From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8113A426D3F; Wed, 29 Apr 2026 18:22:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777486922; cv=none; b=TH530I4bNFZyXD96tJWmZJ0OMc7C556XApR4PfmpSnCP88qkFNkQ+QU09y/+hfJYwXnO4oDTkTO1qnQ0F/yUMKUW9c4JFqWTuc0kx+DzzSUUc1mJxm+dPt0fiPVXK0plI0Kyag4LaoZVHfFlb5w+v+aU34tUPCHYLfHmwNoBdCg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777486922; c=relaxed/simple; bh=c1G8sdJh0CL1LI9CYozv7OslA1FCeWLsoDwfTfXFxao=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gcrrqIK+CpYpn+XCk0yIwq75MaBOjelU3l0RhkzxFWqgoVJHPi9JvK/lkjJDrWKMQLgoDLYNct/fcO9Ydh8r9b7K8b4d0tjZ1pvESKCCOJt7iPCv/SJEIXNnAULEIP2FfFFLHHamAwD1xtAfq1oMP6KXk8ah9BtezsLOZa+DXMc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Vq9Z1GOB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Vq9Z1GOB" Received: by smtp.kernel.org (Postfix) with ESMTPS id 330CBC2BCC6; Wed, 29 Apr 2026 18:22:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777486922; bh=c1G8sdJh0CL1LI9CYozv7OslA1FCeWLsoDwfTfXFxao=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=Vq9Z1GOBRZiVfE8VGiiv1rrniHaRH6YXw0STgf0F7kdMxFIOnZKwVhQrp/VP3LdlK SDfGlCcxbylzGVxzW2VaXhtup/mDI1o84MLAnik/xEHY6gmgC3OMyavJiBdEoRiNWo 5lAmTdnStrqMiUWVT/luEkuyH+po5TPnCgjiNRtO0GjdUpCUIrAzyKWPMzNVqvqLqK de9dEWwb4lWZ3vbh/wRnhDCkRjIVEI9WPyaALjplCJRupBSPqMUHji69OQ4d4FmSRG qCgIM97JS9DAoM/szvcVQfZTjuZ8CoKJvx+C0CGIw3RhS6El1F/mwrb285oXckdnL2 oQO0Og4FqeHvQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18CB4CD13DA; Wed, 29 Apr 2026 18:22:02 +0000 (UTC) From: Markus Probst via B4 Relay Date: Wed, 29 Apr 2026 20:21:34 +0200 Subject: [PATCH v7 4/4] samples: rust: add Rust serial device bus sample device driver Precedence: bulk X-Mailing-List: linux-pm@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: <20260429-rust_serdev-v7-4-0d89c791b5c8@posteo.de> References: <20260429-rust_serdev-v7-0-0d89c791b5c8@posteo.de> In-Reply-To: <20260429-rust_serdev-v7-0-0d89c791b5c8@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-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4264; i=markus.probst@posteo.de; h=from:subject:message-id; bh=ou+gfdCBhxJ76kbzVf5IO+8JF7WjVK31ujX01kwK5wI=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBp8kxHkRff2LTNQNrlQO0C+eM5ZARNc0YvxmC3C /WpacjS6BaJAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCafJMRxsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQNHYf+OetQ9KC5A//T2TNQEKCMsoAwbNcLxxRapj3uV7GPbO 8BEqs/fzM9BqbwUJwARU0Us8W9CdsSS6oz33F9i3p0c1j2rGk0tgZl4vFIm1km0uHkB0N3nmotf bO6dfN3G2BTM2VNHWkbaTuwgODb+d3j0kdV0yApfGJGKfD3p9YPwAVbesu6tFjoovu0tGYs81LW gGrFkpTwdZU2L4lAMTY7sO5T6KpO0jsA1R1HHSrjcUU+s9DjQH5GNmLMtS+TM8B4qMYe6UlqZpI h2BgEsvIMbsEHOihCPqATpDdzit3OP4Yoboo6McEgiwli0iLFmSwJS/58BYQsDVTD4Bi7BUATzc Ws8hOu4EmcnJsfUiHxnLTbL9pa2xMZRo6QfF+T57+/mOAdELmA+VVxqwWvEW8sXwkloA6YMSa5+ An5f5onlM7fBaL+qb847q6DGE6ehmBHozJQOQMRPg9xD/1pLrcBPrgZQmsMZAQSBbAg2LkiChsI rPmDLEDlbvI32XiRZ7f9SBUDhsHwyUMTXNReZNsqT0g3H7QN4tDc5Blk1dk/TFtkjnY5urgkGo/ bMus5gDlqM/O6F+a+Ej+qxD9fo7CcIaX5oMjidAUEub7NM4CVcgiWnySYuZAi1/YYSXtZZoInKp y7CXvweyox2RUSwjJP8V9mrCQ7x9F5XMxRR7iOZdhk1TgeC+gSKo= X-Developer-Key: i=markus.probst@posteo.de; a=openpgp; fpr=827418C4F4AC58E77230C47334761FF8E7AD43D2 X-Endpoint-Received: by B4 Relay for markus.probst@posteo.de/default with auth_id=680 X-Original-From: Markus Probst Reply-To: markus.probst@posteo.de From: Markus Probst 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..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..956ca62831fe --- /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<'a> serdev::Driver<'a> for SampleDriver { + type IdInfo = (); + const OF_ID_TABLE: Option> = Some(&OF_TABLE); + const ACPI_ID_TABLE: Option> = Some(&ACPI_TABLE); + + fn probe( + sdev: &'a serdev::Device, + _info: Option<&'a Self::IdInfo>, + ) -> impl PinInit + 'a { + 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", +} -- 2.53.0