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 3DF493B8BCC for ; Wed, 15 Jul 2026 21:00:22 +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=1784149225; cv=none; b=ar/JKfADamOBNHe2xRB4wPKlDg0Z/M+JQDTJq41RXnp0iMbfveWdX8BVMpOAKwSXSWkpPxoc1TpJCTNwFPs79Xy7mItfUq5gX32iTDfPmGnE21tNikEX1hmEhOOqR+ToHyzEGDYpsIySkMXKyPa9IAIw9R2IsXAIplTZ1y/VIQA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784149225; c=relaxed/simple; bh=QWIn30TMvT1lmgc9+8mNgqULSX/wvgFHQj1GFajrCx4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=MPjd0gOgeerfsOYTM017g4LzWr49jmYlPDTPfHgJMWV32vpu0pnO+nzwThP0wyG7A73F+IFuZpA/APbPAIX3DweuUQtKTCQNlbnghZfibvLubojHV2aAunf8dOOMIe4RuzEmIKKslGJgovml1FwExERq9hJNCtquZFYxFTHGddw= 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=C4BZQgb2; 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="C4BZQgb2" Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 9A3E2240027 for ; Wed, 15 Jul 2026 23:00:20 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=1984.8680eb; t=1784149220; bh=q4s4EmOrWKz90kwhMtLK3K0YPhABFNhnfpVflHhZGjo=; h=From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:To:Cc:Autocrypt:OpenPGP:From; b=C4BZQgb2AlDVu1WK98L1YuVrdWUQh8IjcCkwsLQPDNFUFio7ywxJXjyu+evNu1CfD gBr2Lru6yApc4/bwq5XUuSsyzSwNv2IoNkCUXJBa5CdRIyjLfKwwqMhPAze5c3G5G8 eQuw/PeNJ+nwQeS/+y1Y+blMLZd/t2fybVs72+1a4VtZQcMsuPtUbd5Y200Dpxp/Pp HitcX963NQLhIJmcXj47/zHWMBw76KVomAQrKMnU2HRzFknxxXG6hnRUSOHKmlzfxG tHSj+QFfzfY0B4j0MUqzo/RCJK+2Xqffxlzn6+Z46bOg7k3xzO3/TsyDg7GlF+tP7i n8lhE10yBaaGw== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4h0pTs4w96z6tyw; Wed, 15 Jul 2026 23:00:17 +0200 (CEST) From: Markus Probst Date: Wed, 15 Jul 2026 21:00:19 +0000 Subject: [PATCH v14 2/3] samples: rust: add Rust serial device bus sample device driver Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260715-rust_serdev-v14-2-b4ed5c93606f@posteo.de> References: <20260715-rust_serdev-v14-0-b4ed5c93606f@posteo.de> In-Reply-To: <20260715-rust_serdev-v14-0-b4ed5c93606f@posteo.de> To: Rob Herring , Greg Kroah-Hartman , Jiri Slaby , Miguel Ojeda , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Kari Argillander , "Rafael J. Wysocki" , Viresh Kumar , Boqun Feng , David Airlie , Simona Vetter , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= , Boqun Feng Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-pm@vger.kernel.org, driver-core@lists.linux.dev, dri-devel@lists.freedesktop.org, Markus Probst X-Developer-Signature: v=1; a=openpgp-sha256; l=4721; i=markus.probst@posteo.de; h=from:subject:message-id; bh=QWIn30TMvT1lmgc9+8mNgqULSX/wvgFHQj1GFajrCx4=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBqV/TaGISuazZ3R7ZPF7BvabaRkxUF7G4hzD98N 7MJ8BOdz7GJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCalf02hsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9LxCA/7BQm05hIs9AUl9tTsAVJMRiH+GwJ10Yl /SlsR3HGuo3GKCRkhbjOPX/YtbJwAYZ836aISmxhmyZ+Kw04J4gpSK4ubD1ypR/f9HOjdkjKmZe qoDNQWR/ruPC0U2xy1/nugoTAG/piJwwpTJdrBX0IUrhETu8S/k4uuV7DZegPC6BY+2zifpFg/4 92cXPZ5Rm7+8r2ZomYNLztna6UJ3TOCOn4vYSeZJihUjhA/0tBgAKl/nUUYb36shOJvy0YxjaoR yWGyCzRufr7wWugJokkS1tt7VfzOUZwJ6xnBQpNjQYuAHqZXMdj8IhInPYA1H0ZGGY9/iT/cLZ/ Niwj4KBC7du3ZXoAT9yYfVlLVw3XQkxndg9yT/a8N0g0uJyUfzNcW9HWdkAV3qjXL8Pmv0/ZVVv f8IvGp4p75MZLqtbEUBDwZ+0u7BDG5K1K7j16pTF/gDPUKhDvi79r2/OyWfPeWiUZCIS7wrdqRH YSNMZ3F5lRYxnNxPKREjiKXDATnWUvvdPS0+28BJhvPUFLABXIPZZWPuN8UFI3I04Q6YvzvFrkW ElEgH6lFhQxnPXsAjBgdALRp2L6euibXyNVcdKIdg0HK6T4jFqFEZTijmCUh3SJ4+ORDqo/ZCLO Y5AZpam4A/hG+IWhwSnV5jG2Swdxo7QHsUHXrqCjm8PiE+DERdqU= 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 Add a sample Rust serial device bus device driver illustrating the usage of the serial device bus abstractions. This drivers probes through either a match of device / driver name or a match within the OF ID table. Signed-off-by: Markus Probst --- MAINTAINERS | 1 + samples/rust/Kconfig | 11 +++++ samples/rust/Makefile | 1 + samples/rust/rust_driver_serdev.rs | 90 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 103 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index cd735d227892..7d32aa7f42a4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -24570,6 +24570,7 @@ F: drivers/tty/serdev/ F: include/linux/serdev.h F: rust/helpers/serdev.c F: rust/kernel/serdev.rs +F: samples/rust/rust_driver_serdev.rs SERIAL IR RECEIVER M: Sean Young diff --git a/samples/rust/Kconfig b/samples/rust/Kconfig index c49ab9106345..31d62533ef25 100644 --- a/samples/rust/Kconfig +++ b/samples/rust/Kconfig @@ -161,6 +161,17 @@ config SAMPLE_RUST_DRIVER_AUXILIARY If unsure, say N. +config SAMPLE_RUST_DRIVER_SERDEV + tristate "Serial Device Bus Device Driver" + select RUST_SERIAL_DEV_BUS_ABSTRACTIONS + help + This option builds the Rust serial device bus driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_serdev. + + If unsure, say N. + config SAMPLE_RUST_SOC tristate "SoC Driver" select SOC_BUS diff --git a/samples/rust/Makefile b/samples/rust/Makefile index 6c0aaa58cccc..b986b681cde5 100644 --- a/samples/rust/Makefile +++ b/samples/rust/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_SAMPLE_RUST_DRIVER_PLATFORM) += rust_driver_platform.o obj-$(CONFIG_SAMPLE_RUST_DRIVER_USB) += rust_driver_usb.o obj-$(CONFIG_SAMPLE_RUST_DRIVER_FAUX) += rust_driver_faux.o obj-$(CONFIG_SAMPLE_RUST_DRIVER_AUXILIARY) += rust_driver_auxiliary.o +obj-$(CONFIG_SAMPLE_RUST_DRIVER_SERDEV) += rust_driver_serdev.o obj-$(CONFIG_SAMPLE_RUST_CONFIGFS) += rust_configfs.o obj-$(CONFIG_SAMPLE_RUST_SOC) += rust_soc.o diff --git a/samples/rust/rust_driver_serdev.rs b/samples/rust/rust_driver_serdev.rs new file mode 100644 index 000000000000..a12b1412db30 --- /dev/null +++ b/samples/rust/rust_driver_serdev.rs @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! Rust Serial device bus device driver sample. + +use kernel::{ + acpi, + device::{ + Bound, + Core, // + }, + of, + prelude::*, + serdev, + sync::aref::ARef, // +}; + +struct SampleDriver { + sdev: ARef, +} + +kernel::of_device_table!( + OF_TABLE, + MODULE_OF_TABLE, + ::IdInfo, + [(of::DeviceId::new(c"test,rust_driver_serdev"), ())] +); + +kernel::acpi_device_table!( + ACPI_TABLE, + MODULE_ACPI_TABLE, + ::IdInfo, + [(acpi::DeviceId::new(c"LNUXBEEF"), ())] +); + +#[vtable] +impl serdev::Driver for SampleDriver { + type IdInfo = (); + type Data<'bound> = Self; + const OF_ID_TABLE: Option> = Some(&OF_TABLE); + const ACPI_ID_TABLE: Option> = Some(&ACPI_TABLE); + + fn probe<'bound>( + sdev: &'bound serdev::Device>, + _info: Option<&'bound Self::IdInfo>, + ) -> impl PinInit + 'bound { + let dev = sdev.as_ref(); + + dev_dbg!(dev, "Probe Rust Serial device bus device driver sample.\n"); + + if sdev + .set_baudrate( + dev.fwnode() + .and_then(|fwnode| fwnode.property_read(c"baudrate").optional()) + .unwrap_or(115200), + ) + .is_err() + { + return Err(EINVAL); + } + sdev.set_flow_control(false); + sdev.set_parity(serdev::Parity::None)?; + + Ok(Self { sdev: sdev.into() }) + } + + fn receive<'bound>( + sdev: &'bound serdev::Device, + _this: Pin<&Self>, + data: &[u8], + ) -> usize { + sdev.write(data).unwrap_or_default() as usize + } +} + +impl Drop for SampleDriver { + fn drop(&mut self) { + dev_dbg!( + self.sdev.as_ref(), + "Remove Rust Serial device bus device driver sample.\n" + ); + } +} + +kernel::module_serdev_device_driver! { + type: SampleDriver, + name: "rust_driver_serdev", + authors: ["Markus Probst"], + description: "Rust Serial device bus device driver", + license: "GPL v2", +} -- 2.54.0