From patchwork Tue Dec 10 22:46:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danilo Krummrich X-Patchwork-Id: 13902408 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 A1B83225A3E; Tue, 10 Dec 2024 22:51:34 +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=1733871094; cv=none; b=fzkiVYNdXWSe1RJoY7gI96mD7dy6rAWzCa480F9satrBtSo2D6ElLmlr6I4544KRXovgDnDJ7a4jjj5vaYuLGyHirpLz2bD+Vvy06xk7uXbuIolXT1UW44+lbAr6FsabN1wflduSsfu5xEQHiIZwozlfG5yINx484ncLdwtC9Ok= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733871094; c=relaxed/simple; bh=0RjRP3npAXMurmOnYf92XqAAkD11QEaIC9uLAqqRCPk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=foeGih8SIiQroO4Pb3N9vLzfjp/49R5Ni0NZTUbWQB5fh5rybF371KsGHgSa9CoC6UG16+MF5BDPgjFyJJOme/IMFEI5IQ5G4ZKtoZGUdtN2hALdhTmxpUeEr4cr44T0nb48N/d1Nn+kAVW+WjXiuwU5WzB8qu5Q50Bra2Z4dxw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RB/24OQX; 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="RB/24OQX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 543E1C4CEDE; Tue, 10 Dec 2024 22:51:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733871094; bh=0RjRP3npAXMurmOnYf92XqAAkD11QEaIC9uLAqqRCPk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RB/24OQX+dZSeHKPOC8Xx2mwR8sxVkdlJURGS107P+9haVF53A9NOzoxU5NLlpDLE Das2LBHWZm9uSuvjA3gkBtbygh27cW+YadXatAYAbFzf9NRDbFwa2hE8PAHY+T2viH J0GJkP+g1fr42kGJiWBXQXB3o7mLH5uCrVmlnc4stxVoQwEalYulT68acOzMaV0KV9 OobvLQud3kff9qd0SUOABr7LY8EgPKcExVHj5JrSGgQUyAUbjnPT5rXiQmx78qOBZp OHWadFIEUj3nt9FrYc8GzH8uQW1cAYatOwM3ipR9Ju8GashFIaNV2lcKlVIfnhHEjE EH3wdYSLjRtSA== From: Danilo Krummrich To: gregkh@linuxfoundation.org, rafael@kernel.org, bhelgaas@google.com, ojeda@kernel.org, alex.gaynor@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, benno.lossin@proton.me, tmgross@umich.edu, a.hindborg@samsung.com, aliceryhl@google.com, airlied@gmail.com, fujita.tomonori@gmail.com, lina@asahilina.net, pstanner@redhat.com, ajanulgu@redhat.com, lyude@redhat.com, robh@kernel.org, daniel.almeida@collabora.com, saravanak@google.com, dirk.behme@de.bosch.com, j@jannau.net, fabien.parent@linaro.org, chrisi.schrefl@gmail.com Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, Danilo Krummrich Subject: [PATCH v5 15/16] samples: rust: add Rust platform sample driver Date: Tue, 10 Dec 2024 23:46:42 +0100 Message-ID: <20241210224947.23804-16-dakr@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241210224947.23804-1-dakr@kernel.org> References: <20241210224947.23804-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a sample Rust platform driver illustrating the usage of the platform bus abstractions. This driver probes through either a match of device / driver name or a match within the OF ID table. Signed-off-by: Danilo Krummrich Reviewed-by: Rob Herring (Arm) --- MAINTAINERS | 1 + drivers/of/unittest-data/tests-platform.dtsi | 5 ++ samples/rust/Kconfig | 10 ++++ samples/rust/Makefile | 1 + samples/rust/rust_driver_platform.rs | 49 ++++++++++++++++++++ 5 files changed, 66 insertions(+) create mode 100644 samples/rust/rust_driver_platform.rs diff --git a/MAINTAINERS b/MAINTAINERS index a4253abb114b..47b1a82dfdd0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7037,6 +7037,7 @@ F: rust/kernel/device_id.rs F: rust/kernel/devres.rs F: rust/kernel/driver.rs F: rust/kernel/platform.rs +F: samples/rust/rust_driver_platform.rs DRIVERS FOR OMAP ADAPTIVE VOLTAGE SCALING (AVS) M: Nishanth Menon diff --git a/drivers/of/unittest-data/tests-platform.dtsi b/drivers/of/unittest-data/tests-platform.dtsi index fa39611071b3..2caaf1c10ee6 100644 --- a/drivers/of/unittest-data/tests-platform.dtsi +++ b/drivers/of/unittest-data/tests-platform.dtsi @@ -33,6 +33,11 @@ dev@100 { reg = <0x100>; }; }; + + test-device@2 { + compatible = "test,rust-device"; + reg = <0x2>; + }; }; }; }; diff --git a/samples/rust/Kconfig b/samples/rust/Kconfig index 6d468193cdd8..70126b750426 100644 --- a/samples/rust/Kconfig +++ b/samples/rust/Kconfig @@ -41,6 +41,16 @@ config SAMPLE_RUST_DRIVER_PCI If unsure, say N. +config SAMPLE_RUST_DRIVER_PLATFORM + tristate "Platform Driver" + help + This option builds the Rust Platform driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_platform. + + If unsure, say N. + config SAMPLE_RUST_HOSTPROGS bool "Host programs" help diff --git a/samples/rust/Makefile b/samples/rust/Makefile index 2f5b6bdb2fa5..761d13fff018 100644 --- a/samples/rust/Makefile +++ b/samples/rust/Makefile @@ -4,6 +4,7 @@ ccflags-y += -I$(src) # needed for trace events obj-$(CONFIG_SAMPLE_RUST_MINIMAL) += rust_minimal.o obj-$(CONFIG_SAMPLE_RUST_PRINT) += rust_print.o obj-$(CONFIG_SAMPLE_RUST_DRIVER_PCI) += rust_driver_pci.o +obj-$(CONFIG_SAMPLE_RUST_DRIVER_PLATFORM) += rust_driver_platform.o rust_print-y := rust_print_main.o rust_print_events.o diff --git a/samples/rust/rust_driver_platform.rs b/samples/rust/rust_driver_platform.rs new file mode 100644 index 000000000000..6ad59aa26eca --- /dev/null +++ b/samples/rust/rust_driver_platform.rs @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! Rust Platform driver sample. + +use kernel::{c_str, of, platform, prelude::*}; + +struct SampleDriver { + pdev: platform::Device, +} + +struct Info(u32); + +kernel::of_device_table!( + OF_TABLE, + MODULE_OF_TABLE, + ::IdInfo, + [(of::DeviceId::new(c_str!("test,rust-device")), Info(42))] +); + +impl platform::Driver for SampleDriver { + type IdInfo = Info; + const OF_ID_TABLE: of::IdTable = &OF_TABLE; + + fn probe(pdev: &mut platform::Device, info: Option<&Self::IdInfo>) -> Result>> { + dev_dbg!(pdev.as_ref(), "Probe Rust Platform driver sample.\n"); + + if let Some(info) = info { + dev_info!(pdev.as_ref(), "Probed with info: '{}'.\n", info.0); + } + + let drvdata = KBox::new(Self { pdev: pdev.clone() }, GFP_KERNEL)?; + + Ok(drvdata.into()) + } +} + +impl Drop for SampleDriver { + fn drop(&mut self) { + dev_dbg!(self.pdev.as_ref(), "Remove Rust Platform driver sample.\n"); + } +} + +kernel::module_platform_driver! { + type: SampleDriver, + name: "rust_driver_platform", + author: "Danilo Krummrich", + description: "Rust Platform driver", + license: "GPL v2", +}