[PATCH 2/2] Documentation: devicetree: Add bindings for Wi2Wi w2sg0004 gps

[Marek Belisko]

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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