diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-merrifield.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-merrifield.c b/drivers/gpio/gpio-merrifield.c index 82cdcdc779bb..d7cbbc0fc47b 100644 --- a/drivers/gpio/gpio-merrifield.c +++ b/drivers/gpio/gpio-merrifield.c @@ -161,6 +161,27 @@ static int mrfld_gpio_direction_output(struct gpio_chip *chip, return 0; } +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 +405,7 @@ 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.set_debounce = mrfld_gpio_set_debounce; priv->chip.base = gpio_base; priv->chip.ngpio = MRFLD_NGPIO; priv->chip.can_sleep = false; |