Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (40 commits)
  mfd: Fix incorrect kfree(i2c) in wm8994-core i2c_driver probe
  mfd: Fix incorrect kfree(i2c) in wm831x-core i2c_driver probe
  mfd: Fix incorrect kfree(i2c) in tps6507x i2c_driver probe
  mfd: Add TPS6586x driver
  mfd: Use macros instead of some constant magic numbers for menelaus
  mfd: Fix menelaus mmc slot 2 misconfiguration
  mfd: Missing slab.h includes
  mfd: Fix wrong wm8350-core kfree in error path
  mfd: Fix wm8994_device_init() return value
  mfd: Avoid calling platform_device_put() twice in ucb1400 probe error path
  mfd: Annotate tc6387xb probe/remove routines with __devinit/__devexit
  mfd: Fix tc6387xb resource reclaim
  mfd: Fix wrong goto labels for tc6393xb error handling
  mfd: Get rid of now unused mc13783 private header
  hwmon: Don't access struct mc13783 directly from mc13783-adc
  mfd: New mc13783 function exposing flags
  mfd: Check jz4740-adc kmalloc() result
  mfd: Fix jz4740-adc resource reclaim in probe error path
  mfd: Add WM8321 support
  mfd: Add stmpe auto sleep feature
  ...

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/gpio/wm831x-gpio.c b/drivers/gpio/wm831x-gpio.c
index 1fa449a1a4cb..309644cf4d9b 100644
--- a/drivers/gpio/wm831x-gpio.c
+++ b/drivers/gpio/wm831x-gpio.c
@@ -108,6 +108,37 @@ static int wm831x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
         return wm831x->irq_base + WM831X_IRQ_GPIO_1 + offset;
 }
 
+static int wm831x_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
+                                    unsigned debounce)
+{
+        struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip);
+        struct wm831x *wm831x = wm831x_gpio->wm831x;
+        int reg = WM831X_GPIO1_CONTROL + offset;
+        int ret, fn;
+
+        ret = wm831x_reg_read(wm831x, reg);
+        if (ret < 0)
+                return ret;
+
+        switch (ret & WM831X_GPN_FN_MASK) {
+        case 0:
+        case 1:
+                break;
+        default:
+                /* Not in GPIO mode */
+                return -EBUSY;
+        }
+
+        if (debounce >= 32 && debounce <= 64)
+                fn = 0;
+        else if (debounce >= 4000 && debounce <= 8000)
+                fn = 1;
+        else
+                return -EINVAL;
+
+        return wm831x_set_bits(wm831x, reg, WM831X_GPN_FN_MASK, fn);
+}
+
 #ifdef CONFIG_DEBUG_FS
 static void wm831x_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {
@@ -208,6 +239,7 @@ static struct gpio_chip template_chip = {
         .direction_output       = wm831x_gpio_direction_out,
         .set                    = wm831x_gpio_set,
         .to_irq                 = wm831x_gpio_to_irq,
+        .set_debounce           = wm831x_gpio_set_debounce,
         .dbg_show               = wm831x_gpio_dbg_show,
         .can_sleep              = 1,
 };