staging: iio: tsl2583: add of_match table for device tree support

Add device tree support for the tsl2583 IIO driver with no custom
properties.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Documentation/devicetree/bindings/iio/light/tsl2583.txt

+* TAOS TSL 2580/2581/2583 ALS sensor
+
+Required properties:
+
+  - compatible: Should be one of
+		"amstaos,tsl2580"
+		"amstaos,tsl2581"
+		"amstaos,tsl2583"
+  - reg: the I2C address of the device
+
+Optional properties:
+
+  - interrupt-parent: should be the phandle for the interrupt controller
+  - interrupts: the sole interrupt generated by the device
+
+  Refer to interrupt-controller/interrupts.txt for generic interrupt client
+  node bindings.
+
+  - vcc-supply: phandle to the regulator that provides power to the sensor.
+
+Example:
+
+tsl2581@29 {
+	compatible = "amstaos,tsl2581";
+	reg = <0x29>;
+};

drivers/staging/iio/light/tsl2583.c

@@ -947,11 +947,24 @@ static struct i2c_device_id taos_idtable[] = {
 };
 MODULE_DEVICE_TABLE(i2c, taos_idtable);
 
+#ifdef CONFIG_OF
+static const struct of_device_id taos2583_of_match[] = {
+	{ .compatible = "amstaos,tsl2580", },
+	{ .compatible = "amstaos,tsl2581", },
+	{ .compatible = "amstaos,tsl2583", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, taos2583_of_match);
+#else
+#define taos2583_of_match NULL
+#endif
+
 /* Driver definition */
 static struct i2c_driver taos_driver = {
 	.driver = {
 		.name = "tsl2583",
 		.pm = TAOS_PM_OPS,
+		.of_match_table = taos2583_of_match,
 	},
 	.id_table = taos_idtable,
 	.probe = taos_probe,