// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* STMicroelectronics sensors core library driver
|
*
|
* Copyright 2012-2013 STMicroelectronics Inc.
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*
|
* Denis Ciocca <denis.ciocca@st.com>
|
*/
|
|
#include <linux/kernel.h>
|
#include <linux/module.h>
|
#include <linux/slab.h>
|
#include <linux/delay.h>
|
#include <linux/iio/iio.h>
|
#include <linux/property.h>
|
#include <linux/regulator/consumer.h>
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#include <linux/regmap.h>
|
#include <asm/unaligned.h>
|
#include <linux/iio/common/st_sensors.h>
|
|
#include "st_sensors_core.h"
|
|
int st_sensors_write_data_with_mask(struct iio_dev *indio_dev,
|
u8 reg_addr, u8 mask, u8 data)
|
{
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
return regmap_update_bits(sdata->regmap,
|
reg_addr, mask, data << __ffs(mask));
|
}
|
|
int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev,
|
unsigned reg, unsigned writeval,
|
unsigned *readval)
|
{
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
int err;
|
|
if (!readval)
|
return regmap_write(sdata->regmap, reg, writeval);
|
|
err = regmap_read(sdata->regmap, reg, readval);
|
if (err < 0)
|
return err;
|
|
return 0;
|
}
|
EXPORT_SYMBOL(st_sensors_debugfs_reg_access);
|
|
static int st_sensors_match_odr(struct st_sensor_settings *sensor_settings,
|
unsigned int odr, struct st_sensor_odr_avl *odr_out)
|
{
|
int i, ret = -EINVAL;
|
|
for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) {
|
if (sensor_settings->odr.odr_avl[i].hz == 0)
|
goto st_sensors_match_odr_error;
|
|
if (sensor_settings->odr.odr_avl[i].hz == odr) {
|
odr_out->hz = sensor_settings->odr.odr_avl[i].hz;
|
odr_out->value = sensor_settings->odr.odr_avl[i].value;
|
ret = 0;
|
break;
|
}
|
}
|
|
st_sensors_match_odr_error:
|
return ret;
|
}
|
|
int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr)
|
{
|
int err = 0;
|
struct st_sensor_odr_avl odr_out = {0, 0};
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
mutex_lock(&sdata->odr_lock);
|
|
if (!sdata->sensor_settings->odr.mask)
|
goto unlock_mutex;
|
|
err = st_sensors_match_odr(sdata->sensor_settings, odr, &odr_out);
|
if (err < 0)
|
goto unlock_mutex;
|
|
if ((sdata->sensor_settings->odr.addr ==
|
sdata->sensor_settings->pw.addr) &&
|
(sdata->sensor_settings->odr.mask ==
|
sdata->sensor_settings->pw.mask)) {
|
if (sdata->enabled == true) {
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->odr.addr,
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sdata->sensor_settings->odr.mask,
|
odr_out.value);
|
} else {
|
err = 0;
|
}
|
} else {
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err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->odr.addr,
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sdata->sensor_settings->odr.mask,
|
odr_out.value);
|
}
|
if (err >= 0)
|
sdata->odr = odr_out.hz;
|
|
unlock_mutex:
|
mutex_unlock(&sdata->odr_lock);
|
|
return err;
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}
|
EXPORT_SYMBOL(st_sensors_set_odr);
|
|
static int st_sensors_match_fs(struct st_sensor_settings *sensor_settings,
|
unsigned int fs, int *index_fs_avl)
|
{
|
int i, ret = -EINVAL;
|
|
for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) {
|
if (sensor_settings->fs.fs_avl[i].num == 0)
|
return ret;
|
|
if (sensor_settings->fs.fs_avl[i].num == fs) {
|
*index_fs_avl = i;
|
ret = 0;
|
break;
|
}
|
}
|
|
return ret;
|
}
|
|
static int st_sensors_set_fullscale(struct iio_dev *indio_dev, unsigned int fs)
|
{
|
int err, i = 0;
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
if (sdata->sensor_settings->fs.addr == 0)
|
return 0;
|
|
err = st_sensors_match_fs(sdata->sensor_settings, fs, &i);
|
if (err < 0)
|
goto st_accel_set_fullscale_error;
|
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->fs.addr,
|
sdata->sensor_settings->fs.mask,
|
sdata->sensor_settings->fs.fs_avl[i].value);
|
if (err < 0)
|
goto st_accel_set_fullscale_error;
|
|
sdata->current_fullscale = &sdata->sensor_settings->fs.fs_avl[i];
|
return err;
|
|
st_accel_set_fullscale_error:
|
dev_err(&indio_dev->dev, "failed to set new fullscale.\n");
|
return err;
|
}
|
|
int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable)
|
{
|
u8 tmp_value;
|
int err = -EINVAL;
|
bool found = false;
|
struct st_sensor_odr_avl odr_out = {0, 0};
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
if (enable) {
|
tmp_value = sdata->sensor_settings->pw.value_on;
|
if ((sdata->sensor_settings->odr.addr ==
|
sdata->sensor_settings->pw.addr) &&
|
(sdata->sensor_settings->odr.mask ==
|
sdata->sensor_settings->pw.mask)) {
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err = st_sensors_match_odr(sdata->sensor_settings,
|
sdata->odr, &odr_out);
|
if (err < 0)
|
goto set_enable_error;
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tmp_value = odr_out.value;
|
found = true;
|
}
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->pw.addr,
|
sdata->sensor_settings->pw.mask, tmp_value);
|
if (err < 0)
|
goto set_enable_error;
|
|
sdata->enabled = true;
|
|
if (found)
|
sdata->odr = odr_out.hz;
|
} else {
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->pw.addr,
|
sdata->sensor_settings->pw.mask,
|
sdata->sensor_settings->pw.value_off);
|
if (err < 0)
|
goto set_enable_error;
|
|
sdata->enabled = false;
|
}
|
|
set_enable_error:
|
return err;
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}
|
EXPORT_SYMBOL(st_sensors_set_enable);
|
|
int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable)
|
{
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
int err = 0;
|
|
if (sdata->sensor_settings->enable_axis.addr)
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->enable_axis.addr,
|
sdata->sensor_settings->enable_axis.mask,
|
axis_enable);
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return err;
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}
|
EXPORT_SYMBOL(st_sensors_set_axis_enable);
|
|
int st_sensors_power_enable(struct iio_dev *indio_dev)
|
{
|
struct st_sensor_data *pdata = iio_priv(indio_dev);
|
int err;
|
|
/* Regulators not mandatory, but if requested we should enable them. */
|
pdata->vdd = devm_regulator_get(indio_dev->dev.parent, "vdd");
|
if (IS_ERR(pdata->vdd)) {
|
dev_err(&indio_dev->dev, "unable to get Vdd supply\n");
|
return PTR_ERR(pdata->vdd);
|
}
|
err = regulator_enable(pdata->vdd);
|
if (err != 0) {
|
dev_warn(&indio_dev->dev,
|
"Failed to enable specified Vdd supply\n");
|
return err;
|
}
|
|
pdata->vdd_io = devm_regulator_get(indio_dev->dev.parent, "vddio");
|
if (IS_ERR(pdata->vdd_io)) {
|
dev_err(&indio_dev->dev, "unable to get Vdd_IO supply\n");
|
err = PTR_ERR(pdata->vdd_io);
|
goto st_sensors_disable_vdd;
|
}
|
err = regulator_enable(pdata->vdd_io);
|
if (err != 0) {
|
dev_warn(&indio_dev->dev,
|
"Failed to enable specified Vdd_IO supply\n");
|
goto st_sensors_disable_vdd;
|
}
|
|
return 0;
|
|
st_sensors_disable_vdd:
|
regulator_disable(pdata->vdd);
|
return err;
|
}
|
EXPORT_SYMBOL(st_sensors_power_enable);
|
|
void st_sensors_power_disable(struct iio_dev *indio_dev)
|
{
|
struct st_sensor_data *pdata = iio_priv(indio_dev);
|
|
regulator_disable(pdata->vdd);
|
regulator_disable(pdata->vdd_io);
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}
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EXPORT_SYMBOL(st_sensors_power_disable);
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|
static int st_sensors_set_drdy_int_pin(struct iio_dev *indio_dev,
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struct st_sensors_platform_data *pdata)
|
{
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
/* Sensor does not support interrupts */
|
if (!sdata->sensor_settings->drdy_irq.int1.addr &&
|
!sdata->sensor_settings->drdy_irq.int2.addr) {
|
if (pdata->drdy_int_pin)
|
dev_info(&indio_dev->dev,
|
"DRDY on pin INT%d specified, but sensor does not support interrupts\n",
|
pdata->drdy_int_pin);
|
return 0;
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}
|
|
switch (pdata->drdy_int_pin) {
|
case 1:
|
if (!sdata->sensor_settings->drdy_irq.int1.mask) {
|
dev_err(&indio_dev->dev,
|
"DRDY on INT1 not available.\n");
|
return -EINVAL;
|
}
|
sdata->drdy_int_pin = 1;
|
break;
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case 2:
|
if (!sdata->sensor_settings->drdy_irq.int2.mask) {
|
dev_err(&indio_dev->dev,
|
"DRDY on INT2 not available.\n");
|
return -EINVAL;
|
}
|
sdata->drdy_int_pin = 2;
|
break;
|
default:
|
dev_err(&indio_dev->dev, "DRDY on pdata not valid.\n");
|
return -EINVAL;
|
}
|
|
if (pdata->open_drain) {
|
if (!sdata->sensor_settings->drdy_irq.int1.addr_od &&
|
!sdata->sensor_settings->drdy_irq.int2.addr_od)
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dev_err(&indio_dev->dev,
|
"open drain requested but unsupported.\n");
|
else
|
sdata->int_pin_open_drain = true;
|
}
|
|
return 0;
|
}
|
|
static struct st_sensors_platform_data *st_sensors_dev_probe(struct device *dev,
|
struct st_sensors_platform_data *defdata)
|
{
|
struct st_sensors_platform_data *pdata;
|
u32 val;
|
|
if (!dev_fwnode(dev))
|
return NULL;
|
|
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
|
if (!pdata)
|
return ERR_PTR(-ENOMEM);
|
if (!device_property_read_u32(dev, "st,drdy-int-pin", &val) && (val <= 2))
|
pdata->drdy_int_pin = (u8) val;
|
else
|
pdata->drdy_int_pin = defdata ? defdata->drdy_int_pin : 0;
|
|
pdata->open_drain = device_property_read_bool(dev, "drive-open-drain");
|
|
return pdata;
|
}
|
|
/**
|
* st_sensors_dev_name_probe() - device probe for ST sensor name
|
* @dev: driver model representation of the device.
|
* @name: device name buffer reference.
|
* @len: device name buffer length.
|
*
|
* In effect this function matches an ID to an internal kernel
|
* name for a certain sensor device, so that the rest of the autodetection can
|
* rely on that name from this point on. I2C/SPI devices will be renamed
|
* to match the internal kernel convention.
|
*/
|
void st_sensors_dev_name_probe(struct device *dev, char *name, int len)
|
{
|
const void *match;
|
|
match = device_get_match_data(dev);
|
if (!match)
|
return;
|
|
/* The name from the match takes precedence if present */
|
strlcpy(name, match, len);
|
}
|
EXPORT_SYMBOL(st_sensors_dev_name_probe);
|
|
int st_sensors_init_sensor(struct iio_dev *indio_dev,
|
struct st_sensors_platform_data *pdata)
|
{
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
struct st_sensors_platform_data *of_pdata;
|
int err = 0;
|
|
mutex_init(&sdata->odr_lock);
|
|
/* If OF/DT pdata exists, it will take precedence of anything else */
|
of_pdata = st_sensors_dev_probe(indio_dev->dev.parent, pdata);
|
if (IS_ERR(of_pdata))
|
return PTR_ERR(of_pdata);
|
if (of_pdata)
|
pdata = of_pdata;
|
|
if (pdata) {
|
err = st_sensors_set_drdy_int_pin(indio_dev, pdata);
|
if (err < 0)
|
return err;
|
}
|
|
err = st_sensors_set_enable(indio_dev, false);
|
if (err < 0)
|
return err;
|
|
/* Disable DRDY, this might be still be enabled after reboot. */
|
err = st_sensors_set_dataready_irq(indio_dev, false);
|
if (err < 0)
|
return err;
|
|
if (sdata->current_fullscale) {
|
err = st_sensors_set_fullscale(indio_dev,
|
sdata->current_fullscale->num);
|
if (err < 0)
|
return err;
|
} else
|
dev_info(&indio_dev->dev, "Full-scale not possible\n");
|
|
err = st_sensors_set_odr(indio_dev, sdata->odr);
|
if (err < 0)
|
return err;
|
|
/* set BDU */
|
if (sdata->sensor_settings->bdu.addr) {
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->bdu.addr,
|
sdata->sensor_settings->bdu.mask, true);
|
if (err < 0)
|
return err;
|
}
|
|
/* set DAS */
|
if (sdata->sensor_settings->das.addr) {
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->das.addr,
|
sdata->sensor_settings->das.mask, 1);
|
if (err < 0)
|
return err;
|
}
|
|
if (sdata->int_pin_open_drain) {
|
u8 addr, mask;
|
|
if (sdata->drdy_int_pin == 1) {
|
addr = sdata->sensor_settings->drdy_irq.int1.addr_od;
|
mask = sdata->sensor_settings->drdy_irq.int1.mask_od;
|
} else {
|
addr = sdata->sensor_settings->drdy_irq.int2.addr_od;
|
mask = sdata->sensor_settings->drdy_irq.int2.mask_od;
|
}
|
|
dev_info(&indio_dev->dev,
|
"set interrupt line to open drain mode on pin %d\n",
|
sdata->drdy_int_pin);
|
err = st_sensors_write_data_with_mask(indio_dev, addr,
|
mask, 1);
|
if (err < 0)
|
return err;
|
}
|
|
err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
|
|
return err;
|
}
|
EXPORT_SYMBOL(st_sensors_init_sensor);
|
|
int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable)
|
{
|
int err;
|
u8 drdy_addr, drdy_mask;
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
if (!sdata->sensor_settings->drdy_irq.int1.addr &&
|
!sdata->sensor_settings->drdy_irq.int2.addr) {
|
/*
|
* there are some devices (e.g. LIS3MDL) where drdy line is
|
* routed to a given pin and it is not possible to select a
|
* different one. Take into account irq status register
|
* to understand if irq trigger can be properly supported
|
*/
|
if (sdata->sensor_settings->drdy_irq.stat_drdy.addr)
|
sdata->hw_irq_trigger = enable;
|
return 0;
|
}
|
|
/* Enable/Disable the interrupt generator 1. */
|
if (sdata->sensor_settings->drdy_irq.ig1.en_addr > 0) {
|
err = st_sensors_write_data_with_mask(indio_dev,
|
sdata->sensor_settings->drdy_irq.ig1.en_addr,
|
sdata->sensor_settings->drdy_irq.ig1.en_mask,
|
(int)enable);
|
if (err < 0)
|
goto st_accel_set_dataready_irq_error;
|
}
|
|
if (sdata->drdy_int_pin == 1) {
|
drdy_addr = sdata->sensor_settings->drdy_irq.int1.addr;
|
drdy_mask = sdata->sensor_settings->drdy_irq.int1.mask;
|
} else {
|
drdy_addr = sdata->sensor_settings->drdy_irq.int2.addr;
|
drdy_mask = sdata->sensor_settings->drdy_irq.int2.mask;
|
}
|
|
/* Flag to the poll function that the hardware trigger is in use */
|
sdata->hw_irq_trigger = enable;
|
|
/* Enable/Disable the interrupt generator for data ready. */
|
err = st_sensors_write_data_with_mask(indio_dev, drdy_addr,
|
drdy_mask, (int)enable);
|
|
st_accel_set_dataready_irq_error:
|
return err;
|
}
|
EXPORT_SYMBOL(st_sensors_set_dataready_irq);
|
|
int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale)
|
{
|
int err = -EINVAL, i;
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) {
|
if ((sdata->sensor_settings->fs.fs_avl[i].gain == scale) &&
|
(sdata->sensor_settings->fs.fs_avl[i].gain != 0)) {
|
err = 0;
|
break;
|
}
|
}
|
if (err < 0)
|
goto st_sensors_match_scale_error;
|
|
err = st_sensors_set_fullscale(indio_dev,
|
sdata->sensor_settings->fs.fs_avl[i].num);
|
|
st_sensors_match_scale_error:
|
return err;
|
}
|
EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain);
|
|
static int st_sensors_read_axis_data(struct iio_dev *indio_dev,
|
struct iio_chan_spec const *ch, int *data)
|
{
|
int err;
|
u8 *outdata;
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
unsigned int byte_for_channel;
|
|
byte_for_channel = DIV_ROUND_UP(ch->scan_type.realbits +
|
ch->scan_type.shift, 8);
|
outdata = kmalloc(byte_for_channel, GFP_DMA | GFP_KERNEL);
|
if (!outdata)
|
return -ENOMEM;
|
|
err = regmap_bulk_read(sdata->regmap, ch->address,
|
outdata, byte_for_channel);
|
if (err < 0)
|
goto st_sensors_free_memory;
|
|
if (byte_for_channel == 1)
|
*data = (s8)*outdata;
|
else if (byte_for_channel == 2)
|
*data = (s16)get_unaligned_le16(outdata);
|
else if (byte_for_channel == 3)
|
*data = (s32)sign_extend32(get_unaligned_le24(outdata), 23);
|
|
st_sensors_free_memory:
|
kfree(outdata);
|
|
return err;
|
}
|
|
int st_sensors_read_info_raw(struct iio_dev *indio_dev,
|
struct iio_chan_spec const *ch, int *val)
|
{
|
int err;
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
mutex_lock(&indio_dev->mlock);
|
if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
|
err = -EBUSY;
|
goto out;
|
} else {
|
mutex_lock(&sdata->odr_lock);
|
err = st_sensors_set_enable(indio_dev, true);
|
if (err < 0) {
|
mutex_unlock(&sdata->odr_lock);
|
goto out;
|
}
|
|
msleep((sdata->sensor_settings->bootime * 1000) / sdata->odr);
|
err = st_sensors_read_axis_data(indio_dev, ch, val);
|
if (err < 0) {
|
mutex_unlock(&sdata->odr_lock);
|
goto out;
|
}
|
|
*val = *val >> ch->scan_type.shift;
|
|
err = st_sensors_set_enable(indio_dev, false);
|
mutex_unlock(&sdata->odr_lock);
|
}
|
out:
|
mutex_unlock(&indio_dev->mlock);
|
|
return err;
|
}
|
EXPORT_SYMBOL(st_sensors_read_info_raw);
|
|
/*
|
* st_sensors_get_settings_index() - get index of the sensor settings for a
|
* specific device from list of settings
|
* @name: device name buffer reference.
|
* @list: sensor settings list.
|
* @list_length: length of sensor settings list.
|
*
|
* Return: non negative number on success (valid index),
|
* negative error code otherwise.
|
*/
|
int st_sensors_get_settings_index(const char *name,
|
const struct st_sensor_settings *list,
|
const int list_length)
|
{
|
int i, n;
|
|
for (i = 0; i < list_length; i++) {
|
for (n = 0; n < ST_SENSORS_MAX_4WAI; n++) {
|
if (strcmp(name, list[i].sensors_supported[n]) == 0)
|
return i;
|
}
|
}
|
|
return -ENODEV;
|
}
|
EXPORT_SYMBOL(st_sensors_get_settings_index);
|
|
/*
|
* st_sensors_verify_id() - verify sensor ID (WhoAmI) is matching with the
|
* expected value
|
* @indio_dev: IIO device reference.
|
*
|
* Return: 0 on success (valid sensor ID), else a negative error code.
|
*/
|
int st_sensors_verify_id(struct iio_dev *indio_dev)
|
{
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
int wai, err;
|
|
if (sdata->sensor_settings->wai_addr) {
|
err = regmap_read(sdata->regmap,
|
sdata->sensor_settings->wai_addr, &wai);
|
if (err < 0) {
|
dev_err(&indio_dev->dev,
|
"failed to read Who-Am-I register.\n");
|
return err;
|
}
|
|
if (sdata->sensor_settings->wai != wai) {
|
dev_err(&indio_dev->dev,
|
"%s: WhoAmI mismatch (0x%x).\n",
|
indio_dev->name, wai);
|
return -EINVAL;
|
}
|
}
|
|
return 0;
|
}
|
EXPORT_SYMBOL(st_sensors_verify_id);
|
|
ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev,
|
struct device_attribute *attr, char *buf)
|
{
|
int i, len = 0;
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
mutex_lock(&indio_dev->mlock);
|
for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) {
|
if (sdata->sensor_settings->odr.odr_avl[i].hz == 0)
|
break;
|
|
len += scnprintf(buf + len, PAGE_SIZE - len, "%d ",
|
sdata->sensor_settings->odr.odr_avl[i].hz);
|
}
|
mutex_unlock(&indio_dev->mlock);
|
buf[len - 1] = '\n';
|
|
return len;
|
}
|
EXPORT_SYMBOL(st_sensors_sysfs_sampling_frequency_avail);
|
|
ssize_t st_sensors_sysfs_scale_avail(struct device *dev,
|
struct device_attribute *attr, char *buf)
|
{
|
int i, len = 0, q, r;
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
struct st_sensor_data *sdata = iio_priv(indio_dev);
|
|
mutex_lock(&indio_dev->mlock);
|
for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) {
|
if (sdata->sensor_settings->fs.fs_avl[i].num == 0)
|
break;
|
|
q = sdata->sensor_settings->fs.fs_avl[i].gain / 1000000;
|
r = sdata->sensor_settings->fs.fs_avl[i].gain % 1000000;
|
|
len += scnprintf(buf + len, PAGE_SIZE - len, "%u.%06u ", q, r);
|
}
|
mutex_unlock(&indio_dev->mlock);
|
buf[len - 1] = '\n';
|
|
return len;
|
}
|
EXPORT_SYMBOL(st_sensors_sysfs_scale_avail);
|
|
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
|
MODULE_DESCRIPTION("STMicroelectronics ST-sensors core");
|
MODULE_LICENSE("GPL v2");
|
