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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 = { static int em_i2c_probe(struct platform_device *pdev) { struct em_i2c_device *priv; + struct clk *sclk; int ret; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); @@ -373,13 +373,9 @@ 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"); - if (IS_ERR(priv->sclk)) - return PTR_ERR(priv->sclk); - - ret = clk_prepare_enable(priv->sclk); - if (ret) - return ret; + sclk = devm_clk_get_enabled(&pdev->dev, "sclk"); + if (IS_ERR(sclk)) + return PTR_ERR(sclk); priv->adap.timeout = msecs_to_jiffies(100); priv->adap.retries = 5; @@ -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); 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This simplifies the code and avoids the calls to clk_disable_unprepare(). While at it, no more special handling needed here, remove the goto label "err:". Signed-off-by: Rong Qianfeng Acked-by: Paul Cercueil --- drivers/i2c/busses/i2c-jz4780.c | 22 +++++++--------------- 1 file changed, 7 insertions(+), 15 deletions(-) diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c index 4aafdfab6305..92cc5b091137 100644 --- a/drivers/i2c/busses/i2c-jz4780.c +++ b/drivers/i2c/busses/i2c-jz4780.c @@ -792,26 +792,22 @@ static int jz4780_i2c_probe(struct platform_device *pdev) platform_set_drvdata(pdev, i2c); - i2c->clk = devm_clk_get(&pdev->dev, NULL); + i2c->clk = devm_clk_get_enabled(&pdev->dev, NULL); if (IS_ERR(i2c->clk)) return PTR_ERR(i2c->clk); - ret = clk_prepare_enable(i2c->clk); - if (ret) - return ret; - ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency", &clk_freq); if (ret) { dev_err(&pdev->dev, "clock-frequency not specified in DT\n"); - goto err; + return ret; } i2c->speed = clk_freq / 1000; if (i2c->speed == 0) { ret = -EINVAL; dev_err(&pdev->dev, "clock-frequency minimum is 1000\n"); - goto err; 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While at it, use struct dev *dev to replace &pdev->dev to further simplify the code. Use the macro definition HZ_PER_KHZ to replace the 1000. Signed-off-by: Rong Qianfeng --- drivers/i2c/busses/i2c-jz4780.c | 40 ++++++++++++++++----------------- 1 file changed, 20 insertions(+), 20 deletions(-) diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c index 92cc5b091137..72823a0f39c2 100644 --- a/drivers/i2c/busses/i2c-jz4780.c +++ b/drivers/i2c/busses/i2c-jz4780.c @@ -23,6 +23,7 @@ #include #include #include +#include #define JZ4780_I2C_CTRL 0x00 #define JZ4780_I2C_TAR 0x04 @@ -764,14 +765,15 @@ static int jz4780_i2c_probe(struct platform_device *pdev) unsigned int clk_freq = 0; unsigned short tmp; struct jz4780_i2c *i2c; + struct device *dev = &pdev->dev; - i2c = devm_kzalloc(&pdev->dev, sizeof(struct jz4780_i2c), GFP_KERNEL); + i2c = devm_kzalloc(dev, sizeof(struct jz4780_i2c), GFP_KERNEL); if (!i2c) return -ENOMEM; - i2c->cdata = device_get_match_data(&pdev->dev); + i2c->cdata = device_get_match_data(dev); if (!i2c->cdata) { - dev_err(&pdev->dev, "Error: No device match found\n"); + dev_err(dev, "Error: No device match found\n"); return -ENODEV; } @@ -779,8 +781,8 @@ static int jz4780_i2c_probe(struct platform_device *pdev) i2c->adap.algo = &jz4780_i2c_algorithm; i2c->adap.algo_data = i2c; i2c->adap.retries = 5; - i2c->adap.dev.parent = &pdev->dev; - i2c->adap.dev.of_node = pdev->dev.of_node; + i2c->adap.dev.parent = dev; + i2c->adap.dev.of_node = dev->of_node; sprintf(i2c->adap.name, "%s", pdev->name); init_completion(&i2c->trans_waitq); @@ -792,26 +794,24 @@ static int jz4780_i2c_probe(struct platform_device *pdev) platform_set_drvdata(pdev, i2c); - i2c->clk = devm_clk_get_enabled(&pdev->dev, NULL); + i2c->clk = devm_clk_get_enabled(dev, NULL); if (IS_ERR(i2c->clk)) return PTR_ERR(i2c->clk); - ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency", + ret = of_property_read_u32(dev->of_node, "clock-frequency", &clk_freq); - if (ret) { - dev_err(&pdev->dev, "clock-frequency not specified in DT\n"); - return ret; - } + if (ret) + return dev_err_probe(dev, ret, + "clock-frequency not specified in DT\n"); + + i2c->speed = clk_freq / HZ_PER_KHZ; + if (i2c->speed == 0) + return dev_err_probe(dev, -EINVAL, + "clock-frequency minimum is HZ_PER_KHZ\n"); - i2c->speed = clk_freq / 1000; - if (i2c->speed == 0) { - ret = -EINVAL; - dev_err(&pdev->dev, "clock-frequency minimum is 1000\n"); - return ret; - } jz4780_i2c_set_speed(i2c); - dev_info(&pdev->dev, "Bus frequency is %d KHz\n", i2c->speed); + dev_info(dev, "Bus frequency is %d KHz\n", i2c->speed); if (i2c->cdata->version < ID_X1000) { tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); @@ -826,8 +826,8 @@ static int jz4780_i2c_probe(struct platform_device *pdev) return ret; i2c->irq = ret; - ret = devm_request_irq(&pdev->dev, i2c->irq, jz4780_i2c_irq, 0, - dev_name(&pdev->dev), i2c); + ret = devm_request_irq(dev, i2c->irq, jz4780_i2c_irq, 0, + dev_name(dev), i2c); if (ret) return ret;