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 B3BC43EB7E7 for ; Fri, 6 Mar 2026 19:35:40 +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=1772825742; cv=none; b=cMVgAeFS9gnDhqmHMAxW6eIBjWbadgnJbftV9MuWJiTmk6Wof1imZSawwGWipgHs6IxsmoRf8dNrYTtXoYwaoYmrPIZArhOAzB31r6doEdBBCeYiTkNnXAKke83akRqkcg1WkZGIiQIpI8TlOcFcffnDUW5bzkhVmk7E0SNMkig= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772825742; c=relaxed/simple; bh=35U7frsCMzSPd4Y0Xg13l2r+WwfzxpmhICOIhuy4C4A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=S2oo7rQ+qY1mWIjcNUHnI9uEc0gMhGhCffdC1XvoOU4XbmuqonN/R8VO1UTD6VH4Rn6YYZVpQG8Uq2hTolge+C1vDdC36UaRNCRybTzleskSoptzf76Vph9eOAE/c3I+whThEvBms2Ys4cqyxhGlafPrGb5K5ejjLyFN1JfiFDY= 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=b1aBtRjP; 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="b1aBtRjP" Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id EBFBA24002D for ; Fri, 6 Mar 2026 20:35:35 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1772825735; bh=txAK4TUgih2D/E3Nqfs0Z2H7fnxxBtNclmi2vXilof0=; h=From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:To:Cc:Autocrypt:OpenPGP:From; b=b1aBtRjPXCrtJV6Quprz21c3y7/A/p5L9r8/ZwMhQRYdKKqSeoXCIHHvhhX0IyVrF S/PFSuS3bM00wnZxGrm6t11XycNvzFRCbXJvyr5jZNP60sJEuFGt2P5UEEI5ajfPgA 6WxiICrlLFyrAcF9HE6UGORenqBNWRvULXaZdUzBN8ac7NJNOyVZX/lpzE9bTIuHri z/0oky6rrDUIg3xm6Xhe0IUpAGTGU9TzEGI/WqRxEIRda/VCUo2htBVBWWzHaUE4bq ay2FEl6Umrxpbazlo+ON/8iwl7SuDt2RfUMZHErOxpDq/JrNHZiLqmsm4oBibs2wVV mHZiorXC6eWyw== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4fSGpX6lrTz9rxB; Fri, 6 Mar 2026 20:35:32 +0100 (CET) From: Markus Probst Date: Fri, 06 Mar 2026 19:35:35 +0000 Subject: [PATCH v2 4/4] samples: rust: add Rust serial device bus sample device driver Precedence: bulk X-Mailing-List: linux-serial@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: <20260306-rust_serdev-v2-4-e9b23b42b255@posteo.de> References: <20260306-rust_serdev-v2-0-e9b23b42b255@posteo.de> In-Reply-To: <20260306-rust_serdev-v2-0-e9b23b42b255@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 , 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=4223; i=markus.probst@posteo.de; h=from:subject:message-id; bh=35U7frsCMzSPd4Y0Xg13l2r+WwfzxpmhICOIhuy4C4A=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBpqyx5DxFPflzKAMEW2DR5vTFN53wdyqq9r1Qg1 mHyKvG1+QKJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaasseRsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMSwyLDIACgkQNHYf+OetQ9IJrBAAqsmVlhqf+W8Q1Fuju3nJ7qmoBNiRkh0 LUWTJnfuzxGofuVWofRYeC/O+bGbhKcS8Z7j8OXnM7FrZAyfyjH89gAjyN8nxO31VpcRJvTKP9U cRQOsd89W7zSbGg+T4cMc6951RjUYlcI31G39/pMv2P71LiI0VbeTlnqXUVpd39Jn1g2WVIi9qX QSvr79wkKQXMeEfqmyorQyaVL232CtNOi48DqW5mR085X0t8HimszseGuVnImk024k+KULoLZRl 5rt1MT7mTBdhWFwXdSWwKwnxAjk4tUFeJ/EQTP2j/z/T8S0EomAABL2PU2fWpFkyrAA+abGrXf3 ZU+zmkSB3AYYkI80v3vgmsd/cweKYzxBFnUQ6MTgW593z9U8dk5TW+t842le8Sz3k0Q/yDs4Mu1 er0UDGTNgKsjvDFeiq7VbJ2phvzBS7UjoNTBfapXUIyvNFeAeKem+ddtEjm6v9tPDOLu7sIgwis F+tjksNqLpHUm1phlK6hlDSw9EVzH3Tlcdbd644X2oUrk+tY61O9rXKiywVy3Iqp1nrCPNhvs9n aEdtQQnYK2aT+YUVbzK3GmTL8TQ0Ocz5joZ+ENLHtzJnvsS8T75nwLYQMaQLSPmjBfQsCu+zxm0 84jYjVAy/AkVdQ5ZkiCYi2j8szijo6Q9NQKCbL5ivMC5dpR3SQ4A= 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 --- samples/rust/Kconfig | 11 +++++ samples/rust/Makefile | 1 + samples/rust/rust_driver_serdev.rs | 86 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 98 insertions(+) diff --git a/samples/rust/Kconfig b/samples/rust/Kconfig index c49ab9106345..a421470d2c52 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" + depends on SERIAL_DEV_BUS + 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..8cf3fb451b22 --- /dev/null +++ b/samples/rust/rust_driver_serdev.rs @@ -0,0 +1,86 @@ +// 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 = (); + const OF_ID_TABLE: Option> = Some(&OF_TABLE); + const ACPI_ID_TABLE: Option> = Some(&ACPI_TABLE); + + fn probe( + sdev: &serdev::Device, + _info: Option<&Self::IdInfo>, + ) -> impl PinInit { + 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(sdev: &serdev::Device, _this: Pin<&Self>, data: &[u8]) -> usize { + let _ = sdev.write_all(data, serdev::Timeout::Max); + data.len() + } +} + +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", +} -- 2.52.0