^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) * t5403.c - Support for EPCOS T5403 pressure/temperature sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
^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 0x77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * TODO: end-of-conversion irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/iio/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define T5403_DATA 0xf5 /* data, LSB first, 16 bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define T5403_CALIB_DATA 0x8e /* 10 calibration coeff., LSB first, 16 bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define T5403_SLAVE_ADDR 0x88 /* I2C slave address, 0x77 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define T5403_COMMAND 0xf1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /* command bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define T5403_MODE_SHIFT 3 /* conversion time: 2, 8, 16, 66 ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define T5403_PT BIT(1) /* 0 .. pressure, 1 .. temperature measurement */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define T5403_SCO BIT(0) /* start conversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define T5403_MODE_LOW 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define T5403_MODE_STANDARD 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define T5403_MODE_HIGH 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define T5403_MODE_ULTRA_HIGH 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define T5403_I2C_MASK (~BIT(7))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define T5403_I2C_ADDR 0x77
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static const int t5403_pressure_conv_ms[] = {2, 8, 16, 66};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct t5403_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) __le16 c[10];
^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) #define T5403_C_U16(i) le16_to_cpu(data->c[(i) - 1])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define T5403_C(i) sign_extend32(T5403_C_U16(i), 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int t5403_read(struct t5403_data *data, bool pressure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int wait_time = 3; /* wakeup time in ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int ret = i2c_smbus_write_byte_data(data->client, T5403_COMMAND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) (pressure ? (data->mode << T5403_MODE_SHIFT) : T5403_PT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) T5403_SCO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) wait_time += pressure ? t5403_pressure_conv_ms[data->mode] : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) msleep(wait_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return i2c_smbus_read_word_data(data->client, T5403_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int t5403_comp_pressure(struct t5403_data *data, int *val, int *val2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) s16 t_r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u16 p_r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) s32 S, O, X;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) ret = t5403_read(data, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) t_r = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = t5403_read(data, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) p_r = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* see EPCOS application note */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) S = T5403_C_U16(3) + (s32) T5403_C_U16(4) * t_r / 0x20000 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) T5403_C(5) * t_r / 0x8000 * t_r / 0x80000 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) T5403_C(9) * t_r / 0x8000 * t_r / 0x8000 * t_r / 0x10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) O = T5403_C(6) * 0x4000 + T5403_C(7) * t_r / 8 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) T5403_C(8) * t_r / 0x8000 * t_r / 16 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) T5403_C(9) * t_r / 0x8000 * t_r / 0x10000 * t_r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) X = (S * p_r + O) / 0x4000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) X += ((X - 75000) * (X - 75000) / 0x10000 - 9537) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) T5403_C(10) / 0x10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) *val = X / 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) *val2 = (X % 1000) * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return ret;
^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) static int t5403_comp_temp(struct t5403_data *data, int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) s16 t_r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ret = t5403_read(data, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) t_r = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /* see EPCOS application note */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) *val = ((s32) T5403_C_U16(1) * t_r / 0x100 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) (s32) T5403_C_U16(2) * 0x40) * 1000 / 0x10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static int t5403_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct t5403_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) case IIO_CHAN_INFO_PROCESSED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) switch (chan->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) case IIO_PRESSURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret = t5403_comp_pressure(data, val, val2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) case IIO_TEMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = t5403_comp_temp(data, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) case IIO_CHAN_INFO_INT_TIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) *val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) *val2 = t5403_pressure_conv_ms[data->mode] * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int t5403_write_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int val, int val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct t5403_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) case IIO_CHAN_INFO_INT_TIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (val != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) for (i = 0; i < ARRAY_SIZE(t5403_pressure_conv_ms); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (val2 == t5403_pressure_conv_ms[i] * 1000) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) data->mode = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static const struct iio_chan_spec t5403_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .type = IIO_PRESSURE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) BIT(IIO_CHAN_INFO_INT_TIME),
^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) .type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static IIO_CONST_ATTR_INT_TIME_AVAIL("0.002 0.008 0.016 0.066");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static struct attribute *t5403_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) &iio_const_attr_integration_time_available.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static const struct attribute_group t5403_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .attrs = t5403_attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static const struct iio_info t5403_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) .read_raw = &t5403_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) .write_raw = &t5403_write_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) .attrs = &t5403_attribute_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static int t5403_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct t5403_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) I2C_FUNC_SMBUS_I2C_BLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) ret = i2c_smbus_read_byte_data(client, T5403_SLAVE_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if ((ret & T5403_I2C_MASK) != T5403_I2C_ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) mutex_init(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) indio_dev->info = &t5403_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) indio_dev->name = id->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) indio_dev->channels = t5403_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) indio_dev->num_channels = ARRAY_SIZE(t5403_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) data->mode = T5403_MODE_STANDARD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) ret = i2c_smbus_read_i2c_block_data(data->client, T5403_CALIB_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) sizeof(data->c), (u8 *) data->c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return devm_iio_device_register(&client->dev, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static const struct i2c_device_id t5403_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) { "t5403", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) MODULE_DEVICE_TABLE(i2c, t5403_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static struct i2c_driver t5403_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) .name = "t5403",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) .probe = t5403_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) .id_table = t5403_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) module_i2c_driver(t5403_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) MODULE_DESCRIPTION("EPCOS T5403 pressure/temperature sensor driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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