Self::Bus, classdev: &Device) -> u32 {\n+ fn brightness_get(\n+ &self,\n+ dev: &Self::Bus,\n+ classdev: &::Device,\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) -> u32 {\n fn blink_set(\n &self,\n dev: &Self::Bus,\n- classdev: &Device,\n+ classdev: &::Device,\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 {\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>;\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> = Device;\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 {\n+pub struct Device> {\n #[pin]\n ops: T,\n #[pin]\n@@ -19,7 +27,7 @@ pub struct Device {\n \n impl<'a, S: DeviceBuilderState> DeviceBuilder<'a, S> {\n /// Registers a new [`Device`].\n- pub fn build(\n+ pub fn build>(\n self,\n parent: &'a T::Bus,\n ops: impl PinInit + 'a,\n@@ -89,7 +97,7 @@ pub fn build(\n }\n }\n \n-impl Device {\n+impl> Device {\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 {\n }\n \n // SAFETY: A `led::Device` can be unregistered from any thread.\n-unsafe impl Send for Device {}\n+unsafe impl + Send> Send for Device {}\n \n // SAFETY: `led::Device` can be shared among threads because all methods of `led::Device`\n // are thread safe.\n-unsafe impl Sync for Device {}\n+unsafe impl + Sync> Sync for Device {}\n \n-struct Adapter {\n+struct Adapter> {\n _p: PhantomData,\n }\n \n-impl Adapter {\n+impl> Adapter {\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 Adapter {\n }\n \n #[pinned_drop]\n-impl PinnedDrop for Device {\n+impl> PinnedDrop for Device {\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"]}