Merge 3.7-rc1 into tty-linus

This syncs up the tty-linus branch to the latest in Linus's tree to get all of
the UAPI stuff needed for the next set of patches to merge.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

7 files changed, 902 insertions, 12 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 8382dc832929..d055cee36942 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -150,6 +150,12 @@ config GPIO_MSM_V2
 	  Qualcomm MSM chips.  Most of the pins on the MSM can be
 	  selected for GPIO, and are controlled by this driver.
 
+config GPIO_MVEBU
+	def_bool y
+	depends on ARCH_MVEBU
+	select GPIO_GENERIC
+	select GENERIC_IRQ_CHIP
+
 config GPIO_MXC
 	def_bool y
 	depends on ARCH_MXC
@@ -409,6 +415,13 @@ config GPIO_TWL4030
 	  Say yes here to access the GPIO signals of various multi-function
 	  power management chips from Texas Instruments.
 
+config GPIO_TWL6040
+	tristate "TWL6040 GPO"
+	depends on TWL6040_CORE
+	help
+	  Say yes here to access the GPO signals of twl6040
+	  audio chip from Texas Instruments.
+
 config GPIO_WM831X
 	tristate "WM831x GPIOs"
 	depends on MFD_WM831X
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 0ffaa8423e87..9aeed6707326 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -42,6 +42,7 @@ 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-$(CONFIG_GPIO_MVEBU)        += gpio-mvebu.o
 obj-$(CONFIG_GPIO_MXC)		+= gpio-mxc.o
 obj-$(CONFIG_GPIO_MXS)		+= gpio-mxs.o
 obj-$(CONFIG_ARCH_OMAP)		+= gpio-omap.o
@@ -68,6 +69,7 @@ obj-$(CONFIG_GPIO_TPS6586X)	+= gpio-tps6586x.o
 obj-$(CONFIG_GPIO_TPS65910)	+= gpio-tps65910.o
 obj-$(CONFIG_GPIO_TPS65912)	+= gpio-tps65912.o
 obj-$(CONFIG_GPIO_TWL4030)	+= gpio-twl4030.o
+obj-$(CONFIG_GPIO_TWL6040)	+= gpio-twl6040.o
 obj-$(CONFIG_GPIO_UCB1400)	+= gpio-ucb1400.o
 obj-$(CONFIG_GPIO_VR41XX)	+= gpio-vr41xx.o
 obj-$(CONFIG_GPIO_VT8500)	+= gpio-vt8500.o
diff --git a/drivers/gpio/gpio-bt8xx.c b/drivers/gpio/gpio-bt8xx.c
index aba97abda77c..7d9d7cb35f28 100644
--- a/drivers/gpio/gpio-bt8xx.c
+++ b/drivers/gpio/gpio-bt8xx.c
@@ -50,7 +50,7 @@
 #include <linux/slab.h>
 
 /* Steal the hardware definitions from the bttv driver. */
-#include "../media/video/bt8xx/bt848.h"
+#include "../media/pci/bt8xx/bt848.h"
 
 
 #define BT8XXGPIO_NR_GPIOS		24 /* We have 24 GPIO pins */
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index b7c06517403d..d4d617966696 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -49,6 +49,10 @@ static const u8 ichx_regs[3][3] = {
 	{0x0c, 0x38, 0x48},	/* LVL[1-3] offsets */
 };
 
+static const u8 ichx_reglen[3] = {
+	0x30, 0x10, 0x10,
+};
+
 #define ICHX_WRITE(val, reg, base_res)	outl(val, (reg) + (base_res)->start)
 #define ICHX_READ(reg, base_res)	inl((reg) + (base_res)->start)
 
@@ -75,6 +79,7 @@ static struct {
 	struct resource *pm_base;	/* Power Mangagment IO base */
 	struct ichx_desc *desc;	/* Pointer to chipset-specific description */
 	u32 orig_gpio_ctrl;	/* Orig CTRL value, used to restore on exit */
+	u8 use_gpio;		/* Which GPIO groups are usable */
 } ichx_priv;
 
 static int modparam_gpiobase = -1;	/* dynamic */
@@ -123,8 +128,16 @@ static int ichx_read_bit(int reg, unsigned nr)
 	return data & (1 << bit) ? 1 : 0;
 }
 
+static int ichx_gpio_check_available(struct gpio_chip *gpio, unsigned nr)
+{
+	return (ichx_priv.use_gpio & (1 << (nr / 32))) ? 0 : -ENXIO;
+}
+
 static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
 {
+	if (!ichx_gpio_check_available(gpio, nr))
+		return -ENXIO;
+
 	/*
 	 * Try setting pin as an input and verify it worked since many pins
 	 * are output-only.
@@ -138,6 +151,9 @@ static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
 static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
 					int val)
 {
+	if (!ichx_gpio_check_available(gpio, nr))
+		return -ENXIO;
+
 	/* Set GPIO output value. */
 	ichx_write_bit(GPIO_LVL, nr, val, 0);
 
@@ -153,6 +169,9 @@ static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
 
 static int ichx_gpio_get(struct gpio_chip *chip, unsigned nr)
 {
+	if (!ichx_gpio_check_available(chip, nr))
+		return -ENXIO;
+
 	return ichx_read_bit(GPIO_LVL, nr);
 }
 
@@ -161,6 +180,9 @@ static int ich6_gpio_get(struct gpio_chip *chip, unsigned nr)
 	unsigned long flags;
 	u32 data;
 
+	if (!ichx_gpio_check_available(chip, nr))
+		return -ENXIO;
+
 	/*
 	 * GPI 0 - 15 need to be read from the power management registers on
 	 * a ICH6/3100 bridge.
@@ -291,6 +313,46 @@ static struct ichx_desc intel5_desc = {
 	.ngpio = 76,
 };
 
+static int __devinit ichx_gpio_request_regions(struct resource *res_base,
+						const char *name, u8 use_gpio)
+{
+	int i;
+
+	if (!res_base || !res_base->start || !res_base->end)
+		return -ENODEV;
+
+	for (i = 0; i < ARRAY_SIZE(ichx_regs[0]); i++) {
+		if (!(use_gpio & (1 << i)))
+			continue;
+		if (!request_region(res_base->start + ichx_regs[0][i],
+				    ichx_reglen[i], name))
+			goto request_err;
+	}
+	return 0;
+
+request_err:
+	/* Clean up: release already requested regions, if any */
+	for (i--; i >= 0; i--) {
+		if (!(use_gpio & (1 << i)))
+			continue;
+		release_region(res_base->start + ichx_regs[0][i],
+			       ichx_reglen[i]);
+	}
+	return -EBUSY;
+}
+
+static void ichx_gpio_release_regions(struct resource *res_base, u8 use_gpio)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ichx_regs[0]); i++) {
+		if (!(use_gpio & (1 << i)))
+			continue;
+		release_region(res_base->start + ichx_regs[0][i],
+			       ichx_reglen[i]);
+	}
+}
+
 static int __devinit ichx_gpio_probe(struct platform_device *pdev)
 {
 	struct resource *res_base, *res_pm;
@@ -329,12 +391,11 @@ static int __devinit ichx_gpio_probe(struct platform_device *pdev)
 	}
 
 	res_base = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_GPIO);
-	if (!res_base || !res_base->start || !res_base->end)
-		return -ENODEV;
-
-	if (!request_region(res_base->start, resource_size(res_base),
-				pdev->name))
-		return -EBUSY;
+	ichx_priv.use_gpio = ich_info->use_gpio;
+	err = ichx_gpio_request_regions(res_base, pdev->name,
+					ichx_priv.use_gpio);
+	if (err)
+		return err;
 
 	ichx_priv.gpio_base = res_base;
 
@@ -374,8 +435,7 @@ init:
 	return 0;
 
 add_err:
-	release_region(ichx_priv.gpio_base->start,
-			resource_size(ichx_priv.gpio_base));
+	ichx_gpio_release_regions(ichx_priv.gpio_base, ichx_priv.use_gpio);
 	if (ichx_priv.pm_base)
 		release_region(ichx_priv.pm_base->start,
 				resource_size(ichx_priv.pm_base));
@@ -393,8 +453,7 @@ static int __devexit ichx_gpio_remove(struct platform_device *pdev)
 		return err;
 	}
 
-	release_region(ichx_priv.gpio_base->start,
-				resource_size(ichx_priv.gpio_base));
+	ichx_gpio_release_regions(ichx_priv.gpio_base, ichx_priv.use_gpio);
 	if (ichx_priv.pm_base)
 		release_region(ichx_priv.pm_base->start,
 				resource_size(ichx_priv.pm_base));
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
new file mode 100644
index 000000000000..902af437eaf2
--- /dev/null
+++ b/drivers/gpio/gpio-mvebu.c
@@ -0,0 +1,679 @@
+/*
+ * GPIO driver for Marvell SoCs
+ *
+ * Copyright (C) 2012 Marvell
+ *
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ * Andrew Lunn <andrew@lunn.ch>
+ * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * This driver is a fairly straightforward GPIO driver for the
+ * complete family of Marvell EBU SoC platforms (Orion, Dove,
+ * Kirkwood, Discovery, Armada 370/XP). The only complexity of this
+ * driver is the different register layout that exists between the
+ * non-SMP platforms (Orion, Dove, Kirkwood, Armada 370) and the SMP
+ * platforms (MV78200 from the Discovery family and the Armada
+ * XP). Therefore, this driver handles three variants of the GPIO
+ * block:
+ * - the basic variant, called "orion-gpio", with the simplest
+ *   register set. Used on Orion, Dove, Kirkwoord, Armada 370 and
+ *   non-SMP Discovery systems
+ * - the mv78200 variant for MV78200 Discovery systems. This variant
+ *   turns the edge mask and level mask registers into CPU0 edge
+ *   mask/level mask registers, and adds CPU1 edge mask/level mask
+ *   registers.
+ * - the armadaxp variant for Armada XP systems. This variant keeps
+ *   the normal cause/edge mask/level mask registers when the global
+ *   interrupts are used, but adds per-CPU cause/edge mask/level mask
+ *   registers n a separate memory area for the per-CPU GPIO
+ *   interrupts.
+ */
+
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/irqdomain.h>
+#include <linux/io.h>
+#include <linux/of_irq.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
+
+/*
+ * GPIO unit register offsets.
+ */
+#define GPIO_OUT_OFF		0x0000
+#define GPIO_IO_CONF_OFF	0x0004
+#define GPIO_BLINK_EN_OFF	0x0008
+#define GPIO_IN_POL_OFF		0x000c
+#define GPIO_DATA_IN_OFF	0x0010
+#define GPIO_EDGE_CAUSE_OFF	0x0014
+#define GPIO_EDGE_MASK_OFF	0x0018
+#define GPIO_LEVEL_MASK_OFF	0x001c
+
+/* The MV78200 has per-CPU registers for edge mask and level mask */
+#define GPIO_EDGE_MASK_MV78200_OFF(cpu)   ((cpu) ? 0x30 : 0x18)
+#define GPIO_LEVEL_MASK_MV78200_OFF(cpu)  ((cpu) ? 0x34 : 0x1C)
+
+/* The Armada XP has per-CPU registers for interrupt cause, interrupt
+ * mask and interrupt level mask. Those are relative to the
+ * percpu_membase. */
+#define GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu) ((cpu) * 0x4)
+#define GPIO_EDGE_MASK_ARMADAXP_OFF(cpu)  (0x10 + (cpu) * 0x4)
+#define GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu) (0x20 + (cpu) * 0x4)
+
+#define MVEBU_GPIO_SOC_VARIANT_ORION    0x1
+#define MVEBU_GPIO_SOC_VARIANT_MV78200  0x2
+#define MVEBU_GPIO_SOC_VARIANT_ARMADAXP 0x3
+
+#define MVEBU_MAX_GPIO_PER_BANK         32
+
+struct mvebu_gpio_chip {
+	struct gpio_chip   chip;
+	spinlock_t	   lock;
+	void __iomem	  *membase;
+	void __iomem	  *percpu_membase;
+	unsigned int       irqbase;
+	struct irq_domain *domain;
+	int                soc_variant;
+};
+
+/*
+ * Functions returning addresses of individual registers for a given
+ * GPIO controller.
+ */
+static inline void __iomem *mvebu_gpioreg_out(struct mvebu_gpio_chip *mvchip)
+{
+	return mvchip->membase + GPIO_OUT_OFF;
+}
+
+static inline void __iomem *mvebu_gpioreg_io_conf(struct mvebu_gpio_chip *mvchip)
+{
+	return mvchip->membase + GPIO_IO_CONF_OFF;
+}
+
+static inline void __iomem *mvebu_gpioreg_in_pol(struct mvebu_gpio_chip *mvchip)
+{
+	return mvchip->membase + GPIO_IN_POL_OFF;
+}
+
+static inline void __iomem *mvebu_gpioreg_data_in(struct mvebu_gpio_chip *mvchip)
+{
+	return mvchip->membase + GPIO_DATA_IN_OFF;
+}
+
+static inline void __iomem *mvebu_gpioreg_edge_cause(struct mvebu_gpio_chip *mvchip)
+{
+	int cpu;
+
+	switch(mvchip->soc_variant) {
+	case MVEBU_GPIO_SOC_VARIANT_ORION:
+	case MVEBU_GPIO_SOC_VARIANT_MV78200:
+		return mvchip->membase + GPIO_EDGE_CAUSE_OFF;
+	case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+		cpu = smp_processor_id();
+		return mvchip->percpu_membase + GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu);
+	default:
+		BUG();
+	}
+}
+
+static inline void __iomem *mvebu_gpioreg_edge_mask(struct mvebu_gpio_chip *mvchip)
+{
+	int cpu;
+
+	switch(mvchip->soc_variant) {
+	case MVEBU_GPIO_SOC_VARIANT_ORION:
+		return mvchip->membase + GPIO_EDGE_MASK_OFF;
+	case MVEBU_GPIO_SOC_VARIANT_MV78200:
+		cpu = smp_processor_id();
+		return mvchip->membase + GPIO_EDGE_MASK_MV78200_OFF(cpu);
+	case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+		cpu = smp_processor_id();
+		return mvchip->percpu_membase + GPIO_EDGE_MASK_ARMADAXP_OFF(cpu);
+	default:
+		BUG();
+	}
+}
+
+static void __iomem *mvebu_gpioreg_level_mask(struct mvebu_gpio_chip *mvchip)
+{
+	int cpu;
+
+	switch(mvchip->soc_variant) {
+	case MVEBU_GPIO_SOC_VARIANT_ORION:
+		return mvchip->membase + GPIO_LEVEL_MASK_OFF;
+	case MVEBU_GPIO_SOC_VARIANT_MV78200:
+		cpu = smp_processor_id();
+		return mvchip->membase + GPIO_LEVEL_MASK_MV78200_OFF(cpu);
+	case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+		cpu = smp_processor_id();
+		return mvchip->percpu_membase + GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu);
+	default:
+		BUG();
+	}
+}
+
+/*
+ * Functions implementing the gpio_chip methods
+ */
+
+int mvebu_gpio_request(struct gpio_chip *chip, unsigned pin)
+{
+	return pinctrl_request_gpio(chip->base + pin);
+}
+
+void mvebu_gpio_free(struct gpio_chip *chip, unsigned pin)
+{
+	pinctrl_free_gpio(chip->base + pin);
+}
+
+static void mvebu_gpio_set(struct gpio_chip *chip, unsigned pin, int value)
+{
+	struct mvebu_gpio_chip *mvchip =
+		container_of(chip, struct mvebu_gpio_chip, chip);
+	unsigned long flags;
+	u32 u;
+
+	spin_lock_irqsave(&mvchip->lock, flags);
+	u = readl_relaxed(mvebu_gpioreg_out(mvchip));
+	if (value)
+		u |= 1 << pin;
+	else
+		u &= ~(1 << pin);
+	writel_relaxed(u, mvebu_gpioreg_out(mvchip));
+	spin_unlock_irqrestore(&mvchip->lock, flags);
+}
+
+static int mvebu_gpio_get(struct gpio_chip *chip, unsigned pin)
+{
+	struct mvebu_gpio_chip *mvchip =
+		container_of(chip, struct mvebu_gpio_chip, chip);
+	u32 u;
+
+	if (readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & (1 << pin)) {
+		u = readl_relaxed(mvebu_gpioreg_data_in(mvchip)) ^
+			readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
+	} else {
+		u = readl_relaxed(mvebu_gpioreg_out(mvchip));
+	}
+
+	return (u >> pin) & 1;
+}
+
+static int mvebu_gpio_direction_input(struct gpio_chip *chip, unsigned pin)
+{
+	struct mvebu_gpio_chip *mvchip =
+		container_of(chip, struct mvebu_gpio_chip, chip);
+	unsigned long flags;
+	int ret;
+	u32 u;
+
+	/* Check with the pinctrl driver whether this pin is usable as
+	 * an input GPIO */
+	ret = pinctrl_gpio_direction_input(chip->base + pin);
+	if (ret)
+		return ret;
+
+	spin_lock_irqsave(&mvchip->lock, flags);
+	u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
+	u |= 1 << pin;
+	writel_relaxed(u, mvebu_gpioreg_io_conf(mvchip));
+	spin_unlock_irqrestore(&mvchip->lock, flags);
+
+	return 0;
+}
+
+static int mvebu_gpio_direction_output(struct gpio_chip *chip, unsigned pin,
+				       int value)
+{
+	struct mvebu_gpio_chip *mvchip =
+		container_of(chip, struct mvebu_gpio_chip, chip);
+	unsigned long flags;
+	int ret;
+	u32 u;
+
+	/* Check with the pinctrl driver whether this pin is usable as
+	 * an output GPIO */
+	ret = pinctrl_gpio_direction_output(chip->base + pin);
+	if (ret)
+		return ret;
+
+	spin_lock_irqsave(&mvchip->lock, flags);
+	u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
+	u &= ~(1 << pin);
+	writel_relaxed(u, mvebu_gpioreg_io_conf(mvchip));
+	spin_unlock_irqrestore(&mvchip->lock, flags);
+
+	return 0;
+}
+
+static int mvebu_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
+{
+	struct mvebu_gpio_chip *mvchip =
+		container_of(chip, struct mvebu_gpio_chip, chip);
+	return irq_create_mapping(mvchip->domain, pin);
+}
+
+/*
+ * Functions implementing the irq_chip methods
+ */
+static void mvebu_gpio_irq_ack(struct irq_data *d)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct mvebu_gpio_chip *mvchip = gc->private;
+	u32 mask = ~(1 << (d->irq - gc->irq_base));
+
+	irq_gc_lock(gc);
+	writel_relaxed(mask, mvebu_gpioreg_edge_cause(mvchip));
+	irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_edge_irq_mask(struct irq_data *d)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct mvebu_gpio_chip *mvchip = gc->private;
+	u32 mask = 1 << (d->irq - gc->irq_base);
+
+	irq_gc_lock(gc);
+	gc->mask_cache &= ~mask;
+	writel_relaxed(gc->mask_cache, mvebu_gpioreg_edge_mask(mvchip));
+	irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_edge_irq_unmask(struct irq_data *d)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct mvebu_gpio_chip *mvchip = gc->private;
+	u32 mask = 1 << (d->irq - gc->irq_base);
+
+	irq_gc_lock(gc);
+	gc->mask_cache |= mask;
+	writel_relaxed(gc->mask_cache, mvebu_gpioreg_edge_mask(mvchip));
+	irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_level_irq_mask(struct irq_data *d)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct mvebu_gpio_chip *mvchip = gc->private;
+	u32 mask = 1 << (d->irq - gc->irq_base);
+
+	irq_gc_lock(gc);
+	gc->mask_cache &= ~mask;
+	writel_relaxed(gc->mask_cache, mvebu_gpioreg_level_mask(mvchip));
+	irq_gc_unlock(gc);
+}
+
+static void mvebu_gpio_level_irq_unmask(struct irq_data *d)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct mvebu_gpio_chip *mvchip = gc->private;
+	u32 mask = 1 << (d->irq - gc->irq_base);
+
+	irq_gc_lock(gc);
+	gc->mask_cache |= mask;
+	writel_relaxed(gc->mask_cache, mvebu_gpioreg_level_mask(mvchip));
+	irq_gc_unlock(gc);
+}
+
+/*****************************************************************************
+ * MVEBU GPIO IRQ
+ *
+ * GPIO_IN_POL register controls whether GPIO_DATA_IN will hold the same
+ * value of the line or the opposite value.
+ *
+ * Level IRQ handlers: DATA_IN is used directly as cause register.
+ *                     Interrupt are masked by LEVEL_MASK registers.
+ * Edge IRQ handlers:  Change in DATA_IN are latched in EDGE_CAUSE.
+ *                     Interrupt are masked by EDGE_MASK registers.
+ * Both-edge handlers: Similar to regular Edge handlers, but also swaps
+ *                     the polarity to catch the next line transaction.
+ *                     This is a race condition that might not perfectly
+ *                     work on some use cases.
+ *
+ * Every eight GPIO lines are grouped (OR'ed) before going up to main
+ * cause register.
+ *
+ *                    EDGE  cause    mask
+ *        data-in   /--------| |-----| |----\
+ *     -----| |-----                         ---- to main cause reg
+ *           X      \----------------| |----/
+ *        polarity    LEVEL          mask
+ *
+ ****************************************************************************/
+
+static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct irq_chip_type *ct = irq_data_get_chip_type(d);
+	struct mvebu_gpio_chip *mvchip = gc->private;
+	int pin;
+	u32 u;
+
+	pin = d->hwirq;
+
+	u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & (1 << pin);
+	if (!u) {
+		return -EINVAL;
+	}
+
+	type &= IRQ_TYPE_SENSE_MASK;
+	if (type == IRQ_TYPE_NONE)
+		return -EINVAL;
+
+	/* Check if we need to change chip and handler */
+	if (!(ct->type & type))
+		if (irq_setup_alt_chip(d, type))
+			return -EINVAL;
+
+	/*
+	 * Configure interrupt polarity.
+	 */
+	switch(type) {
+	case IRQ_TYPE_EDGE_RISING:
+	case IRQ_TYPE_LEVEL_HIGH:
+		u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
+		u &= ~(1 << pin);
+		writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
+	case IRQ_TYPE_EDGE_FALLING:
+	case IRQ_TYPE_LEVEL_LOW:
+		u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
+		u |= 1 << pin;
+		writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
+	case IRQ_TYPE_EDGE_BOTH: {
+		u32 v;
+
+		v = readl_relaxed(mvebu_gpioreg_in_pol(mvchip)) ^
+			readl_relaxed(mvebu_gpioreg_data_in(mvchip));
+
+		/*
+		 * set initial polarity based on current input level
+		 */
+		u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
+		if (v & (1 << pin))
+			u |= 1 << pin;		/* falling */
+		else
+			u &= ~(1 << pin);	/* rising */
+		writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
+	}
+	}
+	return 0;
+}
+
+static void mvebu_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	struct mvebu_gpio_chip *mvchip = irq_get_handler_data(irq);
+	u32 cause, type;
+	int i;
+
+	if (mvchip == NULL)
+		return;
+
+	cause = readl_relaxed(mvebu_gpioreg_data_in(mvchip)) &
+		readl_relaxed(mvebu_gpioreg_level_mask(mvchip));
+	cause |= readl_relaxed(mvebu_gpioreg_edge_cause(mvchip)) &
+		readl_relaxed(mvebu_gpioreg_edge_mask(mvchip));
+
+	for (i = 0; i < mvchip->chip.ngpio; i++) {
+		int irq;
+
+		irq = mvchip->irqbase + i;
+
+		if (!(cause & (1 << i)))
+			continue;
+
+		type = irqd_get_trigger_type(irq_get_irq_data(irq));
+		if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
+			/* Swap polarity (race with GPIO line) */
+			u32 polarity;
+
+			polarity = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
+			polarity ^= 1 << i;
+			writel_relaxed(polarity, mvebu_gpioreg_in_pol(mvchip));
+		}
+		generic_handle_irq(irq);
+	}
+}
+
+static struct platform_device_id mvebu_gpio_ids[] = {
+	{
+		.name = "orion-gpio",
+	}, {
+		.name = "mv78200-gpio",
+	}, {
+		.name = "armadaxp-gpio",
+	}, {
+		/* sentinel */
+	},
+};
+MODULE_DEVICE_TABLE(platform, mvebu_gpio_ids);
+
+static struct of_device_id mvebu_gpio_of_match[] __devinitdata = {
+	{
+		.compatible = "marvell,orion-gpio",
+		.data       = (void*) MVEBU_GPIO_SOC_VARIANT_ORION,
+	},
+	{
+		.compatible = "marvell,mv78200-gpio",
+		.data       = (void*) MVEBU_GPIO_SOC_VARIANT_MV78200,
+	},
+	{
+		.compatible = "marvell,armadaxp-gpio",
+		.data       = (void*) MVEBU_GPIO_SOC_VARIANT_ARMADAXP,
+	},
+	{
+		/* sentinel */
+	},
+};
+MODULE_DEVICE_TABLE(of, mvebu_gpio_of_match);
+
+static int __devinit mvebu_gpio_probe(struct platform_device *pdev)
+{
+	struct mvebu_gpio_chip *mvchip;
+	const struct of_device_id *match;
+	struct device_node *np = pdev->dev.of_node;
+	struct resource *res;
+	struct irq_chip_generic *gc;
+	struct irq_chip_type *ct;
+	unsigned int ngpios;
+	int soc_variant;
+	int i, cpu, id;
+
+	match = of_match_device(mvebu_gpio_of_match, &pdev->dev);
+	if (match)
+		soc_variant = (int) match->data;
+	else
+		soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (! res) {
+		dev_err(&pdev->dev, "Cannot get memory resource\n");
+		return -ENODEV;
+	}
+
+	mvchip = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_gpio_chip), GFP_KERNEL);
+	if (! mvchip){
+		dev_err(&pdev->dev, "Cannot allocate memory\n");
+		return -ENOMEM;
+	}
+
+	if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) {
+		dev_err(&pdev->dev, "Missing ngpios OF property\n");
+		return -ENODEV;
+	}
+
+	id = of_alias_get_id(pdev->dev.of_node, "gpio");
+	if (id < 0) {
+		dev_err(&pdev->dev, "Couldn't get OF id\n");
+		return id;
+	}
+
+	mvchip->soc_variant = soc_variant;
+	mvchip->chip.label = dev_name(&pdev->dev);
+	mvchip->chip.dev = &pdev->dev;
+	mvchip->chip.request = mvebu_gpio_request;
+	mvchip->chip.direction_input = mvebu_gpio_direction_input;
+	mvchip->chip.get = mvebu_gpio_get;
+	mvchip->chip.direction_output = mvebu_gpio_direction_output;
+	mvchip->chip.set = mvebu_gpio_set;
+	mvchip->chip.to_irq = mvebu_gpio_to_irq;
+	mvchip->chip.base = id * MVEBU_MAX_GPIO_PER_BANK;
+	mvchip->chip.ngpio = ngpios;
+	mvchip->chip.can_sleep = 0;
+#ifdef CONFIG_OF
+	mvchip->chip.of_node = np;
+#endif
+
+	spin_lock_init(&mvchip->lock);
+	mvchip->membase = devm_request_and_ioremap(&pdev->dev, res);
+	if (! mvchip->membase) {
+		dev_err(&pdev->dev, "Cannot ioremap\n");
+		kfree(mvchip->chip.label);
+		return -ENOMEM;
+	}
+
+	/* The Armada XP has a second range of registers for the
+	 * per-CPU registers */
+	if (soc_variant == MVEBU_GPIO_SOC_VARIANT_ARMADAXP) {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+		if (! res) {
+			dev_err(&pdev->dev, "Cannot get memory resource\n");
+			kfree(mvchip->chip.label);
+			return -ENODEV;
+		}
+
+		mvchip->percpu_membase = devm_request_and_ioremap(&pdev->dev, res);
+		if (! mvchip->percpu_membase) {
+			dev_err(&pdev->dev, "Cannot ioremap\n");
+			kfree(mvchip->chip.label);
+			return -ENOMEM;
+		}
+	}
+
+	/*
+	 * Mask and clear GPIO interrupts.
+	 */
+	switch(soc_variant) {
+	case MVEBU_GPIO_SOC_VARIANT_ORION:
+		writel_relaxed(0, mvchip->membase + GPIO_EDGE_CAUSE_OFF);
+		writel_relaxed(0, mvchip->membase + GPIO_EDGE_MASK_OFF);
+		writel_relaxed(0, mvchip->membase + GPIO_LEVEL_MASK_OFF);
+		break;
+	case MVEBU_GPIO_SOC_VARIANT_MV78200:
+		writel_relaxed(0, mvchip->membase + GPIO_EDGE_CAUSE_OFF);
+		for (cpu = 0; cpu < 2; cpu++) {
+			writel_relaxed(0, mvchip->membase +
+				       GPIO_EDGE_MASK_MV78200_OFF(cpu));
+			writel_relaxed(0, mvchip->membase +
+				       GPIO_LEVEL_MASK_MV78200_OFF(cpu));
+		}
+		break;
+	case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
+		writel_relaxed(0, mvchip->membase + GPIO_EDGE_CAUSE_OFF);
+		writel_relaxed(0, mvchip->membase + GPIO_EDGE_MASK_OFF);
+		writel_relaxed(0, mvchip->membase + GPIO_LEVEL_MASK_OFF);
+		for (cpu = 0; cpu < 4; cpu++) {
+			writel_relaxed(0, mvchip->percpu_membase +
+				       GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu));
+			writel_relaxed(0, mvchip->percpu_membase +
+				       GPIO_EDGE_MASK_ARMADAXP_OFF(cpu));
+			writel_relaxed(0, mvchip->percpu_membase +
+				       GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu));
+		}
+		break;
+	default:
+		BUG();
+	}
+
+	gpiochip_add(&mvchip->chip);
+
+	/* Some gpio controllers do not provide irq support */
+	if (!of_irq_count(np))
+		return 0;
+
+	/* Setup the interrupt handlers. Each chip can have up to 4
+	 * interrupt handlers, with each handler dealing with 8 GPIO
+	 * pins. */
+	for (i = 0; i < 4; i++) {
+		int irq;
+		irq = platform_get_irq(pdev, i);
+		if (irq < 0)
+			continue;
+		irq_set_handler_data(irq, mvchip);
+		irq_set_chained_handler(irq, mvebu_gpio_irq_handler);
+	}
+
+	mvchip->irqbase = irq_alloc_descs(-1, 0, ngpios, -1);
+	if (mvchip->irqbase < 0) {
+		dev_err(&pdev->dev, "no irqs\n");
+		kfree(mvchip->chip.label);
+		return -ENOMEM;
+	}
+
+	gc = irq_alloc_generic_chip("mvebu_gpio_irq", 2, mvchip->irqbase,
+				    mvchip->membase, handle_level_irq);
+	if (! gc) {
+		dev_err(&pdev->dev, "Cannot allocate generic irq_chip\n");
+		kfree(mvchip->chip.label);
+		return -ENOMEM;
+	}
+
+	gc->private = mvchip;
+	ct = &gc->chip_types[0];
+	ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
+	ct->chip.irq_mask = mvebu_gpio_level_irq_mask;
+	ct->chip.irq_unmask = mvebu_gpio_level_irq_unmask;
+	ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
+	ct->chip.name = mvchip->chip.label;
+
+	ct = &gc->chip_types[1];
+	ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
+	ct->chip.irq_ack = mvebu_gpio_irq_ack;
+	ct->chip.irq_mask = mvebu_gpio_edge_irq_mask;
+	ct->chip.irq_unmask = mvebu_gpio_edge_irq_unmask;
+	ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
+	ct->handler = handle_edge_irq;
+	ct->chip.name = mvchip->chip.label;
+
+	irq_setup_generic_chip(gc, IRQ_MSK(ngpios), IRQ_GC_INIT_MASK_CACHE,
+			       IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
+
+	/* Setup irq domain on top of the generic chip. */
+	mvchip->domain = irq_domain_add_legacy(np, mvchip->chip.ngpio,
+					       mvchip->irqbase, 0,
+					       &irq_domain_simple_ops,
+					       mvchip);
+	if (!mvchip->domain) {
+		dev_err(&pdev->dev, "couldn't allocate irq domain %s (DT).\n",
+			mvchip->chip.label);
+		irq_remove_generic_chip(gc, IRQ_MSK(ngpios), IRQ_NOREQUEST,
+					IRQ_LEVEL | IRQ_NOPROBE);
+		kfree(gc);
+		kfree(mvchip->chip.label);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static struct platform_driver mvebu_gpio_driver = {
+	.driver		= {
+		.name	        = "mvebu-gpio",
+		.owner	        = THIS_MODULE,
+		.of_match_table = mvebu_gpio_of_match,
+	},
+	.probe		= mvebu_gpio_probe,
+	.id_table	= mvebu_gpio_ids,
+};
+
+static int __init mvebu_gpio_init(void)
+{
+	return platform_driver_register(&mvebu_gpio_driver);
+}
+postcore_initcall(mvebu_gpio_init);
diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c
index e35096bf3cfb..8bead0bb6459 100644
--- a/drivers/gpio/gpio-stp-xway.c
+++ b/drivers/gpio/gpio-stp-xway.c
@@ -82,7 +82,7 @@ struct xway_stp {
 	struct gpio_chip gc;
 	void __iomem *virt;
 	u32 edge;	/* rising or falling edge triggered shift register */
-	u16 shadow;	/* shadow the shift registers state */
+	u32 shadow;	/* shadow the shift registers state */
 	u8 groups;	/* we can drive 1-3 groups of 8bit each */
 	u8 dsl;		/* the 2 LSBs can be driven by the dsl core */
 	u8 phy1;	/* 3 bits can be driven by phy1 */
diff --git a/drivers/gpio/gpio-twl6040.c b/drivers/gpio/gpio-twl6040.c
new file mode 100644
index 000000000000..dd58e8b25043
--- /dev/null
+++ b/drivers/gpio/gpio-twl6040.c
@@ -0,0 +1,137 @@
+/*
+ * Access to GPOs on TWL6040 chip
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Authors:
+ *	Sergio Aguirre <saaguirre@ti.com>
+ *	Peter Ujfalusi <peter.ujfalusi@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kthread.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+
+#include <linux/mfd/twl6040.h>
+
+static struct gpio_chip twl6040gpo_chip;
+
+static int twl6040gpo_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct twl6040 *twl6040 = dev_get_drvdata(chip->dev->parent);
+	int ret = 0;
+
+	ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
+	if (ret < 0)
+		return ret;
+
+	return (ret >> offset) & 1;
+}
+
+static int twl6040gpo_direction_out(struct gpio_chip *chip, unsigned offset,
+				    int value)
+{
+	/* This only drives GPOs, and can't change direction */
+	return 0;
+}
+
+static void twl6040gpo_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	struct twl6040 *twl6040 = dev_get_drvdata(chip->dev->parent);
+	int ret;
+	u8 gpoctl;
+
+	ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
+	if (ret < 0)
+		return;
+
+	if (value)
+		gpoctl = ret | (1 << offset);
+	else
+		gpoctl = ret & ~(1 << offset);
+
+	twl6040_reg_write(twl6040, TWL6040_REG_GPOCTL, gpoctl);
+}
+
+static struct gpio_chip twl6040gpo_chip = {
+	.label			= "twl6040",
+	.owner			= THIS_MODULE,
+	.get			= twl6040gpo_get,
+	.direction_output	= twl6040gpo_direction_out,
+	.set			= twl6040gpo_set,
+	.can_sleep		= 1,
+};
+
+/*----------------------------------------------------------------------*/
+
+static int __devinit gpo_twl6040_probe(struct platform_device *pdev)
+{
+	struct twl6040_gpo_data *pdata = pdev->dev.platform_data;
+	struct device *twl6040_core_dev = pdev->dev.parent;
+	struct twl6040 *twl6040 = dev_get_drvdata(twl6040_core_dev);
+	int ret;
+
+	if (pdata)
+		twl6040gpo_chip.base = pdata->gpio_base;
+	else
+		twl6040gpo_chip.base = -1;
+
+	if (twl6040_get_revid(twl6040) < TWL6041_REV_ES2_0)
+		twl6040gpo_chip.ngpio = 3; /* twl6040 have 3 GPO */
+	else
+		twl6040gpo_chip.ngpio = 1; /* twl6041 have 1 GPO */
+
+	twl6040gpo_chip.dev = &pdev->dev;
+#ifdef CONFIG_OF_GPIO
+	twl6040gpo_chip.of_node = twl6040_core_dev->of_node;
+#endif
+
+	ret = gpiochip_add(&twl6040gpo_chip);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
+		twl6040gpo_chip.ngpio = 0;
+	}
+
+	return ret;
+}
+
+static int __devexit gpo_twl6040_remove(struct platform_device *pdev)
+{
+	return gpiochip_remove(&twl6040gpo_chip);
+}
+
+/* Note:  this hardware lives inside an I2C-based multi-function device. */
+MODULE_ALIAS("platform:twl6040-gpo");
+
+static struct platform_driver gpo_twl6040_driver = {
+	.driver = {
+		.name	= "twl6040-gpo",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= gpo_twl6040_probe,
+	.remove		= gpo_twl6040_remove,
+};
+
+module_platform_driver(gpo_twl6040_driver);
+
+MODULE_AUTHOR("Texas Instruments, Inc.");
+MODULE_DESCRIPTION("GPO interface for TWL6040");
+MODULE_LICENSE("GPL");