Merge remote-tracking branch 'linus/master' into staging/for_v3.8

* linus/master: (1428 commits)
  futex: avoid wake_futex() for a PI futex_q
  watchdog: using u64 in get_sample_period()
  writeback: put unused inodes to LRU after writeback completion
  mm: vmscan: check for fatal signals iff the process was throttled
  Revert "mm: remove __GFP_NO_KSWAPD"
  proc: check vma->vm_file before dereferencing
  UAPI: strip the _UAPI prefix from header guards during header installation
  include/linux/bug.h: fix sparse warning related to BUILD_BUG_ON_INVALID
  Linux 3.7-rc7
  powerpc/eeh: Do not invalidate PE properly
  ALSA: hda - Fix build without CONFIG_PM
  of/address: sparc: Declare of_iomap as an extern function for sparc again
  PM / QoS: fix wrong error-checking condition
  bnx2x: remove redundant warning log
  vxlan: fix command usage in its doc
  8139cp: revert "set ring address before enabling receiver"
  MPI: Fix compilation on MIPS with GCC 4.4 and newer
  MIPS: Fix crash that occurs when function tracing is enabled
  MIPS: Merge overlapping bootmem ranges
  jbd: Fix lock ordering bug in journal_unmap_buffer()
  ...

1 files changed, 35 insertions, 0 deletions

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 */