Messages in this thread Patch in this message | | | From | Julia Lawall <> | Subject | [PATCH 1/13] drivers/staging/iio/adc/spear_adc.c: use clk_prepare_enable and clk_disable_unprepare | Date | Sun, 26 Aug 2012 18:00:53 +0200 |
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From: Julia Lawall <Julia.Lawall@lip6.fr>
Clk_prepare_enable and clk_disable_unprepare combine clk_prepare and clk_enable, and clk_disable and clk_unprepare. They make the code more concise, and ensure that clk_unprepare is called when clk_enable fails.
A simplified version of the semantic patch that introduces calls to these functions is as follows: (http://coccinelle.lip6.fr/)
// <smpl> @@ expression e; @@
- clk_prepare(e); - clk_enable(e); + clk_prepare_enable(e);
@@ expression e; @@
- clk_disable(e); - clk_unprepare(e); + clk_disable_unprepare(e); // </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
--- drivers/staging/iio/adc/spear_adc.c | 25 ++++++++----------------- 1 file changed, 8 insertions(+), 17 deletions(-)
diff --git a/drivers/staging/iio/adc/spear_adc.c b/drivers/staging/iio/adc/spear_adc.c index 675c427..0b83e2e 100644 --- a/drivers/staging/iio/adc/spear_adc.c +++ b/drivers/staging/iio/adc/spear_adc.c @@ -330,36 +330,30 @@ static int __devinit spear_adc_probe(struct platform_device *pdev) goto errout3; } - ret = clk_prepare(info->clk); - if (ret) { - dev_err(dev, "failed preparing clock\n"); - goto errout4; - } - - ret = clk_enable(info->clk); + ret = clk_prepare_enable(info->clk); if (ret) { dev_err(dev, "failed enabling clock\n"); - goto errout5; + goto errout4; } irq = platform_get_irq(pdev, 0); if ((irq < 0) || (irq >= NR_IRQS)) { dev_err(dev, "failed getting interrupt resource\n"); ret = -EINVAL; - goto errout6; + goto errout5; } ret = devm_request_irq(dev, irq, spear_adc_isr, 0, MOD_NAME, info); if (ret < 0) { dev_err(dev, "failed requesting interrupt\n"); - goto errout6; + goto errout5; } if (of_property_read_u32(np, "sampling-frequency", &info->sampling_freq)) { dev_err(dev, "sampling-frequency missing in DT\n"); ret = -EINVAL; - goto errout6; + goto errout5; } /* @@ -389,16 +383,14 @@ static int __devinit spear_adc_probe(struct platform_device *pdev) ret = iio_device_register(iodev); if (ret) - goto errout6; + goto errout5; dev_info(dev, "SPEAR ADC driver loaded, IRQ %d\n", irq); return 0; -errout6: - clk_disable(info->clk); errout5: - clk_unprepare(info->clk); + clk_disable_unprepare(info->clk); errout4: clk_put(info->clk); errout3: @@ -416,8 +408,7 @@ static int __devexit spear_adc_remove(struct platform_device *pdev) iio_device_unregister(iodev); platform_set_drvdata(pdev, NULL); - clk_disable(info->clk); - clk_unprepare(info->clk); + clk_disable_unprepare(info->clk); clk_put(info->clk); iounmap(info->adc_base_spear6xx); iio_device_free(iodev);
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