From patchwork Mon Jul 22 12:14:31 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerhard Sittig X-Patchwork-Id: 2831326 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 501449F4D4 for ; Mon, 22 Jul 2013 12:19:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 96BA02017D for ; Mon, 22 Jul 2013 12:19:26 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 247892016A for ; Mon, 22 Jul 2013 12:19:25 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V1F3I-0007vw-EN; 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Mon, 22 Jul 2013 14:15:32 +0200 (CEST) X-Auth-Info: crlGjuel7Ac2kMzcWj1b+lXvUk3E85iNTQM6gZCEheQ= Received: from localhost (host-82-135-33-74.customer.m-online.net [82.135.33.74]) by mail.mnet-online.de (Postfix) with ESMTPA; Mon, 22 Jul 2013 14:15:32 +0200 (CEST) From: Gerhard Sittig To: linuxppc-dev@lists.ozlabs.org, Anatolij Gustschin , Mike Turquette , linux-arm-kernel@lists.infradead.org, devicetree-discuss@lists.ozlabs.org Subject: [PATCH v3 04/31] mtd: mpc5121_nfc: cleanup clock API use Date: Mon, 22 Jul 2013 14:14:31 +0200 Message-Id: <1374495298-22019-5-git-send-email-gsi@denx.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1374495298-22019-1-git-send-email-gsi@denx.de> References: <1374166855-7280-1-git-send-email-gsi@denx.de> <1374495298-22019-1-git-send-email-gsi@denx.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130722_081600_297372_6296ABB7 X-CRM114-Status: GOOD ( 11.66 ) X-Spam-Score: -1.9 (-) Cc: Detlev Zundel , Wolfram Sang , Greg Kroah-Hartman , Gerhard Sittig , Rob Herring , Mark Brown , Marc Kleine-Budde , Pantelis Antoniou , David Woodhouse , Wolfgang Grandegger , Mauro Carvalho Chehab X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP prepare before enable isn't optional, do check for and propagate clock setup errors, adjust error code paths to correctly balance get/put and prepare/unprepare and enable/disable, use devm_{get,put}_clk() Signed-off-by: Gerhard Sittig --- drivers/mtd/nand/mpc5121_nfc.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/mtd/nand/mpc5121_nfc.c b/drivers/mtd/nand/mpc5121_nfc.c index 3c9cdcb..9c0b8fe 100644 --- a/drivers/mtd/nand/mpc5121_nfc.c +++ b/drivers/mtd/nand/mpc5121_nfc.c @@ -618,8 +618,8 @@ static void mpc5121_nfc_free(struct device *dev, struct mtd_info *mtd) struct mpc5121_nfc_prv *prv = chip->priv; if (prv->clk) { - clk_disable(prv->clk); - clk_put(prv->clk); + clk_disable_unprepare(prv->clk); + devm_clk_put(dev, prv->clk); } if (prv->csreg) @@ -629,6 +629,7 @@ static void mpc5121_nfc_free(struct device *dev, struct mtd_info *mtd) static int mpc5121_nfc_probe(struct platform_device *op) { struct device_node *rootnode, *dn = op->dev.of_node; + struct clk *clk; struct device *dev = &op->dev; struct mpc5121_nfc_prv *prv; struct resource res; @@ -730,14 +731,19 @@ static int mpc5121_nfc_probe(struct platform_device *op) of_node_put(rootnode); /* Enable NFC clock */ - prv->clk = clk_get(dev, "nfc_clk"); - if (IS_ERR(prv->clk)) { + clk = devm_clk_get(dev, "nfc_clk"); + if (IS_ERR(clk)) { dev_err(dev, "Unable to acquire NFC clock!\n"); - retval = PTR_ERR(prv->clk); + retval = PTR_ERR(clk); goto error; } - - clk_enable(prv->clk); + retval = clk_prepare_enable(clk); + if (retval) { + dev_err(dev, "Unable to enable NFC clock!\n"); + devm_clk_put(dev, clk); + goto error; + } + prv->clk = clk; /* Reset NAND Flash controller */ nfc_set(mtd, NFC_CONFIG1, NFC_RESET);