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charset="utf-8" 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(). While at it, no need to save clk pointer, drop sclk from struct em_i2c_device. Signed-off-by: Rong Qianfeng Reviewed-by: Geert Uytterhoeven Reviewed-by: Wolfram Sang --- drivers/i2c/busses/i2c-emev2.c | 25 ++++++++----------------- 1 file changed, 8 insertions(+), 17 deletions(-) diff --git a/drivers/i2c/busses/i2c-emev2.c b/drivers/i2c/busses/i2c-emev2.c index 557409410445..d08be3f3cede 100644 --- a/drivers/i2c/busses/i2c-emev2.c +++ b/drivers/i2c/busses/i2c-emev2.c @@ -67,7 +67,6 @@ struct em_i2c_device { void __iomem *base; struct i2c_adapter adap; struct completion msg_done; - struct clk *sclk; struct i2c_client *slave; int irq; }; @@ -361,6 +360,7 @@ static const struct i2c_algorithm em_i2c_algo =3D { static int em_i2c_probe(struct platform_device *pdev) { struct em_i2c_device *priv; + struct clk *sclk; int ret; =20 priv =3D devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); @@ -373,13 +373,9 @@ static int em_i2c_probe(struct platform_device *pdev) =20 strscpy(priv->adap.name, "EMEV2 I2C", sizeof(priv->adap.name)); =20 - priv->sclk =3D devm_clk_get(&pdev->dev, "sclk"); - if (IS_ERR(priv->sclk)) - return PTR_ERR(priv->sclk); - - ret =3D clk_prepare_enable(priv->sclk); - if (ret) - return ret; + sclk =3D devm_clk_get_enabled(&pdev->dev, "sclk"); + if (IS_ERR(sclk)) + return PTR_ERR(sclk); =20 priv->adap.timeout =3D msecs_to_jiffies(100); priv->adap.retries =3D 5; @@ -397,26 +393,22 @@ static int em_i2c_probe(struct platform_device *pdev) =20 ret =3D platform_get_irq(pdev, 0); if (ret < 0) - goto err_clk; + return ret; priv->irq =3D ret; + ret =3D devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0, "em_i2c", priv); if (ret) - goto err_clk; + return ret; =20 ret =3D i2c_add_adapter(&priv->adap); - if (ret) - goto err_clk; + return ret; =20 dev_info(&pdev->dev, "Added i2c controller %d, irq %d\n", priv->adap.nr, priv->irq); =20 return 0; - -err_clk: - clk_disable_unprepare(priv->sclk); - return ret; } =20 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 =3D platform_get_drvdata(dev); =20 i2c_del_adapter(&priv->adap); - clk_disable_unprepare(priv->sclk); } =20 static const struct of_device_id em_i2c_ids[] =3D { --=20 2.39.0