From patchwork Fri Apr 29 17:20:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?J=2E_Neusch=C3=A4fer?= X-Patchwork-Id: 12832467 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 DA487C4332F for ; Fri, 29 Apr 2022 17:21:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379564AbiD2RYo (ORCPT ); Fri, 29 Apr 2022 13:24:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235457AbiD2RYm (ORCPT ); Fri, 29 Apr 2022 13:24:42 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.17.21]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 693BA527F6; Fri, 29 Apr 2022 10:21:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1651252841; bh=IhOdbQHhR5x4m2YHZI3GQ3kZqNDq8I52f2wlB/H7xmQ=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=dA4cH0SDbhY7UYk9O9kn3Rwqm7xs44n0nL1OVpQtvTcXxiTqsuo/Rt4fI+B50M47A wW1hMSQlxpQ23uE0N53bUuxqy8jqu9v8ru5Pvd000/ow5s96FsuLOxWsvPMSIqnA9M I3URDEZpJhETZjK9I2rjEI3H07pf1C4z4vkSGG7w= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from longitude ([37.201.215.103]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MhU5b-1oP1uk2O5D-00egWU; Fri, 29 Apr 2022 19:20:41 +0200 From: =?utf-8?q?Jonathan_Neusch=C3=A4fer?= To: linux-clk@vger.kernel.org, openbmc@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Avi Fishman , Tomer Maimon , Tali Perry , Patrick Venture , Nancy Yuen , Benjamin Fair , Daniel Lezcano , Thomas Gleixner , Philipp Zabel , Wim Van Sebroeck , Guenter Roeck Subject: [PATCH v2 3/7] watchdog: npcm: Enable clock if provided Date: Fri, 29 Apr 2022 19:20:26 +0200 Message-Id: <20220429172030.398011-4-j.neuschaefer@gmx.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220429172030.398011-1-j.neuschaefer@gmx.net> References: <20220429172030.398011-1-j.neuschaefer@gmx.net> MIME-Version: 1.0 X-Provags-ID: V03:K1:66AxyOQT8oGkP067LNEqWrXN+/37a9u2A+gPdM7rlN8B6lFXd0C 8Vk9WD1HaD188zOsZF0JP1gnmOLarpkqZk6LLlwxgzV14Q4++88f76f2rp3T2edEAr6ldgm hw8mK0il9mfN4zu/KWIv2bu2HmDhQlbZa5yx/RW0B++GLzdq3+Bo/FtEbvOBlBAQddX6EKl Sm0ciC2AUtqmRWUgYx9Aw== X-UI-Out-Filterresults: notjunk:1;V03:K0:XW/wXwxEP5U=:79Z8+UWKUEfRNtNA52vATW wJFlpXQJKhon4qx2TxrMMafIyL42sVkPIPJc2rskAGgzgC/FOeO11fz/QefenLXsMdT2VELUZ 44RvnWRl9TPWPXFuNifEoW5suiHjvuY/oylL5uONKdU1IKO7S/05YD2iHDLQdJhosyUlszwca Ml7tmlixRU25mCTiCL74raMH9tMvSHlCe5iOvP6su/sorGLf8Wl0zthZY7d7afFMdaOkuJIBm g3TisDJASG5vMTJzvfDx2RLUS/WrRF0xtWuyyTuNgWVqN7tIPCuVaJY+w8kos6lSVqonJ0AIw K+DvAbjynU5mDgi57yL06M1vA0Zh/81frCfu3tr4x+ybQFFyY+8jmwzurKQkbzh+zK129HKMy Piqzc4u2jIhptvRb4wt2349hNO2QKXhEWFWvVE4nG+tO6AGA5qYjB9RyVLnrDY0m5ZrAO55VX 4HrmdaQFZkE1H+WuASdeVgkQ4/XSi92Nss09TT/whzE+coMujv1LjXxzu873DfEuM/JdV1dve /6BjlVdcZik3FxrfVEW8v3Y7Frb8aPbBGlu6kN+NUENulhgMQnPE69UtdeWeKh/wPGmyVy3Yo QnpdzhUU2eREX/6u+oxsrbQoWXUe7hEFJzRAoiJ7hV5DvtTNLCUbqvIu47Sw2bG7g2JGbMNQ3 xg1sseJbybmGgPZ6iB8EgHeoavAparMN3E5ZZYefvjp8WF0g/xbmKUdnh1v7mXrtYgLIfH7q7 kX0+uL/DGFayDSWpid6Oee0WV9Z4FJQlDKBaqXH8kf3vGfK0lnDBropu5VhG6NUxoKld8TEjx kxYHUnGvYf1yKfbaW8nepoWjH/MB8+ulZuMJCfBQNb9kVoHCQG/leKLHp2KNz549Xgu6pj3WZ 1/tmhHj3EwYY9IYDuizRfGxbGxXfS1Q4JsTbidV/g2km8iWaRf52h5uJ8j6e139mOg1Mnu9Cg doffYObyOKXwiMY3u7o9xeJ2627y0zmhgTrd5htadJt8Epe46DJt2NEnHSey+N4IGp5BKScFk cjxH7sV41R9R0XXihvJ9ZuF6liBUblweYxIhR7O/3sA9V4SSCMeabkEOwV2Y0kzARsDmkzMdp y3SNDVoqkCNZpY= Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org On the Nuvoton WPCM450 SoC, with its upcoming clock driver, peripheral clocks are individually gated and ungated. Therefore, the watchdog driver must be able to ungate the watchdog clock. Signed-off-by: Jonathan Neuschäfer Acked-by: Guenter Roeck --- v2: - Add clk_disable_unprepare call, suggested by Guenter Roeck v1: - https://lore.kernel.org/lkml/20220422183012.444674-4-j.neuschaefer@gmx.net/ --- drivers/watchdog/npcm_wdt.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) -- 2.35.1 diff --git a/drivers/watchdog/npcm_wdt.c b/drivers/watchdog/npcm_wdt.c index 28a24caa2627c..ee08d9805f966 100644 --- a/drivers/watchdog/npcm_wdt.c +++ b/drivers/watchdog/npcm_wdt.c @@ -3,6 +3,7 @@ // Copyright (c) 2018 IBM Corp. #include +#include #include #include #include @@ -43,6 +44,7 @@ struct npcm_wdt { struct watchdog_device wdd; void __iomem *reg; + struct clk *clk; }; static inline struct npcm_wdt *to_npcm_wdt(struct watchdog_device *wdd) @@ -66,6 +68,9 @@ static int npcm_wdt_start(struct watchdog_device *wdd) struct npcm_wdt *wdt = to_npcm_wdt(wdd); u32 val; + if (wdt->clk) + clk_prepare_enable(wdt->clk); + if (wdd->timeout < 2) val = 0x800; else if (wdd->timeout < 3) @@ -100,6 +105,9 @@ static int npcm_wdt_stop(struct watchdog_device *wdd) writel(0, wdt->reg); + if (wdt->clk) + clk_disable_unprepare(wdt->clk); + return 0; } @@ -191,6 +199,10 @@ static int npcm_wdt_probe(struct platform_device *pdev) if (IS_ERR(wdt->reg)) return PTR_ERR(wdt->reg); + wdt->clk = devm_clk_get_optional(&pdev->dev, NULL); + if (IS_ERR(wdt->clk)) + return PTR_ERR(wdt->clk); + irq = platform_get_irq(pdev, 0); if (irq < 0) return irq;