iio: bmg160: Add SPI driver

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index 94526b1..e816d29 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -56,18 +56,23 @@
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
 	select BMG160_I2C if (I2C)
+	select BMG160_SPI if (SPI)
 	help
 	  Say yes here to build support for BOSCH BMG160 Tri-axis Gyro Sensor
 	  driver connected via I2C or SPI. This driver also supports BMI055
 	  gyroscope.
 
 	  This driver can also be built as a module.  If so, the module
-	  will be called bmg160_i2c.
+	  will be called bmg160_i2c or bmg160_spi.
 
 config BMG160_I2C
 	tristate
 	select REGMAP_I2C
 
+config BMG160_SPI
+	tristate
+	select REGMAP_SPI
+
 config HID_SENSOR_GYRO_3D
 	depends on HID_SENSOR_HUB
 	select IIO_BUFFER