path: root/drivers/iio/accel/st_accel_core.c

// 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/slab.h>
#include <linux/acpi.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger.h>
#include <linux/iio/buffer.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_chan_spec st_accel_8bit_channels[] = {
	ST_SENSORS_LSM_CHANNELS(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_SENSORS_LSM_CHANNELS(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_SENSORS_LSM_CHANNELS(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),
	IIO_CHAN_SOFT_TIMESTAMP(3)
};

static const struct iio_chan_spec st_accel_12bit_channels[] = {
	ST_SENSORS_LSM_CHANNELS(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_SENSORS_LSM_CHANNELS(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_SENSORS_LSM_CHANNELS(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),
	IIO_CHAN_SOFT_TIMESTAMP(3)
};

static const struct iio_chan_spec st_accel_16bit_channels[] = {
	ST_SENSORS_LSM_CHANNELS(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_SENSORS_LSM_CHANNELS(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_SENSORS_LSM_CHANNELS(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),
	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,
			[