^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) * tsys02d.c - Support for Measurement-Specialties tsys02d temperature sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2015 Measurement-Specialties
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * (7-bit I2C slave address 0x40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * http://www.meas-spec.com/downloads/Digital_Sensor_TSYS02D.pdf
^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) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/iio/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "../common/ms_sensors/ms_sensors_i2c.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define TSYS02D_RESET 0xFE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static const int tsys02d_samp_freq[4] = { 20, 40, 70, 140 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /* String copy of the above const for readability purpose */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static const char tsys02d_show_samp_freq[] = "20 40 70 140";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int tsys02d_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct iio_chan_spec const *channel, int *val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) s32 temperature;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct ms_ht_dev *dev_data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) case IIO_CHAN_INFO_PROCESSED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) switch (channel->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) case IIO_TEMP: /* in milli °C */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) ret = ms_sensors_ht_read_temperature(dev_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) &temperature);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *val = temperature;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) case IIO_CHAN_INFO_SAMP_FREQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) *val = tsys02d_samp_freq[dev_data->res_index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^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 tsys02d_write_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int val, int val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct ms_ht_dev *dev_data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) case IIO_CHAN_INFO_SAMP_FREQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) i = ARRAY_SIZE(tsys02d_samp_freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) while (i-- > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (val == tsys02d_samp_freq[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (i < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) mutex_lock(&dev_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) dev_data->res_index = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret = ms_sensors_write_resolution(dev_data, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) mutex_unlock(&dev_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return -EINVAL;
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static const struct iio_chan_spec tsys02d_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_PROCESSED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static ssize_t tsys02_read_battery_low(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct iio_dev *indio_dev = dev_to_iio_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct ms_ht_dev *dev_data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return ms_sensors_show_battery_low(dev_data, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(tsys02d_show_samp_freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static IIO_DEVICE_ATTR(battery_low, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) tsys02_read_battery_low, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static struct attribute *tsys02d_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) &iio_const_attr_sampling_frequency_available.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) &iio_dev_attr_battery_low.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static const struct attribute_group tsys02d_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .attrs = tsys02d_attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static const struct iio_info tsys02d_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .read_raw = tsys02d_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .write_raw = tsys02d_write_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .attrs = &tsys02d_attribute_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static int tsys02d_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct ms_ht_dev *dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) u64 serial_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) I2C_FUNC_SMBUS_WRITE_BYTE_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) I2C_FUNC_SMBUS_WRITE_BYTE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) "Adapter does not support some i2c transaction\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*dev_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) dev_data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) dev_data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) dev_data->res_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) mutex_init(&dev_data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) indio_dev->info = &tsys02d_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) indio_dev->name = id->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) indio_dev->channels = tsys02d_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) indio_dev->num_channels = ARRAY_SIZE(tsys02d_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ret = ms_sensors_reset(client, TSYS02D_RESET, 15000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ret = ms_sensors_read_serial(client, &serial_number);
^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) dev_info(&client->dev, "Serial number : %llx", serial_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return devm_iio_device_register(&client->dev, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static const struct i2c_device_id tsys02d_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {"tsys02d", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) MODULE_DEVICE_TABLE(i2c, tsys02d_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static struct i2c_driver tsys02d_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .probe = tsys02d_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) .id_table = tsys02d_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) .name = "tsys02d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) module_i2c_driver(tsys02d_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) MODULE_DESCRIPTION("Measurement-Specialties tsys02d temperature driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) MODULE_AUTHOR("William Markezana <william.markezana@meas-spec.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) MODULE_AUTHOR("Ludovic Tancerel <ludovic.tancerel@maplehightech.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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