From patchwork Thu Aug 24 13:55:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13364217 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 5DD8EC71145 for ; Thu, 24 Aug 2023 13:56:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234560AbjHXNzk (ORCPT ); Thu, 24 Aug 2023 09:55:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240972AbjHXNzd (ORCPT ); Thu, 24 Aug 2023 09:55:33 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 854851711 for ; Thu, 24 Aug 2023 06:55:31 -0700 (PDT) Received: from kwepemi500008.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4RWl1K4zjDz1L9Ll; Thu, 24 Aug 2023 21:53:57 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemi500008.china.huawei.com (7.221.188.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Thu, 24 Aug 2023 21:55:28 +0800 From: Jinjie Ruan To: , , , , , , , CC: Subject: [PATCH -next 1/3] watchdog: at91sam9_wdt: Use the devm_clk_get_enabled() helper function Date: Thu, 24 Aug 2023 21:55:12 +0800 Message-ID: <20230824135514.2661364-2-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemi500008.china.huawei.com (7.221.188.139) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org The devm_clk_get_enabled() helper: - calls devm_clk_get() - calls clk_prepare_enable() and registers what is needed in order to call clk_disable_unprepare() when needed, as a managed resource. This simplifies the code. Signed-off-by: Jinjie Ruan Reviewed-by: Guenter Roeck Reviewed-by: Claudiu Beznea --- drivers/watchdog/at91sam9_wdt.c | 20 +++++--------------- 1 file changed, 5 insertions(+), 15 deletions(-) diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c index fed7be246442..b111b28acb94 100644 --- a/drivers/watchdog/at91sam9_wdt.c +++ b/drivers/watchdog/at91sam9_wdt.c @@ -348,25 +348,21 @@ static int __init at91wdt_probe(struct platform_device *pdev) if (IS_ERR(wdt->base)) return PTR_ERR(wdt->base); - wdt->sclk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(wdt->sclk)) - return PTR_ERR(wdt->sclk); - - err = clk_prepare_enable(wdt->sclk); - if (err) { + wdt->sclk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(wdt->sclk)) { dev_err(&pdev->dev, "Could not enable slow clock\n"); - return err; + return PTR_ERR(wdt->sclk); } if (pdev->dev.of_node) { err = of_at91wdt_init(pdev->dev.of_node, wdt); if (err) - goto err_clk; + return err; } err = at91_wdt_init(pdev, wdt); if (err) - goto err_clk; + return err; platform_set_drvdata(pdev, wdt); @@ -374,11 +370,6 @@ static int __init at91wdt_probe(struct platform_device *pdev) wdt->wdd.timeout, wdt->nowayout); return 0; - -err_clk: - clk_disable_unprepare(wdt->sclk); - - return err; } static int __exit at91wdt_remove(struct platform_device *pdev) @@ -388,7 +379,6 @@ static int __exit at91wdt_remove(struct platform_device *pdev) pr_warn("I quit now, hardware will probably reboot!\n"); del_timer(&wdt->timer); - clk_disable_unprepare(wdt->sclk); return 0; }