mirror of https://gitee.com/openkylin/linux.git
473 lines
13 KiB
C
473 lines
13 KiB
C
/*
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* STMicroelectronics gyroscopes driver
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*
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* Copyright 2012-2013 STMicroelectronics Inc.
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*
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* Denis Ciocca <denis.ciocca@st.com>
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*
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* Licensed under the GPL-2.
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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/mutex.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/gpio.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 <linux/iio/common/st_sensors.h>
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#include "st_gyro.h"
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#define ST_GYRO_NUMBER_DATA_CHANNELS 3
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/* DEFAULT VALUE FOR SENSORS */
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#define ST_GYRO_DEFAULT_OUT_X_L_ADDR 0x28
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#define ST_GYRO_DEFAULT_OUT_Y_L_ADDR 0x2a
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#define ST_GYRO_DEFAULT_OUT_Z_L_ADDR 0x2c
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/* FULLSCALE */
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#define ST_GYRO_FS_AVL_250DPS 250
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#define ST_GYRO_FS_AVL_500DPS 500
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#define ST_GYRO_FS_AVL_2000DPS 2000
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/* CUSTOM VALUES FOR SENSOR 1 */
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#define ST_GYRO_1_WAI_EXP 0xd3
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#define ST_GYRO_1_ODR_ADDR 0x20
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#define ST_GYRO_1_ODR_MASK 0xc0
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#define ST_GYRO_1_ODR_AVL_100HZ_VAL 0x00
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#define ST_GYRO_1_ODR_AVL_200HZ_VAL 0x01
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#define ST_GYRO_1_ODR_AVL_400HZ_VAL 0x02
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#define ST_GYRO_1_ODR_AVL_800HZ_VAL 0x03
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#define ST_GYRO_1_PW_ADDR 0x20
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#define ST_GYRO_1_PW_MASK 0x08
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#define ST_GYRO_1_FS_ADDR 0x23
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#define ST_GYRO_1_FS_MASK 0x30
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#define ST_GYRO_1_FS_AVL_250_VAL 0x00
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#define ST_GYRO_1_FS_AVL_500_VAL 0x01
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#define ST_GYRO_1_FS_AVL_2000_VAL 0x02
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#define ST_GYRO_1_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
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#define ST_GYRO_1_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
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#define ST_GYRO_1_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
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#define ST_GYRO_1_BDU_ADDR 0x23
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#define ST_GYRO_1_BDU_MASK 0x80
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#define ST_GYRO_1_DRDY_IRQ_ADDR 0x22
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#define ST_GYRO_1_DRDY_IRQ_INT2_MASK 0x08
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#define ST_GYRO_1_MULTIREAD_BIT true
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/* CUSTOM VALUES FOR SENSOR 2 */
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#define ST_GYRO_2_WAI_EXP 0xd4
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#define ST_GYRO_2_ODR_ADDR 0x20
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#define ST_GYRO_2_ODR_MASK 0xc0
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#define ST_GYRO_2_ODR_AVL_95HZ_VAL 0x00
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#define ST_GYRO_2_ODR_AVL_190HZ_VAL 0x01
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#define ST_GYRO_2_ODR_AVL_380HZ_VAL 0x02
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#define ST_GYRO_2_ODR_AVL_760HZ_VAL 0x03
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#define ST_GYRO_2_PW_ADDR 0x20
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#define ST_GYRO_2_PW_MASK 0x08
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#define ST_GYRO_2_FS_ADDR 0x23
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#define ST_GYRO_2_FS_MASK 0x30
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#define ST_GYRO_2_FS_AVL_250_VAL 0x00
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#define ST_GYRO_2_FS_AVL_500_VAL 0x01
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#define ST_GYRO_2_FS_AVL_2000_VAL 0x02
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#define ST_GYRO_2_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
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#define ST_GYRO_2_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
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#define ST_GYRO_2_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
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#define ST_GYRO_2_BDU_ADDR 0x23
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#define ST_GYRO_2_BDU_MASK 0x80
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#define ST_GYRO_2_DRDY_IRQ_ADDR 0x22
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#define ST_GYRO_2_DRDY_IRQ_INT2_MASK 0x08
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#define ST_GYRO_2_MULTIREAD_BIT true
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/* CUSTOM VALUES FOR SENSOR 3 */
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#define ST_GYRO_3_WAI_EXP 0xd7
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#define ST_GYRO_3_ODR_ADDR 0x20
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#define ST_GYRO_3_ODR_MASK 0xc0
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#define ST_GYRO_3_ODR_AVL_95HZ_VAL 0x00
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#define ST_GYRO_3_ODR_AVL_190HZ_VAL 0x01
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#define ST_GYRO_3_ODR_AVL_380HZ_VAL 0x02
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#define ST_GYRO_3_ODR_AVL_760HZ_VAL 0x03
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#define ST_GYRO_3_PW_ADDR 0x20
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#define ST_GYRO_3_PW_MASK 0x08
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#define ST_GYRO_3_FS_ADDR 0x23
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#define ST_GYRO_3_FS_MASK 0x30
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#define ST_GYRO_3_FS_AVL_250_VAL 0x00
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#define ST_GYRO_3_FS_AVL_500_VAL 0x01
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#define ST_GYRO_3_FS_AVL_2000_VAL 0x02
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#define ST_GYRO_3_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
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#define ST_GYRO_3_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
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#define ST_GYRO_3_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
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#define ST_GYRO_3_BDU_ADDR 0x23
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#define ST_GYRO_3_BDU_MASK 0x80
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#define ST_GYRO_3_DRDY_IRQ_ADDR 0x22
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#define ST_GYRO_3_DRDY_IRQ_INT2_MASK 0x08
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#define ST_GYRO_3_MULTIREAD_BIT true
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static const struct iio_chan_spec st_gyro_16bit_channels[] = {
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ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
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ST_GYRO_DEFAULT_OUT_X_L_ADDR),
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ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
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ST_GYRO_DEFAULT_OUT_Y_L_ADDR),
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ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL,
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
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ST_GYRO_DEFAULT_OUT_Z_L_ADDR),
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IIO_CHAN_SOFT_TIMESTAMP(3)
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};
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static const struct st_sensor_settings st_gyro_sensors_settings[] = {
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{
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.wai = ST_GYRO_1_WAI_EXP,
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.sensors_supported = {
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[0] = L3G4200D_GYRO_DEV_NAME,
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[1] = LSM330DL_GYRO_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
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.odr = {
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.addr = ST_GYRO_1_ODR_ADDR,
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.mask = ST_GYRO_1_ODR_MASK,
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.odr_avl = {
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{ 100, ST_GYRO_1_ODR_AVL_100HZ_VAL, },
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{ 200, ST_GYRO_1_ODR_AVL_200HZ_VAL, },
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{ 400, ST_GYRO_1_ODR_AVL_400HZ_VAL, },
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{ 800, ST_GYRO_1_ODR_AVL_800HZ_VAL, },
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},
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},
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.pw = {
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.addr = ST_GYRO_1_PW_ADDR,
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.mask = ST_GYRO_1_PW_MASK,
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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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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = ST_GYRO_1_FS_ADDR,
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.mask = ST_GYRO_1_FS_MASK,
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.fs_avl = {
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[0] = {
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.num = ST_GYRO_FS_AVL_250DPS,
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.value = ST_GYRO_1_FS_AVL_250_VAL,
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.gain = ST_GYRO_1_FS_AVL_250_GAIN,
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},
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[1] = {
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.num = ST_GYRO_FS_AVL_500DPS,
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.value = ST_GYRO_1_FS_AVL_500_VAL,
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.gain = ST_GYRO_1_FS_AVL_500_GAIN,
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},
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[2] = {
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.num = ST_GYRO_FS_AVL_2000DPS,
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.value = ST_GYRO_1_FS_AVL_2000_VAL,
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.gain = ST_GYRO_1_FS_AVL_2000_GAIN,
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},
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},
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},
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.bdu = {
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.addr = ST_GYRO_1_BDU_ADDR,
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.mask = ST_GYRO_1_BDU_MASK,
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},
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.drdy_irq = {
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.addr = ST_GYRO_1_DRDY_IRQ_ADDR,
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.mask_int2 = ST_GYRO_1_DRDY_IRQ_INT2_MASK,
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},
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.multi_read_bit = ST_GYRO_1_MULTIREAD_BIT,
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.bootime = 2,
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},
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{
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.wai = ST_GYRO_2_WAI_EXP,
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.sensors_supported = {
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[0] = L3GD20_GYRO_DEV_NAME,
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[1] = LSM330D_GYRO_DEV_NAME,
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[2] = LSM330DLC_GYRO_DEV_NAME,
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[3] = L3G4IS_GYRO_DEV_NAME,
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[4] = LSM330_GYRO_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
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.odr = {
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.addr = ST_GYRO_2_ODR_ADDR,
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.mask = ST_GYRO_2_ODR_MASK,
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.odr_avl = {
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{ 95, ST_GYRO_2_ODR_AVL_95HZ_VAL, },
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{ 190, ST_GYRO_2_ODR_AVL_190HZ_VAL, },
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{ 380, ST_GYRO_2_ODR_AVL_380HZ_VAL, },
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{ 760, ST_GYRO_2_ODR_AVL_760HZ_VAL, },
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},
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},
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.pw = {
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.addr = ST_GYRO_2_PW_ADDR,
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.mask = ST_GYRO_2_PW_MASK,
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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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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = ST_GYRO_2_FS_ADDR,
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.mask = ST_GYRO_2_FS_MASK,
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.fs_avl = {
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[0] = {
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.num = ST_GYRO_FS_AVL_250DPS,
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.value = ST_GYRO_2_FS_AVL_250_VAL,
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.gain = ST_GYRO_2_FS_AVL_250_GAIN,
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},
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[1] = {
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.num = ST_GYRO_FS_AVL_500DPS,
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.value = ST_GYRO_2_FS_AVL_500_VAL,
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.gain = ST_GYRO_2_FS_AVL_500_GAIN,
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},
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[2] = {
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.num = ST_GYRO_FS_AVL_2000DPS,
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.value = ST_GYRO_2_FS_AVL_2000_VAL,
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.gain = ST_GYRO_2_FS_AVL_2000_GAIN,
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},
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},
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},
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.bdu = {
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.addr = ST_GYRO_2_BDU_ADDR,
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.mask = ST_GYRO_2_BDU_MASK,
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},
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.drdy_irq = {
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.addr = ST_GYRO_2_DRDY_IRQ_ADDR,
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.mask_int2 = ST_GYRO_2_DRDY_IRQ_INT2_MASK,
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},
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.multi_read_bit = ST_GYRO_2_MULTIREAD_BIT,
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.bootime = 2,
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},
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{
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.wai = ST_GYRO_3_WAI_EXP,
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.sensors_supported = {
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[0] = L3GD20_GYRO_DEV_NAME,
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},
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.ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
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.odr = {
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.addr = ST_GYRO_3_ODR_ADDR,
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.mask = ST_GYRO_3_ODR_MASK,
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.odr_avl = {
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{ 95, ST_GYRO_3_ODR_AVL_95HZ_VAL, },
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{ 190, ST_GYRO_3_ODR_AVL_190HZ_VAL, },
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{ 380, ST_GYRO_3_ODR_AVL_380HZ_VAL, },
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{ 760, ST_GYRO_3_ODR_AVL_760HZ_VAL, },
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},
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},
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.pw = {
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.addr = ST_GYRO_3_PW_ADDR,
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.mask = ST_GYRO_3_PW_MASK,
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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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.enable_axis = {
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.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
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.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
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},
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.fs = {
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.addr = ST_GYRO_3_FS_ADDR,
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.mask = ST_GYRO_3_FS_MASK,
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.fs_avl = {
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[0] = {
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.num = ST_GYRO_FS_AVL_250DPS,
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.value = ST_GYRO_3_FS_AVL_250_VAL,
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.gain = ST_GYRO_3_FS_AVL_250_GAIN,
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},
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[1] = {
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.num = ST_GYRO_FS_AVL_500DPS,
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.value = ST_GYRO_3_FS_AVL_500_VAL,
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.gain = ST_GYRO_3_FS_AVL_500_GAIN,
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},
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[2] = {
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.num = ST_GYRO_FS_AVL_2000DPS,
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.value = ST_GYRO_3_FS_AVL_2000_VAL,
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.gain = ST_GYRO_3_FS_AVL_2000_GAIN,
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},
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},
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},
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.bdu = {
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.addr = ST_GYRO_3_BDU_ADDR,
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.mask = ST_GYRO_3_BDU_MASK,
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},
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.drdy_irq = {
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.addr = ST_GYRO_3_DRDY_IRQ_ADDR,
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.mask_int2 = ST_GYRO_3_DRDY_IRQ_INT2_MASK,
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},
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.multi_read_bit = ST_GYRO_3_MULTIREAD_BIT,
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.bootime = 2,
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},
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};
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static int st_gyro_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *ch, int *val,
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int *val2, long mask)
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{
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int err;
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struct st_sensor_data *gdata = iio_priv(indio_dev);
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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err = st_sensors_read_info_raw(indio_dev, ch, val);
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if (err < 0)
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goto read_error;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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*val = 0;
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*val2 = gdata->current_fullscale->gain;
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return IIO_VAL_INT_PLUS_MICRO;
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case IIO_CHAN_INFO_SAMP_FREQ:
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*val = gdata->odr;
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return IIO_VAL_INT;
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default:
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return -EINVAL;
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}
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read_error:
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return err;
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}
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static int st_gyro_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int val, int val2, long mask)
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{
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int err;
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switch (mask) {
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case IIO_CHAN_INFO_SCALE:
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err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
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break;
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case IIO_CHAN_INFO_SAMP_FREQ:
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if (val2)
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return -EINVAL;
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mutex_lock(&indio_dev->mlock);
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err = st_sensors_set_odr(indio_dev, val);
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mutex_unlock(&indio_dev->mlock);
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return err;
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default:
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err = -EINVAL;
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}
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return err;
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}
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static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
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static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_anglvel_scale_available);
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static struct attribute *st_gyro_attributes[] = {
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&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
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&iio_dev_attr_in_anglvel_scale_available.dev_attr.attr,
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NULL,
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};
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static const struct attribute_group st_gyro_attribute_group = {
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.attrs = st_gyro_attributes,
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};
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static const struct iio_info gyro_info = {
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.driver_module = THIS_MODULE,
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.attrs = &st_gyro_attribute_group,
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.read_raw = &st_gyro_read_raw,
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.write_raw = &st_gyro_write_raw,
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};
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#ifdef CONFIG_IIO_TRIGGER
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static const struct iio_trigger_ops st_gyro_trigger_ops = {
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.owner = THIS_MODULE,
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.set_trigger_state = ST_GYRO_TRIGGER_SET_STATE,
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};
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#define ST_GYRO_TRIGGER_OPS (&st_gyro_trigger_ops)
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#else
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#define ST_GYRO_TRIGGER_OPS NULL
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#endif
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int st_gyro_common_probe(struct iio_dev *indio_dev)
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{
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struct st_sensor_data *gdata = iio_priv(indio_dev);
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int irq = gdata->get_irq_data_ready(indio_dev);
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int err;
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indio_dev->modes = INDIO_DIRECT_MODE;
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indio_dev->info = &gyro_info;
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st_sensors_power_enable(indio_dev);
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err = st_sensors_check_device_support(indio_dev,
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ARRAY_SIZE(st_gyro_sensors_settings),
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st_gyro_sensors_settings);
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if (err < 0)
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return err;
|
|
|
|
gdata->num_data_channels = ST_GYRO_NUMBER_DATA_CHANNELS;
|
|
gdata->multiread_bit = gdata->sensor_settings->multi_read_bit;
|
|
indio_dev->channels = gdata->sensor_settings->ch;
|
|
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
|
|
|
|
gdata->current_fullscale = (struct st_sensor_fullscale_avl *)
|
|
&gdata->sensor_settings->fs.fs_avl[0];
|
|
gdata->odr = gdata->sensor_settings->odr.odr_avl[0].hz;
|
|
|
|
err = st_sensors_init_sensor(indio_dev,
|
|
(struct st_sensors_platform_data *)&gyro_pdata);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = st_gyro_allocate_ring(indio_dev);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (irq > 0) {
|
|
err = st_sensors_allocate_trigger(indio_dev,
|
|
ST_GYRO_TRIGGER_OPS);
|
|
if (err < 0)
|
|
goto st_gyro_probe_trigger_error;
|
|
}
|
|
|
|
err = iio_device_register(indio_dev);
|
|
if (err)
|
|
goto st_gyro_device_register_error;
|
|
|
|
dev_info(&indio_dev->dev, "registered gyroscope %s\n",
|
|
indio_dev->name);
|
|
|
|
return 0;
|
|
|
|
st_gyro_device_register_error:
|
|
if (irq > 0)
|
|
st_sensors_deallocate_trigger(indio_dev);
|
|
st_gyro_probe_trigger_error:
|
|
st_gyro_deallocate_ring(indio_dev);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(st_gyro_common_probe);
|
|
|
|
void st_gyro_common_remove(struct iio_dev *indio_dev)
|
|
{
|
|
struct st_sensor_data *gdata = iio_priv(indio_dev);
|
|
|
|
st_sensors_power_disable(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
if (gdata->get_irq_data_ready(indio_dev) > 0)
|
|
st_sensors_deallocate_trigger(indio_dev);
|
|
|
|
st_gyro_deallocate_ring(indio_dev);
|
|
}
|
|
EXPORT_SYMBOL(st_gyro_common_remove);
|
|
|
|
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
|
|
MODULE_DESCRIPTION("STMicroelectronics gyroscopes driver");
|
|
MODULE_LICENSE("GPL v2");
|