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gpio: em: Make use of devm functions 

Update the Emma Mobile GPIO driver to make use of devm
functions. This simplifies the error handling and makes
the code more compact.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Magnus Damm 2013-03-13 20:06:30 +09:00 committed by Linus Walleij
parent 977d16b87a
commit 1cfe6f8cb1
1 changed files with 19 additions and 34 deletions
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53
drivers/gpio/gpio-em.c
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@ -245,7 +245,7 @@ static int em_gio_probe(struct platform_device *pdev)
const char *name = dev_name(&pdev->dev);
int ret;
p = kzalloc(sizeof(*p), GFP_KERNEL);
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (!p) {
dev_err(&pdev->dev, "failed to allocate driver data\n");
ret = -ENOMEM;
@ -264,21 +264,23 @@ static int em_gio_probe(struct platform_device *pdev)
if (!io[0] || !io[1] || !irq[0] || !irq[1]) {
dev_err(&pdev->dev, "missing IRQ or IOMEM\n");
ret = -EINVAL;
goto err1;
goto err0;
}
p->base0 = ioremap_nocache(io[0]->start, resource_size(io[0]));
p->base0 = devm_ioremap_nocache(&pdev->dev, io[0]->start,
resource_size(io[0]));
if (!p->base0) {
dev_err(&pdev->dev, "failed to remap low I/O memory\n");
ret = -ENXIO;
goto err1;
goto err0;
}
p->base1 = ioremap_nocache(io[1]->start, resource_size(io[1]));
p->base1 = devm_ioremap_nocache(&pdev->dev, io[1]->start,
resource_size(io[1]));
if (!p->base1) {
dev_err(&pdev->dev, "failed to remap high I/O memory\n");
ret = -ENXIO;
goto err2;
goto err0;
}
if (!pdata) {
@ -289,13 +291,13 @@ static int em_gio_probe(struct platform_device *pdev)
&pdata->number_of_pins)) {
dev_err(&pdev->dev, "Missing ngpios OF property\n");
ret = -EINVAL;
goto err3;
goto err0;
}
ret = of_alias_get_id(pdev->dev.of_node, "gpio");
if (ret < 0) {
dev_err(&pdev->dev, "Couldn't get OF id\n");
goto err3;
goto err0;
}
pdata->gpio_base = ret * 32; /* 32 GPIOs per instance */
}
@ -327,40 +329,32 @@ static int em_gio_probe(struct platform_device *pdev)
if (!p->irq_domain) {
ret = -ENXIO;
dev_err(&pdev->dev, "cannot initialize irq domain\n");
goto err3;
goto err0;
}
if (request_irq(irq[0]->start, em_gio_irq_handler, 0, name, p)) {
if (devm_request_irq(&pdev->dev, irq[0]->start,
em_gio_irq_handler, 0, name, p)) {
dev_err(&pdev->dev, "failed to request low IRQ\n");
ret = -ENOENT;
goto err4;
goto err1;
}
if (request_irq(irq[1]->start, em_gio_irq_handler, 0, name, p)) {
if (devm_request_irq(&pdev->dev, irq[1]->start,
em_gio_irq_handler, 0, name, p)) {
dev_err(&pdev->dev, "failed to request high IRQ\n");
ret = -ENOENT;
goto err5;
goto err1;
}
ret = gpiochip_add(gpio_chip);
if (ret) {
dev_err(&pdev->dev, "failed to add GPIO controller\n");
goto err6;
goto err1;
}
return 0;
err6:
free_irq(irq[1]->start, pdev);
err5:
free_irq(irq[0]->start, pdev);
err4:
irq_domain_remove(p->irq_domain);
err3:
iounmap(p->base1);
err2:
iounmap(p->base0);
err1:
kfree(p);
irq_domain_remove(p->irq_domain);
err0:
return ret;
}
@ -368,22 +362,13 @@ err0:
static int em_gio_remove(struct platform_device *pdev)
{
struct em_gio_priv *p = platform_get_drvdata(pdev);
struct resource *irq[2];
int ret;
ret = gpiochip_remove(&p->gpio_chip);
if (ret)
return ret;
irq[0] = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
irq[1] = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
free_irq(irq[1]->start, pdev);
free_irq(irq[0]->start, pdev);
irq_domain_remove(p->irq_domain);
iounmap(p->base1);
iounmap(p->base0);
kfree(p);
return 0;
}