linux_dsm_epyc7002/drivers/iio/accel/ssp_accel_sensor.c
Lars-Peter Clausen 8cb631ccbb iio: Remove superfluous of_node assignments
If a driver does not assign an of_node to a IIO device to IIO core will
automatically assign the of_node of the parent device. This automatic
assignment is done in the iio_device_register() function.

There is a fair amount of drivers that currently manually assign the
of_node of the IIO device. All but 4 of them can make use of the automatic
assignment though.

The exceptions are:
 * mxs-lradc-adc: Which uses the of_node of the parent of the parent.
 * stm32-dfsdm-adc, stm32-adc and stm32-dac: Which reference the of_node
   assigned to the IIO device before iio_device_register() is called.

All other drivers are updated to use automatic assignment. This reduces
the amount of boilerplate code involved in setting up the IIO device.

The patch has mostly been auto-generated with the following semantic patch

// <smpl>
@exists@
expression indio_dev;
expression parent;
@@
indio_dev = \(devm_iio_device_alloc\|iio_device_alloc\)(&parent, ...)
...
-indio_dev->dev.of_node = parent.of_node;

@exists@
expression indio_dev;
expression parent;
@@
indio_dev = \(devm_iio_device_alloc\|iio_device_alloc\)(parent, ...)
...
-indio_dev->dev.of_node = parent->of_node;
// </smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14 14:20:08 +01:00

149 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_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");