24 files changed, 1042 insertions, 429 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index eb80ba30045..aa3642cb820 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -2,6 +2,14 @@
 # GPIO infrastructure and drivers
 #
 
+config ARCH_HAVE_CUSTOM_GPIO_H
+	bool
+	help
+	  Selecting this config option from the architecture Kconfig allows
+	  the architecture to provide a custom asm/gpio.h implementation
+	  overriding the default implementations.  New uses of this are
+	  strongly discouraged.
+
 config ARCH_WANT_OPTIONAL_GPIOLIB
 	bool
 	help
@@ -37,6 +45,10 @@ menuconfig GPIOLIB
 
 if GPIOLIB
 
+config OF_GPIO
+	def_bool y
+	depends on OF && !SPARC
+
 config DEBUG_GPIO
 	bool "Debug GPIO calls"
 	depends on DEBUG_KERNEL
@@ -249,7 +261,7 @@ config GPIO_MC9S08DZ60
 	  Select this to enable the MC9S08DZ60 GPIO driver
 
 config GPIO_PCA953X
-	tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
+	tristate "PCA953x, PCA955x, PCA957x, TCA64xx, and MAX7310 I/O ports"
 	depends on I2C
 	help
 	  Say yes here to provide access to several register-oriented
@@ -258,10 +270,11 @@ config GPIO_PCA953X
 
 	  4 bits:	pca9536, pca9537
 
-	  8 bits:	max7310, pca9534, pca9538, pca9554, pca9557,
-	  		tca6408
+	  8 bits:	max7310, max7315, pca6107, pca9534, pca9538, pca9554,
+			pca9556, pca9557, pca9574, tca6408
 
-	  16 bits:	pca9535, pca9539, pca9555, tca6416
+	  16 bits:	max7312, max7313, pca9535, pca9539, pca9555, pca9575,
+			tca6416
 
 config GPIO_PCA953X_IRQ
 	bool "Interrupt controller support for PCA953x"
@@ -294,6 +307,15 @@ config GPIO_PCF857X
 	  This driver provides an in-kernel interface to those GPIOs using
 	  platform-neutral GPIO calls.
 
+config GPIO_RC5T583
+	bool "RICOH RC5T583 GPIO"
+	depends on MFD_RC5T583
+	help
+	  Select this option to enable GPIO driver for the Ricoh RC5T583
+	  chip family.
+	  This driver provides the support for driving/reading the gpio pins
+	  of RC5T583 device through standard gpio library.
+
 config GPIO_SX150X
 	bool "Semtech SX150x I2C GPIO expander"
 	depends on I2C=y
@@ -405,6 +427,7 @@ config GPIO_BT8XX
 config GPIO_LANGWELL
 	bool "Intel Langwell/Penwell GPIO support"
 	depends on PCI && X86
+	select IRQ_DOMAIN
 	help
 	  Say Y here to support Intel Langwell/Penwell GPIO.
 
@@ -520,4 +543,12 @@ config GPIO_TPS65910
 	help
 	  Select this option to enable GPIO driver for the TPS65910
 	  chip family.
+
+config GPIO_MSIC
+	bool "Intel MSIC mixed signal gpio support"
+	depends on MFD_INTEL_MSIC
+	help
+	  Enable support for GPIO on intel MSIC controllers found in
+	  intel MID devices
+
 endif
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 708ffb2165e..07a79e24540 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -3,6 +3,7 @@
 ccflags-$(CONFIG_DEBUG_GPIO)	+= -DDEBUG
 
 obj-$(CONFIG_GPIOLIB)		+= gpiolib.o devres.o
+obj-$(CONFIG_OF_GPIO)		+= gpiolib-of.o
 
 # Device drivers. Generally keep list sorted alphabetically
 obj-$(CONFIG_GPIO_GENERIC)	+= gpio-generic.o
@@ -33,6 +34,7 @@ obj-$(CONFIG_GPIO_MCP23S08)	+= gpio-mcp23s08.o
 obj-$(CONFIG_GPIO_ML_IOH)	+= gpio-ml-ioh.o
 obj-$(CONFIG_GPIO_MPC5200)	+= gpio-mpc5200.o
 obj-$(CONFIG_GPIO_MPC8XXX)	+= gpio-mpc8xxx.o
+obj-$(CONFIG_GPIO_MSIC)		+= gpio-msic.o
 obj-$(CONFIG_GPIO_MSM_V1)	+= gpio-msm-v1.o
 obj-$(CONFIG_GPIO_MSM_V2)	+= gpio-msm-v2.o
 obj-$(CONFIG_GPIO_MXC)		+= gpio-mxc.o
@@ -43,6 +45,7 @@ obj-$(CONFIG_GPIO_PCF857X)	+= gpio-pcf857x.o
 obj-$(CONFIG_GPIO_PCH)		+= gpio-pch.o
 obj-$(CONFIG_GPIO_PL061)	+= gpio-pl061.o
 obj-$(CONFIG_GPIO_PXA)		+= gpio-pxa.o
+obj-$(CONFIG_GPIO_RC5T583)	+= gpio-rc5t583.o
 obj-$(CONFIG_GPIO_RDC321X)	+= gpio-rdc321x.o
 obj-$(CONFIG_PLAT_SAMSUNG)	+= gpio-samsung.o
 obj-$(CONFIG_ARCH_SA1100)	+= gpio-sa1100.o
diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c
index 8950f6261bb..9e9947cb86a 100644
--- a/drivers/gpio/devres.c
+++ b/drivers/gpio/devres.c
@@ -71,6 +71,35 @@ int devm_gpio_request(struct device *dev, unsigned gpio, const char *label)
 EXPORT_SYMBOL(devm_gpio_request);
 
 /**
+ *	devm_gpio_request_one - request a single GPIO with initial setup
+ *	@dev:   device to request for
+ *	@gpio:	the GPIO number
+ *	@flags:	GPIO configuration as specified by GPIOF_*
+ *	@label:	a literal description string of this GPIO
+ */
+int devm_gpio_request_one(struct device *dev, unsigned gpio,
+			  unsigned long flags, const char *label)
+{
+	unsigned *dr;
+	int rc;
+
+	dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL);
+	if (!dr)
+		return -ENOMEM;
+
+	rc = gpio_request_one(gpio, flags, label);
+	if (rc) {
+		devres_free(dr);
+		return rc;
+	}
+
+	*dr = gpio;
+	devres_add(dev, dr);
+
+	return 0;
+}
+
+/**
  *      devm_gpio_free - free an interrupt
  *      @dev: device to free gpio for
  *      @gpio: gpio to free
diff --git a/drivers/gpio/gpio-bt8xx.c b/drivers/gpio/gpio-bt8xx.c
index 5ca4098ba09..e4cc7eb69bb 100644
--- a/drivers/gpio/gpio-bt8xx.c
+++ b/drivers/gpio/gpio-bt8xx.c
@@ -328,17 +328,7 @@ static struct pci_driver bt8xxgpio_pci_driver = {
 	.resume		= bt8xxgpio_resume,
 };
 
-static int __init bt8xxgpio_init(void)
-{
-	return pci_register_driver(&bt8xxgpio_pci_driver);
-}
-module_init(bt8xxgpio_init)
-
-static void __exit bt8xxgpio_exit(void)
-{
-	pci_unregister_driver(&bt8xxgpio_pci_driver);
-}
-module_exit(bt8xxgpio_exit)
+module_pci_driver(bt8xxgpio_pci_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Michael Buesch");
diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index 776b772523e..9fe5b8fe9be 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -325,7 +325,7 @@ static int ep93xx_gpio_add_bank(struct bgpio_chip *bgc, struct device *dev,
 	void __iomem *dir =  mmio_base + bank->dir;
 	int err;
 
-	err = bgpio_init(bgc, dev, 1, data, NULL, NULL, dir, NULL, false);
+	err = bgpio_init(bgc, dev, 1, data, NULL, NULL, dir, NULL, 0);
 	if (err)
 		return err;
 
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index e38dd0c3197..82e2e4fe599 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -364,7 +364,7 @@ EXPORT_SYMBOL_GPL(bgpio_remove);
 int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
 	       unsigned long sz, void __iomem *dat, void __iomem *set,
 	       void __iomem *clr, void __iomem *dirout, void __iomem *dirin,
-	       bool big_endian)
+	       unsigned long flags)
 {
 	int ret;
 
@@ -385,7 +385,7 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
 	if (ret)
 		return ret;
 
-	ret = bgpio_setup_accessors(dev, bgc, big_endian);
+	ret = bgpio_setup_accessors(dev, bgc, flags & BGPIOF_BIG_ENDIAN);
 	if (ret)
 		return ret;
 
@@ -394,6 +394,11 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
 		return ret;
 
 	bgc->data = bgc->read_reg(bgc->reg_dat);
+	if (bgc->gc.set == bgpio_set_set &&
+			!(flags & BGPIOF_UNREADABLE_REG_SET))
+		bgc->data = bgc->read_reg(bgc->reg_set);
+	if (bgc->reg_dir && !(flags & BGPIOF_UNREADABLE_REG_DIR))
+		bgc->dir = bgc->read_reg(bgc->reg_dir);
 
 	return ret;
 }
@@ -449,7 +454,7 @@ static int __devinit bgpio_pdev_probe(struct platform_device *pdev)
 	void __iomem *dirout;
 	void __iomem *dirin;
 	unsigned long sz;
-	bool be;
+	unsigned long flags = 0;
 	int err;
 	struct bgpio_chip *bgc;
 	struct bgpio_pdata *pdata = dev_get_platdata(dev);
@@ -480,13 +485,14 @@ static int __devinit bgpio_pdev_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	be = !strcmp(platform_get_device_id(pdev)->name, "basic-mmio-gpio-be");
+	if (!strcmp(platform_get_device_id(pdev)->name, "basic-mmio-gpio-be"))
+		flags |= BGPIOF_BIG_ENDIAN;
 
 	bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
 	if (!bgc)
 		return -ENOMEM;
 
-	err = bgpio_init(bgc, dev, sz, dat, set, clr, dirout, dirin, be);
+	err = bgpio_init(bgc, dev, sz, dat, set, clr, dirout, dirin, flags);
 	if (err)
 		return err;
 
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index 00692e89ef8..a1c8754f52c 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -36,6 +36,7 @@
 #include <linux/gpio.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>
+#include <linux/irqdomain.h>
 
 /*
  * Langwell chip has 64 pins and thus there are 2 32bit registers to control
@@ -66,8 +67,8 @@ struct lnw_gpio {
 	struct gpio_chip		chip;
 	void				*reg_base;
 	spinlock_t			lock;
-	unsigned			irq_base;
 	struct pci_dev			*pdev;
+	struct irq_domain		*domain;
 };
 
 static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
@@ -176,13 +177,13 @@ static int lnw_gpio_direction_output(struct gpio_chip *chip,
 static int lnw_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 {
 	struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
-	return lnw->irq_base + offset;
+	return irq_create_mapping(lnw->domain, offset);
 }
 
 static int lnw_irq_type(struct irq_data *d, unsigned type)
 {
 	struct lnw_gpio *lnw = irq_data_get_irq_chip_data(d);
-	u32 gpio = d->irq - lnw->irq_base;
+	u32 gpio = irqd_to_hwirq(d);
 	unsigned long flags;
 	u32 value;
 	void __iomem *grer = gpio_reg(&lnw->chip, gpio, GRER);
@@ -249,20 +250,55 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc)
 	/* check GPIO controller to check which pin triggered the interrupt */
 	for (base = 0; base < lnw->chip.ngpio; base += 32) {
 		gedr = gpio_reg(&lnw->chip, base, GEDR);
-		pending = readl(gedr);
-		while (pending) {
+		while ((pending = readl(gedr))) {
 			gpio = __ffs(pending);
 			mask = BIT(gpio);
-			pending &= ~mask;
 			/* Clear before handling so we can't lose an edge */
 			writel(mask, gedr);
-			generic_handle_irq(lnw->irq_base + base + gpio);
+			generic_handle_irq(irq_find_mapping(lnw->domain,
+							    base + gpio));
 		}
 	}
 
 	chip->irq_eoi(data);
 }
 
+static void lnw_irq_init_hw(struct lnw_gpio *lnw)
+{
+	void __iomem *reg;
+	unsigned base;
+
+	for (base = 0; base < lnw->chip.ngpio; base += 32) {
+		/* Clear the rising-edge detect register */
+		reg = gpio_reg(&lnw->chip, base, GRER);
+		writel(0, reg);
+		/* Clear the falling-edge detect register */
+		reg = gpio_reg(&lnw->chip, base, GFER);
+		writel(0, reg);
+		/* Clear the edge detect status register */
+		reg = gpio_reg(&lnw->chip, base, GEDR);
+		writel(~0, reg);
+	}
+}
+
+static int lnw_gpio_irq_map(struct irq_domain *d, unsigned int virq,
+			    irq_hw_number_t hw)
+{
+	struct lnw_gpio *lnw = d->host_data;
+
+	irq_set_chip_and_handler_name(virq, &lnw_irqchip, handle_simple_irq,
+				      "demux");
+	irq_set_chip_data(virq, lnw);
+	irq_set_irq_type(virq, IRQ_TYPE_NONE);
+
+	return 0;
+}
+
+static const struct irq_domain_ops lnw_gpio_irq_ops = {
+	.map = lnw_gpio_irq_map,
+	.xlate = irq_domain_xlate_twocell,
+};
+
 #ifdef CONFIG_PM
 static int lnw_gpio_runtime_resume(struct device *dev)
 {
@@ -300,23 +336,22 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
 			const struct pci_device_id *id)
 {
 	void *base;
-	int i;
 	resource_size_t start, len;
 	struct lnw_gpio *lnw;
-	u32 irq_base;
 	u32 gpio_base;
 	int retval = 0;
+	int ngpio = id->driver_data;
 
 	retval = pci_enable_device(pdev);
 	if (retval)
-		goto done;
+		return retval;
 
 	retval = pci_request_regions(pdev, "langwell_gpio");
 	if (retval) {
 		dev_err(&pdev->dev, "error requesting resources\n");
 		goto err2;
 	}
-	/* get the irq_base from bar1 */
+	/* get the gpio_base from bar1 */
 	start = pci_resource_start(pdev, 1);
 	len = pci_resource_len(pdev, 1);
 	base = ioremap_nocache(start, len);
@@ -324,28 +359,32 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
 		dev_err(&pdev->dev, "error mapping bar1\n");
 		goto err3;
 	}
-	irq_base = *(u32 *)base;
 	gpio_base = *((u32 *)base + 1);
 	/* 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 = ioremap_nocache(start, len);
+	base = devm_ioremap_nocache(&pdev->dev, start, len);
 	if (!base) {
 		dev_err(&pdev->dev, "error mapping bar0\n");
 		retval = -EFAULT;
 		goto err3;
 	}
 
-	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 langwell_gpio chip data\n");
 		retval = -ENOMEM;
-		goto err4;
+		goto err3;
 	}
+
+	lnw->domain = irq_domain_add_linear(pdev->dev.of_node, ngpio,
+					    &lnw_gpio_irq_ops, lnw);
+	if (!lnw->domain)
+		goto err3;
+
 	lnw->reg_base = base;
-	lnw->irq_base = irq_base;
 	lnw->chip.label = dev_name(&pdev->dev);
 	lnw->chip.request = lnw_gpio_request;
 	lnw->chip.direction_input = lnw_gpio_direction_input;
@@ -354,38 +393,32 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
 	lnw->chip.set = lnw_gpio_set;
 	lnw->chip.to_irq = lnw_gpio_to_irq;
 	lnw->chip.base = gpio_base;
-	lnw->chip.ngpio = id->driver_data;
+	lnw->chip.ngpio = ngpio;
 	lnw->chip.can_sleep = 0;
 	lnw->pdev = pdev;
 	pci_set_drvdata(pdev, lnw);
 	retval = gpiochip_add(&lnw->chip);
 	if (retval) {
 		dev_err(&pdev->dev, "langwell gpiochip_add error %d\n", retval);
-		goto err5;
+		goto err3;
 	}
+
+	lnw_irq_init_hw(lnw);
+
 	irq_set_handler_data(pdev->irq, lnw);
 	irq_set_chained_handler(pdev->irq, lnw_irq_handler);
-	for (i = 0; i < lnw->chip.ngpio; i++) {
-		irq_set_chip_and_handler_name(i + lnw->irq_base, &lnw_irqchip,
-					      handle_simple_irq, "demux");
-		irq_set_chip_data(i + lnw->irq_base, lnw);
-	}
 
 	spin_lock_init(&lnw->lock);
 
 	pm_runtime_put_noidle(&pdev->dev);
 	pm_runtime_allow(&pdev->dev);
 
-	goto done;
-err5:
-	kfree(lnw);
-err4:
-	iounmap(base);
+	return 0;
+
 err3:
 	pci_release_regions(pdev);
 err2:
 	pci_disable_device(pdev);
-done:
 	return retval;
 }
 
diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c
index 61c2d08d37b..c2199beca98 100644
--- a/drivers/gpio/gpio-lpc32xx.c
+++ b/drivers/gpio/gpio-lpc32xx.c
@@ -21,6 +21,9 @@
 #include <linux/io.h>
 #include <linux/errno.h>
 #include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
 
 #include <mach/hardware.h>
 #include <mach/platform.h>
@@ -454,10 +457,57 @@ static struct lpc32xx_gpio_chip lpc32xx_gpiochip[] = {
 	},
 };
 
+/* Empty now, can be removed later when mach-lpc32xx is finally switched over
+ * to DT support
+ */
 void __init lpc32xx_gpio_init(void)
 {
+}
+
+static int lpc32xx_of_xlate(struct gpio_chip *gc,
+			    const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	/* Is this the correct bank? */
+	u32 bank = gpiospec->args[0];
+	if ((bank > ARRAY_SIZE(lpc32xx_gpiochip) ||
+	    (gc != &lpc32xx_gpiochip[bank].chip)))
+		return -EINVAL;
+
+	if (flags)
+		*flags = gpiospec->args[2];
+	return gpiospec->args[1];
+}
+
+static int __devinit lpc32xx_gpio_probe(struct platform_device *pdev)
+{
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(lpc32xx_gpiochip); i++)
+	for (i = 0; i < ARRAY_SIZE(lpc32xx_gpiochip); i++) {
+		if (pdev->dev.of_node) {
+			lpc32xx_gpiochip[i].chip.of_xlate = lpc32xx_of_xlate;
+			lpc32xx_gpiochip[i].chip.of_gpio_n_cells = 3;
+			lpc32xx_gpiochip[i].chip.of_node = pdev->dev.of_node;
+		}
 		gpiochip_add(&lpc32xx_gpiochip[i].chip);
+	}
+
+	return 0;
 }
+
+#ifdef CONFIG_OF
+static struct of_device_id lpc32xx_gpio_of_match[] __devinitdata = {
+	{ .compatible = "nxp,lpc3220-gpio", },
+	{ },
+};
+#endif
+
+static struct platform_driver lpc32xx_gpio_driver = {
+	.driver		= {
+		.name	= "lpc32xx-gpio",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(lpc32xx_gpio_of_match),
+	},
+	.probe		= lpc32xx_gpio_probe,
+};
+
+module_platform_driver(lpc32xx_gpio_driver);
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index c5d83a8a91c..0f425189de1 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -353,7 +353,7 @@ static void mcp23s08_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 			chip->base + t, bank, t, label,
 			(mcp->cache[MCP_IODIR] & mask) ? "in " : "out",
 			(mcp->cache[MCP_GPIO] & mask) ? "hi" : "lo",
-			(mcp->cache[MCP_GPPU] & mask) ? "  " : "up");
+			(mcp->cache[MCP_GPPU] & mask) ? "up" : "  ");
 		/* NOTE:  ignoring the irq-related registers */
 		seq_printf(s, "\n");
 	}
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index f0febe5b822..db01f151d41 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -611,17 +611,7 @@ static struct pci_driver ioh_gpio_driver = {
 	.resume = ioh_gpio_resume
 };
 
-static int __init ioh_gpio_pci_init(void)
-{
-	return pci_register_driver(&ioh_gpio_driver);
-}
-module_init(ioh_gpio_pci_init);
-
-static void __exit ioh_gpio_pci_exit(void)
-{
-	pci_unregister_driver(&ioh_gpio_driver);
-}
-module_exit(ioh_gpio_pci_exit);
+module_pci_driver(ioh_gpio_driver);
 
 MODULE_DESCRIPTION("OKI SEMICONDUCTOR ML-IOH series GPIO Driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index e6568c19c93..5a1817eedd1 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -163,7 +163,8 @@ static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
 	if (mask)
 		generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
 						     32 - ffs(mask)));
-	chip->irq_eoi(&desc->irq_data);
+	if (chip->irq_eoi)
+		chip->irq_eoi(&desc->irq_data);
 }
 
 static void mpc8xxx_irq_unmask(struct irq_data *d)
diff --git a/drivers/gpio/gpio-msic.c b/drivers/gpio/gpio-msic.c
new file mode 100644
index 00000000000..71a838f4450
--- /dev/null
+++ b/drivers/gpio/gpio-msic.c
@@ -0,0 +1,339 @@
+/*
+ * Intel Medfield MSIC GPIO driver>
+ * Copyright (c) 2011, Intel Corporation.
+ *
+ * Author: Mathias Nyman <mathias.nyman@linux.intel.com>
+ * Based on intel_pmic_gpio.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/intel_msic.h>
+
+/* the offset for the mapping of global gpio pin to irq */
+#define MSIC_GPIO_IRQ_OFFSET	0x100
+
+#define MSIC_GPIO_DIR_IN	0
+#define MSIC_GPIO_DIR_OUT	BIT(5)
+#define MSIC_GPIO_TRIG_FALL	BIT(1)
+#define MSIC_GPIO_TRIG_RISE	BIT(2)
+
+/* masks for msic gpio output GPIOxxxxCTLO registers */
+#define MSIC_GPIO_DIR_MASK	BIT(5)
+#define MSIC_GPIO_DRV_MASK	BIT(4)
+#define MSIC_GPIO_REN_MASK	BIT(3)
+#define MSIC_GPIO_RVAL_MASK	(BIT(2) | BIT(1))
+#define MSIC_GPIO_DOUT_MASK	BIT(0)
+
+/* masks for msic gpio input GPIOxxxxCTLI registers */
+#define MSIC_GPIO_GLBYP_MASK	BIT(5)
+#define MSIC_GPIO_DBNC_MASK	(BIT(4) | BIT(3))
+#define MSIC_GPIO_INTCNT_MASK	(BIT(2) | BIT(1))
+#define MSIC_GPIO_DIN_MASK	BIT(0)
+
+#define MSIC_NUM_GPIO		24
+
+struct msic_gpio {
+	struct platform_device	*pdev;
+	struct mutex		buslock;
+	struct gpio_chip	chip;
+	int			irq;
+	unsigned		irq_base;
+	unsigned long		trig_change_mask;
+	unsigned		trig_type;
+};
+
+/*
+ * MSIC has 24 gpios, 16 low voltage (1.2-1.8v) and 8 high voltage (3v).
+ * Both the high and low voltage gpios are divided in two banks.
+ * GPIOs are numbered with GPIO0LV0 as gpio_base in the following order:
+ * GPIO0LV0..GPIO0LV7: low voltage, bank 0, gpio_base
+ * GPIO1LV0..GPIO1LV7: low voltage, bank 1,  gpio_base + 8
+ * GPIO0HV0..GPIO0HV3: high voltage, bank 0, gpio_base + 16
+ * GPIO1HV0..GPIO1HV3: high voltage, bank 1, gpio_base + 20
+ */
+
+static int msic_gpio_to_ireg(unsigned offset)
+{
+	if (offset >= MSIC_NUM_GPIO)
+		return -EINVAL;
+
+	if (offset < 8)
+		return INTEL_MSIC_GPIO0LV0CTLI - offset;
+	if (offset < 16)
+		return INTEL_MSIC_GPIO1LV0CTLI - offset + 8;
+	if (offset < 20)
+		return INTEL_MSIC_GPIO0HV0CTLI - offset + 16;
+
+	return INTEL_MSIC_GPIO1HV0CTLI - offset + 20;
+}
+
+static int msic_gpio_to_oreg(unsigned offset)
+{
+	if (offset >= MSIC_NUM_GPIO)
+		return -EINVAL;
+
+	if (offset < 8)
+		return INTEL_MSIC_GPIO0LV0CTLO - offset;
+	if (offset < 16)
+		return INTEL_MSIC_GPIO1LV0CTLO - offset + 8;
+	if (offset < 20)
+		return INTEL_MSIC_GPIO0HV0CTLO - offset + 16;
+
+	return INTEL_MSIC_GPIO1HV0CTLO + offset + 20;
+}
+
+static int msic_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	int reg;
+
+	reg = msic_gpio_to_oreg(offset);
+	if (reg < 0)
+		return reg;
+
+	return intel_msic_reg_update(reg, MSIC_GPIO_DIR_IN, MSIC_GPIO_DIR_MASK);
+}
+
+static int msic_gpio_direction_output(struct gpio_chip *chip,
+			unsigned offset, int value)
+{
+	int reg;
+	unsigned mask;
+
+	value = (!!value) | MSIC_GPIO_DIR_OUT;
+	mask = MSIC_GPIO_DIR_MASK | MSIC_GPIO_DOUT_MASK;
+
+	reg = msic_gpio_to_oreg(offset);
+	if (reg < 0)
+		return reg;
+
+	return intel_msic_reg_update(reg, value, mask);
+}
+
+static int msic_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	u8 r;
+	int ret;
+	int reg;
+
+	reg = msic_gpio_to_ireg(offset);
+	if (reg < 0)
+		return reg;
+
+	ret = intel_msic_reg_read(reg, &r);
+	if (ret < 0)
+		return ret;
+
+	return r & MSIC_GPIO_DIN_MASK;
+}
+
+static void msic_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	int reg;
+
+	reg = msic_gpio_to_oreg(offset);
+	if (reg < 0)
+		return;
+
+	intel_msic_reg_update(reg, !!value , MSIC_GPIO_DOUT_MASK);
+}
+
+/*
+ * This is called from genirq with mg->buslock locked and
+ * irq_desc->lock held. We can not access the scu bus here, so we
+ * store the change and update in the bus_sync_unlock() function below
+ */
+static int msic_irq_type(struct irq_data *data, unsigned type)
+{
+	struct msic_gpio *mg = irq_data_get_irq_chip_data(data);
+	u32 gpio = data->irq - mg->irq_base;
+
+	if (gpio >= mg->chip.ngpio)
+		return -EINVAL;
+
+	/* mark for which gpio the trigger changed, protected by buslock */
+	mg->trig_change_mask |= (1 << gpio);
+	mg->trig_type = type;
+
+	return 0;
+}
+
+static int msic_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct msic_gpio *mg = container_of(chip, struct msic_gpio, chip);
+	return mg->irq_base + offset;
+}
+
+static void msic_bus_lock(struct irq_data *data)
+{
+	struct msic_gpio *mg = irq_data_get_irq_chip_data(data);
+	mutex_lock(&mg->buslock);
+}
+
+static void msic_bus_sync_unlock(struct irq_data *data)
+{
+	struct msic_gpio *mg = irq_data_get_irq_chip_data(data);
+	int offset;
+	int reg;
+	u8 trig = 0;
+
+	/* We can only get one change at a time as the buslock covers the
+	   entire transaction. The irq_desc->lock is dropped before we are
+	   called but that is fine */
+	if (mg->trig_change_mask) {
+		offset = __ffs(mg->trig_change_mask);
+
+		reg = msic_gpio_to_ireg(offset);
+		if (reg < 0)
+			goto out;
+
+		if (mg->trig_type & IRQ_TYPE_EDGE_RISING)
+			trig |= MSIC_GPIO_TRIG_RISE;
+		if (mg->trig_type & IRQ_TYPE_EDGE_FALLING)
+			trig |= MSIC_GPIO_TRIG_FALL;
+
+		intel_msic_reg_update(reg, trig, MSIC_GPIO_INTCNT_MASK);
+		mg->trig_change_mask = 0;
+	}
+out:
+	mutex_unlock(&mg->buslock);
+}
+
+/* Firmware does all the masking and unmasking for us, no masking here. */
+static void msic_irq_unmask(struct irq_data *data) { }
+
+static void msic_irq_mask(struct irq_data *data) { }
+
+static struct irq_chip msic_irqchip = {
+	.name			= "MSIC-GPIO",
+	.irq_mask		= msic_irq_mask,
+	.irq_unmask		= msic_irq_unmask,
+	.irq_set_type		= msic_irq_type,
+	.irq_bus_lock		= msic_bus_lock,
+	.irq_bus_sync_unlock	= msic_bus_sync_unlock,
+};
+
+static void msic_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
+{
+	struct irq_data *data = irq_desc_get_irq_data(desc);
+	struct msic_gpio *mg = irq_data_get_irq_handler_data(data);
+	struct irq_chip *chip = irq_data_get_irq_chip(data);
+	struct intel_msic *msic = pdev_to_intel_msic(mg->pdev);
+	int i;
+	int bitnr;
+	u8 pin;
+	unsigned long pending = 0;
+
+	for (i = 0; i < (mg->chip.ngpio / BITS_PER_BYTE); i++) {
+		intel_msic_irq_read(msic, INTEL_MSIC_GPIO0LVIRQ + i, &pin);
+		pending = pin;
+
+		if (pending) {
+			for_each_set_bit(bitnr, &pending, BITS_PER_BYTE)
+				generic_handle_irq(mg->irq_base +
+						   (i * BITS_PER_BYTE) + bitnr);
+		}
+	}
+	chip->irq_eoi(data);
+}
+
+static int __devinit platform_msic_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct intel_msic_gpio_pdata *pdata = dev->platform_data;
+	struct msic_gpio *mg;
+	int irq = platform_get_irq(pdev, 0);
+	int retval;
+	int i;
+
+	if (irq < 0) {
+		dev_err(dev, "no IRQ line\n");
+		return -EINVAL;
+	}
+
+	if (!pdata || !pdata->gpio_base) {
+		dev_err(dev, "incorrect or missing platform data\n");
+		return -EINVAL;
+	}
+
+	mg = kzalloc(sizeof(*mg), GFP_KERNEL);
+	if (!mg)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, mg);
+
+	mg->pdev = pdev;
+	mg->irq = irq;
+	mg->irq_base = pdata->gpio_base + MSIC_GPIO_IRQ_OFFSET;
+	mg->chip.label = "msic_gpio";
+	mg->chip.direction_input = msic_gpio_direction_input;
+	mg->chip.direction_output = msic_gpio_direction_output;
+	mg->chip.get = msic_gpio_get;
+	mg->chip.set = msic_gpio_set;
+	mg->chip.to_irq = msic_gpio_to_irq;
+	mg->chip.base = pdata->gpio_base;
+	mg->chip.ngpio = MSIC_NUM_GPIO;
+	mg->chip.can_sleep = 1;
+	mg->chip.dev = dev;
+
+	mutex_init(&mg->buslock);
+
+	retval = gpiochip_add(&mg->chip);
+	if (retval) {
+		dev_err(dev, "Adding MSIC gpio chip failed\n");
+		goto err;
+	}
+
+	for (i = 0; i < mg->chip.ngpio; i++) {
+		irq_set_chip_data(i + mg->irq_base, mg);
+		irq_set_chip_and_handler_name(i + mg->irq_base,
+					      &msic_irqchip,
+					      handle_simple_irq,
+					      "demux");
+	}
+	irq_set_chained_handler(mg->irq, msic_gpio_irq_handler);
+	irq_set_handler_data(mg->irq, mg);
+
+	return 0;
+err:
+	kfree(mg);
+	return retval;
+}
+
+static struct platform_driver platform_msic_gpio_driver = {
+	.driver = {
+		.name		= "msic_gpio",
+		.owner		= THIS_MODULE,
+	},
+	.probe		= platform_msic_gpio_probe,
+};
+
+static int __init platform_msic_gpio_init(void)
+{
+	return platform_driver_register(&platform_msic_gpio_driver);
+}
+
+subsys_initcall(platform_msic_gpio_init);
+
+MODULE_AUTHOR("Mathias Nyman <mathias.nyman@linux.intel.com>");
+MODULE_DESCRIPTION("Intel Medfield MSIC GPIO driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index e7914763457..c337143b18f 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -417,7 +417,7 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev)
 	err = bgpio_init(&port->bgc, &pdev->dev, 4,
 			 port->base + GPIO_PSR,
 			 port->base + GPIO_DR, NULL,
-			 port->base + GPIO_GDIR, NULL, false);
+			 port->base + GPIO_GDIR, NULL, 0);
 	if (err)
 		goto out_iounmap;
 
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index 385c58e8405..b4136501abd 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -244,7 +244,7 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev)
 	err = bgpio_init(&port->bgc, &pdev->dev, 4,
 			 port->base + PINCTRL_DIN(port->id),
 			 port->base + PINCTRL_DOUT(port->id), NULL,
-			 port->base + PINCTRL_DOE(port->id), NULL, false);
+			 port->base + PINCTRL_DOE(port->id), NULL, 0);
 	if (err)
 		goto out_