iio:ak8975 Add support for gpios DT property

Add support for parsing 'gpios' property when initializing
from oftree.
This patch adds also the binding documentation file.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt
new file mode 100644
index 00000000000..011679f1a42
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt
@@ -0,0 +1,18 @@
+* AsahiKASEI AK8975 magnetometer sensor
+
+Required properties:
+
+  - compatible : should be "asahi-kasei,ak8975"
+  - reg : the I2C address of the magnetometer
+
+Optional properties:
+
+  - gpios : should be device tree identifier of the magnetometer DRDY pin
+
+Example:
+
+ak8975@0c {
+        compatible = "asahi-kasei,ak8975";
+        reg = <0x0c>;
+        gpios = <&gpj0 7 0>;
+};