Add device tree binding documentation for MAX2175 Rf to bits tuner
device.
Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/media/i2c/max2175.txt | 61 ++++++++++++++++++++++
.../devicetree/bindings/property-units.txt | 1 +
2 files changed, 62 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/max2175.txt
diff --git a/Documentation/devicetree/bindings/media/i2c/max2175.txt b/Documentation/devicetree/bindings/media/i2c/max2175.txt
new file mode 100644
index 0000000..f591ab4
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/max2175.txt
@@ -0,0 +1,61 @@
+Maxim Integrated MAX2175 RF to Bits tuner
+-----------------------------------------
+
+The MAX2175 IC is an advanced analog/digital hybrid-radio receiver with
+RF to Bits® front-end designed for software-defined radio solutions.
+
+Required properties:
+--------------------
+- compatible: "maxim,max2175" for MAX2175 RF-to-bits tuner.
+- clocks: phandle to the fixed xtal clock.
+- clock-names: name of the fixed xtal clock.
+- port: child port node of a tuner that defines the local and remote
+ endpoints. The remote endpoint is assumed to be an SDR device
+ that is capable of receiving the digital samples from the tuner.
+
+Optional properties:
+--------------------
+- maxim,slave : phandle to the master tuner if it is a slave. This
+ is used to define two tuners in diversity mode
+ (1 master, 1 slave). By default each tuner is an
+ individual master.
+- maxim,refout-load-pF: load capacitance value (in pF) on reference
+ output drive level. The possible load values are
+ 0 (default - refout disabled)
+ 10
+ 20
+ 30
+ 40
+ 60
+ 70
+- maxim,am-hiz : empty property indicates AM Hi-Z filter path is
+ selected for AM antenna input. By default this
+ filter path is not used.
+
+Example:
+--------
+
+Board specific DTS file
+
+/* Fixed XTAL clock node */
+maxim_xtal: clock {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <36864000>;
+};
+
+/* A tuner device instance under i2c bus */
+max2175_0: tuner@60 {
+ compatible = "maxim,max2175";
+ reg = <0x60>;
+ clocks = <&maxim_xtal>;
+ clock-names = "xtal";
+ maxim,refout-load-pF = <10>;
+
+ port {
+ max2175_0_ep: endpoint {
+ remote-endpoint = <&slave_rx_device>;
+ };
+ };
+
+};
diff --git a/Documentation/devicetree/bindings/property-units.txt b/Documentation/devicetree/bindings/property-units.txt
index 12278d7..f1f1c22 100644
--- a/Documentation/devicetree/bindings/property-units.txt
+++ b/Documentation/devicetree/bindings/property-units.txt
@@ -28,6 +28,7 @@ Electricity
-ohms : Ohms
-micro-ohms : micro Ohms
-microvolt : micro volts
+-pF : pico farads
Temperature
----------------------------------------
--
1.9.1
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