From patchwork Tue Aug 3 19:29:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 491788 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F793C4320E for ; Tue, 3 Aug 2021 19:28:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6129E60EC0 for ; Tue, 3 Aug 2021 19:28:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239905AbhHCT3I (ORCPT ); Tue, 3 Aug 2021 15:29:08 -0400 Received: from mga17.intel.com ([192.55.52.151]:13482 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230376AbhHCT3I (ORCPT ); Tue, 3 Aug 2021 15:29:08 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10065"; a="194045227" X-IronPort-AV: E=Sophos;i="5.84,292,1620716400"; d="scan'208";a="194045227" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2021 12:28:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,292,1620716400"; d="scan'208";a="585103661" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 03 Aug 2021 12:28:53 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 32976169; Tue, 3 Aug 2021 22:29:22 +0300 (EEST) From: Andy Shevchenko To: Andy Shevchenko , Hans de Goede , Maximilian Luz , Lee Jones , Greg Kroah-Hartman , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-serial@vger.kernel.org Cc: Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , Mark Gross , Rob Herring , Jiri Slaby Subject: [PATCH v1 1/5] serdev: Split and export serdev_acpi_get_uart_resource() Date: Tue, 3 Aug 2021 22:29:01 +0300 Message-Id: <20210803192905.72246-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org The same as for I²C Serial Bus resource split and export serdev_acpi_get_uart_resource(). We have already 3 users one of which is converted here. Rationale of this is to consolidate parsing UART Serial Bus resource in one place as it's done, e.g., for I²C Serial Bus. Signed-off-by: Andy Shevchenko --- drivers/tty/serdev/core.c | 36 +++++++++++++++++++++++++++++------- include/linux/serdev.h | 14 ++++++++++++++ 2 files changed, 43 insertions(+), 7 deletions(-) diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 92498961fd92..436e3d1ba92c 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -562,23 +562,45 @@ struct acpi_serdev_lookup { int index; }; +/** + * serdev_acpi_get_uart_resource - Gets UARTSerialBus resource if type matches + * @ares: ACPI resource + * @uart: Pointer to UARTSerialBus resource will be returned here + * + * Checks if the given ACPI resource is of type UARTSerialBus. + * In this case, returns a pointer to it to the caller. + * + * Returns true if resource type is of UARTSerialBus, otherwise false. + */ +bool serdev_acpi_get_uart_resource(struct acpi_resource *ares, + struct acpi_resource_uart_serialbus **uart) +{ + struct acpi_resource_uart_serialbus *sb; + + if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) + return false; + + sb = &ares->data.uart_serial_bus; + if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_UART) + return false; + + *uart = sb; + return true; +} +EXPORT_SYMBOL_GPL(serdev_acpi_get_uart_resource); + static int acpi_serdev_parse_resource(struct acpi_resource *ares, void *data) { struct acpi_serdev_lookup *lookup = data; struct acpi_resource_uart_serialbus *sb; acpi_status status; - if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) - return 1; - - if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) + if (!serdev_acpi_get_uart_resource(ares, &sb)) return 1; if (lookup->index != -1 && lookup->n++ != lookup->index) return 1; - sb = &ares->data.uart_serial_bus; - status = acpi_get_handle(lookup->device_handle, sb->resource_source.string_ptr, &lookup->controller_handle); @@ -586,7 +608,7 @@ static int acpi_serdev_parse_resource(struct acpi_resource *ares, void *data) return 1; /* - * NOTE: Ideally, we would also want to retreive other properties here, + * NOTE: Ideally, we would also want to retrieve other properties here, * once setting them before opening the device is supported by serdev. */ diff --git a/include/linux/serdev.h b/include/linux/serdev.h index 9f14f9c12ec4..3368c261ab62 100644 --- a/include/linux/serdev.h +++ b/include/linux/serdev.h @@ -327,4 +327,18 @@ static inline int serdev_tty_port_unregister(struct tty_port *port) } #endif /* CONFIG_SERIAL_DEV_CTRL_TTYPORT */ +struct acpi_resource; +struct acpi_resource_uart_serialbus; + +#ifdef CONFIG_ACPI +bool serdev_acpi_get_uart_resource(struct acpi_resource *ares, + struct acpi_resource_uart_serialbus **uart); +#else +static inline bool serdev_acpi_get_uart_resource(struct acpi_resource *ares, + struct acpi_resource_uart_serialbus **uart) +{ + return false; +} +#endif /* CONFIG_ACPI */ + #endif /*_LINUX_SERDEV_H */