Orange Pi5 kernel

// 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/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "../common/ssp_sensors/ssp_iio_sensor.h"
 
#define SSP_CHANNEL_COUNT 3
 
#define SSP_ACCEL_NAME "ssp-accelerometer"
static const char ssp_accel_device_name[] = SSP_ACCEL_NAME;
 
enum ssp_accel_3d_channel {
<------>SSP_CHANNEL_SCAN_INDEX_X,
<------>SSP_CHANNEL_SCAN_INDEX_Y,
<------>SSP_CHANNEL_SCAN_INDEX_Z,
<------>SSP_CHANNEL_SCAN_INDEX_TIME,
};
 
static int ssp_accel_read_raw(struct iio_dev *indio_dev,
<------><------><------>      struct iio_chan_spec const *chan,  int *val,
<------><------><------>      int *val2, long mask)
{
<------>u32 t;
<------>struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
 
<------>switch (mask) {
<------>case IIO_CHAN_INFO_SAMP_FREQ:
<------><------>t = ssp_get_sensor_delay(data, SSP_ACCELEROMETER_SENSOR);
<------><------>ssp_convert_to_freq(t, val, val2);
<------><------>return IIO_VAL_INT_PLUS_MICRO;
<------>default:
<------><------>break;
<------>}
 
<------>return -EINVAL;
}
 
static int ssp_accel_write_raw(struct iio_dev *indio_dev,
<------><------><------>       struct iio_chan_spec const *chan, int val,
<------><------><------>       int val2, long mask)
{
<------>int ret;
<------>struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
 
<------>switch (mask) {
<------>case IIO_CHAN_INFO_SAMP_FREQ:
<------><------>ret = ssp_convert_to_time(val, val2);
<------><------>ret = ssp_change_delay(data, SSP_ACCELEROMETER_SENSOR, ret);
<------><------>if (ret < 0)
<------><------><------>dev_err(&indio_dev->dev, "accel sensor enable fail\n");
 
<------><------>return ret;
<------>default:
<------><------>break;
<------>}
 
<------>return -EINVAL;
}
 
static const struct iio_info ssp_accel_iio_info = {
<------>.read_raw = &ssp_accel_read_raw,
<------>.write_raw = &ssp_accel_write_raw,
};
 
static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, };
 
static const struct iio_chan_spec ssp_acc_channels[] = {
<------>SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X),
<------>SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y),
<------>SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z),
<------>SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME),
};
 
static int ssp_process_accel_data(struct iio_dev *indio_dev, void *buf,
<------><------><------><------>  int64_t timestamp)
{
<------>return ssp_common_process_data(indio_dev, buf, SSP_ACCELEROMETER_SIZE,
<------><------><------><------>       timestamp);
}
 
static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = {
<------>.postenable = &ssp_common_buffer_postenable,
<------>.postdisable = &ssp_common_buffer_postdisable,
};
 
static int ssp_accel_probe(struct platform_device *pdev)
{
<------>int ret;
<------>struct iio_dev *indio_dev;
<------>struct ssp_sensor_data *spd;
<------>struct iio_buffer *buffer;
 
<------>indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
<------>if (!indio_dev)
<------><------>return -ENOMEM;
 
<------>spd = iio_priv(indio_dev);
 
<------>spd->process_data = ssp_process_accel_data;
<------>spd->type = SSP_ACCELEROMETER_SENSOR;
 
<------>indio_dev->name = ssp_accel_device_name;
<------>indio_dev->info = &ssp_accel_iio_info;
<------>indio_dev->modes = INDIO_BUFFER_SOFTWARE;
<------>indio_dev->channels = ssp_acc_channels;
<------>indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels);
<------>indio_dev->available_scan_masks = ssp_accel_scan_mask;
 
<------>buffer = devm_iio_kfifo_allocate(&pdev->dev);
<------>if (!buffer)
<------><------>return -ENOMEM;
 
<------>iio_device_attach_buffer(indio_dev, buffer);
 
<------>indio_dev->setup_ops = &ssp_accel_buffer_ops;
 
<------>platform_set_drvdata(pdev, indio_dev);
 
<------>ret = devm_iio_device_register(&pdev->dev, indio_dev);
<------>if (ret < 0)
<------><------>return ret;
 
<------>/* ssp registering should be done after all iio setup */
<------>ssp_register_consumer(indio_dev, SSP_ACCELEROMETER_SENSOR);
 
<------>return 0;
}
 
static struct platform_driver ssp_accel_driver = {
<------>.driver = {
<------><------>.name = SSP_ACCEL_NAME,
<------>},
<------>.probe = ssp_accel_probe,
};
 
module_platform_driver(ssp_accel_driver);
 
MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>");
MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver");
MODULE_LICENSE("GPL");