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771 lines
19 KiB
771 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* STMicroelectronics pressures driver |
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* |
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* Copyright 2013 STMicroelectronics Inc. |
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* |
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* Denis Ciocca <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/errno.h> |
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#include <linux/types.h> |
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#include <linux/interrupt.h> |
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#include <linux/i2c.h> |
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#include <linux/irq.h> |
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#include <linux/delay.h> |
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#include <linux/iio/iio.h> |
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#include <linux/iio/sysfs.h> |
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#include <linux/iio/trigger.h> |
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#include <linux/iio/buffer.h> |
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#include <asm/unaligned.h> |
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#include <linux/iio/common/st_sensors.h> |
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#include "st_pressure.h" |
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/* |
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* About determining pressure scaling factors |
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* ------------------------------------------ |
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* |
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* Datasheets specify typical pressure sensitivity so that pressure is computed |
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* according to the following equation : |
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* pressure[mBar] = raw / sensitivity |
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* where : |
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* raw the 24 bits long raw sampled pressure |
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* sensitivity a scaling factor specified by the datasheet in LSB/mBar |
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* |
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* IIO ABI expects pressure to be expressed as kPascal, hence pressure should be |
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* computed according to : |
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* pressure[kPascal] = pressure[mBar] / 10 |
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* = raw / (sensitivity * 10) (1) |
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* |
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* Finally, st_press_read_raw() returns pressure scaling factor as an |
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* IIO_VAL_INT_PLUS_NANO with a zero integral part and "gain" as decimal part. |
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* Therefore, from (1), "gain" becomes : |
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* gain = 10^9 / (sensitivity * 10) |
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* = 10^8 / sensitivity |
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* |
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* About determining temperature scaling factors and offsets |
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* --------------------------------------------------------- |
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* |
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* Datasheets specify typical temperature sensitivity and offset so that |
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* temperature is computed according to the following equation : |
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* temp[Celsius] = offset[Celsius] + (raw / sensitivity) |
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* where : |
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* raw the 16 bits long raw sampled temperature |
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* offset a constant specified by the datasheet in degree Celsius |
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* (sometimes zero) |
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* sensitivity a scaling factor specified by the datasheet in LSB/Celsius |
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* |
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* IIO ABI expects temperature to be expressed as milli degree Celsius such as |
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* user space should compute temperature according to : |
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* temp[mCelsius] = temp[Celsius] * 10^3 |
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* = (offset[Celsius] + (raw / sensitivity)) * 10^3 |
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* = ((offset[Celsius] * sensitivity) + raw) * |
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* (10^3 / sensitivity) (2) |
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* |
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* IIO ABI expects user space to apply offset and scaling factors to raw samples |
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* according to : |
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* temp[mCelsius] = (OFFSET + raw) * SCALE |
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* where : |
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* OFFSET an arbitrary constant exposed by device |
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* SCALE an arbitrary scaling factor exposed by device |
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* |
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* Matching OFFSET and SCALE with members of (2) gives : |
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* OFFSET = offset[Celsius] * sensitivity (3) |
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* SCALE = 10^3 / sensitivity (4) |
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* |
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* st_press_read_raw() returns temperature scaling factor as an |
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* IIO_VAL_FRACTIONAL with a 10^3 numerator and "gain2" as denominator. |
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* Therefore, from (3), "gain2" becomes : |
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* gain2 = sensitivity |
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* |
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* When declared within channel, i.e. for a non zero specified offset, |
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* st_press_read_raw() will return the latter as an IIO_VAL_FRACTIONAL such as : |
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* numerator = OFFSET * 10^3 |
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* denominator = 10^3 |
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* giving from (4): |
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* numerator = offset[Celsius] * 10^3 * sensitivity |
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* = offset[mCelsius] * gain2 |
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*/ |
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#define MCELSIUS_PER_CELSIUS 1000 |
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/* Default pressure sensitivity */ |
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#define ST_PRESS_LSB_PER_MBAR 4096UL |
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#define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \ |
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ST_PRESS_LSB_PER_MBAR) |
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/* Default temperature sensitivity */ |
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#define ST_PRESS_LSB_PER_CELSIUS 480UL |
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#define ST_PRESS_MILLI_CELSIUS_OFFSET 42500UL |
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/* FULLSCALE */ |
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#define ST_PRESS_FS_AVL_1100MB 1100 |
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#define ST_PRESS_FS_AVL_1260MB 1260 |
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#define ST_PRESS_1_OUT_XL_ADDR 0x28 |
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#define ST_TEMP_1_OUT_L_ADDR 0x2b |
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/* LPS001WP pressure resolution */ |
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#define ST_PRESS_LPS001WP_LSB_PER_MBAR 16UL |
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/* LPS001WP temperature resolution */ |
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#define ST_PRESS_LPS001WP_LSB_PER_CELSIUS 64UL |
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/* LPS001WP pressure gain */ |
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#define ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN \ |
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(100000000UL / ST_PRESS_LPS001WP_LSB_PER_MBAR) |
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/* LPS001WP pressure and temp L addresses */ |
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#define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28 |
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#define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a |
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/* LPS25H pressure and temp L addresses */ |
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#define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28 |
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#define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b |
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/* LPS22HB temperature sensitivity */ |
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#define ST_PRESS_LPS22HB_LSB_PER_CELSIUS 100UL |
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static const struct iio_chan_spec st_press_1_channels[] = { |
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{ |
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.type = IIO_PRESSURE, |
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.address = ST_PRESS_1_OUT_XL_ADDR, |
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.scan_index = 0, |
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.scan_type = { |
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.sign = 's', |
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.realbits = 24, |
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.storagebits = 32, |
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.endianness = IIO_LE, |
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}, |
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.info_mask_separate = |
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), |
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
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}, |
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{ |
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.type = IIO_TEMP, |
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.address = ST_TEMP_1_OUT_L_ADDR, |
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.scan_index = 1, |
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.scan_type = { |
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.sign = 's', |
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.realbits = 16, |
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.storagebits = 16, |
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.endianness = IIO_LE, |
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}, |
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.info_mask_separate = |
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BIT(IIO_CHAN_INFO_RAW) | |
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BIT(IIO_CHAN_INFO_SCALE) | |
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BIT(IIO_CHAN_INFO_OFFSET), |
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
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}, |
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IIO_CHAN_SOFT_TIMESTAMP(2) |
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}; |
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static const struct iio_chan_spec st_press_lps001wp_channels[] = { |
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{ |
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.type = IIO_PRESSURE, |
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.address = ST_PRESS_LPS001WP_OUT_L_ADDR, |
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.scan_index = 0, |
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.scan_type = { |
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.sign = 's', |
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.realbits = 16, |
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.storagebits = 16, |
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.endianness = IIO_LE, |
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}, |
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.info_mask_separate = |
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BIT(IIO_CHAN_INFO_RAW) | |
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BIT(IIO_CHAN_INFO_SCALE), |
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}, |
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{ |
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.type = IIO_TEMP, |
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.address = ST_TEMP_LPS001WP_OUT_L_ADDR, |
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.scan_index = 1, |
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.scan_type = { |
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.sign = 's', |
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.realbits = 16, |
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.storagebits = 16, |
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.endianness = IIO_LE, |
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}, |
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.info_mask_separate = |
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BIT(IIO_CHAN_INFO_RAW) | |
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BIT(IIO_CHAN_INFO_SCALE), |
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}, |
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IIO_CHAN_SOFT_TIMESTAMP(2) |
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}; |
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static const struct iio_chan_spec st_press_lps22hb_channels[] = { |
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{ |
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.type = IIO_PRESSURE, |
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.address = ST_PRESS_1_OUT_XL_ADDR, |
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.scan_index = 0, |
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.scan_type = { |
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.sign = 's', |
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.realbits = 24, |
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.storagebits = 32, |
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.endianness = IIO_LE, |
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}, |
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.info_mask_separate = |
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BIT(IIO_CHAN_INFO_RAW) | |
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BIT(IIO_CHAN_INFO_SCALE), |
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
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}, |
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{ |
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.type = IIO_TEMP, |
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.address = ST_TEMP_1_OUT_L_ADDR, |
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.scan_index = 1, |
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.scan_type = { |
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.sign = 's', |
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.realbits = 16, |
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.storagebits = 16, |
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.endianness = IIO_LE, |
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}, |
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.info_mask_separate = |
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BIT(IIO_CHAN_INFO_RAW) | |
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BIT(IIO_CHAN_INFO_SCALE), |
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
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}, |
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IIO_CHAN_SOFT_TIMESTAMP(2) |
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}; |
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static const struct st_sensor_settings st_press_sensors_settings[] = { |
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{ |
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/* |
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* CUSTOM VALUES FOR LPS331AP SENSOR |
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* See LPS331AP datasheet: |
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* http://www2.st.com/resource/en/datasheet/lps331ap.pdf |
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*/ |
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.wai = 0xbb, |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LPS331AP_PRESS_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_press_1_channels, |
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.num_ch = ARRAY_SIZE(st_press_1_channels), |
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.odr = { |
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.addr = 0x20, |
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.mask = 0x70, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x01 }, |
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{ .hz = 7, .value = 0x05 }, |
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{ .hz = 13, .value = 0x06 }, |
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{ .hz = 25, .value = 0x07 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x20, |
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.mask = 0x80, |
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.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
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}, |
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.fs = { |
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.addr = 0x23, |
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.mask = 0x30, |
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.fs_avl = { |
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/* |
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* Pressure and temperature sensitivity values |
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* as defined in table 3 of LPS331AP datasheet. |
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*/ |
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[0] = { |
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.num = ST_PRESS_FS_AVL_1260MB, |
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.gain = ST_PRESS_KPASCAL_NANO_SCALE, |
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.gain2 = ST_PRESS_LSB_PER_CELSIUS, |
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}, |
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}, |
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}, |
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.bdu = { |
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.addr = 0x20, |
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.mask = 0x04, |
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}, |
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.drdy_irq = { |
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.int1 = { |
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.addr = 0x22, |
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.mask = 0x04, |
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.addr_od = 0x22, |
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.mask_od = 0x40, |
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}, |
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.int2 = { |
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.addr = 0x22, |
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.mask = 0x20, |
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.addr_od = 0x22, |
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.mask_od = 0x40, |
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}, |
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.addr_ihl = 0x22, |
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.mask_ihl = 0x80, |
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.stat_drdy = { |
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.addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
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.mask = 0x03, |
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}, |
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}, |
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.sim = { |
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.addr = 0x20, |
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.value = BIT(0), |
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}, |
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.multi_read_bit = true, |
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.bootime = 2, |
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}, |
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{ |
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/* |
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* CUSTOM VALUES FOR LPS001WP SENSOR |
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*/ |
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.wai = 0xba, |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LPS001WP_PRESS_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_press_lps001wp_channels, |
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.num_ch = ARRAY_SIZE(st_press_lps001wp_channels), |
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.odr = { |
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.addr = 0x20, |
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.mask = 0x30, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x01 }, |
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{ .hz = 7, .value = 0x02 }, |
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{ .hz = 13, .value = 0x03 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x20, |
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.mask = 0x40, |
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.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
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}, |
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.fs = { |
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.fs_avl = { |
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/* |
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* Pressure and temperature resolution values |
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* as defined in table 3 of LPS001WP datasheet. |
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*/ |
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[0] = { |
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.num = ST_PRESS_FS_AVL_1100MB, |
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.gain = ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN, |
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.gain2 = ST_PRESS_LPS001WP_LSB_PER_CELSIUS, |
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}, |
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}, |
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}, |
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.bdu = { |
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.addr = 0x20, |
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.mask = 0x04, |
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}, |
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.sim = { |
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.addr = 0x20, |
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.value = BIT(0), |
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}, |
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.multi_read_bit = true, |
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.bootime = 2, |
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}, |
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{ |
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/* |
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* CUSTOM VALUES FOR LPS25H SENSOR |
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* See LPS25H datasheet: |
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* http://www2.st.com/resource/en/datasheet/lps25h.pdf |
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*/ |
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.wai = 0xbd, |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LPS25H_PRESS_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_press_1_channels, |
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.num_ch = ARRAY_SIZE(st_press_1_channels), |
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.odr = { |
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.addr = 0x20, |
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.mask = 0x70, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x01 }, |
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{ .hz = 7, .value = 0x02 }, |
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{ .hz = 13, .value = 0x03 }, |
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{ .hz = 25, .value = 0x04 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x20, |
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.mask = 0x80, |
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.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
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}, |
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.fs = { |
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.fs_avl = { |
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/* |
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* Pressure and temperature sensitivity values |
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* as defined in table 3 of LPS25H datasheet. |
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*/ |
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[0] = { |
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.num = ST_PRESS_FS_AVL_1260MB, |
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.gain = ST_PRESS_KPASCAL_NANO_SCALE, |
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.gain2 = ST_PRESS_LSB_PER_CELSIUS, |
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}, |
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}, |
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}, |
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.bdu = { |
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.addr = 0x20, |
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.mask = 0x04, |
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}, |
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.drdy_irq = { |
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.int1 = { |
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.addr = 0x23, |
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.mask = 0x01, |
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.addr_od = 0x22, |
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.mask_od = 0x40, |
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}, |
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.addr_ihl = 0x22, |
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.mask_ihl = 0x80, |
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.stat_drdy = { |
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.addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
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.mask = 0x03, |
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}, |
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}, |
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.sim = { |
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.addr = 0x20, |
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.value = BIT(0), |
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}, |
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.multi_read_bit = true, |
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.bootime = 2, |
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}, |
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{ |
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/* |
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* CUSTOM VALUES FOR LPS22HB SENSOR |
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* See LPS22HB datasheet: |
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* http://www2.st.com/resource/en/datasheet/lps22hb.pdf |
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*/ |
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.wai = 0xb1, |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LPS22HB_PRESS_DEV_NAME, |
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[1] = LPS33HW_PRESS_DEV_NAME, |
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[2] = LPS35HW_PRESS_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_press_lps22hb_channels, |
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.num_ch = ARRAY_SIZE(st_press_lps22hb_channels), |
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.odr = { |
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.addr = 0x10, |
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.mask = 0x70, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x01 }, |
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{ .hz = 10, .value = 0x02 }, |
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{ .hz = 25, .value = 0x03 }, |
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{ .hz = 50, .value = 0x04 }, |
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{ .hz = 75, .value = 0x05 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x10, |
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.mask = 0x70, |
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
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}, |
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.fs = { |
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.fs_avl = { |
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/* |
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* Pressure and temperature sensitivity values |
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* as defined in table 3 of LPS22HB datasheet. |
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*/ |
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[0] = { |
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.num = ST_PRESS_FS_AVL_1260MB, |
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.gain = ST_PRESS_KPASCAL_NANO_SCALE, |
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.gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS, |
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}, |
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}, |
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}, |
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.bdu = { |
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.addr = 0x10, |
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.mask = 0x02, |
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}, |
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.drdy_irq = { |
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.int1 = { |
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.addr = 0x12, |
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.mask = 0x04, |
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.addr_od = 0x12, |
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.mask_od = 0x40, |
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}, |
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.addr_ihl = 0x12, |
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.mask_ihl = 0x80, |
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.stat_drdy = { |
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.addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
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.mask = 0x03, |
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}, |
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}, |
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.sim = { |
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.addr = 0x10, |
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.value = BIT(0), |
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}, |
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.multi_read_bit = false, |
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.bootime = 2, |
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}, |
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{ |
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/* |
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* CUSTOM VALUES FOR LPS22HH SENSOR |
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* See LPS22HH datasheet: |
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* http://www2.st.com/resource/en/datasheet/lps22hh.pdf |
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*/ |
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.wai = 0xb3, |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LPS22HH_PRESS_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_press_lps22hb_channels, |
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.num_ch = ARRAY_SIZE(st_press_lps22hb_channels), |
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.odr = { |
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.addr = 0x10, |
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.mask = 0x70, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x01 }, |
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{ .hz = 10, .value = 0x02 }, |
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{ .hz = 25, .value = 0x03 }, |
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{ .hz = 50, .value = 0x04 }, |
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{ .hz = 75, .value = 0x05 }, |
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{ .hz = 100, .value = 0x06 }, |
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{ .hz = 200, .value = 0x07 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x10, |
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.mask = 0x70, |
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.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
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}, |
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.fs = { |
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.fs_avl = { |
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/* |
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* Pressure and temperature sensitivity values |
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* as defined in table 3 of LPS22HH datasheet. |
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*/ |
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[0] = { |
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.num = ST_PRESS_FS_AVL_1260MB, |
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.gain = ST_PRESS_KPASCAL_NANO_SCALE, |
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.gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS, |
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}, |
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}, |
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}, |
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.bdu = { |
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.addr = 0x10, |
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.mask = BIT(1), |
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}, |
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.drdy_irq = { |
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.int1 = { |
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.addr = 0x12, |
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.mask = BIT(2), |
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.addr_od = 0x11, |
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.mask_od = BIT(5), |
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}, |
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.addr_ihl = 0x11, |
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.mask_ihl = BIT(6), |
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.stat_drdy = { |
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.addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
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.mask = 0x03, |
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}, |
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}, |
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.sim = { |
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.addr = 0x10, |
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.value = BIT(0), |
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}, |
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.multi_read_bit = false, |
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.bootime = 2, |
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}, |
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}; |
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|
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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 <[email protected]>"); |
|
MODULE_DESCRIPTION("STMicroelectronics pressures driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|