linux-kernel - [PATCH] rtc: snvs: Use devm_add_action_or_reset() for calls to clk_disable

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Date:   Fri, 13 Mar 2020 22:30:49 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     a.zummo@...ertech.it, alexandre.belloni@...tlin.com,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH] rtc: snvs: Use devm_add_action_or_reset() for calls to clk_disable_unprepare()

Use devm_add_action_or_reset() for calls to clk_disable_unprepare(),
which can simplify the error handling.

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
 drivers/rtc/rtc-snvs.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index 7630089..319ed1d 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -263,6 +263,12 @@ static const struct regmap_config snvs_rtc_config = {
 	.reg_stride = 4,
 };
 
+static void snvs_rtc_action(void *data)
+{
+	if (data)
+		clk_disable_unprepare(data);
+}
+
 static int snvs_rtc_probe(struct platform_device *pdev)
 {
 	struct snvs_rtc_data *data;
@@ -313,6 +319,10 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 		}
 	}
 
+	ret = devm_add_action_or_reset(&pdev->dev, snvs_rtc_action, data->clk);
+	if (ret)
+		return ret;
+
 	platform_set_drvdata(pdev, data);
 
 	/* Initialize glitch detect */
@@ -325,7 +335,7 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 	ret = snvs_rtc_enable(data, true);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to enable rtc %d\n", ret);
-		goto error_rtc_device_register;
+		return ret;
 	}
 
 	device_init_wakeup(&pdev->dev, true);
@@ -338,22 +348,14 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_err(&pdev->dev, "failed to request irq %d: %d\n",
 			data->irq, ret);
-		goto error_rtc_device_register;
+		return ret;
 	}
 
 	data->rtc->ops = &snvs_rtc_ops;
 	data->rtc->range_max = U32_MAX;
 	ret = rtc_register_device(data->rtc);
-	if (ret) {
+	if (ret)
 		dev_err(&pdev->dev, "failed to register rtc: %d\n", ret);
-		goto error_rtc_device_register;
-	}
-
-	return 0;
-
-error_rtc_device_register:
-	if (data->clk)
-		clk_disable_unprepare(data->clk);
 
 	return ret;
 }
-- 
2.7.4