Merge tag 'gpio-v4.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Luinus Walleij:
 "Bulk GPIO changes for the v4.10 kernel cycle:

  Core changes:

   - Simplify threaded interrupt handling: instead of passing numbed
     parameters to gpiochip_irqchip_add_chained() we create a new call:
     gpiochip_irqchip_add_nested() so the two types are clearly
     semantically different. Also make sure that all nested chips call
     gpiochip_set_nested_irqchip() which is necessary for IRQ resend to
     work properly if it happens.

   - Return error on seek operations for the chardev.

   - Clamp values set as part of gpio[d]_direction_output() so that
     anything != 0 will be send down to the driver as "1" not the value
     passed in.

   - ACPI can now support naming of GPIO lines, hogs and holes in the
     GPIO lists.

  New drivers:

   - The SX150x driver was deemed unfit for the GPIO subsystem and was
     moved over to a combined GPIO+pinctrl driver in the pinctrl
     subsystem.

  New features:

   - Various cleanups to various drivers"

* tag 'gpio-v4.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (49 commits)
  gpio: merrifield: Implement gpio_get_direction callback
  gpio: merrifield: Add support for hardware debouncer
  gpio: chardev: Return error for seek operations
  gpio: arizona: Tidy up probe error path
  gpio: arizona: Remove pointless set of platform drvdata
  gpio: pl061: delete platform data handling
  gpio: pl061: move platform data into driver
  gpio: pl061: rename variable from chip to pl061
  gpio: pl061: rename state container struct
  gpio: pl061: use local state for parent IRQ storage
  gpio: set explicit nesting on drivers
  gpio: simplify adding threaded interrupts
  gpio: vf610: use builtin_platform_driver
  gpio: axp209: use correct register for GPIO input status
  gpio: stmpe: fix interrupt handling bug
  gpio: em: depnd on ARCH_SHMOBILE
  gpio: zx: depend on ARCH_ZX
  gpio: x86: update config dependencies for x86 specific hardware
  gpio: mb86s7x: use builtin_platform_driver
  gpio: etraxfs: use builtin_platform_driver
  ...

1 files changed, 32 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-merrifield.c b/drivers/gpio/gpio-merrifield.c
index 45b51278b8ee..69e0f4ace465 100644
--- a/drivers/gpio/gpio-merrifield.c
+++ b/drivers/gpio/gpio-merrifield.c
@@ -11,6 +11,7 @@
 
 #include <linux/bitops.h>
 #include <linux/gpio/driver.h>
+#include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -161,6 +162,34 @@ static int mrfld_gpio_direction_output(struct gpio_chip *chip,
 	return 0;
 }
 
+static int mrfld_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+	void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
+
+	return (readl(gpdr) & BIT(offset % 32)) ? GPIOF_DIR_OUT : GPIOF_DIR_IN;
+}
+
+static int mrfld_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
+				   unsigned int debounce)
+{
+	struct mrfld_gpio *priv = gpiochip_get_data(chip);
+	void __iomem *gfbr = gpio_reg(chip, offset, GFBR);
+	unsigned long flags;
+	u32 value;
+
+	raw_spin_lock_irqsave(&priv->lock, flags);
+
+	if (debounce)
+		value = readl(gfbr) & ~BIT(offset % 32);
+	else
+		value = readl(gfbr) | BIT(offset % 32);
+	writel(value, gfbr);
+
+	raw_spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
 static void mrfld_irq_ack(struct irq_data *d)
 {
 	struct mrfld_gpio *priv = irq_data_get_irq_chip_data(d);
@@ -384,6 +413,8 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 	priv->chip.direction_output = mrfld_gpio_direction_output;
 	priv->chip.get = mrfld_gpio_get;
 	priv->chip.set = mrfld_gpio_set;
+	priv->chip.get_direction = mrfld_gpio_get_direction;
+	priv->chip.set_debounce = mrfld_gpio_set_debounce;
 	priv->chip.base = gpio_base;
 	priv->chip.ngpio = MRFLD_NGPIO;
 	priv->chip.can_sleep = false;
@@ -411,7 +442,7 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 	}
 
 	retval = gpiochip_irqchip_add(&priv->chip, &mrfld_irqchip, irq_base,
-				      handle_simple_irq, IRQ_TYPE_NONE);
+				      handle_bad_irq, IRQ_TYPE_NONE);
 	if (retval) {
 		dev_err(&pdev->dev, "could not connect irqchip to gpiochip\n");
 		return retval;