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 1DCAFD58B17 for ; Sun, 15 Mar 2026 11:21:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D99FC10E54A; Sun, 15 Mar 2026 11:21:09 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; secure) header.d=posteo.de header.i=@posteo.de header.b="oPres7mu"; dkim-atps=neutral Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by gabe.freedesktop.org (Postfix) with ESMTPS id D0AD810E373 for ; Fri, 13 Mar 2026 18:12:30 +0000 (UTC) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id A6C57240101 for ; Fri, 13 Mar 2026 19:12:28 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1773425548; bh=oP1CwqkAzPip8KPnsHIuwNOs+ExBzvZniOq/Ft8GfNI=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type: Content-Transfer-Encoding:To:Cc:Autocrypt:OpenPGP:From; b=oPres7muxfKgHkLoJKVK63A39hZGGygi5uuWSFBvf5SxSn3MPn8DLzcF0hfwxZvoZ oq0WlI2jpTJ8N9qFvNzM+7Tgx6QVlFcEURamIkGIhCcwiaO+6nPuPN2f85b2YeNgnO 2KZ+m7muoxLXK6Fb3jpxIK4iQjV8bLuzXwUnOwFGt07Erdtpc8FLiYXq8aj3EyzgG9 ZPqOz4XIUeW2T9EqZl9ls23g3Zz+IjpUQT7b7X4CSZnmNW3Wawe+WqfVphkHrslEhq 0ClK0OyrCswmxYDtxVK8TcJZzCTczV8aBB0ygEXi2pncrcslxTyzmbdqKKiZiTpTqX c88F5T0crqg4g== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4fXXdN4yr5z6txb; Fri, 13 Mar 2026 19:12:24 +0100 (CET) From: Markus Probst Subject: [PATCH v3 0/4] rust: add basic serial device bus abstractions Date: Fri, 13 Mar 2026 18:12:27 +0000 Message-Id: <20260313-rust_serdev-v3-0-c9a3af214f7f@posteo.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAG9TtGkC/1XMSw6CMBSF4a2QO7amvX0BI/dhjBG4SieUtNhoC Hu3EE1keE7y/TNECo4i1MUMgZKLzg95yEMBbX8bHsRclzcgRy1QWBaecbpm1FFiRFqVgipe6ha yGAPd3WurnS959y5OPry3eBLr++0g33WSYJyRUkZpa6xBcRp9nMgfO4K1k/BnDZfc7C2utmpQN gob1PrfLsvyAVQlkmfiAAAA X-Change-ID: 20251217-rust_serdev-ee5481e9085c 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-Mailman-Approved-At: Sun, 15 Mar 2026 11:20:58 +0000 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" This patch series adds the serdev device bus rust abstraction into the kernel. This abstraction will be used by a driver, which targets the MCU devices in Synology devices. Kari Argillander also messaged me, stating that he wants to write a watchdog driver with this abstraction (needing initial device data). @Rob: Are you willing to maintain these rust abstractions yourself, as you are the expert on this subsystem, otherwise I would take care of it with a "SERIAL DEVICE BUS [RUST]" section in the MAINTAINERS file. In the second case, I assume you are going to pick those patches as-is into your tree, after they have been reviewed? Signed-off-by: Markus Probst --- Changes in v3: - fix vertical import style - add Kconfig entry for the rust abstraction - fix documentation in include/linux/serdev.h - rename private_data to rust_private_data - fix `complete_all` <-> `wait_for_completion` typo - move drvdata_borrow call after the completion - Link to v2: https://lore.kernel.org/r/20260306-rust_serdev-v2-0-e9b23b42b255@posteo.de Changes in v2: - fix documentation in `serdev::Driver::write` and `serdev::Driver::write_all` - remove use of `dev_info` in probe from the sample - remove `properties_parse` from the sample - add optional `baudrate` property to the sample - remove 1. patch - remove `TryFrom<&device::Device> for &serdev::Device` implementation - fix import style - add patch to return reference in `devres::register` to fix safety issue - add patch to add private data to serdev_device, to fix `Device.drvdata()` from failing - simplify abstraction by removing ability to receive the initial transmission. It may be added later in a separate patch series if needed. - Link to v1: https://lore.kernel.org/r/20251220-rust_serdev-v1-0-e44645767621@posteo.de --- Markus Probst (4): rust: devres: return reference in `devres::register` serdev: add rust private data to serdev_device rust: add basic serial device bus abstractions samples: rust: add Rust serial device bus sample device driver drivers/tty/serdev/Kconfig | 7 + include/linux/serdev.h | 15 +- rust/bindings/bindings_helper.h | 1 + rust/helpers/helpers.c | 1 + rust/helpers/serdev.c | 22 ++ rust/kernel/cpufreq.rs | 3 +- rust/kernel/devres.rs | 15 +- rust/kernel/drm/driver.rs | 3 +- rust/kernel/lib.rs | 2 + rust/kernel/serdev.rs | 536 +++++++++++++++++++++++++++++++++++++ samples/rust/Kconfig | 11 + samples/rust/Makefile | 1 + samples/rust/rust_driver_serdev.rs | 86 ++++++ 13 files changed, 693 insertions(+), 10 deletions(-) --- base-commit: 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681 change-id: 20251217-rust_serdev-ee5481e9085c