1. remove module support.

2. add a mask handler to irqchip.
Signed-off-by: Alek Du <alek.du@intel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/gpio/Kconfig

@@ -191,7 +191,7 @@ config GPIO_BT8XX
 	  If unsure, say N.
 
 config GPIO_LANGWELL
-	tristate "Intel Moorestown Platform Langwell GPIO support"
+	bool "Intel Moorestown Platform Langwell GPIO support"
 	depends on PCI
 	help
 	  Say Y here to support Intel Moorestown platform GPIO.

drivers/gpio/langwell_gpio.c

@@ -152,8 +152,13 @@ static void lnw_irq_unmask(unsigned irq)
 	writel(BIT(gpio % 32), gedr);
 };
 
+static void lnw_irq_mask(unsigned irq)
+{
+};
+
 static struct irq_chip lnw_irqchip = {
 	.name		= "LNW-GPIO",
+	.mask		= lnw_irq_mask,
 	.unmask		= lnw_irq_unmask,
 	.set_type	= lnw_irq_type,
 };
@@ -277,27 +282,10 @@ done:
 	return retval;
 }
 
-static void __devexit lnw_gpio_remove(struct pci_dev *pdev)
-{
-	struct lnw_gpio *lnw = (struct lnw_gpio *)pci_get_drvdata(pdev);
-
-	if (gpiochip_remove(&lnw->chip)) {
-		dev_err(&pdev->dev, "langwell gpio driver remove error\n");
-		return;
-	}
-	pci_disable_device(pdev);
-	set_irq_chained_handler(pdev->irq, NULL);
-	pci_release_regions(pdev);
-	iounmap(lnw->reg_base);
-	pci_set_drvdata(pdev, NULL);
-	kfree(lnw);
-}
-
 static struct pci_driver lnw_gpio_driver = {
 	.name		= "langwell_gpio",
 	.id_table	= lnw_gpio_ids,
 	.probe		= lnw_gpio_probe,
-	.remove		= lnw_gpio_remove,
 };
 
 static int __init lnw_gpio_init(void)
@@ -305,14 +293,4 @@ static int __init lnw_gpio_init(void)
 	return pci_register_driver(&lnw_gpio_driver);
 }
 
-static void __exit lnw_gpio_exit(void)
-{
-	pci_unregister_driver(&lnw_gpio_driver);
-}
-
-MODULE_AUTHOR("Alek Du <alek.du@intel.com>");
-MODULE_DESCRIPTION("Intel Moorestown Platform Langwell chip GPIO driver");
-MODULE_LICENSE("GPL v2");
-
-module_init(lnw_gpio_init);
-module_exit(lnw_gpio_exit);
+device_initcall(lnw_gpio_init);