| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * STMicroelectronics pressures driver |
| * |
| * Copyright 2013 STMicroelectronics Inc. |
| * |
| * Denis Ciocca <denis.ciocca@st.com> |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/interrupt.h> |
| #include <linux/i2c.h> |
| #include <linux/irq.h> |
| #include <linux/delay.h> |
| #include <linux/iio/iio.h> |
| #include <linux/iio/sysfs.h> |
| #include <linux/iio/trigger.h> |
| #include <linux/iio/buffer.h> |
| #include <asm/unaligned.h> |
| |
| #include <linux/iio/common/st_sensors.h> |
| #include "st_pressure.h" |
| |
| /* |
| * About determining pressure scaling factors |
| * ------------------------------------------ |
| * |
| * Datasheets specify typical pressure sensitivity so that pressure is computed |
| * according to the following equation : |
| * pressure[mBar] = raw / sensitivity |
| * where : |
| * raw the 24 bits long raw sampled pressure |
| * sensitivity a scaling factor specified by the datasheet in LSB/mBar |
| * |
| * IIO ABI expects pressure to be expressed as kPascal, hence pressure should be |
| * computed according to : |
| * pressure[kPascal] = pressure[mBar] / 10 |
| * = raw / (sensitivity * 10) (1) |
| * |
| * Finally, st_press_read_raw() returns pressure scaling factor as an |
| * IIO_VAL_INT_PLUS_NANO with a zero integral part and "gain" as decimal part. |
| * Therefore, from (1), "gain" becomes : |
| * gain = 10^9 / (sensitivity * 10) |
| * = 10^8 / sensitivity |
| * |
| * About determining temperature scaling factors and offsets |
| * --------------------------------------------------------- |
| * |
| * Datasheets specify typical temperature sensitivity and offset so that |
| * temperature is computed according to the following equation : |
| * temp[Celsius] = offset[Celsius] + (raw / sensitivity) |
| * where : |
| * raw the 16 bits long raw sampled temperature |
| * offset a constant specified by the datasheet in degree Celsius |
| * (sometimes zero) |
| * sensitivity a scaling factor specified by the datasheet in LSB/Celsius |
| * |
| * IIO ABI expects temperature to be expressed as milli degree Celsius such as |
| * user space should compute temperature according to : |
| * temp[mCelsius] = temp[Celsius] * 10^3 |
| * = (offset[Celsius] + (raw / sensitivity)) * 10^3 |
| * = ((offset[Celsius] * sensitivity) + raw) * |
| * (10^3 / sensitivity) (2) |
| * |
| * IIO ABI expects user space to apply offset and scaling factors to raw samples |
| * according to : |
| * temp[mCelsius] = (OFFSET + raw) * SCALE |
| * where : |
| * OFFSET an arbitrary constant exposed by device |
| * SCALE an arbitrary scaling factor exposed by device |
| * |
| * Matching OFFSET and SCALE with members of (2) gives : |
| * OFFSET = offset[Celsius] * sensitivity (3) |
| * SCALE = 10^3 / sensitivity (4) |
| * |
| * st_press_read_raw() returns temperature scaling factor as an |
| * IIO_VAL_FRACTIONAL with a 10^3 numerator and "gain2" as denominator. |
| * Therefore, from (3), "gain2" becomes : |
| * gain2 = sensitivity |
| * |
| * When declared within channel, i.e. for a non zero specified offset, |
| * st_press_read_raw() will return the latter as an IIO_VAL_FRACTIONAL such as : |
| * numerator = OFFSET * 10^3 |
| * denominator = 10^3 |
| * giving from (4): |
| * numerator = offset[Celsius] * 10^3 * sensitivity |
| * = offset[mCelsius] * gain2 |
| */ |
| |
| #define MCELSIUS_PER_CELSIUS 1000 |
| |
| /* Default pressure sensitivity */ |
| #define ST_PRESS_LSB_PER_MBAR 4096UL |
| #define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \ |
| ST_PRESS_LSB_PER_MBAR) |
| |
| /* Default temperature sensitivity */ |
| #define ST_PRESS_LSB_PER_CELSIUS 480UL |
| #define ST_PRESS_MILLI_CELSIUS_OFFSET 42500UL |
| |
| /* FULLSCALE */ |
| #define ST_PRESS_FS_AVL_1100MB 1100 |
| #define ST_PRESS_FS_AVL_1260MB 1260 |
| |
| #define ST_PRESS_1_OUT_XL_ADDR 0x28 |
| #define ST_TEMP_1_OUT_L_ADDR 0x2b |
| |
| /* LPS001WP pressure resolution */ |
| #define ST_PRESS_LPS001WP_LSB_PER_MBAR 16UL |
| /* LPS001WP temperature resolution */ |
| #define ST_PRESS_LPS001WP_LSB_PER_CELSIUS 64UL |
| /* LPS001WP pressure gain */ |
| #define ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN \ |
| (100000000UL / ST_PRESS_LPS001WP_LSB_PER_MBAR) |
| /* LPS001WP pressure and temp L addresses */ |
| #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28 |
| #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a |
| |
| /* LPS25H pressure and temp L addresses */ |
| #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28 |
| #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b |
| |
| /* LPS22HB temperature sensitivity */ |
| #define ST_PRESS_LPS22HB_LSB_PER_CELSIUS 100UL |
| |
| static const struct iio_chan_spec st_press_1_channels[] = { |
| { |
| .type = IIO_PRESSURE, |
| .address = ST_PRESS_1_OUT_XL_ADDR, |
| .scan_index = 0, |
| .scan_type = { |
| .sign = 's', |
| .realbits = 24, |
| .storagebits = 32, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), |
| .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
| }, |
| { |
| .type = IIO_TEMP, |
| .address = ST_TEMP_1_OUT_L_ADDR, |
| .scan_index = 1, |
| .scan_type = { |
| .sign = 's', |
| .realbits = 16, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE) | |
| BIT(IIO_CHAN_INFO_OFFSET), |
| .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
| }, |
| IIO_CHAN_SOFT_TIMESTAMP(2) |
| }; |
| |
| static const struct iio_chan_spec st_press_lps001wp_channels[] = { |
| { |
| .type = IIO_PRESSURE, |
| .address = ST_PRESS_LPS001WP_OUT_L_ADDR, |
| .scan_index = 0, |
| .scan_type = { |
| .sign = 's', |
| .realbits = 16, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE), |
| }, |
| { |
| .type = IIO_TEMP, |
| .address = ST_TEMP_LPS001WP_OUT_L_ADDR, |
| .scan_index = 1, |
| .scan_type = { |
| .sign = 's', |
| .realbits = 16, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE), |
| }, |
| IIO_CHAN_SOFT_TIMESTAMP(2) |
| }; |
| |
| static const struct iio_chan_spec st_press_lps22hb_channels[] = { |
| { |
| .type = IIO_PRESSURE, |
| .address = ST_PRESS_1_OUT_XL_ADDR, |
| .scan_index = 0, |
| .scan_type = { |
| .sign = 's', |
| .realbits = 24, |
| .storagebits = 32, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE), |
| .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
| }, |
| { |
| .type = IIO_TEMP, |
| .address = ST_TEMP_1_OUT_L_ADDR, |
| .scan_index = 1, |
| .scan_type = { |
| .sign = 's', |
| .realbits = 16, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE), |
| .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
| }, |
| IIO_CHAN_SOFT_TIMESTAMP(2) |
| }; |
| |
| static const struct st_sensor_settings st_press_sensors_settings[] = { |
| { |
| /* |
| * CUSTOM VALUES FOR LPS331AP SENSOR |
| * See LPS331AP datasheet: |
| * http://www2.st.com/resource/en/datasheet/lps331ap.pdf |
| */ |
| .wai = 0xbb, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS331AP_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_1_channels, |
| .num_ch = ARRAY_SIZE(st_press_1_channels), |
| .odr = { |
| .addr = 0x20, |
| .mask = 0x70, |
| .odr_avl = { |
| { .hz = 1, .value = 0x01 }, |
| { .hz = 7, .value = 0x05 }, |
| { .hz = 13, .value = 0x06 }, |
| { .hz = 25, .value = 0x07 }, |
| }, |
| }, |
| .pw = { |
| .addr = 0x20, |
| .mask = 0x80, |
| .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .addr = 0x23, |
| .mask = 0x30, |
| .fs_avl = { |
| /* |
| * Pressure and temperature sensitivity values |
| * as defined in table 3 of LPS331AP datasheet. |
| */ |
| [0] = { |
| .num = ST_PRESS_FS_AVL_1260MB, |
| .gain = ST_PRESS_KPASCAL_NANO_SCALE, |
| .gain2 = ST_PRESS_LSB_PER_CELSIUS, |
| }, |
| }, |
| }, |
| .bdu = { |
| .addr = 0x20, |
| .mask = 0x04, |
| }, |
| .drdy_irq = { |
| .int1 = { |
| .addr = 0x22, |
| .mask = 0x04, |
| .addr_od = 0x22, |
| .mask_od = 0x40, |
| }, |
| .int2 = { |
| .addr = 0x22, |
| .mask = 0x20, |
| .addr_od = 0x22, |
| .mask_od = 0x40, |
| }, |
| .addr_ihl = 0x22, |
| .mask_ihl = 0x80, |
| .stat_drdy = { |
| .addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
| .mask = 0x03, |
| }, |
| }, |
| .sim = { |
| .addr = 0x20, |
| .value = BIT(0), |
| }, |
| .multi_read_bit = true, |
| .bootime = 2, |
| }, |
| { |
| /* |
| * CUSTOM VALUES FOR LPS001WP SENSOR |
| */ |
| .wai = 0xba, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS001WP_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_lps001wp_channels, |
| .num_ch = ARRAY_SIZE(st_press_lps001wp_channels), |
| .odr = { |
| .addr = 0x20, |
| .mask = 0x30, |
| .odr_avl = { |
| { .hz = 1, .value = 0x01 }, |
| { .hz = 7, .value = 0x02 }, |
| { .hz = 13, .value = 0x03 }, |
| }, |
| }, |
| .pw = { |
| .addr = 0x20, |
| .mask = 0x40, |
| .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .fs_avl = { |
| /* |
| * Pressure and temperature resolution values |
| * as defined in table 3 of LPS001WP datasheet. |
| */ |
| [0] = { |
| .num = ST_PRESS_FS_AVL_1100MB, |
| .gain = ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN, |
| .gain2 = ST_PRESS_LPS001WP_LSB_PER_CELSIUS, |
| }, |
| }, |
| }, |
| .bdu = { |
| .addr = 0x20, |
| .mask = 0x04, |
| }, |
| .sim = { |
| .addr = 0x20, |
| .value = BIT(0), |
| }, |
| .multi_read_bit = true, |
| .bootime = 2, |
| }, |
| { |
| /* |
| * CUSTOM VALUES FOR LPS25H SENSOR |
| * See LPS25H datasheet: |
| * http://www2.st.com/resource/en/datasheet/lps25h.pdf |
| */ |
| .wai = 0xbd, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS25H_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_1_channels, |
| .num_ch = ARRAY_SIZE(st_press_1_channels), |
| .odr = { |
| .addr = 0x20, |
| .mask = 0x70, |
| .odr_avl = { |
| { .hz = 1, .value = 0x01 }, |
| { .hz = 7, .value = 0x02 }, |
| { .hz = 13, .value = 0x03 }, |
| { .hz = 25, .value = 0x04 }, |
| }, |
| }, |
| .pw = { |
| .addr = 0x20, |
| .mask = 0x80, |
| .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .fs_avl = { |
| /* |
| * Pressure and temperature sensitivity values |
| * as defined in table 3 of LPS25H datasheet. |
| */ |
| [0] = { |
| .num = ST_PRESS_FS_AVL_1260MB, |
| .gain = ST_PRESS_KPASCAL_NANO_SCALE, |
| .gain2 = ST_PRESS_LSB_PER_CELSIUS, |
| }, |
| }, |
| }, |
| .bdu = { |
| .addr = 0x20, |
| .mask = 0x04, |
| }, |
| .drdy_irq = { |
| .int1 = { |
| .addr = 0x23, |
| .mask = 0x01, |
| .addr_od = 0x22, |
| .mask_od = 0x40, |
| }, |
| .addr_ihl = 0x22, |
| .mask_ihl = 0x80, |
| .stat_drdy = { |
| .addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
| .mask = 0x03, |
| }, |
| }, |
| .sim = { |
| .addr = 0x20, |
| .value = BIT(0), |
| }, |
| .multi_read_bit = true, |
| .bootime = 2, |
| }, |
| { |
| /* |
| * CUSTOM VALUES FOR LPS22HB SENSOR |
| * See LPS22HB datasheet: |
| * http://www2.st.com/resource/en/datasheet/lps22hb.pdf |
| */ |
| .wai = 0xb1, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS22HB_PRESS_DEV_NAME, |
| [1] = LPS33HW_PRESS_DEV_NAME, |
| [2] = LPS35HW_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_lps22hb_channels, |
| .num_ch = ARRAY_SIZE(st_press_lps22hb_channels), |
| .odr = { |
| .addr = 0x10, |
| .mask = 0x70, |
| .odr_avl = { |
| { .hz = 1, .value = 0x01 }, |
| { .hz = 10, .value = 0x02 }, |
| { .hz = 25, .value = 0x03 }, |
| { .hz = 50, .value = 0x04 }, |
| { .hz = 75, .value = 0x05 }, |
| }, |
| }, |
| .pw = { |
| .addr = 0x10, |
| .mask = 0x70, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .fs_avl = { |
| /* |
| * Pressure and temperature sensitivity values |
| * as defined in table 3 of LPS22HB datasheet. |
| */ |
| [0] = { |
| .num = ST_PRESS_FS_AVL_1260MB, |
| .gain = ST_PRESS_KPASCAL_NANO_SCALE, |
| .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS, |
| }, |
| }, |
| }, |
| .bdu = { |
| .addr = 0x10, |
| .mask = 0x02, |
| }, |
| .drdy_irq = { |
| .int1 = { |
| .addr = 0x12, |
| .mask = 0x04, |
| .addr_od = 0x12, |
| .mask_od = 0x40, |
| }, |
| .addr_ihl = 0x12, |
| .mask_ihl = 0x80, |
| .stat_drdy = { |
| .addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
| .mask = 0x03, |
| }, |
| }, |
| .sim = { |
| .addr = 0x10, |
| .value = BIT(0), |
| }, |
| .multi_read_bit = false, |
| .bootime = 2, |
| }, |
| { |
| /* |
| * CUSTOM VALUES FOR LPS22HH SENSOR |
| * See LPS22HH datasheet: |
| * http://www2.st.com/resource/en/datasheet/lps22hh.pdf |
| */ |
| .wai = 0xb3, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS22HH_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_lps22hb_channels, |
| .num_ch = ARRAY_SIZE(st_press_lps22hb_channels), |
| .odr = { |
| .addr = 0x10, |
| .mask = 0x70, |
| .odr_avl = { |
| { .hz = 1, .value = 0x01 }, |
| { .hz = 10, .value = 0x02 }, |
| { .hz = 25, .value = 0x03 }, |
| { .hz = 50, .value = 0x04 }, |
| { .hz = 75, .value = 0x05 }, |
| { .hz = 100, .value = 0x06 }, |
| { .hz = 200, .value = 0x07 }, |
| }, |
| }, |
| .pw = { |
| .addr = 0x10, |
| .mask = 0x70, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .fs_avl = { |
| /* |
| * Pressure and temperature sensitivity values |
| * as defined in table 3 of LPS22HH datasheet. |
| */ |
| [0] = { |
| .num = ST_PRESS_FS_AVL_1260MB, |
| .gain = ST_PRESS_KPASCAL_NANO_SCALE, |
| .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS, |
| }, |
| }, |
| }, |
| .bdu = { |
| .addr = 0x10, |
| .mask = BIT(1), |
| }, |
| .drdy_irq = { |
| .int1 = { |
| .addr = 0x12, |
| .mask = BIT(2), |
| .addr_od = 0x11, |
| .mask_od = BIT(5), |
| }, |
| .addr_ihl = 0x11, |
| .mask_ihl = BIT(6), |
| .stat_drdy = { |
| .addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
| .mask = 0x03, |
| }, |
| }, |
| .sim = { |
| .addr = 0x10, |
| .value = BIT(0), |
| }, |
| .multi_read_bit = false, |
| .bootime = 2, |
| }, |
| }; |
| |
| static int st_press_write_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *ch, |
| int val, |
| int val2, |
| long mask) |
| { |
| int err; |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| if (val2) |
| return -EINVAL; |
| mutex_lock(&indio_dev->mlock); |
| err = st_sensors_set_odr(indio_dev, val); |
| mutex_unlock(&indio_dev->mlock); |
| return err; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int st_press_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *ch, int *val, |
| int *val2, long mask) |
| { |
| int err; |
| struct st_sensor_data *press_data = iio_priv(indio_dev); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_RAW: |
| err = st_sensors_read_info_raw(indio_dev, ch, val); |
| if (err < 0) |
| goto read_error; |
| |
| return IIO_VAL_INT; |
| case IIO_CHAN_INFO_SCALE: |
| switch (ch->type) { |
| case IIO_PRESSURE: |
| *val = 0; |
| *val2 = press_data->current_fullscale->gain; |
| return IIO_VAL_INT_PLUS_NANO; |
| case IIO_TEMP: |
| *val = MCELSIUS_PER_CELSIUS; |
| *val2 = press_data->current_fullscale->gain2; |
| return IIO_VAL_FRACTIONAL; |
| default: |
| err = -EINVAL; |
| goto read_error; |
| } |
| |
| case IIO_CHAN_INFO_OFFSET: |
| switch (ch->type) { |
| case IIO_TEMP: |
| *val = ST_PRESS_MILLI_CELSIUS_OFFSET * |
| press_data->current_fullscale->gain2; |
| *val2 = MCELSIUS_PER_CELSIUS; |
| break; |
| default: |
| err = -EINVAL; |
| goto read_error; |
| } |
| |
| return IIO_VAL_FRACTIONAL; |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| *val = press_data->odr; |
| return IIO_VAL_INT; |
| default: |
| return -EINVAL; |
| } |
| |
| read_error: |
| return err; |
| } |
| |
| static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); |
| |
| static struct attribute *st_press_attributes[] = { |
| &iio_dev_attr_sampling_frequency_available.dev_attr.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group st_press_attribute_group = { |
| .attrs = st_press_attributes, |
| }; |
| |
| static const struct iio_info press_info = { |
| .attrs = &st_press_attribute_group, |
| .read_raw = &st_press_read_raw, |
| .write_raw = &st_press_write_raw, |
| .debugfs_reg_access = &st_sensors_debugfs_reg_access, |
| }; |
| |
| #ifdef CONFIG_IIO_TRIGGER |
| static const struct iio_trigger_ops st_press_trigger_ops = { |
| .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE, |
| .validate_device = st_sensors_validate_device, |
| }; |
| #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops) |
| #else |
| #define ST_PRESS_TRIGGER_OPS NULL |
| #endif |
| |
| /* |
| * st_press_get_settings() - get sensor settings from device name |
| * @name: device name buffer reference. |
| * |
| * Return: valid reference on success, NULL otherwise. |
| */ |
| const struct st_sensor_settings *st_press_get_settings(const char *name) |
| { |
| int index = st_sensors_get_settings_index(name, |
| st_press_sensors_settings, |
| ARRAY_SIZE(st_press_sensors_settings)); |
| if (index < 0) |
| return NULL; |
| |
| return &st_press_sensors_settings[index]; |
| } |
| EXPORT_SYMBOL(st_press_get_settings); |
| |
| int st_press_common_probe(struct iio_dev *indio_dev) |
| { |
| struct st_sensor_data *press_data = iio_priv(indio_dev); |
| struct st_sensors_platform_data *pdata = dev_get_platdata(press_data->dev); |
| int err; |
| |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| indio_dev->info = &press_info; |
| |
| err = st_sensors_power_enable(indio_dev); |
| if (err) |
| return err; |
| |
| err = st_sensors_verify_id(indio_dev); |
| if (err < 0) |
| goto st_press_power_off; |
| |
| /* |
| * Skip timestamping channel while declaring available channels to |
| * common st_sensor layer. Look at st_sensors_get_buffer_element() to |
| * see how timestamps are explicitly pushed as last samples block |
| * element. |
| */ |
| press_data->num_data_channels = press_data->sensor_settings->num_ch - 1; |
| indio_dev->channels = press_data->sensor_settings->ch; |
| indio_dev->num_channels = press_data->sensor_settings->num_ch; |
| |
| press_data->current_fullscale = &press_data->sensor_settings->fs.fs_avl[0]; |
| |
| press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz; |
| |
| /* Some devices don't support a data ready pin. */ |
| if (!pdata && (press_data->sensor_settings->drdy_irq.int1.addr || |
| press_data->sensor_settings->drdy_irq.int2.addr)) |
| pdata = (struct st_sensors_platform_data *)&default_press_pdata; |
| |
| err = st_sensors_init_sensor(indio_dev, pdata); |
| if (err < 0) |
| goto st_press_power_off; |
| |
| err = st_press_allocate_ring(indio_dev); |
| if (err < 0) |
| goto st_press_power_off; |
| |
| if (press_data->irq > 0) { |
| err = st_sensors_allocate_trigger(indio_dev, |
| ST_PRESS_TRIGGER_OPS); |
| if (err < 0) |
| goto st_press_probe_trigger_error; |
| } |
| |
| err = iio_device_register(indio_dev); |
| if (err) |
| goto st_press_device_register_error; |
| |
| dev_info(&indio_dev->dev, "registered pressure sensor %s\n", |
| indio_dev->name); |
| |
| return err; |
| |
| st_press_device_register_error: |
| if (press_data->irq > 0) |
| st_sensors_deallocate_trigger(indio_dev); |
| st_press_probe_trigger_error: |
| st_press_deallocate_ring(indio_dev); |
| st_press_power_off: |
| st_sensors_power_disable(indio_dev); |
| |
| return err; |
| } |
| EXPORT_SYMBOL(st_press_common_probe); |
| |
| void st_press_common_remove(struct iio_dev *indio_dev) |
| { |
| struct st_sensor_data *press_data = iio_priv(indio_dev); |
| |
| st_sensors_power_disable(indio_dev); |
| |
| iio_device_unregister(indio_dev); |
| if (press_data->irq > 0) |
| st_sensors_deallocate_trigger(indio_dev); |
| |
| st_press_deallocate_ring(indio_dev); |
| } |
| EXPORT_SYMBOL(st_press_common_remove); |
| |
| MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); |
| MODULE_DESCRIPTION("STMicroelectronics pressures driver"); |
| MODULE_LICENSE("GPL v2"); |
