// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright ( C ) 2014 , Samsung Electronics Co . Ltd . All Rights Reserved .
*/
#include <linux/iio/common/ssp_sensors.h>
#include <linux/iio/buffer.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/unaligned.h>
#include <linux/units.h>
#include "ssp_iio_sensor.h"
/**
* ssp_common_buffer_postenable ( ) - generic postenable callback for ssp buffer
*
* @ indio_dev : iio device
*
* Returns 0 or negative value in case of error
*/
int ssp_common_buffer_postenable(struct iio_dev *indio_dev)
{
struct ssp_sensor_data *spd = iio_priv(indio_dev);
struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
/* the allocation is made in post because scan size is known in this
* moment
* */
spd->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL | GFP_DMA);
if (!spd->buffer)
return -ENOMEM;
return ssp_enable_sensor(data, spd->type,
ssp_get_sensor_delay(data, spd->type));
}
EXPORT_SYMBOL_NS(ssp_common_buffer_postenable, "IIO_SSP_SENSORS" );
/**
* ssp_common_buffer_postdisable ( ) - generic postdisable callback for ssp buffer
*
* @ indio_dev : iio device
*
* Returns 0 or negative value in case of error
*/
int ssp_common_buffer_postdisable(struct iio_dev *indio_dev)
{
int ret;
struct ssp_sensor_data *spd = iio_priv(indio_dev);
struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
ret = ssp_disable_sensor(data, spd->type);
if (ret < 0 )
return ret;
kfree(spd->buffer);
return ret;
}
EXPORT_SYMBOL_NS(ssp_common_buffer_postdisable, "IIO_SSP_SENSORS" );
/**
* ssp_common_process_data ( ) - Common process data callback for ssp sensors
*
* @ indio_dev : iio device
* @ buf : source buffer
* @ len : sensor data length
* @ timestamp : system timestamp
*
* Returns 0 or negative value in case of error
*/
int ssp_common_process_data(struct iio_dev *indio_dev, void *buf,
unsigned int len, int64_t timestamp)
{
int64_t calculated_time;
struct ssp_sensor_data *spd = iio_priv(indio_dev);
if (indio_dev->scan_bytes == 0 )
return 0 ;
/*
* it always sends full set of samples , remember about available masks
*/
memcpy(spd->buffer, buf, len);
calculated_time = timestamp +
(int64_t)get_unaligned_le32(buf + len) * MEGA;
return iio_push_to_buffers_with_timestamp(indio_dev, spd->buffer,
calculated_time);
}
EXPORT_SYMBOL_NS(ssp_common_process_data, "IIO_SSP_SENSORS" );
MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>" );
MODULE_DESCRIPTION("Samsung sensorhub commons" );
MODULE_LICENSE("GPL" );
MODULE_IMPORT_NS("IIO_SSP_SENSORS" );
Messung V0.5 in Prozent C=94 H=93 G=93
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-10-11)
¤
*© Formatika GbR, Deutschland