From patchwork Tue Oct 22 21:31:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danilo Krummrich X-Patchwork-Id: 13846184 X-Patchwork-Delegate: bhelgaas@google.com 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 274611E8825; Tue, 22 Oct 2024 21:34:01 +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=1729632841; cv=none; b=Q7/zJk66p/fSPwVDKhkrdh79De549eyl7W32b6mcM4BWyJrGJ6X75MEeb5FTu1U8/wjie+9h6w4W3t5JunEw3lb8Wiw44s2WlQVYSTNCl6yE88N/sHVzcjZLf5Dhin34NHfoXGwmT43n/+Q/Su2FVrHfy8eC/gSouMqouNou+A8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729632841; c=relaxed/simple; bh=Z6xEblxHrjFI+8uux18RRvZlXbj60UUK+yfXOOiMVQA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pjoCli3P5NFF/tD0WMkRP7C8pPcex3GrUlj9Kr4xpsbIQrLVgUZ29GhwzBLIx/gHf/fO9WUwJO18RCSAYpeqfN9rFzjHBao0c7vzT9seiivBO4iE03ZrmNia7rNX80kgq6HKWO8Dxsaq5rWrNpOJh/ZikjX0FpybVfOkxOLJKJc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gpaIAuxQ; 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="gpaIAuxQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3C14C4CEC7; Tue, 22 Oct 2024 21:33:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729632841; bh=Z6xEblxHrjFI+8uux18RRvZlXbj60UUK+yfXOOiMVQA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gpaIAuxQ7IdPOSXxPbqHTL5sFE/BHMRpR/0dprfssGCmrg1mxjRSxo6zvSL08LYE9 w7A4lJpoX2VF0dDE7TjEtg6txPXHQYjSkPUbghsDh+d3MSv/NNkgPjlDOM69CqLXo0 2NMqa7otl3U7N2PrarXUx4AH7RTyNdpWT8t41VEi164cb1pSFVmpjbMIuDVZJCLvZ8 3oZzYfl0kR4Pxwr/MLMBdcA8DWH8gc/ffNziOAX2xLMzCqhBKDPQWezuWExAyQDdBK 4SMMYZ6tSHbwoUy5DRqG+P7rvSCdVAS5itYom0/JKOOEpqnBpfKu84Ga9yNwM1CMqd 5YAA59SLqapzg== 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 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 v3 16/16] samples: rust: add Rust platform sample driver Date: Tue, 22 Oct 2024 23:31:53 +0200 Message-ID: <20241022213221.2383-17-dakr@kernel.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241022213221.2383-1-dakr@kernel.org> References: <20241022213221.2383-1-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 Signed-off-by: Rob Herring (Arm) --- MAINTAINERS | 1 + samples/rust/Kconfig | 10 +++++ samples/rust/Makefile | 1 + samples/rust/rust_driver_platform.rs | 62 ++++++++++++++++++++++++++++ 4 files changed, 74 insertions(+) create mode 100644 samples/rust/rust_driver_platform.rs diff --git a/MAINTAINERS b/MAINTAINERS index 173540375863..583b6588fd1e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6986,6 +6986,7 @@ 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/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 b66767f4a62a..11fcb312ed36 100644 --- a/samples/rust/Makefile +++ b/samples/rust/Makefile @@ -3,5 +3,6 @@ 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 subdir-$(CONFIG_SAMPLE_RUST_HOSTPROGS) += hostprogs diff --git a/samples/rust/rust_driver_platform.rs b/samples/rust/rust_driver_platform.rs new file mode 100644 index 000000000000..55caaaa4f216 --- /dev/null +++ b/samples/rust/rust_driver_platform.rs @@ -0,0 +1,62 @@ +// 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!("redhat,rust-sample-platform-driver")), + Info(42) + )] +); + +impl platform::Driver for SampleDriver { + type IdInfo = Info; + const ID_TABLE: platform::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"); + + match (Self::of_match_device(pdev), info) { + (Some(id), Some(info)) => { + dev_info!( + pdev.as_ref(), + "Probed by OF compatible match: '{}' with info: '{}'.\n", + id.compatible(), + info.0 + ); + } + _ => { + dev_info!(pdev.as_ref(), "Probed by name.\n"); + } + }; + + 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", +}