ASoC: dwc: Prepare clock before use

Some I2S clocks may require some time to get the clock ready
for operation and so need to be prepared before they are enabled.
So, prepare the clock as well as enabling it, but combine the
two through clk_prepare_enable.
Signed-off-by: NAndrew Jackson <Andrew.Jackson@arm.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/dwc/designware_i2s.c

@@ -476,7 +476,7 @@ static int dw_i2s_probe(struct platform_device *pdev)
 	if (IS_ERR(dev->clk))
 		return  PTR_ERR(dev->clk);
 
-	ret = clk_enable(dev->clk);
+	ret = clk_prepare_enable(dev->clk);
 	if (ret < 0)
 		return ret;
 
@@ -491,13 +491,16 @@ static int dw_i2s_probe(struct platform_device *pdev)
 	return 0;
 
 err_clk_disable:
-	clk_disable(dev->clk);
+	clk_disable_unprepare(dev->clk);
 	return ret;
 }
 
 static int dw_i2s_remove(struct platform_device *pdev)
 {
+	struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
+
 	snd_soc_unregister_component(&pdev->dev);
+	clk_disable_unprepare(dev->clk);
 
 	return 0;
 }