From patchwork Thu Sep 2 06:37:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cai,Huoqing" X-Patchwork-Id: 12470869 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=ham 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 34876C43216 for ; Thu, 2 Sep 2021 06:37:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1613E61059 for ; Thu, 2 Sep 2021 06:37:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242118AbhIBGiN (ORCPT ); Thu, 2 Sep 2021 02:38:13 -0400 Received: from mx21.baidu.com ([220.181.3.85]:35780 "EHLO baidu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S239574AbhIBGiM (ORCPT ); Thu, 2 Sep 2021 02:38:12 -0400 Received: from BJHW-Mail-Ex06.internal.baidu.com (unknown [10.127.64.16]) by Forcepoint Email with ESMTPS id 60EBCE156FEC99B0549B; Thu, 2 Sep 2021 14:37:10 +0800 (CST) Received: from BJHW-MAIL-EX27.internal.baidu.com (10.127.64.42) by BJHW-Mail-Ex06.internal.baidu.com (10.127.64.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Thu, 2 Sep 2021 14:37:10 +0800 Received: from LAPTOP-UKSR4ENP.internal.baidu.com (172.31.63.8) by BJHW-MAIL-EX27.internal.baidu.com (10.127.64.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Thu, 2 Sep 2021 14:37:09 +0800 From: Cai Huoqing To: , , , , , , , , , , CC: , , , , , Cai Huoqing Subject: [PATCH v2 1/3] driver core: platform: Add the helper function devm_platform_get_and_ioremap_resource_byname() Date: Thu, 2 Sep 2021 14:37:00 +0800 Message-ID: <20210902063702.32066-2-caihuoqing@baidu.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210902063702.32066-1-caihuoqing@baidu.com> References: <20210902063702.32066-1-caihuoqing@baidu.com> MIME-Version: 1.0 X-Originating-IP: [172.31.63.8] X-ClientProxiedBy: BC-Mail-Ex28.internal.baidu.com (172.31.51.22) To BJHW-MAIL-EX27.internal.baidu.com (10.127.64.42) X-Baidu-BdMsfe-DateCheck: 1_BJHW-Mail-Ex06_2021-09-02 14:37:10:371 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Since provide the helper function devm_platform_ioremap_resource_byname() which is wrap platform_get_resource_byname() and devm_ioremap_resource(). But sometimes, many drivers still need to use the resource variables obtained by platform_get_resource(). In these cases, provide this helper function devm_platform_get_and_ioremap_resource_byname(). Signed-off-by: Cai Huoqing --- v1->v2: Resend this patch as part of a patch series that uses the new function. drivers/base/platform.c | 30 ++++++++++++++++++++++++++---- include/linux/platform_device.h | 3 +++ 2 files changed, 29 insertions(+), 4 deletions(-) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 652531f67135..34bb581338d9 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -124,6 +124,31 @@ void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev, } EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource); +/** + * devm_platform_get_and_ioremap_resource_byname - call devm_ioremap_resource() for a + * platform device and get resource + * + * @pdev: platform device to use both for memory resource lookup as well as + * resource management + * @name: name of the resource + * @res: optional output parameter to store a pointer to the obtained resource. + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. + */ +void __iomem * +devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev, + const char *name, struct resource **res) +{ + struct resource *r; + + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + if (res) + *res = r; + return devm_ioremap_resource(&pdev->dev, r); +} +EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource_byname); + /** * devm_platform_ioremap_resource_byname - call devm_ioremap_resource for * a platform device, retrieve the @@ -140,10 +165,7 @@ void __iomem * devm_platform_ioremap_resource_byname(struct platform_device *pdev, const char *name) { - struct resource *res; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); - return devm_ioremap_resource(&pdev->dev, res); + return devm_platform_get_and_ioremap_resource_byname(pdev, name, NULL); } EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname); #endif /* CONFIG_HAS_IOMEM */ diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 7c96f169d274..50eb1a5b503a 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -66,6 +66,9 @@ extern void __iomem * devm_platform_ioremap_resource(struct platform_device *pdev, unsigned int index); extern void __iomem * +devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev, + const char *name, struct resource **res); +extern void __iomem * devm_platform_ioremap_resource_byname(struct platform_device *pdev, const char *name); extern int platform_get_irq(struct platform_device *, unsigned int);