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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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6d0981f964
Drop conditional in favor of always calculating the timestamp value. This simplifies the code and allows to drop usage of internal private variable "scan_timestamp" of the struct iio_dev. Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com> Link: https://patch.msgid.link/20241214191421.94172-4-vassilisamir@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
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*/
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#include <linux/iio/common/ssp_sensors.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/kfifo_buf.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/unaligned.h>
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#include <linux/units.h>
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#include "ssp_iio_sensor.h"
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/**
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* ssp_common_buffer_postenable() - generic postenable callback for ssp buffer
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*
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* @indio_dev: iio device
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*
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* Returns 0 or negative value in case of error
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*/
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int ssp_common_buffer_postenable(struct iio_dev *indio_dev)
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{
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struct ssp_sensor_data *spd = iio_priv(indio_dev);
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struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
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/* the allocation is made in post because scan size is known in this
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* moment
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* */
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spd->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL | GFP_DMA);
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if (!spd->buffer)
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return -ENOMEM;
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return ssp_enable_sensor(data, spd->type,
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ssp_get_sensor_delay(data, spd->type));
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}
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EXPORT_SYMBOL_NS(ssp_common_buffer_postenable, "IIO_SSP_SENSORS");
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/**
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* ssp_common_buffer_postdisable() - generic postdisable callback for ssp buffer
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*
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* @indio_dev: iio device
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*
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* Returns 0 or negative value in case of error
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*/
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int ssp_common_buffer_postdisable(struct iio_dev *indio_dev)
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{
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int ret;
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struct ssp_sensor_data *spd = iio_priv(indio_dev);
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struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
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ret = ssp_disable_sensor(data, spd->type);
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if (ret < 0)
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return ret;
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kfree(spd->buffer);
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return ret;
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}
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EXPORT_SYMBOL_NS(ssp_common_buffer_postdisable, "IIO_SSP_SENSORS");
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/**
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* ssp_common_process_data() - Common process data callback for ssp sensors
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*
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* @indio_dev: iio device
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* @buf: source buffer
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* @len: sensor data length
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* @timestamp: system timestamp
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*
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* Returns 0 or negative value in case of error
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*/
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int ssp_common_process_data(struct iio_dev *indio_dev, void *buf,
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unsigned int len, int64_t timestamp)
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{
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int64_t calculated_time;
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struct ssp_sensor_data *spd = iio_priv(indio_dev);
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if (indio_dev->scan_bytes == 0)
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return 0;
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/*
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* it always sends full set of samples, remember about available masks
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*/
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memcpy(spd->buffer, buf, len);
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calculated_time = timestamp +
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(int64_t)get_unaligned_le32(buf + len) * MEGA;
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return iio_push_to_buffers_with_timestamp(indio_dev, spd->buffer,
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calculated_time);
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}
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EXPORT_SYMBOL_NS(ssp_common_process_data, "IIO_SSP_SENSORS");
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MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>");
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MODULE_DESCRIPTION("Samsung sensorhub commons");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("IIO_SSP_SENSORS");
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