linux/drivers/iio/resolver/ad2s90.c

// SPDX-License-Identifier: GPL-2.0
/*
 * ad2s90.c simple support for the ADI Resolver to Digital Converters: AD2S90
 *
 * Copyright (c) 2010-2010 Analog Devices Inc.
 */
#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>

/*
 * Although chip's max frequency is 2Mhz, it needs 600ns between CS and the
 * first falling edge of SCLK, so frequency should be at most 1 / (2 * 6e-7)
 */
#define AD2S90_MAX_SPI_FREQ_HZ …

struct ad2s90_state { … };

static int ad2s90_read_raw(struct iio_dev *indio_dev,
			   struct iio_chan_spec const *chan,
			   int *val,
			   int *val2,
			   long m)
{ … }

static const struct iio_info ad2s90_info = …;

static const struct iio_chan_spec ad2s90_chan = …;

static int ad2s90_probe(struct spi_device *spi)
{ … }

static const struct of_device_id ad2s90_of_match[] = …;
MODULE_DEVICE_TABLE(of, ad2s90_of_match);

static const struct spi_device_id ad2s90_id[] = …;
MODULE_DEVICE_TABLE(spi, ad2s90_id);

static struct spi_driver ad2s90_driver = …;
module_spi_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;