[v3,1/4] i2c: emev2: Use devm_clk_get_enabled() helpers

Commit Message

Rong Qianfeng Aug. 23, 2024, 3:51 a.m. UTC

The devm_clk_get_enabled() helpers:
    - call devm_clk_get()
    - call clk_prepare_enable() and register what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids the calls to clk_disable_unprepare().

Signed-off-by: Rong Qianfeng <[e-mail]>
---
 drivers/i2c/busses/i2c-emev2.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

Comments

Andy Shevchenko Aug. 23, 2024, 3:30 p.m. UTC | #1

On Fri, Aug 23, 2024 at 11:51:13AM +0800, Rong Qianfeng wrote:
> The devm_clk_get_enabled() helpers:
>     - call devm_clk_get()
>     - call clk_prepare_enable() and register what is needed in order to
>      call clk_disable_unprepare() when needed, as a managed resource.
> 
> This simplifies the code and avoids the calls to clk_disable_unprepare().

...

>  	ret = platform_get_irq(pdev, 0);
>  	if (ret < 0)
> -		goto err_clk;
> +		return ret;
>  	priv->irq = ret;

(1)

>  	ret = devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0,
>  				"em_i2c", priv);
>  	if (ret)
> -		goto err_clk;
> +		return ret;
>  

>  	ret = i2c_add_adapter(&priv->adap);

>  

While at it, you may move this blank line to (1) above.

>  	if (ret)
> -		goto err_clk;
> +		return ret;

Patch

diff --git a/drivers/i2c/busses/i2c-emev2.c b/drivers/i2c/busses/i2c-emev2.c
index 557409410445..20efe0b0cb85 100644
--- a/drivers/i2c/busses/i2c-emev2.c
+++ b/drivers/i2c/busses/i2c-emev2.c
@@ -373,14 +373,10 @@  static int em_i2c_probe(struct platform_device *pdev)
 
 	strscpy(priv->adap.name, "EMEV2 I2C", sizeof(priv->adap.name));
 
-	priv->sclk = devm_clk_get(&pdev->dev, "sclk");
+	priv->sclk = devm_clk_get_enabled(&pdev->dev, "sclk");
 	if (IS_ERR(priv->sclk))
 		return PTR_ERR(priv->sclk);
 
-	ret = clk_prepare_enable(priv->sclk);
-	if (ret)
-		return ret;
-
 	priv->adap.timeout = msecs_to_jiffies(100);
 	priv->adap.retries = 5;
 	priv->adap.dev.parent = &pdev->dev;
@@ -397,26 +393,22 @@  static int em_i2c_probe(struct platform_device *pdev)
 
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0)
-		goto err_clk;
+		return ret;
 	priv->irq = ret;
 	ret = devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0,
 				"em_i2c", priv);
 	if (ret)
-		goto err_clk;
+		return ret;
 
 	ret = i2c_add_adapter(&priv->adap);
 
 	if (ret)
-		goto err_clk;
+		return ret;
 
 	dev_info(&pdev->dev, "Added i2c controller %d, irq %d\n", priv->adap.nr,
 		 priv->irq);
 
 	return 0;
-
-err_clk:
-	clk_disable_unprepare(priv->sclk);
-	return ret;
 }
 
 static void em_i2c_remove(struct platform_device *dev)
@@ -424,7 +416,6 @@  static void em_i2c_remove(struct platform_device *dev)
 	struct em_i2c_device *priv = platform_get_drvdata(dev);
 
 	i2c_del_adapter(&priv->adap);
-	clk_disable_unprepare(priv->sclk);
 }
 
 static const struct of_device_id em_i2c_ids[] = {