linux-kernel - [PATCH v3 2/2] rtc: s5m: use devm_i2c_new_dummy

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Message-Id: <20210107134203.9388-2-brgl@bgdev.pl>
Date:   Thu,  7 Jan 2021 14:42:03 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-rtc@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH v3 2/2] rtc: s5m: use devm_i2c_new_dummy_device()

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Use the managed variant of i2c_new_dummy_device() to shrink code and
remove the goto label. We can drop the remove callback now too.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
v1 -> v2:
- remove the remove() callback

v2 -> v3:
- fix an error pointed out by the build robot

 drivers/rtc/rtc-s5m.c | 34 ++++++++--------------------------
 1 file changed, 8 insertions(+), 26 deletions(-)

diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
index e0011d3cf61b..b492070afe6a 100644
--- a/drivers/rtc/rtc-s5m.c
+++ b/drivers/rtc/rtc-s5m.c
@@ -760,7 +760,8 @@ static int s5m_rtc_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	info->i2c = i2c_new_dummy_device(s5m87xx->i2c->adapter, RTC_I2C_ADDR);
+	info->i2c = devm_i2c_new_dummy_device(&pdev->dev, s5m87xx->i2c->adapter,
+					      RTC_I2C_ADDR);
 	if (IS_ERR(info->i2c)) {
 		dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n");
 		return PTR_ERR(info->i2c);
@@ -768,10 +769,9 @@ static int s5m_rtc_probe(struct platform_device *pdev)
 
 	info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg);
 	if (IS_ERR(info->regmap)) {
-		ret = PTR_ERR(info->regmap);
 		dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n",
-				ret);
-		goto err;
+			PTR_ERR(info->regmap));
+		return PTR_ERR(info->regmap);
 	}
 
 	info->dev = &pdev->dev;
@@ -781,10 +781,9 @@ static int s5m_rtc_probe(struct platform_device *pdev)
 	if (s5m87xx->irq_data) {
 		info->irq = regmap_irq_get_virq(s5m87xx->irq_data, alarm_irq);
 		if (info->irq <= 0) {
-			ret = -EINVAL;
 			dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
 				alarm_irq);
-			goto err;
+			return -EINVAL;
 		}
 	}
 
@@ -799,10 +798,8 @@ static int s5m_rtc_probe(struct platform_device *pdev)
 	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
 						 &s5m_rtc_ops, THIS_MODULE);
 
-	if (IS_ERR(info->rtc_dev)) {
-		ret = PTR_ERR(info->rtc_dev);
-		goto err;
-	}
+	if (IS_ERR(info->rtc_dev))
+		return PTR_ERR(info->rtc_dev);
 
 	if (!info->irq) {
 		dev_info(&pdev->dev, "Alarm IRQ not available\n");
@@ -815,23 +812,9 @@ static int s5m_rtc_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
 			info->irq, ret);
-		goto err;
+		return ret;
 	}
 
-	return 0;
-
-err:
-	i2c_unregister_device(info->i2c);
-
-	return ret;
-}
-
-static int s5m_rtc_remove(struct platform_device *pdev)
-{
-	struct s5m_rtc_info *info = platform_get_drvdata(pdev);
-
-	i2c_unregister_device(info->i2c);
-
 	return 0;
 }
 
@@ -876,7 +859,6 @@ static struct platform_driver s5m_rtc_driver = {
 		.pm	= &s5m_rtc_pm_ops,
 	},
 	.probe		= s5m_rtc_probe,
-	.remove		= s5m_rtc_remove,
 	.id_table	= s5m_rtc_id,
 };
 
-- 
2.29.1