^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * ms5637.c - Support for Measurement-Specialties MS5637, MS5805
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * MS5837 and MS8607 pressure & temperature sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2015 Measurement-Specialties
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * (7-bit I2C slave address 0x76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * http://www.meas-spec.com/downloads/MS5637-02BA03.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * http://www.meas-spec.com/downloads/MS5805-02BA01.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * http://www.meas-spec.com/downloads/MS5837-30BA.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * http://www.meas-spec.com/downloads/MS8607-02BA01.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/iio/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "../common/ms_sensors/ms_sensors_i2c.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static const int ms5637_samp_freq[6] = { 960, 480, 240, 120, 60, 30 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /* String copy of the above const for readability purpose */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static const char ms5637_show_samp_freq[] = "960 480 240 120 60 30";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int ms5637_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct iio_chan_spec const *channel, int *val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int temperature;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned int pressure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct ms_tp_dev *dev_data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) case IIO_CHAN_INFO_PROCESSED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ret = ms_sensors_read_temp_and_pressure(dev_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) &temperature,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) &pressure);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) switch (channel->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) case IIO_TEMP: /* in milli °C */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) *val = temperature;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) case IIO_PRESSURE: /* in kPa */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) *val = pressure / 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *val2 = (pressure % 1000) * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) case IIO_CHAN_INFO_SAMP_FREQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *val = ms5637_samp_freq[dev_data->res_index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static int ms5637_write_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int val, int val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct ms_tp_dev *dev_data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case IIO_CHAN_INFO_SAMP_FREQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) i = ARRAY_SIZE(ms5637_samp_freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) while (i-- > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (val == ms5637_samp_freq[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (i < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) dev_data->res_index = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static const struct iio_chan_spec ms5637_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .type = IIO_PRESSURE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(ms5637_show_samp_freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static struct attribute *ms5637_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) &iio_const_attr_sampling_frequency_available.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static const struct attribute_group ms5637_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .attrs = ms5637_attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static const struct iio_info ms5637_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .read_raw = ms5637_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .write_raw = ms5637_write_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .attrs = &ms5637_attribute_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int ms5637_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct ms_tp_dev *dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) I2C_FUNC_SMBUS_READ_WORD_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) I2C_FUNC_SMBUS_WRITE_BYTE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) "Adapter does not support some i2c transaction\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*dev_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) dev_data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) dev_data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) dev_data->res_index = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) mutex_init(&dev_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) indio_dev->info = &ms5637_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) indio_dev->name = id->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) indio_dev->channels = ms5637_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) indio_dev->num_channels = ARRAY_SIZE(ms5637_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ret = ms_sensors_reset(client, 0x1E, 3000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) ret = ms_sensors_tp_read_prom(dev_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return devm_iio_device_register(&client->dev, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static const struct i2c_device_id ms5637_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {"ms5637", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {"ms5805", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {"ms5837", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {"ms8607-temppressure", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) MODULE_DEVICE_TABLE(i2c, ms5637_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static const struct of_device_id ms5637_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) { .compatible = "meas,ms5637", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) { .compatible = "meas,ms5805", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) { .compatible = "meas,ms5837", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) { .compatible = "meas,ms8607-temppressure", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) MODULE_DEVICE_TABLE(of, ms5637_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static struct i2c_driver ms5637_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .probe = ms5637_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .id_table = ms5637_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) .name = "ms5637",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .of_match_table = ms5637_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) module_i2c_driver(ms5637_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) MODULE_DESCRIPTION("Measurement-Specialties ms5637 temperature & pressure driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) MODULE_AUTHOR("William Markezana <william.markezana@meas-spec.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) MODULE_AUTHOR("Ludovic Tancerel <ludovic.tancerel@maplehightech.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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