From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F222FC43458 for ; Sun, 12 Jul 2026 16:58:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1861D10E2DB; Sun, 12 Jul 2026 16:58:42 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; secure) header.d=posteo.de header.i=@posteo.de header.b="I1Co2YBc"; dkim-atps=neutral Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by gabe.freedesktop.org (Postfix) with ESMTPS id A758010E263 for ; Sun, 12 Jul 2026 16:58:40 +0000 (UTC) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id F3593240103 for ; Sun, 12 Jul 2026 18:58:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=1984.8680eb; t=1783875518; bh=RQ552J6AxBWAYVe8umfL7ZMuLqs5AWVzKrIxu2FHMdE=; h=From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:To:Cc:Autocrypt:OpenPGP:From; b=I1Co2YBcF42TJcKUId8/zdyCThb7JUcUxg97MtvuuwUOHV7PsdvOQAxLDxgvTFyvL wUfJgMc1xE0rUmII7hSb/39hAeEOmFkkiVSF2adzyQgOKotSZGOho8Tqva4yWFIoRT k588qIDzW3gvaVYoCEjwqOZomX6ouw0opRNmuSX2Kviv3LZEl21Y8IRb7BfcFhmAUp qtz5TqwJFJLX77/dg1F4XSKubdgwh1reZE1vwXEMQwPe/QNoIlMc80g4ABXPTH/lNJ zp+1SCQZjvvY2Is81YdOeoGFLJbz2c1WXhpSQlYEuPXkREs0cGs6Hswl5RCRT75v2J Bx3X2/TtvivAw== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4gysGM4NNlz6tsg; Sun, 12 Jul 2026 18:58:35 +0200 (CEST) From: Markus Probst Date: Sun, 12 Jul 2026 16:58:37 +0000 Subject: [PATCH v13 2/3] samples: rust: add Rust serial device bus sample device driver MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260712-rust_serdev-v13-2-2c4060bc8e30@posteo.de> References: <20260712-rust_serdev-v13-0-2c4060bc8e30@posteo.de> In-Reply-To: <20260712-rust_serdev-v13-0-2c4060bc8e30@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. 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preference=encrypt X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 | 91 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 104 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 00d977ce7028..ed4f8f2f17d5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -24569,6 +24569,7 @@ 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..824affbf6593 --- /dev/null +++ b/samples/rust/rust_driver_serdev.rs @@ -0,0 +1,91 @@ +// 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 { + 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", +} -- 2.54.0