This adds a callback function to read the current state of a GPIOs
in/out direction.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
---
Cc: barebox@xxxxxxxxxxxxxxxxxxx
---
drivers/gpio/gpio-dw.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpio/gpio-dw.c b/drivers/gpio/gpio-dw.c
index 791488a..6577042 100644
--- a/drivers/gpio/gpio-dw.c
+++ b/drivers/gpio/gpio-dw.c
@@ -90,9 +90,18 @@ static int dw_gpio_direction_output(struct gpio_chip *gc,
return 0;
}
+static int dw_gpio_get_direction(struct gpio_chip *gc, unsigned offset)
+{
+ struct dw_gpio_instance *chip = to_dw_gpio(gc);
+
+ return (readl(chip->regs + DW_GPIO_DDR) & (1 << offset)) ?
+ GPIO_DIR_OUT : GPIO_DIR_IN;
+}
+
static struct gpio_ops imx_gpio_ops = {
.direction_input = dw_gpio_direction_input,
.direction_output = dw_gpio_direction_output,
+ .get_direction = dw_gpio_get_direction,
.get = dw_gpio_get,
.set = dw_gpio_set,
};
--
1.8.4.rc3
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