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-rw-r--r--drivers/iio/magnetometer/Kconfig21
-rw-r--r--drivers/iio/magnetometer/Makefile2
-rw-r--r--drivers/iio/magnetometer/ak8975.c89
-rw-r--r--drivers/iio/magnetometer/hid-sensor-magn-3d.c114
-rw-r--r--drivers/iio/magnetometer/mag3110.c438
-rw-r--r--drivers/iio/magnetometer/st_magn.h3
-rw-r--r--drivers/iio/magnetometer/st_magn_buffer.c11
-rw-r--r--drivers/iio/magnetometer/st_magn_core.c62
-rw-r--r--drivers/iio/magnetometer/st_magn_i2c.c17
-rw-r--r--drivers/iio/magnetometer/st_magn_spi.c17
10 files changed, 648 insertions, 126 deletions
diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
index c332b0ae4a3..05a364c543f 100644
--- a/drivers/iio/magnetometer/Kconfig
+++ b/drivers/iio/magnetometer/Kconfig
@@ -1,6 +1,8 @@
#
# Magnetometer sensors
#
+# When adding new entries keep the list in alphabetical order
+
menu "Magnetometer sensors"
config AK8975
@@ -9,11 +11,24 @@ config AK8975
depends on GPIOLIB
help
Say yes here to build support for Asahi Kasei AK8975 3-Axis
- Magnetometer.
+ 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
@@ -36,8 +51,8 @@ config IIO_ST_MAGN_3AXIS
Say yes here to build support for STMicroelectronics magnetometers:
LSM303DLHC, LSM303DLM, LIS3MDL.
- This driver can also be built as a module. If so, will be created
- these modules:
+ 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*]);
diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile
index 7f328e37fba..0f5d3c98579 100644
--- a/drivers/iio/magnetometer/Makefile
+++ b/drivers/iio/magnetometer/Makefile
@@ -2,7 +2,9 @@
# 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
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 7105f22d6cd..ea08313af0d 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -31,6 +31,7 @@
#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>
@@ -85,6 +86,14 @@
#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.
@@ -100,6 +109,7 @@ struct ak8975_data {
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[] = {
@@ -263,17 +273,29 @@ static int ak8975_setup(struct i2c_client *client)
*
* HuT = H * 1229/4096, or roughly, 3/10.
*
- * Since 1uT = 100 gauss, our final scale factor becomes:
+ * Since 1uT = 0.01 gauss, our final scale factor becomes:
*
- * Hadj = H * ((ASA + 128) / 256) * 3/10 * 100
- * Hadj = H * ((ASA + 128) * 30 / 256
+ * 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().
*/
- data->raw_to_gauss[0] = ((data->asa[0] + 128) * 30) >> 8;
- data->raw_to_gauss[1] = ((data->asa[1] + 128) * 30) >> 8;
- data->raw_to_gauss[2] = ((data->asa[2] + 128) * 30) >> 8;
+ 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;
}
@@ -351,8 +373,6 @@ 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;
- u16 meas_reg;
- s16 raw;
int ret;
mutex_lock(&data->lock);
@@ -400,16 +420,11 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val)
dev_err(&client->dev, "Read axis data fails\n");
goto exit;
}
- meas_reg = ret;
mutex_unlock(&data->lock);
- /* Endian conversion of the measured values. */
- raw = (s16) (le16_to_cpu(meas_reg));
-
/* Clamp to valid range. */
- raw = clamp_t(s16, raw, -4096, 4095);
- *val = raw;
+ *val = clamp_t(s16, ret, -4096, 4095);
return IIO_VAL_INT;
exit:
@@ -428,8 +443,9 @@ static int ak8975_read_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_RAW:
return ak8975_read_axis(indio_dev, chan->address, val);
case IIO_CHAN_INFO_SCALE:
- *val = data->raw_to_gauss[chan->address];
- return IIO_VAL_INT;
+ *val = 0;
+ *val2 = data->raw_to_gauss[chan->address];
+ return IIO_VAL_INT_PLUS_MICRO;
}
return -EINVAL;
}
@@ -453,6 +469,27 @@ static const struct iio_info ak8975_info = {
.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)
{
@@ -460,6 +497,7 @@ static int ak8975_probe(struct i2c_client *client,
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)
@@ -497,6 +535,19 @@ static int ak8975_probe(struct i2c_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) {
@@ -512,7 +563,7 @@ static int ak8975_probe(struct i2c_client *client,
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;
@@ -549,7 +600,8 @@ static int ak8975_remove(struct i2c_client *client)
}
static const struct i2c_device_id ak8975_id[] = {
- {"ak8975", 0},
+ {"ak8975", AK8975},
+ {"ak8963", AK8963},
{}
};
@@ -566,6 +618,7 @@ 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,
diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
index 99f4e494513..b2b0937d513 100644
--- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c
+++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
@@ -22,6 +22,7 @@
#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>
@@ -30,10 +31,6 @@
#include <linux/iio/triggered_buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"
-/*Format: HID-SENSOR-usage_id_in_hex*/
-/*Usage ID from spec for Magnetometer-3D: 0x200083*/
-#define DRIVER_NAME "HID-SENSOR-200083"
-
enum magn_3d_channel {
CHANNEL_SCAN_INDEX_X,
CHANNEL_SCAN_INDEX_Y,
@@ -46,6 +43,10 @@ struct magn_3d_state {
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] = {
@@ -60,6 +61,7 @@ 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) |
@@ -69,6 +71,7 @@ static const struct iio_chan_spec magn_3d_channels[] = {
.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) |
@@ -78,6 +81,7 @@ static const struct iio_chan_spec magn_3d_channels[] = {
.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) |
@@ -106,13 +110,21 @@ static int magn_3d_read_raw(struct iio_dev *indio_dev,
struct magn_3d_state *magn_state = iio_priv(indio_dev);
int report_id = -1;
u32 address;
- int ret;
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];
@@ -123,28 +135,29 @@ static int magn_3d_read_raw(struct iio_dev *indio_dev,
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->magn[CHANNEL_SCAN_INDEX_X].units;
- ret_type = IIO_VAL_INT;
+ *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 = hid_sensor_convert_exponent(
- magn_state->magn[CHANNEL_SCAN_INDEX_X].unit_expo);
+ *val = magn_state->value_offset;
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SAMP_FREQ:
- ret = hid_sensor_read_samp_freq_value(
+ ret_type = hid_sensor_read_samp_freq_value(
&magn_state->common_attributes, val, val2);
- ret_type = IIO_VAL_INT_PLUS_MICRO;
break;
case IIO_CHAN_INFO_HYSTERESIS:
- ret = hid_sensor_read_raw_hyst_value(
+ ret_type = hid_sensor_read_raw_hyst_value(
&magn_state->common_attributes, val, val2);
- ret_type = IIO_VAL_INT_PLUS_MICRO;
break;
default:
ret_type = -EINVAL;
@@ -180,25 +193,18 @@ static int magn_3d_write_raw(struct iio_dev *indio_dev,
return ret;
}
-static int magn_3d_write_raw_get_fmt(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- long mask)
-{
- return IIO_VAL_INT_PLUS_MICRO;
-}
-
static const struct iio_info magn_3d_info = {
.driver_module = THIS_MODULE,
.read_raw = &magn_3d_read_raw,
.write_raw = &magn_3d_write_raw,
- .write_raw_get_fmt = &magn_3d_write_raw_get_fmt,
};
/* Function to push data to buffer */
-static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
+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, (u8 *)data);
+ iio_push_to_buffers(indio_dev, data);
}
/* Callback handler to send event after all samples are received and captured */
@@ -209,11 +215,10 @@ static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
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 [%d]\n",
- magn_state->common_attributes.data_ready);
- if (magn_state->common_attributes.data_ready)
+ 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,
- (u8 *)magn_state->magn_val,
+ magn_state->magn_val,
sizeof(magn_state->magn_val));
return 0;
@@ -274,6 +279,23 @@ static int magn_3d_parse_report(struct platform_device *pdev,
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;
}
@@ -287,11 +309,11 @@ static int hid_magn_3d_probe(struct platform_device *pdev)
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
struct iio_chan_spec *channels;
- indio_dev = iio_device_alloc(sizeof(struct magn_3d_state));
- if (indio_dev == NULL) {
- ret = -ENOMEM;
- goto error_ret;
- }
+ 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);
@@ -303,15 +325,14 @@ static int hid_magn_3d_probe(struct platform_device *pdev)
&magn_state->common_attributes);
if (ret) {
dev_err(&pdev->dev, "failed to setup common attributes\n");
- goto error_free_dev;
+ return ret;
}
channels = kmemdup(magn_3d_channels, sizeof(magn_3d_channels),
GFP_KERNEL);
if (!channels) {
- ret = -ENOMEM;
dev_err(&pdev->dev, "failed to duplicate channels\n");
- goto error_free_dev;
+ return -ENOMEM;
}
ret = magn_3d_parse_report(pdev, hsdev, channels,
@@ -334,7 +355,7 @@ static int hid_magn_3d_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
goto error_free_dev_mem;
}
- magn_state->common_attributes.data_ready = false;
+ atomic_set(&magn_state->common_attributes.data_ready, 0);
ret = hid_sensor_setup_trigger(indio_dev, name,
&magn_state->common_attributes);
if (ret < 0) {
@@ -363,14 +384,11 @@ static int hid_magn_3d_probe(struct platform_device *pdev)
error_iio_unreg:
iio_device_unregister(indio_dev);
error_remove_trigger:
- hid_sensor_remove_trigger(indio_dev);
+ 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);
-error_free_dev:
- iio_device_free(indio_dev);
-error_ret:
return ret;
}
@@ -379,20 +397,30 @@ 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(indio_dev);
+ hid_sensor_remove_trigger(&magn_state->common_attributes);
iio_triggered_buffer_cleanup(indio_dev);
kfree(indio_dev->channels);
- iio_device_free(indio_dev);
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 = DRIVER_NAME,
+ .name = KBUILD_MODNAME,
.owner = THIS_MODULE,
},
.probe = hid_magn_3d_probe,
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
index 7e81d00ef0c..694e33e0fb7 100644
--- a/drivers/iio/magnetometer/st_magn.h
+++ b/drivers/iio/magnetometer/st_magn.h
@@ -18,7 +18,8 @@
#define LSM303DLM_MAGN_DEV_NAME "lsm303dlm_magn"
#define LIS3MDL_MAGN_DEV_NAME "lis3mdl"
-int st_magn_common_probe(struct iio_dev *indio_dev);
+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
diff --git a/drivers/iio/magnetometer/st_magn_buffer.c b/drivers/iio/magnetometer/st_magn_buffer.c
index 708857bdb47..bf427dc0d22 100644
--- a/drivers/iio/magnetometer/st_magn_buffer.c
+++ b/drivers/iio/magnetometer/st_magn_buffer.c
@@ -25,16 +25,7 @@
static int st_magn_buffer_preenable(struct iio_dev *indio_dev)
{
- int err;
-
- err = st_sensors_set_enable(indio_dev, true);
- if (err < 0)
- goto st_magn_set_enable_error;
-
- err = iio_sw_buffer_preenable(indio_dev);
-
-st_magn_set_enable_error:
- return err;
+ return st_sensors_set_enable(indio_dev, true);
}
static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index ebfe8f11a0c..240a21dd0c6 100644
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -29,9 +29,9 @@
#define ST_MAGN_NUMBER_DATA_CHANNELS 3
/* DEFAULT VALUE FOR SENSORS */
-#define ST_MAGN_DEFAULT_OUT_X_L_ADDR 0X04
-#define ST_MAGN_DEFAULT_OUT_Y_L_ADDR 0X08
-#define ST_MAGN_DEFAULT_OUT_Z_L_ADDR 0X06
+#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
@@ -117,16 +117,16 @@
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_LE, 16, 16,
- ST_MAGN_DEFAULT_OUT_X_L_ADDR),
+ 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_LE, 16, 16,
- ST_MAGN_DEFAULT_OUT_Y_L_ADDR),
+ 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_LE, 16, 16,
- ST_MAGN_DEFAULT_OUT_Z_L_ADDR),
+ 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)
};
@@ -345,18 +345,22 @@ static const struct iio_info magn_info = {
.write_raw = &st_magn_write_raw,
};
-int st_magn_common_probe(struct iio_dev *indio_dev)
+int st_magn_common_probe(struct iio_dev *indio_dev,
+ struct st_sensors_platform_data *pdata)
{
- int err;
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)
- goto st_magn_common_probe_error;
+ return err;
mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS;
mdata->multiread_bit = mdata->sensor->multi_read_bit;
@@ -367,14 +371,15 @@ int st_magn_common_probe(struct iio_dev *indio_dev)
&mdata->sensor->fs.fs_avl[0];
mdata->odr = mdata->sensor->odr.odr_avl[0].hz;
- err = st_sensors_init_sensor(indio_dev);
+ err = st_sensors_init_sensor(indio_dev, pdata);
if (err < 0)
- goto st_magn_common_probe_error;
+ return err;
- if (mdata->get_irq_data_ready(indio_dev) > 0) {
- err = st_magn_allocate_ring(indio_dev);
- if (err < 0)
- goto st_magn_common_probe_error;
+ 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;
@@ -384,15 +389,17 @@ int st_magn_common_probe(struct iio_dev *indio_dev)
if (err)
goto st_magn_device_register_error;
- return err;
+ dev_info(&indio_dev->dev, "registered magnetometer %s\n",
+ indio_dev->name);
+
+ return 0;
st_magn_device_register_error:
- if (mdata->get_irq_data_ready(indio_dev) > 0)
+ if (irq > 0)
st_sensors_deallocate_trigger(indio_dev);
st_magn_probe_trigger_error:
- if (mdata->get_irq_data_ready(indio_dev) > 0)
- st_magn_deallocate_ring(indio_dev);
-st_magn_common_probe_error:
+ st_magn_deallocate_ring(indio_dev);
+
return err;
}
EXPORT_SYMBOL(st_magn_common_probe);
@@ -401,12 +408,13 @@ 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) {
+ if (mdata->get_irq_data_ready(indio_dev) > 0)
st_sensors_deallocate_trigger(indio_dev);
- st_magn_deallocate_ring(indio_dev);
- }
- iio_device_free(indio_dev);
+
+ st_magn_deallocate_ring(indio_dev);
}
EXPORT_SYMBOL(st_magn_common_remove);
diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c
index e6adc4a8642..892e0feeb5c 100644
--- a/drivers/iio/magnetometer/st_magn_i2c.c
+++ b/drivers/iio/magnetometer/st_magn_i2c.c
@@ -25,27 +25,20 @@ static int st_magn_i2c_probe(struct i2c_client *client,
struct st_sensor_data *mdata;
int err;
- indio_dev = iio_device_alloc(sizeof(*mdata));
- if (indio_dev == NULL) {
- err = -ENOMEM;
- goto iio_device_alloc_error;
- }
+ 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);
+ err = st_magn_common_probe(indio_dev, NULL);
if (err < 0)
- goto st_magn_common_probe_error;
+ return err;
return 0;
-
-st_magn_common_probe_error:
- iio_device_free(indio_dev);
-iio_device_alloc_error:
- return err;
}
static int st_magn_i2c_remove(struct i2c_client *client)
diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c
index 51adb797cb7..a6143ea51df 100644
--- a/drivers/iio/magnetometer/st_magn_spi.c
+++ b/drivers/iio/magnetometer/st_magn_spi.c
@@ -24,27 +24,20 @@ static int st_magn_spi_probe(struct spi_device *spi)
struct st_sensor_data *mdata;
int err;
- indio_dev = iio_device_alloc(sizeof(*mdata));
- if (indio_dev == NULL) {
- err = -ENOMEM;
- goto iio_device_alloc_error;
- }
+ 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);
+ err = st_magn_common_probe(indio_dev, NULL);
if (err < 0)
- goto st_magn_common_probe_error;
+ return err;
return 0;
-
-st_magn_common_probe_error:
- iio_device_free(indio_dev);
-iio_device_alloc_error:
- return err;
}
static int st_magn_spi_remove(struct spi_device *spi)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 23:27:11 +0000