1 files changed, 24 insertions, 48 deletions

diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index 0e134777bd..3343b54e8e 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -246,6 +246,14 @@ static int mt6577_auxadc_suspend(struct device *dev)
 	return 0;
 }
 
+static void mt6577_power_off(void *data)
+{
+	struct mt6577_auxadc_device *adc_dev = data;
+
+	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+			      0, MT6577_AUXADC_PDN_EN);
+}
+
 static int mt6577_auxadc_probe(struct platform_device *pdev)
 {
 	struct mt6577_auxadc_device *adc_dev;
@@ -265,29 +273,18 @@ static int mt6577_auxadc_probe(struct platform_device *pdev)
 	indio_dev->num_channels = ARRAY_SIZE(mt6577_auxadc_iio_channels);
 
 	adc_dev->reg_base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(adc_dev->reg_base)) {
-		dev_err(&pdev->dev, "failed to get auxadc base address\n");
-		return PTR_ERR(adc_dev->reg_base);
-	}
-
-	adc_dev->adc_clk = devm_clk_get(&pdev->dev, "main");
-	if (IS_ERR(adc_dev->adc_clk)) {
-		dev_err(&pdev->dev, "failed to get auxadc clock\n");
-		return PTR_ERR(adc_dev->adc_clk);
-	}
+	if (IS_ERR(adc_dev->reg_base))
+		return dev_err_probe(&pdev->dev, PTR_ERR(adc_dev->reg_base),
+				     "failed to get auxadc base address\n");
 
-	ret = clk_prepare_enable(adc_dev->adc_clk);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to enable auxadc clock\n");
-		return ret;
-	}
+	adc_dev->adc_clk = devm_clk_get_enabled(&pdev->dev, "main");
+	if (IS_ERR(adc_dev->adc_clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(adc_dev->adc_clk),
+				     "failed to enable auxadc clock\n");
 
 	adc_clk_rate = clk_get_rate(adc_dev->adc_clk);
-	if (!adc_clk_rate) {
-		ret = -EINVAL;
-		dev_err(&pdev->dev, "null clock rate\n");
-		goto err_disable_clk;
-	}
+	if (!adc_clk_rate)
+		return dev_err_probe(&pdev->dev, -EINVAL, "null clock rate\n");
 
 	adc_dev->dev_comp = device_get_match_data(&pdev->dev);
 
@@ -296,36 +293,16 @@ static int mt6577_auxadc_probe(struct platform_device *pdev)
 	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
 			      MT6577_AUXADC_PDN_EN, 0);
 	mdelay(MT6577_AUXADC_POWER_READY_MS);
-
 	platform_set_drvdata(pdev, indio_dev);
 
-	ret = iio_device_register(indio_dev);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "failed to register iio device\n");
-		goto err_power_off;
-	}
-
-	return 0;
-
-err_power_off:
-	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
-			      0, MT6577_AUXADC_PDN_EN);
-err_disable_clk:
-	clk_disable_unprepare(adc_dev->adc_clk);
-	return ret;
-}
-
-static int mt6577_auxadc_remove(struct platform_device *pdev)
-{
-	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
-	struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
+	ret = devm_add_action_or_reset(&pdev->dev, mt6577_power_off, adc_dev);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "Failed to add action to managed power off\n");
 
-	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
-			      0, MT6577_AUXADC_PDN_EN);
-
-	clk_disable_unprepare(adc_dev->adc_clk);
+	ret = devm_iio_device_register(&pdev->dev, indio_dev);
+	if (ret < 0)
+		return dev_err_probe(&pdev->dev, ret, "failed to register iio device\n");
 
 	return 0;
 }
@@ -352,7 +329,6 @@ static struct platform_driver mt6577_auxadc_driver = {
 		.pm = pm_sleep_ptr(&mt6577_auxadc_pm_ops),
 	},
 	.probe	= mt6577_auxadc_probe,
-	.remove	= mt6577_auxadc_remove,
 };
 module_platform_driver(mt6577_auxadc_driver);