linux-kernel - [PATCH 1/7] rtc:rtc-at91rm9200:Use devm_clk_get

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Message-Id: <20240821092846.20138-2-liaoyuanhong@vivo.com>
Date: Wed, 21 Aug 2024 17:28:40 +0800
From: Liao Yuanhong <liaoyuanhong@...o.com>
To: alexandre.belloni@...tlin.com,
	linux-rtc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Liao Yuanhong <liaoyuanhong@...o.com>
Subject: [PATCH 1/7] rtc:rtc-at91rm9200:Use devm_clk_get_enabled() helpers

Use devm_clk_get_enabled() instead of clk functions in rtc-at91rm9200.

Signed-off-by: Liao Yuanhong <liaoyuanhong@...o.com>
---
 drivers/rtc/rtc-at91rm9200.c | 18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index c16fe711a0d9..81b2556930bb 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -498,14 +498,9 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
 		return PTR_ERR(rtc);
 	platform_set_drvdata(pdev, rtc);
 
-	sclk = devm_clk_get(&pdev->dev, NULL);
+	sclk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(sclk))
 		return PTR_ERR(sclk);
-
-	ret = clk_prepare_enable(sclk);
-	if (ret) {
-		dev_err(&pdev->dev, "Could not enable slow clock\n");
-		return ret;
 	}
 
 	at91_rtc_write(AT91_RTC_CR, 0);
@@ -521,7 +516,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
 			       "at91_rtc", pdev);
 	if (ret) {
 		dev_err(&pdev->dev, "IRQ %d already in use.\n", irq);
-		goto err_clk;
+		return ret;
 	}
 
 	/* cpu init code should really have flagged this device as
@@ -539,7 +534,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
 	rtc->range_max = RTC_TIMESTAMP_END_2099;
 	ret = devm_rtc_register_device(rtc);
 	if (ret)
-		goto err_clk;
+		return ret;
 
 	/* enable SECEV interrupt in order to initialize at91_rtc_upd_rdy
 	 * completion.
@@ -548,11 +543,6 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
 
 	dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n");
 	return 0;
-
-err_clk:
-	clk_disable_unprepare(sclk);
-
-	return ret;
 }
 
 /*
@@ -564,8 +554,6 @@ static void __exit at91_rtc_remove(struct platform_device *pdev)
 	at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM |
 					AT91_RTC_SECEV | AT91_RTC_TIMEV |
 					AT91_RTC_CALEV);
-
-	clk_disable_unprepare(sclk);
 }
 
 static void at91_rtc_shutdown(struct platform_device *pdev)
-- 
2.25.1