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-rw-r--r--drivers/iio/magnetometer/Kconfig72
-rw-r--r--drivers/iio/magnetometer/Makefile15
-rw-r--r--drivers/iio/magnetometer/ak8975.c631
-rw-r--r--drivers/iio/magnetometer/hid-sensor-magn-3d.c433
-rw-r--r--drivers/iio/magnetometer/mag3110.c438
-rw-r--r--drivers/iio/magnetometer/st_magn.h46
-rw-r--r--drivers/iio/magnetometer/st_magn_buffer.c89
-rw-r--r--drivers/iio/magnetometer/st_magn_core.c423
-rw-r--r--drivers/iio/magnetometer/st_magn_i2c.c73
-rw-r--r--drivers/iio/magnetometer/st_magn_spi.c72
10 files changed, 2292 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
new file mode 100644
index 00000000000..05a364c543f
--- /dev/null
+++ b/drivers/iio/magnetometer/Kconfig
@@ -0,0 +1,72 @@
+#
+# Magnetometer sensors
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Magnetometer sensors"
+
+config AK8975
+ tristate "Asahi Kasei AK8975 3-Axis Magnetometer"
+ depends on I2C
+ depends on GPIOLIB
+ help
+ Say yes here to build support for Asahi Kasei AK8975 3-Axis
+ Magnetometer. This driver can also support AK8963, if i2c
+ device name is identified as ak8963.
+
+ To compile this driver as a module, choose M here: the module
+ will be called ak8975.
+
+config MAG3110
+ tristate "Freescale MAG3110 3-Axis Magnetometer"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say yes here to build support for the Freescale MAG3110 3-Axis
+ magnetometer.
+
+ To compile this driver as a module, choose M here: the module
+ will be called mag3110.
+
+config HID_SENSOR_MAGNETOMETER_3D
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID Magenetometer 3D"
+ help
+ Say yes here to build support for the HID SENSOR
+ Magnetometer 3D.
+
+config IIO_ST_MAGN_3AXIS
+ tristate "STMicroelectronics magnetometers 3-Axis Driver"
+ depends on (I2C || SPI_MASTER) && SYSFS
+ select IIO_ST_SENSORS_CORE
+ select IIO_ST_MAGN_I2C_3AXIS if (I2C)
+ select IIO_ST_MAGN_SPI_3AXIS if (SPI_MASTER)
+ select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
+ help
+ Say yes here to build support for STMicroelectronics magnetometers:
+ LSM303DLHC, LSM303DLM, LIS3MDL.
+
+ This driver can also be built as a module. If so, these modules
+ will be created:
+ - st_magn (core functions for the driver [it is mandatory]);
+ - st_magn_i2c (necessary for the I2C devices [optional*]);
+ - st_magn_spi (necessary for the SPI devices [optional*]);
+
+ (*) one of these is necessary to do something.
+
+config IIO_ST_MAGN_I2C_3AXIS
+ tristate
+ depends on IIO_ST_MAGN_3AXIS
+ depends on IIO_ST_SENSORS_I2C
+
+config IIO_ST_MAGN_SPI_3AXIS
+ tristate
+ depends on IIO_ST_MAGN_3AXIS
+ depends on IIO_ST_SENSORS_SPI
+
+endmenu
diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile
new file mode 100644
index 00000000000..0f5d3c98579
--- /dev/null
+++ b/drivers/iio/magnetometer/Makefile
@@ -0,0 +1,15 @@
+#
+# Makefile for industrial I/O Magnetometer sensor drivers
+#
+
+# When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_AK8975) += ak8975.o
+obj-$(CONFIG_MAG3110) += mag3110.o
+obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o
+
+obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn.o
+st_magn-y := st_magn_core.o
+st_magn-$(CONFIG_IIO_BUFFER) += st_magn_buffer.o
+
+obj-$(CONFIG_IIO_ST_MAGN_I2C_3AXIS) += st_magn_i2c.o
+obj-$(CONFIG_IIO_ST_MAGN_SPI_3AXIS) += st_magn_spi.o
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
new file mode 100644
index 00000000000..ea08313af0d
--- /dev/null
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -0,0 +1,631 @@
+/*
+ * A sensor driver for the magnetometer AK8975.
+ *
+ * Magnetic compass sensor driver for monitoring magnetic flux information.
+ *
+ * Copyright (c) 2010, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/acpi.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+/*
+ * Register definitions, as well as various shifts and masks to get at the
+ * individual fields of the registers.
+ */
+#define AK8975_REG_WIA 0x00
+#define AK8975_DEVICE_ID 0x48
+
+#define AK8975_REG_INFO 0x01
+
+#define AK8975_REG_ST1 0x02
+#define AK8975_REG_ST1_DRDY_SHIFT 0
+#define AK8975_REG_ST1_DRDY_MASK (1 << AK8975_REG_ST1_DRDY_SHIFT)
+
+#define AK8975_REG_HXL 0x03
+#define AK8975_REG_HXH 0x04
+#define AK8975_REG_HYL 0x05
+#define AK8975_REG_HYH 0x06
+#define AK8975_REG_HZL 0x07
+#define AK8975_REG_HZH 0x08
+#define AK8975_REG_ST2 0x09
+#define AK8975_REG_ST2_DERR_SHIFT 2
+#define AK8975_REG_ST2_DERR_MASK (1 << AK8975_REG_ST2_DERR_SHIFT)
+
+#define AK8975_REG_ST2_HOFL_SHIFT 3
+#define AK8975_REG_ST2_HOFL_MASK (1 << AK8975_REG_ST2_HOFL_SHIFT)
+
+#define AK8975_REG_CNTL 0x0A
+#define AK8975_REG_CNTL_MODE_SHIFT 0
+#define AK8975_REG_CNTL_MODE_MASK (0xF << AK8975_REG_CNTL_MODE_SHIFT)
+#define AK8975_REG_CNTL_MODE_POWER_DOWN 0
+#define AK8975_REG_CNTL_MODE_ONCE 1
+#define AK8975_REG_CNTL_MODE_SELF_TEST 8
+#define AK8975_REG_CNTL_MODE_FUSE_ROM 0xF
+
+#define AK8975_REG_RSVC 0x0B
+#define AK8975_REG_ASTC 0x0C
+#define AK8975_REG_TS1 0x0D
+#define AK8975_REG_TS2 0x0E
+#define AK8975_REG_I2CDIS 0x0F
+#define AK8975_REG_ASAX 0x10
+#define AK8975_REG_ASAY 0x11
+#define AK8975_REG_ASAZ 0x12
+
+#define AK8975_MAX_REGS AK8975_REG_ASAZ
+
+/*
+ * Miscellaneous values.
+ */
+#define AK8975_MAX_CONVERSION_TIMEOUT 500
+#define AK8975_CONVERSION_DONE_POLL_TIME 10
+#define AK8975_DATA_READY_TIMEOUT ((100*HZ)/1000)
+#define RAW_TO_GAUSS_8975(asa) ((((asa) + 128) * 3000) / 256)
+#define RAW_TO_GAUSS_8963(asa) ((((asa) + 128) * 6000) / 256)
+
+/* Compatible Asahi Kasei Compass parts */
+enum asahi_compass_chipset {
+ AK8975,
+ AK8963,
+};
+
+/*
+ * Per-instance context data for the device.
+ */
+struct ak8975_data {
+ struct i2c_client *client;
+ struct attribute_group attrs;
+ struct mutex lock;
+ u8 asa[3];
+ long raw_to_gauss[3];
+ u8 reg_cache[AK8975_MAX_REGS];
+ int eoc_gpio;
+ int eoc_irq;
+ wait_queue_head_t data_ready_queue;
+ unsigned long flags;
+ enum asahi_compass_chipset chipset;
+};
+
+static const int ak8975_index_to_reg[] = {
+ AK8975_REG_HXL, AK8975_REG_HYL, AK8975_REG_HZL,
+};
+
+/*
+ * Helper function to write to the I2C device's registers.
+ */
+static int ak8975_write_data(struct i2c_client *client,
+ u8 reg, u8 val, u8 mask, u8 shift)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct ak8975_data *data = iio_priv(indio_dev);
+ u8 regval;
+ int ret;
+
+ regval = (data->reg_cache[reg] & ~mask) | (val << shift);
+ ret = i2c_smbus_write_byte_data(client, reg, regval);
+ if (ret < 0) {
+ dev_err(&client->dev, "Write to device fails status %x\n", ret);
+ return ret;
+ }
+ data->reg_cache[reg] = regval;
+
+ return 0;
+}
+
+/*
+ * Handle data ready irq
+ */
+static irqreturn_t ak8975_irq_handler(int irq, void *data)
+{
+ struct ak8975_data *ak8975 = data;
+
+ set_bit(0, &ak8975->flags);
+ wake_up(&ak8975->data_ready_queue);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Install data ready interrupt handler
+ */
+static int ak8975_setup_irq(struct ak8975_data *data)
+{
+ struct i2c_client *client = data->client;
+ int rc;
+ int irq;
+
+ if (client->irq)
+ irq = client->irq;
+ else
+ irq = gpio_to_irq(data->eoc_gpio);
+
+ rc = request_irq(irq, ak8975_irq_handler,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ dev_name(&client->dev), data);
+ if (rc < 0) {
+ dev_err(&client->dev,
+ "irq %d request failed, (gpio %d): %d\n",
+ irq, data->eoc_gpio, rc);
+ return rc;
+ }
+
+ init_waitqueue_head(&data->data_ready_queue);
+ clear_bit(0, &data->flags);
+ data->eoc_irq = irq;
+
+ return rc;
+}
+
+
+/*
+ * Perform some start-of-day setup, including reading the asa calibration
+ * values and caching them.
+ */
+static int ak8975_setup(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct ak8975_data *data = iio_priv(indio_dev);
+ u8 device_id;
+ int ret;
+
+ /* Confirm that the device we're talking to is really an AK8975. */
+ ret = i2c_smbus_read_byte_data(client, AK8975_REG_WIA);
+ if (ret < 0) {
+ dev_err(&client->dev, "Error reading WIA\n");
+ return ret;
+ }
+ device_id = ret;
+ if (device_id != AK8975_DEVICE_ID) {
+ dev_err(&client->dev, "Device ak8975 not found\n");
+ return -ENODEV;
+ }
+
+ /* Write the fused rom access mode. */
+ ret = ak8975_write_data(client,
+ AK8975_REG_CNTL,
+ AK8975_REG_CNTL_MODE_FUSE_ROM,
+ AK8975_REG_CNTL_MODE_MASK,
+ AK8975_REG_CNTL_MODE_SHIFT);
+ if (ret < 0) {
+ dev_err(&client->dev, "Error in setting fuse access mode\n");
+ return ret;
+ }
+
+ /* Get asa data and store in the device data. */
+ ret = i2c_smbus_read_i2c_block_data(client, AK8975_REG_ASAX,
+ 3, data->asa);
+ if (ret < 0) {
+ dev_err(&client->dev, "Not able to read asa data\n");
+ return ret;
+ }
+
+ /* After reading fuse ROM data set power-down mode */
+ ret = ak8975_write_data(client,
+ AK8975_REG_CNTL,
+ AK8975_REG_CNTL_MODE_POWER_DOWN,
+ AK8975_REG_CNTL_MODE_MASK,
+ AK8975_REG_CNTL_MODE_SHIFT);
+
+ if (data->eoc_gpio > 0 || client->irq) {
+ ret = ak8975_setup_irq(data);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "Error setting data ready interrupt\n");
+ return ret;
+ }
+ }
+
+ if (ret < 0) {
+ dev_err(&client->dev, "Error in setting power-down mode\n");
+ return ret;
+ }
+
+/*
+ * Precalculate scale factor (in Gauss units) for each axis and
+ * store in the device data.
+ *
+ * This scale factor is axis-dependent, and is derived from 3 calibration
+ * factors ASA(x), ASA(y), and ASA(z).
+ *
+ * These ASA values are read from the sensor device at start of day, and
+ * cached in the device context struct.
+ *
+ * Adjusting the flux value with the sensitivity adjustment value should be
+ * done via the following formula:
+ *
+ * Hadj = H * ( ( ( (ASA-128)*0.5 ) / 128 ) + 1 )
+ *
+ * where H is the raw value, ASA is the sensitivity adjustment, and Hadj
+ * is the resultant adjusted value.
+ *
+ * We reduce the formula to:
+ *
+ * Hadj = H * (ASA + 128) / 256
+ *
+ * H is in the range of -4096 to 4095. The magnetometer has a range of
+ * +-1229uT. To go from the raw value to uT is:
+ *
+ * HuT = H * 1229/4096, or roughly, 3/10.
+ *
+ * Since 1uT = 0.01 gauss, our final scale factor becomes:
+ *
+ * Hadj = H * ((ASA + 128) / 256) * 3/10 * 1/100
+ * Hadj = H * ((ASA + 128) * 0.003) / 256
+ *
+ * Since ASA doesn't change, we cache the resultant scale factor into the
+ * device context in ak8975_setup().
+ */
+ if (data->chipset == AK8963) {
+ /*
+ * H range is +-8190 and magnetometer range is +-4912.
+ * So HuT using the above explanation for 8975,
+ * 4912/8190 = ~ 6/10.
+ * So the Hadj should use 6/10 instead of 3/10.
+ */
+ data->raw_to_gauss[0] = RAW_TO_GAUSS_8963(data->asa[0]);
+ data->raw_to_gauss[1] = RAW_TO_GAUSS_8963(data->asa[1]);
+ data->raw_to_gauss[2] = RAW_TO_GAUSS_8963(data->asa[2]);
+ } else {
+ data->raw_to_gauss[0] = RAW_TO_GAUSS_8975(data->asa[0]);
+ data->raw_to_gauss[1] = RAW_TO_GAUSS_8975(data->asa[1]);
+ data->raw_to_gauss[2] = RAW_TO_GAUSS_8975(data->asa[2]);
+ }
+
+ return 0;
+}
+
+static int wait_conversion_complete_gpio(struct ak8975_data *data)
+{
+ struct i2c_client *client = data->client;
+ u32 timeout_ms = AK8975_MAX_CONVERSION_TIMEOUT;
+ int ret;
+
+ /* Wait for the conversion to complete. */
+ while (timeout_ms) {
+ msleep(AK8975_CONVERSION_DONE_POLL_TIME);
+ if (gpio_get_value(data->eoc_gpio))
+ break;
+ timeout_ms -= AK8975_CONVERSION_DONE_POLL_TIME;
+ }
+ if (!timeout_ms) {
+ dev_err(&client->dev, "Conversion timeout happened\n");
+ return -EINVAL;
+ }
+
+ ret = i2c_smbus_read_byte_data(client, AK8975_REG_ST1);
+ if (ret < 0)
+ dev_err(&client->dev, "Error in reading ST1\n");
+
+ return ret;
+}
+
+static int wait_conversion_complete_polled(struct ak8975_data *data)
+{
+ struct i2c_client *client = data->client;
+ u8 read_status;
+ u32 timeout_ms = AK8975_MAX_CONVERSION_TIMEOUT;
+ int ret;
+
+ /* Wait for the conversion to complete. */
+ while (timeout_ms) {
+ msleep(AK8975_CONVERSION_DONE_POLL_TIME);
+ ret = i2c_smbus_read_byte_data(client, AK8975_REG_ST1);
+ if (ret < 0) {
+ dev_err(&client->dev, "Error in reading ST1\n");
+ return ret;
+ }
+ read_status = ret;
+ if (read_status)
+ break;
+ timeout_ms -= AK8975_CONVERSION_DONE_POLL_TIME;
+ }
+ if (!timeout_ms) {
+ dev_err(&client->dev, "Conversion timeout happened\n");
+ return -EINVAL;
+ }
+
+ return read_status;
+}
+
+/* Returns 0 if the end of conversion interrupt occured or -ETIME otherwise */
+static int wait_conversion_complete_interrupt(struct ak8975_data *data)
+{
+ int ret;
+
+ ret = wait_event_timeout(data->data_ready_queue,
+ test_bit(0, &data->flags),
+ AK8975_DATA_READY_TIMEOUT);
+ clear_bit(0, &data->flags);
+
+ return ret > 0 ? 0 : -ETIME;
+}
+
+/*
+ * Emits the raw flux value for the x, y, or z axis.
+ */
+static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val)
+{
+ struct ak8975_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+ int ret;
+
+ mutex_lock(&data->lock);
+
+ /* Set up the device for taking a sample. */
+ ret = ak8975_write_data(client,
+ AK8975_REG_CNTL,
+ AK8975_REG_CNTL_MODE_ONCE,
+ AK8975_REG_CNTL_MODE_MASK,
+ AK8975_REG_CNTL_MODE_SHIFT);
+ if (ret < 0) {
+ dev_err(&client->dev, "Error in setting operating mode\n");
+ goto exit;
+ }
+
+ /* Wait for the conversion to complete. */
+ if (data->eoc_irq)
+ ret = wait_conversion_complete_interrupt(data);
+ else if (gpio_is_valid(data->eoc_gpio))
+ ret = wait_conversion_complete_gpio(data);
+ else
+ ret = wait_conversion_complete_polled(data);
+ if (ret < 0)
+ goto exit;
+
+ /* This will be executed only for non-interrupt based waiting case */
+ if (ret & AK8975_REG_ST1_DRDY_MASK) {
+ ret = i2c_smbus_read_byte_data(client, AK8975_REG_ST2);
+ if (ret < 0) {
+ dev_err(&client->dev, "Error in reading ST2\n");
+ goto exit;
+ }
+ if (ret & (AK8975_REG_ST2_DERR_MASK |
+ AK8975_REG_ST2_HOFL_MASK)) {
+ dev_err(&client->dev, "ST2 status error 0x%x\n", ret);
+ ret = -EINVAL;
+ goto exit;
+ }
+ }
+
+ /* Read the flux value from the appropriate register
+ (the register is specified in the iio device attributes). */
+ ret = i2c_smbus_read_word_data(client, ak8975_index_to_reg[index]);
+ if (ret < 0) {
+ dev_err(&client->dev, "Read axis data fails\n");
+ goto exit;
+ }
+
+ mutex_unlock(&data->lock);
+
+ /* Clamp to valid range. */
+ *val = clamp_t(s16, ret, -4096, 4095);
+ return IIO_VAL_INT;
+
+exit:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int ak8975_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct ak8975_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ return ak8975_read_axis(indio_dev, chan->address, val);
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = data->raw_to_gauss[chan->address];
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+#define AK8975_CHANNEL(axis, index) \
+ { \
+ .type = IIO_MAGN, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .address = index, \
+ }
+
+static const struct iio_chan_spec ak8975_channels[] = {
+ AK8975_CHANNEL(X, 0), AK8975_CHANNEL(Y, 1), AK8975_CHANNEL(Z, 2),
+};
+
+static const struct iio_info ak8975_info = {
+ .read_raw = &ak8975_read_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static const struct acpi_device_id ak_acpi_match[] = {
+ {"AK8975", AK8975},
+ {"AK8963", AK8963},
+ {"INVN6500", AK8963},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, ak_acpi_match);
+
+static char *ak8975_match_acpi_device(struct device *dev,
+ enum asahi_compass_chipset *chipset)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+ *chipset = (int)id->driver_data;
+
+ return (char *)dev_name(dev);
+}
+
+static int ak8975_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ak8975_data *data;
+ struct iio_dev *indio_dev;
+ int eoc_gpio;
+ int err;
+ char *name = NULL;
+
+ /* Grab and set up the supplied GPIO. */
+ if (client->dev.platform_data)
+ eoc_gpio = *(int *)(client->dev.platform_data);
+ else if (client->dev.of_node)
+ eoc_gpio = of_get_gpio(client->dev.of_node, 0);
+ else
+ eoc_gpio = -1;
+
+ if (eoc_gpio == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ /* We may not have a GPIO based IRQ to scan, that is fine, we will
+ poll if so */
+ if (gpio_is_valid(eoc_gpio)) {
+ err = gpio_request_one(eoc_gpio, GPIOF_IN, "ak_8975");
+ if (err < 0) {
+ dev_err(&client->dev,
+ "failed to request GPIO %d, error %d\n",
+ eoc_gpio, err);
+ goto exit;
+ }
+ }
+
+ /* Register with IIO */
+ indio_dev = iio_device_alloc(sizeof(*data));
+ if (indio_dev == NULL) {
+ err = -ENOMEM;
+ goto exit_gpio;
+ }
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+
+ data->client = client;
+ data->eoc_gpio = eoc_gpio;
+ data->eoc_irq = 0;
+
+ /* id will be NULL when enumerated via ACPI */
+ if (id) {
+ data->chipset =
+ (enum asahi_compass_chipset)(id->driver_data);
+ name = (char *) id->name;
+ } else if (ACPI_HANDLE(&client->dev))
+ name = ak8975_match_acpi_device(&client->dev, &data->chipset);
+ else {
+ err = -ENOSYS;
+ goto exit_free_iio;
+ }
+ dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
+
+ /* Perform some basic start-of-day setup of the device. */
+ err = ak8975_setup(client);
+ if (err < 0) {
+ dev_err(&client->dev, "AK8975 initialization fails\n");
+ goto exit_free_iio;
+ }
+
+ data->client = client;
+ mutex_init(&data->lock);
+ data->eoc_gpio = eoc_gpio;
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = ak8975_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ak8975_channels);
+ indio_dev->info = &ak8975_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->name = name;
+ err = iio_device_register(indio_dev);
+ if (err < 0)
+ goto exit_free_iio;
+
+ return 0;
+
+exit_free_iio:
+ iio_device_free(indio_dev);
+ if (data->eoc_irq)
+ free_irq(data->eoc_irq, data);
+exit_gpio:
+ if (gpio_is_valid(eoc_gpio))
+ gpio_free(eoc_gpio);
+exit:
+ return err;
+}
+
+static int ak8975_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct ak8975_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ if (data->eoc_irq)
+ free_irq(data->eoc_irq, data);
+
+ if (gpio_is_valid(data->eoc_gpio))
+ gpio_free(data->eoc_gpio);
+
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id ak8975_id[] = {
+ {"ak8975", AK8975},
+ {"ak8963", AK8963},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, ak8975_id);
+
+static const struct of_device_id ak8975_of_match[] = {
+ { .compatible = "asahi-kasei,ak8975", },
+ { .compatible = "ak8975", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ak8975_of_match);
+
+static struct i2c_driver ak8975_driver = {
+ .driver = {
+ .name = "ak8975",
+ .of_match_table = ak8975_of_match,
+ .acpi_match_table = ACPI_PTR(ak_acpi_match),
+ },
+ .probe = ak8975_probe,
+ .remove = ak8975_remove,
+ .id_table = ak8975_id,
+};
+module_i2c_driver(ak8975_driver);
+
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_DESCRIPTION("AK8975 magnetometer driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
new file mode 100644
index 00000000000..b2b0937d513
--- /dev/null
+++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
@@ -0,0 +1,433 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+enum magn_3d_channel {
+ CHANNEL_SCAN_INDEX_X,
+ CHANNEL_SCAN_INDEX_Y,
+ CHANNEL_SCAN_INDEX_Z,
+ MAGN_3D_CHANNEL_MAX,
+};
+
+struct magn_3d_state {
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX];
+ u32 magn_val[MAGN_3D_CHANNEL_MAX];
+ int scale_pre_decml;
+ int scale_post_decml;
+ int scale_precision;
+ int value_offset;
+};
+
+static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
+ HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS,
+ HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS,
+ HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec magn_3d_channels[] = {
+ {
+ .type = IIO_MAGN,
+ .modified = 1,
+ .channel2 = IIO_MOD_X,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_X,
+ }, {
+ .type = IIO_MAGN,
+ .modified = 1,
+ .channel2 = IIO_MOD_Y,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_Y,
+ }, {
+ .type = IIO_MAGN,
+ .modified = 1,
+ .channel2 = IIO_MOD_Z,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_Z,
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
+ int channel, int size)
+{
+ channels[channel].scan_type.sign = 's';
+ /* Real storage bits will change based on the report desc. */
+ channels[channel].scan_type.realbits = size * 8;
+ /* Maximum size of a sample to capture is u32 */
+ channels[channel].scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int magn_3d_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct magn_3d_state *magn_state = iio_priv(indio_dev);
+ int report_id = -1;
+ u32 address;
+ int ret_type;
+ s32 poll_value;
+
+ *val = 0;
+ *val2 = 0;
+ switch (mask) {
+ case 0:
+ poll_value = hid_sensor_read_poll_value(
+ &magn_state->common_attributes);
+ if (poll_value < 0)
+ return -EINVAL;
+
+ hid_sensor_power_state(&magn_state->common_attributes, true);
+ msleep_interruptible(poll_value * 2);
+
+ report_id =
+ magn_state->magn[chan->scan_index].report_id;
+ address = magn_3d_addresses[chan->scan_index];
+ if (report_id >= 0)
+ *val = sensor_hub_input_attr_get_raw_value(
+ magn_state->common_attributes.hsdev,
+ HID_USAGE_SENSOR_COMPASS_3D, address,
+ report_id);
+ else {
+ *val = 0;
+ hid_sensor_power_state(&magn_state->common_attributes,
+ false);
+ return -EINVAL;
+ }
+ hid_sensor_power_state(&magn_state->common_attributes, false);
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = magn_state->scale_pre_decml;
+ *val2 = magn_state->scale_post_decml;
+ ret_type = magn_state->scale_precision;
+ break;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = magn_state->value_offset;
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret_type = hid_sensor_read_samp_freq_value(
+ &magn_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret_type = hid_sensor_read_raw_hyst_value(
+ &magn_state->common_attributes, val, val2);
+ break;
+ default:
+ ret_type = -EINVAL;
+ break;
+ }
+
+ return ret_type;
+}
+
+/* Channel write_raw handler */
+static int magn_3d_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct magn_3d_state *magn_state = iio_priv(indio_dev);
+ int ret = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_write_samp_freq_value(
+ &magn_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_write_raw_hyst_value(
+ &magn_state->common_attributes, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct iio_info magn_3d_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &magn_3d_read_raw,
+ .write_raw = &magn_3d_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
+ int len)
+{
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+ iio_push_to_buffers(indio_dev, data);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct magn_3d_state *magn_state = iio_priv(indio_dev);
+
+ dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n");
+ if (atomic_read(&magn_state->common_attributes.data_ready))
+ hid_sensor_push_data(indio_dev,
+ magn_state->magn_val,
+ sizeof(magn_state->magn_val));
+
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ size_t raw_len, char *raw_data,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct magn_3d_state *magn_state = iio_priv(indio_dev);
+ int offset;
+ int ret = -EINVAL;
+
+ switch (usage_id) {
+ case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS:
+ case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS:
+ case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS:
+ offset = usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS;
+ magn_state->magn_val[CHANNEL_SCAN_INDEX_X + offset] =
+ *(u32 *)raw_data;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int magn_3d_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned usage_id,
+ struct magn_3d_state *st)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
+ ret = sensor_hub_input_get_attribute_info(hsdev,
+ HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS + i,
+ &st->magn[CHANNEL_SCAN_INDEX_X + i]);
+ if (ret < 0)
+ break;
+ magn_3d_adjust_channel_bit_mask(channels,
+ CHANNEL_SCAN_INDEX_X + i,
+ st->magn[CHANNEL_SCAN_INDEX_X + i].size);
+ }
+ dev_dbg(&pdev->dev, "magn_3d %x:%x, %x:%x, %x:%x\n",
+ st->magn[0].index,
+ st->magn[0].report_id,
+ st->magn[1].index, st->magn[1].report_id,
+ st->magn[2].index, st->magn[2].report_id);
+
+ st->scale_precision = hid_sensor_format_scale(
+ HID_USAGE_SENSOR_COMPASS_3D,
+ &st->magn[CHANNEL_SCAN_INDEX_X],
+ &st->scale_pre_decml, &st->scale_post_decml);
+
+ /* Set Sensitivity field ids, when there is no individual modifier */
+ if (st->common_attributes.sensitivity.index < 0) {
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+ HID_USAGE_SENSOR_DATA_ORIENTATION,
+ &st->common_attributes.sensitivity);
+ dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+ st->common_attributes.sensitivity.index,
+ st->common_attributes.sensitivity.report_id);
+ }
+
+ return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_magn_3d_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ static char *name = "magn_3d";
+ struct iio_dev *indio_dev;
+ struct magn_3d_state *magn_state;
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_chan_spec *channels;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev,
+ sizeof(struct magn_3d_state));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ magn_state = iio_priv(indio_dev);
+ magn_state->common_attributes.hsdev = hsdev;
+ magn_state->common_attributes.pdev = pdev;
+
+ ret = hid_sensor_parse_common_attributes(hsdev,
+ HID_USAGE_SENSOR_COMPASS_3D,
+ &magn_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ channels = kmemdup(magn_3d_channels, sizeof(magn_3d_channels),
+ GFP_KERNEL);
+ if (!channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ return -ENOMEM;
+ }
+
+ ret = magn_3d_parse_report(pdev, hsdev, channels,
+ HID_USAGE_SENSOR_COMPASS_3D, magn_state);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ goto error_free_dev_mem;
+ }
+
+ indio_dev->channels = channels;
+ indio_dev->num_channels = ARRAY_SIZE(magn_3d_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &magn_3d_info;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ NULL, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+ goto error_free_dev_mem;
+ }
+ atomic_set(&magn_state->common_attributes.data_ready, 0);
+ ret = hid_sensor_setup_trigger(indio_dev, name,
+ &magn_state->common_attributes);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ goto error_unreg_buffer_funcs;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_trigger;
+ }
+
+ magn_state->callbacks.send_event = magn_3d_proc_event;
+ magn_state->callbacks.capture_sample = magn_3d_capture_sample;
+ magn_state->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D,
+ &magn_state->callbacks);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "callback reg failed\n");
+ goto error_iio_unreg;
+ }
+
+ return ret;
+
+error_iio_unreg:
+ iio_device_unregister(indio_dev);
+error_remove_trigger:
+ hid_sensor_remove_trigger(&magn_state->common_attributes);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_free_dev_mem:
+ kfree(indio_dev->channels);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_magn_3d_remove(struct platform_device *pdev)
+{
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct magn_3d_state *magn_state = iio_priv(indio_dev);
+
+ sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D);
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(&magn_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(indio_dev->channels);
+
+ return 0;
+}
+
+static struct platform_device_id hid_magn_3d_ids[] = {
+ {
+ /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-200083",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids);
+
+static struct platform_driver hid_magn_3d_platform_driver = {
+ .id_table = hid_magn_3d_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = hid_magn_3d_probe,
+ .remove = hid_magn_3d_remove,
+};
+module_platform_driver(hid_magn_3d_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Magnetometer 3D");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/magnetometer/mag3110.c b/drivers/iio/magnetometer/mag3110.c
new file mode 100644
index 00000000000..e3106b43ef4
--- /dev/null
+++ b/drivers/iio/magnetometer/mag3110.c
@@ -0,0 +1,438 @@
+/*
+ * mag3110.c - Support for Freescale MAG3110 magnetometer sensor
+ *
+ * Copyright (c) 2013 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * (7-bit I2C slave address 0x0e)
+ *
+ * TODO: irq, user offset, oversampling, continuous mode
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/delay.h>
+
+#define MAG3110_STATUS 0x00
+#define MAG3110_OUT_X 0x01 /* MSB first */
+#define MAG3110_OUT_Y 0x03
+#define MAG3110_OUT_Z 0x05
+#define MAG3110_WHO_AM_I 0x07
+#define MAG3110_OFF_X 0x09 /* MSB first */
+#define MAG3110_OFF_Y 0x0b
+#define MAG3110_OFF_Z 0x0d
+#define MAG3110_DIE_TEMP 0x0f
+#define MAG3110_CTRL_REG1 0x10
+#define MAG3110_CTRL_REG2 0x11
+
+#define MAG3110_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0))
+
+#define MAG3110_CTRL_DR_MASK (BIT(7) | BIT(6) | BIT(5))
+#define MAG3110_CTRL_DR_SHIFT 5
+#define MAG3110_CTRL_DR_DEFAULT 0
+
+#define MAG3110_CTRL_TM BIT(1) /* trigger single measurement */
+#define MAG3110_CTRL_AC BIT(0) /* continuous measurements */
+
+#define MAG3110_CTRL_AUTO_MRST_EN BIT(7) /* magnetic auto-reset */
+#define MAG3110_CTRL_RAW BIT(5) /* measurements not user-offset corrected */
+
+#define MAG3110_DEVICE_ID 0xc4
+
+/* Each client has this additional data */
+struct mag3110_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ u8 ctrl_reg1;
+};
+
+static int mag3110_request(struct mag3110_data *data)
+{
+ int ret, tries = 150;
+
+ /* trigger measurement */
+ ret = i2c_smbus_write_byte_data(data->client, MAG3110_CTRL_REG1,
+ data->ctrl_reg1 | MAG3110_CTRL_TM);
+ if (ret < 0)
+ return ret;
+
+ while (tries-- > 0) {
+ ret = i2c_smbus_read_byte_data(data->client, MAG3110_STATUS);
+ if (ret < 0)
+ return ret;
+ /* wait for data ready */
+ if ((ret & MAG3110_STATUS_DRDY) == MAG3110_STATUS_DRDY)
+ break;
+ msleep(20);
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev, "data not ready\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int mag3110_read(struct mag3110_data *data, __be16 buf[3])
+{
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = mag3110_request(data);
+ if (ret < 0) {
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ ret = i2c_smbus_read_i2c_block_data(data->client,
+ MAG3110_OUT_X, 3 * sizeof(__be16), (u8 *) buf);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static ssize_t mag3110_show_int_plus_micros(char *buf,
+ const int (*vals)[2], int n)
+{
+ size_t len = 0;
+
+ while (n-- > 0)
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "%d.%06d ", vals[n][0], vals[n][1]);
+
+ /* replace trailing space by newline */
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static int mag3110_get_int_plus_micros_index(const int (*vals)[2], int n,
+ int val, int val2)
+{
+ while (n-- > 0)
+ if (val == vals[n][0] && val2 == vals[n][1])
+ return n;
+
+ return -EINVAL;
+}
+
+static const int mag3110_samp_freq[8][2] = {
+ {80, 0}, {40, 0}, {20, 0}, {10, 0}, {5, 0}, {2, 500000},
+ {1, 250000}, {0, 625000}
+};
+
+static ssize_t mag3110_show_samp_freq_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return mag3110_show_int_plus_micros(buf, mag3110_samp_freq, 8);
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(mag3110_show_samp_freq_avail);
+
+static int mag3110_get_samp_freq_index(struct mag3110_data *data,
+ int val, int val2)
+{
+ return mag3110_get_int_plus_micros_index(mag3110_samp_freq, 8, val,
+ val2);
+}
+
+static int mag3110_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct mag3110_data *data = iio_priv(indio_dev);
+ __be16 buffer[3];
+ int i, ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ switch (chan->type) {
+ case IIO_MAGN: /* in 0.1 uT / LSB */
+ ret = mag3110_read(data, buffer);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(
+ be16_to_cpu(buffer[chan->scan_index]), 15);
+ return IIO_VAL_INT;
+ case IIO_TEMP: /* in 1 C / LSB */
+ mutex_lock(&data->lock);
+ ret = mag3110_request(data);
+ if (ret < 0) {
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ ret = i2c_smbus_read_byte_data(data->client,
+ MAG3110_DIE_TEMP);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(ret, 7);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_MAGN:
+ *val = 0;
+ *val2 = 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_TEMP:
+ *val = 1000;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ i = data->ctrl_reg1 >> MAG3110_CTRL_DR_SHIFT;
+ *val = mag3110_samp_freq[i][0];
+ *val2 = mag3110_samp_freq[i][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ ret = i2c_smbus_read_word_swapped(data->client,
+ MAG3110_OFF_X + 2 * chan->scan_index);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(ret >> 1, 14);
+ return IIO_VAL_INT;
+ }
+ return -EINVAL;
+}
+
+static int mag3110_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct mag3110_data *data = iio_priv(indio_dev);
+ int rate;
+
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ rate = mag3110_get_samp_freq_index(data, val, val2);
+ if (rate < 0)
+ return -EINVAL;
+
+ data->ctrl_reg1 &= ~MAG3110_CTRL_DR_MASK;
+ data->ctrl_reg1 |= rate << MAG3110_CTRL_DR_SHIFT;
+ return i2c_smbus_write_byte_data(data->client,
+ MAG3110_CTRL_REG1, data->ctrl_reg1);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (val < -10000 || val > 10000)
+ return -EINVAL;
+ return i2c_smbus_write_word_swapped(data->client,
+ MAG3110_OFF_X + 2 * chan->scan_index, val << 1);
+ default:
+ return -EINVAL;
+ }
+}
+
+static irqreturn_t mag3110_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct mag3110_data *data = iio_priv(indio_dev);
+ u8 buffer[16]; /* 3 16-bit channels + 1 byte temp + padding + ts */
+ int ret;
+
+ ret = mag3110_read(data, (__be16 *) buffer);
+ if (ret < 0)
+ goto done;
+
+ if (test_bit(3, indio_dev->active_scan_mask)) {
+ ret = i2c_smbus_read_byte_data(data->client,
+ MAG3110_DIE_TEMP);
+ if (ret < 0)
+ goto done;
+ buffer[6] = ret;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+ iio_get_time_ns());
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+}
+
+#define MAG3110_CHANNEL(axis, idx) { \
+ .type = IIO_MAGN, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .scan_index = idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+static const struct iio_chan_spec mag3110_channels[] = {
+ MAG3110_CHANNEL(X, 0),
+ MAG3110_CHANNEL(Y, 1),
+ MAG3110_CHANNEL(Z, 2),
+ {
+ .type = IIO_TEMP,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .scan_index = 3,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 8,
+ .storagebits = 8,
+ },
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static struct attribute *mag3110_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group mag3110_group = {
+ .attrs = mag3110_attributes,
+};
+
+static const struct iio_info mag3110_info = {
+ .attrs = &mag3110_group,
+ .read_raw = &mag3110_read_raw,
+ .write_raw = &mag3110_write_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static const unsigned long mag3110_scan_masks[] = {0x7, 0xf, 0};
+
+static int mag3110_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct mag3110_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, MAG3110_WHO_AM_I);
+ if (ret < 0)
+ return ret;
+ if (ret != MAG3110_DEVICE_ID)
+ return -ENODEV;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ data->client = client;
+ mutex_init(&data->lock);
+
+ i2c_set_clientdata(client, indio_dev);
+ indio_dev->info = &mag3110_info;
+ indio_dev->name = id->name;
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = mag3110_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mag3110_channels);
+ indio_dev->available_scan_masks = mag3110_scan_masks;
+
+ data->ctrl_reg1 = MAG3110_CTRL_DR_DEFAULT << MAG3110_CTRL_DR_SHIFT;
+ ret = i2c_smbus_write_byte_data(client, MAG3110_CTRL_REG1,
+ data->ctrl_reg1);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, MAG3110_CTRL_REG2,
+ MAG3110_CTRL_AUTO_MRST_EN);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ mag3110_trigger_handler, NULL);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto buffer_cleanup;
+ return 0;
+
+buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+static int mag3110_standby(struct mag3110_data *data)
+{
+ return i2c_smbus_write_byte_data(data->client, MAG3110_CTRL_REG1,
+ data->ctrl_reg1 & ~MAG3110_CTRL_AC);
+}
+
+static int mag3110_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ mag3110_standby(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mag3110_suspend(struct device *dev)
+{
+ return mag3110_standby(iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev))));
+}
+
+static int mag3110_resume(struct device *dev)
+{
+ struct mag3110_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+
+ return i2c_smbus_write_byte_data(data->client, MAG3110_CTRL_REG1,
+ data->ctrl_reg1);
+}
+
+static SIMPLE_DEV_PM_OPS(mag3110_pm_ops, mag3110_suspend, mag3110_resume);
+#define MAG3110_PM_OPS (&mag3110_pm_ops)
+#else
+#define MAG3110_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id mag3110_id[] = {
+ { "mag3110", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mag3110_id);
+
+static struct i2c_driver mag3110_driver = {
+ .driver = {
+ .name = "mag3110",
+ .pm = MAG3110_PM_OPS,
+ },
+ .probe = mag3110_probe,
+ .remove = mag3110_remove,
+ .id_table = mag3110_id,
+};
+module_i2c_driver(mag3110_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Freescale MAG3110 magnetometer driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/magnetometer/st_magn.h b/drivers/iio/magnetometer/st_magn.h
new file mode 100644
index 00000000000..694e33e0fb7
--- /dev/null
+++ b/drivers/iio/magnetometer/st_magn.h
@@ -0,0 +1,46 @@
+/*
+ * STMicroelectronics magnetometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ * v. 1.0.0
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_MAGN_H
+#define ST_MAGN_H
+
+#include <linux/types.h>
+#include <linux/iio/common/st_sensors.h>
+
+#define LSM303DLHC_MAGN_DEV_NAME "lsm303dlhc_magn"
+#define LSM303DLM_MAGN_DEV_NAME "lsm303dlm_magn"
+#define LIS3MDL_MAGN_DEV_NAME "lis3mdl"
+
+int st_magn_common_probe(struct iio_dev *indio_dev,
+ struct st_sensors_platform_data *pdata);
+void st_magn_common_remove(struct iio_dev *indio_dev);
+
+#ifdef CONFIG_IIO_BUFFER
+int st_magn_allocate_ring(struct iio_dev *indio_dev);
+void st_magn_deallocate_ring(struct iio_dev *indio_dev);
+#else /* CONFIG_IIO_BUFFER */
+static inline int st_magn_probe_trigger(struct iio_dev *indio_dev, int irq)
+{
+ return 0;
+}
+static inline void st_magn_remove_trigger(struct iio_dev *indio_dev, int irq)
+{
+ return;
+}
+static inline int st_magn_allocate_ring(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+static inline void st_magn_deallocate_ring(struct iio_dev *indio_dev)
+{
+}
+#endif /* CONFIG_IIO_BUFFER */
+
+#endif /* ST_MAGN_H */
diff --git a/drivers/iio/magnetometer/st_magn_buffer.c b/drivers/iio/magnetometer/st_magn_buffer.c
new file mode 100644
index 00000000000..bf427dc0d22
--- /dev/null
+++ b/drivers/iio/magnetometer/st_magn_buffer.c
@@ -0,0 +1,89 @@
+/*
+ * STMicroelectronics magnetometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_magn.h"
+
+static int st_magn_buffer_preenable(struct iio_dev *indio_dev)
+{
+ return st_sensors_set_enable(indio_dev, true);
+}
+
+static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *mdata = iio_priv(indio_dev);
+
+ mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
+ if (mdata->buffer_data == NULL) {
+ err = -ENOMEM;
+ goto allocate_memory_error;
+ }
+
+ err = iio_triggered_buffer_postenable(indio_dev);
+ if (err < 0)
+ goto st_magn_buffer_postenable_error;
+
+ return err;
+
+st_magn_buffer_postenable_error:
+ kfree(mdata->buffer_data);
+allocate_memory_error:
+ return err;
+}
+
+static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *mdata = iio_priv(indio_dev);
+
+ err = iio_triggered_buffer_predisable(indio_dev);
+ if (err < 0)
+ goto st_magn_buffer_predisable_error;
+
+ err = st_sensors_set_enable(indio_dev, false);
+
+st_magn_buffer_predisable_error:
+ kfree(mdata->buffer_data);
+ return err;
+}
+
+static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
+ .preenable = &st_magn_buffer_preenable,
+ .postenable = &st_magn_buffer_postenable,
+ .predisable = &st_magn_buffer_predisable,
+};
+
+int st_magn_allocate_ring(struct iio_dev *indio_dev)
+{
+ return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ &st_sensors_trigger_handler, &st_magn_buffer_setup_ops);
+}
+
+void st_magn_deallocate_ring(struct iio_dev *indio_dev)
+{
+ iio_triggered_buffer_cleanup(indio_dev);
+}
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
new file mode 100644
index 00000000000..240a21dd0c6
--- /dev/null
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -0,0 +1,423 @@
+/*
+ * STMicroelectronics magnetometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_magn.h"
+
+#define ST_MAGN_NUMBER_DATA_CHANNELS 3
+
+/* DEFAULT VALUE FOR SENSORS */
+#define ST_MAGN_DEFAULT_OUT_X_H_ADDR 0X03
+#define ST_MAGN_DEFAULT_OUT_Y_H_ADDR 0X07
+#define ST_MAGN_DEFAULT_OUT_Z_H_ADDR 0X05
+
+/* FULLSCALE */
+#define ST_MAGN_FS_AVL_1300MG 1300
+#define ST_MAGN_FS_AVL_1900MG 1900
+#define ST_MAGN_FS_AVL_2500MG 2500
+#define ST_MAGN_FS_AVL_4000MG 4000
+#define ST_MAGN_FS_AVL_4700MG 4700
+#define ST_MAGN_FS_AVL_5600MG 5600
+#define ST_MAGN_FS_AVL_8000MG 8000
+#define ST_MAGN_FS_AVL_8100MG 8100
+#define ST_MAGN_FS_AVL_10000MG 10000
+
+/* CUSTOM VALUES FOR SENSOR 1 */
+#define ST_MAGN_1_WAI_EXP 0x3c
+#define ST_MAGN_1_ODR_ADDR 0x00
+#define ST_MAGN_1_ODR_MASK 0x1c
+#define ST_MAGN_1_ODR_AVL_1HZ_VAL 0x00
+#define ST_MAGN_1_ODR_AVL_2HZ_VAL 0x01
+#define ST_MAGN_1_ODR_AVL_3HZ_VAL 0x02
+#define ST_MAGN_1_ODR_AVL_8HZ_VAL 0x03
+#define ST_MAGN_1_ODR_AVL_15HZ_VAL 0x04
+#define ST_MAGN_1_ODR_AVL_30HZ_VAL 0x05
+#define ST_MAGN_1_ODR_AVL_75HZ_VAL 0x06
+#define ST_MAGN_1_ODR_AVL_220HZ_VAL 0x07
+#define ST_MAGN_1_PW_ADDR 0x02
+#define ST_MAGN_1_PW_MASK 0x03
+#define ST_MAGN_1_PW_ON 0x00
+#define ST_MAGN_1_PW_OFF 0x03
+#define ST_MAGN_1_FS_ADDR 0x01
+#define ST_MAGN_1_FS_MASK 0xe0
+#define ST_MAGN_1_FS_AVL_1300_VAL 0x01
+#define ST_MAGN_1_FS_AVL_1900_VAL 0x02
+#define ST_MAGN_1_FS_AVL_2500_VAL 0x03
+#define ST_MAGN_1_FS_AVL_4000_VAL 0x04
+#define ST_MAGN_1_FS_AVL_4700_VAL 0x05
+#define ST_MAGN_1_FS_AVL_5600_VAL 0x06
+#define ST_MAGN_1_FS_AVL_8100_VAL 0x07
+#define ST_MAGN_1_FS_AVL_1300_GAIN_XY 1100
+#define ST_MAGN_1_FS_AVL_1900_GAIN_XY 855
+#define ST_MAGN_1_FS_AVL_2500_GAIN_XY 670
+#define ST_MAGN_1_FS_AVL_4000_GAIN_XY 450
+#define ST_MAGN_1_FS_AVL_4700_GAIN_XY 400
+#define ST_MAGN_1_FS_AVL_5600_GAIN_XY 330
+#define ST_MAGN_1_FS_AVL_8100_GAIN_XY 230
+#define ST_MAGN_1_FS_AVL_1300_GAIN_Z 980
+#define ST_MAGN_1_FS_AVL_1900_GAIN_Z 760
+#define ST_MAGN_1_FS_AVL_2500_GAIN_Z 600
+#define ST_MAGN_1_FS_AVL_4000_GAIN_Z 400
+#define ST_MAGN_1_FS_AVL_4700_GAIN_Z 355
+#define ST_MAGN_1_FS_AVL_5600_GAIN_Z 295
+#define ST_MAGN_1_FS_AVL_8100_GAIN_Z 205
+#define ST_MAGN_1_MULTIREAD_BIT false
+
+/* CUSTOM VALUES FOR SENSOR 2 */
+#define ST_MAGN_2_WAI_EXP 0x3d
+#define ST_MAGN_2_ODR_ADDR 0x20
+#define ST_MAGN_2_ODR_MASK 0x1c
+#define ST_MAGN_2_ODR_AVL_1HZ_VAL 0x00
+#define ST_MAGN_2_ODR_AVL_2HZ_VAL 0x01
+#define ST_MAGN_2_ODR_AVL_3HZ_VAL 0x02
+#define ST_MAGN_2_ODR_AVL_5HZ_VAL 0x03
+#define ST_MAGN_2_ODR_AVL_10HZ_VAL 0x04
+#define ST_MAGN_2_ODR_AVL_20HZ_VAL 0x05
+#define ST_MAGN_2_ODR_AVL_40HZ_VAL 0x06
+#define ST_MAGN_2_ODR_AVL_80HZ_VAL 0x07
+#define ST_MAGN_2_PW_ADDR 0x22
+#define ST_MAGN_2_PW_MASK 0x03
+#define ST_MAGN_2_PW_ON 0x00
+#define ST_MAGN_2_PW_OFF 0x03
+#define ST_MAGN_2_FS_ADDR 0x21
+#define ST_MAGN_2_FS_MASK 0x60
+#define ST_MAGN_2_FS_AVL_4000_VAL 0x00
+#define ST_MAGN_2_FS_AVL_8000_VAL 0x01
+#define ST_MAGN_2_FS_AVL_10000_VAL 0x02
+#define ST_MAGN_2_FS_AVL_4000_GAIN 430
+#define ST_MAGN_2_FS_AVL_8000_GAIN 230
+#define ST_MAGN_2_FS_AVL_10000_GAIN 230
+#define ST_MAGN_2_MULTIREAD_BIT false
+#define ST_MAGN_2_OUT_X_L_ADDR 0x28
+#define ST_MAGN_2_OUT_Y_L_ADDR 0x2a
+#define ST_MAGN_2_OUT_Z_L_ADDR 0x2c
+
+static const struct iio_chan_spec st_magn_16bit_channels[] = {
+ ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_BE, 16, 16,
+ ST_MAGN_DEFAULT_OUT_X_H_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_BE, 16, 16,
+ ST_MAGN_DEFAULT_OUT_Y_H_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_BE, 16, 16,
+ ST_MAGN_DEFAULT_OUT_Z_H_ADDR),
+ IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct iio_chan_spec st_magn_2_16bit_channels[] = {
+ ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
+ ST_MAGN_2_OUT_X_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
+ ST_MAGN_2_OUT_Y_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
+ ST_MAGN_2_OUT_Z_L_ADDR),
+ IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct st_sensors st_magn_sensors[] = {
+ {
+ .wai = ST_MAGN_1_WAI_EXP,
+ .sensors_supported = {
+ [0] = LSM303DLHC_MAGN_DEV_NAME,
+ [1] = LSM303DLM_MAGN_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_magn_16bit_channels,
+ .odr = {
+ .addr = ST_MAGN_1_ODR_ADDR,
+ .mask = ST_MAGN_1_ODR_MASK,
+ .odr_avl = {
+ { 1, ST_MAGN_1_ODR_AVL_1HZ_VAL, },
+ { 2, ST_MAGN_1_ODR_AVL_2HZ_VAL, },
+ { 3, ST_MAGN_1_ODR_AVL_3HZ_VAL, },
+ { 8, ST_MAGN_1_ODR_AVL_8HZ_VAL, },
+ { 15, ST_MAGN_1_ODR_AVL_15HZ_VAL, },
+ { 30, ST_MAGN_1_ODR_AVL_30HZ_VAL, },
+ { 75, ST_MAGN_1_ODR_AVL_75HZ_VAL, },
+ { 220, ST_MAGN_1_ODR_AVL_220HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_MAGN_1_PW_ADDR,
+ .mask = ST_MAGN_1_PW_MASK,
+ .value_on = ST_MAGN_1_PW_ON,
+ .value_off = ST_MAGN_1_PW_OFF,
+ },
+ .fs = {
+ .addr = ST_MAGN_1_FS_ADDR,
+ .mask = ST_MAGN_1_FS_MASK,
+ .fs_avl = {
+ [0] = {
+ .num = ST_MAGN_FS_AVL_1300MG,
+ .value = ST_MAGN_1_FS_AVL_1300_VAL,
+ .gain = ST_MAGN_1_FS_AVL_1300_GAIN_XY,
+ .gain2 = ST_MAGN_1_FS_AVL_1300_GAIN_Z,
+ },
+ [1] = {
+ .num = ST_MAGN_FS_AVL_1900MG,
+ .value = ST_MAGN_1_FS_AVL_1900_VAL,
+ .gain = ST_MAGN_1_FS_AVL_1900_GAIN_XY,
+ .gain2 = ST_MAGN_1_FS_AVL_1900_GAIN_Z,
+ },
+ [2] = {
+ .num = ST_MAGN_FS_AVL_2500MG,
+ .value = ST_MAGN_1_FS_AVL_2500_VAL,
+ .gain = ST_MAGN_1_FS_AVL_2500_GAIN_XY,
+ .gain2 = ST_MAGN_1_FS_AVL_2500_GAIN_Z,
+ },
+ [3] = {
+ .num = ST_MAGN_FS_AVL_4000MG,
+ .value = ST_MAGN_1_FS_AVL_4000_VAL,
+ .gain = ST_MAGN_1_FS_AVL_4000_GAIN_XY,
+ .gain2 = ST_MAGN_1_FS_AVL_4000_GAIN_Z,
+ },
+ [4] = {
+ .num = ST_MAGN_FS_AVL_4700MG,
+ .value = ST_MAGN_1_FS_AVL_4700_VAL,
+ .gain = ST_MAGN_1_FS_AVL_4700_GAIN_XY,
+ .gain2 = ST_MAGN_1_FS_AVL_4700_GAIN_Z,
+ },
+ [5] = {
+ .num = ST_MAGN_FS_AVL_5600MG,
+ .value = ST_MAGN_1_FS_AVL_5600_VAL,
+ .gain = ST_MAGN_1_FS_AVL_5600_GAIN_XY,
+ .gain2 = ST_MAGN_1_FS_AVL_5600_GAIN_Z,
+ },
+ [6] = {
+ .num = ST_MAGN_FS_AVL_8100MG,
+ .value = ST_MAGN_1_FS_AVL_8100_VAL,
+ .gain = ST_MAGN_1_FS_AVL_8100_GAIN_XY,
+ .gain2 = ST_MAGN_1_FS_AVL_8100_GAIN_Z,
+ },
+ },
+ },
+ .multi_read_bit = ST_MAGN_1_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+ {
+ .wai = ST_MAGN_2_WAI_EXP,
+ .sensors_supported = {
+ [0] = LIS3MDL_MAGN_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_magn_2_16bit_channels,
+ .odr = {
+ .addr = ST_MAGN_2_ODR_ADDR,
+ .mask = ST_MAGN_2_ODR_MASK,
+ .odr_avl = {
+ { 1, ST_MAGN_2_ODR_AVL_1HZ_VAL, },
+ { 2, ST_MAGN_2_ODR_AVL_2HZ_VAL, },
+ { 3, ST_MAGN_2_ODR_AVL_3HZ_VAL, },
+ { 5, ST_MAGN_2_ODR_AVL_5HZ_VAL, },
+ { 10, ST_MAGN_2_ODR_AVL_10HZ_VAL, },
+ { 20, ST_MAGN_2_ODR_AVL_20HZ_VAL, },
+ { 40, ST_MAGN_2_ODR_AVL_40HZ_VAL, },
+ { 80, ST_MAGN_2_ODR_AVL_80HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_MAGN_2_PW_ADDR,
+ .mask = ST_MAGN_2_PW_MASK,
+ .value_on = ST_MAGN_2_PW_ON,
+ .value_off = ST_MAGN_2_PW_OFF,
+ },
+ .fs = {
+ .addr = ST_MAGN_2_FS_ADDR,
+ .mask = ST_MAGN_2_FS_MASK,
+ .fs_avl = {
+ [0] = {
+ .num = ST_MAGN_FS_AVL_4000MG,
+ .value = ST_MAGN_2_FS_AVL_4000_VAL,
+ .gain = ST_MAGN_2_FS_AVL_4000_GAIN,
+ },
+ [1] = {
+ .num = ST_MAGN_FS_AVL_8000MG,
+ .value = ST_MAGN_2_FS_AVL_8000_VAL,
+ .gain = ST_MAGN_2_FS_AVL_8000_GAIN,
+ },
+ [2] = {
+ .num = ST_MAGN_FS_AVL_10000MG,
+ .value = ST_MAGN_2_FS_AVL_10000_VAL,
+ .gain = ST_MAGN_2_FS_AVL_10000_GAIN,
+ },
+ },
+ },
+ .multi_read_bit = ST_MAGN_2_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+};
+
+static int st_magn_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *ch, int *val,
+ int *val2, long mask)
+{
+ int err;
+ struct st_sensor_data *mdata = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ err = st_sensors_read_info_raw(indio_dev, ch, val);
+ if (err < 0)
+ goto read_error;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ if ((ch->scan_index == ST_SENSORS_SCAN_Z) &&
+ (mdata->current_fullscale->gain2 != 0))
+ *val2 = mdata->current_fullscale->gain2;
+ else
+ *val2 = mdata->current_fullscale->gain;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+
+read_error:
+ return err;
+}
+
+static int st_magn_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+ int err;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
+static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
+static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_magn_scale_available);
+
+static struct attribute *st_magn_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_magn_scale_available.dev_attr.attr,
+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_magn_attribute_group = {
+ .attrs = st_magn_attributes,
+};
+
+static const struct iio_info magn_info = {
+ .driver_module = THIS_MODULE,
+ .attrs = &st_magn_attribute_group,
+ .read_raw = &st_magn_read_raw,
+ .write_raw = &st_magn_write_raw,
+};
+
+int st_magn_common_probe(struct iio_dev *indio_dev,
+ struct st_sensors_platform_data *pdata)
+{
+ struct st_sensor_data *mdata = iio_priv(indio_dev);
+ int irq = mdata->get_irq_data_ready(indio_dev);
+ int err;
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &magn_info;
+
+ st_sensors_power_enable(indio_dev);
+
+ err = st_sensors_check_device_support(indio_dev,
+ ARRAY_SIZE(st_magn_sensors), st_magn_sensors);
+ if (err < 0)
+ return err;
+
+ mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS;
+ mdata->multiread_bit = mdata->sensor->multi_read_bit;
+ indio_dev->channels = mdata->sensor->ch;
+ indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
+
+ mdata->current_fullscale = (struct st_sensor_fullscale_avl *)
+ &mdata->sensor->fs.fs_avl[0];
+ mdata->odr = mdata->sensor->odr.odr_avl[0].hz;
+
+ err = st_sensors_init_sensor(indio_dev, pdata);
+ if (err < 0)
+ return err;
+
+ err = st_magn_allocate_ring(indio_dev);
+ if (err < 0)
+ return err;
+
+ if (irq > 0) {
+ err = st_sensors_allocate_trigger(indio_dev, NULL);
+ if (err < 0)
+ goto st_magn_probe_trigger_error;
+ }
+
+ err = iio_device_register(indio_dev);
+ if (err)
+ goto st_magn_device_register_error;
+
+ dev_info(&indio_dev->dev, "registered magnetometer %s\n",
+ indio_dev->name);
+
+ return 0;
+
+st_magn_device_register_error:
+ if (irq > 0)
+ st_sensors_deallocate_trigger(indio_dev);
+st_magn_probe_trigger_error:
+ st_magn_deallocate_ring(indio_dev);
+
+ return err;
+}
+EXPORT_SYMBOL(st_magn_common_probe);
+
+void st_magn_common_remove(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *mdata = iio_priv(indio_dev);
+
+ st_sensors_power_disable(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ if (mdata->get_irq_data_ready(indio_dev) > 0)
+ st_sensors_deallocate_trigger(indio_dev);
+
+ st_magn_deallocate_ring(indio_dev);
+}
+EXPORT_SYMBOL(st_magn_common_remove);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics magnetometers driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c
new file mode 100644
index 00000000000..892e0feeb5c
--- /dev/null
+++ b/drivers/iio/magnetometer/st_magn_i2c.c
@@ -0,0 +1,73 @@
+/*
+ * STMicroelectronics magnetometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_i2c.h>
+#include "st_magn.h"
+
+static int st_magn_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *mdata;
+ int err;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ mdata = iio_priv(indio_dev);
+ mdata->dev = &client->dev;
+
+ st_sensors_i2c_configure(indio_dev, client, mdata);
+
+ err = st_magn_common_probe(indio_dev, NULL);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int st_magn_i2c_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ st_magn_common_remove(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id st_magn_id_table[] = {
+ { LSM303DLHC_MAGN_DEV_NAME },
+ { LSM303DLM_MAGN_DEV_NAME },
+ { LIS3MDL_MAGN_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
+
+static struct i2c_driver st_magn_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-magn-i2c",
+ },
+ .probe = st_magn_i2c_probe,
+ .remove = st_magn_i2c_remove,
+ .id_table = st_magn_id_table,
+};
+module_i2c_driver(st_magn_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c
new file mode 100644
index 00000000000..a6143ea51df
--- /dev/null
+++ b/drivers/iio/magnetometer/st_magn_spi.c
@@ -0,0 +1,72 @@
+/*
+ * STMicroelectronics magnetometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#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"
+
+static int st_magn_spi_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *mdata;
+ int err;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ mdata = iio_priv(indio_dev);
+ mdata->dev = &spi->dev;
+
+ st_sensors_spi_configure(indio_dev, spi, mdata);
+
+ err = st_magn_common_probe(indio_dev, NULL);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+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);
+
+ return 0;
+}
+
+static const struct spi_device_id st_magn_id_table[] = {
+ { LSM303DLHC_MAGN_DEV_NAME },
+ { LSM303DLM_MAGN_DEV_NAME },
+ { LIS3MDL_MAGN_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_magn_id_table);
+
+static struct spi_driver st_magn_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-magn-spi",
+ },
+ .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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 21:55:31 +0000