> -----Original Message----- > From: Barry Song [mailto:21cnbao@xxxxxxxxx] > Sent: Wednesday, July 21, 2010 1:19 PM > To: Datta, Shubhrajyoti > Cc: linux-iio@xxxxxxxxxxxxxxx; gregkh@xxxxxxx > Subject: Re: [PATCH] digital compass hmc5843 > > The patch should be sent to Jonathan Cameron <jic23@xxxxxxxxx>. > -barry Sure > > On Sat, Jul 17, 2010 at 9:02 PM, Shubhrajyoti D <shubhrajyoti@xxxxxx> > wrote: > > Adding support for the Honeywell HMC5843. The interface to the device is > > i2c > > > > TODO: > > Adding the documentation > > > > Signed-off-by: Shubhrajyoti D <shubhrajyoti@xxxxxx> > > Acked-by: Jonathan Cameron <jic23@xxxxxxxxx> > > --- > > drivers/staging/iio/Kconfig | 1 + > > drivers/staging/iio/Makefile | 1 + > > drivers/staging/iio/magnetometer/Kconfig | 15 + > > drivers/staging/iio/magnetometer/Makefile | 5 + > > drivers/staging/iio/magnetometer/hmc5843.c | 624 > ++++++++++++++++++++++++++++ > > 5 files changed, 646 insertions(+), 0 deletions(-) > > create mode 100644 drivers/staging/iio/magnetometer/Kconfig > > create mode 100644 drivers/staging/iio/magnetometer/Makefile > > create mode 100644 drivers/staging/iio/magnetometer/hmc5843.c > > > > diff --git a/drivers/staging/iio/Kconfig b/drivers/staging/iio/Kconfig > > index b0e6244..569b938 100644 > > --- a/drivers/staging/iio/Kconfig > > +++ b/drivers/staging/iio/Kconfig > > @@ -44,6 +44,7 @@ source "drivers/staging/iio/adc/Kconfig" > > source "drivers/staging/iio/gyro/Kconfig" > > source "drivers/staging/iio/imu/Kconfig" > > source "drivers/staging/iio/light/Kconfig" > > +source "drivers/staging/iio/magnetometer/Kconfig" > > > > source "drivers/staging/iio/trigger/Kconfig" > > > > diff --git a/drivers/staging/iio/Makefile b/drivers/staging/iio/Makefile > > index 3502b39..10d1f6b 100644 > > --- a/drivers/staging/iio/Makefile > > +++ b/drivers/staging/iio/Makefile > > @@ -14,5 +14,6 @@ obj-y += adc/ > > obj-y += gyro/ > > obj-y += imu/ > > obj-y += light/ > > +obj-y += magnetometer/ > > > > obj-y += trigger/ > > \ No newline at end of file > > diff --git a/drivers/staging/iio/magnetometer/Kconfig > b/drivers/staging/iio/magnetometer/Kconfig > > new file mode 100644 > > index 0000000..d014450 > > --- /dev/null > > +++ b/drivers/staging/iio/magnetometer/Kconfig > > @@ -0,0 +1,15 @@ > > +# > > +# Magnetometer sensors > > +# > > +comment "Magnetometer sensors" > > + > > +config SENSORS_HMC5843 > > + tristate "Honeywell HMC5843 3-Axis Magnetometer" > > + depends on I2C > > + help > > + Say Y here to add support for the Honeywell HMC 5843 3-Axis > > + Magnetometer (digital compass). > > + > > + To compile this driver as a module, choose M here: the module > > + will be called hmc5843 > > + > > diff --git a/drivers/staging/iio/magnetometer/Makefile > b/drivers/staging/iio/magnetometer/Makefile > > new file mode 100644 > > index 0000000..f9bfb2e > > --- /dev/null > > +++ b/drivers/staging/iio/magnetometer/Makefile > > @@ -0,0 +1,5 @@ > > +# > > +# Makefile for industrial I/O Magnetometer sensors > > +# > > + > > +obj-$(CONFIG_SENSORS_HMC5843) += hmc5843.o > > diff --git a/drivers/staging/iio/magnetometer/hmc5843.c > b/drivers/staging/iio/magnetometer/hmc5843.c > > new file mode 100644 > > index 0000000..92f6c6f > > --- /dev/null > > +++ b/drivers/staging/iio/magnetometer/hmc5843.c > > @@ -0,0 +1,624 @@ > > +/* Copyright (C) 2010 Texas Instruments > > + Author: Shubhrajyoti Datta <shubhrajyoti@xxxxxx> > > + Acknowledgement: Jonathan Cameron <jic23@xxxxxxxxx> for valuable > inputs. > > + > > + 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 "../iio.h" > > +#include "../sysfs.h" > > +#include "magnet.h" > > + > > +#define HMC5843_I2C_ADDRESS 0x1E > > + > > +#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 > > +#define HMC5843_STATUS_REG 0x09 > > +#define HMC5843_ID_REG_A 0x0A > > +#define HMC5843_ID_REG_B 0x0B > > +#define HMC5843_ID_REG_C 0x0C > > + > > +#define HMC5843_ID_REG_LENGTH 0x03 > > +#define HMC5843_ID_STRING "H43" > > + > > +/* > > + * Range settings in (+-)Ga > > + * */ > > +#define RANGE_GAIN_OFFSET 0x05 > > + > > +#define RANGE_0_7 0x00 > > +#define RANGE_1_0 0x01 /* default > */ > > +#define RANGE_1_5 0x02 > > +#define RANGE_2_0 0x03 > > +#define RANGE_3_2 0x04 > > +#define RANGE_3_8 0x05 > > +#define RANGE_4_5 0x06 > > +#define RANGE_6_5 0x07 /* Not > recommended */ > > + > > +/* > > + * Device status > > + */ > > +#define DATA_READY 0x01 > > +#define DATA_OUTPUT_LOCK 0x02 > > +#define VOLTAGE_REGULATOR_ENABLED 0x04 > > + > > +/* > > + * Mode register configuration > > + */ > > +#define MODE_CONVERSION_CONTINUOUS 0x00 > > +#define MODE_CONVERSION_SINGLE 0x01 > > +#define MODE_IDLE 0x02 > > +#define MODE_SLEEP 0x03 > > + > > +/* Minimum Data Output Rate in 1/10 Hz */ > > +#define RATE_OFFSET 0x02 > > +#define RATE_BITMASK 0x1C > > +#define RATE_5 0x00 > > +#define RATE_10 0x01 > > +#define RATE_20 0x02 > > +#define RATE_50 0x03 > > +#define RATE_100 0x04 > > +#define RATE_200 0x05 > > +#define RATE_500 0x06 > > +#define RATE_NOT_USED 0x07 > > + > > +/* > > + * Device Configutration > > + */ > > +#define CONF_NORMAL 0x00 > > +#define CONF_POSITIVE_BIAS 0x01 > > +#define CONF_NEGATIVE_BIAS 0x02 > > +#define CONF_NOT_USED 0x03 > > +#define MEAS_CONF_MASK 0x03 > > + > > +static const int regval_to_counts_per_mg[] = { > > + 1620, > > + 1300, > > + 970, > > + 780, > > + 530, > > + 460, > > + 390, > > + 280 > > +}; > > +static const int regval_to_input_field_mg[] = { > > + 700, > > + 1000, > > + 1500, > > + 2000, > > + 3200, > > + 3800, > > + 4500, > > + 6500 > > +}; > > +static const char *regval_to_samp_freq[] = { > > + "0.5", > > + "1", > > + "2", > > + "5", > > + "10", > > + "20", > > + "50", > > +}; > > + > > +/* Addresses to scan: 0x1E */ > > +static const unsigned short normal_i2c[] = { HMC5843_I2C_ADDRESS, > > + I2C_CLIENT_END > }; > > + > > +/* Each client has this additional data */ > > +struct hmc5843_data { > > + struct iio_dev *indio_dev; > > + struct mutex lock; > > + u8 rate; > > + u8 meas_conf; > > + u8 operating_mode; > > + u8 range; > > +}; > > + > > +static void hmc5843_init_client(struct i2c_client *client); > > + > > +static s32 hmc5843_configure(struct i2c_client *client, > > + u8 operating_mode) > > +{ > > + /* The lower two bits contain the current conversion mode */ > > + return i2c_smbus_write_byte_data(client, > > + HMC5843_MODE_REG, > > + (operating_mode & 0x03)); > > +} > > + > > +/* Return the measurement value from the specified channel */ > > +static ssize_t hmc5843_read_measurement(struct device *dev, > > + struct device_attribute *attr, > > + char *buf) > > +{ > > + struct iio_dev *indio_dev = dev_get_drvdata(dev); > > + struct i2c_client *client = to_i2c_client(indio_dev- > >dev.parent); > > + s16 coordinate_val; > > + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); > > + struct hmc5843_data *data = indio_dev->dev_data; > > + s32 result; > > + > > + mutex_lock(&data->lock); > > + > > + result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG); > > + while (!(result & DATA_READY)) > > + result = i2c_smbus_read_byte_data(client, > HMC5843_STATUS_REG); > > + > > + result = i2c_smbus_read_word_data(client, this_attr->address); > > + mutex_unlock(&data->lock); > > + if (result < 0) > > + return -EINVAL; > > + > > + coordinate_val = (s16)swab16((u16)result); > > + return sprintf(buf, "%d\n", coordinate_val); > > +} > > +static IIO_DEV_ATTR_MAGN_X(hmc5843_read_measurement, > > + HMC5843_DATA_OUT_X_MSB_REG); > > +static IIO_DEV_ATTR_MAGN_Y(hmc5843_read_measurement, > > + HMC5843_DATA_OUT_Y_MSB_REG); > > +static IIO_DEV_ATTR_MAGN_Z(hmc5843_read_measurement, > > + HMC5843_DATA_OUT_Z_MSB_REG); > > + > > +/* > > + * From the datasheet > > + * 0 - Continuous-Conversion Mode: In continuous-conversion mode, the > > + * device continuously performs conversions an places the result in the > > + * data register. > > + * > > + * 1 - Single-Conversion Mode : device performs a single measurement, > > + * sets RDY high and returned 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_get_drvdata(dev); > > + struct hmc5843_data *data = indio_dev->dev_data; > > + 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_get_drvdata(dev); > > + struct i2c_client *client = to_i2c_client(indio_dev- > >dev.parent); > > + struct hmc5843_data *data = indio_dev->dev_data; > > + 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 = strict_strtoul(buf, 10, &operating_mode); > > + if (error) > > + return error; > > + dev_dbg(dev, "set Conversion mode to %lu\n", operating_mode); > > + if (operating_mode > MODE_SLEEP) > > + return -EINVAL; > > + > > + 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 > > + * > > + * Normal measurement configuration (default): In normal measurement > > + * configuration the device follows normal measurement flow. Pins BP > and BN > > + * are left floating and high impedance. > > + * > > + * Positive bias configuration: In positive bias configuration, a > positive > > + * current is forced across the resistive load on pins BP and BN. > > + * > > + * 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 hmc5843_data *data = i2c_get_clientdata(client); > > + u8 reg_val; > > + reg_val = (meas_conf & MEAS_CONF_MASK) | (data->rate << > 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_get_drvdata(dev); > > + struct hmc5843_data *data = indio_dev->dev_data; > > + 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_get_drvdata(dev); > > + struct i2c_client *client = to_i2c_client(indio_dev- > >dev.parent); > > + struct hmc5843_data *data = i2c_get_clientdata(client); > > + unsigned long meas_conf = 0; > > + int error = strict_strtoul(buf, 10, &meas_conf); > > + if (error) > > + return error; > > + mutex_lock(&data->lock); > > + > > + dev_dbg(dev, "set mode 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); > > + > > +/* > > + * From Datasheet > > + * The table shows the minimum data output > > + * Value | Minimum data output rate(Hz) > > + * 0 | 0.5 > > + * 1 | 1 > > + * 2 | 2 > > + * 3 | 5 > > + * 4 | 10 (default) > > + * 5 | 20 > > + * 6 | 50 > > + * 7 | Not used > > + */ > > +static IIO_CONST_ATTR_AVAIL_SAMP_FREQ("0.5 1 2 5 10 20 50"); > > + > > +static s32 hmc5843_set_rate(struct i2c_client *client, > > + u8 rate) > > +{ > > + struct hmc5843_data *data = i2c_get_clientdata(client); > > + u8 reg_val; > > + > > + reg_val = (data->meas_conf) | (rate << RATE_OFFSET); > > + if (rate >= RATE_NOT_USED) { > > + dev_err(&client->dev, > > + "This data output rate is not supported \n"); > > + return -EINVAL; > > + } > > + return i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_A, > reg_val); > > +} > > + > > +static ssize_t set_sampling_frequency(struct device *dev, > > + struct device_attribute *attr, > > + const char *buf, size_t count) > > +{ > > + > > + struct iio_dev *indio_dev = dev_get_drvdata(dev); > > + struct i2c_client *client = to_i2c_client(indio_dev- > >dev.parent); > > + struct hmc5843_data *data = indio_dev->dev_data; > > + unsigned long rate = 0; > > + > > + if (strncmp(buf, "0.5" , 3) == 0) > > + rate = RATE_5; > > + else if (strncmp(buf, "1" , 1) == 0) > > + rate = RATE_10; > > + else if (strncmp(buf, "2", 1) == 0) > > + rate = RATE_20; > > + else if (strncmp(buf, "5", 1) == 0) > > + rate = RATE_50; > > + else if (strncmp(buf, "10", 2) == 0) > > + rate = RATE_100; > > + else if (strncmp(buf, "20" , 2) == 0) > > + rate = RATE_200; > > + else if (strncmp(buf, "50" , 2) == 0) > > + rate = RATE_500; > > + else > > + return -EINVAL; > > + > > + mutex_lock(&data->lock); > > + dev_dbg(dev, "set rate to %lu\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 show_sampling_frequency(struct device *dev, > > + struct device_attribute *attr, char *buf) > > +{ > > + struct iio_dev *indio_dev = dev_get_drvdata(dev); > > + struct i2c_client *client = to_i2c_client(indio_dev- > >dev.parent); > > + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); > > + u32 rate; > > + > > + rate = i2c_smbus_read_byte_data(client, this_attr->address); > > + if (rate < 0) > > + return -EINVAL; > > + rate = (rate & RATE_BITMASK) >> RATE_OFFSET; > > + return sprintf(buf, "%s\n", regval_to_samp_freq[rate]); > > +} > > +static IIO_DEVICE_ATTR(sampling_frequency, > > + S_IWUSR | S_IRUGO, > > + show_sampling_frequency, > > + set_sampling_frequency, > > + HMC5843_CONFIG_REG_A); > > + > > +/* > > + * From Datasheet > > + * Nominal gain settings > > + * 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 > > + */ > > +static ssize_t show_range(struct device *dev, > > + struct device_attribute *attr, > > + char *buf) > > +{ > > + u8 range; > > + struct iio_dev *indio_dev = dev_get_drvdata(dev); > > + struct hmc5843_data *data = indio_dev->dev_data; > > + > > + range = data->range; > > + return sprintf(buf, "%d\n", regval_to_input_field_mg[range]); > > +} > > + > > +static ssize_t set_range(struct device *dev, > > + struct device_attribute *attr, > > + const char *buf, > > + size_t count) > > +{ > > + struct iio_dev *indio_dev = dev_get_drvdata(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 = indio_dev->dev_data; > > + unsigned long range = 0; > > + int error; > > + mutex_lock(&data->lock); > > + error = strict_strtoul(buf, 10, &range); > > + if (error) > > + return error; > > + dev_dbg(dev, "set range to %lu\n", range); > > + > > + if (range > RANGE_6_5) > > + return -EINVAL; > > + > > + data->range = range; > > + range = range << RANGE_GAIN_OFFSET; > > + if (i2c_smbus_write_byte_data(client, this_attr->address, > range)) > > + count = -EINVAL; > > + > > + mutex_unlock(&data->lock); > > + return count; > > + > > +} > > +static IIO_DEVICE_ATTR(magn_range, > > + S_IWUSR | S_IRUGO, > > + show_range, > > + set_range, > > + HMC5843_CONFIG_REG_B); > > + > > +static ssize_t show_gain(struct device *dev, > > + struct device_attribute *attr, > > + char *buf) > > +{ > > + struct iio_dev *indio_dev = dev_get_drvdata(dev); > > + struct hmc5843_data *data = indio_dev->dev_data; > > + return sprintf(buf, "%d\n", regval_to_counts_per_mg[data- > >range]); > > +} > > +static IIO_DEVICE_ATTR(magn_gain, > > + S_IRUGO, > > + show_gain, > > + NULL , 0); > > + > > +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_magn_range.dev_attr.attr, > > + &iio_dev_attr_magn_gain.dev_attr.attr, > > + &iio_dev_attr_magn_x_raw.dev_attr.attr, > > + &iio_dev_attr_magn_y_raw.dev_attr.attr, > > + &iio_dev_attr_magn_z_raw.dev_attr.attr, > > + &iio_const_attr_available_sampling_frequency.dev_attr.attr, > > + NULL > > +}; > > + > > +static const struct attribute_group hmc5843_group = { > > + .attrs = hmc5843_attributes, > > +}; > > + > > +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 HMC5843. */ > > +static void hmc5843_init_client(struct i2c_client *client) > > +{ > > + struct hmc5843_data *data = i2c_get_clientdata(client); > > + 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("HMC5843 initialized\n"); > > +} > > + > > +static int hmc5843_probe(struct i2c_client *client, > > + const struct i2c_device_id *id) > > +{ > > + struct hmc5843_data *data; > > + int err = 0; > > + > > + data = kzalloc(sizeof(struct hmc5843_data), GFP_KERNEL); > > + if (!data) { > > + err = -ENOMEM; > > + goto exit; > > + } > > + > > + /* default settings at probe */ > > + > > + data->meas_conf = CONF_NORMAL; > > + data->range = RANGE_1_0; > > + data->operating_mode = MODE_CONVERSION_CONTINUOUS; > > + > > + i2c_set_clientdata(client, data); > > + > > + /* Initialize the HMC5843 chip */ > > + hmc5843_init_client(client); > > + > > + data->indio_dev = iio_allocate_device(); > > + if (!data->indio_dev) { > > + err = -ENOMEM; > > + goto exit_free1; > > + } > > + data->indio_dev->attrs = &hmc5843_group; > > + data->indio_dev->dev.parent = &client->dev; > > + data->indio_dev->dev_data = (void *)(data); > > + data->indio_dev->driver_module = THIS_MODULE; > > + data->indio_dev->modes = INDIO_DIRECT_MODE; > > + err = iio_device_register(data->indio_dev); > > + if (err) > > + goto exit_free2; > > + return 0; > > +exit_free2: > > + iio_free_device(data->indio_dev); > > +exit_free1: > > + kfree(data); > > +exit: > > + return err; > > +} > > + > > +static int hmc5843_remove(struct i2c_client *client) > > +{ > > + struct hmc5843_data *data = i2c_get_clientdata(client); > > + /* sleep mode to save power */ > > + hmc5843_configure(client, MODE_SLEEP); > > + iio_device_unregister(data->indio_dev); > > + kfree(i2c_get_clientdata(client)); > > + return 0; > > +} > > + > > +static int hmc5843_suspend(struct i2c_client *client, pm_message_t > mesg) > > +{ > > + hmc5843_configure(client, MODE_SLEEP); > > + return 0; > > +} > > + > > +static int hmc5843_resume(struct i2c_client *client) > > +{ > > + struct hmc5843_data *data = i2c_get_clientdata(client); > > + hmc5843_configure(client, data->operating_mode); > > + return 0; > > +} > > + > > +static const struct i2c_device_id hmc5843_id[] = { > > + { "hmc5843", 0 }, > > + { } > > +}; > > + > > +static struct i2c_driver hmc5843_driver = { > > + .driver = { > > + .name = "hmc5843", > > + }, > > + .id_table = hmc5843_id, > > + .probe = hmc5843_probe, > > + .remove = hmc5843_remove, > > + .detect = hmc5843_detect, > > + .address_list = normal_i2c, > > + .suspend = hmc5843_suspend, > > + .resume = hmc5843_resume, > > +}; > > + > > +static int __init hmc5843_init(void) > > +{ > > + return i2c_add_driver(&hmc5843_driver); > > +} > > + > > +static void __exit hmc5843_exit(void) > > +{ > > + i2c_del_driver(&hmc5843_driver); > > +} > > + > > +MODULE_AUTHOR("Shubhrajyoti Datta <shubhrajyoti@xxxxxx"); > > +MODULE_DESCRIPTION("HMC5843 driver"); > > +MODULE_LICENSE("GPL"); > > + > > +module_init(hmc5843_init); > > +module_exit(hmc5843_exit); > > -- > > 1.5.4.7 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > ��.n��������+%������w��{.n�����{��(��)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
