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564 lines
13 KiB
564 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* STMicroelectronics magnetometers driver |
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* |
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* Copyright 2012-2013 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/buffer.h> |
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#include <linux/iio/common/st_sensors.h> |
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#include "st_magn.h" |
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#define ST_MAGN_NUMBER_DATA_CHANNELS 3 |
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/* DEFAULT VALUE FOR SENSORS */ |
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#define ST_MAGN_DEFAULT_OUT_X_H_ADDR 0x03 |
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#define ST_MAGN_DEFAULT_OUT_Y_H_ADDR 0x07 |
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#define ST_MAGN_DEFAULT_OUT_Z_H_ADDR 0x05 |
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/* FULLSCALE */ |
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#define ST_MAGN_FS_AVL_1300MG 1300 |
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#define ST_MAGN_FS_AVL_1900MG 1900 |
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#define ST_MAGN_FS_AVL_2500MG 2500 |
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#define ST_MAGN_FS_AVL_4000MG 4000 |
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#define ST_MAGN_FS_AVL_4700MG 4700 |
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#define ST_MAGN_FS_AVL_5600MG 5600 |
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#define ST_MAGN_FS_AVL_8000MG 8000 |
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#define ST_MAGN_FS_AVL_8100MG 8100 |
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#define ST_MAGN_FS_AVL_12000MG 12000 |
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#define ST_MAGN_FS_AVL_15000MG 15000 |
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#define ST_MAGN_FS_AVL_16000MG 16000 |
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/* Special L addresses for Sensor 2 */ |
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#define ST_MAGN_2_OUT_X_L_ADDR 0x28 |
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#define ST_MAGN_2_OUT_Y_L_ADDR 0x2a |
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#define ST_MAGN_2_OUT_Z_L_ADDR 0x2c |
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/* Special L addresses for sensor 3 */ |
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#define ST_MAGN_3_OUT_X_L_ADDR 0x68 |
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#define ST_MAGN_3_OUT_Y_L_ADDR 0x6a |
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#define ST_MAGN_3_OUT_Z_L_ADDR 0x6c |
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static const struct iio_chan_spec st_magn_16bit_channels[] = { |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_BE, 16, 16, |
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ST_MAGN_DEFAULT_OUT_X_H_ADDR), |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_BE, 16, 16, |
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ST_MAGN_DEFAULT_OUT_Y_H_ADDR), |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_BE, 16, 16, |
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ST_MAGN_DEFAULT_OUT_Z_H_ADDR), |
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IIO_CHAN_SOFT_TIMESTAMP(3) |
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}; |
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static const struct iio_chan_spec st_magn_2_16bit_channels[] = { |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_MAGN_2_OUT_X_L_ADDR), |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_MAGN_2_OUT_Y_L_ADDR), |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_MAGN_2_OUT_Z_L_ADDR), |
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IIO_CHAN_SOFT_TIMESTAMP(3) |
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}; |
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static const struct iio_chan_spec st_magn_3_16bit_channels[] = { |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_MAGN_3_OUT_X_L_ADDR), |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_MAGN_3_OUT_Y_L_ADDR), |
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ST_SENSORS_LSM_CHANNELS(IIO_MAGN, |
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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_MAGN_3_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_magn_sensors_settings[] = { |
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{ |
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.wai = 0, /* This sensor has no valid WhoAmI report 0 */ |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LSM303DLH_MAGN_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_magn_16bit_channels, |
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.odr = { |
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.addr = 0x00, |
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.mask = 0x1c, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x00 }, |
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{ .hz = 2, .value = 0x01 }, |
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{ .hz = 3, .value = 0x02 }, |
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{ .hz = 8, .value = 0x03 }, |
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{ .hz = 15, .value = 0x04 }, |
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{ .hz = 30, .value = 0x05 }, |
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{ .hz = 75, .value = 0x06 }, |
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/* 220 Hz, 0x07 reportedly exist */ |
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}, |
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}, |
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.pw = { |
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.addr = 0x02, |
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.mask = 0x03, |
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.value_on = 0x00, |
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.value_off = 0x03, |
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}, |
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.fs = { |
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.addr = 0x01, |
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.mask = 0xe0, |
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.fs_avl = { |
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[0] = { |
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.num = ST_MAGN_FS_AVL_1300MG, |
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.value = 0x01, |
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.gain = 1100, |
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.gain2 = 980, |
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}, |
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[1] = { |
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.num = ST_MAGN_FS_AVL_1900MG, |
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.value = 0x02, |
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.gain = 855, |
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.gain2 = 760, |
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}, |
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[2] = { |
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.num = ST_MAGN_FS_AVL_2500MG, |
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.value = 0x03, |
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.gain = 670, |
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.gain2 = 600, |
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}, |
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[3] = { |
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.num = ST_MAGN_FS_AVL_4000MG, |
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.value = 0x04, |
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.gain = 450, |
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.gain2 = 400, |
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}, |
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[4] = { |
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.num = ST_MAGN_FS_AVL_4700MG, |
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.value = 0x05, |
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.gain = 400, |
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.gain2 = 355, |
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}, |
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[5] = { |
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.num = ST_MAGN_FS_AVL_5600MG, |
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.value = 0x06, |
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.gain = 330, |
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.gain2 = 295, |
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}, |
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[6] = { |
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.num = ST_MAGN_FS_AVL_8100MG, |
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.value = 0x07, |
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.gain = 230, |
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.gain2 = 205, |
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}, |
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}, |
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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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.wai = 0x3c, |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LSM303DLHC_MAGN_DEV_NAME, |
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[1] = LSM303DLM_MAGN_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_magn_16bit_channels, |
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.odr = { |
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.addr = 0x00, |
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.mask = 0x1c, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x00 }, |
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{ .hz = 2, .value = 0x01 }, |
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{ .hz = 3, .value = 0x02 }, |
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{ .hz = 8, .value = 0x03 }, |
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{ .hz = 15, .value = 0x04 }, |
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{ .hz = 30, .value = 0x05 }, |
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{ .hz = 75, .value = 0x06 }, |
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{ .hz = 220, .value = 0x07 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x02, |
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.mask = 0x03, |
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.value_on = 0x00, |
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.value_off = 0x03, |
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}, |
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.fs = { |
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.addr = 0x01, |
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.mask = 0xe0, |
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.fs_avl = { |
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[0] = { |
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.num = ST_MAGN_FS_AVL_1300MG, |
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.value = 0x01, |
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.gain = 909, |
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.gain2 = 1020, |
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}, |
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[1] = { |
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.num = ST_MAGN_FS_AVL_1900MG, |
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.value = 0x02, |
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.gain = 1169, |
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.gain2 = 1315, |
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}, |
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[2] = { |
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.num = ST_MAGN_FS_AVL_2500MG, |
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.value = 0x03, |
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.gain = 1492, |
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.gain2 = 1666, |
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}, |
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[3] = { |
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.num = ST_MAGN_FS_AVL_4000MG, |
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.value = 0x04, |
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.gain = 2222, |
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.gain2 = 2500, |
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}, |
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[4] = { |
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.num = ST_MAGN_FS_AVL_4700MG, |
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.value = 0x05, |
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.gain = 2500, |
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.gain2 = 2816, |
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}, |
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[5] = { |
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.num = ST_MAGN_FS_AVL_5600MG, |
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.value = 0x06, |
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.gain = 3030, |
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.gain2 = 3389, |
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}, |
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[6] = { |
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.num = ST_MAGN_FS_AVL_8100MG, |
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.value = 0x07, |
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.gain = 4347, |
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.gain2 = 4878, |
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}, |
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}, |
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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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.wai = 0x3d, |
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.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
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.sensors_supported = { |
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[0] = LIS3MDL_MAGN_DEV_NAME, |
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[1] = LSM9DS1_MAGN_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_magn_2_16bit_channels, |
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.odr = { |
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.addr = 0x20, |
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.mask = 0x1c, |
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.odr_avl = { |
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{ .hz = 1, .value = 0x00 }, |
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{ .hz = 2, .value = 0x01 }, |
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{ .hz = 3, .value = 0x02 }, |
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{ .hz = 5, .value = 0x03 }, |
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{ .hz = 10, .value = 0x04 }, |
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{ .hz = 20, .value = 0x05 }, |
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{ .hz = 40, .value = 0x06 }, |
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{ .hz = 80, .value = 0x07 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x22, |
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.mask = 0x03, |
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.value_on = 0x00, |
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.value_off = 0x03, |
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}, |
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.fs = { |
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.addr = 0x21, |
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.mask = 0x60, |
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.fs_avl = { |
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[0] = { |
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.num = ST_MAGN_FS_AVL_4000MG, |
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.value = 0x00, |
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.gain = 146, |
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}, |
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[1] = { |
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.num = ST_MAGN_FS_AVL_8000MG, |
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.value = 0x01, |
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.gain = 292, |
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}, |
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[2] = { |
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.num = ST_MAGN_FS_AVL_12000MG, |
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.value = 0x02, |
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.gain = 438, |
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}, |
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[3] = { |
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.num = ST_MAGN_FS_AVL_16000MG, |
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.value = 0x03, |
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.gain = 584, |
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}, |
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}, |
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}, |
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.bdu = { |
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.addr = 0x24, |
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.mask = 0x40, |
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}, |
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.drdy_irq = { |
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/* drdy line is routed drdy pin */ |
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.stat_drdy = { |
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.addr = ST_SENSORS_DEFAULT_STAT_ADDR, |
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.mask = 0x07, |
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}, |
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}, |
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.sim = { |
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.addr = 0x22, |
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.value = BIT(2), |
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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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.wai = 0x40, |
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.wai_addr = 0x4f, |
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.sensors_supported = { |
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[0] = LSM303AGR_MAGN_DEV_NAME, |
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[1] = LIS2MDL_MAGN_DEV_NAME, |
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}, |
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.ch = (struct iio_chan_spec *)st_magn_3_16bit_channels, |
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.odr = { |
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.addr = 0x60, |
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.mask = 0x0c, |
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.odr_avl = { |
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{ .hz = 10, .value = 0x00 }, |
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{ .hz = 20, .value = 0x01 }, |
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{ .hz = 50, .value = 0x02 }, |
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{ .hz = 100, .value = 0x03 }, |
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}, |
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}, |
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.pw = { |
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.addr = 0x60, |
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.mask = 0x03, |
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.value_on = 0x00, |
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.value_off = 0x03, |
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}, |
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.fs = { |
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.fs_avl = { |
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[0] = { |
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.num = ST_MAGN_FS_AVL_15000MG, |
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.gain = 1500, |
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}, |
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}, |
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}, |
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.bdu = { |
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.addr = 0x62, |
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.mask = 0x10, |
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}, |
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.drdy_irq = { |
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.int1 = { |
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.addr = 0x62, |
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.mask = 0x01, |
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}, |
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.stat_drdy = { |
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.addr = 0x67, |
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.mask = 0x07, |
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}, |
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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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static int st_magn_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 *mdata = 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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if ((ch->scan_index == ST_SENSORS_SCAN_Z) && |
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(mdata->current_fullscale->gain2 != 0)) |
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*val2 = mdata->current_fullscale->gain2; |
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else |
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*val2 = mdata->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 = mdata->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_magn_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_magn_scale_available); |
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static struct attribute *st_magn_attributes[] = { |
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&iio_dev_attr_sampling_frequency_available.dev_attr.attr, |
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&iio_dev_attr_in_magn_scale_available.dev_attr.attr, |
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NULL, |
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}; |
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static const struct attribute_group st_magn_attribute_group = { |
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.attrs = st_magn_attributes, |
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}; |
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static const struct iio_info magn_info = { |
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.attrs = &st_magn_attribute_group, |
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.read_raw = &st_magn_read_raw, |
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.write_raw = &st_magn_write_raw, |
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.debugfs_reg_access = &st_sensors_debugfs_reg_access, |
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}; |
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#ifdef CONFIG_IIO_TRIGGER |
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static const struct iio_trigger_ops st_magn_trigger_ops = { |
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.set_trigger_state = ST_MAGN_TRIGGER_SET_STATE, |
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.validate_device = st_sensors_validate_device, |
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}; |
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#define ST_MAGN_TRIGGER_OPS (&st_magn_trigger_ops) |
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#else |
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#define ST_MAGN_TRIGGER_OPS NULL |
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#endif |
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/* |
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* st_magn_get_settings() - get sensor settings from device name |
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* @name: device name buffer reference. |
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* |
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* Return: valid reference on success, NULL otherwise. |
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*/ |
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const struct st_sensor_settings *st_magn_get_settings(const char *name) |
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{ |
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int index = st_sensors_get_settings_index(name, |
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st_magn_sensors_settings, |
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ARRAY_SIZE(st_magn_sensors_settings)); |
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if (index < 0) |
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return NULL; |
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return &st_magn_sensors_settings[index]; |
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} |
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EXPORT_SYMBOL(st_magn_get_settings); |
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int st_magn_common_probe(struct iio_dev *indio_dev) |
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{ |
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struct st_sensor_data *mdata = iio_priv(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 = &magn_info; |
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err = st_sensors_power_enable(indio_dev); |
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if (err) |
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return err; |
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err = st_sensors_verify_id(indio_dev); |
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if (err < 0) |
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goto st_magn_power_off; |
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mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS; |
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indio_dev->channels = mdata->sensor_settings->ch; |
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indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; |
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mdata->current_fullscale = &mdata->sensor_settings->fs.fs_avl[0]; |
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mdata->odr = mdata->sensor_settings->odr.odr_avl[0].hz; |
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err = st_sensors_init_sensor(indio_dev, NULL); |
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if (err < 0) |
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goto st_magn_power_off; |
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err = st_magn_allocate_ring(indio_dev); |
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if (err < 0) |
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goto st_magn_power_off; |
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if (mdata->irq > 0) { |
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err = st_sensors_allocate_trigger(indio_dev, |
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ST_MAGN_TRIGGER_OPS); |
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if (err < 0) |
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goto st_magn_probe_trigger_error; |
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} |
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err = iio_device_register(indio_dev); |
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if (err) |
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goto st_magn_device_register_error; |
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dev_info(&indio_dev->dev, "registered magnetometer %s\n", |
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indio_dev->name); |
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return 0; |
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st_magn_device_register_error: |
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if (mdata->irq > 0) |
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st_sensors_deallocate_trigger(indio_dev); |
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st_magn_probe_trigger_error: |
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st_magn_deallocate_ring(indio_dev); |
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st_magn_power_off: |
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st_sensors_power_disable(indio_dev); |
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|
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return err; |
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} |
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EXPORT_SYMBOL(st_magn_common_probe); |
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|
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void st_magn_common_remove(struct iio_dev *indio_dev) |
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{ |
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struct st_sensor_data *mdata = iio_priv(indio_dev); |
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|
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st_sensors_power_disable(indio_dev); |
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|
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iio_device_unregister(indio_dev); |
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if (mdata->irq > 0) |
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st_sensors_deallocate_trigger(indio_dev); |
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|
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st_magn_deallocate_ring(indio_dev); |
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} |
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EXPORT_SYMBOL(st_magn_common_remove); |
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|
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MODULE_AUTHOR("Denis Ciocca <[email protected]>"); |
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MODULE_DESCRIPTION("STMicroelectronics magnetometers driver"); |
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MODULE_LICENSE("GPL v2");
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