From patchwork Thu Dec 12 16:33:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danilo Krummrich X-Patchwork-Id: 13905626 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 1013E23D436; Thu, 12 Dec 2024 16:36:41 +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=1734021401; cv=none; b=LG3jA3fhMN3stWPW7nUpxHZVlFtH5n8RNfz9jehWoPekJ8egmRSFaEI1iZs+4/GeCCPZ/eeQzVZrUxlTMzQMkSJbCFFaiAeNN7UYwprBVjB3/UzU3Zdyn9LwGODv4HMkbJbiIfmmybBSpmm83QI8pD70lZpaYXrocNRrAEYP4fw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734021401; c=relaxed/simple; bh=iV4ETgKwWERJrqWWD5qgGkhh/5zunfh21vhlzhklPVY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Gwn/TwsdvV6S8wFMs0ZAYzMtH0RGxGIC535PW8Ly1wfEtWPkgZaBwD4WvlfZGGn1TnH+X1ckXGbJKLYxC+O/G0gDTakVMbWfvSC9xvgdq+mCeDjVdINoMPC/sD+WatzZOXDI9o+GvJVHFkOlY2SZacJTZQCjRocVC7SLIhdiv8Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YqmKkrGA; 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="YqmKkrGA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B645C4CEDD; Thu, 12 Dec 2024 16:36:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734021400; bh=iV4ETgKwWERJrqWWD5qgGkhh/5zunfh21vhlzhklPVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YqmKkrGAlr03SJXKpZ8/T5gnblh+NnwpCN8it/K3N1vnBdp8cqupmF+Cc2cPjyd0x 2NgifX89F4T29tcVD6xjnixB00Hv5zltSlYjALBCu//WkKhVzjNXYbjLnK8AAYHrpB 4xMr8eNDjJORysKLdr83HVbwn8X3p/fbe1SG7NuAseZvVuI5wiO1FdNh0Ci3Mq2xY+ lgbccypwa+6BGR9puKEvn2KEEEb56C3XVktej8yN7//nKKHFweCwtigAbcCJToukYb Vuibnlj9kN7HkQ0EB2IeqTNVYn8uhvzcAzfrFCGwd44HTFODoPPQwW+JPyf9nfzUIi TXW9EsDlOJa6w== 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, paulmck@kernel.org Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, rcu@vger.kernel.org, Danilo Krummrich Subject: [PATCH v6 15/16] samples: rust: add Rust platform sample driver Date: Thu, 12 Dec 2024 17:33:46 +0100 Message-ID: <20241212163357.35934-16-dakr@kernel.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241212163357.35934-1-dakr@kernel.org> References: <20241212163357.35934-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: rcu@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. Reviewed-by: Rob Herring (Arm) Signed-off-by: Danilo Krummrich --- 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 fec876068c40..95bd7dc88ad8 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..8120609e2940 --- /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: Option> = Some(&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", +}