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linux-stable/drivers/iio/accel/st_accel_core.c
Miquel Raynal 1234596839 iio: st_sensors: Stop abusing mlock to ensure internal coherency 
An odr_lock has been introduced to protect local accesses to the odr
internal cache and ensure the cached value always reflected the actual
value. Using the mlock() for this purpose is no longer needed, so let's
drop these extra mutex_lock/unlock() calls.

Suggested-by: Jonathan Cameron <jic23@kernel.org>
Cc: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20220207143840.707510-8-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-04-10 16:21:45 +01:00

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// 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,
},
{
/* 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 = 0x41,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LIS2HH12_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,
},
.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;
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(indio_dev->dev.parent);
if (!adev)
return 0;
/* 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 0;
} else if (ACPI_FAILURE(status)) {
dev_warn(&indio_dev->dev, "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(&indio_dev->dev, "computed mount matrix from ACPI\n");
out:
kfree(buffer.pointer);
if (ret)
dev_dbg(&indio_dev->dev,
"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);
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