1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c
new file mode 100644
index 000000000..501eff32d
--- /dev/null
+++ b/drivers/iio/magnetometer/st_magn_spi.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics magnetometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/iio/iio.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_spi.h>
+#include "st_magn.h"
+
+/*
+ * For new single-chip sensors use <device_name> as compatible string.
+ * For old single-chip devices keep <device_name>-magn to maintain
+ * compatibility
+ * For multi-chip devices, use <device_name>-magn to distinguish which
+ * capability is being used
+ */
+static const struct of_device_id st_magn_of_match[] = {
+	{
+		.compatible = "st,lis3mdl-magn",
+		.data = LIS3MDL_MAGN_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm303agr-magn",
+		.data = LSM303AGR_MAGN_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis2mdl",
+		.data = LIS2MDL_MAGN_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm9ds1-magn",
+		.data = LSM9DS1_MAGN_DEV_NAME,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, st_magn_of_match);
+
+static int st_magn_spi_probe(struct spi_device *spi)
+{
+	const struct st_sensor_settings *settings;
+	struct st_sensor_data *mdata;
+	struct iio_dev *indio_dev;
+	int err;
+
+	st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
+
+	settings = st_magn_get_settings(spi->modalias);
+	if (!settings) {
+		dev_err(&spi->dev, "device name %s not recognized.\n",
+			spi->modalias);
+		return -ENODEV;
+	}
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	mdata = iio_priv(indio_dev);
+	mdata->sensor_settings = (struct st_sensor_settings *)settings;
+
+	err = st_sensors_spi_configure(indio_dev, spi);
+	if (err < 0)
+		return err;
+
+	err = st_sensors_power_enable(indio_dev);
+	if (err)
+		return err;
+
+	err = st_magn_common_probe(indio_dev);
+	if (err < 0)
+		goto st_magn_power_off;
+
+	return 0;
+
+st_magn_power_off:
+	st_sensors_power_disable(indio_dev);
+
+	return err;
+}
+
+static int st_magn_spi_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+
+	st_magn_common_remove(indio_dev);
+
+	st_sensors_power_disable(indio_dev);
+
+	return 0;
+}
+
+static const struct spi_device_id st_magn_id_table[] = {
+	{ LIS3MDL_MAGN_DEV_NAME },
+	{ LSM303AGR_MAGN_DEV_NAME },
+	{ LIS2MDL_MAGN_DEV_NAME },
+	{ LSM9DS1_MAGN_DEV_NAME },
+	{},
+};
+MODULE_DEVICE_TABLE(spi, st_magn_id_table);
+
+static struct spi_driver st_magn_driver = {
+	.driver = {
+		.name = "st-magn-spi",
+		.of_match_table = st_magn_of_match,
+	},
+	.probe = st_magn_spi_probe,
+	.remove = st_magn_spi_remove,
+	.id_table = st_magn_id_table,
+};
+module_spi_driver(st_magn_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
+MODULE_LICENSE("GPL v2");