iio:as3935: Add DT binding docs for AS3935 driver

Document compatible string, required and optional DT properties for
AS3935 chipset driver.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/Documentation/devicetree/bindings/iio/proximity/as3935.txt b/Documentation/devicetree/bindings/iio/proximity/as3935.txt
new file mode 100644 (file)
index 0000000..ae23dd8
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/proximity/as3935.txt
@@ -0,0 +1,28 @@
+Austrian Microsystems AS3935 Franklin lightning sensor device driver
+
+Required properties:
+       - compatible: must be "ams,as3935"
+       - reg: SPI chip select number for the device
+       - spi-cpha: SPI Mode 1. Refer to spi/spi-bus.txt for generic SPI
+       slave node bindings.
+       - interrupt-parent : should be the phandle for the interrupt controller
+       - interrupts : the sole interrupt generated by the device
+
+       Refer to interrupt-controller/interrupts.txt for generic
+       interrupt client node bindings.
+
+Optional properties:
+       - ams,tuning-capacitor-pf: Calibration tuning capacitor stepping
+         value 0 - 120pF. This will require using the calibration data from
+         the manufacturer.
+
+Example:
+
+as3935@0 {
+       compatible = "ams,as3935";
+       reg = <0>;
+       spi-cpha;
+       interrupt-parent = <&gpio1>;
+       interrupts = <16 1>;
+       ams,tuning-capacitor-pf = <80>;
+};

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 40ce2df0e0e95add31ca573c65fc48227e2c1739..2025cee4b6b29a5fd8019beec41f45a01252dc3e 100644 (file)
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -11,6 +11,7 @@ ak    Asahi Kasei Corp.
 allwinner      Allwinner Technology Co., Ltd.
 altr   Altera Corp.
 amcc   Applied Micro Circuits Corporation (APM, formally AMCC)
+ams    AMS AG
 amstaos        AMS-Taos Inc.
 apm    Applied Micro Circuits Corporation (APM)
 arm    ARM Ltd.