Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
Signed-off-by: Marek Belisko <marek@xxxxxxxxxxxxx>
---
.../devicetree/bindings/misc/wi2wi,w2sg0004.txt | 44 ++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt
diff --git a/Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt b/Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt
new file mode 100644
index 0000000..e144441
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/wi2wi,w2sg0004.txt
@@ -0,0 +1,44 @@
+Wi2Wi GPS module connected through UART
+
+Required properties:
+- compatible: wi2wi,w2sg0004 or wi2wi,w2sg0084
+- pinctrl: specify two states (default and monitor). One is the default (UART) mode
+ and the other is for monitoring the RX line by an interrupt
+- on-off-gpio: the GPIO that controls the module's on-off toggle input
+
+Optional properties:
+- lna-suppy: an (optional) LNA regulator that is enabled together with the GPS receiver
+
+example:
+
+ gps_receiver: w2sg0004 {
+ compatible = "wi2wi,w2sg0004";
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ pinctrl-names = "default", "monitor";
+ pinctrl-0 = <&uart2_pins>;
+ pinctrl-1 = <&uart2_rx_irq_pins>;
+
+ interrupt-parent = <&gpio5>;
+ interrupts = <19 IRQ_TYPE_EDGE_FALLING>; /* GPIO_147: RX - trigger on arrival of start bit */
+ lna-supply = <&vsim>; /* LNA regulator */
+ on-off-gpio = <&gpio5 17 0>; /* GPIO_145: trigger for turning on/off w2sg0004 */
+
+&pinmux {
+
+ uart2_pins: pinmux_uart2_pins {
+ pinctrl-single,pins = <
+ 0x14a (PIN_INPUT | MUX_MODE0) /* uart2_tx.uart2_rx */
+ 0x148 (PIN_OUTPUT | MUX_MODE0) /* uart2_tx.uart2_tx */
+ >;
+ };
+
+ uart2_rx_irq_pins: pinmux_uart2_rx_irq_pins {
+ pinctrl-single,pins = <
+ /* switch RX to GPIO so that we can get interrupts by the start bit */
+ 0x14a (PIN_INPUT | MUX_MODE4) /* uart2_tx.uart2_rx */
+ >;
+ };
+
+}
--
1.9.1
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