- 根目录:
- drivers
- staging
- iio
- magnetometer
- hmc5843.c
/* Copyright (C) 2010 Texas Instruments
Author: Shubhrajyoti Datta <shubhrajyoti@ti.com>
Acknowledgement: Jonathan Cameron <jic23@kernel.org> for valuable inputs.
Support for HMC5883 and HMC5883L by Peter Meerwald <pmeerw@pmeerw.net>.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#define HMC5843_CONFIG_REG_A 0x00
#define HMC5843_CONFIG_REG_B 0x01
#define HMC5843_MODE_REG 0x02
#define HMC5843_DATA_OUT_X_MSB_REG 0x03
#define HMC5843_DATA_OUT_X_LSB_REG 0x04
#define HMC5843_DATA_OUT_Y_MSB_REG 0x05
#define HMC5843_DATA_OUT_Y_LSB_REG 0x06
#define HMC5843_DATA_OUT_Z_MSB_REG 0x07
#define HMC5843_DATA_OUT_Z_LSB_REG 0x08
/* Beware: Y and Z are exchanged on HMC5883 */
#define HMC5883_DATA_OUT_Z_MSB_REG 0x05
#define HMC5883_DATA_OUT_Z_LSB_REG 0x06
#define HMC5883_DATA_OUT_Y_MSB_REG 0x07
#define HMC5883_DATA_OUT_Y_LSB_REG 0x08
#define HMC5843_STATUS_REG 0x09
#define HMC5843_ID_REG_A 0x0A
#define HMC5843_ID_REG_B 0x0B
#define HMC5843_ID_REG_C 0x0C
enum hmc5843_ids {
HMC5843_ID,
HMC5883_ID,
HMC5883L_ID,
};
/*
* Beware: identification of the HMC5883 is still "H43";
* I2C address is also unchanged
*/
#define HMC5843_ID_REG_LENGTH 0x03
#define HMC5843_ID_STRING "H43"
#define HMC5843_I2C_ADDRESS 0x1E
/*
* Range gain settings in (+-)Ga
* Beware: HMC5843 and HMC5883 have different recommended sensor field
* ranges; default corresponds to +-1.0 Ga and +-1.3 Ga, respectively
*/
#define HMC5843_RANGE_GAIN_OFFSET 0x05
#define HMC5843_RANGE_GAIN_DEFAULT 0x01
#define HMC5843_RANGE_GAIN_MAX 0x07
/*
* Device status
*/
#define HMC5843_DATA_READY 0x01
#define HMC5843_DATA_OUTPUT_LOCK 0x02
/* Does not exist on HMC5883, not used */
#define HMC5843_VOLTAGE_REGULATOR_ENABLED 0x04
/*
* Mode register configuration
*/
#define HMC5843_MODE_CONVERSION_CONTINUOUS 0x00
#define HMC5843_MODE_CONVERSION_SINGLE 0x01
#define HMC5843_MODE_IDLE 0x02
#define HMC5843_MODE_SLEEP 0x03
#define HMC5843_MODE_MASK 0x03
/*
* HMC5843: Minimum data output rate
* HMC5883: Typical data output rate
*/
#define HMC5843_RATE_OFFSET 0x02
#define HMC5843_RATE_BITMASK 0x1C
#define HMC5843_RATE_NOT_USED 0x07
/*
* Device measurement configuration
*/
#define HMC5843_MEAS_CONF_NORMAL 0x00
#define HMC5843_MEAS_CONF_POSITIVE_BIAS 0x01
#define HMC5843_MEAS_CONF_NEGATIVE_BIAS 0x02
#define HMC5843_MEAS_CONF_NOT_USED 0x03
#define HMC5843_MEAS_CONF_MASK 0x03
/*
* Scaling factors: 10000000/Gain
*/
static const int hmc5843_regval_to_nanoscale[] = {
6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714
};
static const int hmc5883_regval_to_nanoscale[] = {
7812, 9766, 13021, 16287, 24096, 27701, 32573, 45662
};
static const int hmc5883l_regval_to_nanoscale[] = {
7299, 9174, 12195, 15152, 22727, 25641, 30303, 43478
};
/*
* From the HMC5843 datasheet:
* Value | Sensor input field range (Ga) | Gain (counts/milli-Gauss)
* 0 | (+-)0.7 | 1620
* 1 | (+-)1.0 | 1300
* 2 | (+-)1.5 | 970
* 3 | (+-)2.0 | 780
* 4 | (+-)3.2 | 530
* 5 | (+-)3.8 | 460
* 6 | (+-)4.5 | 390
* 7 | (+-)6.5 | 280
*
* From the HMC5883 datasheet:
* Value | Recommended sensor field range (Ga) | Gain (counts/Gauss)
* 0 | (+-)0.9 | 1280
* 1 | (+-)1.2 | 1024
* 2 | (+-)1.9 | 768
* 3 | (+-)2.5 | 614
* 4 | (+-)4.0 | 415
* 5 | (+-)4.6 | 361
* 6 | (+-)5.5 | 307
* 7 | (+-)7.9 | 219
*
* From the HMC5883L datasheet:
* Value | Recommended sensor field range (Ga) | Gain (LSB/Gauss)
* 0 | (+-)0.88 | 1370
* 1 | (+-)1.3 | 1090
* 2 | (+-)1.9 | 820
* 3 | (+-)2.5 | 660
* 4 | (+-)4.0 | 440
* 5 | (+-)4.7 | 390
* 6 | (+-)5.6 | 330
* 7 | (+-)8.1 | 230
*/
static const int hmc5843_regval_to_input_field_mga[] = {
700, 1000, 1500, 2000, 3200, 3800, 4500, 6500
};
static const int hmc5883_regval_to_input_field_mga[] = {
900, 1200, 1900, 2500, 4000, 4600, 5500, 7900
};
static const int hmc5883l_regval_to_input_field_mga[] = {
880, 1300, 1900, 2500, 4000, 4700, 5600, 8100
};
/*
* From the datasheet:
* Value | HMC5843 | HMC5883/HMC5883L
* | Data output rate (Hz) | Data output rate (Hz)
* 0 | 0.5 | 0.75
* 1 | 1 | 1.5
* 2 | 2 | 3
* 3 | 5 | 7.5
* 4 | 10 (default) | 15
* 5 | 20 | 30
* 6 | 50 | 75
* 7 | Not used | Not used
*/
static const char * const hmc5843_regval_to_sample_freq[] = {
"0.5", "1", "2", "5", "10", "20", "50",
};
static const char * const hmc5883_regval_to_sample_freq[] = {
"0.75", "1.5", "3", "7.5", "15", "30", "75",
};
/* Addresses to scan: 0x1E */
static const unsigned short normal_i2c[] = { HMC5843_I2C_ADDRESS,
I2C_CLIENT_END };
/* Describe chip variants */
struct hmc5843_chip_info {
const struct iio_chan_spec *channels;
int num_channels;
const char * const *regval_to_sample_freq;
const int *regval_to_input_field_mga;
const int *regval_to_nanoscale;
};
/* Each client has this additional data */
struct hmc5843_data {
struct mutex lock;
u8 rate;
u8 meas_conf;
u8 operating_mode;
u8 range;
const struct hmc5843_chip_info *variant;
};
/* The lower two bits contain the current conversion mode */
static s32 hmc5843_configure(struct i2c_client *client,
u8 operating_mode)
{
return i2c_smbus_write_byte_data(client,
HMC5843_MODE_REG,
operating_mode & HMC5843_MODE_MASK);
}
/* Return the measurement value from the specified channel */
static int hmc5843_read_measurement(struct iio_dev *indio_dev,
int address,
int *val)
{
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct hmc5843_data *data = iio_priv(indio_dev);
s32 result;
mutex_lock(&data->lock);
result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG);
while (!(result & HMC5843_DATA_READY))
result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG);
result = i2c_smbus_read_word_data(client, address);
mutex_unlock(&data->lock);
if (result < 0)
return -EINVAL;
*val = (s16)swab16((u16)result);
return IIO_VAL_INT;
}
/*
* From the datasheet:
* 0 - Continuous-Conversion Mode: In continuous-conversion mode, the
* device continuously performs conversions and places the result in
* the data register.
*
* 1 - Single-Conversion Mode : Device performs a single measurement,
* sets RDY high and returns to sleep mode.
*
* 2 - Idle Mode : Device is placed in idle mode.
*
* 3 - Sleep Mode : Device is placed in sleep mode.
*
*/
static ssize_t hmc5843_show_operating_mode(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct hmc5843_data *data = iio_priv(indio_dev);
return sprintf(buf, "%d\n", data->operating_mode);
}
static ssize_t hmc5843_set_operating_mode(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct hmc5843_data *data = iio_priv(indio_dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
unsigned long operating_mode = 0;
s32 status;
int error;
mutex_lock(&data->lock);
error = kstrtoul(buf, 10, &operating_mode);
if (error) {
count = error;
goto exit;
}
dev_dbg(dev, "set conversion mode to %lu\n", operating_mode);
if (operating_mode > HMC5843_MODE_SLEEP) {
count = -EINVAL;
goto exit;
}
status = i2c_smbus_write_byte_data(client, this_attr->address,
operating_mode);
if (status) {
count = -EINVAL;
goto exit;
}
data->operating_mode = operating_mode;
exit:
mutex_unlock(&data->lock);
return count;
}
static IIO_DEVICE_ATTR(operating_mode,
S_IWUSR | S_IRUGO,
hmc5843_show_operating_mode,
hmc5843_set_operating_mode,
HMC5843_MODE_REG);
/*
* API for setting the measurement configuration to
* Normal, Positive bias and Negative bias
*
* From the datasheet:
* 0 - Normal measurement configuration (default): In normal measurement
* configuration the device follows normal measurement flow. Pins BP
* and BN are left floating and high impedance.
*
* 1 - Positive bias configuration: In positive bias configuration, a
* positive current is forced across the resistive load on pins BP
* and BN.
*
* 2 - Negative bias configuration. In negative bias configuration, a
* negative current is forced across the resistive load on pins BP
* and BN.
*
*/
static s32 hmc5843_set_meas_conf(struct i2c_client *client,
u8 meas_conf)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct hmc5843_data *data = iio_priv(indio_dev);
u8 reg_val;
reg_val = (meas_conf & HMC5843_MEAS_CONF_MASK) |
(data->rate << HMC5843_RATE_OFFSET);
return i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_A, reg_val);
}
static ssize_t hmc5843_show_measurement_configuration(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct hmc5843_data *data = iio_priv(indio_dev);
return sprintf(buf, "%d\n", data->meas_conf);
}
static ssize_t hmc5843_set_measurement_configuration(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct hmc5843_data *data = iio_priv(indio_dev);
unsigned long meas_conf = 0;
int error;
error = kstrtoul(buf, 10, &meas_conf);
if (error)
return error;
if (meas_conf >= HMC5843_MEAS_CONF_NOT_USED)
return -EINVAL;
mutex_lock(&data->lock);
dev_dbg(dev, "set measurement configuration to %lu\n", meas_conf);
if (hmc5843_set_meas_conf(client, meas_conf)) {
count = -EINVAL;
goto exit;
}
data->meas_conf = meas_conf;
exit:
mutex_unlock(&data->lock);
return count;
}
static IIO_DEVICE_ATTR(meas_conf,
S_IWUSR | S_IRUGO,
hmc5843_show_measurement_configuration,
hmc5843_set_measurement_configuration,
0);
static ssize_t hmc5843_show_sampling_frequencies_available(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct hmc5843_data *data = iio_priv(indio_dev);
ssize_t total_n = 0;
int i;
for (i = 0; i < HMC5843_RATE_NOT_USED; i++) {
ssize_t n = sprintf(buf, "%s ", data->variant->regval_to_sample_freq[i]);
buf += n;
total_n += n;
}
/* replace trailing space by newline */
buf[-1] = '\n';
return total_n;
}
static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(hmc5843_show_sampling_frequencies_available);
static s32 hmc5843_set_rate(struct i2c_client *client,
u8 rate)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct hmc5843_data *data = iio_priv(indio_dev);
u8 reg_val;
if (rate >= HMC5843_RATE_NOT_USED) {
dev_err(&client->dev,
"data output rate is not supported\n");
return -EINVAL;
}
reg_val = data->meas_conf | (rate << HMC5843_RATE_OFFSET);
return i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_A, reg_val);
}
static int hmc5843_check_sampling_frequency(struct hmc5843_data *data,
const char *buf)
{
const char * const *samp_freq = data->variant->regval_to_sample_freq;
int i;
for (i = 0; i < HMC5843_RATE_NOT_USED; i++) {
if (sysfs_streq(buf, samp_freq[i]))
return i;
}
return -EINVAL;
}
static ssize_t hmc5843_set_sampling_frequency(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct hmc5843_data *data = iio_priv(indio_dev);
int rate;
rate = hmc5843_check_sampling_frequency(data, buf);
if (rate < 0) {
dev_err(&client->dev,
"sampling frequency is not supported\n");
return rate;
}
mutex_lock(&data->lock);
dev_dbg(dev, "set rate to %d\n", rate);
if (hmc5843_set_rate(client, rate)) {
count = -EINVAL;
goto exit;
}
data->rate = rate;
exit:
mutex_unlock(&data->lock);
return count;
}
static ssize_t hmc5843_show_sampling_frequency(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
struct hmc5843_data *data = iio_priv(indio_dev);
s32 rate;
rate = i2c_smbus_read_byte_data(client, this_attr->address);
if (rate < 0)
return rate;
rate = (rate & HMC5843_RATE_BITMASK) >> HMC5843_RATE_OFFSET;
return sprintf(buf, "%s\n", data->variant->regval_to_sample_freq[rate]);
}
static IIO_DEVICE_ATTR(sampling_frequency,
S_IWUSR | S_IRUGO,
hmc5843_show_sampling_frequency,
hmc5843_set_sampling_frequency,
HMC5843_CONFIG_REG_A);
static ssize_t hmc5843_show_range_gain(struct device *dev,
struct device_attribute *attr,
char *buf)
{
u8 range;
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct hmc5843_data *data = iio_priv(indio_dev);
range = data->range;
return sprintf(buf, "%d\n", data->variant->regval_to_input_field_mga[range]);
}
static ssize_t hmc5843_set_range_gain(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
struct hmc5843_data *data = iio_priv(indio_dev);
unsigned long range = 0;
int error;
mutex_lock(&data->lock);
error = kstrtoul(buf, 10, &range);
if (error) {
count = error;
goto exit;
}
dev_dbg(dev, "set range to %lu\n", range);
if (range > HMC5843_RANGE_GAIN_MAX) {
count = -EINVAL;
goto exit;
}
data->range = range;
range = range << HMC5843_RANGE_GAIN_OFFSET;
if (i2c_smbus_write_byte_data(client, this_attr->address, range))
count = -EINVAL;
exit:
mutex_unlock(&data->lock);
return count;
}
static IIO_DEVICE_ATTR(in_magn_range,
S_IWUSR | S_IRUGO,
hmc5843_show_range_gain,
hmc5843_set_range_gain,
HMC5843_CONFIG_REG_B);
static int hmc5843_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2,
long mask)
{
struct hmc5843_data *data = iio_priv(indio_dev);
switch (mask) {
case IIO_CHAN_INFO_RAW:
return hmc5843_read_measurement(indio_dev,
chan->address,
val);
case IIO_CHAN_INFO_SCALE:
*val = 0;
*val2 = data->variant->regval_to_nanoscale[data->range];
return IIO_VAL_INT_PLUS_NANO;
}
return -EINVAL;
}
#define HMC5843_CHANNEL(axis, add) \
{ \
.type = IIO_MAGN, \
.modified = 1, \
.channel2 = IIO_MOD_##axis, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
.address = add \
}
static const struct iio_chan_spec hmc5843_channels[] = {
HMC5843_CHANNEL(X, HMC5843_DATA_OUT_X_MSB_REG),
HMC5843_CHANNEL(Y, HMC5843_DATA_OUT_Y_MSB_REG),
HMC5843_CHANNEL(Z, HMC5843_DATA_OUT_Z_MSB_REG),
};
static const struct iio_chan_spec hmc5883_channels[] = {
HMC5843_CHANNEL(X, HMC5843_DATA_OUT_X_MSB_REG),
HMC5843_CHANNEL(Y, HMC5883_DATA_OUT_Y_MSB_REG),
HMC5843_CHANNEL(Z, HMC5883_DATA_OUT_Z_MSB_REG),
};
static struct attribute *hmc5843_attributes[] = {
&iio_dev_attr_meas_conf.dev_attr.attr,
&iio_dev_attr_operating_mode.dev_attr.attr,
&iio_dev_attr_sampling_frequency.dev_attr.attr,
&iio_dev_attr_in_magn_range.dev_attr.attr,
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
NULL
};
static const struct attribute_group hmc5843_group = {
.attrs = hmc5843_attributes,
};
static const struct hmc5843_chip_info hmc5843_chip_info_tbl[] = {
[HMC5843_ID] = {
.channels = hmc5843_channels,
.num_channels = ARRAY_SIZE(hmc5843_channels),
.regval_to_sample_freq = hmc5843_regval_to_sample_freq,
.regval_to_input_field_mga =
hmc5843_regval_to_input_field_mga,
.regval_to_nanoscale = hmc5843_regval_to_nanoscale,
},
[HMC5883_ID] = {
.channels = hmc5883_channels,
.num_channels = ARRAY_SIZE(hmc5883_channels),
.regval_to_sample_freq = hmc5883_regval_to_sample_freq,
.regval_to_input_field_mga =
hmc5883_regval_to_input_field_mga,
.regval_to_nanoscale = hmc5883_regval_to_nanoscale,
},
[HMC5883L_ID] = {
.channels = hmc5883_channels,
.num_channels = ARRAY_SIZE(hmc5883_channels),
.regval_to_sample_freq = hmc5883_regval_to_sample_freq,
.regval_to_input_field_mga =
hmc5883l_regval_to_input_field_mga,
.regval_to_nanoscale = hmc5883l_regval_to_nanoscale,
},
};
static int hmc5843_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
unsigned char id_str[HMC5843_ID_REG_LENGTH];
if (client->addr != HMC5843_I2C_ADDRESS)
return -ENODEV;
if (i2c_smbus_read_i2c_block_data(client, HMC5843_ID_REG_A,
HMC5843_ID_REG_LENGTH, id_str)
!= HMC5843_ID_REG_LENGTH)
return -ENODEV;
if (0 != strncmp(id_str, HMC5843_ID_STRING, HMC5843_ID_REG_LENGTH))
return -ENODEV;
return 0;
}
/* Called when we have found a new HMC58X3 */
static void hmc5843_init_client(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct hmc5843_data *data = iio_priv(indio_dev);
data->variant = &hmc5843_chip_info_tbl[id->driver_data];
indio_dev->channels = data->variant->channels;
indio_dev->num_channels = data->variant->num_channels;
hmc5843_set_meas_conf(client, data->meas_conf);
hmc5843_set_rate(client, data->rate);
hmc5843_configure(client, data->operating_mode);
i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_B, data->range);
mutex_init(&data->lock);
pr_info("%s initialized\n", id->name);
}
static const struct iio_info hmc5843_info = {
.attrs = &hmc5843_group,
.read_raw = &hmc5843_read_raw,
.driver_module = THIS_MODULE,
};
static int hmc5843_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct hmc5843_data *data;
struct iio_dev *indio_dev;
int err = 0;
indio_dev = iio_device_alloc(sizeof(*data));
if (indio_dev == NULL) {
err = -ENOMEM;
goto exit;
}
/* default settings at probe */
data = iio_priv(indio_dev);
data->meas_conf = HMC5843_MEAS_CONF_NORMAL;
data->range = HMC5843_RANGE_GAIN_DEFAULT;
data->operating_mode = HMC5843_MODE_CONVERSION_CONTINUOUS;
i2c_set_clientdata(client, indio_dev);
hmc5843_init_client(client, id);
indio_dev->info = &hmc5843_info;
indio_dev->name = id->name;
indio_dev->dev.parent = &client->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
err = iio_device_register(indio_dev);
if (err)
goto exit_free2;
return 0;
exit_free2:
iio_device_free(indio_dev);
exit:
return err;
}
static int hmc5843_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
iio_device_unregister(indio_dev);
/* sleep mode to save power */
hmc5843_configure(client, HMC5843_MODE_SLEEP);
iio_device_free(indio_dev);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int hmc5843_suspend(struct device *dev)
{
hmc5843_configure(to_i2c_client(dev), HMC5843_MODE_SLEEP);
return 0;
}
static int hmc5843_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct hmc5843_data *data = iio_priv(indio_dev);
hmc5843_configure(client, data->operating_mode);
return 0;
}
static SIMPLE_DEV_PM_OPS(hmc5843_pm_ops, hmc5843_suspend, hmc5843_resume);
#define HMC5843_PM_OPS (&hmc5843_pm_ops)
#else
#define HMC5843_PM_OPS NULL
#endif
static const struct i2c_device_id hmc5843_id[] = {
{ "hmc5843", HMC5843_ID },
{ "hmc5883", HMC5883_ID },
{ "hmc5883l", HMC5883L_ID },
{ }
};
MODULE_DEVICE_TABLE(i2c, hmc5843_id);
static struct i2c_driver hmc5843_driver = {
.driver = {
.name = "hmc5843",
.pm = HMC5843_PM_OPS,
},
.id_table = hmc5843_id,
.probe = hmc5843_probe,
.remove = hmc5843_remove,
.detect = hmc5843_detect,
.address_list = normal_i2c,
};
module_i2c_driver(hmc5843_driver);
MODULE_AUTHOR("Shubhrajyoti Datta <shubhrajyoti@ti.com");
MODULE_DESCRIPTION("HMC5843/5883/5883L driver");
MODULE_LICENSE("GPL");