From patchwork Fri Dec 9 14:07:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 13069643 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C55E7C4167B for ; Fri, 9 Dec 2022 14:12:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229498AbiLIOMU (ORCPT ); Fri, 9 Dec 2022 09:12:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230110AbiLIOLe (ORCPT ); Fri, 9 Dec 2022 09:11:34 -0500 Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47135FD06 for ; Fri, 9 Dec 2022 06:07:50 -0800 (PST) Received: by mail-wm1-x32d.google.com with SMTP id k22-20020a05600c1c9600b003d1ee3a6289so3523304wms.2 for ; Fri, 09 Dec 2022 06:07:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=D9hs664qju1jr9botwPcx4yk7u/Ban5WI5fBxEeXJKY=; b=2gKaMzEdJu6183MaIfhqG4qOE/65iIziO/nRwAObuSx4Gm0EDfG4Ie9WcFu66ogkwY +9jvVIDsn/U1+Z4s80gq1895PXrcYg++MeBy6vC9z0/xX/t5BtjKozmbJR2snQc0BMSP aYvtX5rRKPPOvRHa/LDM9zf5P231MuPbav/pVwRhtt8eAtNkFkyN1fglU9VChnMcRY6c NOQoyrYQwSn3hChQDY3wV84H7RNKgz3GeSi0aX7sCIbc63ss1jeeJN12w+iRhs2QYdVS WKENBc2WW/UoDdZ1g36Y/R2vTPw/0VMGXJS0EKe4K2/vmZqx7v1fAdoCFnVPvQ96uUMJ 0WbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=D9hs664qju1jr9botwPcx4yk7u/Ban5WI5fBxEeXJKY=; b=t2yrJZLcuvzRihoMmJIJ/xg68RWN3oqyiXmTw/Qzb40ToNwoEJI9rqDqqptyiarPDa o1GKtkf3yn2IjobYlsoKucO7YbS9QdjliUPpZ1tFNrMWfnFS/ytpAMWNd+TzH0JdIXQB 3g0IBNlO26kQtHieGYk0KLFjM371E+Q+HzZuRQ4uUJyGZ/qt6Pxt3dhp4zs+2ETfqQZd ySflph+/ZcIrMeHtIyH8yZnjNTC2HQWg14lA7aboGVv8BWn69nxmSuzvnc1F5EII83W5 Z2yh60wyrjSviZUysh947l8J6anJVDutMtDEsLtzrx5rxsQG5AfbwZaA4GVIHFTmuZoF a0CA== X-Gm-Message-State: ANoB5pkrEOP3h3bb8BB7bO2+Ac7nHwZDEiMperV+xlCf0Q1lhQ1eHpvs YJgxpo/Y6K0qxupihe8xrZ/BlQ== X-Google-Smtp-Source: AA0mqf6+aVu/uc8c7VIta+ZcJNe3jBqQU1GY0l6/UKg7sU1blxWJBYrBieE9sgl3NVTdOIy13JgyWQ== X-Received: by 2002:a05:600c:5010:b0:3d0:71d1:7931 with SMTP id n16-20020a05600c501000b003d071d17931mr5385549wmr.8.1670594856387; Fri, 09 Dec 2022 06:07:36 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:51db:8fd7:45e0:fe69]) by smtp.gmail.com with ESMTPSA id q3-20020a1c4303000000b003cfa81e2eb4sm1869848wma.38.2022.12.09.06.07.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Dec 2022 06:07:36 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Greg Kroah-Hartman , Jiri Slaby , Srinivas Kandagatla , Vinod Koul , Alex Elder , =?utf-8?q?Ilp?= =?utf-8?q?o_J=C3=A4rvinen?= Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH 1/2] tty: serial: provide devm_uart_add_one_port() Date: Fri, 9 Dec 2022 15:07:30 +0100 Message-Id: <20221209140731.573503-2-brgl@bgdev.pl> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20221209140731.573503-1-brgl@bgdev.pl> References: <20221209140731.573503-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bartosz Golaszewski Provide a devres variant of uart_add_one_port() that removes the managed port at device detach. Signed-off-by: Bartosz Golaszewski --- .../driver-api/driver-model/devres.rst | 3 ++ drivers/tty/serial/serial_core.c | 48 +++++++++++++++++++ include/linux/serial_core.h | 6 +++ 3 files changed, 57 insertions(+) diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst index 56082265e8e5..5d07a8c1eadb 100644 --- a/Documentation/driver-api/driver-model/devres.rst +++ b/Documentation/driver-api/driver-model/devres.rst @@ -436,6 +436,9 @@ RTC SERDEV devm_serdev_device_open() +SERIAL + devm_uart_add_one_port() + SLAVE DMA ENGINE devm_acpi_dma_controller_register() diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 179ee199df34..44cdb8aa80a4 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3217,6 +3217,54 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport) } EXPORT_SYMBOL(uart_remove_one_port); +struct uart_port_devres { + struct uart_driver *drv; + struct uart_port *port; +}; + +static void devm_uart_remove_one_port(struct device *dev, void *data) +{ + struct uart_port_devres *res = data; + + uart_remove_one_port(res->drv, res->port); +} + +/** + * devm_uart_add_one_port - managed variant of uart_register_driver() + * @dev: managed device + * @drv: pointer to the uart low level driver structure for this port + * @uport: uart port structure to use for this port. + * + * Context: task context, might sleep + * + * This is a devres wrapper around uart_add_one_port(). It allows the driver + * @drv to register its own uart_port structure with the core driver. The port + * will be unregistered on driver detach. + */ +int devm_uart_add_one_port(struct device *dev, + struct uart_driver *drv, struct uart_port *port) +{ + struct uart_port_devres *res; + int ret; + + res = devres_alloc(devm_uart_remove_one_port, sizeof(*res), GFP_KERNEL); + if (!res) + return -1; + + ret = uart_add_one_port(drv, port); + if (ret) { + devres_free(res); + return -1; + } + + res->drv = drv; + res->port = port; + devres_add(dev, res); + + return 0; +} +EXPORT_SYMBOL(devm_uart_add_one_port); + /** * uart_match_port - are the two ports equivalent? * @port1: first port diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index d657f2a42a7b..d0911f04706e 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -771,6 +771,12 @@ int uart_remove_one_port(struct uart_driver *reg, struct uart_port *port); bool uart_match_port(const struct uart_port *port1, const struct uart_port *port2); +/* + * UART devres + */ +int devm_uart_add_one_port(struct device *dev, + struct uart_driver *drv, struct uart_port *port); + /* * Power Management */