Release 4.11 drivers/staging/iio/resolver/ad2s90.c
/*
* ad2s90.c simple support for the ADI Resolver to Digital Converters: AD2S90
*
* Copyright (c) 2010-2010 Analog Devices Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
struct ad2s90_state {
struct mutex lock;
struct spi_device *sdev;
u8 rx[2] ____cacheline_aligned;
};
static int ad2s90_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val,
int *val2,
long m)
{
int ret;
struct ad2s90_state *st = iio_priv(indio_dev);
mutex_lock(&st->lock);
ret = spi_read(st->sdev, st->rx, 2);
if (ret)
goto error_ret;
*val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
error_ret:
mutex_unlock(&st->lock);
return IIO_VAL_INT;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Graf Yang | 90 | 75.00% | 1 | 33.33% |
| Jonathan Cameron | 30 | 25.00% | 2 | 66.67% |
| Total | 120 | 100.00% | 3 | 100.00% |
static const struct iio_info ad2s90_info = {
.read_raw = &ad2s90_read_raw,
.driver_module = THIS_MODULE,
};
static const struct iio_chan_spec ad2s90_chan = {
.type = IIO_ANGL,
.indexed = 1,
.channel = 0,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
};
static int ad2s90_probe(struct spi_device *spi)
{
struct iio_dev *indio_dev;
struct ad2s90_state *st;
int ret = 0;
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
if (!indio_dev)
return -ENOMEM;
st = iio_priv(indio_dev);
spi_set_drvdata(spi, indio_dev);
mutex_init(&st->lock);
st->sdev = spi;
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &ad2s90_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = &ad2s90_chan;
indio_dev->num_channels = 1;
indio_dev->name = spi_get_device_id(spi)->name;
ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
if (ret)
return ret;
/* need 600ns between CS and the first falling edge of SCLK */
spi->max_speed_hz = 830000;
spi->mode = SPI_MODE_3;
spi_setup(spi);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Graf Yang | 104 | 61.90% | 1 | 12.50% |
| Jonathan Cameron | 45 | 26.79% | 5 | 62.50% |
| Sachin Kamat | 12 | 7.14% | 1 | 12.50% |
| Ioana Ciornei | 7 | 4.17% | 1 | 12.50% |
| Total | 168 | 100.00% | 8 | 100.00% |
static const struct spi_device_id ad2s90_id[] = {
{ "ad2s90" },
{}
};
MODULE_DEVICE_TABLE(spi, ad2s90_id);
static struct spi_driver ad2s90_driver = {
.driver = {
.name = "ad2s90",
},
.probe = ad2s90_probe,
.id_table = ad2s90_id,
};
module_spi_driver(ad2s90_driver);
MODULE_AUTHOR("Graff Yang <graff.yang@gmail.com>");
MODULE_DESCRIPTION("Analog Devices AD2S90 Resolver to Digital SPI driver");
MODULE_LICENSE("GPL v2");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Graf Yang | 289 | 63.38% | 1 | 7.14% |
| Jonathan Cameron | 137 | 30.04% | 8 | 57.14% |
| Sachin Kamat | 12 | 2.63% | 1 | 7.14% |
| Lars-Peter Clausen | 8 | 1.75% | 2 | 14.29% |
| Ioana Ciornei | 7 | 1.54% | 1 | 7.14% |
| Paul Gortmaker | 3 | 0.66% | 1 | 7.14% |
| Total | 456 | 100.00% | 14 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.