Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014 Intel Corporation |
| 3 | * |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 4 | * Driver for Bosch Sensortec BMP180 and BMP280 digital pressure sensor. |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 10 | * Datasheet: |
| 11 | * https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMP180-DS000-121.pdf |
| 12 | * https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMP280-DS001-12.pdf |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 13 | * https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280_DS001-11.pdf |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | #define pr_fmt(fmt) "bmp280: " fmt |
| 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/i2c.h> |
| 20 | #include <linux/acpi.h> |
Linus Walleij | 78f5027 | 2016-06-30 03:48:46 +0200 | [diff] [blame] | 21 | #include <linux/of.h> |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 22 | #include <linux/regmap.h> |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 23 | #include <linux/delay.h> |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 24 | #include <linux/iio/iio.h> |
| 25 | #include <linux/iio/sysfs.h> |
Linus Walleij | c5842b4 | 2016-06-30 03:48:47 +0200 | [diff] [blame] | 26 | #include <linux/gpio/consumer.h> |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 27 | #include <linux/regulator/consumer.h> |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 28 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 29 | /* BMP280 specific registers */ |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 30 | #define BMP280_REG_HUMIDITY_LSB 0xFE |
| 31 | #define BMP280_REG_HUMIDITY_MSB 0xFD |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 32 | #define BMP280_REG_TEMP_XLSB 0xFC |
| 33 | #define BMP280_REG_TEMP_LSB 0xFB |
| 34 | #define BMP280_REG_TEMP_MSB 0xFA |
| 35 | #define BMP280_REG_PRESS_XLSB 0xF9 |
| 36 | #define BMP280_REG_PRESS_LSB 0xF8 |
| 37 | #define BMP280_REG_PRESS_MSB 0xF7 |
| 38 | |
| 39 | #define BMP280_REG_CONFIG 0xF5 |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 40 | #define BMP280_REG_CTRL_MEAS 0xF4 |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 41 | #define BMP280_REG_STATUS 0xF3 |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 42 | #define BMP280_REG_CTRL_HUMIDITY 0xF2 |
| 43 | |
| 44 | /* Due to non linear mapping, and data sizes we can't do a bulk read */ |
| 45 | #define BMP280_REG_COMP_H1 0xA1 |
| 46 | #define BMP280_REG_COMP_H2 0xE1 |
| 47 | #define BMP280_REG_COMP_H3 0xE3 |
| 48 | #define BMP280_REG_COMP_H4 0xE4 |
| 49 | #define BMP280_REG_COMP_H5 0xE5 |
| 50 | #define BMP280_REG_COMP_H6 0xE7 |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 51 | |
| 52 | #define BMP280_REG_COMP_TEMP_START 0x88 |
| 53 | #define BMP280_COMP_TEMP_REG_COUNT 6 |
| 54 | |
| 55 | #define BMP280_REG_COMP_PRESS_START 0x8E |
| 56 | #define BMP280_COMP_PRESS_REG_COUNT 18 |
| 57 | |
| 58 | #define BMP280_FILTER_MASK (BIT(4) | BIT(3) | BIT(2)) |
| 59 | #define BMP280_FILTER_OFF 0 |
| 60 | #define BMP280_FILTER_2X BIT(2) |
| 61 | #define BMP280_FILTER_4X BIT(3) |
| 62 | #define BMP280_FILTER_8X (BIT(3) | BIT(2)) |
| 63 | #define BMP280_FILTER_16X BIT(4) |
| 64 | |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 65 | #define BMP280_OSRS_HUMIDITY_MASK (BIT(2) | BIT(1) | BIT(0)) |
| 66 | #define BMP280_OSRS_HUMIDITIY_X(osrs_h) ((osrs_h) << 0) |
| 67 | #define BMP280_OSRS_HUMIDITY_SKIP 0 |
| 68 | #define BMP280_OSRS_HUMIDITY_1X BMP280_OSRS_HUMIDITIY_X(1) |
| 69 | #define BMP280_OSRS_HUMIDITY_2X BMP280_OSRS_HUMIDITIY_X(2) |
| 70 | #define BMP280_OSRS_HUMIDITY_4X BMP280_OSRS_HUMIDITIY_X(3) |
| 71 | #define BMP280_OSRS_HUMIDITY_8X BMP280_OSRS_HUMIDITIY_X(4) |
| 72 | #define BMP280_OSRS_HUMIDITY_16X BMP280_OSRS_HUMIDITIY_X(5) |
| 73 | |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 74 | #define BMP280_OSRS_TEMP_MASK (BIT(7) | BIT(6) | BIT(5)) |
| 75 | #define BMP280_OSRS_TEMP_SKIP 0 |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 76 | #define BMP280_OSRS_TEMP_X(osrs_t) ((osrs_t) << 5) |
| 77 | #define BMP280_OSRS_TEMP_1X BMP280_OSRS_TEMP_X(1) |
| 78 | #define BMP280_OSRS_TEMP_2X BMP280_OSRS_TEMP_X(2) |
| 79 | #define BMP280_OSRS_TEMP_4X BMP280_OSRS_TEMP_X(3) |
| 80 | #define BMP280_OSRS_TEMP_8X BMP280_OSRS_TEMP_X(4) |
| 81 | #define BMP280_OSRS_TEMP_16X BMP280_OSRS_TEMP_X(5) |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 82 | |
| 83 | #define BMP280_OSRS_PRESS_MASK (BIT(4) | BIT(3) | BIT(2)) |
| 84 | #define BMP280_OSRS_PRESS_SKIP 0 |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 85 | #define BMP280_OSRS_PRESS_X(osrs_p) ((osrs_p) << 2) |
| 86 | #define BMP280_OSRS_PRESS_1X BMP280_OSRS_PRESS_X(1) |
| 87 | #define BMP280_OSRS_PRESS_2X BMP280_OSRS_PRESS_X(2) |
| 88 | #define BMP280_OSRS_PRESS_4X BMP280_OSRS_PRESS_X(3) |
| 89 | #define BMP280_OSRS_PRESS_8X BMP280_OSRS_PRESS_X(4) |
| 90 | #define BMP280_OSRS_PRESS_16X BMP280_OSRS_PRESS_X(5) |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 91 | |
| 92 | #define BMP280_MODE_MASK (BIT(1) | BIT(0)) |
| 93 | #define BMP280_MODE_SLEEP 0 |
| 94 | #define BMP280_MODE_FORCED BIT(0) |
| 95 | #define BMP280_MODE_NORMAL (BIT(1) | BIT(0)) |
| 96 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 97 | /* BMP180 specific registers */ |
| 98 | #define BMP180_REG_OUT_XLSB 0xF8 |
| 99 | #define BMP180_REG_OUT_LSB 0xF7 |
| 100 | #define BMP180_REG_OUT_MSB 0xF6 |
| 101 | |
| 102 | #define BMP180_REG_CALIB_START 0xAA |
| 103 | #define BMP180_REG_CALIB_COUNT 22 |
| 104 | |
| 105 | #define BMP180_MEAS_SCO BIT(5) |
| 106 | #define BMP180_MEAS_TEMP (0x0E | BMP180_MEAS_SCO) |
| 107 | #define BMP180_MEAS_PRESS_X(oss) ((oss) << 6 | 0x14 | BMP180_MEAS_SCO) |
| 108 | #define BMP180_MEAS_PRESS_1X BMP180_MEAS_PRESS_X(0) |
| 109 | #define BMP180_MEAS_PRESS_2X BMP180_MEAS_PRESS_X(1) |
| 110 | #define BMP180_MEAS_PRESS_4X BMP180_MEAS_PRESS_X(2) |
| 111 | #define BMP180_MEAS_PRESS_8X BMP180_MEAS_PRESS_X(3) |
| 112 | |
| 113 | /* BMP180 and BMP280 common registers */ |
| 114 | #define BMP280_REG_CTRL_MEAS 0xF4 |
| 115 | #define BMP280_REG_RESET 0xE0 |
| 116 | #define BMP280_REG_ID 0xD0 |
| 117 | |
| 118 | #define BMP180_CHIP_ID 0x55 |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 119 | #define BMP280_CHIP_ID 0x58 |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 120 | #define BME280_CHIP_ID 0x60 |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 121 | #define BMP280_SOFT_RESET_VAL 0xB6 |
| 122 | |
| 123 | struct bmp280_data { |
| 124 | struct i2c_client *client; |
| 125 | struct mutex lock; |
| 126 | struct regmap *regmap; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 127 | const struct bmp280_chip_info *chip_info; |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 128 | struct regulator *vddd; |
| 129 | struct regulator *vdda; |
| 130 | unsigned int start_up_time; /* in milliseconds */ |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 131 | |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 132 | /* log of base 2 of oversampling rate */ |
| 133 | u8 oversampling_press; |
| 134 | u8 oversampling_temp; |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 135 | u8 oversampling_humid; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 136 | |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 137 | /* |
| 138 | * Carryover value from temperature conversion, used in pressure |
| 139 | * calculation. |
| 140 | */ |
| 141 | s32 t_fine; |
| 142 | }; |
| 143 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 144 | struct bmp280_chip_info { |
| 145 | const struct regmap_config *regmap_config; |
| 146 | |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 147 | const int *oversampling_temp_avail; |
| 148 | int num_oversampling_temp_avail; |
| 149 | |
| 150 | const int *oversampling_press_avail; |
| 151 | int num_oversampling_press_avail; |
| 152 | |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 153 | const int *oversampling_humid_avail; |
| 154 | int num_oversampling_humid_avail; |
| 155 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 156 | int (*chip_config)(struct bmp280_data *); |
| 157 | int (*read_temp)(struct bmp280_data *, int *); |
| 158 | int (*read_press)(struct bmp280_data *, int *, int *); |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 159 | int (*read_humid)(struct bmp280_data *, int *, int *); |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 160 | }; |
| 161 | |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 162 | /* |
| 163 | * These enums are used for indexing into the array of compensation |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 164 | * parameters for BMP280. |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 165 | */ |
| 166 | enum { T1, T2, T3 }; |
| 167 | enum { P1, P2, P3, P4, P5, P6, P7, P8, P9 }; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 168 | |
| 169 | static const struct iio_chan_spec bmp280_channels[] = { |
| 170 | { |
| 171 | .type = IIO_PRESSURE, |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 172 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | |
| 173 | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 174 | }, |
| 175 | { |
| 176 | .type = IIO_TEMP, |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 177 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | |
| 178 | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 179 | }, |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 180 | { |
| 181 | .type = IIO_HUMIDITYRELATIVE, |
| 182 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | |
| 183 | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), |
| 184 | }, |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 185 | }; |
| 186 | |
| 187 | static bool bmp280_is_writeable_reg(struct device *dev, unsigned int reg) |
| 188 | { |
| 189 | switch (reg) { |
| 190 | case BMP280_REG_CONFIG: |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 191 | case BMP280_REG_CTRL_HUMIDITY: |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 192 | case BMP280_REG_CTRL_MEAS: |
| 193 | case BMP280_REG_RESET: |
| 194 | return true; |
| 195 | default: |
| 196 | return false; |
| 197 | }; |
| 198 | } |
| 199 | |
| 200 | static bool bmp280_is_volatile_reg(struct device *dev, unsigned int reg) |
| 201 | { |
| 202 | switch (reg) { |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 203 | case BMP280_REG_HUMIDITY_LSB: |
| 204 | case BMP280_REG_HUMIDITY_MSB: |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 205 | case BMP280_REG_TEMP_XLSB: |
| 206 | case BMP280_REG_TEMP_LSB: |
| 207 | case BMP280_REG_TEMP_MSB: |
| 208 | case BMP280_REG_PRESS_XLSB: |
| 209 | case BMP280_REG_PRESS_LSB: |
| 210 | case BMP280_REG_PRESS_MSB: |
| 211 | case BMP280_REG_STATUS: |
| 212 | return true; |
| 213 | default: |
| 214 | return false; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | static const struct regmap_config bmp280_regmap_config = { |
| 219 | .reg_bits = 8, |
| 220 | .val_bits = 8, |
| 221 | |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 222 | .max_register = BMP280_REG_HUMIDITY_LSB, |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 223 | .cache_type = REGCACHE_RBTREE, |
| 224 | |
| 225 | .writeable_reg = bmp280_is_writeable_reg, |
| 226 | .volatile_reg = bmp280_is_volatile_reg, |
| 227 | }; |
| 228 | |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 229 | /* |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 230 | * Returns humidity in percent, resolution is 0.01 percent. Output value of |
| 231 | * "47445" represents 47445/1024 = 46.333 %RH. |
| 232 | * |
| 233 | * Taken from BME280 datasheet, Section 4.2.3, "Compensation formula". |
| 234 | */ |
| 235 | |
| 236 | static u32 bmp280_compensate_humidity(struct bmp280_data *data, |
| 237 | s32 adc_humidity) |
| 238 | { |
| 239 | struct device *dev = &data->client->dev; |
| 240 | unsigned int H1, H3, tmp; |
| 241 | int H2, H4, H5, H6, ret, var; |
| 242 | |
| 243 | ret = regmap_read(data->regmap, BMP280_REG_COMP_H1, &H1); |
| 244 | if (ret < 0) { |
| 245 | dev_err(dev, "failed to read H1 comp value\n"); |
| 246 | return ret; |
| 247 | } |
| 248 | |
| 249 | ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_H2, &tmp, 2); |
| 250 | if (ret < 0) { |
| 251 | dev_err(dev, "failed to read H2 comp value\n"); |
| 252 | return ret; |
| 253 | } |
| 254 | H2 = sign_extend32(le16_to_cpu(tmp), 15); |
| 255 | |
| 256 | ret = regmap_read(data->regmap, BMP280_REG_COMP_H3, &H3); |
| 257 | if (ret < 0) { |
| 258 | dev_err(dev, "failed to read H3 comp value\n"); |
| 259 | return ret; |
| 260 | } |
| 261 | |
| 262 | ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_H4, &tmp, 2); |
| 263 | if (ret < 0) { |
| 264 | dev_err(dev, "failed to read H4 comp value\n"); |
| 265 | return ret; |
| 266 | } |
| 267 | H4 = sign_extend32(((be16_to_cpu(tmp) >> 4) & 0xff0) | |
| 268 | (be16_to_cpu(tmp) & 0xf), 11); |
| 269 | |
| 270 | ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_H5, &tmp, 2); |
| 271 | if (ret < 0) { |
| 272 | dev_err(dev, "failed to read H5 comp value\n"); |
| 273 | return ret; |
| 274 | } |
| 275 | H5 = sign_extend32(((le16_to_cpu(tmp) >> 4) & 0xfff), 11); |
| 276 | |
| 277 | ret = regmap_read(data->regmap, BMP280_REG_COMP_H6, &tmp); |
| 278 | if (ret < 0) { |
| 279 | dev_err(dev, "failed to read H6 comp value\n"); |
| 280 | return ret; |
| 281 | } |
| 282 | H6 = sign_extend32(tmp, 7); |
| 283 | |
| 284 | var = ((s32)data->t_fine) - 76800; |
| 285 | var = ((((adc_humidity << 14) - (H4 << 20) - (H5 * var)) + 16384) >> 15) |
| 286 | * (((((((var * H6) >> 10) * (((var * H3) >> 11) + 32768)) >> 10) |
| 287 | + 2097152) * H2 + 8192) >> 14); |
| 288 | var -= ((((var >> 15) * (var >> 15)) >> 7) * H1) >> 4; |
| 289 | |
| 290 | return var >> 12; |
| 291 | }; |
| 292 | |
| 293 | /* |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 294 | * Returns temperature in DegC, resolution is 0.01 DegC. Output value of |
| 295 | * "5123" equals 51.23 DegC. t_fine carries fine temperature as global |
| 296 | * value. |
| 297 | * |
| 298 | * Taken from datasheet, Section 3.11.3, "Compensation formula". |
| 299 | */ |
| 300 | static s32 bmp280_compensate_temp(struct bmp280_data *data, |
| 301 | s32 adc_temp) |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 302 | { |
| 303 | int ret; |
Hartmut Knaack | 44cf379 | 2014-12-19 23:59:25 +0100 | [diff] [blame] | 304 | s32 var1, var2; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 305 | __le16 buf[BMP280_COMP_TEMP_REG_COUNT / 2]; |
| 306 | |
| 307 | ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_TEMP_START, |
| 308 | buf, BMP280_COMP_TEMP_REG_COUNT); |
| 309 | if (ret < 0) { |
| 310 | dev_err(&data->client->dev, |
| 311 | "failed to read temperature calibration parameters\n"); |
| 312 | return ret; |
| 313 | } |
| 314 | |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 315 | /* |
| 316 | * The double casts are necessary because le16_to_cpu returns an |
| 317 | * unsigned 16-bit value. Casting that value directly to a |
| 318 | * signed 32-bit will not do proper sign extension. |
| 319 | * |
| 320 | * Conversely, T1 and P1 are unsigned values, so they can be |
| 321 | * cast straight to the larger type. |
| 322 | */ |
| 323 | var1 = (((adc_temp >> 3) - ((s32)le16_to_cpu(buf[T1]) << 1)) * |
| 324 | ((s32)(s16)le16_to_cpu(buf[T2]))) >> 11; |
| 325 | var2 = (((((adc_temp >> 4) - ((s32)le16_to_cpu(buf[T1]))) * |
| 326 | ((adc_temp >> 4) - ((s32)le16_to_cpu(buf[T1])))) >> 12) * |
| 327 | ((s32)(s16)le16_to_cpu(buf[T3]))) >> 14; |
Irina Tirdea | abad398 | 2015-04-08 18:26:12 +0300 | [diff] [blame] | 328 | data->t_fine = var1 + var2; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 329 | |
Hartmut Knaack | 44cf379 | 2014-12-19 23:59:25 +0100 | [diff] [blame] | 330 | return (data->t_fine * 5 + 128) >> 8; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | /* |
| 334 | * Returns pressure in Pa as unsigned 32 bit integer in Q24.8 format (24 |
| 335 | * integer bits and 8 fractional bits). Output value of "24674867" |
| 336 | * represents 24674867/256 = 96386.2 Pa = 963.862 hPa |
| 337 | * |
| 338 | * Taken from datasheet, Section 3.11.3, "Compensation formula". |
| 339 | */ |
| 340 | static u32 bmp280_compensate_press(struct bmp280_data *data, |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 341 | s32 adc_press) |
| 342 | { |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 343 | int ret; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 344 | s64 var1, var2, p; |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 345 | __le16 buf[BMP280_COMP_PRESS_REG_COUNT / 2]; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 346 | |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 347 | ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_PRESS_START, |
| 348 | buf, BMP280_COMP_PRESS_REG_COUNT); |
| 349 | if (ret < 0) { |
| 350 | dev_err(&data->client->dev, |
| 351 | "failed to read pressure calibration parameters\n"); |
| 352 | return ret; |
| 353 | } |
| 354 | |
| 355 | var1 = ((s64)data->t_fine) - 128000; |
| 356 | var2 = var1 * var1 * (s64)(s16)le16_to_cpu(buf[P6]); |
Hartmut Knaack | 44cf379 | 2014-12-19 23:59:25 +0100 | [diff] [blame] | 357 | var2 += (var1 * (s64)(s16)le16_to_cpu(buf[P5])) << 17; |
| 358 | var2 += ((s64)(s16)le16_to_cpu(buf[P4])) << 35; |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 359 | var1 = ((var1 * var1 * (s64)(s16)le16_to_cpu(buf[P3])) >> 8) + |
| 360 | ((var1 * (s64)(s16)le16_to_cpu(buf[P2])) << 12); |
| 361 | var1 = ((((s64)1) << 47) + var1) * ((s64)le16_to_cpu(buf[P1])) >> 33; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 362 | |
| 363 | if (var1 == 0) |
| 364 | return 0; |
| 365 | |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 366 | p = ((((s64)1048576 - adc_press) << 31) - var2) * 3125; |
Vlad Dogaru | 46ee98a | 2014-10-23 15:52:00 +0100 | [diff] [blame] | 367 | p = div64_s64(p, var1); |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 368 | var1 = (((s64)(s16)le16_to_cpu(buf[P9])) * (p >> 13) * (p >> 13)) >> 25; |
| 369 | var2 = (((s64)(s16)le16_to_cpu(buf[P8])) * p) >> 19; |
| 370 | p = ((p + var1 + var2) >> 8) + (((s64)(s16)le16_to_cpu(buf[P7])) << 4); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 371 | |
Hartmut Knaack | 44cf379 | 2014-12-19 23:59:25 +0100 | [diff] [blame] | 372 | return (u32)p; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | static int bmp280_read_temp(struct bmp280_data *data, |
| 376 | int *val) |
| 377 | { |
| 378 | int ret; |
| 379 | __be32 tmp = 0; |
| 380 | s32 adc_temp, comp_temp; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 381 | |
| 382 | ret = regmap_bulk_read(data->regmap, BMP280_REG_TEMP_MSB, |
| 383 | (u8 *) &tmp, 3); |
| 384 | if (ret < 0) { |
| 385 | dev_err(&data->client->dev, "failed to read temperature\n"); |
| 386 | return ret; |
| 387 | } |
| 388 | |
| 389 | adc_temp = be32_to_cpu(tmp) >> 12; |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 390 | comp_temp = bmp280_compensate_temp(data, adc_temp); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 391 | |
| 392 | /* |
| 393 | * val might be NULL if we're called by the read_press routine, |
| 394 | * who only cares about the carry over t_fine value. |
| 395 | */ |
| 396 | if (val) { |
| 397 | *val = comp_temp * 10; |
| 398 | return IIO_VAL_INT; |
| 399 | } |
| 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int bmp280_read_press(struct bmp280_data *data, |
| 405 | int *val, int *val2) |
| 406 | { |
| 407 | int ret; |
| 408 | __be32 tmp = 0; |
| 409 | s32 adc_press; |
| 410 | u32 comp_press; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 411 | |
| 412 | /* Read and compensate temperature so we get a reading of t_fine. */ |
| 413 | ret = bmp280_read_temp(data, NULL); |
| 414 | if (ret < 0) |
| 415 | return ret; |
| 416 | |
| 417 | ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB, |
| 418 | (u8 *) &tmp, 3); |
| 419 | if (ret < 0) { |
| 420 | dev_err(&data->client->dev, "failed to read pressure\n"); |
| 421 | return ret; |
| 422 | } |
| 423 | |
| 424 | adc_press = be32_to_cpu(tmp) >> 12; |
Vlad Dogaru | 0f8994b | 2014-11-20 14:00:48 +0200 | [diff] [blame] | 425 | comp_press = bmp280_compensate_press(data, adc_press); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 426 | |
Hartmut Knaack | 81ebe85 | 2014-10-31 01:22:00 +0000 | [diff] [blame] | 427 | *val = comp_press; |
| 428 | *val2 = 256000; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 429 | |
Hartmut Knaack | 81ebe85 | 2014-10-31 01:22:00 +0000 | [diff] [blame] | 430 | return IIO_VAL_FRACTIONAL; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 431 | } |
| 432 | |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 433 | static int bmp280_read_humid(struct bmp280_data *data, int *val, int *val2) |
| 434 | { |
| 435 | int ret; |
| 436 | __be16 tmp = 0; |
| 437 | s32 adc_humidity; |
| 438 | u32 comp_humidity; |
| 439 | |
| 440 | /* Read and compensate temperature so we get a reading of t_fine. */ |
| 441 | ret = bmp280_read_temp(data, NULL); |
| 442 | if (ret < 0) |
| 443 | return ret; |
| 444 | |
| 445 | ret = regmap_bulk_read(data->regmap, BMP280_REG_HUMIDITY_MSB, |
| 446 | (u8 *) &tmp, 2); |
| 447 | if (ret < 0) { |
| 448 | dev_err(&data->client->dev, "failed to read humidity\n"); |
| 449 | return ret; |
| 450 | } |
| 451 | |
| 452 | adc_humidity = be16_to_cpu(tmp); |
| 453 | comp_humidity = bmp280_compensate_humidity(data, adc_humidity); |
| 454 | |
| 455 | *val = comp_humidity; |
| 456 | *val2 = 1024; |
| 457 | |
| 458 | return IIO_VAL_FRACTIONAL; |
| 459 | } |
| 460 | |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 461 | static int bmp280_read_raw(struct iio_dev *indio_dev, |
| 462 | struct iio_chan_spec const *chan, |
| 463 | int *val, int *val2, long mask) |
| 464 | { |
| 465 | int ret; |
| 466 | struct bmp280_data *data = iio_priv(indio_dev); |
| 467 | |
| 468 | mutex_lock(&data->lock); |
| 469 | |
| 470 | switch (mask) { |
| 471 | case IIO_CHAN_INFO_PROCESSED: |
| 472 | switch (chan->type) { |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 473 | case IIO_HUMIDITYRELATIVE: |
| 474 | ret = data->chip_info->read_humid(data, val, val2); |
| 475 | break; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 476 | case IIO_PRESSURE: |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 477 | ret = data->chip_info->read_press(data, val, val2); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 478 | break; |
| 479 | case IIO_TEMP: |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 480 | ret = data->chip_info->read_temp(data, val); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 481 | break; |
| 482 | default: |
| 483 | ret = -EINVAL; |
| 484 | break; |
| 485 | } |
| 486 | break; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 487 | case IIO_CHAN_INFO_OVERSAMPLING_RATIO: |
| 488 | switch (chan->type) { |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 489 | case IIO_HUMIDITYRELATIVE: |
| 490 | *val = 1 << data->oversampling_humid; |
| 491 | ret = IIO_VAL_INT; |
| 492 | break; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 493 | case IIO_PRESSURE: |
| 494 | *val = 1 << data->oversampling_press; |
| 495 | ret = IIO_VAL_INT; |
| 496 | break; |
| 497 | case IIO_TEMP: |
| 498 | *val = 1 << data->oversampling_temp; |
| 499 | ret = IIO_VAL_INT; |
| 500 | break; |
| 501 | default: |
| 502 | ret = -EINVAL; |
| 503 | break; |
| 504 | } |
| 505 | break; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 506 | default: |
| 507 | ret = -EINVAL; |
| 508 | break; |
| 509 | } |
| 510 | |
| 511 | mutex_unlock(&data->lock); |
| 512 | |
| 513 | return ret; |
| 514 | } |
| 515 | |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 516 | static int bmp280_write_oversampling_ratio_humid(struct bmp280_data *data, |
| 517 | int val) |
| 518 | { |
| 519 | int i; |
| 520 | const int *avail = data->chip_info->oversampling_humid_avail; |
| 521 | const int n = data->chip_info->num_oversampling_humid_avail; |
| 522 | |
| 523 | for (i = 0; i < n; i++) { |
| 524 | if (avail[i] == val) { |
| 525 | data->oversampling_humid = ilog2(val); |
| 526 | |
| 527 | return data->chip_info->chip_config(data); |
| 528 | } |
| 529 | } |
| 530 | return -EINVAL; |
| 531 | } |
| 532 | |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 533 | static int bmp280_write_oversampling_ratio_temp(struct bmp280_data *data, |
| 534 | int val) |
| 535 | { |
| 536 | int i; |
| 537 | const int *avail = data->chip_info->oversampling_temp_avail; |
| 538 | const int n = data->chip_info->num_oversampling_temp_avail; |
| 539 | |
| 540 | for (i = 0; i < n; i++) { |
| 541 | if (avail[i] == val) { |
| 542 | data->oversampling_temp = ilog2(val); |
| 543 | |
| 544 | return data->chip_info->chip_config(data); |
| 545 | } |
| 546 | } |
| 547 | return -EINVAL; |
| 548 | } |
| 549 | |
| 550 | static int bmp280_write_oversampling_ratio_press(struct bmp280_data *data, |
| 551 | int val) |
| 552 | { |
| 553 | int i; |
| 554 | const int *avail = data->chip_info->oversampling_press_avail; |
| 555 | const int n = data->chip_info->num_oversampling_press_avail; |
| 556 | |
| 557 | for (i = 0; i < n; i++) { |
| 558 | if (avail[i] == val) { |
| 559 | data->oversampling_press = ilog2(val); |
| 560 | |
| 561 | return data->chip_info->chip_config(data); |
| 562 | } |
| 563 | } |
| 564 | return -EINVAL; |
| 565 | } |
| 566 | |
| 567 | static int bmp280_write_raw(struct iio_dev *indio_dev, |
| 568 | struct iio_chan_spec const *chan, |
| 569 | int val, int val2, long mask) |
| 570 | { |
| 571 | int ret = 0; |
| 572 | struct bmp280_data *data = iio_priv(indio_dev); |
| 573 | |
| 574 | switch (mask) { |
| 575 | case IIO_CHAN_INFO_OVERSAMPLING_RATIO: |
| 576 | mutex_lock(&data->lock); |
| 577 | switch (chan->type) { |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 578 | case IIO_HUMIDITYRELATIVE: |
| 579 | ret = bmp280_write_oversampling_ratio_humid(data, val); |
| 580 | break; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 581 | case IIO_PRESSURE: |
| 582 | ret = bmp280_write_oversampling_ratio_press(data, val); |
| 583 | break; |
| 584 | case IIO_TEMP: |
| 585 | ret = bmp280_write_oversampling_ratio_temp(data, val); |
| 586 | break; |
| 587 | default: |
| 588 | ret = -EINVAL; |
| 589 | break; |
| 590 | } |
| 591 | mutex_unlock(&data->lock); |
| 592 | break; |
| 593 | default: |
| 594 | return -EINVAL; |
| 595 | } |
| 596 | |
| 597 | return ret; |
| 598 | } |
| 599 | |
| 600 | static ssize_t bmp280_show_avail(char *buf, const int *vals, const int n) |
| 601 | { |
| 602 | size_t len = 0; |
| 603 | int i; |
| 604 | |
| 605 | for (i = 0; i < n; i++) |
| 606 | len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", vals[i]); |
| 607 | |
| 608 | buf[len - 1] = '\n'; |
| 609 | |
| 610 | return len; |
| 611 | } |
| 612 | |
| 613 | static ssize_t bmp280_show_temp_oversampling_avail(struct device *dev, |
| 614 | struct device_attribute *attr, char *buf) |
| 615 | { |
| 616 | struct bmp280_data *data = iio_priv(dev_to_iio_dev(dev)); |
| 617 | |
| 618 | return bmp280_show_avail(buf, data->chip_info->oversampling_temp_avail, |
| 619 | data->chip_info->num_oversampling_temp_avail); |
| 620 | } |
| 621 | |
| 622 | static ssize_t bmp280_show_press_oversampling_avail(struct device *dev, |
| 623 | struct device_attribute *attr, char *buf) |
| 624 | { |
| 625 | struct bmp280_data *data = iio_priv(dev_to_iio_dev(dev)); |
| 626 | |
| 627 | return bmp280_show_avail(buf, data->chip_info->oversampling_press_avail, |
| 628 | data->chip_info->num_oversampling_press_avail); |
| 629 | } |
| 630 | |
| 631 | static IIO_DEVICE_ATTR(in_temp_oversampling_ratio_available, |
| 632 | S_IRUGO, bmp280_show_temp_oversampling_avail, NULL, 0); |
| 633 | |
| 634 | static IIO_DEVICE_ATTR(in_pressure_oversampling_ratio_available, |
| 635 | S_IRUGO, bmp280_show_press_oversampling_avail, NULL, 0); |
| 636 | |
| 637 | static struct attribute *bmp280_attributes[] = { |
| 638 | &iio_dev_attr_in_temp_oversampling_ratio_available.dev_attr.attr, |
| 639 | &iio_dev_attr_in_pressure_oversampling_ratio_available.dev_attr.attr, |
| 640 | NULL, |
| 641 | }; |
| 642 | |
| 643 | static const struct attribute_group bmp280_attrs_group = { |
| 644 | .attrs = bmp280_attributes, |
| 645 | }; |
| 646 | |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 647 | static const struct iio_info bmp280_info = { |
| 648 | .driver_module = THIS_MODULE, |
| 649 | .read_raw = &bmp280_read_raw, |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 650 | .write_raw = &bmp280_write_raw, |
| 651 | .attrs = &bmp280_attrs_group, |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 652 | }; |
| 653 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 654 | static int bmp280_chip_config(struct bmp280_data *data) |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 655 | { |
| 656 | int ret; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 657 | u8 osrs = BMP280_OSRS_TEMP_X(data->oversampling_temp + 1) | |
| 658 | BMP280_OSRS_PRESS_X(data->oversampling_press + 1); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 659 | |
| 660 | ret = regmap_update_bits(data->regmap, BMP280_REG_CTRL_MEAS, |
| 661 | BMP280_OSRS_TEMP_MASK | |
| 662 | BMP280_OSRS_PRESS_MASK | |
| 663 | BMP280_MODE_MASK, |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 664 | osrs | BMP280_MODE_NORMAL); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 665 | if (ret < 0) { |
| 666 | dev_err(&data->client->dev, |
Hartmut Knaack | 44cf379 | 2014-12-19 23:59:25 +0100 | [diff] [blame] | 667 | "failed to write ctrl_meas register\n"); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 668 | return ret; |
| 669 | } |
| 670 | |
| 671 | ret = regmap_update_bits(data->regmap, BMP280_REG_CONFIG, |
| 672 | BMP280_FILTER_MASK, |
| 673 | BMP280_FILTER_4X); |
| 674 | if (ret < 0) { |
| 675 | dev_err(&data->client->dev, |
| 676 | "failed to write config register\n"); |
| 677 | return ret; |
| 678 | } |
| 679 | |
| 680 | return ret; |
| 681 | } |
| 682 | |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 683 | static const int bmp280_oversampling_avail[] = { 1, 2, 4, 8, 16 }; |
| 684 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 685 | static const struct bmp280_chip_info bmp280_chip_info = { |
| 686 | .regmap_config = &bmp280_regmap_config, |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 687 | |
| 688 | .oversampling_temp_avail = bmp280_oversampling_avail, |
| 689 | .num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail), |
| 690 | |
| 691 | .oversampling_press_avail = bmp280_oversampling_avail, |
| 692 | .num_oversampling_press_avail = ARRAY_SIZE(bmp280_oversampling_avail), |
| 693 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 694 | .chip_config = bmp280_chip_config, |
| 695 | .read_temp = bmp280_read_temp, |
| 696 | .read_press = bmp280_read_press, |
| 697 | }; |
| 698 | |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 699 | static int bme280_chip_config(struct bmp280_data *data) |
| 700 | { |
| 701 | int ret = bmp280_chip_config(data); |
| 702 | u8 osrs = BMP280_OSRS_HUMIDITIY_X(data->oversampling_humid + 1); |
| 703 | |
| 704 | if (ret < 0) |
| 705 | return ret; |
| 706 | |
| 707 | return regmap_update_bits(data->regmap, BMP280_REG_CTRL_HUMIDITY, |
| 708 | BMP280_OSRS_HUMIDITY_MASK, osrs); |
| 709 | } |
| 710 | |
| 711 | static const struct bmp280_chip_info bme280_chip_info = { |
| 712 | .regmap_config = &bmp280_regmap_config, |
| 713 | |
| 714 | .oversampling_temp_avail = bmp280_oversampling_avail, |
| 715 | .num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail), |
| 716 | |
| 717 | .oversampling_press_avail = bmp280_oversampling_avail, |
| 718 | .num_oversampling_press_avail = ARRAY_SIZE(bmp280_oversampling_avail), |
| 719 | |
| 720 | .oversampling_humid_avail = bmp280_oversampling_avail, |
| 721 | .num_oversampling_humid_avail = ARRAY_SIZE(bmp280_oversampling_avail), |
| 722 | |
| 723 | .chip_config = bme280_chip_config, |
| 724 | .read_temp = bmp280_read_temp, |
| 725 | .read_press = bmp280_read_press, |
| 726 | .read_humid = bmp280_read_humid, |
| 727 | }; |
| 728 | |
| 729 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 730 | static bool bmp180_is_writeable_reg(struct device *dev, unsigned int reg) |
| 731 | { |
| 732 | switch (reg) { |
| 733 | case BMP280_REG_CTRL_MEAS: |
| 734 | case BMP280_REG_RESET: |
| 735 | return true; |
| 736 | default: |
| 737 | return false; |
| 738 | }; |
| 739 | } |
| 740 | |
| 741 | static bool bmp180_is_volatile_reg(struct device *dev, unsigned int reg) |
| 742 | { |
| 743 | switch (reg) { |
| 744 | case BMP180_REG_OUT_XLSB: |
| 745 | case BMP180_REG_OUT_LSB: |
| 746 | case BMP180_REG_OUT_MSB: |
| 747 | case BMP280_REG_CTRL_MEAS: |
| 748 | return true; |
| 749 | default: |
| 750 | return false; |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | static const struct regmap_config bmp180_regmap_config = { |
| 755 | .reg_bits = 8, |
| 756 | .val_bits = 8, |
| 757 | |
| 758 | .max_register = BMP180_REG_OUT_XLSB, |
| 759 | .cache_type = REGCACHE_RBTREE, |
| 760 | |
| 761 | .writeable_reg = bmp180_is_writeable_reg, |
| 762 | .volatile_reg = bmp180_is_volatile_reg, |
| 763 | }; |
| 764 | |
| 765 | static int bmp180_measure(struct bmp280_data *data, u8 ctrl_meas) |
| 766 | { |
| 767 | int ret; |
| 768 | const int conversion_time_max[] = { 4500, 7500, 13500, 25500 }; |
| 769 | unsigned int delay_us; |
| 770 | unsigned int ctrl; |
| 771 | |
| 772 | ret = regmap_write(data->regmap, BMP280_REG_CTRL_MEAS, ctrl_meas); |
| 773 | if (ret) |
| 774 | return ret; |
| 775 | |
| 776 | if (ctrl_meas == BMP180_MEAS_TEMP) |
| 777 | delay_us = 4500; |
| 778 | else |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 779 | delay_us = conversion_time_max[data->oversampling_press]; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 780 | |
| 781 | usleep_range(delay_us, delay_us + 1000); |
| 782 | |
| 783 | ret = regmap_read(data->regmap, BMP280_REG_CTRL_MEAS, &ctrl); |
| 784 | if (ret) |
| 785 | return ret; |
| 786 | |
| 787 | /* The value of this bit reset to "0" after conversion is complete */ |
| 788 | if (ctrl & BMP180_MEAS_SCO) |
| 789 | return -EIO; |
| 790 | |
| 791 | return 0; |
| 792 | } |
| 793 | |
| 794 | static int bmp180_read_adc_temp(struct bmp280_data *data, int *val) |
| 795 | { |
| 796 | int ret; |
| 797 | __be16 tmp = 0; |
| 798 | |
| 799 | ret = bmp180_measure(data, BMP180_MEAS_TEMP); |
| 800 | if (ret) |
| 801 | return ret; |
| 802 | |
| 803 | ret = regmap_bulk_read(data->regmap, BMP180_REG_OUT_MSB, (u8 *)&tmp, 2); |
| 804 | if (ret) |
| 805 | return ret; |
| 806 | |
| 807 | *val = be16_to_cpu(tmp); |
| 808 | |
| 809 | return 0; |
| 810 | } |
| 811 | |
| 812 | /* |
| 813 | * These enums are used for indexing into the array of calibration |
| 814 | * coefficients for BMP180. |
| 815 | */ |
| 816 | enum { AC1, AC2, AC3, AC4, AC5, AC6, B1, B2, MB, MC, MD }; |
| 817 | |
| 818 | struct bmp180_calib { |
| 819 | s16 AC1; |
| 820 | s16 AC2; |
| 821 | s16 AC3; |
| 822 | u16 AC4; |
| 823 | u16 AC5; |
| 824 | u16 AC6; |
| 825 | s16 B1; |
| 826 | s16 B2; |
| 827 | s16 MB; |
| 828 | s16 MC; |
| 829 | s16 MD; |
| 830 | }; |
| 831 | |
| 832 | static int bmp180_read_calib(struct bmp280_data *data, |
| 833 | struct bmp180_calib *calib) |
| 834 | { |
| 835 | int ret; |
| 836 | int i; |
| 837 | __be16 buf[BMP180_REG_CALIB_COUNT / 2]; |
| 838 | |
| 839 | ret = regmap_bulk_read(data->regmap, BMP180_REG_CALIB_START, buf, |
| 840 | sizeof(buf)); |
| 841 | |
| 842 | if (ret < 0) |
| 843 | return ret; |
| 844 | |
| 845 | /* None of the words has the value 0 or 0xFFFF */ |
| 846 | for (i = 0; i < ARRAY_SIZE(buf); i++) { |
| 847 | if (buf[i] == cpu_to_be16(0) || buf[i] == cpu_to_be16(0xffff)) |
| 848 | return -EIO; |
| 849 | } |
| 850 | |
| 851 | calib->AC1 = be16_to_cpu(buf[AC1]); |
| 852 | calib->AC2 = be16_to_cpu(buf[AC2]); |
| 853 | calib->AC3 = be16_to_cpu(buf[AC3]); |
| 854 | calib->AC4 = be16_to_cpu(buf[AC4]); |
| 855 | calib->AC5 = be16_to_cpu(buf[AC5]); |
| 856 | calib->AC6 = be16_to_cpu(buf[AC6]); |
| 857 | calib->B1 = be16_to_cpu(buf[B1]); |
| 858 | calib->B2 = be16_to_cpu(buf[B2]); |
| 859 | calib->MB = be16_to_cpu(buf[MB]); |
| 860 | calib->MC = be16_to_cpu(buf[MC]); |
| 861 | calib->MD = be16_to_cpu(buf[MD]); |
| 862 | |
| 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | /* |
| 867 | * Returns temperature in DegC, resolution is 0.1 DegC. |
| 868 | * t_fine carries fine temperature as global value. |
| 869 | * |
| 870 | * Taken from datasheet, Section 3.5, "Calculating pressure and temperature". |
| 871 | */ |
| 872 | static s32 bmp180_compensate_temp(struct bmp280_data *data, s32 adc_temp) |
| 873 | { |
| 874 | int ret; |
| 875 | s32 x1, x2; |
| 876 | struct bmp180_calib calib; |
| 877 | |
| 878 | ret = bmp180_read_calib(data, &calib); |
| 879 | if (ret < 0) { |
| 880 | dev_err(&data->client->dev, |
| 881 | "failed to read calibration coefficients\n"); |
| 882 | return ret; |
| 883 | } |
| 884 | |
| 885 | x1 = ((adc_temp - calib.AC6) * calib.AC5) >> 15; |
| 886 | x2 = (calib.MC << 11) / (x1 + calib.MD); |
| 887 | data->t_fine = x1 + x2; |
| 888 | |
| 889 | return (data->t_fine + 8) >> 4; |
| 890 | } |
| 891 | |
| 892 | static int bmp180_read_temp(struct bmp280_data *data, int *val) |
| 893 | { |
| 894 | int ret; |
| 895 | s32 adc_temp, comp_temp; |
| 896 | |
| 897 | ret = bmp180_read_adc_temp(data, &adc_temp); |
| 898 | if (ret) |
| 899 | return ret; |
| 900 | |
| 901 | comp_temp = bmp180_compensate_temp(data, adc_temp); |
| 902 | |
| 903 | /* |
| 904 | * val might be NULL if we're called by the read_press routine, |
| 905 | * who only cares about the carry over t_fine value. |
| 906 | */ |
| 907 | if (val) { |
| 908 | *val = comp_temp * 100; |
| 909 | return IIO_VAL_INT; |
| 910 | } |
| 911 | |
| 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | static int bmp180_read_adc_press(struct bmp280_data *data, int *val) |
| 916 | { |
| 917 | int ret; |
| 918 | __be32 tmp = 0; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 919 | u8 oss = data->oversampling_press; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 920 | |
| 921 | ret = bmp180_measure(data, BMP180_MEAS_PRESS_X(oss)); |
| 922 | if (ret) |
| 923 | return ret; |
| 924 | |
| 925 | ret = regmap_bulk_read(data->regmap, BMP180_REG_OUT_MSB, (u8 *)&tmp, 3); |
| 926 | if (ret) |
| 927 | return ret; |
| 928 | |
| 929 | *val = (be32_to_cpu(tmp) >> 8) >> (8 - oss); |
| 930 | |
| 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * Returns pressure in Pa, resolution is 1 Pa. |
| 936 | * |
| 937 | * Taken from datasheet, Section 3.5, "Calculating pressure and temperature". |
| 938 | */ |
| 939 | static u32 bmp180_compensate_press(struct bmp280_data *data, s32 adc_press) |
| 940 | { |
| 941 | int ret; |
| 942 | s32 x1, x2, x3, p; |
| 943 | s32 b3, b6; |
| 944 | u32 b4, b7; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 945 | s32 oss = data->oversampling_press; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 946 | struct bmp180_calib calib; |
| 947 | |
| 948 | ret = bmp180_read_calib(data, &calib); |
| 949 | if (ret < 0) { |
| 950 | dev_err(&data->client->dev, |
| 951 | "failed to read calibration coefficients\n"); |
| 952 | return ret; |
| 953 | } |
| 954 | |
| 955 | b6 = data->t_fine - 4000; |
| 956 | x1 = (calib.B2 * (b6 * b6 >> 12)) >> 11; |
| 957 | x2 = calib.AC2 * b6 >> 11; |
| 958 | x3 = x1 + x2; |
| 959 | b3 = ((((s32)calib.AC1 * 4 + x3) << oss) + 2) / 4; |
| 960 | x1 = calib.AC3 * b6 >> 13; |
| 961 | x2 = (calib.B1 * ((b6 * b6) >> 12)) >> 16; |
| 962 | x3 = (x1 + x2 + 2) >> 2; |
| 963 | b4 = calib.AC4 * (u32)(x3 + 32768) >> 15; |
| 964 | b7 = ((u32)adc_press - b3) * (50000 >> oss); |
| 965 | if (b7 < 0x80000000) |
| 966 | p = (b7 * 2) / b4; |
| 967 | else |
| 968 | p = (b7 / b4) * 2; |
| 969 | |
| 970 | x1 = (p >> 8) * (p >> 8); |
| 971 | x1 = (x1 * 3038) >> 16; |
| 972 | x2 = (-7357 * p) >> 16; |
| 973 | |
| 974 | return p + ((x1 + x2 + 3791) >> 4); |
| 975 | } |
| 976 | |
| 977 | static int bmp180_read_press(struct bmp280_data *data, |
| 978 | int *val, int *val2) |
| 979 | { |
| 980 | int ret; |
| 981 | s32 adc_press; |
| 982 | u32 comp_press; |
| 983 | |
| 984 | /* Read and compensate temperature so we get a reading of t_fine. */ |
| 985 | ret = bmp180_read_temp(data, NULL); |
| 986 | if (ret) |
| 987 | return ret; |
| 988 | |
| 989 | ret = bmp180_read_adc_press(data, &adc_press); |
| 990 | if (ret) |
| 991 | return ret; |
| 992 | |
| 993 | comp_press = bmp180_compensate_press(data, adc_press); |
| 994 | |
| 995 | *val = comp_press; |
| 996 | *val2 = 1000; |
| 997 | |
| 998 | return IIO_VAL_FRACTIONAL; |
| 999 | } |
| 1000 | |
| 1001 | static int bmp180_chip_config(struct bmp280_data *data) |
| 1002 | { |
| 1003 | return 0; |
| 1004 | } |
| 1005 | |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 1006 | static const int bmp180_oversampling_temp_avail[] = { 1 }; |
| 1007 | static const int bmp180_oversampling_press_avail[] = { 1, 2, 4, 8 }; |
| 1008 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1009 | static const struct bmp280_chip_info bmp180_chip_info = { |
| 1010 | .regmap_config = &bmp180_regmap_config, |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 1011 | |
| 1012 | .oversampling_temp_avail = bmp180_oversampling_temp_avail, |
| 1013 | .num_oversampling_temp_avail = |
| 1014 | ARRAY_SIZE(bmp180_oversampling_temp_avail), |
| 1015 | |
| 1016 | .oversampling_press_avail = bmp180_oversampling_press_avail, |
| 1017 | .num_oversampling_press_avail = |
| 1018 | ARRAY_SIZE(bmp180_oversampling_press_avail), |
| 1019 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1020 | .chip_config = bmp180_chip_config, |
| 1021 | .read_temp = bmp180_read_temp, |
| 1022 | .read_press = bmp180_read_press, |
| 1023 | }; |
| 1024 | |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1025 | static int bmp280_probe(struct i2c_client *client, |
| 1026 | const struct i2c_device_id *id) |
| 1027 | { |
| 1028 | int ret; |
| 1029 | struct iio_dev *indio_dev; |
| 1030 | struct bmp280_data *data; |
| 1031 | unsigned int chip_id; |
Linus Walleij | c5842b4 | 2016-06-30 03:48:47 +0200 | [diff] [blame] | 1032 | struct gpio_desc *gpiod; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1033 | |
| 1034 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| 1035 | if (!indio_dev) |
| 1036 | return -ENOMEM; |
| 1037 | |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1038 | data = iio_priv(indio_dev); |
| 1039 | mutex_init(&data->lock); |
| 1040 | data->client = client; |
| 1041 | |
| 1042 | indio_dev->dev.parent = &client->dev; |
| 1043 | indio_dev->name = id->name; |
| 1044 | indio_dev->channels = bmp280_channels; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1045 | indio_dev->info = &bmp280_info; |
| 1046 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 1047 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1048 | switch (id->driver_data) { |
| 1049 | case BMP180_CHIP_ID: |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 1050 | indio_dev->num_channels = 2; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1051 | data->chip_info = &bmp180_chip_info; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 1052 | data->oversampling_press = ilog2(8); |
| 1053 | data->oversampling_temp = ilog2(1); |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1054 | data->start_up_time = 10; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1055 | break; |
| 1056 | case BMP280_CHIP_ID: |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 1057 | indio_dev->num_channels = 2; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1058 | data->chip_info = &bmp280_chip_info; |
Akinobu Mita | 6297990 | 2016-04-24 22:52:11 +0900 | [diff] [blame] | 1059 | data->oversampling_press = ilog2(16); |
| 1060 | data->oversampling_temp = ilog2(2); |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1061 | data->start_up_time = 2; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1062 | break; |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 1063 | case BME280_CHIP_ID: |
| 1064 | indio_dev->num_channels = 3; |
| 1065 | data->chip_info = &bme280_chip_info; |
| 1066 | data->oversampling_press = ilog2(16); |
| 1067 | data->oversampling_humid = ilog2(16); |
| 1068 | data->oversampling_temp = ilog2(2); |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1069 | data->start_up_time = 2; |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 1070 | break; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1071 | default: |
| 1072 | return -EINVAL; |
| 1073 | } |
| 1074 | |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1075 | /* Bring up regulators */ |
| 1076 | data->vddd = devm_regulator_get(&client->dev, "vddd"); |
| 1077 | if (IS_ERR(data->vddd)) { |
| 1078 | dev_err(&client->dev, "failed to get VDDD regulator\n"); |
| 1079 | return PTR_ERR(data->vddd); |
| 1080 | } |
| 1081 | ret = regulator_enable(data->vddd); |
| 1082 | if (ret) { |
| 1083 | dev_err(&client->dev, "failed to enable VDDD regulator\n"); |
| 1084 | return ret; |
| 1085 | } |
| 1086 | data->vdda = devm_regulator_get(&client->dev, "vdda"); |
| 1087 | if (IS_ERR(data->vdda)) { |
| 1088 | dev_err(&client->dev, "failed to get VDDA regulator\n"); |
| 1089 | ret = PTR_ERR(data->vddd); |
| 1090 | goto out_disable_vddd; |
| 1091 | } |
| 1092 | ret = regulator_enable(data->vdda); |
| 1093 | if (ret) { |
| 1094 | dev_err(&client->dev, "failed to enable VDDA regulator\n"); |
| 1095 | goto out_disable_vddd; |
| 1096 | } |
| 1097 | /* Wait to make sure we started up properly */ |
| 1098 | mdelay(data->start_up_time); |
| 1099 | |
Linus Walleij | c5842b4 | 2016-06-30 03:48:47 +0200 | [diff] [blame] | 1100 | /* Bring chip out of reset if there is an assigned GPIO line */ |
| 1101 | gpiod = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH); |
| 1102 | /* Deassert the signal */ |
| 1103 | if (!IS_ERR(gpiod)) { |
| 1104 | dev_info(&client->dev, "release reset\n"); |
| 1105 | gpiod_set_value(gpiod, 0); |
| 1106 | } |
| 1107 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1108 | data->regmap = devm_regmap_init_i2c(client, |
| 1109 | data->chip_info->regmap_config); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1110 | if (IS_ERR(data->regmap)) { |
| 1111 | dev_err(&client->dev, "failed to allocate register map\n"); |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1112 | ret = PTR_ERR(data->regmap); |
| 1113 | goto out_disable_vdda; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1114 | } |
| 1115 | |
| 1116 | ret = regmap_read(data->regmap, BMP280_REG_ID, &chip_id); |
| 1117 | if (ret < 0) |
| 1118 | return ret; |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1119 | if (chip_id != id->driver_data) { |
Akinobu Mita | a3e5afe | 2016-04-28 23:39:53 +0900 | [diff] [blame] | 1120 | dev_err(&client->dev, "bad chip id. expected %lx got %x\n", |
| 1121 | id->driver_data, chip_id); |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1122 | ret = -EINVAL; |
| 1123 | goto out_disable_vdda; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1124 | } |
| 1125 | |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1126 | ret = data->chip_info->chip_config(data); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1127 | if (ret < 0) |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1128 | goto out_disable_vdda; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1129 | |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1130 | i2c_set_clientdata(client, indio_dev); |
| 1131 | |
| 1132 | ret = iio_device_register(indio_dev); |
| 1133 | if (ret) |
| 1134 | goto out_disable_vdda; |
| 1135 | |
| 1136 | return 0; |
| 1137 | |
| 1138 | out_disable_vdda: |
| 1139 | regulator_disable(data->vdda); |
| 1140 | out_disable_vddd: |
| 1141 | regulator_disable(data->vddd); |
| 1142 | return ret; |
| 1143 | } |
| 1144 | |
| 1145 | static int bmp280_remove(struct i2c_client *client) |
| 1146 | { |
| 1147 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| 1148 | struct bmp280_data *data = iio_priv(indio_dev); |
| 1149 | |
| 1150 | iio_device_unregister(indio_dev); |
| 1151 | regulator_disable(data->vdda); |
| 1152 | regulator_disable(data->vddd); |
| 1153 | return 0; |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1154 | } |
| 1155 | |
| 1156 | static const struct acpi_device_id bmp280_acpi_match[] = { |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1157 | {"BMP0280", BMP280_CHIP_ID }, |
| 1158 | {"BMP0180", BMP180_CHIP_ID }, |
| 1159 | {"BMP0085", BMP180_CHIP_ID }, |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 1160 | {"BME0280", BME280_CHIP_ID }, |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1161 | { }, |
| 1162 | }; |
| 1163 | MODULE_DEVICE_TABLE(acpi, bmp280_acpi_match); |
| 1164 | |
Linus Walleij | 78f5027 | 2016-06-30 03:48:46 +0200 | [diff] [blame] | 1165 | #ifdef CONFIG_OF |
| 1166 | static const struct of_device_id bmp280_of_match[] = { |
| 1167 | { .compatible = "bosch,bme280", .data = (void *)BME280_CHIP_ID }, |
| 1168 | { .compatible = "bosch,bmp280", .data = (void *)BMP280_CHIP_ID }, |
| 1169 | { .compatible = "bosch,bmp180", .data = (void *)BMP180_CHIP_ID }, |
| 1170 | { .compatible = "bosch,bmp085", .data = (void *)BMP180_CHIP_ID }, |
| 1171 | { }, |
| 1172 | }; |
| 1173 | MODULE_DEVICE_TABLE(of, bmp280_of_match); |
| 1174 | #else |
| 1175 | #define bmp280_of_match NULL |
| 1176 | #endif |
| 1177 | |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1178 | static const struct i2c_device_id bmp280_id[] = { |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1179 | {"bmp280", BMP280_CHIP_ID }, |
| 1180 | {"bmp180", BMP180_CHIP_ID }, |
| 1181 | {"bmp085", BMP180_CHIP_ID }, |
Matt Ranostay | 14beaa8 | 2016-05-04 22:57:30 -0700 | [diff] [blame] | 1182 | {"bme280", BME280_CHIP_ID }, |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1183 | { }, |
| 1184 | }; |
| 1185 | MODULE_DEVICE_TABLE(i2c, bmp280_id); |
| 1186 | |
| 1187 | static struct i2c_driver bmp280_driver = { |
| 1188 | .driver = { |
| 1189 | .name = "bmp280", |
| 1190 | .acpi_match_table = ACPI_PTR(bmp280_acpi_match), |
Linus Walleij | 78f5027 | 2016-06-30 03:48:46 +0200 | [diff] [blame] | 1191 | .of_match_table = of_match_ptr(bmp280_of_match), |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1192 | }, |
| 1193 | .probe = bmp280_probe, |
Linus Walleij | bd525e6 | 2016-06-30 03:48:48 +0200 | [diff] [blame^] | 1194 | .remove = bmp280_remove, |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1195 | .id_table = bmp280_id, |
| 1196 | }; |
| 1197 | module_i2c_driver(bmp280_driver); |
| 1198 | |
| 1199 | MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); |
Akinobu Mita | 6dba72e | 2016-04-24 22:52:10 +0900 | [diff] [blame] | 1200 | MODULE_DESCRIPTION("Driver for Bosch Sensortec BMP180/BMP280 pressure and temperature sensor"); |
Vlad Dogaru | d5c9456 | 2014-10-21 11:09:58 +0300 | [diff] [blame] | 1201 | MODULE_LICENSE("GPL v2"); |