From patchwork Thu Dec 16 21:47:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 12682775 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 A207BC433EF for ; Thu, 16 Dec 2021 21:47:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231388AbhLPVr4 (ORCPT ); Thu, 16 Dec 2021 16:47:56 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:36568 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229840AbhLPVrz (ORCPT ); Thu, 16 Dec 2021 16:47:55 -0500 X-IronPort-AV: E=Sophos;i="5.88,212,1635174000"; d="scan'208";a="104202773" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 17 Dec 2021 06:47:54 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 4422841114A8; Fri, 17 Dec 2021 06:47:52 +0900 (JST) From: Lad Prabhakar To: Wim Van Sebroeck , Guenter Roeck , Krzysztof Kozlowski , linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Prabhakar , Rob Herring , Lad Prabhakar Subject: [PATCH v2] watchdog: s3c2410: Use platform_get_irq() to get the interrupt Date: Thu, 16 Dec 2021 21:47:47 +0000 Message-Id: <20211216214747.10454-1-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static allocation of IRQ resources in DT core code, this causes an issue when using hierarchical interrupt domains using "interrupts" property in the node as this bypassed the hierarchical setup and messed up the irq chaining. In preparation for removal of static setup of IRQ resource from DT core code use platform_get_irq(). Signed-off-by: Lad Prabhakar Reviewed-by: Guenter Roeck Reviewed-by: Krzysztof Kozlowski --- v1->v2 * Dropped goto and directly returned on error --- drivers/watchdog/s3c2410_wdt.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c index 2395f353e52d..d92bc1c24182 100644 --- a/drivers/watchdog/s3c2410_wdt.c +++ b/drivers/watchdog/s3c2410_wdt.c @@ -513,9 +513,9 @@ static int s3c2410wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct s3c2410_wdt *wdt; - struct resource *wdt_irq; unsigned int wtcon; int started = 0; + int wdt_irq; int ret; wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); @@ -536,12 +536,9 @@ static int s3c2410wdt_probe(struct platform_device *pdev) } } - wdt_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (wdt_irq == NULL) { - dev_err(dev, "no irq resource specified\n"); - ret = -ENOENT; - goto err; - } + wdt_irq = platform_get_irq(pdev, 0); + if (wdt_irq < 0) + return wdt_irq; /* get the memory region for the watchdog timer */ wdt->reg_base = devm_platform_ioremap_resource(pdev, 0); @@ -592,8 +589,8 @@ static int s3c2410wdt_probe(struct platform_device *pdev) dev_info(dev, "default timer value is out of range, cannot start\n"); } - ret = devm_request_irq(dev, wdt_irq->start, s3c2410wdt_irq, 0, - pdev->name, pdev); + ret = devm_request_irq(dev, wdt_irq, s3c2410wdt_irq, 0, + pdev->name, pdev); if (ret != 0) { dev_err(dev, "failed to install irq (%d)\n", ret); goto err_cpufreq;