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gpio: timberdale: use devm functions

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This eases memory allocation and provides appropriate logging.

Signed-off-by: abdoulaye berthe <berthe.ab@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
abdoulaye berthe 2014-05-13 03:21:42 +02:00 committed by Linus Walleij
parent a435e1802b
commit 0ed3398ed8
1 changed files with 16 additions and 31 deletions
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47
drivers/gpio/gpio-timberdale.c
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@ -224,6 +224,7 @@ static struct irq_chip timbgpio_irqchip = {
static int timbgpio_probe(struct platform_device *pdev)
{
int err, i;
struct device *dev = &pdev->dev;
struct gpio_chip *gc;
struct timbgpio *tgpio;
struct resource *iomem;
@ -231,35 +232,35 @@ static int timbgpio_probe(struct platform_device *pdev)
int irq = platform_get_irq(pdev, 0);
if (!pdata || pdata->nr_pins > 32) {
err = -EINVAL;
goto err_mem;
dev_err(dev, "Invalid platform data\n");
return -EINVAL;
}
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iomem) {
err = -EINVAL;
goto err_mem;
dev_err(dev, "Unable to get resource\n");
return -EINVAL;
}
tgpio = kzalloc(sizeof(*tgpio), GFP_KERNEL);
tgpio = devm_kzalloc(dev, sizeof(struct timbgpio), GFP_KERNEL);
if (!tgpio) {
err = -EINVAL;
goto err_mem;
dev_err(dev, "Memory alloc failed\n");
return -EINVAL;
}
tgpio->irq_base = pdata->irq_base;
spin_lock_init(&tgpio->lock);
if (!request_mem_region(iomem->start, resource_size(iomem),
DRIVER_NAME)) {
err = -EBUSY;
goto err_request;
if (!devm_request_mem_region(dev, iomem->start, resource_size(iomem),
DRIVER_NAME)) {
dev_err(dev, "Region already claimed\n");
return -EBUSY;
}
tgpio->membase = ioremap(iomem->start, resource_size(iomem));
tgpio->membase = devm_ioremap(dev, iomem->start, resource_size(iomem));
if (!tgpio->membase) {
err = -ENOMEM;
goto err_ioremap;
dev_err(dev, "Cannot ioremap\n");
return -ENOMEM;
}
gc = &tgpio->gpio;
@ -279,7 +280,7 @@ static int timbgpio_probe(struct platform_device *pdev)
err = gpiochip_add(gc);
if (err)
goto err_chipadd;
return err;
platform_set_drvdata(pdev, tgpio);
@ -302,17 +303,6 @@ static int timbgpio_probe(struct platform_device *pdev)
irq_set_chained_handler(irq, timbgpio_irq);
return 0;
err_chipadd:
iounmap(tgpio->membase);
err_ioremap:
release_mem_region(iomem->start, resource_size(iomem));
err_request:
kfree(tgpio);
err_mem:
printk(KERN_ERR DRIVER_NAME": Failed to register GPIOs: %d\n", err);
return err;
}
static int timbgpio_remove(struct platform_device *pdev)
@ -320,7 +310,6 @@ static int timbgpio_remove(struct platform_device *pdev)
int err;
struct timbgpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct timbgpio *tgpio = platform_get_drvdata(pdev);
struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
int irq = platform_get_irq(pdev, 0);
if (irq >= 0 && tgpio->irq_base > 0) {
@ -338,10 +327,6 @@ static int timbgpio_remove(struct platform_device *pdev)
if (err)
printk(KERN_ERR DRIVER_NAME": failed to remove gpio_chip\n");
iounmap(tgpio->membase);
release_mem_region(iomem->start, resource_size(iomem));
kfree(tgpio);
return 0;
}