[v2,21/24,media] fsl-viu: OF clock lookup, prepare before enable

Commit Message

Gerhard Sittig July 18, 2013, 8:20 p.m. UTC

device tree based clock lookup, must prepare clocks before enabling
them, unprepare after disable, error check in the clock setup

Signed-off-by: Gerhard Sittig <[e-mail]>
---
 drivers/media/platform/fsl-viu.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/media/platform/fsl-viu.c b/drivers/media/platform/fsl-viu.c
index 221ec42..b95aa43 100644
--- a/drivers/media/platform/fsl-viu.c
+++ b/drivers/media/platform/fsl-viu.c
@@ -1582,8 +1582,11 @@  static int viu_of_probe(struct platform_device *op)
 		dev_err(&op->dev, "failed to find the clock module!\n");
 		ret = -ENODEV;
 		goto err_clk;
-	} else {
-		clk_enable(viu_dev->clk);
+	}
+	ret = clk_prepare_enable(viu_dev->clk);
+	if (ret) {
+		dev_err(&op->dev, "failed to enable the clock!\n");
+		goto err_clk_put;
 	}
 
 	/* reset VIU module */
@@ -1602,7 +1605,8 @@  static int viu_of_probe(struct platform_device *op)
 	return ret;
 
 err_irq:
-	clk_disable(viu_dev->clk);
+	clk_disable_unprepare(viu_dev->clk);
+err_clk_put:
 	clk_put(viu_dev->clk);
 err_clk:
 	video_unregister_device(viu_dev->vdev);
@@ -1626,7 +1630,7 @@  static int viu_of_remove(struct platform_device *op)
 	free_irq(dev->irq, (void *)dev);
 	irq_dispose_mapping(dev->irq);
 
-	clk_disable(dev->clk);
+	clk_disable_unprepare(dev->clk);
 	clk_put(dev->clk);
 
 	video_unregister_device(dev->vdev);