langwell_gpio: add support for whitney point
In this case the logic is very similar but the IRQs are not exposed and the device is not picked up via PCI Based on a separate internal whitney point driver by Yin Kangkai. Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: Yin Kangkai <kangkai.yin@intel.com> Cc: Alek Du <alek.du@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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parent
fd0574cb54
commit
72b4379e95
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@ -18,10 +18,12 @@
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/* Supports:
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* Moorestown platform Langwell chip.
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* Medfield platform Penwell chip.
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* Whitney point.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/stddef.h>
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@ -300,9 +302,88 @@ static struct pci_driver lnw_gpio_driver = {
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.probe = lnw_gpio_probe,
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};
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static int __devinit wp_gpio_probe(struct platform_device *pdev)
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{
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struct lnw_gpio *lnw;
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struct gpio_chip *gc;
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struct resource *rc;
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int retval = 0;
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rc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!rc)
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return -EINVAL;
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lnw = kzalloc(sizeof(struct lnw_gpio), GFP_KERNEL);
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if (!lnw) {
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dev_err(&pdev->dev,
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"can't allocate whitneypoint_gpio chip data\n");
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return -ENOMEM;
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}
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lnw->reg_base = ioremap_nocache(rc->start, resource_size(rc));
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if (lnw->reg_base == NULL) {
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retval = -EINVAL;
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goto err_kmalloc;
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}
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spin_lock_init(&lnw->lock);
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gc = &lnw->chip;
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gc->label = dev_name(&pdev->dev);
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gc->owner = THIS_MODULE;
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gc->direction_input = lnw_gpio_direction_input;
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gc->direction_output = lnw_gpio_direction_output;
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gc->get = lnw_gpio_get;
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gc->set = lnw_gpio_set;
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gc->to_irq = NULL;
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gc->base = 0;
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gc->ngpio = 64;
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gc->can_sleep = 0;
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retval = gpiochip_add(gc);
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if (retval) {
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dev_err(&pdev->dev, "whitneypoint gpiochip_add error %d\n",
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retval);
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goto err_ioremap;
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}
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platform_set_drvdata(pdev, lnw);
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return 0;
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err_ioremap:
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iounmap(lnw->reg_base);
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err_kmalloc:
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kfree(lnw);
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return retval;
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}
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static int __devexit wp_gpio_remove(struct platform_device *pdev)
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{
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struct lnw_gpio *lnw = platform_get_drvdata(pdev);
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int err;
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err = gpiochip_remove(&lnw->chip);
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if (err)
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dev_err(&pdev->dev, "failed to remove gpio_chip.\n");
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iounmap(lnw->reg_base);
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kfree(lnw);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static struct platform_driver wp_gpio_driver = {
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.probe = wp_gpio_probe,
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.remove = __devexit_p(wp_gpio_remove),
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.driver = {
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.name = "wp_gpio",
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.owner = THIS_MODULE,
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},
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};
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static int __init lnw_gpio_init(void)
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{
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return pci_register_driver(&lnw_gpio_driver);
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int ret;
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ret = pci_register_driver(&lnw_gpio_driver);
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if (ret < 0)
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return ret;
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ret = platform_driver_register(&wp_gpio_driver);
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if (ret < 0)
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pci_unregister_driver(&lnw_gpio_driver);
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return ret;
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}
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device_initcall(lnw_gpio_init);
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