devicetree: add device tree bindings for cc2520 driver

DT bindings for cc2520 radio driver

Signed-off-by: Varka Bhadram <varkab@cdac.in>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/ieee802154/cc2520.txt b/Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
new file mode 100644 (file)
index 0000000..0071883
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
@@ -0,0 +1,29 @@
+*CC2520 IEEE 802.15.4 Compatible Radio*
+
+Required properties:
+       - compatible:           should be "ti,cc2520"
+       - spi-max-frequency:    maximal bus speed (8000000), should be set to 4000000 depends
+                               sync or async operation mode
+       - reg:                  the chipselect index
+       - pinctrl-0:            pin control group to be used for this controller.
+       - pinctrl-names:        must contain a "default" entry.
+       - fifo-gpio:            GPIO spec for the FIFO pin
+       - fifop-gpio:           GPIO spec for the FIFOP pin
+       - sfd-gpio:             GPIO spec for the SFD pin
+       - cca-gpio:             GPIO spec for the CCA pin
+       - vreg-gpio:            GPIO spec for the VREG pin
+       - reset-gpio:           GPIO spec for the RESET pin
+Example:
+       cc2520@0 {
+               compatible = "ti,cc2520";
+               reg = <0>;
+               spi-max-frequency = <4000000>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&cc2520_cape_pins>;
+               fifo-gpio = <&gpio1 18 0>;
+               fifop-gpio = <&gpio1 19 0>;
+               sfd-gpio = <&gpio1 13 0>;
+               cca-gpio = <&gpio1 16 0>;
+               vreg-gpio = <&gpio0 31 0>;
+               reset-gpio = <&gpio1 12 0>;
+       };