dt-bindings: gnss: add u-blox binding

Add binding for u-blox GNSS receivers.

Note that the u-blox product names encodes form factor (e.g. "neo"),
chipset (e.g. "8") and variant (e.g. "q"), but that only formfactor and
chipset is used for the compatible strings (for now).

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/gnss/u-blox.txt b/Documentation/devicetree/bindings/gnss/u-blox.txt
new file mode 100644 (file)
index 0000000..e475659
--- /dev/null
+++ b/Documentation/devicetree/bindings/gnss/u-blox.txt
@@ -0,0 +1,44 @@
+u-blox GNSS Receiver DT binding
+
+The u-blox GNSS receivers can use UART, DDC (I2C), SPI and USB interfaces.
+
+Please see Documentation/devicetree/bindings/gnss/gnss.txt for generic
+properties.
+
+Required properties:
+
+- compatible   : Must be one of
+
+                       "u-blox,neo-8"
+                       "u-blox,neo-m8"
+
+- vcc-supply   : Main voltage regulator
+
+Required properties (DDC):
+- reg          : DDC (I2C) slave address
+
+Required properties (SPI):
+- reg          : SPI chip select address
+
+Required properties (USB):
+- reg          : Number of the USB hub port or the USB host-controller port
+                  to which this device is attached
+
+Optional properties:
+
+- timepulse-gpios      : Time pulse GPIO
+- u-blox,extint-gpios  : GPIO connected to the "external interrupt" input pin
+- v-bckp-supply        : Backup voltage regulator
+
+Example:
+
+serial@1234 {
+       compatible = "ns16550a";
+
+       gnss {
+               compatible = "u-blox,neo-8";
+
+               v-bckp-supply = <&gnss_v_bckp_reg>;
+               vcc-supply = <&gnss_vcc_reg>;
+       };
+};

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 7cad066..4f61ca1 100644 (file)
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -384,6 +384,7 @@ tronsmart   Tronsmart
 truly  Truly Semiconductors Limited
 tsd    Theobroma Systems Design und Consulting GmbH
 tyan   Tyan Computer Corporation
+u-blox u-blox
 ucrobotics     uCRobotics
 ubnt   Ubiquiti Networks
 udoo   Udoo