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gpio-langwell: use managed functions pcim_* and devm_* 

This makes the error handling much more simpler than open-coding everything and
in addition makes the probe function smaller an tidier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: David Cohen <david.a.cohen@intel.com>
[Rebased on the platform-data set to NULL removal patch]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2013-05-22 13:20:12 +03:00 committed by Linus Walleij
parent 64c8cbc17c
commit 786e07ecb5
1 changed files with 21 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
drivers/gpio/gpio-langwell.c
View File

@ -321,55 +321,37 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
void __iomem *base;
resource_size_t start, len;
struct lnw_gpio *lnw;
u32 gpio_base;
u32 irq_base;
int retval;
int ngpio = id->driver_data;
retval = pci_enable_device(pdev);
retval = pcim_enable_device(pdev);
if (retval)
return retval;
retval = pci_request_regions(pdev, "langwell_gpio");
retval = pcim_iomap_regions(pdev, 1 << 0 | 1 << 1, pci_name(pdev));
if (retval) {
dev_err(&pdev->dev, "error requesting resources\n");
goto err_pci_req_region;
}
/* get the gpio_base from bar1 */
start = pci_resource_start(pdev, 1);
len = pci_resource_len(pdev, 1);
base = ioremap_nocache(start, len);
if (!base) {
dev_err(&pdev->dev, "error mapping bar1\n");
retval = -EFAULT;
goto err_ioremap;
dev_err(&pdev->dev, "I/O memory mapping error\n");
return retval;
}
base = pcim_iomap_table(pdev)[1];
irq_base = readl(base);
gpio_base = readl(sizeof(u32) + base);
/* release the IO mapping, since we already get the info from bar1 */
iounmap(base);
/* get the register base from bar0 */
start = pci_resource_start(pdev, 0);
len = pci_resource_len(pdev, 0);
base = devm_ioremap_nocache(&pdev->dev, start, len);
if (!base) {
dev_err(&pdev->dev, "error mapping bar0\n");
retval = -EFAULT;
goto err_ioremap;
}
pcim_iounmap_regions(pdev, 1 << 1);
lnw = devm_kzalloc(&pdev->dev, sizeof(*lnw), GFP_KERNEL);
if (!lnw) {
dev_err(&pdev->dev, "can't allocate langwell_gpio chip data\n");
retval = -ENOMEM;
goto err_ioremap;
return -ENOMEM;
}
lnw->reg_base = base;
lnw->reg_base = pcim_iomap_table(pdev)[0];
lnw->chip.label = dev_name(&pdev->dev);
lnw->chip.request = lnw_gpio_request;
lnw->chip.direction_input = lnw_gpio_direction_input;
@ -386,16 +368,14 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
lnw->domain = irq_domain_add_simple(pdev->dev.of_node, ngpio, irq_base,
&lnw_gpio_irq_ops, lnw);
if (!lnw->domain) {
retval = -ENOMEM;
goto err_ioremap;
}
if (!lnw->domain)
return -ENOMEM;
pci_set_drvdata(pdev, lnw);
retval = gpiochip_add(&lnw->chip);
if (retval) {
dev_err(&pdev->dev, "langwell gpiochip_add error %d\n", retval);
goto err_ioremap;
return retval;
}
lnw_irq_init_hw(lnw);
@ -407,12 +387,6 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
pm_runtime_allow(&pdev->dev);
return 0;
err_ioremap:
pci_release_regions(pdev);
err_pci_req_region:
pci_disable_device(pdev);
return retval;
}
static struct pci_driver lnw_gpio_driver = {
@ -430,23 +404,20 @@ static int wp_gpio_probe(struct platform_device *pdev)
struct lnw_gpio *lnw;
struct gpio_chip *gc;
struct resource *rc;
int retval = 0;
int retval;
rc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!rc)
return -EINVAL;
lnw = kzalloc(sizeof(struct lnw_gpio), GFP_KERNEL);
lnw = devm_kzalloc(&pdev->dev, sizeof(struct lnw_gpio), GFP_KERNEL);
if (!lnw) {
dev_err(&pdev->dev,
"can't allocate whitneypoint_gpio chip data\n");
return -ENOMEM;
}
lnw->reg_base = ioremap_nocache(rc->start, resource_size(rc));
if (lnw->reg_base == NULL) {
retval = -EINVAL;
goto err_kmalloc;
}
rc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
lnw->reg_base = devm_ioremap_resource(&pdev->dev, rc);
if (IS_ERR(lnw->reg_base))
return PTR_ERR(lnw->reg_base);
spin_lock_init(&lnw->lock);
gc = &lnw->chip;
gc->label = dev_name(&pdev->dev);
@ -463,15 +434,10 @@ static int wp_gpio_probe(struct platform_device *pdev)
if (retval) {
dev_err(&pdev->dev, "whitneypoint gpiochip_add error %d\n",
retval);
goto err_ioremap;
return retval;
}
platform_set_drvdata(pdev, lnw);
return 0;
err_ioremap:
iounmap(lnw->reg_base);
err_kmalloc:
kfree(lnw);
return retval;
}
static int wp_gpio_remove(struct platform_device *pdev)
@ -481,8 +447,6 @@ static int wp_gpio_remove(struct platform_device *pdev)
err = gpiochip_remove(&lnw->chip);
if (err)
dev_err(&pdev->dev, "failed to remove gpio_chip.\n");
iounmap(lnw->reg_base);
kfree(lnw);
return 0;
}