dt-binding: ptp: add bindings document for dte based ptp clock

Add device tree binding documentation for the Broadcom DTE
PTP clock driver.

Signed-off-by: Arun Parameswaran <arun.parameswaran@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/ptp/brcm,ptp-dte.txt b/Documentation/devicetree/bindings/ptp/brcm,ptp-dte.txt
new file mode 100644 (file)
index 0000000..07590bc
--- /dev/null
+++ b/Documentation/devicetree/bindings/ptp/brcm,ptp-dte.txt
@@ -0,0 +1,13 @@
+* Broadcom Digital Timing Engine(DTE) based PTP clock driver
+
+Required properties:
+- compatible: should be "brcm,ptp-dte"
+- reg: address and length of the DTE block's NCO registers
+
+Example:
+
+ptp_dte: ptp_dte@180af650 {
+       compatible = "brcm,ptp-dte";
+       reg = <0x180af650 0x10>;
+       status = "okay";
+};