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- // SPDX-License-Identifier: GPL-2.0+
- // Copyright IBM Corp 2019
- /*
- * The DPS310 is a barometric pressure and temperature sensor.
- * Currently only reading a single temperature is supported by
- * this driver.
- *
- * https://www.infineon.com/dgdl/?fileId=5546d462576f34750157750826c42242
- *
- * Temperature calculation:
- * c0 * 0.5 + c1 * T_raw / kT °C
- *
- * TODO:
- * - Optionally support the FIFO
- */
- #include <linux/i2c.h>
- #include <linux/limits.h>
- #include <linux/math64.h>
- #include <linux/module.h>
- #include <linux/regmap.h>
- #include <linux/iio/iio.h>
- #include <linux/iio/sysfs.h>
- #define DPS310_DEV_NAME "dps310"
- #define DPS310_PRS_B0 0x00
- #define DPS310_PRS_B1 0x01
- #define DPS310_PRS_B2 0x02
- #define DPS310_TMP_B0 0x03
- #define DPS310_TMP_B1 0x04
- #define DPS310_TMP_B2 0x05
- #define DPS310_PRS_CFG 0x06
- #define DPS310_PRS_RATE_BITS GENMASK(6, 4)
- #define DPS310_PRS_PRC_BITS GENMASK(3, 0)
- #define DPS310_TMP_CFG 0x07
- #define DPS310_TMP_RATE_BITS GENMASK(6, 4)
- #define DPS310_TMP_PRC_BITS GENMASK(3, 0)
- #define DPS310_TMP_EXT BIT(7)
- #define DPS310_MEAS_CFG 0x08
- #define DPS310_MEAS_CTRL_BITS GENMASK(2, 0)
- #define DPS310_PRS_EN BIT(0)
- #define DPS310_TEMP_EN BIT(1)
- #define DPS310_BACKGROUND BIT(2)
- #define DPS310_PRS_RDY BIT(4)
- #define DPS310_TMP_RDY BIT(5)
- #define DPS310_SENSOR_RDY BIT(6)
- #define DPS310_COEF_RDY BIT(7)
- #define DPS310_CFG_REG 0x09
- #define DPS310_INT_HL BIT(7)
- #define DPS310_TMP_SHIFT_EN BIT(3)
- #define DPS310_PRS_SHIFT_EN BIT(4)
- #define DPS310_FIFO_EN BIT(5)
- #define DPS310_SPI_EN BIT(6)
- #define DPS310_RESET 0x0c
- #define DPS310_RESET_MAGIC 0x09
- #define DPS310_COEF_BASE 0x10
- /* Make sure sleep time is <= 30ms for usleep_range */
- #define DPS310_POLL_SLEEP_US(t) min(30000, (t) / 8)
- /* Silently handle error in rate value here */
- #define DPS310_POLL_TIMEOUT_US(rc) ((rc) <= 0 ? 1000000 : 1000000 / (rc))
- #define DPS310_PRS_BASE DPS310_PRS_B0
- #define DPS310_TMP_BASE DPS310_TMP_B0
- /*
- * These values (defined in the spec) indicate how to scale the raw register
- * values for each level of precision available.
- */
- static const int scale_factors[] = {
- 524288,
- 1572864,
- 3670016,
- 7864320,
- 253952,
- 516096,
- 1040384,
- 2088960,
- };
- struct dps310_data {
- struct i2c_client *client;
- struct regmap *regmap;
- struct mutex lock; /* Lock for sequential HW access functions */
- s32 c0, c1;
- s32 c00, c10, c20, c30, c01, c11, c21;
- s32 pressure_raw;
- s32 temp_raw;
- bool timeout_recovery_failed;
- };
- static const struct iio_chan_spec dps310_channels[] = {
- {
- .type = IIO_TEMP,
- .info_mask_separate = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO) |
- BIT(IIO_CHAN_INFO_SAMP_FREQ) |
- BIT(IIO_CHAN_INFO_PROCESSED),
- },
- {
- .type = IIO_PRESSURE,
- .info_mask_separate = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO) |
- BIT(IIO_CHAN_INFO_SAMP_FREQ) |
- BIT(IIO_CHAN_INFO_PROCESSED),
- },
- };
- /* To be called after checking the COEF_RDY bit in MEAS_CFG */
- static int dps310_get_coefs(struct dps310_data *data)
- {
- int rc;
- u8 coef[18];
- u32 c0, c1;
- u32 c00, c10, c20, c30, c01, c11, c21;
- /* Read all sensor calibration coefficients from the COEF registers. */
- rc = regmap_bulk_read(data->regmap, DPS310_COEF_BASE, coef,
- sizeof(coef));
- if (rc < 0)
- return rc;
- /*
- * Calculate temperature calibration coefficients c0 and c1. The
- * numbers are 12-bit 2's complement numbers.
- */
- c0 = (coef[0] << 4) | (coef[1] >> 4);
- data->c0 = sign_extend32(c0, 11);
- c1 = ((coef[1] & GENMASK(3, 0)) << 8) | coef[2];
- data->c1 = sign_extend32(c1, 11);
- /*
- * Calculate pressure calibration coefficients. c00 and c10 are 20 bit
- * 2's complement numbers, while the rest are 16 bit 2's complement
- * numbers.
- */
- c00 = (coef[3] << 12) | (coef[4] << 4) | (coef[5] >> 4);
- data->c00 = sign_extend32(c00, 19);
- c10 = ((coef[5] & GENMASK(3, 0)) << 16) | (coef[6] << 8) | coef[7];
- data->c10 = sign_extend32(c10, 19);
- c01 = (coef[8] << 8) | coef[9];
- data->c01 = sign_extend32(c01, 15);
- c11 = (coef[10] << 8) | coef[11];
- data->c11 = sign_extend32(c11, 15);
- c20 = (coef[12] << 8) | coef[13];
- data->c20 = sign_extend32(c20, 15);
- c21 = (coef[14] << 8) | coef[15];
- data->c21 = sign_extend32(c21, 15);
- c30 = (coef[16] << 8) | coef[17];
- data->c30 = sign_extend32(c30, 15);
- return 0;
- }
- /*
- * Some versions of the chip will read temperatures in the ~60C range when
- * it's actually ~20C. This is the manufacturer recommended workaround
- * to correct the issue. The registers used below are undocumented.
- */
- static int dps310_temp_workaround(struct dps310_data *data)
- {
- int rc;
- int reg;
- rc = regmap_read(data->regmap, 0x32, ®);
- if (rc)
- return rc;
- /*
- * If bit 1 is set then the device is okay, and the workaround does not
- * need to be applied
- */
- if (reg & BIT(1))
- return 0;
- rc = regmap_write(data->regmap, 0x0e, 0xA5);
- if (rc)
- return rc;
- rc = regmap_write(data->regmap, 0x0f, 0x96);
- if (rc)
- return rc;
- rc = regmap_write(data->regmap, 0x62, 0x02);
- if (rc)
- return rc;
- rc = regmap_write(data->regmap, 0x0e, 0x00);
- if (rc)
- return rc;
- return regmap_write(data->regmap, 0x0f, 0x00);
- }
- static int dps310_startup(struct dps310_data *data)
- {
- int rc;
- int ready;
- /*
- * Set up pressure sensor in single sample, one measurement per second
- * mode
- */
- rc = regmap_write(data->regmap, DPS310_PRS_CFG, 0);
- if (rc)
- return rc;
- /*
- * Set up external (MEMS) temperature sensor in single sample, one
- * measurement per second mode
- */
- rc = regmap_write(data->regmap, DPS310_TMP_CFG, DPS310_TMP_EXT);
- if (rc)
- return rc;
- /* Temp and pressure shifts are disabled when PRC <= 8 */
- rc = regmap_write_bits(data->regmap, DPS310_CFG_REG,
- DPS310_PRS_SHIFT_EN | DPS310_TMP_SHIFT_EN, 0);
- if (rc)
- return rc;
- /* MEAS_CFG doesn't update correctly unless first written with 0 */
- rc = regmap_write_bits(data->regmap, DPS310_MEAS_CFG,
- DPS310_MEAS_CTRL_BITS, 0);
- if (rc)
- return rc;
- /* Turn on temperature and pressure measurement in the background */
- rc = regmap_write_bits(data->regmap, DPS310_MEAS_CFG,
- DPS310_MEAS_CTRL_BITS, DPS310_PRS_EN |
- DPS310_TEMP_EN | DPS310_BACKGROUND);
- if (rc)
- return rc;
- /*
- * Calibration coefficients required for reporting temperature.
- * They are available 40ms after the device has started
- */
- rc = regmap_read_poll_timeout(data->regmap, DPS310_MEAS_CFG, ready,
- ready & DPS310_COEF_RDY, 10000, 40000);
- if (rc)
- return rc;
- rc = dps310_get_coefs(data);
- if (rc)
- return rc;
- return dps310_temp_workaround(data);
- }
- static int dps310_get_pres_precision(struct dps310_data *data)
- {
- int rc;
- int val;
- rc = regmap_read(data->regmap, DPS310_PRS_CFG, &val);
- if (rc < 0)
- return rc;
- return BIT(val & GENMASK(2, 0));
- }
- static int dps310_get_temp_precision(struct dps310_data *data)
- {
- int rc;
- int val;
- rc = regmap_read(data->regmap, DPS310_TMP_CFG, &val);
- if (rc < 0)
- return rc;
- /*
- * Scale factor is bottom 4 bits of the register, but 1111 is
- * reserved so just grab bottom three
- */
- return BIT(val & GENMASK(2, 0));
- }
- /* Called with lock held */
- static int dps310_set_pres_precision(struct dps310_data *data, int val)
- {
- int rc;
- u8 shift_en;
- if (val < 0 || val > 128)
- return -EINVAL;
- shift_en = val >= 16 ? DPS310_PRS_SHIFT_EN : 0;
- rc = regmap_write_bits(data->regmap, DPS310_CFG_REG,
- DPS310_PRS_SHIFT_EN, shift_en);
- if (rc)
- return rc;
- return regmap_update_bits(data->regmap, DPS310_PRS_CFG,
- DPS310_PRS_PRC_BITS, ilog2(val));
- }
- /* Called with lock held */
- static int dps310_set_temp_precision(struct dps310_data *data, int val)
- {
- int rc;
- u8 shift_en;
- if (val < 0 || val > 128)
- return -EINVAL;
- shift_en = val >= 16 ? DPS310_TMP_SHIFT_EN : 0;
- rc = regmap_write_bits(data->regmap, DPS310_CFG_REG,
- DPS310_TMP_SHIFT_EN, shift_en);
- if (rc)
- return rc;
- return regmap_update_bits(data->regmap, DPS310_TMP_CFG,
- DPS310_TMP_PRC_BITS, ilog2(val));
- }
- /* Called with lock held */
- static int dps310_set_pres_samp_freq(struct dps310_data *data, int freq)
- {
- u8 val;
- if (freq < 0 || freq > 128)
- return -EINVAL;
- val = ilog2(freq) << 4;
- return regmap_update_bits(data->regmap, DPS310_PRS_CFG,
- DPS310_PRS_RATE_BITS, val);
- }
- /* Called with lock held */
- static int dps310_set_temp_samp_freq(struct dps310_data *data, int freq)
- {
- u8 val;
- if (freq < 0 || freq > 128)
- return -EINVAL;
- val = ilog2(freq) << 4;
- return regmap_update_bits(data->regmap, DPS310_TMP_CFG,
- DPS310_TMP_RATE_BITS, val);
- }
- static int dps310_get_pres_samp_freq(struct dps310_data *data)
- {
- int rc;
- int val;
- rc = regmap_read(data->regmap, DPS310_PRS_CFG, &val);
- if (rc < 0)
- return rc;
- return BIT((val & DPS310_PRS_RATE_BITS) >> 4);
- }
- static int dps310_get_temp_samp_freq(struct dps310_data *data)
- {
- int rc;
- int val;
- rc = regmap_read(data->regmap, DPS310_TMP_CFG, &val);
- if (rc < 0)
- return rc;
- return BIT((val & DPS310_TMP_RATE_BITS) >> 4);
- }
- static int dps310_get_pres_k(struct dps310_data *data)
- {
- int rc = dps310_get_pres_precision(data);
- if (rc < 0)
- return rc;
- return scale_factors[ilog2(rc)];
- }
- static int dps310_get_temp_k(struct dps310_data *data)
- {
- int rc = dps310_get_temp_precision(data);
- if (rc < 0)
- return rc;
- return scale_factors[ilog2(rc)];
- }
- static int dps310_reset_wait(struct dps310_data *data)
- {
- int rc;
- rc = regmap_write(data->regmap, DPS310_RESET, DPS310_RESET_MAGIC);
- if (rc)
- return rc;
- /* Wait for device chip access: 15ms in specification */
- usleep_range(15000, 55000);
- return 0;
- }
- static int dps310_reset_reinit(struct dps310_data *data)
- {
- int rc;
- rc = dps310_reset_wait(data);
- if (rc)
- return rc;
- return dps310_startup(data);
- }
- static int dps310_ready_status(struct dps310_data *data, int ready_bit, int timeout)
- {
- int sleep = DPS310_POLL_SLEEP_US(timeout);
- int ready;
- return regmap_read_poll_timeout(data->regmap, DPS310_MEAS_CFG, ready, ready & ready_bit,
- sleep, timeout);
- }
- static int dps310_ready(struct dps310_data *data, int ready_bit, int timeout)
- {
- int rc;
- rc = dps310_ready_status(data, ready_bit, timeout);
- if (rc) {
- if (rc == -ETIMEDOUT && !data->timeout_recovery_failed) {
- /* Reset and reinitialize the chip. */
- if (dps310_reset_reinit(data)) {
- data->timeout_recovery_failed = true;
- } else {
- /* Try again to get sensor ready status. */
- if (dps310_ready_status(data, ready_bit, timeout))
- data->timeout_recovery_failed = true;
- else
- return 0;
- }
- }
- return rc;
- }
- data->timeout_recovery_failed = false;
- return 0;
- }
- static int dps310_read_pres_raw(struct dps310_data *data)
- {
- int rc;
- int rate;
- int timeout;
- s32 raw;
- u8 val[3];
- if (mutex_lock_interruptible(&data->lock))
- return -EINTR;
- rate = dps310_get_pres_samp_freq(data);
- timeout = DPS310_POLL_TIMEOUT_US(rate);
- /* Poll for sensor readiness; base the timeout upon the sample rate. */
- rc = dps310_ready(data, DPS310_PRS_RDY, timeout);
- if (rc)
- goto done;
- rc = regmap_bulk_read(data->regmap, DPS310_PRS_BASE, val, sizeof(val));
- if (rc < 0)
- goto done;
- raw = (val[0] << 16) | (val[1] << 8) | val[2];
- data->pressure_raw = sign_extend32(raw, 23);
- done:
- mutex_unlock(&data->lock);
- return rc;
- }
- /* Called with lock held */
- static int dps310_read_temp_ready(struct dps310_data *data)
- {
- int rc;
- u8 val[3];
- s32 raw;
- rc = regmap_bulk_read(data->regmap, DPS310_TMP_BASE, val, sizeof(val));
- if (rc < 0)
- return rc;
- raw = (val[0] << 16) | (val[1] << 8) | val[2];
- data->temp_raw = sign_extend32(raw, 23);
- return 0;
- }
- static int dps310_read_temp_raw(struct dps310_data *data)
- {
- int rc;
- int rate;
- int timeout;
- if (mutex_lock_interruptible(&data->lock))
- return -EINTR;
- rate = dps310_get_temp_samp_freq(data);
- timeout = DPS310_POLL_TIMEOUT_US(rate);
- /* Poll for sensor readiness; base the timeout upon the sample rate. */
- rc = dps310_ready(data, DPS310_TMP_RDY, timeout);
- if (rc)
- goto done;
- rc = dps310_read_temp_ready(data);
- done:
- mutex_unlock(&data->lock);
- return rc;
- }
- static bool dps310_is_writeable_reg(struct device *dev, unsigned int reg)
- {
- switch (reg) {
- case DPS310_PRS_CFG:
- case DPS310_TMP_CFG:
- case DPS310_MEAS_CFG:
- case DPS310_CFG_REG:
- case DPS310_RESET:
- /* No documentation available on the registers below */
- case 0x0e:
- case 0x0f:
- case 0x62:
- return true;
- default:
- return false;
- }
- }
- static bool dps310_is_volatile_reg(struct device *dev, unsigned int reg)
- {
- switch (reg) {
- case DPS310_PRS_B0:
- case DPS310_PRS_B1:
- case DPS310_PRS_B2:
- case DPS310_TMP_B0:
- case DPS310_TMP_B1:
- case DPS310_TMP_B2:
- case DPS310_MEAS_CFG:
- case 0x32: /* No documentation available on this register */
- return true;
- default:
- return false;
- }
- }
- static int dps310_write_raw(struct iio_dev *iio,
- struct iio_chan_spec const *chan, int val,
- int val2, long mask)
- {
- int rc;
- struct dps310_data *data = iio_priv(iio);
- if (mutex_lock_interruptible(&data->lock))
- return -EINTR;
- switch (mask) {
- case IIO_CHAN_INFO_SAMP_FREQ:
- switch (chan->type) {
- case IIO_PRESSURE:
- rc = dps310_set_pres_samp_freq(data, val);
- break;
- case IIO_TEMP:
- rc = dps310_set_temp_samp_freq(data, val);
- break;
- default:
- rc = -EINVAL;
- break;
- }
- break;
- case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
- switch (chan->type) {
- case IIO_PRESSURE:
- rc = dps310_set_pres_precision(data, val);
- break;
- case IIO_TEMP:
- rc = dps310_set_temp_precision(data, val);
- break;
- default:
- rc = -EINVAL;
- break;
- }
- break;
- default:
- rc = -EINVAL;
- break;
- }
- mutex_unlock(&data->lock);
- return rc;
- }
- static int dps310_calculate_pressure(struct dps310_data *data)
- {
- int i;
- int rc;
- int t_ready;
- int kpi = dps310_get_pres_k(data);
- int kti = dps310_get_temp_k(data);
- s64 rem = 0ULL;
- s64 pressure = 0ULL;
- s64 p;
- s64 t;
- s64 denoms[7];
- s64 nums[7];
- s64 rems[7];
- s64 kp;
- s64 kt;
- if (kpi < 0)
- return kpi;
- if (kti < 0)
- return kti;
- kp = (s64)kpi;
- kt = (s64)kti;
- /* Refresh temp if it's ready, otherwise just use the latest value */
- if (mutex_trylock(&data->lock)) {
- rc = regmap_read(data->regmap, DPS310_MEAS_CFG, &t_ready);
- if (rc >= 0 && t_ready & DPS310_TMP_RDY)
- dps310_read_temp_ready(data);
- mutex_unlock(&data->lock);
- }
- p = (s64)data->pressure_raw;
- t = (s64)data->temp_raw;
- /* Section 4.9.1 of the DPS310 spec; algebra'd to avoid underflow */
- nums[0] = (s64)data->c00;
- denoms[0] = 1LL;
- nums[1] = p * (s64)data->c10;
- denoms[1] = kp;
- nums[2] = p * p * (s64)data->c20;
- denoms[2] = kp * kp;
- nums[3] = p * p * p * (s64)data->c30;
- denoms[3] = kp * kp * kp;
- nums[4] = t * (s64)data->c01;
- denoms[4] = kt;
- nums[5] = t * p * (s64)data->c11;
- denoms[5] = kp * kt;
- nums[6] = t * p * p * (s64)data->c21;
- denoms[6] = kp * kp * kt;
- /* Kernel lacks a div64_s64_rem function; denoms are all positive */
- for (i = 0; i < 7; ++i) {
- u64 irem;
- if (nums[i] < 0LL) {
- pressure -= div64_u64_rem(-nums[i], denoms[i], &irem);
- rems[i] = -irem;
- } else {
- pressure += div64_u64_rem(nums[i], denoms[i], &irem);
- rems[i] = (s64)irem;
- }
- }
- /* Increase precision and calculate the remainder sum */
- for (i = 0; i < 7; ++i)
- rem += div64_s64((s64)rems[i] * 1000000000LL, denoms[i]);
- pressure += div_s64(rem, 1000000000LL);
- if (pressure < 0LL)
- return -ERANGE;
- return (int)min_t(s64, pressure, INT_MAX);
- }
- static int dps310_read_pressure(struct dps310_data *data, int *val, int *val2,
- long mask)
- {
- int rc;
- switch (mask) {
- case IIO_CHAN_INFO_SAMP_FREQ:
- rc = dps310_get_pres_samp_freq(data);
- if (rc < 0)
- return rc;
- *val = rc;
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_PROCESSED:
- rc = dps310_read_pres_raw(data);
- if (rc)
- return rc;
- rc = dps310_calculate_pressure(data);
- if (rc < 0)
- return rc;
- *val = rc;
- *val2 = 1000; /* Convert Pa to KPa per IIO ABI */
- return IIO_VAL_FRACTIONAL;
- case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
- rc = dps310_get_pres_precision(data);
- if (rc < 0)
- return rc;
- *val = rc;
- return IIO_VAL_INT;
- default:
- return -EINVAL;
- }
- }
- static int dps310_calculate_temp(struct dps310_data *data)
- {
- s64 c0;
- s64 t;
- int kt = dps310_get_temp_k(data);
- if (kt < 0)
- return kt;
- /* Obtain inverse-scaled offset */
- c0 = div_s64((s64)kt * (s64)data->c0, 2);
- /* Add the offset to the unscaled temperature */
- t = c0 + ((s64)data->temp_raw * (s64)data->c1);
- /* Convert to milliCelsius and scale the temperature */
- return (int)div_s64(t * 1000LL, kt);
- }
- static int dps310_read_temp(struct dps310_data *data, int *val, int *val2,
- long mask)
- {
- int rc;
- switch (mask) {
- case IIO_CHAN_INFO_SAMP_FREQ:
- rc = dps310_get_temp_samp_freq(data);
- if (rc < 0)
- return rc;
- *val = rc;
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_PROCESSED:
- rc = dps310_read_temp_raw(data);
- if (rc)
- return rc;
- rc = dps310_calculate_temp(data);
- if (rc < 0)
- return rc;
- *val = rc;
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
- rc = dps310_get_temp_precision(data);
- if (rc < 0)
- return rc;
- *val = rc;
- return IIO_VAL_INT;
- default:
- return -EINVAL;
- }
- }
- static int dps310_read_raw(struct iio_dev *iio,
- struct iio_chan_spec const *chan,
- int *val, int *val2, long mask)
- {
- struct dps310_data *data = iio_priv(iio);
- switch (chan->type) {
- case IIO_PRESSURE:
- return dps310_read_pressure(data, val, val2, mask);
- case IIO_TEMP:
- return dps310_read_temp(data, val, val2, mask);
- default:
- return -EINVAL;
- }
- }
- static void dps310_reset(void *action_data)
- {
- struct dps310_data *data = action_data;
- dps310_reset_wait(data);
- }
- static const struct regmap_config dps310_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
- .writeable_reg = dps310_is_writeable_reg,
- .volatile_reg = dps310_is_volatile_reg,
- .cache_type = REGCACHE_RBTREE,
- .max_register = 0x62, /* No documentation available on this register */
- };
- static const struct iio_info dps310_info = {
- .read_raw = dps310_read_raw,
- .write_raw = dps310_write_raw,
- };
- static int dps310_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
- {
- struct dps310_data *data;
- struct iio_dev *iio;
- int rc;
- iio = devm_iio_device_alloc(&client->dev, sizeof(*data));
- if (!iio)
- return -ENOMEM;
- data = iio_priv(iio);
- data->client = client;
- mutex_init(&data->lock);
- iio->name = id->name;
- iio->channels = dps310_channels;
- iio->num_channels = ARRAY_SIZE(dps310_channels);
- iio->info = &dps310_info;
- iio->modes = INDIO_DIRECT_MODE;
- data->regmap = devm_regmap_init_i2c(client, &dps310_regmap_config);
- if (IS_ERR(data->regmap))
- return PTR_ERR(data->regmap);
- /* Register to run the device reset when the device is removed */
- rc = devm_add_action_or_reset(&client->dev, dps310_reset, data);
- if (rc)
- return rc;
- rc = dps310_startup(data);
- if (rc)
- return rc;
- rc = devm_iio_device_register(&client->dev, iio);
- if (rc)
- return rc;
- i2c_set_clientdata(client, iio);
- return 0;
- }
- static const struct i2c_device_id dps310_id[] = {
- { DPS310_DEV_NAME, 0 },
- {}
- };
- MODULE_DEVICE_TABLE(i2c, dps310_id);
- static const struct acpi_device_id dps310_acpi_match[] = {
- { "IFX3100" },
- {}
- };
- MODULE_DEVICE_TABLE(acpi, dps310_acpi_match);
- static struct i2c_driver dps310_driver = {
- .driver = {
- .name = DPS310_DEV_NAME,
- .acpi_match_table = dps310_acpi_match,
- },
- .probe = dps310_probe,
- .id_table = dps310_id,
- };
- module_i2c_driver(dps310_driver);
- MODULE_AUTHOR("Joel Stanley <[email protected]>");
- MODULE_DESCRIPTION("Infineon DPS310 pressure and temperature sensor");
- MODULE_LICENSE("GPL v2");
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