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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 436AFC433EF for ; Wed, 11 May 2022 23:19:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349248AbiEKXTO (ORCPT ); Wed, 11 May 2022 19:19:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46056 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349100AbiEKXSc (ORCPT ); Wed, 11 May 2022 19:18:32 -0400 Received: from mail.baikalelectronics.ru (mail.baikalelectronics.com [87.245.175.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CB354185C82; Wed, 11 May 2022 16:18:27 -0700 (PDT) Received: from mail.baikalelectronics.ru (unknown [192.168.51.25]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 88A0ABB9; Thu, 12 May 2022 02:19:07 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.baikalelectronics.ru 88A0ABB9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baikalelectronics.ru; s=mail; t=1652311147; bh=ghQlSwR0k/fSp9BKKIsDgiCPjiVeG/HGpUtiHAxSYNU=; h=From:To:CC:Subject:Date:In-Reply-To:References:From; b=iyfHYuGLu7YL8QriBlEGMvDOL7zXT05QTba3ZZaklSm242SUuYd0Kt83aemFxdc6Y W4VUvOwCTbyWjEoX8juE2PZGuWhlzSY7oVmebth0dSVpsAwPjUsWsuUk/o7O4+duPb Icz4qhvRW4CoBLz/Mibk7fnhX8gBvtM1uQ8xrewc= Received: from localhost (192.168.53.207) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 12 May 2022 02:18:20 +0300 From: Serge Semin To: Damien Le Moal , Hans de Goede , Jens Axboe CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , Rob Herring , , , Subject: [PATCH v3 06/23] ata: libahci_platform: Convert to using platform devm-ioremap methods Date: Thu, 12 May 2022 02:17:53 +0300 Message-ID: <20220511231810.4928-7-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20220511231810.4928-1-Sergey.Semin@baikalelectronics.ru> References: <20220511231810.4928-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently the IOMEM AHCI registers space is mapped by means of the two functions invocation: platform_get_resource() is used to get the very first memory resource and devm_ioremap_resource() is called to remap that resource. Device-managed kernel API provides a handy wrapper to perform the same in single function call: devm_platform_ioremap_resource(). While at it seeing many AHCI platform drivers rely on having the AHCI CSR space marked with "ahci" name let's first try to find and remap the CSR IO-mem with that name and only if it fails fallback to getting the very first registers space platform resource. Signed-off-by: Serge Semin --- Changelog v2: - Check whether there is "ahhi" reg resource before using the devm_platform_ioremap_resource_byname() method in order to prevent a false error message printed in the log (@Damien) - Slightly update the patch title due to the change above and to be more specific that the platform device managed methods are utilized. --- drivers/ata/libahci_platform.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c index f7f9bfcfc164..8c9fbcc3043b 100644 --- a/drivers/ata/libahci_platform.c +++ b/drivers/ata/libahci_platform.c @@ -404,8 +404,14 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev, devres_add(dev, hpriv); - hpriv->mmio = devm_ioremap_resource(dev, - platform_get_resource(pdev, IORESOURCE_MEM, 0)); + /* + * If the DT provided an "ahci" named resource, use it. Otherwise, + * fallback to using the default first resource for the device node. + */ + if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "ahci")) + hpriv->mmio = devm_platform_ioremap_resource_byname(pdev, "ahci"); + else + hpriv->mmio = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(hpriv->mmio)) { rc = PTR_ERR(hpriv->mmio); goto err_out; -- 2.35.1