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author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2013-05-22 13:20:12 +0300 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2013-05-30 19:31:01 +0200 |
commit | 786e07ecb5b2ef896c9d42fa982d02da168e4290 (patch) | |
tree | 6b26542dd9986bb252e8811a84a371e3b0ecd33e | |
parent | 64c8cbc17c8d4af3b600c66247e47eac99e46aaf (diff) | |
download | linux-stable-786e07ecb5b2ef896c9d42fa982d02da168e4290.tar.gz linux-stable-786e07ecb5b2ef896c9d42fa982d02da168e4290.tar.bz2 linux-stable-786e07ecb5b2ef896c9d42fa982d02da168e4290.zip |
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>
-rw-r--r-- | drivers/gpio/gpio-langwell.c | 78 |
1 files changed, 21 insertions, 57 deletions
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c index fff661126dc7..54b6caf1742e 100644 --- a/drivers/gpio/gpio-langwell.c +++ b/drivers/gpio/gpio-langwell.c @@ -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; - - rc = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!rc) - return -EINVAL; + int retval; - 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; } |