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The equivalent of both of these are now done via macro magic when the relevant register calls are made. The actual structure elements will shortly go away. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
686 lines
18 KiB
C
686 lines
18 KiB
C
/*
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* Device driver for the the HMC5843 multi-chip module designed
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* for low field magnetic sensing.
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*
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* Copyright (C) 2010 Texas Instruments
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*
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* Author: Shubhrajyoti Datta <shubhrajyoti@ti.com>
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* Acknowledgment: Jonathan Cameron <jic23@kernel.org> for valuable inputs.
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* Support for HMC5883 and HMC5883L by Peter Meerwald <pmeerw@pmeerw.net>.
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* Split to multiple files by Josef Gajdusek <atx@atx.name> - 2014
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/delay.h>
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#include "hmc5843.h"
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/*
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* Range gain settings in (+-)Ga
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* Beware: HMC5843 and HMC5883 have different recommended sensor field
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* ranges; default corresponds to +-1.0 Ga and +-1.3 Ga, respectively
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*/
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#define HMC5843_RANGE_GAIN_OFFSET 0x05
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#define HMC5843_RANGE_GAIN_DEFAULT 0x01
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#define HMC5843_RANGE_GAIN_MASK 0xe0
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/* Device status */
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#define HMC5843_DATA_READY 0x01
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#define HMC5843_DATA_OUTPUT_LOCK 0x02
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/* Mode register configuration */
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#define HMC5843_MODE_CONVERSION_CONTINUOUS 0x00
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#define HMC5843_MODE_CONVERSION_SINGLE 0x01
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#define HMC5843_MODE_IDLE 0x02
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#define HMC5843_MODE_SLEEP 0x03
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#define HMC5843_MODE_MASK 0x03
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/*
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* HMC5843: Minimum data output rate
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* HMC5883: Typical data output rate
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*/
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#define HMC5843_RATE_OFFSET 0x02
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#define HMC5843_RATE_DEFAULT 0x04
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#define HMC5843_RATE_MASK 0x1c
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/* Device measurement configuration */
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#define HMC5843_MEAS_CONF_NORMAL 0x00
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#define HMC5843_MEAS_CONF_POSITIVE_BIAS 0x01
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#define HMC5843_MEAS_CONF_NEGATIVE_BIAS 0x02
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#define HMC5843_MEAS_CONF_MASK 0x03
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/*
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* API for setting the measurement configuration to
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* Normal, Positive bias and Negative bias
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*
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* From the datasheet:
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* 0 - Normal measurement configuration (default): In normal measurement
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* configuration the device follows normal measurement flow. Pins BP
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* and BN are left floating and high impedance.
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*
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* 1 - Positive bias configuration: In positive bias configuration, a
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* positive current is forced across the resistive load on pins BP
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* and BN.
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*
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* 2 - Negative bias configuration. In negative bias configuration, a
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* negative current is forced across the resistive load on pins BP
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* and BN.
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*
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* 3 - Only available on HMC5983. Magnetic sensor is disabled.
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* Temperature sensor is enabled.
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*/
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static const char *const hmc5843_meas_conf_modes[] = {"normal", "positivebias",
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"negativebias"};
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static const char *const hmc5983_meas_conf_modes[] = {"normal", "positivebias",
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"negativebias",
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"disabled"};
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/* Scaling factors: 10000000/Gain */
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static const int hmc5843_regval_to_nanoscale[] = {
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6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714
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};
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static const int hmc5883_regval_to_nanoscale[] = {
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7812, 9766, 13021, 16287, 24096, 27701, 32573, 45662
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};
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static const int hmc5883l_regval_to_nanoscale[] = {
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7299, 9174, 12195, 15152, 22727, 25641, 30303, 43478
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};
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/*
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* From the datasheet:
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* Value | HMC5843 | HMC5883/HMC5883L
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* | Data output rate (Hz) | Data output rate (Hz)
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* 0 | 0.5 | 0.75
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* 1 | 1 | 1.5
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* 2 | 2 | 3
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* 3 | 5 | 7.5
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* 4 | 10 (default) | 15
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* 5 | 20 | 30
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* 6 | 50 | 75
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* 7 | Not used | Not used
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*/
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static const int hmc5843_regval_to_samp_freq[][2] = {
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{0, 500000}, {1, 0}, {2, 0}, {5, 0}, {10, 0}, {20, 0}, {50, 0}
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};
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static const int hmc5883_regval_to_samp_freq[][2] = {
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{0, 750000}, {1, 500000}, {3, 0}, {7, 500000}, {15, 0}, {30, 0},
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{75, 0}
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};
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static const int hmc5983_regval_to_samp_freq[][2] = {
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{0, 750000}, {1, 500000}, {3, 0}, {7, 500000}, {15, 0}, {30, 0},
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{75, 0}, {220, 0}
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};
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/* Describe chip variants */
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struct hmc5843_chip_info {
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const struct iio_chan_spec *channels;
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const int (*regval_to_samp_freq)[2];
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const int n_regval_to_samp_freq;
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const int *regval_to_nanoscale;
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const int n_regval_to_nanoscale;
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};
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/* The lower two bits contain the current conversion mode */
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static s32 hmc5843_set_mode(struct hmc5843_data *data, u8 operating_mode)
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{
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int ret;
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mutex_lock(&data->lock);
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ret = regmap_update_bits(data->regmap, HMC5843_MODE_REG,
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HMC5843_MODE_MASK, operating_mode);
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mutex_unlock(&data->lock);
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return ret;
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}
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static int hmc5843_wait_measurement(struct hmc5843_data *data)
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{
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int tries = 150;
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unsigned int val;
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int ret;
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while (tries-- > 0) {
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ret = regmap_read(data->regmap, HMC5843_STATUS_REG, &val);
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if (ret < 0)
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return ret;
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if (val & HMC5843_DATA_READY)
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break;
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msleep(20);
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}
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if (tries < 0) {
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dev_err(data->dev, "data not ready\n");
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return -EIO;
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}
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return 0;
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}
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/* Return the measurement value from the specified channel */
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static int hmc5843_read_measurement(struct hmc5843_data *data,
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int idx, int *val)
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{
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__be16 values[3];
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int ret;
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mutex_lock(&data->lock);
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ret = hmc5843_wait_measurement(data);
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if (ret < 0) {
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mutex_unlock(&data->lock);
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return ret;
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}
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ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS,
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values, sizeof(values));
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mutex_unlock(&data->lock);
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if (ret < 0)
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return ret;
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*val = sign_extend32(be16_to_cpu(values[idx]), 15);
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return IIO_VAL_INT;
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}
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static int hmc5843_set_meas_conf(struct hmc5843_data *data, u8 meas_conf)
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{
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int ret;
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mutex_lock(&data->lock);
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ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
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HMC5843_MEAS_CONF_MASK, meas_conf);
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mutex_unlock(&data->lock);
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return ret;
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}
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static
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int hmc5843_show_measurement_configuration(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan)
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{
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struct hmc5843_data *data = iio_priv(indio_dev);
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unsigned int val;
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int ret;
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ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &val);
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if (ret)
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return ret;
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return val & HMC5843_MEAS_CONF_MASK;
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}
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static
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int hmc5843_set_measurement_configuration(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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unsigned int meas_conf)
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{
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struct hmc5843_data *data = iio_priv(indio_dev);
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return hmc5843_set_meas_conf(data, meas_conf);
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}
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static const struct iio_enum hmc5843_meas_conf_enum = {
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.items = hmc5843_meas_conf_modes,
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.num_items = ARRAY_SIZE(hmc5843_meas_conf_modes),
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.get = hmc5843_show_measurement_configuration,
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.set = hmc5843_set_measurement_configuration,
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};
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static const struct iio_chan_spec_ext_info hmc5843_ext_info[] = {
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IIO_ENUM("meas_conf", true, &hmc5843_meas_conf_enum),
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IIO_ENUM_AVAILABLE("meas_conf", &hmc5843_meas_conf_enum),
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{ },
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};
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static const struct iio_enum hmc5983_meas_conf_enum = {
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.items = hmc5983_meas_conf_modes,
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.num_items = ARRAY_SIZE(hmc5983_meas_conf_modes),
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.get = hmc5843_show_measurement_configuration,
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.set = hmc5843_set_measurement_configuration,
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};
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static const struct iio_chan_spec_ext_info hmc5983_ext_info[] = {
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IIO_ENUM("meas_conf", true, &hmc5983_meas_conf_enum),
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IIO_ENUM_AVAILABLE("meas_conf", &hmc5983_meas_conf_enum),
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{ },
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};
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static
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ssize_t hmc5843_show_samp_freq_avail(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
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size_t len = 0;
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int i;
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for (i = 0; i < data->variant->n_regval_to_samp_freq; i++)
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len += scnprintf(buf + len, PAGE_SIZE - len,
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"%d.%d ", data->variant->regval_to_samp_freq[i][0],
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data->variant->regval_to_samp_freq[i][1]);
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/* replace trailing space by newline */
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buf[len - 1] = '\n';
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return len;
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}
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static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(hmc5843_show_samp_freq_avail);
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static int hmc5843_set_samp_freq(struct hmc5843_data *data, u8 rate)
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{
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int ret;
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mutex_lock(&data->lock);
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ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
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HMC5843_RATE_MASK,
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rate << HMC5843_RATE_OFFSET);
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mutex_unlock(&data->lock);
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return ret;
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}
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static int hmc5843_get_samp_freq_index(struct hmc5843_data *data,
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int val, int val2)
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{
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int i;
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for (i = 0; i < data->variant->n_regval_to_samp_freq; i++)
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if (val == data->variant->regval_to_samp_freq[i][0] &&
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val2 == data->variant->regval_to_samp_freq[i][1])
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return i;
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return -EINVAL;
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}
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static int hmc5843_set_range_gain(struct hmc5843_data *data, u8 range)
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{
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int ret;
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mutex_lock(&data->lock);
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ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_B,
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HMC5843_RANGE_GAIN_MASK,
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range << HMC5843_RANGE_GAIN_OFFSET);
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mutex_unlock(&data->lock);
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return ret;
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}
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static ssize_t hmc5843_show_scale_avail(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
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size_t len = 0;
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int i;
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for (i = 0; i < data->variant->n_regval_to_nanoscale; i++)
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len += scnprintf(buf + len, PAGE_SIZE - len,
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"0.%09d ", data->variant->regval_to_nanoscale[i]);
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/* replace trailing space by newline */
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buf[len - 1] = '\n';
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return len;
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}
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static IIO_DEVICE_ATTR(scale_available, S_IRUGO,
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hmc5843_show_scale_avail, NULL, 0);
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static int hmc5843_get_scale_index(struct hmc5843_data *data, int val, int val2)
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{
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int i;
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if (val)
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return -EINVAL;
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for (i = 0; i < data->variant->n_regval_to_nanoscale; i++)
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if (val2 == data->variant->regval_to_nanoscale[i])
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return i;
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return -EINVAL;
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}
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static int hmc5843_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long mask)
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{
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struct hmc5843_data *data = iio_priv(indio_dev);
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unsigned int rval;
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int ret;
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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return hmc5843_read_measurement(data, chan->scan_index, val);
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case IIO_CHAN_INFO_SCALE:
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ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_B, &rval);
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if (ret < 0)
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return ret;
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rval >>= HMC5843_RANGE_GAIN_OFFSET;
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*val = 0;
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*val2 = data->variant->regval_to_nanoscale[rval];
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return IIO_VAL_INT_PLUS_NANO;
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case IIO_CHAN_INFO_SAMP_FREQ:
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ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &rval);
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if (ret < 0)
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return ret;
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rval >>= HMC5843_RATE_OFFSET;
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*val = data->variant->regval_to_samp_freq[rval][0];
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*val2 = data->variant->regval_to_samp_freq[rval][1];
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return IIO_VAL_INT_PLUS_MICRO;
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}
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return -EINVAL;
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}
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static int hmc5843_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int val, int val2, long mask)
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{
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struct hmc5843_data *data = iio_priv(indio_dev);
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int rate, range;
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switch (mask) {
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case IIO_CHAN_INFO_SAMP_FREQ:
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rate = hmc5843_get_samp_freq_index(data, val, val2);
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if (rate < 0)
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return -EINVAL;
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return hmc5843_set_samp_freq(data, rate);
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case IIO_CHAN_INFO_SCALE:
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range = hmc5843_get_scale_index(data, val, val2);
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if (range < 0)
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return -EINVAL;
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return hmc5843_set_range_gain(data, range);
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default:
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return -EINVAL;
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}
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}
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static int hmc5843_write_raw_get_fmt(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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long mask)
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{
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switch (mask) {
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case IIO_CHAN_INFO_SAMP_FREQ:
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return IIO_VAL_INT_PLUS_MICRO;
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case IIO_CHAN_INFO_SCALE:
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return IIO_VAL_INT_PLUS_NANO;
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default:
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return -EINVAL;
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}
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}
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static irqreturn_t hmc5843_trigger_handler(int irq, void *p)
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{
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struct iio_poll_func *pf = p;
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struct iio_dev *indio_dev = pf->indio_dev;
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struct hmc5843_data *data = iio_priv(indio_dev);
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int ret;
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mutex_lock(&data->lock);
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ret = hmc5843_wait_measurement(data);
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if (ret < 0) {
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mutex_unlock(&data->lock);
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goto done;
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}
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ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS,
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data->buffer, 3 * sizeof(__be16));
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mutex_unlock(&data->lock);
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if (ret < 0)
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goto done;
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iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
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iio_get_time_ns(indio_dev));
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done:
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iio_trigger_notify_done(indio_dev->trig);
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return IRQ_HANDLED;
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}
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#define HMC5843_CHANNEL(axis, idx) \
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{ \
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.type = IIO_MAGN, \
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.modified = 1, \
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.channel2 = IIO_MOD_##axis, \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
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BIT(IIO_CHAN_INFO_SAMP_FREQ), \
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.scan_index = idx, \
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.scan_type = { \
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.sign = 's', \
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.realbits = 16, \
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.storagebits = 16, \
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.endianness = IIO_BE, \
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}, \
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.ext_info = hmc5843_ext_info, \
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}
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#define HMC5983_CHANNEL(axis, idx) \
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{ \
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.type = IIO_MAGN, \
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.modified = 1, \
|
|
.channel2 = IIO_MOD_##axis, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
.scan_index = idx, \
|
|
.scan_type = { \
|
|
.sign = 's', \
|
|
.realbits = 16, \
|
|
.storagebits = 16, \
|
|
.endianness = IIO_BE, \
|
|
}, \
|
|
.ext_info = hmc5983_ext_info, \
|
|
}
|
|
|
|
static const struct iio_chan_spec hmc5843_channels[] = {
|
|
HMC5843_CHANNEL(X, 0),
|
|
HMC5843_CHANNEL(Y, 1),
|
|
HMC5843_CHANNEL(Z, 2),
|
|
IIO_CHAN_SOFT_TIMESTAMP(3),
|
|
};
|
|
|
|
/* Beware: Y and Z are exchanged on HMC5883 and 5983 */
|
|
static const struct iio_chan_spec hmc5883_channels[] = {
|
|
HMC5843_CHANNEL(X, 0),
|
|
HMC5843_CHANNEL(Z, 1),
|
|
HMC5843_CHANNEL(Y, 2),
|
|
IIO_CHAN_SOFT_TIMESTAMP(3),
|
|
};
|
|
|
|
static const struct iio_chan_spec hmc5983_channels[] = {
|
|
HMC5983_CHANNEL(X, 0),
|
|
HMC5983_CHANNEL(Z, 1),
|
|
HMC5983_CHANNEL(Y, 2),
|
|
IIO_CHAN_SOFT_TIMESTAMP(3),
|
|
};
|
|
|
|
static struct attribute *hmc5843_attributes[] = {
|
|
&iio_dev_attr_scale_available.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,
|
|
.regval_to_samp_freq = hmc5843_regval_to_samp_freq,
|
|
.n_regval_to_samp_freq =
|
|
ARRAY_SIZE(hmc5843_regval_to_samp_freq),
|
|
.regval_to_nanoscale = hmc5843_regval_to_nanoscale,
|
|
.n_regval_to_nanoscale =
|
|
ARRAY_SIZE(hmc5843_regval_to_nanoscale),
|
|
},
|
|
[HMC5883_ID] = {
|
|
.channels = hmc5883_channels,
|
|
.regval_to_samp_freq = hmc5883_regval_to_samp_freq,
|
|
.n_regval_to_samp_freq =
|
|
ARRAY_SIZE(hmc5883_regval_to_samp_freq),
|
|
.regval_to_nanoscale = hmc5883_regval_to_nanoscale,
|
|
.n_regval_to_nanoscale =
|
|
ARRAY_SIZE(hmc5883_regval_to_nanoscale),
|
|
},
|
|
[HMC5883L_ID] = {
|
|
.channels = hmc5883_channels,
|
|
.regval_to_samp_freq = hmc5883_regval_to_samp_freq,
|
|
.n_regval_to_samp_freq =
|
|
ARRAY_SIZE(hmc5883_regval_to_samp_freq),
|
|
.regval_to_nanoscale = hmc5883l_regval_to_nanoscale,
|
|
.n_regval_to_nanoscale =
|
|
ARRAY_SIZE(hmc5883l_regval_to_nanoscale),
|
|
},
|
|
[HMC5983_ID] = {
|
|
.channels = hmc5983_channels,
|
|
.regval_to_samp_freq = hmc5983_regval_to_samp_freq,
|
|
.n_regval_to_samp_freq =
|
|
ARRAY_SIZE(hmc5983_regval_to_samp_freq),
|
|
.regval_to_nanoscale = hmc5883l_regval_to_nanoscale,
|
|
.n_regval_to_nanoscale =
|
|
ARRAY_SIZE(hmc5883l_regval_to_nanoscale),
|
|
}
|
|
};
|
|
|
|
static int hmc5843_init(struct hmc5843_data *data)
|
|
{
|
|
int ret;
|
|
u8 id[3];
|
|
|
|
ret = regmap_bulk_read(data->regmap, HMC5843_ID_REG,
|
|
id, ARRAY_SIZE(id));
|
|
if (ret < 0)
|
|
return ret;
|
|
if (id[0] != 'H' || id[1] != '4' || id[2] != '3') {
|
|
dev_err(data->dev, "no HMC5843/5883/5883L/5983 sensor\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = hmc5843_set_meas_conf(data, HMC5843_MEAS_CONF_NORMAL);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = hmc5843_set_samp_freq(data, HMC5843_RATE_DEFAULT);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = hmc5843_set_range_gain(data, HMC5843_RANGE_GAIN_DEFAULT);
|
|
if (ret < 0)
|
|
return ret;
|
|
return hmc5843_set_mode(data, HMC5843_MODE_CONVERSION_CONTINUOUS);
|
|
}
|
|
|
|
static const struct iio_info hmc5843_info = {
|
|
.attrs = &hmc5843_group,
|
|
.read_raw = &hmc5843_read_raw,
|
|
.write_raw = &hmc5843_write_raw,
|
|
.write_raw_get_fmt = &hmc5843_write_raw_get_fmt,
|
|
};
|
|
|
|
static const unsigned long hmc5843_scan_masks[] = {0x7, 0};
|
|
|
|
int hmc5843_common_suspend(struct device *dev)
|
|
{
|
|
return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
|
|
HMC5843_MODE_SLEEP);
|
|
}
|
|
EXPORT_SYMBOL(hmc5843_common_suspend);
|
|
|
|
int hmc5843_common_resume(struct device *dev)
|
|
{
|
|
return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)),
|
|
HMC5843_MODE_CONVERSION_CONTINUOUS);
|
|
}
|
|
EXPORT_SYMBOL(hmc5843_common_resume);
|
|
|
|
int hmc5843_common_probe(struct device *dev, struct regmap *regmap,
|
|
enum hmc5843_ids id, const char *name)
|
|
{
|
|
struct hmc5843_data *data;
|
|
struct iio_dev *indio_dev;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
dev_set_drvdata(dev, indio_dev);
|
|
|
|
/* default settings at probe */
|
|
data = iio_priv(indio_dev);
|
|
data->dev = dev;
|
|
data->regmap = regmap;
|
|
data->variant = &hmc5843_chip_info_tbl[id];
|
|
mutex_init(&data->lock);
|
|
|
|
indio_dev->dev.parent = dev;
|
|
indio_dev->name = name;
|
|
indio_dev->info = &hmc5843_info;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
indio_dev->channels = data->variant->channels;
|
|
indio_dev->num_channels = 4;
|
|
indio_dev->available_scan_masks = hmc5843_scan_masks;
|
|
|
|
ret = hmc5843_init(data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = iio_triggered_buffer_setup(indio_dev, NULL,
|
|
hmc5843_trigger_handler, NULL);
|
|
if (ret < 0)
|
|
goto buffer_setup_err;
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret < 0)
|
|
goto buffer_cleanup;
|
|
|
|
return 0;
|
|
|
|
buffer_cleanup:
|
|
iio_triggered_buffer_cleanup(indio_dev);
|
|
buffer_setup_err:
|
|
hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(hmc5843_common_probe);
|
|
|
|
int hmc5843_common_remove(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
iio_triggered_buffer_cleanup(indio_dev);
|
|
|
|
/* sleep mode to save power */
|
|
hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(hmc5843_common_remove);
|
|
|
|
MODULE_AUTHOR("Shubhrajyoti Datta <shubhrajyoti@ti.com>");
|
|
MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 core driver");
|
|
MODULE_LICENSE("GPL");
|