iio: magnetometer: Add driver support for PNI RM3100

PNI RM3100 is a high resolution, large signal immunity magnetometer,
composed of 3 single sensors and a processing chip with a MagI2C
interface.

Following functions are available:
 - Single-shot measurement from
   /sys/bus/iio/devices/iio:deviceX/in_magn_{axis}_raw
 - Triggerd buffer measurement.
 - DRDY pin for data ready trigger.
 - Both i2c and spi interface are supported.
 - Both interrupt and polling measurement is supported, depends on if
   the 'interrupts' in DT is declared.

Signed-off-by: Song Qiang <songqiang1304521@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
index ed9d776d01af..8a63cbbca4b7 100644
--- a/drivers/iio/magnetometer/Kconfig
+++ b/drivers/iio/magnetometer/Kconfig
@@ -175,4 +175,33 @@ config SENSORS_HMC5843_SPI
 	  - hmc5843_core (core functions)
 	  - hmc5843_spi (support for HMC5983)
 
+config SENSORS_RM3100
+	tristate
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+
+config SENSORS_RM3100_I2C
+	tristate "PNI RM3100 3-Axis Magnetometer (I2C)"
+	depends on I2C
+	select SENSORS_RM3100
+	select REGMAP_I2C
+	help
+	  Say Y here to add support for the PNI RM3100 3-Axis Magnetometer.
+
+	  This driver can also be compiled as a module.
+	  To compile this driver as a module, choose M here: the module
+	  will be called rm3100-i2c.
+
+config SENSORS_RM3100_SPI
+	tristate "PNI RM3100 3-Axis Magnetometer (SPI)"
+	depends on SPI_MASTER
+	select SENSORS_RM3100
+	select REGMAP_SPI
+	help
+	  Say Y here to add support for the PNI RM3100 3-Axis Magnetometer.
+
+	  This driver can also be compiled as a module.
+	  To compile this driver as a module, choose M here: the module
+	  will be called rm3100-spi.
+
 endmenu