From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C249C433E0 for ; Wed, 24 Mar 2021 20:28:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5A6261A10 for ; Wed, 24 Mar 2021 20:28:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237892AbhCXU1h (ORCPT ); Wed, 24 Mar 2021 16:27:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237868AbhCXU11 (ORCPT ); Wed, 24 Mar 2021 16:27:27 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 543DFC061763 for ; Wed, 24 Mar 2021 13:27:26 -0700 (PDT) Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lPA5y-0002XA-LK; Wed, 24 Mar 2021 21:27:14 +0100 Received: from ukl by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1lPA5x-00028P-BU; Wed, 24 Mar 2021 21:27:13 +0100 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= To: Michael Turquette , Stephen Boyd , Alessandro Zummo , Alexandre Belloni , Nicolas Ferre , Ludovic Desroches Cc: linux-clk@vger.kernel.org, kernel@pengutronix.de, linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH] rtc: at91sma9: Simplify using devm_clk_get_enabled() Date: Wed, 24 Mar 2021 21:27:11 +0100 Message-Id: <20210324202711.76734-1-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210301135053.1462168-1-u.kleine-koenig@pengutronix.de> References: <20210301135053.1462168-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::c0 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-rtc@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org devm_clk_get_enabled() returns the clk already (prepared and) enabled and the automatically called cleanup cares for disabling (and unpreparing). So simplify .probe() and .remove() accordingly. Signed-off-by: Uwe Kleine-König --- Hello, this simplification depends on a patch set that introduces devm_clk_get_prepared() and friends. The most recent version of this patch set can be found at https://lore.kernel.org/r/20210301135053.1462168-1-u.kleine-koenig@pengutronix.de Unfortunately I didn't get any feedback at all from the clk maintainers on it, so I try to make other maintainers aware of it in the expectation that the simplifications are welcome and so lure the clk maintainers to share their thoughts. Best regards Uwe drivers/rtc/rtc-at91sam9.c | 22 ++++------------------ 1 file changed, 4 insertions(+), 18 deletions(-) diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c index 2216be429ab7..b52e7bd26303 100644 --- a/drivers/rtc/rtc-at91sam9.c +++ b/drivers/rtc/rtc-at91sam9.c @@ -374,21 +374,14 @@ static int at91_rtc_probe(struct platform_device *pdev) return -ENOMEM; } - rtc->sclk = devm_clk_get(&pdev->dev, NULL); + rtc->sclk = devm_clk_get_enabled(&pdev->dev, NULL); if (IS_ERR(rtc->sclk)) return PTR_ERR(rtc->sclk); - ret = clk_prepare_enable(rtc->sclk); - if (ret) { - dev_err(&pdev->dev, "Could not enable slow clock\n"); - return ret; - } - sclk_rate = clk_get_rate(rtc->sclk); if (!sclk_rate || sclk_rate > AT91_RTT_RTPRES) { dev_err(&pdev->dev, "Invalid slow clock rate\n"); - ret = -EINVAL; - goto err_clk; + return -EINVAL; } mr = rtt_readl(rtc, MR); @@ -406,7 +399,7 @@ static int at91_rtc_probe(struct platform_device *pdev) rtc->rtcdev = devm_rtc_allocate_device(&pdev->dev); if (IS_ERR(rtc->rtcdev)) { ret = PTR_ERR(rtc->rtcdev); - goto err_clk; + return ret; } rtc->rtcdev->ops = &at91_rtc_ops; @@ -418,7 +411,7 @@ static int at91_rtc_probe(struct platform_device *pdev) dev_name(&rtc->rtcdev->dev), rtc); if (ret) { dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq); - goto err_clk; + return ret; } /* NOTE: sam9260 rev A silicon has a ROM bug which resets the @@ -432,11 +425,6 @@ static int at91_rtc_probe(struct platform_device *pdev) dev_name(&rtc->rtcdev->dev)); return devm_rtc_register_device(rtc->rtcdev); - -err_clk: - clk_disable_unprepare(rtc->sclk); - - return ret; } /* @@ -450,8 +438,6 @@ static int at91_rtc_remove(struct platform_device *pdev) /* disable all interrupts */ rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN)); - clk_disable_unprepare(rtc->sclk); - return 0; } -- 2.30.2