[PATCH 4/4] gpiolib: implement gpiod_get_value

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

The gpiod_ family of kernel functions always assume the logical state
for values (i.e. taking active low/high into account). We already have
gpio_set_value, so add gpiod_get_value for symmetry.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 include/gpiod.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/gpiod.h b/include/gpiod.h
index f76cc98155e0..8abf86db8682 100644
--- a/include/gpiod.h
+++ b/include/gpiod.h
@@ -63,4 +63,12 @@ static inline void gpiod_set_value(int gpio, bool value)
 		gpio_direction_active(gpio, value);
 }
 
+static inline int gpiod_get_value(int gpio)
+{
+	if (gpio < 0)
+		return gpio;
+
+	return gpio_is_active(gpio);
+}
+
 #endif
-- 
2.30.2