7 files changed, 72 insertions, 30 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index d055cee36942..6dbc4031f825 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -47,7 +47,7 @@ if GPIOLIB
 
 config OF_GPIO
         def_bool y
-        depends on OF && !SPARC
+        depends on OF
 
 config DEBUG_GPIO
         bool "Debug GPIO calls"
@@ -152,7 +152,7 @@ config GPIO_MSM_V2
 
 config GPIO_MVEBU
         def_bool y
-        depends on ARCH_MVEBU
+        depends on PLAT_ORION
         select GPIO_GENERIC
         select GENERIC_IRQ_CHIP
 
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index ed3e55161bdc..f05e54258ffb 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -153,7 +153,7 @@ static int __devinit gen_74x164_probe(struct spi_device *spi)
         }
 
         chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers;
-        chip->buffer = devm_kzalloc(&spi->dev, chip->gpio_chip.ngpio, GFP_KERNEL);
+        chip->buffer = devm_kzalloc(&spi->dev, chip->registers, GFP_KERNEL);
         if (!chip->buffer) {
                 ret = -ENOMEM;
                 goto exit_destroy;
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 7a874129e5d8..cf7afb9eb61a 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -244,6 +244,8 @@ static int mvebu_gpio_direction_output(struct gpio_chip *chip, unsigned pin,
         if (ret)
                 return ret;
 
+        mvebu_gpio_set(chip, pin, value);
+
         spin_lock_irqsave(&mvchip->lock, flags);
         u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
         u &= ~(1 << pin);
@@ -644,7 +646,7 @@ static int __devinit mvebu_gpio_probe(struct platform_device *pdev)
         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_setup_generic_chip(gc, IRQ_MSK(ngpios), 0,
                                IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
 
         /* Setup irq domain on top of the generic chip. */
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 94cbc842fbc3..d335af1d4d85 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -251,6 +251,40 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
         }
 }
 
+/**
+ * _clear_gpio_debounce - clear debounce settings for a gpio
+ * @bank: the gpio bank we're acting upon
+ * @gpio: the gpio number on this @gpio
+ *
+ * If a gpio is using debounce, then clear the debounce enable bit and if
+ * this is the only gpio in this bank using debounce, then clear the debounce
+ * time too. The debounce clock will also be disabled when calling this function
+ * if this is the only gpio in the bank using debounce.
+ */
+static void _clear_gpio_debounce(struct gpio_bank *bank, unsigned gpio)
+{
+        u32 gpio_bit = GPIO_BIT(bank, gpio);
+
+        if (!bank->dbck_flag)
+                return;
+
+        if (!(bank->dbck_enable_mask & gpio_bit))
+                return;
+
+        bank->dbck_enable_mask &= ~gpio_bit;
+        bank->context.debounce_en &= ~gpio_bit;
+        __raw_writel(bank->context.debounce_en,
+                     bank->base + bank->regs->debounce_en);
+
+        if (!bank->dbck_enable_mask) {
+                bank->context.debounce = 0;
+                __raw_writel(bank->context.debounce, bank->base +
+                             bank->regs->debounce);
+                clk_disable(bank->dbck);
+                bank->dbck_enabled = false;
+        }
+}
+
 static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
                                                 unsigned trigger)
 {
@@ -539,6 +573,7 @@ static void _reset_gpio(struct gpio_bank *bank, int gpio)
         _set_gpio_irqenable(bank, gpio, 0);
         _clear_gpio_irqstatus(bank, gpio);
         _set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
+        _clear_gpio_debounce(bank, gpio);
 }
 
 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index a006f0db15af..88f41e51565b 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -2797,27 +2797,6 @@ static __init void exynos4_gpiolib_init(void)
         int group = 0;
         void __iomem *gpx_base;
 
-#ifdef CONFIG_PINCTRL_SAMSUNG
-                /*
-                 * This gpio driver includes support for device tree support and
-                 * there are platforms using it. In order to maintain
-                 * compatibility with those platforms, and to allow non-dt
-                 * Exynos4210 platforms to use this gpiolib support, a check
-                 * is added to find out if there is a active pin-controller
-                 * driver support available. If it is available, this gpiolib
-                 * support is ignored and the gpiolib support available in
-                 * pin-controller driver is used. This is a temporary check and
-                 * will go away when all of the Exynos4210 platforms have
-                 * switched to using device tree and the pin-ctrl driver.
-                 */
-                struct device_node *pctrl_np;
-                const char *pctrl_compat = "samsung,pinctrl-exynos4210";
-                pctrl_np = of_find_compatible_node(NULL, NULL, pctrl_compat);
-                if (pctrl_np)
-                        if (of_device_is_available(pctrl_np))
-                                return;
-#endif
-
         /* gpio part1 */
         gpio_base1 = ioremap(EXYNOS4_PA_GPIO1, SZ_4K);
         if (gpio_base1 == NULL) {
@@ -3032,6 +3011,28 @@ static __init int samsung_gpiolib_init(void)
         int i, nr_chips;
         int group = 0;
 
+#ifdef CONFIG_PINCTRL_SAMSUNG
+        /*
+        * This gpio driver includes support for device tree support and there
+        * are platforms using it. In order to maintain compatibility with those
+        * platforms, and to allow non-dt Exynos4210 platforms to use this
+        * gpiolib support, a check is added to find out if there is a active
+        * pin-controller driver support available. If it is available, this
+        * gpiolib support is ignored and the gpiolib support available in
+        * pin-controller driver is used. This is a temporary check and will go
+        * away when all of the Exynos4210 platforms have switched to using
+        * device tree and the pin-ctrl driver.
+        */
+        struct device_node *pctrl_np;
+        static const struct of_device_id exynos_pinctrl_ids[] = {
+                { .compatible = "samsung,pinctrl-exynos4210", },
+                { .compatible = "samsung,pinctrl-exynos4x12", },
+        };
+        for_each_matching_node(pctrl_np, exynos_pinctrl_ids)
+                if (pctrl_np && of_device_is_available(pctrl_np))
+                        return -ENODEV;
+#endif
+
         samsung_gpiolib_set_cfg(samsung_gpio_cfgs, ARRAY_SIZE(samsung_gpio_cfgs));
 
         if (soc_is_s3c24xx()) {
diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c
index 031c6adf5b65..1a3e2b9b4772 100644
--- a/drivers/gpio/gpio-timberdale.c
+++ b/drivers/gpio/gpio-timberdale.c
@@ -116,7 +116,7 @@ static void timbgpio_irq_disable(struct irq_data *d)
         unsigned long flags;
 
         spin_lock_irqsave(&tgpio->lock, flags);
-        tgpio->last_ier &= ~(1 << offset);
+        tgpio->last_ier &= ~(1UL << offset);
         iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER);
         spin_unlock_irqrestore(&tgpio->lock, flags);
 }
@@ -128,7 +128,7 @@ static void timbgpio_irq_enable(struct irq_data *d)
         unsigned long flags;
 
         spin_lock_irqsave(&tgpio->lock, flags);
-        tgpio->last_ier |= 1 << offset;
+        tgpio->last_ier |= 1UL << offset;
         iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER);
         spin_unlock_irqrestore(&tgpio->lock, flags);
 }
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5d6c71edc739..1c8d9e3380e1 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -623,9 +623,11 @@ static ssize_t export_store(struct class *class,
          */
 
         status = gpio_request(gpio, "sysfs");
-        if (status < 0)
+        if (status < 0) {
+                if (status == -EPROBE_DEFER)
+                        status = -ENODEV;
                 goto done;
-
+        }
         status = gpio_export(gpio, true);
         if (status < 0)
                 gpio_free(gpio);
@@ -1191,8 +1193,10 @@ int gpio_request(unsigned gpio, const char *label)
 
         spin_lock_irqsave(&gpio_lock, flags);
 
-        if (!gpio_is_valid(gpio))
+        if (!gpio_is_valid(gpio)) {
+                status = -EINVAL;
                 goto done;
+        }
         desc = &gpio_desc[gpio];
         chip = desc->chip;
         if (chip == NULL)