Linux-Clk Archive on lore.kernel.org
 help / color / Atom feed
From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: linux-clk@vger.kernel.org, kernel@pengutronix.de,
	linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 4/6] rtc: at91sam9: Simplify using devm_clk_get_enabled()
Date: Mon, 26 Apr 2021 16:17:28 +0200
Message-ID: <20210426141730.2826832-5-u.kleine-koenig@pengutronix.de> (raw)
In-Reply-To: <20210426141730.2826832-1-u.kleine-koenig@pengutronix.de>

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.

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 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


  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-26 14:17 [PATCH v6 0/6] clk: provide new devm helpers for prepared and enabled clocks Uwe Kleine-König
2021-04-26 14:17 ` [PATCH v6 1/6] clk: generalize devm_clk_get() a bit Uwe Kleine-König
2021-04-26 14:17 ` [PATCH v6 2/6] clk: Provide new devm_clk_helpers for prepared and enabled clocks Uwe Kleine-König
2021-04-26 14:17 ` [PATCH v6 3/6] pwm: atmel: Simplify using devm_clk_get_prepared() Uwe Kleine-König
2021-04-26 14:17 ` Uwe Kleine-König [this message]
2021-04-26 14:17 ` [PATCH v6 5/6] i2c: imx: Simplify using devm_clk_get_enabled() Uwe Kleine-König
2021-04-26 14:17 ` [PATCH v6 6/6] spi: davinci: " Uwe Kleine-König

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210426141730.2826832-5-u.kleine-koenig@pengutronix.de \
    --to=u.kleine-koenig@pengutronix.de \
    --cc=a.zummo@towertech.it \
    --cc=alexandre.belloni@bootlin.com \
    --cc=kernel@pengutronix.de \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-clk@vger.kernel.org \
    --cc=linux-rtc@vger.kernel.org \
    --cc=ludovic.desroches@microchip.com \
    --cc=mturquette@baylibre.com \
    --cc=nicolas.ferre@microchip.com \
    --cc=sboyd@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Clk Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-clk/0 linux-clk/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-clk linux-clk/ https://lore.kernel.org/linux-clk \
		linux-clk@vger.kernel.org
	public-inbox-index linux-clk

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-clk


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git