// 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/mutex.h>
#include <linux/sysfs.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger.h>
#include <linux/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 4096 UL
#define ST_PRESS_KPASCAL_NANO_SCALE (100000000 UL / \
ST_PRESS_LSB_PER_MBAR)
/* Default temperature sensitivity */
#define ST_PRESS_LSB_PER_CELSIUS 480 UL
#define ST_PRESS_MILLI_CELSIUS_OFFSET 42500 UL
/* FULLSCALE */
#define ST_PRESS_FS_AVL_1100MB 1100
#define ST_PRESS_FS_AVL_1260MB 1260
#define ST_PRESS_1_OUT_XL_ADDR 0 x28
#define ST_TEMP_1_OUT_L_ADDR 0 x2b
/* LPS001WP pressure resolution */
#define ST_PRESS_LPS001WP_LSB_PER_MBAR 16 UL
/* LPS001WP temperature resolution */
#define ST_PRESS_LPS001WP_LSB_PER_CELSIUS 64 UL
/* LPS001WP pressure gain */
#define ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN \
(100000000 UL / ST_PRESS_LPS001WP_LSB_PER_MBAR)
/* LPS001WP pressure and temp L addresses */
#define ST_PRESS_LPS001WP_OUT_L_ADDR 0 x28
#define ST_TEMP_LPS001WP_OUT_L_ADDR 0 x2a
/* LPS25H pressure and temp L addresses */
#define ST_PRESS_LPS25H_OUT_XL_ADDR 0 x28
#define ST_TEMP_LPS25H_OUT_L_ADDR 0 x2b
/* LPS22HB temperature sensitivity */
#define ST_PRESS_LPS22HB_LSB_PER_CELSIUS 100 UL
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 = 0 xbb,
.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 = 0 x20,
.mask = 0 x70,
.odr_avl = {
{ .hz = 1 , .value = 0 x01 },
{ .hz = 7 , .value = 0 x05 },
{ .hz = 13 , .value = 0 x06 },
{ .hz = 25 , .value = 0 x07 },
},
},
.pw = {
.addr = 0 x20,
.mask = 0 x80,
.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
},
.fs = {
.addr = 0 x23,
.mask = 0 x30,
.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 = 0 x20,
.mask = 0 x04,
},
.drdy_irq = {
.int1 = {
.addr = 0 x22,
.mask = 0 x04,
.addr_od = 0 x22,
.mask_od = 0 x40,
},
.int2 = {
.addr = 0 x22,
.mask = 0 x20,
.addr_od = 0 x22,
.mask_od = 0 x40,
},
.addr_ihl = 0 x22,
.mask_ihl = 0 x80,
.stat_drdy = {
.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
.mask = 0 x03,
},
},
.sim = {
.addr = 0 x20,
.value = BIT(0 ),
},
.multi_read_bit = true ,
.bootime = 2 ,
},
{
/*
* CUSTOM VALUES FOR LPS001WP SENSOR
*/
.wai = 0 xba,
.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 = 0 x20,
.mask = 0 x30,
.odr_avl = {
{ .hz = 1 , .value = 0 x01 },
{ .hz = 7 , .value = 0 x02 },
{ .hz = 13 , .value = 0 x03 },
},
},
.pw = {
.addr = 0 x20,
.mask = 0 x40,
.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 = 0 x20,
.mask = 0 x04,
},
.sim = {
.addr = 0 x20,
.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 = 0 xbd,
.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 = 0 x20,
.mask = 0 x70,
.odr_avl = {
{ .hz = 1 , .value = 0 x01 },
{ .hz = 7 , .value = 0 x02 },
{ .hz = 13 , .value = 0 x03 },
{ .hz = 25 , .value = 0 x04 },
},
},
.pw = {
.addr = 0 x20,
.mask = 0 x80,
.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 = 0 x20,
.mask = 0 x04,
},
.drdy_irq = {
.int1 = {
.addr = 0 x23,
.mask = 0 x01,
.addr_od = 0 x22,
.mask_od = 0 x40,
},
.addr_ihl = 0 x22,
.mask_ihl = 0 x80,
.stat_drdy = {
.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
.mask = 0 x03,
},
},
.sim = {
.addr = 0 x20,
.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 = 0 xb1,
.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 = 0 x10,
.mask = 0 x70,
.odr_avl = {
{ .hz = 1 , .value = 0 x01 },
{ .hz = 10 , .value = 0 x02 },
{ .hz = 25 , .value = 0 x03 },
{ .hz = 50 , .value = 0 x04 },
{ .hz = 75 , .value = 0 x05 },
},
},
.pw = {
.addr = 0 x10,
.mask = 0 x70,
.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 = 0 x10,
.mask = 0 x02,
},
.drdy_irq = {
.int1 = {
.addr = 0 x12,
.mask = 0 x04,
.addr_od = 0 x12,
.mask_od = 0 x40,
},
.addr_ihl = 0 x12,
.mask_ihl = 0 x80,
.stat_drdy = {
.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
.mask = 0 x03,
},
},
.sim = {
.addr = 0 x10,
.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 = 0 xb3,
.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 = 0 x10,
.mask = 0 x70,
.odr_avl = {
{ .hz = 1 , .value = 0 x01 },
{ .hz = 10 , .value = 0 x02 },
{ .hz = 25 , .value = 0 x03 },
{ .hz = 50 , .value = 0 x04 },
{ .hz = 75 , .value = 0 x05 },
{ .hz = 100 , .value = 0 x06 },
{ .hz = 200 , .value = 0 x07 },
},
},
.pw = {
.addr = 0 x10,
.mask = 0 x70,
.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 = 0 x10,
.mask = BIT(1 ),
},
.drdy_irq = {
.int1 = {
.addr = 0 x12,
.mask = BIT(2 ),
.addr_od = 0 x11,
.mask_od = BIT(5 ),
},
.addr_ihl = 0 x11,
.mask_ihl = BIT(6 ),
.stat_drdy = {
.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
.mask = 0 x03,
},
},
.sim = {
.addr = 0 x10,
.value = BIT(0 ),
},
.multi_read_bit = false ,
.bootime = 2 ,
},
{
/*
* CUSTOM VALUES FOR LPS22DF SENSOR
* See LPS22DF datasheet :
* http : //www.st.com/resource/en/datasheet/lps22df.pdf
*/
.wai = 0 xb4,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0 ] = LPS22DF_PRESS_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
.num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
.odr = {
.addr = 0 x10,
.mask = 0 x78,
.odr_avl = {
{ .hz = 1 , .value = 0 x01 },
{ .hz = 4 , .value = 0 x02 },
{ .hz = 10 , .value = 0 x03 },
{ .hz = 25 , .value = 0 x04 },
{ .hz = 50 , .value = 0 x05 },
{ .hz = 75 , .value = 0 x06 },
{ .hz = 100 , .value = 0 x07 },
{ .hz = 200 , .value = 0 x08 },
},
},
.pw = {
.addr = 0 x10,
.mask = 0 x78,
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
},
.fs = {
.fs_avl = {
/*
* Pressure and temperature sensitivity values
* as defined in table 2 of LPS22DF datasheet .
*/
[0 ] = {
.num = ST_PRESS_FS_AVL_1260MB,
.gain = ST_PRESS_KPASCAL_NANO_SCALE,
.gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
},
},
},
.bdu = {
.addr = 0 x11,
.mask = BIT(3 ),
},
.drdy_irq = {
.int1 = {
.addr = 0 x13,
.mask = BIT(5 ),
.addr_od = 0 x12,
.mask_od = BIT(1 ),
},
.addr_ihl = 0 x12,
.mask_ihl = BIT(3 ),
.stat_drdy = {
.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
.mask = 0 x03,
},
},
.sim = {
.addr = 0 x0E,
.value = BIT(5 ),
},
.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)
{
switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
if (val2)
return -EINVAL;
return st_sensors_set_odr(indio_dev, val);
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_NS(st_press_get_settings, "IIO_ST_SENSORS" );
int st_press_common_probe(struct iio_dev *indio_dev)
{
struct st_sensor_data *press_data = iio_priv(indio_dev);
struct device *parent = indio_dev->dev.parent;
struct st_sensors_platform_data *pdata = dev_get_platdata(parent);
int err;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &press_info;
err = st_sensors_verify_id(indio_dev);
if (err < 0 )
return err;
/*
* 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 )
return err;
err = st_press_allocate_ring(indio_dev);
if (err < 0 )
return err;
if (press_data->irq > 0 ) {
err = st_sensors_allocate_trigger(indio_dev,
ST_PRESS_TRIGGER_OPS);
if (err < 0 )
return err;
}
return devm_iio_device_register(parent, indio_dev);
}
EXPORT_SYMBOL_NS(st_press_common_probe, "IIO_ST_SENSORS" );
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>" );
MODULE_DESCRIPTION("STMicroelectronics pressures driver" );
MODULE_LICENSE("GPL v2" );
MODULE_IMPORT_NS("IIO_ST_SENSORS" );
Messung V0.5 in Prozent C=97 H=94 G=95
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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