Add documentation for Milbeaut Updown Counter device
quadrature encoder and counter binding.
Signed-off-by: Shinji Kanematsu <kanematsu.shinji@xxxxxxxxxxxxx>
---
.../bindings/iio/counter/milbeaut-updown_cnt.txt | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/counter/milbeaut-updown_cnt.txt
diff --git a/Documentation/devicetree/bindings/iio/counter/milbeaut-updown_cnt.txt b/Documentation/devicetree/bindings/iio/counter/milbeaut-updown_cnt.txt
new file mode 100644
index 0000000..6771567
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/counter/milbeaut-updown_cnt.txt
@@ -0,0 +1,22 @@
+SOCIONEXT Milbeaut Updown counter
+
+Required properties:
+- compatible: Must be "socionext,milbeaut-updown-counter".
+- reg: Offset and length of the device's register set.
+- clocks: Phandle to the clock used by the Updown counter module.
+- clock-names: Must be "mux".
+- interrupts: SPI number of the device's set.
+- cms_type: connected_device
+ 1: updown button (updown counter mode)
+ 2: rotary encoder (phase difference counter mode)
+
+Example:
+
+ updown0: updown@1e002000 {
+ compatible = "socionext,milbeaut-updown-counter";
+ reg = <0x1e002000 0x20>;
+ clocks = <&clk 4>;
+ clock-names = "mux";
+ interrupts = <0 104 0x4>;
+ cms_type = <1>;
+ };
--
1.9.1
