From patchwork Mon Jul 10 20:27:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kaiser X-Patchwork-Id: 13307594 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DE920EB64DC for ; Mon, 10 Jul 2023 20:30:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=LI4LvBaJ+Qx8NI9vIcgaPbxtYuVt81b9roKcnNgrZzA=; b=G9rdQ1HNNdhuaI 9jBkIC1HNjj2tsc32WDOyoBjpCyFtzhBswru8j0TxI5xgHL2BWWIC8SYsztE1v3Kwekmk3ZhdIR17 jvR6QreHFTukb2uGEhsvOrukUID9CaUokyxUPq11yuizuwDJMPqivdbBtB3ZgBRUpsl28kxUj9ZGm 6VanvLgjD1uZMyfpgW6j6xm/BmcDP91L7g7jx6iZdW3kA0A9w80CIJMjDBQPKU2MOO2Mirqa10O41 QmCrqWxLAqdSiJVVPskKD99X9GlDFWctNfoPVH7jhHvs0UO4kNyUW2H87IirSXEg6V5+53LRIS/X6 dyOptI7WPyaLULVrjAew==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qIxW2-00CfUX-2e; Mon, 10 Jul 2023 20:29:50 +0000 Received: from viti.kaiser.cx ([2a01:238:43fe:e600:cd0c:bd4a:7a3:8e9f]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qIxVt-00CfMR-0H for linux-arm-kernel@lists.infradead.org; Mon, 10 Jul 2023 20:29:42 +0000 Received: from 250.57.4.146.static.wline.lns.sme.cust.swisscom.ch ([146.4.57.250] helo=martin-debian-2.paytec.ch) by viti.kaiser.cx with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1qIxVf-0002mg-OH; Mon, 10 Jul 2023 22:29:27 +0200 From: Martin Kaiser To: Herbert Xu Cc: aric.pzqi@ingenic.com, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Martin Kaiser Subject: [PATCH 4/7] hwrng: ingenic - use devm_clk_get_enabled Date: Mon, 10 Jul 2023 22:27:30 +0200 Message-Id: <20230710202733.116133-5-martin@kaiser.cx> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230710202733.116133-1-martin@kaiser.cx> References: <20230710202733.116133-1-martin@kaiser.cx> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230710_132941_304994_C6ACCDB6 X-CRM114-Status: GOOD ( 13.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Use devm_clk_get_enabled in the ingenic-trng driver. We don't have to disable and unprepare the clock any more in error paths or in the remove function. Signed-off-by: Martin Kaiser --- drivers/char/hw_random/ingenic-trng.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) diff --git a/drivers/char/hw_random/ingenic-trng.c b/drivers/char/hw_random/ingenic-trng.c index bfec28ceab00..906fa78de47e 100644 --- a/drivers/char/hw_random/ingenic-trng.c +++ b/drivers/char/hw_random/ingenic-trng.c @@ -29,7 +29,6 @@ struct ingenic_trng { void __iomem *base; - struct clk *clk; struct hwrng rng; }; @@ -77,6 +76,7 @@ static int ingenic_trng_read(struct hwrng *rng, void *buf, size_t max, bool wait static int ingenic_trng_probe(struct platform_device *pdev) { struct ingenic_trng *trng; + struct clk *clk; int ret; trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL); @@ -89,16 +89,10 @@ static int ingenic_trng_probe(struct platform_device *pdev) return PTR_ERR(trng->base); } - trng->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(trng->clk)) { - pr_crit("%s: Cannot get DTRNG clock\n", __func__); - return PTR_ERR(trng->clk); - } - - ret = clk_prepare_enable(trng->clk); - if (ret) { - pr_crit("%s: Unable to enable DTRNG clock\n", __func__); - return ret; + clk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(clk)) { + pr_crit("%s: Cannot get and enable DTRNG clock\n", __func__); + return PTR_ERR(clk); } trng->rng.name = pdev->name; @@ -109,17 +103,13 @@ static int ingenic_trng_probe(struct platform_device *pdev) ret = hwrng_register(&trng->rng); if (ret) { dev_err(&pdev->dev, "Failed to register hwrng\n"); - goto err_unprepare_clk; + return ret; } platform_set_drvdata(pdev, trng); dev_info(&pdev->dev, "Ingenic DTRNG driver registered\n"); return 0; - -err_unprepare_clk: - clk_disable_unprepare(trng->clk); - return ret; } static int ingenic_trng_remove(struct platform_device *pdev) @@ -133,8 +123,6 @@ static int ingenic_trng_remove(struct platform_device *pdev) ctrl &= ~CFG_GEN_EN; writel(ctrl, trng->base + TRNG_REG_CFG_OFFSET); - clk_disable_unprepare(trng->clk); - return 0; }