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ARM: SAMSUNG: use devm_ functions for ADC driver

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This patch uses devm_* functions for probe function in ADC driver.
It reduces code size and simplifies the code.

Signed-off-by: Eunki Kim <eunki_kim@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Eunki Kim 2012-11-20 20:50:54 +09:00 committed by Kukjin Kim
parent 559a67dba2
commit 2ee8e6f0e3
1 changed files with 13 additions and 35 deletions
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48
arch/arm/plat-samsung/adc.c
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@ -344,7 +344,7 @@ static int s3c_adc_probe(struct platform_device *pdev)
int ret;
unsigned tmp;
adc = kzalloc(sizeof(struct adc_device), GFP_KERNEL);
adc = devm_kzalloc(dev, sizeof(struct adc_device), GFP_KERNEL);
if (adc == NULL) {
dev_err(dev, "failed to allocate adc_device\n");
return -ENOMEM;
@ -355,50 +355,46 @@ static int s3c_adc_probe(struct platform_device *pdev)
adc->pdev = pdev;
adc->prescale = S3C2410_ADCCON_PRSCVL(49);
adc->vdd = regulator_get(dev, "vdd");
adc->vdd = devm_regulator_get(dev, "vdd");
if (IS_ERR(adc->vdd)) {
dev_err(dev, "operating without regulator \"vdd\" .\n");
ret = PTR_ERR(adc->vdd);
goto err_alloc;
return PTR_ERR(adc->vdd);
}
adc->irq = platform_get_irq(pdev, 1);
if (adc->irq <= 0) {
dev_err(dev, "failed to get adc irq\n");
ret = -ENOENT;
goto err_reg;
return -ENOENT;
}
ret = request_irq(adc->irq, s3c_adc_irq, 0, dev_name(dev), adc);
ret = devm_request_irq(dev, adc->irq, s3c_adc_irq, 0, dev_name(dev),
adc);
if (ret < 0) {
dev_err(dev, "failed to attach adc irq\n");
goto err_reg;
return ret;
}
adc->clk = clk_get(dev, "adc");
adc->clk = devm_clk_get(dev, "adc");
if (IS_ERR(adc->clk)) {
dev_err(dev, "failed to get adc clock\n");
ret = PTR_ERR(adc->clk);
goto err_irq;
return PTR_ERR(adc->clk);
}
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs) {
dev_err(dev, "failed to find registers\n");
ret = -ENXIO;
goto err_clk;
return -ENXIO;
}
adc->regs = ioremap(regs->start, resource_size(regs));
adc->regs = devm_request_and_ioremap(dev, regs);
if (!adc->regs) {
dev_err(dev, "failed to map registers\n");
ret = -ENXIO;
goto err_clk;
return -ENXIO;
}
ret = regulator_enable(adc->vdd);
if (ret)
goto err_ioremap;
return ret;
clk_enable(adc->clk);
@ -418,32 +414,14 @@ static int s3c_adc_probe(struct platform_device *pdev)
adc_dev = adc;
return 0;
err_ioremap:
iounmap(adc->regs);
err_clk:
clk_put(adc->clk);
err_irq:
free_irq(adc->irq, adc);
err_reg:
regulator_put(adc->vdd);
err_alloc:
kfree(adc);
return ret;
}
static int __devexit s3c_adc_remove(struct platform_device *pdev)
{
struct adc_device *adc = platform_get_drvdata(pdev);
iounmap(adc->regs);
free_irq(adc->irq, adc);
clk_disable(adc->clk);
regulator_disable(adc->vdd);
regulator_put(adc->vdd);
clk_put(adc->clk);
kfree(adc);
return 0;
}