// SPDX-License-Identifier: GPL-2.0-only
/*
 * STMicroelectronics accelerometers driver
 *
 * Copyright 2012-2013 STMicroelectronics Inc.
 *
 * Denis Ciocca <denis.ciocca@st.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger.h>

#include <linux/iio/common/st_sensors.h>
#include "st_accel.h"

#define ST_ACCEL_NUMBER_DATA_CHANNELS           3

/* DEFAULT VALUE FOR SENSORS */
#define ST_ACCEL_DEFAULT_OUT_X_L_ADDR           0x28
#define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR           0x2a
#define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR           0x2c

/* FULLSCALE */
#define ST_ACCEL_FS_AVL_2G                      2
#define ST_ACCEL_FS_AVL_4G                      4
#define ST_ACCEL_FS_AVL_6G                      6
#define ST_ACCEL_FS_AVL_8G                      8
#define ST_ACCEL_FS_AVL_16G                     16
#define ST_ACCEL_FS_AVL_100G                    100
#define ST_ACCEL_FS_AVL_200G                    200
#define ST_ACCEL_FS_AVL_400G                    400

static const struct iio_mount_matrix *
st_accel_get_mount_matrix(const struct iio_dev *indio_dev,
                          const struct iio_chan_spec *chan)
{
        struct st_sensor_data *adata = iio_priv(indio_dev);

        return &adata->mount_matrix;
}

static const struct iio_chan_spec_ext_info st_accel_mount_matrix_ext_info[] = {
        IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, st_accel_get_mount_matrix),
        { }
};

static const struct iio_chan_spec st_accel_8bit_channels[] = {
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8,
                        ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1,
                        st_accel_mount_matrix_ext_info),
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8,
                        ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1,
                        st_accel_mount_matrix_ext_info),
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8,
                        ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1,
                        st_accel_mount_matrix_ext_info),
        IIO_CHAN_SOFT_TIMESTAMP(3)
};

static const struct iio_chan_spec st_accel_12bit_channels[] = {
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
                        ST_ACCEL_DEFAULT_OUT_X_L_ADDR,
                        st_accel_mount_matrix_ext_info),
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
                        ST_ACCEL_DEFAULT_OUT_Y_L_ADDR,
                        st_accel_mount_matrix_ext_info),
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
                        ST_ACCEL_DEFAULT_OUT_Z_L_ADDR,
                        st_accel_mount_matrix_ext_info),
        IIO_CHAN_SOFT_TIMESTAMP(3)
};

static const struct iio_chan_spec st_accel_16bit_channels[] = {
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
                        ST_ACCEL_DEFAULT_OUT_X_L_ADDR,
                        st_accel_mount_matrix_ext_info),
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
                        ST_ACCEL_DEFAULT_OUT_Y_L_ADDR,
                        st_accel_mount_matrix_ext_info),
        ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL,
                        BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
                        ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
                        ST_ACCEL_DEFAULT_OUT_Z_L_ADDR,
                        st_accel_mount_matrix_ext_info),
        IIO_CHAN_SOFT_TIMESTAMP(3)
};

static const struct st_sensor_settings st_accel_sensors_settings[] = {
        {
                .wai = 0x33,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS3DH_ACCEL_DEV_NAME,
                        [1] = LSM303DLHC_ACCEL_DEV_NAME,
                        [2] = LSM330D_ACCEL_DEV_NAME,
                        [3] = LSM330DL_ACCEL_DEV_NAME,
                        [4] = LSM330DLC_ACCEL_DEV_NAME,
                        [5] = LSM303AGR_ACCEL_DEV_NAME,
                        [6] = LIS2DH12_ACCEL_DEV_NAME,
                        [7] = LIS3DE_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .odr_avl = {
                                { .hz = 1, .value = 0x01, },
                                { .hz = 10, .value = 0x02, },
                                { .hz = 25, .value = 0x03, },
                                { .hz = 50, .value = 0x04, },
                                { .hz = 100, .value = 0x05, },
                                { .hz = 200, .value = 0x06, },
                                { .hz = 400, .value = 0x07, },
                                { .hz = 1600, .value = 0x08, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(1000),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(2000),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(4000),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(12000),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x23,
                        .mask = 0x80,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x10,
                        },
                        .addr_ihl = 0x25,
                        .mask_ihl = 0x02,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                .wai = 0x32,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS331DLH_ACCEL_DEV_NAME,
                        [1] = LSM303DL_ACCEL_DEV_NAME,
                        [2] = LSM303DLH_ACCEL_DEV_NAME,
                        [3] = LSM303DLM_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0x18,
                        .odr_avl = {
                                { .hz = 50, .value = 0x00, },
                                { .hz = 100, .value = 0x01, },
                                { .hz = 400, .value = 0x02, },
                                { .hz = 1000, .value = 0x03, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xe0,
                        .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(1000),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(2000),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(3900),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x23,
                        .mask = 0x80,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x02,
                                .addr_od = 0x22,
                                .mask_od = 0x40,
                        },
                        .int2 = {
                                .addr = 0x22,
                                .mask = 0x10,
                                .addr_od = 0x22,
                                .mask_od = 0x40,
                        },
                        .addr_ihl = 0x22,
                        .mask_ihl = 0x80,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                .wai = 0x40,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LSM330_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .odr_avl = {
                                { .hz = 3, .value = 0x01, },
                                { .hz = 6, .value = 0x02, },
                                { .hz = 12, .value = 0x03, },
                                { .hz = 25, .value = 0x04, },
                                { .hz = 50, .value = 0x05, },
                                { .hz = 100, .value = 0x06, },
                                { .hz = 200, .value = 0x07, },
                                { .hz = 400, .value = 0x08, },
                                { .hz = 800, .value = 0x09, },
                                { .hz = 1600, .value = 0x0a, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x24,
                        .mask = 0x38,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(61),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(122),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_6G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(183),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(244),
                                },
                                [4] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x04,
                                        .gain = IIO_G_TO_M_S_2(732),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x20,
                        .mask = 0x08,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x23,
                                .mask = 0x80,
                        },
                        .addr_ihl = 0x23,
                        .mask_ihl = 0x40,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                        .ig1 = {
                                .en_addr = 0x23,
                                .en_mask = 0x08,
                        },
                },
                .sim = {
                        .addr = 0x24,
                        .value = BIT(0),
                },
                .multi_read_bit = false,
                .bootime = 2,
        },
        {
                .wai = 0x3a,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS3LV02DL_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0x30, /* DF1 and DF0 */
                        .odr_avl = {
                                { .hz = 40, .value = 0x00, },
                                { .hz = 160, .value = 0x01, },
                                { .hz = 640, .value = 0x02, },
                                { .hz = 2560, .value = 0x03, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xc0,
                        .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x21,
                        .mask = 0x80,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(1000),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_6G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(3000),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x21,
                        .mask = 0x40,
                },
                /*
                 * Data Alignment Setting - needs to be set to get
                 * left-justified data like all other sensors.
                 */
                .das = {
                        .addr = 0x21,
                        .mask = 0x01,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x21,
                                .mask = 0x04,
                        },
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x21,
                        .value = BIT(1),
                },
                .multi_read_bit = true,
                .bootime = 2, /* guess */
        },
        {
                .wai = 0x3b,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS331DL_ACCEL_DEV_NAME,
                        [1] = LIS302DL_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0x80,
                        .odr_avl = {
                                { .hz = 100, .value = 0x00, },
                                { .hz = 400, .value = 0x01, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0x40,
                        .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x20,
                        .mask = 0x20,
                        /*
                         * TODO: check these resulting gain settings, these are
                         * not in the datsheet
                         */
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(18000),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(72000),
                                },
                        },
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x04,
                                .addr_od = 0x22,
                                .mask_od = 0x40,
                        },
                        .int2 = {
                                .addr = 0x22,
                                .mask = 0x20,
                                .addr_od = 0x22,
                                .mask_od = 0x40,
                        },
                        .addr_ihl = 0x22,
                        .mask_ihl = 0x80,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x21,
                        .value = BIT(7),
                },
                .multi_read_bit = false,
                .bootime = 2, /* guess */
        },
        {
                .wai = 0x32,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = H3LIS331DL_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0x18,
                        .odr_avl = {
                                { .hz = 50, .value = 0x00, },
                                { .hz = 100, .value = 0x01, },
                                { .hz = 400, .value = 0x02, },
                                { .hz = 1000, .value = 0x03, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0x20,
                        .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_100G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(49000),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_200G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(98000),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_400G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(195000),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x23,
                        .mask = 0x80,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x02,
                        },
                        .int2 = {
                                .addr = 0x22,
                                .mask = 0x10,
                        },
                        .addr_ihl = 0x22,
                        .mask_ihl = 0x80,
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                .wai = 0x32,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = IIS328DQ_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0x18,
                        .odr_avl = {
                                { .hz = 50, .value = 0x00, },
                                { .hz = 100, .value = 0x01, },
                                { .hz = 400, .value = 0x02, },
                                { .hz = 1000, .value = 0x03, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0x20,
                        .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_100G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(980),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_200G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(1950),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_400G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(3910),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x23,
                        .mask = 0x80,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x02,
                        },
                        .int2 = {
                                .addr = 0x22,
                                .mask = 0x10,
                        },
                        .addr_ihl = 0x22,
                        .mask_ihl = 0x80,
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                /* No WAI register present */
                .sensors_supported = {
                        [0] = LIS3L02DQ_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0x30,
                        .odr_avl = {
                                { .hz = 280, .value = 0x00, },
                                { .hz = 560, .value = 0x01, },
                                { .hz = 1120, .value = 0x02, },
                                { .hz = 4480, .value = 0x03, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xc0,
                        .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .gain = IIO_G_TO_M_S_2(488),
                                },
                        },
                },
                /*
                 * The part has a BDU bit but if set the data is never
                 * updated so don't set it.
                 */
                .bdu = {
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x21,
                                .mask = 0x04,
                        },
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x21,
                        .value = BIT(1),
                },
                .multi_read_bit = false,
                .bootime = 2,
        },
        {
                .wai = 0x33,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LNG2DM_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .odr_avl = {
                                { .hz = 1, .value = 0x01, },
                                { .hz = 10, .value = 0x02, },
                                { .hz = 25, .value = 0x03, },
                                { .hz = 50, .value = 0x04, },
                                { .hz = 100, .value = 0x05, },
                                { .hz = 200, .value = 0x06, },
                                { .hz = 400, .value = 0x07, },
                                { .hz = 1600, .value = 0x08, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(15600),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(31200),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(62500),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(187500),
                                },
                        },
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x10,
                        },
                        .addr_ihl = 0x25,
                        .mask_ihl = 0x02,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                .wai = 0x44,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS2DW12_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .odr_avl = {
                                { .hz = 1, .value = 0x01, },
                                { .hz = 12, .value = 0x02, },
                                { .hz = 25, .value = 0x03, },
                                { .hz = 50, .value = 0x04, },
                                { .hz = 100, .value = 0x05, },
                                { .hz = 200, .value = 0x06, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .fs = {
                        .addr = 0x25,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(976),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(1952),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(3904),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(7808),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x21,
                        .mask = 0x08,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x23,
                                .mask = 0x01,
                                .addr_od = 0x22,
                                .mask_od = 0x20,
                        },
                        .int2 = {
                                .addr = 0x24,
                                .mask = 0x01,
                                .addr_od = 0x22,
                                .mask_od = 0x20,
                        },
                        .addr_ihl = 0x22,
                        .mask_ihl = 0x08,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x01,
                        },
                },
                .sim = {
                        .addr = 0x21,
                        .value = BIT(0),
                },
                .multi_read_bit = false,
                .bootime = 2,
        },
        {
                .wai = 0x11,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS3DHH_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
                .odr = {
                        /* just ODR = 1100Hz available */
                        .odr_avl = {
                                { .hz = 1100, .value = 0x00, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0x80,
                        .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .fs = {
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .gain = IIO_G_TO_M_S_2(76),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x20,
                        .mask = 0x01,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x21,
                                .mask = 0x80,
                                .addr_od = 0x23,
                                .mask_od = 0x04,
                        },
                        .int2 = {
                                .addr = 0x22,
                                .mask = 0x80,
                                .addr_od = 0x23,
                                .mask_od = 0x08,
                        },
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .multi_read_bit = false,
                .bootime = 2,
        },
        {
                .wai = 0x33,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS2DE12_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .odr_avl = {
                                { .hz = 1, .value = 0x01, },
                                { .hz = 10, .value = 0x02, },
                                { .hz = 25, .value = 0x03, },
                                { .hz = 50, .value = 0x04, },
                                { .hz = 100, .value = 0x05, },
                                { .hz = 200, .value = 0x06, },
                                { .hz = 400, .value = 0x07, },
                                { .hz = 1620, .value = 0x08, },
                                { .hz = 5376, .value = 0x09, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(15600),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(31200),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(62500),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(187500),
                                },
                        },
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x10,
                        },
                        .addr_ihl = 0x25,
                        .mask_ihl = 0x02,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                .wai = 0x43,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS2DS12_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .odr_avl = {
                                { .hz = 10, .value = 0x01, },
                                { .hz = 50, .value = 0x02, },
                                { .hz = 100, .value = 0x03, },
                                { .hz = 200, .value = 0x04, },
                                { .hz = 400, .value = 0x05, },
                                { .hz = 800, .value = 0x06, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x20,
                        .mask = 0x0c,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(61),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(122),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(244),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(488),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x20,
                        .mask = 0x01,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x23,
                                .mask = 0x01,
                        },
                        .int2 = {
                                .addr = 0x24,
                                .mask = 0x01,
                        },
                        .addr_ihl = 0x22,
                        .mask_ihl = 0x02,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x01,
                        },
                },
                .sim = {
                        .addr = 0x21,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                .wai = 0x41,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LIS2HH12_ACCEL_DEV_NAME,
                        [1] = LSM303C_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0x70,
                        .odr_avl = {
                                { .hz = 10, .value = 0x01, },
                                { .hz = 50, .value = 0x02, },
                                { .hz = 100, .value = 0x03, },
                                { .hz = 200, .value = 0x04, },
                                { .hz = 400, .value = 0x05, },
                                { .hz = 800, .value = 0x06, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0x70,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(61),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(122),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(244),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x20,
                        .mask = 0x08,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x01,
                        },
                        .int2 = {
                                .addr = 0x25,
                                .mask = 0x01,
                        },
                        .addr_ihl = 0x24,
                        .mask_ihl = 0x02,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                .wai = 0x49,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = LSM9DS0_IMU_DEV_NAME,
                        [1] = LSM303D_IMU_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = GENMASK(7, 4),
                        .odr_avl = {
                                { 3, 0x01, },
                                { 6, 0x02, },
                                { 12, 0x03, },
                                { 25, 0x04, },
                                { 50, 0x05, },
                                { 100, 0x06, },
                                { 200, 0x07, },
                                { 400, 0x08, },
                                { 800, 0x09, },
                                { 1600, 0x0a, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = GENMASK(7, 4),
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x21,
                        .mask = GENMASK(5, 3),
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(61),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(122),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_6G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(183),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(244),
                                },
                                [4] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x04,
                                        .gain = IIO_G_TO_M_S_2(732),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x20,
                        .mask = BIT(3),
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = BIT(2),
                        },
                        .int2 = {
                                .addr = 0x23,
                                .mask = BIT(3),
                        },
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = GENMASK(2, 0),
                        },
                },
                .sim = {
                        .addr = 0x21,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
        {
                /*
                 * Not an ST part. Register-compatible with the LIS2DH, even
                 * though the WAI value is different.
                 */
                .wai = 0x11,
                .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
                .sensors_supported = {
                        [0] = SC7A20_ACCEL_DEV_NAME,
                },
                .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
                .odr = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .odr_avl = {
                                { .hz = 1, .value = 0x01, },
                                { .hz = 10, .value = 0x02, },
                                { .hz = 25, .value = 0x03, },
                                { .hz = 50, .value = 0x04, },
                                { .hz = 100, .value = 0x05, },
                                { .hz = 200, .value = 0x06, },
                                { .hz = 400, .value = 0x07, },
                                { .hz = 1600, .value = 0x08, },
                        },
                },
                .pw = {
                        .addr = 0x20,
                        .mask = 0xf0,
                        .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
                },
                .enable_axis = {
                        .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
                        .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
                },
                .fs = {
                        .addr = 0x23,
                        .mask = 0x30,
                        .fs_avl = {
                                [0] = {
                                        .num = ST_ACCEL_FS_AVL_2G,
                                        .value = 0x00,
                                        .gain = IIO_G_TO_M_S_2(1000),
                                },
                                [1] = {
                                        .num = ST_ACCEL_FS_AVL_4G,
                                        .value = 0x01,
                                        .gain = IIO_G_TO_M_S_2(2000),
                                },
                                [2] = {
                                        .num = ST_ACCEL_FS_AVL_8G,
                                        .value = 0x02,
                                        .gain = IIO_G_TO_M_S_2(4000),
                                },
                                [3] = {
                                        .num = ST_ACCEL_FS_AVL_16G,
                                        .value = 0x03,
                                        .gain = IIO_G_TO_M_S_2(12000),
                                },
                        },
                },
                .bdu = {
                        .addr = 0x23,
                        .mask = 0x80,
                },
                .drdy_irq = {
                        .int1 = {
                                .addr = 0x22,
                                .mask = 0x10,
                        },
                        .addr_ihl = 0x25,
                        .mask_ihl = 0x02,
                        .stat_drdy = {
                                .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
                                .mask = 0x07,
                        },
                },
                .sim = {
                        .addr = 0x23,
                        .value = BIT(0),
                },
                .multi_read_bit = true,
                .bootime = 2,
        },
};

/* Default accel DRDY is available on INT1 pin */
static const struct st_sensors_platform_data default_accel_pdata = {
        .drdy_int_pin = 1,
};

static int st_accel_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 *adata = 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:
                *val = adata->current_fullscale->gain / 1000000;
                *val2 = adata->current_fullscale->gain % 1000000;
                return IIO_VAL_INT_PLUS_MICRO;
        case IIO_CHAN_INFO_SAMP_FREQ:
                *val = adata->odr;
                return IIO_VAL_INT;
        default:
                return -EINVAL;
        }

read_error:
        return err;
}

static int st_accel_write_raw(struct iio_dev *indio_dev,
                struct iio_chan_spec const *chan, int val, int val2, long mask)
{
        switch (mask) {
        case IIO_CHAN_INFO_SCALE: {
                int gain;

                gain = val * 1000000 + val2;
                return st_sensors_set_fullscale_by_gain(indio_dev, gain);
        }
        case IIO_CHAN_INFO_SAMP_FREQ:
                if (val2)
                        return -EINVAL;

                return st_sensors_set_odr(indio_dev, val);
        default:
                return -EINVAL;
        }
}

static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);

static struct attribute *st_accel_attributes[] = {
        &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
        &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
        NULL,
};

static const struct attribute_group st_accel_attribute_group = {
        .attrs = st_accel_attributes,
};

static const struct iio_info accel_info = {
        .attrs = &st_accel_attribute_group,
        .read_raw = &st_accel_read_raw,
        .write_raw = &st_accel_write_raw,
        .debugfs_reg_access = &st_sensors_debugfs_reg_access,
};

#ifdef CONFIG_IIO_TRIGGER
static const struct iio_trigger_ops st_accel_trigger_ops = {
        .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
        .validate_device = st_sensors_validate_device,
};
#define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
#else
#define ST_ACCEL_TRIGGER_OPS NULL
#endif

#ifdef CONFIG_ACPI
/* Read ST-specific _ONT orientation data from ACPI and generate an
 * appropriate mount matrix.
 */
static int apply_acpi_orientation(struct iio_dev *indio_dev)
{
        struct st_sensor_data *adata = iio_priv(indio_dev);
        struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
        struct acpi_device *adev;
        union acpi_object *ont;
        union acpi_object *elements;
        acpi_status status;
        struct device *parent = indio_dev->dev.parent;
        int ret = -EINVAL;
        unsigned int val;
        int i, j;
        int final_ont[3][3] = { { 0 }, };

        /* For some reason, ST's _ONT translation does not apply directly
         * to the data read from the sensor. Another translation must be
         * performed first, as described by the matrix below. Perhaps
         * ST required this specific translation for the first product
         * where the device was mounted?
         */
        const int default_ont[3][3] = {
                {  0,  1,  0 },
                { -1,  0,  0 },
                {  0,  0, -1 },
        };


        adev = ACPI_COMPANION(parent);
        if (!adev)
                return -ENXIO;

        /* Read _ONT data, which should be a package of 6 integers. */
        status = acpi_evaluate_object(adev->handle, "_ONT", NULL, &buffer);
        if (status == AE_NOT_FOUND) {
                return -ENXIO;
        } else if (ACPI_FAILURE(status)) {
                dev_warn(parent, "failed to execute _ONT: %d\n", status);
                return status;
        }

        ont = buffer.pointer;
        if (ont->type != ACPI_TYPE_PACKAGE || ont->package.count != 6)
                goto out;

        /* The first 3 integers provide axis order information.
         * e.g. 0 1 2 would indicate normal X,Y,Z ordering.
         * e.g. 1 0 2 indicates that data arrives in order Y,X,Z.
         */
        elements = ont->package.elements;
        for (i = 0; i < 3; i++) {
                if (elements[i].type != ACPI_TYPE_INTEGER)
                        goto out;

                val = elements[i].integer.value;
                if (val > 2)
                        goto out;

                /* Avoiding full matrix multiplication, we simply reorder the
                 * columns in the default_ont matrix according to the
                 * ordering provided by _ONT.
                 */
                final_ont[0][i] = default_ont[0][val];
                final_ont[1][i] = default_ont[1][val];
                final_ont[2][i] = default_ont[2][val];
        }

        /* The final 3 integers provide sign flip information.
         * 0 means no change, 1 means flip.
         * e.g. 0 0 1 means that Z data should be sign-flipped.
         * This is applied after the axis reordering from above.
         */
        elements += 3;
        for (i = 0; i < 3; i++) {
                if (elements[i].type != ACPI_TYPE_INTEGER)
                        goto out;

                val = elements[i].integer.value;
                if (val != 0 && val != 1)
                        goto out;
                if (!val)
                        continue;

                /* Flip the values in the indicated column */
                final_ont[0][i] *= -1;
                final_ont[1][i] *= -1;
                final_ont[2][i] *= -1;
        }

        /* Convert our integer matrix to a string-based iio_mount_matrix */
        for (i = 0; i < 3; i++) {
                for (j = 0; j < 3; j++) {
                        int matrix_val = final_ont[i][j];
                        char *str_value;

                        switch (matrix_val) {
                        case -1:
                                str_value = "-1";
                                break;
                        case 0:
                                str_value = "0";
                                break;
                        case 1:
                                str_value = "1";
                                break;
                        default:
                                goto out;
                        }
                        adata->mount_matrix.rotation[i * 3 + j] = str_value;
                }
        }

        ret = 0;
        dev_info(parent, "computed mount matrix from ACPI\n");

out:
        kfree(buffer.pointer);
        if (ret)
                dev_dbg(parent,
                        "failed to apply ACPI orientation data: %d\n", ret);

        return ret;
}
#else /* !CONFIG_ACPI */
static int apply_acpi_orientation(struct iio_dev *indio_dev)
{
        return -EINVAL;
}
#endif

/*
 * st_accel_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_accel_get_settings(const char *name)
{
        int index = st_sensors_get_settings_index(name,
                                        st_accel_sensors_settings,
                                        ARRAY_SIZE(st_accel_sensors_settings));
        if (index < 0)
                return NULL;

        return &st_accel_sensors_settings[index];
}
EXPORT_SYMBOL_NS(st_accel_get_settings, "IIO_ST_SENSORS");

int st_accel_common_probe(struct iio_dev *indio_dev)
{
        struct st_sensor_data *adata = iio_priv(indio_dev);
        struct device *parent = indio_dev->dev.parent;
        struct st_sensors_platform_data *pdata = dev_get_platdata(parent);
        int err;

        indio_dev->modes = INDIO_DIRECT_MODE;
        indio_dev->info = &accel_info;

        err = st_sensors_verify_id(indio_dev);
        if (err < 0)
                return err;

        adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
        indio_dev->channels = adata->sensor_settings->ch;
        indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;

        /*
         * First try specific ACPI methods to retrieve orientation then try the
         * generic function.
         */
        err = apply_acpi_orientation(indio_dev);
        if (err) {
                err = iio_read_mount_matrix(parent, &adata->mount_matrix);
                if (err)
                        return err;
        }

        adata->current_fullscale = &adata->sensor_settings->fs.fs_avl[0];
        adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;

        if (!pdata)
                pdata = (struct st_sensors_platform_data *)&default_accel_pdata;

        err = st_sensors_init_sensor(indio_dev, pdata);
        if (err < 0)
                return err;

        err = st_accel_allocate_ring(indio_dev);
        if (err < 0)
                return err;

        if (adata->irq > 0) {
                err = st_sensors_allocate_trigger(indio_dev,
                                                 ST_ACCEL_TRIGGER_OPS);
                if (err < 0)
                        return err;
        }

        return devm_iio_device_register(parent, indio_dev);
}
EXPORT_SYMBOL_NS(st_accel_common_probe, "IIO_ST_SENSORS");

MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS("IIO_ST_SENSORS");