use devm_clk_get() for automatic put after device close, check for and
propagate errors when enabling clocks, need to prepare clocks before
they can get enabled, adjust code paths to correctly balance get/put and
prepare/unprepare and enable/disable calls
Signed-off-by: Gerhard Sittig <gsi@xxxxxxx>
---
drivers/media/platform/fsl-viu.c | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
diff --git a/drivers/media/platform/fsl-viu.c b/drivers/media/platform/fsl-viu.c
index 221ec42..fe9898c 100644
--- a/drivers/media/platform/fsl-viu.c
+++ b/drivers/media/platform/fsl-viu.c
@@ -1485,6 +1485,7 @@ static int viu_of_probe(struct platform_device *op)
struct viu_reg __iomem *viu_regs;
struct i2c_adapter *ad;
int ret, viu_irq;
+ struct clk *clk;
ret = of_address_to_resource(op->dev.of_node, 0, &r);
if (ret) {
@@ -1577,14 +1578,18 @@ static int viu_of_probe(struct platform_device *op)
}
/* enable VIU clock */
- viu_dev->clk = clk_get(&op->dev, "viu_clk");
- if (IS_ERR(viu_dev->clk)) {
- dev_err(&op->dev, "failed to find the clock module!\n");
- ret = -ENODEV;
+ clk = devm_clk_get(&op->dev, "viu_clk");
+ if (IS_ERR(clk)) {
+ dev_err(&op->dev, "failed to lookup the clock!\n");
+ ret = PTR_ERR(clk);
+ goto err_clk;
+ }
+ ret = clk_prepare_enable(clk);
+ if (ret) {
+ dev_err(&op->dev, "failed to enable the clock!\n");
goto err_clk;
- } else {
- clk_enable(viu_dev->clk);
}
+ viu_dev->clk = clk;
/* reset VIU module */
viu_reset(viu_dev->vr);
@@ -1602,8 +1607,7 @@ static int viu_of_probe(struct platform_device *op)
return ret;
err_irq:
- clk_disable(viu_dev->clk);
- clk_put(viu_dev->clk);
+ clk_disable_unprepare(viu_dev->clk);
err_clk:
video_unregister_device(viu_dev->vdev);
err_vdev:
@@ -1626,8 +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_put(dev->clk);
+ clk_disable_unprepare(dev->clk);
video_unregister_device(dev->vdev);
i2c_put_adapter(client->adapter);
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
