iio: adc: cc10001: Add local struct device *dev variable to avoid repitition

There are lots of uses of this in probe() and we are about to introduce
some more, so add a local variable to simplify this.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20221016170950.387751-2-jic23@kernel.org

drivers/iio/adc/cc10001_adc.c

@@ -307,14 +307,15 @@ static int cc10001_adc_channel_init(struct iio_dev *indio_dev,
 
 static int cc10001_adc_probe(struct platform_device *pdev)
 {
-	struct device_node *node = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
 	struct cc10001_adc_device *adc_dev;
 	unsigned long adc_clk_rate;
 	struct iio_dev *indio_dev;
 	unsigned long channel_map;
 	int ret;
 
-	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc_dev));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc_dev));
 	if (indio_dev == NULL)
 		return -ENOMEM;
 
@@ -326,7 +327,7 @@ static int cc10001_adc_probe(struct platform_device *pdev)
 		channel_map &= ~ret;
 	}
 
-	adc_dev->reg = devm_regulator_get(&pdev->dev, "vref");
+	adc_dev->reg = devm_regulator_get(dev, "vref");
 	if (IS_ERR(adc_dev->reg))
 		return PTR_ERR(adc_dev->reg);
 
@@ -334,7 +335,7 @@ static int cc10001_adc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	indio_dev->name = dev_name(&pdev->dev);
+	indio_dev->name = dev_name(dev);
 	indio_dev->info = &cc10001_adc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
@@ -344,23 +345,23 @@ static int cc10001_adc_probe(struct platform_device *pdev)
 		goto err_disable_reg;
 	}
 
-	adc_dev->adc_clk = devm_clk_get(&pdev->dev, "adc");
+	adc_dev->adc_clk = devm_clk_get(dev, "adc");
 	if (IS_ERR(adc_dev->adc_clk)) {
-		dev_err(&pdev->dev, "failed to get the clock\n");
+		dev_err(dev, "failed to get the clock\n");
 		ret = PTR_ERR(adc_dev->adc_clk);
 		goto err_disable_reg;
 	}
 
 	ret = clk_prepare_enable(adc_dev->adc_clk);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to enable the clock\n");
+		dev_err(dev, "failed to enable the clock\n");
 		goto err_disable_reg;
 	}
 
 	adc_clk_rate = clk_get_rate(adc_dev->adc_clk);
 	if (!adc_clk_rate) {
 		ret = -EINVAL;
-		dev_err(&pdev->dev, "null clock rate!\n");
+		dev_err(dev, "null clock rate!\n");
 		goto err_disable_clk;
 	}