iio: sensorhub: Add sensorhub bindings

Add sensorhub bindings for sensorhub on Galaxy Gear 2.

Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iio/sensorhub.txt b/Documentation/devicetree/bindings/iio/sensorhub.txt
new file mode 100644
index 000000000000..8d57571d5c0b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/sensorhub.txt
@@ -0,0 +1,25 @@
+Samsung Sensorhub driver
+
+Sensorhub is a MCU which manages several sensors and also plays the role
+of a virtual sensor device.
+
+Required properties:
+- compatible: "samsung,sensorhub-rinato" or "samsung,sensorhub-thermostat"
+- spi-max-frequency: max SPI clock frequency
+- interrupt-parent: interrupt parent
+- interrupts: communication interrupt
+- ap-mcu-gpios: [out] ap to sensorhub line - used during communication
+- mcu-ap-gpios: [in] sensorhub to ap - used during communication
+- mcu-reset-gpios: [out] sensorhub reset
+
+Example:
+
+        shub_spi: shub {
+                compatible = "samsung,sensorhub-rinato";
+                spi-max-frequency = <5000000>;
+                interrupt-parent = <&gpx0>;
+                interrupts = <2 0>;
+                ap-mcu-gpios = <&gpx0 0 0>;
+                mcu-ap-gpios = <&gpx0 4 0>;
+                mcu-reset-gpios = <&gpx0 5 0>;
+        };