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690 lines
18 KiB
690 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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* Acknowledgment: Jonathan Cameron <[email protected]> for valuable inputs. |
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* Support for HMC5883 and HMC5883L by Peter Meerwald <[email protected]>. |
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* Split to multiple files by Josef Gajdusek <[email protected]> - 2014 |
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*/ |
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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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|
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#include "hmc5843.h" |
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|
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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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|
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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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|
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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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/* |
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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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|
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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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/* |
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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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/* |
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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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|
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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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|
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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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|
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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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|
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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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|
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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_mount_matrix * |
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hmc5843_get_mount_matrix(const 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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return &data->orientation; |
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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", IIO_SHARED_BY_TYPE, &hmc5843_meas_conf_enum), |
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IIO_ENUM_AVAILABLE("meas_conf", &hmc5843_meas_conf_enum), |
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IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix), |
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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", IIO_SHARED_BY_TYPE, &hmc5983_meas_conf_enum), |
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IIO_ENUM_AVAILABLE("meas_conf", &hmc5983_meas_conf_enum), |
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IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix), |
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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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|
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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->scan.chans, sizeof(data->scan.chans)); |
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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->scan, |
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iio_get_time_ns(indio_dev)); |
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|
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done: |
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iio_trigger_notify_done(indio_dev->trig); |
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|
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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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|
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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, \ |
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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 = hmc5983_ext_info, \ |
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} |
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|
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static const struct iio_chan_spec hmc5843_channels[] = { |
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HMC5843_CHANNEL(X, 0), |
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HMC5843_CHANNEL(Y, 1), |
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HMC5843_CHANNEL(Z, 2), |
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IIO_CHAN_SOFT_TIMESTAMP(3), |
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}; |
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|
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/* Beware: Y and Z are exchanged on HMC5883 and 5983 */ |
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static const struct iio_chan_spec hmc5883_channels[] = { |
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HMC5843_CHANNEL(X, 0), |
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HMC5843_CHANNEL(Z, 1), |
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HMC5843_CHANNEL(Y, 2), |
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IIO_CHAN_SOFT_TIMESTAMP(3), |
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}; |
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|
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static const struct iio_chan_spec hmc5983_channels[] = { |
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HMC5983_CHANNEL(X, 0), |
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HMC5983_CHANNEL(Z, 1), |
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HMC5983_CHANNEL(Y, 2), |
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IIO_CHAN_SOFT_TIMESTAMP(3), |
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}; |
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|
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static struct attribute *hmc5843_attributes[] = { |
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&iio_dev_attr_scale_available.dev_attr.attr, |
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&iio_dev_attr_sampling_frequency_available.dev_attr.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group hmc5843_group = { |
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.attrs = hmc5843_attributes, |
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}; |
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|
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static const struct hmc5843_chip_info hmc5843_chip_info_tbl[] = { |
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[HMC5843_ID] = { |
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.channels = hmc5843_channels, |
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.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); |
|
|
|
ret = iio_read_mount_matrix(dev, &data->orientation); |
|
if (ret) |
|
return ret; |
|
|
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 core driver"); |
|
MODULE_LICENSE("GPL");
|
|
|