^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * MS5611 pressure and temperature sensor driver (I2C bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * 7-bit I2C slave addresses:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * 0x77 (CSB pin low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * 0x76 (CSB pin high)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "ms5611.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static int ms5611_i2c_reset(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return i2c_smbus_write_byte(st->client, MS5611_RESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int ms5611_i2c_read_prom_word(struct device *dev, int index, u16 *word)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) ret = i2c_smbus_read_word_swapped(st->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) MS5611_READ_PROM_WORD + (index << 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) *word = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int ms5611_i2c_read_adc(struct ms5611_state *st, s32 *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) u8 buf[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) ret = i2c_smbus_read_i2c_block_data(st->client, MS5611_READ_ADC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 3, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *val = get_unaligned_be24(&buf[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int ms5611_i2c_read_adc_temp_and_pressure(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) s32 *temp, s32 *pressure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) const struct ms5611_osr *osr = st->temp_osr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) ret = i2c_smbus_write_byte(st->client, osr->cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) usleep_range(osr->conv_usec, osr->conv_usec + (osr->conv_usec / 10UL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) ret = ms5611_i2c_read_adc(st, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) osr = st->pressure_osr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret = i2c_smbus_write_byte(st->client, osr->cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) usleep_range(osr->conv_usec, osr->conv_usec + (osr->conv_usec / 10UL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return ms5611_i2c_read_adc(st, pressure);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static int ms5611_i2c_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct ms5611_state *st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) I2C_FUNC_SMBUS_WRITE_BYTE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) I2C_FUNC_SMBUS_READ_WORD_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) I2C_FUNC_SMBUS_READ_I2C_BLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) st = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) st->reset = ms5611_i2c_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) st->read_prom_word = ms5611_i2c_read_prom_word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) st->read_adc_temp_and_pressure = ms5611_i2c_read_adc_temp_and_pressure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) st->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return ms5611_probe(indio_dev, &client->dev, id->name, id->driver_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int ms5611_i2c_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return ms5611_remove(i2c_get_clientdata(client));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static const struct of_device_id ms5611_i2c_matches[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) { .compatible = "meas,ms5611" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) { .compatible = "meas,ms5607" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) MODULE_DEVICE_TABLE(of, ms5611_i2c_matches);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static const struct i2c_device_id ms5611_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) { "ms5611", MS5611 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) { "ms5607", MS5607 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) MODULE_DEVICE_TABLE(i2c, ms5611_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static struct i2c_driver ms5611_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .name = "ms5611",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .of_match_table = ms5611_i2c_matches,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .id_table = ms5611_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .probe = ms5611_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .remove = ms5611_i2c_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) module_i2c_driver(ms5611_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) MODULE_AUTHOR("Tomasz Duszynski <tduszyns@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) MODULE_DESCRIPTION("MS5611 i2c driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags