iio: adc: sun20i-gpadc: add A523 gpadc support

A523 differs from existing sun20i-gpadc-iio by having two clocks; bus
clock and module clock.

Change driver to enable all clocks.

Signed-off-by: Michal Piekos <michal.piekos@mmpsystems.pl>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Author: michalpiekos

drivers/iio/adc/sun20i-gpadc-iio.c

@@ -177,10 +177,10 @@ static int sun20i_gpadc_alloc_channels(struct iio_dev *indio_dev,
 static int sun20i_gpadc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct iio_dev *indio_dev;
 	struct sun20i_gpadc_iio *info;
+	struct clk_bulk_data *clks;
 	struct reset_control *rst;
-	struct clk *clk;
+	struct iio_dev *indio_dev;
 	int irq;
 	int ret;
 
@@ -205,9 +205,11 @@ static int sun20i_gpadc_probe(struct platform_device *pdev)
 	if (IS_ERR(info->regs))
 		return PTR_ERR(info->regs);
 
-	clk = devm_clk_get_enabled(dev, NULL);
-	if (IS_ERR(clk))
-		return dev_err_probe(dev, PTR_ERR(clk), "failed to enable bus clock\n");
+	ret = devm_clk_bulk_get_all_enabled(dev, &clks);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "failed to enable clocks\n");
+	if (ret == 0)
+		return dev_err_probe(dev, -ENODEV, "needs at least one clocks\n");
 
 	rst = devm_reset_control_get_exclusive(dev, NULL);
 	if (IS_ERR(rst))
@@ -243,6 +245,7 @@ static int sun20i_gpadc_probe(struct platform_device *pdev)
 
 static const struct of_device_id sun20i_gpadc_of_id[] = {
 	{ .compatible = "allwinner,sun20i-d1-gpadc" },
+	{ .compatible = "allwinner,sun55i-a523-gpadc" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sun20i_gpadc_of_id);