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authorLinus Walleij <linus.walleij@linaro.org>2016-05-01 11:29:10 +0300
committerLinus Walleij <linus.walleij@linaro.org>2016-05-01 11:31:30 +0300
commit3b711e0781f34400326f911c15784e84deca84b6 (patch)
treeca201e67dbbb3f8097fa54eec08999f3b03dbe1b /drivers/gpio
parent0c60de3f73cddde6a83979c64f63cb1101f5326c (diff)
downloadlinux-3b711e0781f34400326f911c15784e84deca84b6.tar.xz
gpio: xgene: implement .get_direction()
This implements the .get_direction() callback for the xgene GPIO controller. Cc: Duc Dang <dhdang@apm.com> Cc: Feng Kan <fkan@apm.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-xgene.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c
index 46faecd1f580..dc85dcd47d19 100644
--- a/drivers/gpio/gpio-xgene.c
+++ b/drivers/gpio/gpio-xgene.c
@@ -85,6 +85,17 @@ static void xgene_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
spin_unlock_irqrestore(&chip->lock, flags);
}
+static int xgene_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+ struct xgene_gpio *chip = gpiochip_get_data(gc);
+ unsigned long bank_offset, bit_offset;
+
+ bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset);
+ bit_offset = GPIO_BIT_OFFSET(offset);
+
+ return !!(ioread32(chip->base + bank_offset) & BIT(bit_offset));
+}
+
static int xgene_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
{
struct xgene_gpio *chip = gpiochip_get_data(gc);
@@ -184,6 +195,7 @@ static int xgene_gpio_probe(struct platform_device *pdev)
spin_lock_init(&gpio->lock);
gpio->chip.parent = &pdev->dev;
+ gpio->chip.get_direction = xgene_gpio_get_direction;
gpio->chip.direction_input = xgene_gpio_dir_in;
gpio->chip.direction_output = xgene_gpio_dir_out;
gpio->chip.get = xgene_gpio_get;