linux/drivers/iio/gyro/ssp_gyro_sensor.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

150 lines
3.8 KiB
C

// 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_GYROSCOPE_NAME "ssp-gyroscope"
static const char ssp_gyro_name[] = SSP_GYROSCOPE_NAME;
enum ssp_gyro_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_gyro_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_GYROSCOPE_SENSOR);
ssp_convert_to_freq(t, val, val2);
return IIO_VAL_INT_PLUS_MICRO;
default:
break;
}
return -EINVAL;
}
static int ssp_gyro_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_GYROSCOPE_SENSOR, ret);
if (ret < 0)
dev_err(&indio_dev->dev, "gyro sensor enable fail\n");
return ret;
default:
break;
}
return -EINVAL;
}
static const struct iio_info ssp_gyro_iio_info = {
.read_raw = &ssp_gyro_read_raw,
.write_raw = &ssp_gyro_write_raw,
};
static const unsigned long ssp_gyro_scan_mask[] = { 0x07, 0, };
static const struct iio_chan_spec ssp_gyro_channels[] = {
SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X),
SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y),
SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z),
SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME),
};
static int ssp_process_gyro_data(struct iio_dev *indio_dev, void *buf,
int64_t timestamp)
{
return ssp_common_process_data(indio_dev, buf, SSP_GYROSCOPE_SIZE,
timestamp);
}
static const struct iio_buffer_setup_ops ssp_gyro_buffer_ops = {
.postenable = &ssp_common_buffer_postenable,
.postdisable = &ssp_common_buffer_postdisable,
};
static int ssp_gyro_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_gyro_data;
spd->type = SSP_GYROSCOPE_SENSOR;
indio_dev->name = ssp_gyro_name;
indio_dev->dev.parent = &pdev->dev;
indio_dev->info = &ssp_gyro_iio_info;
indio_dev->modes = INDIO_BUFFER_SOFTWARE;
indio_dev->channels = ssp_gyro_channels;
indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels);
indio_dev->available_scan_masks = ssp_gyro_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_gyro_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_GYROSCOPE_SENSOR);
return 0;
}
static struct platform_driver ssp_gyro_driver = {
.driver = {
.name = SSP_GYROSCOPE_NAME,
},
.probe = ssp_gyro_probe,
};
module_platform_driver(ssp_gyro_driver);
MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>");
MODULE_DESCRIPTION("Samsung sensorhub gyroscopes driver");
MODULE_LICENSE("GPL");