Cristina Opriceana | 6cf23df | 2015-03-22 20:43:16 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Device driver for the the HMC5843 multi-chip module designed |
| 3 | * for low field magnetic sensing. |
| 4 | * |
| 5 | * Copyright (C) 2010 Texas Instruments |
| 6 | * |
| 7 | * Author: Shubhrajyoti Datta <shubhrajyoti@ti.com> |
| 8 | * Acknowledgment: Jonathan Cameron <jic23@kernel.org> for valuable inputs. |
| 9 | * Support for HMC5883 and HMC5883L by Peter Meerwald <pmeerw@pmeerw.net>. |
| 10 | * Split to multiple files by Josef Gajdusek <atx@atx.name> - 2014 |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
Cristina Opriceana | 6cf23df | 2015-03-22 20:43:16 +0200 | [diff] [blame] | 21 | */ |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 22 | |
| 23 | #include <linux/module.h> |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 24 | #include <linux/regmap.h> |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 25 | #include <linux/iio/iio.h> |
| 26 | #include <linux/iio/sysfs.h> |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 27 | #include <linux/iio/trigger_consumer.h> |
| 28 | #include <linux/iio/buffer.h> |
| 29 | #include <linux/iio/triggered_buffer.h> |
Peter Meerwald | 4dedf31 | 2013-07-27 16:31:00 +0100 | [diff] [blame] | 30 | #include <linux/delay.h> |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 31 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 32 | #include "hmc5843.h" |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 33 | |
| 34 | /* |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 35 | * Range gain settings in (+-)Ga |
| 36 | * Beware: HMC5843 and HMC5883 have different recommended sensor field |
| 37 | * ranges; default corresponds to +-1.0 Ga and +-1.3 Ga, respectively |
| 38 | */ |
| 39 | #define HMC5843_RANGE_GAIN_OFFSET 0x05 |
| 40 | #define HMC5843_RANGE_GAIN_DEFAULT 0x01 |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 41 | #define HMC5843_RANGE_GAIN_MASK 0xe0 |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 42 | |
Peter Meerwald | 9728fe3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 43 | /* Device status */ |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 44 | #define HMC5843_DATA_READY 0x01 |
| 45 | #define HMC5843_DATA_OUTPUT_LOCK 0x02 |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 46 | |
Peter Meerwald | 9728fe3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 47 | /* Mode register configuration */ |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 48 | #define HMC5843_MODE_CONVERSION_CONTINUOUS 0x00 |
| 49 | #define HMC5843_MODE_CONVERSION_SINGLE 0x01 |
| 50 | #define HMC5843_MODE_IDLE 0x02 |
| 51 | #define HMC5843_MODE_SLEEP 0x03 |
| 52 | #define HMC5843_MODE_MASK 0x03 |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 53 | |
| 54 | /* |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 55 | * HMC5843: Minimum data output rate |
| 56 | * HMC5883: Typical data output rate |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 57 | */ |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 58 | #define HMC5843_RATE_OFFSET 0x02 |
Peter Meerwald | 8e2e297 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 59 | #define HMC5843_RATE_DEFAULT 0x04 |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 60 | #define HMC5843_RATE_MASK 0x1c |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 61 | |
Peter Meerwald | 9728fe3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 62 | /* Device measurement configuration */ |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 63 | #define HMC5843_MEAS_CONF_NORMAL 0x00 |
| 64 | #define HMC5843_MEAS_CONF_POSITIVE_BIAS 0x01 |
| 65 | #define HMC5843_MEAS_CONF_NEGATIVE_BIAS 0x02 |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 66 | #define HMC5843_MEAS_CONF_MASK 0x03 |
| 67 | |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 68 | /* |
| 69 | * API for setting the measurement configuration to |
| 70 | * Normal, Positive bias and Negative bias |
| 71 | * |
| 72 | * From the datasheet: |
| 73 | * 0 - Normal measurement configuration (default): In normal measurement |
| 74 | * configuration the device follows normal measurement flow. Pins BP |
| 75 | * and BN are left floating and high impedance. |
| 76 | * |
| 77 | * 1 - Positive bias configuration: In positive bias configuration, a |
| 78 | * positive current is forced across the resistive load on pins BP |
| 79 | * and BN. |
| 80 | * |
| 81 | * 2 - Negative bias configuration. In negative bias configuration, a |
| 82 | * negative current is forced across the resistive load on pins BP |
| 83 | * and BN. |
| 84 | * |
| 85 | * 3 - Only available on HMC5983. Magnetic sensor is disabled. |
| 86 | * Temperature sensor is enabled. |
| 87 | */ |
| 88 | |
| 89 | static const char *const hmc5843_meas_conf_modes[] = {"normal", "positivebias", |
| 90 | "negativebias"}; |
| 91 | |
| 92 | static const char *const hmc5983_meas_conf_modes[] = {"normal", "positivebias", |
| 93 | "negativebias", |
| 94 | "disabled"}; |
Peter Meerwald | 9728fe3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 95 | /* Scaling factors: 10000000/Gain */ |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 96 | static const int hmc5843_regval_to_nanoscale[] = { |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 97 | 6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714 |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 98 | }; |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 99 | |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 100 | static const int hmc5883_regval_to_nanoscale[] = { |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 101 | 7812, 9766, 13021, 16287, 24096, 27701, 32573, 45662 |
| 102 | }; |
| 103 | |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 104 | static const int hmc5883l_regval_to_nanoscale[] = { |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 105 | 7299, 9174, 12195, 15152, 22727, 25641, 30303, 43478 |
| 106 | }; |
| 107 | |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 108 | /* |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 109 | * From the datasheet: |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 110 | * Value | HMC5843 | HMC5883/HMC5883L |
| 111 | * | Data output rate (Hz) | Data output rate (Hz) |
| 112 | * 0 | 0.5 | 0.75 |
| 113 | * 1 | 1 | 1.5 |
| 114 | * 2 | 2 | 3 |
| 115 | * 3 | 5 | 7.5 |
| 116 | * 4 | 10 (default) | 15 |
| 117 | * 5 | 20 | 30 |
| 118 | * 6 | 50 | 75 |
| 119 | * 7 | Not used | Not used |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 120 | */ |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 121 | static const int hmc5843_regval_to_samp_freq[][2] = { |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 122 | {0, 500000}, {1, 0}, {2, 0}, {5, 0}, {10, 0}, {20, 0}, {50, 0} |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 123 | }; |
| 124 | |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 125 | static const int hmc5883_regval_to_samp_freq[][2] = { |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 126 | {0, 750000}, {1, 500000}, {3, 0}, {7, 500000}, {15, 0}, {30, 0}, |
| 127 | {75, 0} |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 128 | }; |
| 129 | |
Josef Gajdusek | 5a059bd | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 130 | static const int hmc5983_regval_to_samp_freq[][2] = { |
| 131 | {0, 750000}, {1, 500000}, {3, 0}, {7, 500000}, {15, 0}, {30, 0}, |
| 132 | {75, 0}, {220, 0} |
| 133 | }; |
| 134 | |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 135 | /* Describe chip variants */ |
| 136 | struct hmc5843_chip_info { |
| 137 | const struct iio_chan_spec *channels; |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 138 | const int (*regval_to_samp_freq)[2]; |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 139 | const int n_regval_to_samp_freq; |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 140 | const int *regval_to_nanoscale; |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 141 | const int n_regval_to_nanoscale; |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 142 | }; |
| 143 | |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 144 | /* The lower two bits contain the current conversion mode */ |
Peter Meerwald | 6224875 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 145 | static s32 hmc5843_set_mode(struct hmc5843_data *data, u8 operating_mode) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 146 | { |
Peter Meerwald | 6224875 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 147 | int ret; |
| 148 | |
| 149 | mutex_lock(&data->lock); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 150 | ret = regmap_update_bits(data->regmap, HMC5843_MODE_REG, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 151 | HMC5843_MODE_MASK, operating_mode); |
Peter Meerwald | 6224875 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 152 | mutex_unlock(&data->lock); |
| 153 | |
| 154 | return ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 155 | } |
| 156 | |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 157 | static int hmc5843_wait_measurement(struct hmc5843_data *data) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 158 | { |
Peter Meerwald | 4dedf31 | 2013-07-27 16:31:00 +0100 | [diff] [blame] | 159 | int tries = 150; |
Teodora Baluta | 883fc26 | 2014-07-28 12:18:00 +0100 | [diff] [blame] | 160 | unsigned int val; |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 161 | int ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 162 | |
Peter Meerwald | 4dedf31 | 2013-07-27 16:31:00 +0100 | [diff] [blame] | 163 | while (tries-- > 0) { |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 164 | ret = regmap_read(data->regmap, HMC5843_STATUS_REG, &val); |
| 165 | if (ret < 0) |
| 166 | return ret; |
| 167 | if (val & HMC5843_DATA_READY) |
Peter Meerwald | 4dedf31 | 2013-07-27 16:31:00 +0100 | [diff] [blame] | 168 | break; |
| 169 | msleep(20); |
| 170 | } |
| 171 | |
| 172 | if (tries < 0) { |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 173 | dev_err(data->dev, "data not ready\n"); |
Peter Meerwald | 4dedf31 | 2013-07-27 16:31:00 +0100 | [diff] [blame] | 174 | return -EIO; |
| 175 | } |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 176 | |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /* Return the measurement value from the specified channel */ |
| 181 | static int hmc5843_read_measurement(struct hmc5843_data *data, |
| 182 | int idx, int *val) |
| 183 | { |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 184 | __be16 values[3]; |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 185 | int ret; |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 186 | |
| 187 | mutex_lock(&data->lock); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 188 | ret = hmc5843_wait_measurement(data); |
| 189 | if (ret < 0) { |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 190 | mutex_unlock(&data->lock); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 191 | return ret; |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 192 | } |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 193 | ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 194 | values, sizeof(values)); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 195 | mutex_unlock(&data->lock); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 196 | if (ret < 0) |
| 197 | return ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 198 | |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 199 | *val = sign_extend32(be16_to_cpu(values[idx]), 15); |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 200 | return IIO_VAL_INT; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 201 | } |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 202 | |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 203 | static int hmc5843_set_meas_conf(struct hmc5843_data *data, u8 meas_conf) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 204 | { |
Peter Meerwald | 4f1ca41 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 205 | int ret; |
| 206 | |
| 207 | mutex_lock(&data->lock); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 208 | ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 209 | HMC5843_MEAS_CONF_MASK, meas_conf); |
Peter Meerwald | 4f1ca41 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 210 | mutex_unlock(&data->lock); |
| 211 | |
| 212 | return ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 213 | } |
| 214 | |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 215 | static |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 216 | int hmc5843_show_measurement_configuration(struct iio_dev *indio_dev, |
| 217 | const struct iio_chan_spec *chan) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 218 | { |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 219 | struct hmc5843_data *data = iio_priv(indio_dev); |
Teodora Baluta | 883fc26 | 2014-07-28 12:18:00 +0100 | [diff] [blame] | 220 | unsigned int val; |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 221 | int ret; |
| 222 | |
| 223 | ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &val); |
| 224 | if (ret) |
| 225 | return ret; |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 226 | |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 227 | return val & HMC5843_MEAS_CONF_MASK; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 228 | } |
| 229 | |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 230 | static |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 231 | int hmc5843_set_measurement_configuration(struct iio_dev *indio_dev, |
| 232 | const struct iio_chan_spec *chan, |
| 233 | unsigned int meas_conf) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 234 | { |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 235 | struct hmc5843_data *data = iio_priv(indio_dev); |
Peter Meerwald | e278df1 | 2012-05-17 02:28:09 +0200 | [diff] [blame] | 236 | |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 237 | return hmc5843_set_meas_conf(data, meas_conf); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 238 | } |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 239 | |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 240 | static const struct iio_enum hmc5843_meas_conf_enum = { |
| 241 | .items = hmc5843_meas_conf_modes, |
| 242 | .num_items = ARRAY_SIZE(hmc5843_meas_conf_modes), |
| 243 | .get = hmc5843_show_measurement_configuration, |
| 244 | .set = hmc5843_set_measurement_configuration, |
| 245 | }; |
| 246 | |
| 247 | static const struct iio_chan_spec_ext_info hmc5843_ext_info[] = { |
| 248 | IIO_ENUM("meas_conf", true, &hmc5843_meas_conf_enum), |
| 249 | IIO_ENUM_AVAILABLE("meas_conf", &hmc5843_meas_conf_enum), |
| 250 | { }, |
| 251 | }; |
| 252 | |
| 253 | static const struct iio_enum hmc5983_meas_conf_enum = { |
| 254 | .items = hmc5983_meas_conf_modes, |
| 255 | .num_items = ARRAY_SIZE(hmc5983_meas_conf_modes), |
| 256 | .get = hmc5843_show_measurement_configuration, |
| 257 | .set = hmc5843_set_measurement_configuration, |
| 258 | }; |
| 259 | |
| 260 | static const struct iio_chan_spec_ext_info hmc5983_ext_info[] = { |
| 261 | IIO_ENUM("meas_conf", true, &hmc5983_meas_conf_enum), |
| 262 | IIO_ENUM_AVAILABLE("meas_conf", &hmc5983_meas_conf_enum), |
| 263 | { }, |
| 264 | }; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 265 | |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 266 | static |
| 267 | ssize_t hmc5843_show_samp_freq_avail(struct device *dev, |
| 268 | struct device_attribute *attr, char *buf) |
Peter Meerwald | dd28e48 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 269 | { |
Peter Meerwald | 9a3b2d5 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 270 | struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev)); |
Peter Meerwald | dd28e48 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 271 | size_t len = 0; |
| 272 | int i; |
| 273 | |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 274 | for (i = 0; i < data->variant->n_regval_to_samp_freq; i++) |
Peter Meerwald | dd28e48 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 275 | len += scnprintf(buf + len, PAGE_SIZE - len, |
Peter Meerwald | 9a3b2d5 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 276 | "%d.%d ", data->variant->regval_to_samp_freq[i][0], |
| 277 | data->variant->regval_to_samp_freq[i][1]); |
Peter Meerwald | dd28e48 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 278 | |
| 279 | /* replace trailing space by newline */ |
| 280 | buf[len - 1] = '\n'; |
| 281 | |
| 282 | return len; |
| 283 | } |
| 284 | |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 285 | static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(hmc5843_show_samp_freq_avail); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 286 | |
Peter Meerwald | ca4c617 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 287 | static int hmc5843_set_samp_freq(struct hmc5843_data *data, u8 rate) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 288 | { |
Peter Meerwald | ca4c617 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 289 | int ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 290 | |
Peter Meerwald | ca4c617 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 291 | mutex_lock(&data->lock); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 292 | ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 293 | HMC5843_RATE_MASK, |
| 294 | rate << HMC5843_RATE_OFFSET); |
Peter Meerwald | ca4c617 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 295 | mutex_unlock(&data->lock); |
| 296 | |
| 297 | return ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 298 | } |
| 299 | |
Peter Meerwald | 9a3b2d5 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 300 | static int hmc5843_get_samp_freq_index(struct hmc5843_data *data, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 301 | int val, int val2) |
Peter Meerwald | 13f6eb6 | 2012-05-17 02:28:08 +0200 | [diff] [blame] | 302 | { |
Peter Meerwald | 9a3b2d5 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 303 | int i; |
| 304 | |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 305 | for (i = 0; i < data->variant->n_regval_to_samp_freq; i++) |
Peter Meerwald | 9a3b2d5 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 306 | if (val == data->variant->regval_to_samp_freq[i][0] && |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 307 | val2 == data->variant->regval_to_samp_freq[i][1]) |
Peter Meerwald | 9a3b2d5 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 308 | return i; |
| 309 | |
| 310 | return -EINVAL; |
Peter Meerwald | 13f6eb6 | 2012-05-17 02:28:08 +0200 | [diff] [blame] | 311 | } |
| 312 | |
Peter Meerwald | f3f7551 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 313 | static int hmc5843_set_range_gain(struct hmc5843_data *data, u8 range) |
| 314 | { |
| 315 | int ret; |
| 316 | |
| 317 | mutex_lock(&data->lock); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 318 | ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_B, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 319 | HMC5843_RANGE_GAIN_MASK, |
| 320 | range << HMC5843_RANGE_GAIN_OFFSET); |
Peter Meerwald | f3f7551 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 321 | mutex_unlock(&data->lock); |
| 322 | |
| 323 | return ret; |
| 324 | } |
| 325 | |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 326 | static ssize_t hmc5843_show_scale_avail(struct device *dev, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 327 | struct device_attribute *attr, |
| 328 | char *buf) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 329 | { |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 330 | struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev)); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 331 | |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 332 | size_t len = 0; |
| 333 | int i; |
| 334 | |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 335 | for (i = 0; i < data->variant->n_regval_to_nanoscale; i++) |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 336 | len += scnprintf(buf + len, PAGE_SIZE - len, |
| 337 | "0.%09d ", data->variant->regval_to_nanoscale[i]); |
| 338 | |
| 339 | /* replace trailing space by newline */ |
| 340 | buf[len - 1] = '\n'; |
| 341 | |
| 342 | return len; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 343 | } |
| 344 | |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 345 | static IIO_DEVICE_ATTR(scale_available, S_IRUGO, |
| 346 | hmc5843_show_scale_avail, NULL, 0); |
| 347 | |
| 348 | static int hmc5843_get_scale_index(struct hmc5843_data *data, int val, int val2) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 349 | { |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 350 | int i; |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 351 | |
Cristina Moraru | cd857a1 | 2015-10-20 22:55:47 +0300 | [diff] [blame] | 352 | if (val) |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 353 | return -EINVAL; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 354 | |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 355 | for (i = 0; i < data->variant->n_regval_to_nanoscale; i++) |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 356 | if (val2 == data->variant->regval_to_nanoscale[i]) |
| 357 | return i; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 358 | |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 359 | return -EINVAL; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 360 | } |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 361 | |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 362 | static int hmc5843_read_raw(struct iio_dev *indio_dev, |
| 363 | struct iio_chan_spec const *chan, |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 364 | int *val, int *val2, long mask) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 365 | { |
Jonathan Cameron | 88fa4de | 2011-06-27 13:07:56 +0100 | [diff] [blame] | 366 | struct hmc5843_data *data = iio_priv(indio_dev); |
Teodora Baluta | 883fc26 | 2014-07-28 12:18:00 +0100 | [diff] [blame] | 367 | unsigned int rval; |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 368 | int ret; |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 369 | |
| 370 | switch (mask) { |
Jonathan Cameron | 4d9948b | 2012-04-15 17:41:23 +0100 | [diff] [blame] | 371 | case IIO_CHAN_INFO_RAW: |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 372 | return hmc5843_read_measurement(data, chan->scan_index, val); |
Jonathan Cameron | c8a9f80 | 2011-10-26 17:41:36 +0100 | [diff] [blame] | 373 | case IIO_CHAN_INFO_SCALE: |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 374 | ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_B, &rval); |
| 375 | if (ret < 0) |
| 376 | return ret; |
| 377 | rval >>= HMC5843_RANGE_GAIN_OFFSET; |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 378 | *val = 0; |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 379 | *val2 = data->variant->regval_to_nanoscale[rval]; |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 380 | return IIO_VAL_INT_PLUS_NANO; |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 381 | case IIO_CHAN_INFO_SAMP_FREQ: |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 382 | ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &rval); |
| 383 | if (ret < 0) |
| 384 | return ret; |
| 385 | rval >>= HMC5843_RATE_OFFSET; |
| 386 | *val = data->variant->regval_to_samp_freq[rval][0]; |
| 387 | *val2 = data->variant->regval_to_samp_freq[rval][1]; |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 388 | return IIO_VAL_INT_PLUS_MICRO; |
Peter Senna Tschudin | 73327b4 | 2012-09-28 10:57:00 +0100 | [diff] [blame] | 389 | } |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 390 | return -EINVAL; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 391 | } |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 392 | |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 393 | static int hmc5843_write_raw(struct iio_dev *indio_dev, |
| 394 | struct iio_chan_spec const *chan, |
| 395 | int val, int val2, long mask) |
| 396 | { |
| 397 | struct hmc5843_data *data = iio_priv(indio_dev); |
Peter Meerwald | f3f7551 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 398 | int rate, range; |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 399 | |
| 400 | switch (mask) { |
| 401 | case IIO_CHAN_INFO_SAMP_FREQ: |
Peter Meerwald | 9a3b2d5 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 402 | rate = hmc5843_get_samp_freq_index(data, val, val2); |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 403 | if (rate < 0) |
| 404 | return -EINVAL; |
| 405 | |
Peter Meerwald | ca4c617 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 406 | return hmc5843_set_samp_freq(data, rate); |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 407 | case IIO_CHAN_INFO_SCALE: |
| 408 | range = hmc5843_get_scale_index(data, val, val2); |
| 409 | if (range < 0) |
| 410 | return -EINVAL; |
| 411 | |
Peter Meerwald | f3f7551 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 412 | return hmc5843_set_range_gain(data, range); |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 413 | default: |
| 414 | return -EINVAL; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | static int hmc5843_write_raw_get_fmt(struct iio_dev *indio_dev, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 419 | struct iio_chan_spec const *chan, |
| 420 | long mask) |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 421 | { |
| 422 | switch (mask) { |
| 423 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 424 | return IIO_VAL_INT_PLUS_MICRO; |
| 425 | case IIO_CHAN_INFO_SCALE: |
| 426 | return IIO_VAL_INT_PLUS_NANO; |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 427 | default: |
| 428 | return -EINVAL; |
| 429 | } |
| 430 | } |
| 431 | |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 432 | static irqreturn_t hmc5843_trigger_handler(int irq, void *p) |
| 433 | { |
| 434 | struct iio_poll_func *pf = p; |
| 435 | struct iio_dev *indio_dev = pf->indio_dev; |
| 436 | struct hmc5843_data *data = iio_priv(indio_dev); |
| 437 | int ret; |
| 438 | |
| 439 | mutex_lock(&data->lock); |
| 440 | ret = hmc5843_wait_measurement(data); |
| 441 | if (ret < 0) { |
| 442 | mutex_unlock(&data->lock); |
| 443 | goto done; |
| 444 | } |
| 445 | |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 446 | ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 447 | data->buffer, 3 * sizeof(__be16)); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 448 | |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 449 | mutex_unlock(&data->lock); |
| 450 | if (ret < 0) |
| 451 | goto done; |
| 452 | |
| 453 | iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, |
Gregor Boirie | bc2b7da | 2016-03-09 19:05:49 +0100 | [diff] [blame] | 454 | iio_get_time_ns(indio_dev)); |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 455 | |
| 456 | done: |
| 457 | iio_trigger_notify_done(indio_dev->trig); |
| 458 | |
| 459 | return IRQ_HANDLED; |
| 460 | } |
| 461 | |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 462 | #define HMC5843_CHANNEL(axis, idx) \ |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 463 | { \ |
| 464 | .type = IIO_MAGN, \ |
| 465 | .modified = 1, \ |
| 466 | .channel2 = IIO_MOD_##axis, \ |
Jonathan Cameron | b370097 | 2013-02-27 19:40:58 +0000 | [diff] [blame] | 467 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 468 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ |
| 469 | BIT(IIO_CHAN_INFO_SAMP_FREQ), \ |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 470 | .scan_index = idx, \ |
Jonathan Cameron | c5fe7a41 | 2013-12-11 18:45:00 +0000 | [diff] [blame] | 471 | .scan_type = { \ |
| 472 | .sign = 's', \ |
| 473 | .realbits = 16, \ |
| 474 | .storagebits = 16, \ |
| 475 | .endianness = IIO_BE, \ |
| 476 | }, \ |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 477 | .ext_info = hmc5843_ext_info, \ |
| 478 | } |
| 479 | |
| 480 | #define HMC5983_CHANNEL(axis, idx) \ |
| 481 | { \ |
| 482 | .type = IIO_MAGN, \ |
| 483 | .modified = 1, \ |
| 484 | .channel2 = IIO_MOD_##axis, \ |
| 485 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
| 486 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ |
| 487 | BIT(IIO_CHAN_INFO_SAMP_FREQ), \ |
| 488 | .scan_index = idx, \ |
| 489 | .scan_type = { \ |
| 490 | .sign = 's', \ |
| 491 | .realbits = 16, \ |
| 492 | .storagebits = 16, \ |
| 493 | .endianness = IIO_BE, \ |
| 494 | }, \ |
| 495 | .ext_info = hmc5983_ext_info, \ |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | static const struct iio_chan_spec hmc5843_channels[] = { |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 499 | HMC5843_CHANNEL(X, 0), |
| 500 | HMC5843_CHANNEL(Y, 1), |
| 501 | HMC5843_CHANNEL(Z, 2), |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 502 | IIO_CHAN_SOFT_TIMESTAMP(3), |
Jonathan Cameron | 494c6b1 | 2011-08-12 17:47:58 +0100 | [diff] [blame] | 503 | }; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 504 | |
Josef Gajdusek | 5a059bd | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 505 | /* Beware: Y and Z are exchanged on HMC5883 and 5983 */ |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 506 | static const struct iio_chan_spec hmc5883_channels[] = { |
Peter Meerwald | 39c1882 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 507 | HMC5843_CHANNEL(X, 0), |
| 508 | HMC5843_CHANNEL(Z, 1), |
| 509 | HMC5843_CHANNEL(Y, 2), |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 510 | IIO_CHAN_SOFT_TIMESTAMP(3), |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 511 | }; |
| 512 | |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 513 | static const struct iio_chan_spec hmc5983_channels[] = { |
| 514 | HMC5983_CHANNEL(X, 0), |
| 515 | HMC5983_CHANNEL(Z, 1), |
| 516 | HMC5983_CHANNEL(Y, 2), |
| 517 | IIO_CHAN_SOFT_TIMESTAMP(3), |
| 518 | }; |
| 519 | |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 520 | static struct attribute *hmc5843_attributes[] = { |
Peter Meerwald | ae6f54d | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 521 | &iio_dev_attr_scale_available.dev_attr.attr, |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 522 | &iio_dev_attr_sampling_frequency_available.dev_attr.attr, |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 523 | NULL |
| 524 | }; |
| 525 | |
| 526 | static const struct attribute_group hmc5843_group = { |
| 527 | .attrs = hmc5843_attributes, |
| 528 | }; |
| 529 | |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 530 | static const struct hmc5843_chip_info hmc5843_chip_info_tbl[] = { |
| 531 | [HMC5843_ID] = { |
| 532 | .channels = hmc5843_channels, |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 533 | .regval_to_samp_freq = hmc5843_regval_to_samp_freq, |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 534 | .n_regval_to_samp_freq = |
| 535 | ARRAY_SIZE(hmc5843_regval_to_samp_freq), |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 536 | .regval_to_nanoscale = hmc5843_regval_to_nanoscale, |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 537 | .n_regval_to_nanoscale = |
| 538 | ARRAY_SIZE(hmc5843_regval_to_nanoscale), |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 539 | }, |
| 540 | [HMC5883_ID] = { |
| 541 | .channels = hmc5883_channels, |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 542 | .regval_to_samp_freq = hmc5883_regval_to_samp_freq, |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 543 | .n_regval_to_samp_freq = |
| 544 | ARRAY_SIZE(hmc5883_regval_to_samp_freq), |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 545 | .regval_to_nanoscale = hmc5883_regval_to_nanoscale, |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 546 | .n_regval_to_nanoscale = |
| 547 | ARRAY_SIZE(hmc5883_regval_to_nanoscale), |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 548 | }, |
| 549 | [HMC5883L_ID] = { |
| 550 | .channels = hmc5883_channels, |
Peter Meerwald | d4dc0a3 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 551 | .regval_to_samp_freq = hmc5883_regval_to_samp_freq, |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 552 | .n_regval_to_samp_freq = |
| 553 | ARRAY_SIZE(hmc5883_regval_to_samp_freq), |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 554 | .regval_to_nanoscale = hmc5883l_regval_to_nanoscale, |
Josef Gajdusek | 585f7ce | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 555 | .n_regval_to_nanoscale = |
| 556 | ARRAY_SIZE(hmc5883l_regval_to_nanoscale), |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 557 | }, |
Josef Gajdusek | 5a059bd | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 558 | [HMC5983_ID] = { |
Cristina Moraru | 1c7be4c | 2016-02-15 00:37:37 +0200 | [diff] [blame] | 559 | .channels = hmc5983_channels, |
Josef Gajdusek | 5a059bd | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 560 | .regval_to_samp_freq = hmc5983_regval_to_samp_freq, |
| 561 | .n_regval_to_samp_freq = |
| 562 | ARRAY_SIZE(hmc5983_regval_to_samp_freq), |
| 563 | .regval_to_nanoscale = hmc5883l_regval_to_nanoscale, |
| 564 | .n_regval_to_nanoscale = |
| 565 | ARRAY_SIZE(hmc5883l_regval_to_nanoscale), |
| 566 | } |
Peter Meerwald | 357fcff | 2012-05-17 02:28:13 +0200 | [diff] [blame] | 567 | }; |
| 568 | |
Peter Meerwald | 9d5ad0c | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 569 | static int hmc5843_init(struct hmc5843_data *data) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 570 | { |
Peter Meerwald | 9d5ad0c | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 571 | int ret; |
| 572 | u8 id[3]; |
| 573 | |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 574 | ret = regmap_bulk_read(data->regmap, HMC5843_ID_REG, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 575 | id, ARRAY_SIZE(id)); |
Peter Meerwald | 9d5ad0c | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 576 | if (ret < 0) |
| 577 | return ret; |
| 578 | if (id[0] != 'H' || id[1] != '4' || id[2] != '3') { |
Josef Gajdusek | 5a059bd | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 579 | dev_err(data->dev, "no HMC5843/5883/5883L/5983 sensor\n"); |
Peter Meerwald | 9d5ad0c | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 580 | return -ENODEV; |
| 581 | } |
| 582 | |
| 583 | ret = hmc5843_set_meas_conf(data, HMC5843_MEAS_CONF_NORMAL); |
| 584 | if (ret < 0) |
| 585 | return ret; |
| 586 | ret = hmc5843_set_samp_freq(data, HMC5843_RATE_DEFAULT); |
| 587 | if (ret < 0) |
| 588 | return ret; |
| 589 | ret = hmc5843_set_range_gain(data, HMC5843_RANGE_GAIN_DEFAULT); |
| 590 | if (ret < 0) |
| 591 | return ret; |
| 592 | return hmc5843_set_mode(data, HMC5843_MODE_CONVERSION_CONTINUOUS); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 593 | } |
| 594 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 595 | static const struct iio_info hmc5843_info = { |
| 596 | .attrs = &hmc5843_group, |
Cristina Moraru | 7247645 | 2016-02-15 00:37:39 +0200 | [diff] [blame] | 597 | .read_raw = &hmc5843_read_raw, |
| 598 | .write_raw = &hmc5843_write_raw, |
| 599 | .write_raw_get_fmt = &hmc5843_write_raw_get_fmt, |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 600 | .driver_module = THIS_MODULE, |
| 601 | }; |
| 602 | |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 603 | static const unsigned long hmc5843_scan_masks[] = {0x7, 0}; |
| 604 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 605 | int hmc5843_common_suspend(struct device *dev) |
| 606 | { |
| 607 | return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)), |
Cristina Moraru | c099225 | 2016-02-08 00:21:48 +0200 | [diff] [blame] | 608 | HMC5843_MODE_SLEEP); |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 609 | } |
| 610 | EXPORT_SYMBOL(hmc5843_common_suspend); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 611 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 612 | int hmc5843_common_resume(struct device *dev) |
| 613 | { |
| 614 | return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)), |
Cristina Moraru | c099225 | 2016-02-08 00:21:48 +0200 | [diff] [blame] | 615 | HMC5843_MODE_CONVERSION_CONTINUOUS); |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 616 | } |
| 617 | EXPORT_SYMBOL(hmc5843_common_resume); |
Josef Gajdusek | f326a52 | 2014-07-22 16:00:00 +0100 | [diff] [blame] | 618 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 619 | int hmc5843_common_probe(struct device *dev, struct regmap *regmap, |
Yong Li | 70b2737 | 2015-08-12 21:25:46 +0800 | [diff] [blame] | 620 | enum hmc5843_ids id, const char *name) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 621 | { |
| 622 | struct hmc5843_data *data; |
Jonathan Cameron | 88fa4de | 2011-06-27 13:07:56 +0100 | [diff] [blame] | 623 | struct iio_dev *indio_dev; |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 624 | int ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 625 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 626 | indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); |
Cristina Opriceana | 9fb163f | 2015-03-19 21:04:42 +0200 | [diff] [blame] | 627 | if (!indio_dev) |
Peter Meerwald | a6dcb71b | 2013-09-03 02:05:00 +0100 | [diff] [blame] | 628 | return -ENOMEM; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 629 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 630 | dev_set_drvdata(dev, indio_dev); |
| 631 | |
Peter Meerwald | 16b91a4 | 2012-05-16 18:22:05 +0200 | [diff] [blame] | 632 | /* default settings at probe */ |
| 633 | data = iio_priv(indio_dev); |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 634 | data->dev = dev; |
| 635 | data->regmap = regmap; |
| 636 | data->variant = &hmc5843_chip_info_tbl[id]; |
Peter Meerwald | 8e2e297 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 637 | mutex_init(&data->lock); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 638 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 639 | indio_dev->dev.parent = dev; |
Yong Li | 70b2737 | 2015-08-12 21:25:46 +0800 | [diff] [blame] | 640 | indio_dev->name = name; |
Jonathan Cameron | 88fa4de | 2011-06-27 13:07:56 +0100 | [diff] [blame] | 641 | indio_dev->info = &hmc5843_info; |
Jonathan Cameron | 88fa4de | 2011-06-27 13:07:56 +0100 | [diff] [blame] | 642 | indio_dev->modes = INDIO_DIRECT_MODE; |
Peter Meerwald | 8e2e297 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 643 | indio_dev->channels = data->variant->channels; |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 644 | indio_dev->num_channels = 4; |
| 645 | indio_dev->available_scan_masks = hmc5843_scan_masks; |
Peter Meerwald | 8e2e297 | 2013-09-19 20:35:00 +0100 | [diff] [blame] | 646 | |
Peter Meerwald | 9d5ad0c | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 647 | ret = hmc5843_init(data); |
| 648 | if (ret < 0) |
| 649 | return ret; |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 650 | |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 651 | ret = iio_triggered_buffer_setup(indio_dev, NULL, |
Cristina Opriceana | 7079f21 | 2015-03-19 21:06:42 +0200 | [diff] [blame] | 652 | hmc5843_trigger_handler, NULL); |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 653 | if (ret < 0) |
Cristina Opriceana | e676705 | 2015-03-22 20:42:42 +0200 | [diff] [blame] | 654 | goto buffer_setup_err; |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 655 | |
| 656 | ret = iio_device_register(indio_dev); |
| 657 | if (ret < 0) |
| 658 | goto buffer_cleanup; |
Peter Meerwald | c7c34af | 2012-05-17 02:28:10 +0200 | [diff] [blame] | 659 | |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 660 | return 0; |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 661 | |
| 662 | buffer_cleanup: |
| 663 | iio_triggered_buffer_cleanup(indio_dev); |
Cristina Opriceana | e676705 | 2015-03-22 20:42:42 +0200 | [diff] [blame] | 664 | buffer_setup_err: |
| 665 | hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP); |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 666 | return ret; |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 667 | } |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 668 | EXPORT_SYMBOL(hmc5843_common_probe); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 669 | |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 670 | int hmc5843_common_remove(struct device *dev) |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 671 | { |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 672 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
Peter Meerwald | cb9b9a8 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 673 | |
| 674 | iio_device_unregister(indio_dev); |
| 675 | iio_triggered_buffer_cleanup(indio_dev); |
| 676 | |
Peter Meerwald | 094509b1 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 677 | /* sleep mode to save power */ |
Peter Meerwald | 6224875 | 2013-10-16 23:19:00 +0100 | [diff] [blame] | 678 | hmc5843_set_mode(iio_priv(indio_dev), HMC5843_MODE_SLEEP); |
Jonathan Cameron | 88fa4de | 2011-06-27 13:07:56 +0100 | [diff] [blame] | 679 | |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 680 | return 0; |
| 681 | } |
Josef Gajdusek | fc35a91 | 2014-07-22 16:01:00 +0100 | [diff] [blame] | 682 | EXPORT_SYMBOL(hmc5843_common_remove); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 683 | |
Sachin Kamat | b658a37 | 2013-09-05 10:29:00 +0100 | [diff] [blame] | 684 | MODULE_AUTHOR("Shubhrajyoti Datta <shubhrajyoti@ti.com>"); |
Josef Gajdusek | 5a059bd | 2014-07-22 16:02:00 +0100 | [diff] [blame] | 685 | MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 core driver"); |
Shubhrajyoti D | b4e1782 | 2010-07-17 18:32:52 +0530 | [diff] [blame] | 686 | MODULE_LICENSE("GPL"); |